ccf75169dd6fb50e2f8ce584af8fa7841fa55fd6
   1#!/usr/bin/perl
   2
   3# gitweb - simple web interface to track changes in git repositories
   4#
   5# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6# (C) 2005, Christian Gierke
   7#
   8# This program is licensed under the GPLv2
   9
  10use 5.008;
  11use strict;
  12use warnings;
  13use CGI qw(:standard :escapeHTML -nosticky);
  14use CGI::Util qw(unescape);
  15use CGI::Carp qw(fatalsToBrowser set_message);
  16use Encode;
  17use Fcntl ':mode';
  18use File::Find qw();
  19use File::Basename qw(basename);
  20use Time::HiRes qw(gettimeofday tv_interval);
  21binmode STDOUT, ':utf8';
  22
  23our $t0 = [ gettimeofday() ];
  24our $number_of_git_cmds = 0;
  25
  26BEGIN {
  27        CGI->compile() if $ENV{'MOD_PERL'};
  28}
  29
  30our $version = "++GIT_VERSION++";
  31
  32our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33sub evaluate_uri {
  34        our $cgi;
  35
  36        our $my_url = $cgi->url();
  37        our $my_uri = $cgi->url(-absolute => 1);
  38
  39        # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40        # needed and used only for URLs with nonempty PATH_INFO
  41        our $base_url = $my_url;
  42
  43        # When the script is used as DirectoryIndex, the URL does not contain the name
  44        # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45        # have to do it ourselves. We make $path_info global because it's also used
  46        # later on.
  47        #
  48        # Another issue with the script being the DirectoryIndex is that the resulting
  49        # $my_url data is not the full script URL: this is good, because we want
  50        # generated links to keep implying the script name if it wasn't explicitly
  51        # indicated in the URL we're handling, but it means that $my_url cannot be used
  52        # as base URL.
  53        # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54        # to build the base URL ourselves:
  55        our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56        if ($path_info) {
  57                # $path_info has already been URL-decoded by the web server, but
  58                # $my_url and $my_uri have not. URL-decode them so we can properly
  59                # strip $path_info.
  60                $my_url = unescape($my_url);
  61                $my_uri = unescape($my_uri);
  62                if ($my_url =~ s,\Q$path_info\E$,, &&
  63                    $my_uri =~ s,\Q$path_info\E$,, &&
  64                    defined $ENV{'SCRIPT_NAME'}) {
  65                        $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                }
  67        }
  68
  69        # target of the home link on top of all pages
  70        our $home_link = $my_uri || "/";
  71}
  72
  73# core git executable to use
  74# this can just be "git" if your webserver has a sensible PATH
  75our $GIT = "++GIT_BINDIR++/git";
  76
  77# absolute fs-path which will be prepended to the project path
  78#our $projectroot = "/pub/scm";
  79our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81# fs traversing limit for getting project list
  82# the number is relative to the projectroot
  83our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85# string of the home link on top of all pages
  86our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88# extra breadcrumbs preceding the home link
  89our @extra_breadcrumbs = ();
  90
  91# name of your site or organization to appear in page titles
  92# replace this with something more descriptive for clearer bookmarks
  93our $site_name = "++GITWEB_SITENAME++"
  94                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  95
  96# html snippet to include in the <head> section of each page
  97our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  98# filename of html text to include at top of each page
  99our $site_header = "++GITWEB_SITE_HEADER++";
 100# html text to include at home page
 101our $home_text = "++GITWEB_HOMETEXT++";
 102# filename of html text to include at bottom of each page
 103our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105# URI of stylesheets
 106our @stylesheets = ("++GITWEB_CSS++");
 107# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108our $stylesheet = undef;
 109# URI of GIT logo (72x27 size)
 110our $logo = "++GITWEB_LOGO++";
 111# URI of GIT favicon, assumed to be image/png type
 112our $favicon = "++GITWEB_FAVICON++";
 113# URI of gitweb.js (JavaScript code for gitweb)
 114our $javascript = "++GITWEB_JS++";
 115
 116# URI and label (title) of GIT logo link
 117#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118#our $logo_label = "git documentation";
 119our $logo_url = "http://git-scm.com/";
 120our $logo_label = "git homepage";
 121
 122# source of projects list
 123our $projects_list = "++GITWEB_LIST++";
 124
 125# the width (in characters) of the projects list "Description" column
 126our $projects_list_description_width = 25;
 127
 128# group projects by category on the projects list
 129# (enabled if this variable evaluates to true)
 130our $projects_list_group_categories = 0;
 131
 132# default category if none specified
 133# (leave the empty string for no category)
 134our $project_list_default_category = "";
 135
 136# default order of projects list
 137# valid values are none, project, descr, owner, and age
 138our $default_projects_order = "project";
 139
 140# show repository only if this file exists
 141# (only effective if this variable evaluates to true)
 142our $export_ok = "++GITWEB_EXPORT_OK++";
 143
 144# don't generate age column on the projects list page
 145our $omit_age_column = 0;
 146
 147# don't generate information about owners of repositories
 148our $omit_owner=0;
 149
 150# show repository only if this subroutine returns true
 151# when given the path to the project, for example:
 152#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 153our $export_auth_hook = undef;
 154
 155# only allow viewing of repositories also shown on the overview page
 156our $strict_export = "++GITWEB_STRICT_EXPORT++";
 157
 158# list of git base URLs used for URL to where fetch project from,
 159# i.e. full URL is "$git_base_url/$project"
 160our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 161
 162# default blob_plain mimetype and default charset for text/plain blob
 163our $default_blob_plain_mimetype = 'text/plain';
 164our $default_text_plain_charset  = undef;
 165
 166# file to use for guessing MIME types before trying /etc/mime.types
 167# (relative to the current git repository)
 168our $mimetypes_file = undef;
 169
 170# assume this charset if line contains non-UTF-8 characters;
 171# it should be valid encoding (see Encoding::Supported(3pm) for list),
 172# for which encoding all byte sequences are valid, for example
 173# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 174# could be even 'utf-8' for the old behavior)
 175our $fallback_encoding = 'latin1';
 176
 177# rename detection options for git-diff and git-diff-tree
 178# - default is '-M', with the cost proportional to
 179#   (number of removed files) * (number of new files).
 180# - more costly is '-C' (which implies '-M'), with the cost proportional to
 181#   (number of changed files + number of removed files) * (number of new files)
 182# - even more costly is '-C', '--find-copies-harder' with cost
 183#   (number of files in the original tree) * (number of new files)
 184# - one might want to include '-B' option, e.g. '-B', '-M'
 185our @diff_opts = ('-M'); # taken from git_commit
 186
 187# Disables features that would allow repository owners to inject script into
 188# the gitweb domain.
 189our $prevent_xss = 0;
 190
 191# Path to the highlight executable to use (must be the one from
 192# http://www.andre-simon.de due to assumptions about parameters and output).
 193# Useful if highlight is not installed on your webserver's PATH.
 194# [Default: highlight]
 195our $highlight_bin = "++HIGHLIGHT_BIN++";
 196
 197# information about snapshot formats that gitweb is capable of serving
 198our %known_snapshot_formats = (
 199        # name => {
 200        #       'display' => display name,
 201        #       'type' => mime type,
 202        #       'suffix' => filename suffix,
 203        #       'format' => --format for git-archive,
 204        #       'compressor' => [compressor command and arguments]
 205        #                       (array reference, optional)
 206        #       'disabled' => boolean (optional)}
 207        #
 208        'tgz' => {
 209                'display' => 'tar.gz',
 210                'type' => 'application/x-gzip',
 211                'suffix' => '.tar.gz',
 212                'format' => 'tar',
 213                'compressor' => ['gzip', '-n']},
 214
 215        'tbz2' => {
 216                'display' => 'tar.bz2',
 217                'type' => 'application/x-bzip2',
 218                'suffix' => '.tar.bz2',
 219                'format' => 'tar',
 220                'compressor' => ['bzip2']},
 221
 222        'txz' => {
 223                'display' => 'tar.xz',
 224                'type' => 'application/x-xz',
 225                'suffix' => '.tar.xz',
 226                'format' => 'tar',
 227                'compressor' => ['xz'],
 228                'disabled' => 1},
 229
 230        'zip' => {
 231                'display' => 'zip',
 232                'type' => 'application/x-zip',
 233                'suffix' => '.zip',
 234                'format' => 'zip'},
 235);
 236
 237# Aliases so we understand old gitweb.snapshot values in repository
 238# configuration.
 239our %known_snapshot_format_aliases = (
 240        'gzip'  => 'tgz',
 241        'bzip2' => 'tbz2',
 242        'xz'    => 'txz',
 243
 244        # backward compatibility: legacy gitweb config support
 245        'x-gzip' => undef, 'gz' => undef,
 246        'x-bzip2' => undef, 'bz2' => undef,
 247        'x-zip' => undef, '' => undef,
 248);
 249
 250# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 251# are changed, it may be appropriate to change these values too via
 252# $GITWEB_CONFIG.
 253our %avatar_size = (
 254        'default' => 16,
 255        'double'  => 32
 256);
 257
 258# Used to set the maximum load that we will still respond to gitweb queries.
 259# If server load exceed this value then return "503 server busy" error.
 260# If gitweb cannot determined server load, it is taken to be 0.
 261# Leave it undefined (or set to 'undef') to turn off load checking.
 262our $maxload = 300;
 263
 264# configuration for 'highlight' (http://www.andre-simon.de/)
 265# match by basename
 266our %highlight_basename = (
 267        #'Program' => 'py',
 268        #'Library' => 'py',
 269        'SConstruct' => 'py', # SCons equivalent of Makefile
 270        'Makefile' => 'make',
 271);
 272# match by extension
 273our %highlight_ext = (
 274        # main extensions, defining name of syntax;
 275        # see files in /usr/share/highlight/langDefs/ directory
 276        (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 277        # alternate extensions, see /etc/highlight/filetypes.conf
 278        (map { $_ => 'c'   } qw(c h)),
 279        (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 280        (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 281        (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 282        (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 283        (map { $_ => 'make'} qw(make mak mk)),
 284        (map { $_ => 'xml' } qw(xml xhtml html htm)),
 285);
 286
 287# You define site-wide feature defaults here; override them with
 288# $GITWEB_CONFIG as necessary.
 289our %feature = (
 290        # feature => {
 291        #       'sub' => feature-sub (subroutine),
 292        #       'override' => allow-override (boolean),
 293        #       'default' => [ default options...] (array reference)}
 294        #
 295        # if feature is overridable (it means that allow-override has true value),
 296        # then feature-sub will be called with default options as parameters;
 297        # return value of feature-sub indicates if to enable specified feature
 298        #
 299        # if there is no 'sub' key (no feature-sub), then feature cannot be
 300        # overridden
 301        #
 302        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 303        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 304        # is enabled
 305
 306        # Enable the 'blame' blob view, showing the last commit that modified
 307        # each line in the file. This can be very CPU-intensive.
 308
 309        # To enable system wide have in $GITWEB_CONFIG
 310        # $feature{'blame'}{'default'} = [1];
 311        # To have project specific config enable override in $GITWEB_CONFIG
 312        # $feature{'blame'}{'override'} = 1;
 313        # and in project config gitweb.blame = 0|1;
 314        'blame' => {
 315                'sub' => sub { feature_bool('blame', @_) },
 316                'override' => 0,
 317                'default' => [0]},
 318
 319        # Enable the 'snapshot' link, providing a compressed archive of any
 320        # tree. This can potentially generate high traffic if you have large
 321        # project.
 322
 323        # Value is a list of formats defined in %known_snapshot_formats that
 324        # you wish to offer.
 325        # To disable system wide have in $GITWEB_CONFIG
 326        # $feature{'snapshot'}{'default'} = [];
 327        # To have project specific config enable override in $GITWEB_CONFIG
 328        # $feature{'snapshot'}{'override'} = 1;
 329        # and in project config, a comma-separated list of formats or "none"
 330        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 331        'snapshot' => {
 332                'sub' => \&feature_snapshot,
 333                'override' => 0,
 334                'default' => ['tgz']},
 335
 336        # Enable text search, which will list the commits which match author,
 337        # committer or commit text to a given string.  Enabled by default.
 338        # Project specific override is not supported.
 339        #
 340        # Note that this controls all search features, which means that if
 341        # it is disabled, then 'grep' and 'pickaxe' search would also be
 342        # disabled.
 343        'search' => {
 344                'override' => 0,
 345                'default' => [1]},
 346
 347        # Enable grep search, which will list the files in currently selected
 348        # tree containing the given string. Enabled by default. This can be
 349        # potentially CPU-intensive, of course.
 350        # Note that you need to have 'search' feature enabled too.
 351
 352        # To enable system wide have in $GITWEB_CONFIG
 353        # $feature{'grep'}{'default'} = [1];
 354        # To have project specific config enable override in $GITWEB_CONFIG
 355        # $feature{'grep'}{'override'} = 1;
 356        # and in project config gitweb.grep = 0|1;
 357        'grep' => {
 358                'sub' => sub { feature_bool('grep', @_) },
 359                'override' => 0,
 360                'default' => [1]},
 361
 362        # Enable the pickaxe search, which will list the commits that modified
 363        # a given string in a file. This can be practical and quite faster
 364        # alternative to 'blame', but still potentially CPU-intensive.
 365        # Note that you need to have 'search' feature enabled too.
 366
 367        # To enable system wide have in $GITWEB_CONFIG
 368        # $feature{'pickaxe'}{'default'} = [1];
 369        # To have project specific config enable override in $GITWEB_CONFIG
 370        # $feature{'pickaxe'}{'override'} = 1;
 371        # and in project config gitweb.pickaxe = 0|1;
 372        'pickaxe' => {
 373                'sub' => sub { feature_bool('pickaxe', @_) },
 374                'override' => 0,
 375                'default' => [1]},
 376
 377        # Enable showing size of blobs in a 'tree' view, in a separate
 378        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 379
 380        # To disable system wide have in $GITWEB_CONFIG
 381        # $feature{'show-sizes'}{'default'} = [0];
 382        # To have project specific config enable override in $GITWEB_CONFIG
 383        # $feature{'show-sizes'}{'override'} = 1;
 384        # and in project config gitweb.showsizes = 0|1;
 385        'show-sizes' => {
 386                'sub' => sub { feature_bool('showsizes', @_) },
 387                'override' => 0,
 388                'default' => [1]},
 389
 390        # Make gitweb use an alternative format of the URLs which can be
 391        # more readable and natural-looking: project name is embedded
 392        # directly in the path and the query string contains other
 393        # auxiliary information. All gitweb installations recognize
 394        # URL in either format; this configures in which formats gitweb
 395        # generates links.
 396
 397        # To enable system wide have in $GITWEB_CONFIG
 398        # $feature{'pathinfo'}{'default'} = [1];
 399        # Project specific override is not supported.
 400
 401        # Note that you will need to change the default location of CSS,
 402        # favicon, logo and possibly other files to an absolute URL. Also,
 403        # if gitweb.cgi serves as your indexfile, you will need to force
 404        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 405        'pathinfo' => {
 406                'override' => 0,
 407                'default' => [0]},
 408
 409        # Make gitweb consider projects in project root subdirectories
 410        # to be forks of existing projects. Given project $projname.git,
 411        # projects matching $projname/*.git will not be shown in the main
 412        # projects list, instead a '+' mark will be added to $projname
 413        # there and a 'forks' view will be enabled for the project, listing
 414        # all the forks. If project list is taken from a file, forks have
 415        # to be listed after the main project.
 416
 417        # To enable system wide have in $GITWEB_CONFIG
 418        # $feature{'forks'}{'default'} = [1];
 419        # Project specific override is not supported.
 420        'forks' => {
 421                'override' => 0,
 422                'default' => [0]},
 423
 424        # Insert custom links to the action bar of all project pages.
 425        # This enables you mainly to link to third-party scripts integrating
 426        # into gitweb; e.g. git-browser for graphical history representation
 427        # or custom web-based repository administration interface.
 428
 429        # The 'default' value consists of a list of triplets in the form
 430        # (label, link, position) where position is the label after which
 431        # to insert the link and link is a format string where %n expands
 432        # to the project name, %f to the project path within the filesystem,
 433        # %h to the current hash (h gitweb parameter) and %b to the current
 434        # hash base (hb gitweb parameter); %% expands to %.
 435
 436        # To enable system wide have in $GITWEB_CONFIG e.g.
 437        # $feature{'actions'}{'default'} = [('graphiclog',
 438        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 439        # Project specific override is not supported.
 440        'actions' => {
 441                'override' => 0,
 442                'default' => []},
 443
 444        # Allow gitweb scan project content tags of project repository,
 445        # and display the popular Web 2.0-ish "tag cloud" near the projects
 446        # list.  Note that this is something COMPLETELY different from the
 447        # normal Git tags.
 448
 449        # gitweb by itself can show existing tags, but it does not handle
 450        # tagging itself; you need to do it externally, outside gitweb.
 451        # The format is described in git_get_project_ctags() subroutine.
 452        # You may want to install the HTML::TagCloud Perl module to get
 453        # a pretty tag cloud instead of just a list of tags.
 454
 455        # To enable system wide have in $GITWEB_CONFIG
 456        # $feature{'ctags'}{'default'} = [1];
 457        # Project specific override is not supported.
 458
 459        # In the future whether ctags editing is enabled might depend
 460        # on the value, but using 1 should always mean no editing of ctags.
 461        'ctags' => {
 462                'override' => 0,
 463                'default' => [0]},
 464
 465        # The maximum number of patches in a patchset generated in patch
 466        # view. Set this to 0 or undef to disable patch view, or to a
 467        # negative number to remove any limit.
 468
 469        # To disable system wide have in $GITWEB_CONFIG
 470        # $feature{'patches'}{'default'} = [0];
 471        # To have project specific config enable override in $GITWEB_CONFIG
 472        # $feature{'patches'}{'override'} = 1;
 473        # and in project config gitweb.patches = 0|n;
 474        # where n is the maximum number of patches allowed in a patchset.
 475        'patches' => {
 476                'sub' => \&feature_patches,
 477                'override' => 0,
 478                'default' => [16]},
 479
 480        # Avatar support. When this feature is enabled, views such as
 481        # shortlog or commit will display an avatar associated with
 482        # the email of the committer(s) and/or author(s).
 483
 484        # Currently available providers are gravatar and picon.
 485        # If an unknown provider is specified, the feature is disabled.
 486
 487        # Gravatar depends on Digest::MD5.
 488        # Picon currently relies on the indiana.edu database.
 489
 490        # To enable system wide have in $GITWEB_CONFIG
 491        # $feature{'avatar'}{'default'} = ['<provider>'];
 492        # where <provider> is either gravatar or picon.
 493        # To have project specific config enable override in $GITWEB_CONFIG
 494        # $feature{'avatar'}{'override'} = 1;
 495        # and in project config gitweb.avatar = <provider>;
 496        'avatar' => {
 497                'sub' => \&feature_avatar,
 498                'override' => 0,
 499                'default' => ['']},
 500
 501        # Enable displaying how much time and how many git commands
 502        # it took to generate and display page.  Disabled by default.
 503        # Project specific override is not supported.
 504        'timed' => {
 505                'override' => 0,
 506                'default' => [0]},
 507
 508        # Enable turning some links into links to actions which require
 509        # JavaScript to run (like 'blame_incremental').  Not enabled by
 510        # default.  Project specific override is currently not supported.
 511        'javascript-actions' => {
 512                'override' => 0,
 513                'default' => [0]},
 514
 515        # Enable and configure ability to change common timezone for dates
 516        # in gitweb output via JavaScript.  Enabled by default.
 517        # Project specific override is not supported.
 518        'javascript-timezone' => {
 519                'override' => 0,
 520                'default' => [
 521                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 522                                     # or undef to turn off this feature
 523                        'gitweb_tz', # name of cookie where to store selected timezone
 524                        'datetime',  # CSS class used to mark up dates for manipulation
 525                ]},
 526
 527        # Syntax highlighting support. This is based on Daniel Svensson's
 528        # and Sham Chukoury's work in gitweb-xmms2.git.
 529        # It requires the 'highlight' program present in $PATH,
 530        # and therefore is disabled by default.
 531
 532        # To enable system wide have in $GITWEB_CONFIG
 533        # $feature{'highlight'}{'default'} = [1];
 534
 535        'highlight' => {
 536                'sub' => sub { feature_bool('highlight', @_) },
 537                'override' => 0,
 538                'default' => [0]},
 539
 540        # Enable displaying of remote heads in the heads list
 541
 542        # To enable system wide have in $GITWEB_CONFIG
 543        # $feature{'remote_heads'}{'default'} = [1];
 544        # To have project specific config enable override in $GITWEB_CONFIG
 545        # $feature{'remote_heads'}{'override'} = 1;
 546        # and in project config gitweb.remoteheads = 0|1;
 547        'remote_heads' => {
 548                'sub' => sub { feature_bool('remote_heads', @_) },
 549                'override' => 0,
 550                'default' => [0]},
 551
 552        # Enable showing branches under other refs in addition to heads
 553
 554        # To set system wide extra branch refs have in $GITWEB_CONFIG
 555        # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 556        # To have project specific config enable override in $GITWEB_CONFIG
 557        # $feature{'extra-branch-refs'}{'override'} = 1;
 558        # and in project config gitweb.extrabranchrefs = dirs of choice
 559        # Every directory is separated with whitespace.
 560
 561        'extra-branch-refs' => {
 562                'sub' => \&feature_extra_branch_refs,
 563                'override' => 0,
 564                'default' => []},
 565);
 566
 567sub gitweb_get_feature {
 568        my ($name) = @_;
 569        return unless exists $feature{$name};
 570        my ($sub, $override, @defaults) = (
 571                $feature{$name}{'sub'},
 572                $feature{$name}{'override'},
 573                @{$feature{$name}{'default'}});
 574        # project specific override is possible only if we have project
 575        our $git_dir; # global variable, declared later
 576        if (!$override || !defined $git_dir) {
 577                return @defaults;
 578        }
 579        if (!defined $sub) {
 580                warn "feature $name is not overridable";
 581                return @defaults;
 582        }
 583        return $sub->(@defaults);
 584}
 585
 586# A wrapper to check if a given feature is enabled.
 587# With this, you can say
 588#
 589#   my $bool_feat = gitweb_check_feature('bool_feat');
 590#   gitweb_check_feature('bool_feat') or somecode;
 591#
 592# instead of
 593#
 594#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 595#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 596#
 597sub gitweb_check_feature {
 598        return (gitweb_get_feature(@_))[0];
 599}
 600
 601
 602sub feature_bool {
 603        my $key = shift;
 604        my ($val) = git_get_project_config($key, '--bool');
 605
 606        if (!defined $val) {
 607                return ($_[0]);
 608        } elsif ($val eq 'true') {
 609                return (1);
 610        } elsif ($val eq 'false') {
 611                return (0);
 612        }
 613}
 614
 615sub feature_snapshot {
 616        my (@fmts) = @_;
 617
 618        my ($val) = git_get_project_config('snapshot');
 619
 620        if ($val) {
 621                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 622        }
 623
 624        return @fmts;
 625}
 626
 627sub feature_patches {
 628        my @val = (git_get_project_config('patches', '--int'));
 629
 630        if (@val) {
 631                return @val;
 632        }
 633
 634        return ($_[0]);
 635}
 636
 637sub feature_avatar {
 638        my @val = (git_get_project_config('avatar'));
 639
 640        return @val ? @val : @_;
 641}
 642
 643sub feature_extra_branch_refs {
 644        my (@branch_refs) = @_;
 645        my $values = git_get_project_config('extrabranchrefs');
 646
 647        if ($values) {
 648                $values = config_to_multi ($values);
 649                @branch_refs = ();
 650                foreach my $value (@{$values}) {
 651                        push @branch_refs, split /\s+/, $value;
 652                }
 653        }
 654
 655        return @branch_refs;
 656}
 657
 658# checking HEAD file with -e is fragile if the repository was
 659# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 660# and then pruned.
 661sub check_head_link {
 662        my ($dir) = @_;
 663        my $headfile = "$dir/HEAD";
 664        return ((-e $headfile) ||
 665                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 666}
 667
 668sub check_export_ok {
 669        my ($dir) = @_;
 670        return (check_head_link($dir) &&
 671                (!$export_ok || -e "$dir/$export_ok") &&
 672                (!$export_auth_hook || $export_auth_hook->($dir)));
 673}
 674
 675# process alternate names for backward compatibility
 676# filter out unsupported (unknown) snapshot formats
 677sub filter_snapshot_fmts {
 678        my @fmts = @_;
 679
 680        @fmts = map {
 681                exists $known_snapshot_format_aliases{$_} ?
 682                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 683        @fmts = grep {
 684                exists $known_snapshot_formats{$_} &&
 685                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 686}
 687
 688sub filter_and_validate_refs {
 689        my @refs = @_;
 690        my %unique_refs = ();
 691
 692        foreach my $ref (@refs) {
 693                die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 694                # 'heads' are added implicitly in get_branch_refs().
 695                $unique_refs{$ref} = 1 if ($ref ne 'heads');
 696        }
 697        return sort keys %unique_refs;
 698}
 699
 700# If it is set to code reference, it is code that it is to be run once per
 701# request, allowing updating configurations that change with each request,
 702# while running other code in config file only once.
 703#
 704# Otherwise, if it is false then gitweb would process config file only once;
 705# if it is true then gitweb config would be run for each request.
 706our $per_request_config = 1;
 707
 708# read and parse gitweb config file given by its parameter.
 709# returns true on success, false on recoverable error, allowing
 710# to chain this subroutine, using first file that exists.
 711# dies on errors during parsing config file, as it is unrecoverable.
 712sub read_config_file {
 713        my $filename = shift;
 714        return unless defined $filename;
 715        # die if there are errors parsing config file
 716        if (-e $filename) {
 717                do $filename;
 718                die $@ if $@;
 719                return 1;
 720        }
 721        return;
 722}
 723
 724our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 725sub evaluate_gitweb_config {
 726        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 727        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 728        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 729
 730        # Protect against duplications of file names, to not read config twice.
 731        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 732        # there possibility of duplication of filename there doesn't matter.
 733        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 734        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 735
 736        # Common system-wide settings for convenience.
 737        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 738        read_config_file($GITWEB_CONFIG_COMMON);
 739
 740        # Use first config file that exists.  This means use the per-instance
 741        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 742        read_config_file($GITWEB_CONFIG) and return;
 743        read_config_file($GITWEB_CONFIG_SYSTEM);
 744}
 745
 746# Get loadavg of system, to compare against $maxload.
 747# Currently it requires '/proc/loadavg' present to get loadavg;
 748# if it is not present it returns 0, which means no load checking.
 749sub get_loadavg {
 750        if( -e '/proc/loadavg' ){
 751                open my $fd, '<', '/proc/loadavg'
 752                        or return 0;
 753                my @load = split(/\s+/, scalar <$fd>);
 754                close $fd;
 755
 756                # The first three columns measure CPU and IO utilization of the last one,
 757                # five, and 10 minute periods.  The fourth column shows the number of
 758                # currently running processes and the total number of processes in the m/n
 759                # format.  The last column displays the last process ID used.
 760                return $load[0] || 0;
 761        }
 762        # additional checks for load average should go here for things that don't export
 763        # /proc/loadavg
 764
 765        return 0;
 766}
 767
 768# version of the core git binary
 769our $git_version;
 770sub evaluate_git_version {
 771        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 772        $number_of_git_cmds++;
 773}
 774
 775sub check_loadavg {
 776        if (defined $maxload && get_loadavg() > $maxload) {
 777                die_error(503, "The load average on the server is too high");
 778        }
 779}
 780
 781# ======================================================================
 782# input validation and dispatch
 783
 784# input parameters can be collected from a variety of sources (presently, CGI
 785# and PATH_INFO), so we define an %input_params hash that collects them all
 786# together during validation: this allows subsequent uses (e.g. href()) to be
 787# agnostic of the parameter origin
 788
 789our %input_params = ();
 790
 791# input parameters are stored with the long parameter name as key. This will
 792# also be used in the href subroutine to convert parameters to their CGI
 793# equivalent, and since the href() usage is the most frequent one, we store
 794# the name -> CGI key mapping here, instead of the reverse.
 795#
 796# XXX: Warning: If you touch this, check the search form for updating,
 797# too.
 798
 799our @cgi_param_mapping = (
 800        project => "p",
 801        action => "a",
 802        file_name => "f",
 803        file_parent => "fp",
 804        hash => "h",
 805        hash_parent => "hp",
 806        hash_base => "hb",
 807        hash_parent_base => "hpb",
 808        page => "pg",
 809        order => "o",
 810        searchtext => "s",
 811        searchtype => "st",
 812        snapshot_format => "sf",
 813        extra_options => "opt",
 814        search_use_regexp => "sr",
 815        ctag => "by_tag",
 816        diff_style => "ds",
 817        project_filter => "pf",
 818        # this must be last entry (for manipulation from JavaScript)
 819        javascript => "js"
 820);
 821our %cgi_param_mapping = @cgi_param_mapping;
 822
 823# we will also need to know the possible actions, for validation
 824our %actions = (
 825        "blame" => \&git_blame,
 826        "blame_incremental" => \&git_blame_incremental,
 827        "blame_data" => \&git_blame_data,
 828        "blobdiff" => \&git_blobdiff,
 829        "blobdiff_plain" => \&git_blobdiff_plain,
 830        "blob" => \&git_blob,
 831        "blob_plain" => \&git_blob_plain,
 832        "commitdiff" => \&git_commitdiff,
 833        "commitdiff_plain" => \&git_commitdiff_plain,
 834        "commit" => \&git_commit,
 835        "forks" => \&git_forks,
 836        "heads" => \&git_heads,
 837        "history" => \&git_history,
 838        "log" => \&git_log,
 839        "patch" => \&git_patch,
 840        "patches" => \&git_patches,
 841        "remotes" => \&git_remotes,
 842        "rss" => \&git_rss,
 843        "atom" => \&git_atom,
 844        "search" => \&git_search,
 845        "search_help" => \&git_search_help,
 846        "shortlog" => \&git_shortlog,
 847        "summary" => \&git_summary,
 848        "tag" => \&git_tag,
 849        "tags" => \&git_tags,
 850        "tree" => \&git_tree,
 851        "snapshot" => \&git_snapshot,
 852        "object" => \&git_object,
 853        # those below don't need $project
 854        "opml" => \&git_opml,
 855        "project_list" => \&git_project_list,
 856        "project_index" => \&git_project_index,
 857);
 858
 859# finally, we have the hash of allowed extra_options for the commands that
 860# allow them
 861our %allowed_options = (
 862        "--no-merges" => [ qw(rss atom log shortlog history) ],
 863);
 864
 865# fill %input_params with the CGI parameters. All values except for 'opt'
 866# should be single values, but opt can be an array. We should probably
 867# build an array of parameters that can be multi-valued, but since for the time
 868# being it's only this one, we just single it out
 869sub evaluate_query_params {
 870        our $cgi;
 871
 872        while (my ($name, $symbol) = each %cgi_param_mapping) {
 873                if ($symbol eq 'opt') {
 874                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 875                } else {
 876                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 877                }
 878        }
 879}
 880
 881# now read PATH_INFO and update the parameter list for missing parameters
 882sub evaluate_path_info {
 883        return if defined $input_params{'project'};
 884        return if !$path_info;
 885        $path_info =~ s,^/+,,;
 886        return if !$path_info;
 887
 888        # find which part of PATH_INFO is project
 889        my $project = $path_info;
 890        $project =~ s,/+$,,;
 891        while ($project && !check_head_link("$projectroot/$project")) {
 892                $project =~ s,/*[^/]*$,,;
 893        }
 894        return unless $project;
 895        $input_params{'project'} = $project;
 896
 897        # do not change any parameters if an action is given using the query string
 898        return if $input_params{'action'};
 899        $path_info =~ s,^\Q$project\E/*,,;
 900
 901        # next, check if we have an action
 902        my $action = $path_info;
 903        $action =~ s,/.*$,,;
 904        if (exists $actions{$action}) {
 905                $path_info =~ s,^$action/*,,;
 906                $input_params{'action'} = $action;
 907        }
 908
 909        # list of actions that want hash_base instead of hash, but can have no
 910        # pathname (f) parameter
 911        my @wants_base = (
 912                'tree',
 913                'history',
 914        );
 915
 916        # we want to catch, among others
 917        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 918        my ($parentrefname, $parentpathname, $refname, $pathname) =
 919                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 920
 921        # first, analyze the 'current' part
 922        if (defined $pathname) {
 923                # we got "branch:filename" or "branch:dir/"
 924                # we could use git_get_type(branch:pathname), but:
 925                # - it needs $git_dir
 926                # - it does a git() call
 927                # - the convention of terminating directories with a slash
 928                #   makes it superfluous
 929                # - embedding the action in the PATH_INFO would make it even
 930                #   more superfluous
 931                $pathname =~ s,^/+,,;
 932                if (!$pathname || substr($pathname, -1) eq "/") {
 933                        $input_params{'action'} ||= "tree";
 934                        $pathname =~ s,/$,,;
 935                } else {
 936                        # the default action depends on whether we had parent info
 937                        # or not
 938                        if ($parentrefname) {
 939                                $input_params{'action'} ||= "blobdiff_plain";
 940                        } else {
 941                                $input_params{'action'} ||= "blob_plain";
 942                        }
 943                }
 944                $input_params{'hash_base'} ||= $refname;
 945                $input_params{'file_name'} ||= $pathname;
 946        } elsif (defined $refname) {
 947                # we got "branch". In this case we have to choose if we have to
 948                # set hash or hash_base.
 949                #
 950                # Most of the actions without a pathname only want hash to be
 951                # set, except for the ones specified in @wants_base that want
 952                # hash_base instead. It should also be noted that hand-crafted
 953                # links having 'history' as an action and no pathname or hash
 954                # set will fail, but that happens regardless of PATH_INFO.
 955                if (defined $parentrefname) {
 956                        # if there is parent let the default be 'shortlog' action
 957                        # (for http://git.example.com/repo.git/A..B links); if there
 958                        # is no parent, dispatch will detect type of object and set
 959                        # action appropriately if required (if action is not set)
 960                        $input_params{'action'} ||= "shortlog";
 961                }
 962                if ($input_params{'action'} &&
 963                    grep { $_ eq $input_params{'action'} } @wants_base) {
 964                        $input_params{'hash_base'} ||= $refname;
 965                } else {
 966                        $input_params{'hash'} ||= $refname;
 967                }
 968        }
 969
 970        # next, handle the 'parent' part, if present
 971        if (defined $parentrefname) {
 972                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 973                # someproject/blobdiff/oldrev..newrev:/filename
 974                if ($parentpathname) {
 975                        $parentpathname =~ s,^/+,,;
 976                        $parentpathname =~ s,/$,,;
 977                        $input_params{'file_parent'} ||= $parentpathname;
 978                } else {
 979                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 980                }
 981                # we assume that hash_parent_base is wanted if a path was specified,
 982                # or if the action wants hash_base instead of hash
 983                if (defined $input_params{'file_parent'} ||
 984                        grep { $_ eq $input_params{'action'} } @wants_base) {
 985                        $input_params{'hash_parent_base'} ||= $parentrefname;
 986                } else {
 987                        $input_params{'hash_parent'} ||= $parentrefname;
 988                }
 989        }
 990
 991        # for the snapshot action, we allow URLs in the form
 992        # $project/snapshot/$hash.ext
 993        # where .ext determines the snapshot and gets removed from the
 994        # passed $refname to provide the $hash.
 995        #
 996        # To be able to tell that $refname includes the format extension, we
 997        # require the following two conditions to be satisfied:
 998        # - the hash input parameter MUST have been set from the $refname part
 999        #   of the URL (i.e. they must be equal)
1000        # - the snapshot format MUST NOT have been defined already (e.g. from
1001        #   CGI parameter sf)
1002        # It's also useless to try any matching unless $refname has a dot,
1003        # so we check for that too
1004        if (defined $input_params{'action'} &&
1005                $input_params{'action'} eq 'snapshot' &&
1006                defined $refname && index($refname, '.') != -1 &&
1007                $refname eq $input_params{'hash'} &&
1008                !defined $input_params{'snapshot_format'}) {
1009                # We loop over the known snapshot formats, checking for
1010                # extensions. Allowed extensions are both the defined suffix
1011                # (which includes the initial dot already) and the snapshot
1012                # format key itself, with a prepended dot
1013                while (my ($fmt, $opt) = each %known_snapshot_formats) {
1014                        my $hash = $refname;
1015                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1016                                next;
1017                        }
1018                        my $sfx = $1;
1019                        # a valid suffix was found, so set the snapshot format
1020                        # and reset the hash parameter
1021                        $input_params{'snapshot_format'} = $fmt;
1022                        $input_params{'hash'} = $hash;
1023                        # we also set the format suffix to the one requested
1024                        # in the URL: this way a request for e.g. .tgz returns
1025                        # a .tgz instead of a .tar.gz
1026                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1027                        last;
1028                }
1029        }
1030}
1031
1032our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1033     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1034     $searchtext, $search_regexp, $project_filter);
1035sub evaluate_and_validate_params {
1036        our $action = $input_params{'action'};
1037        if (defined $action) {
1038                if (!is_valid_action($action)) {
1039                        die_error(400, "Invalid action parameter");
1040                }
1041        }
1042
1043        # parameters which are pathnames
1044        our $project = $input_params{'project'};
1045        if (defined $project) {
1046                if (!is_valid_project($project)) {
1047                        undef $project;
1048                        die_error(404, "No such project");
1049                }
1050        }
1051
1052        our $project_filter = $input_params{'project_filter'};
1053        if (defined $project_filter) {
1054                if (!is_valid_pathname($project_filter)) {
1055                        die_error(404, "Invalid project_filter parameter");
1056                }
1057        }
1058
1059        our $file_name = $input_params{'file_name'};
1060        if (defined $file_name) {
1061                if (!is_valid_pathname($file_name)) {
1062                        die_error(400, "Invalid file parameter");
1063                }
1064        }
1065
1066        our $file_parent = $input_params{'file_parent'};
1067        if (defined $file_parent) {
1068                if (!is_valid_pathname($file_parent)) {
1069                        die_error(400, "Invalid file parent parameter");
1070                }
1071        }
1072
1073        # parameters which are refnames
1074        our $hash = $input_params{'hash'};
1075        if (defined $hash) {
1076                if (!is_valid_refname($hash)) {
1077                        die_error(400, "Invalid hash parameter");
1078                }
1079        }
1080
1081        our $hash_parent = $input_params{'hash_parent'};
1082        if (defined $hash_parent) {
1083                if (!is_valid_refname($hash_parent)) {
1084                        die_error(400, "Invalid hash parent parameter");
1085                }
1086        }
1087
1088        our $hash_base = $input_params{'hash_base'};
1089        if (defined $hash_base) {
1090                if (!is_valid_refname($hash_base)) {
1091                        die_error(400, "Invalid hash base parameter");
1092                }
1093        }
1094
1095        our @extra_options = @{$input_params{'extra_options'}};
1096        # @extra_options is always defined, since it can only be (currently) set from
1097        # CGI, and $cgi->param() returns the empty array in array context if the param
1098        # is not set
1099        foreach my $opt (@extra_options) {
1100                if (not exists $allowed_options{$opt}) {
1101                        die_error(400, "Invalid option parameter");
1102                }
1103                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1104                        die_error(400, "Invalid option parameter for this action");
1105                }
1106        }
1107
1108        our $hash_parent_base = $input_params{'hash_parent_base'};
1109        if (defined $hash_parent_base) {
1110                if (!is_valid_refname($hash_parent_base)) {
1111                        die_error(400, "Invalid hash parent base parameter");
1112                }
1113        }
1114
1115        # other parameters
1116        our $page = $input_params{'page'};
1117        if (defined $page) {
1118                if ($page =~ m/[^0-9]/) {
1119                        die_error(400, "Invalid page parameter");
1120                }
1121        }
1122
1123        our $searchtype = $input_params{'searchtype'};
1124        if (defined $searchtype) {
1125                if ($searchtype =~ m/[^a-z]/) {
1126                        die_error(400, "Invalid searchtype parameter");
1127                }
1128        }
1129
1130        our $search_use_regexp = $input_params{'search_use_regexp'};
1131
1132        our $searchtext = $input_params{'searchtext'};
1133        our $search_regexp = undef;
1134        if (defined $searchtext) {
1135                if (length($searchtext) < 2) {
1136                        die_error(403, "At least two characters are required for search parameter");
1137                }
1138                if ($search_use_regexp) {
1139                        $search_regexp = $searchtext;
1140                        if (!eval { qr/$search_regexp/; 1; }) {
1141                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1142                                die_error(400, "Invalid search regexp '$search_regexp'",
1143                                          esc_html($error));
1144                        }
1145                } else {
1146                        $search_regexp = quotemeta $searchtext;
1147                }
1148        }
1149}
1150
1151# path to the current git repository
1152our $git_dir;
1153sub evaluate_git_dir {
1154        our $git_dir = "$projectroot/$project" if $project;
1155}
1156
1157our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1158sub configure_gitweb_features {
1159        # list of supported snapshot formats
1160        our @snapshot_fmts = gitweb_get_feature('snapshot');
1161        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1162
1163        # check that the avatar feature is set to a known provider name,
1164        # and for each provider check if the dependencies are satisfied.
1165        # if the provider name is invalid or the dependencies are not met,
1166        # reset $git_avatar to the empty string.
1167        our ($git_avatar) = gitweb_get_feature('avatar');
1168        if ($git_avatar eq 'gravatar') {
1169                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1170        } elsif ($git_avatar eq 'picon') {
1171                # no dependencies
1172        } else {
1173                $git_avatar = '';
1174        }
1175
1176        our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1177        @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1178}
1179
1180sub get_branch_refs {
1181        return ('heads', @extra_branch_refs);
1182}
1183
1184# custom error handler: 'die <message>' is Internal Server Error
1185sub handle_errors_html {
1186        my $msg = shift; # it is already HTML escaped
1187
1188        # to avoid infinite loop where error occurs in die_error,
1189        # change handler to default handler, disabling handle_errors_html
1190        set_message("Error occurred when inside die_error:\n$msg");
1191
1192        # you cannot jump out of die_error when called as error handler;
1193        # the subroutine set via CGI::Carp::set_message is called _after_
1194        # HTTP headers are already written, so it cannot write them itself
1195        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1196}
1197set_message(\&handle_errors_html);
1198
1199# dispatch
1200sub dispatch {
1201        if (!defined $action) {
1202                if (defined $hash) {
1203                        $action = git_get_type($hash);
1204                        $action or die_error(404, "Object does not exist");
1205                } elsif (defined $hash_base && defined $file_name) {
1206                        $action = git_get_type("$hash_base:$file_name");
1207                        $action or die_error(404, "File or directory does not exist");
1208                } elsif (defined $project) {
1209                        $action = 'summary';
1210                } else {
1211                        $action = 'project_list';
1212                }
1213        }
1214        if (!defined($actions{$action})) {
1215                die_error(400, "Unknown action");
1216        }
1217        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1218            !$project) {
1219                die_error(400, "Project needed");
1220        }
1221        $actions{$action}->();
1222}
1223
1224sub reset_timer {
1225        our $t0 = [ gettimeofday() ]
1226                if defined $t0;
1227        our $number_of_git_cmds = 0;
1228}
1229
1230our $first_request = 1;
1231sub run_request {
1232        reset_timer();
1233
1234        evaluate_uri();
1235        if ($first_request) {
1236                evaluate_gitweb_config();
1237                evaluate_git_version();
1238        }
1239        if ($per_request_config) {
1240                if (ref($per_request_config) eq 'CODE') {
1241                        $per_request_config->();
1242                } elsif (!$first_request) {
1243                        evaluate_gitweb_config();
1244                }
1245        }
1246        check_loadavg();
1247
1248        # $projectroot and $projects_list might be set in gitweb config file
1249        $projects_list ||= $projectroot;
1250
1251        evaluate_query_params();
1252        evaluate_path_info();
1253        evaluate_and_validate_params();
1254        evaluate_git_dir();
1255
1256        configure_gitweb_features();
1257
1258        dispatch();
1259}
1260
1261our $is_last_request = sub { 1 };
1262our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1263our $CGI = 'CGI';
1264our $cgi;
1265sub configure_as_fcgi {
1266        require CGI::Fast;
1267        our $CGI = 'CGI::Fast';
1268
1269        my $request_number = 0;
1270        # let each child service 100 requests
1271        our $is_last_request = sub { ++$request_number > 100 };
1272}
1273sub evaluate_argv {
1274        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1275        configure_as_fcgi()
1276                if $script_name =~ /\.fcgi$/;
1277
1278        return unless (@ARGV);
1279
1280        require Getopt::Long;
1281        Getopt::Long::GetOptions(
1282                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1283                'nproc|n=i' => sub {
1284                        my ($arg, $val) = @_;
1285                        return unless eval { require FCGI::ProcManager; 1; };
1286                        my $proc_manager = FCGI::ProcManager->new({
1287                                n_processes => $val,
1288                        });
1289                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1290                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1291                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1292                },
1293        );
1294}
1295
1296sub run {
1297        evaluate_argv();
1298
1299        $first_request = 1;
1300        $pre_listen_hook->()
1301                if $pre_listen_hook;
1302
1303 REQUEST:
1304        while ($cgi = $CGI->new()) {
1305                $pre_dispatch_hook->()
1306                        if $pre_dispatch_hook;
1307
1308                run_request();
1309
1310                $post_dispatch_hook->()
1311                        if $post_dispatch_hook;
1312                $first_request = 0;
1313
1314                last REQUEST if ($is_last_request->());
1315        }
1316
1317 DONE_GITWEB:
1318        1;
1319}
1320
1321run();
1322
1323if (defined caller) {
1324        # wrapped in a subroutine processing requests,
1325        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1326        return;
1327} else {
1328        # pure CGI script, serving single request
1329        exit;
1330}
1331
1332## ======================================================================
1333## action links
1334
1335# possible values of extra options
1336# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1337# -replay => 1      - start from a current view (replay with modifications)
1338# -path_info => 0|1 - don't use/use path_info URL (if possible)
1339# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1340sub href {
1341        my %params = @_;
1342        # default is to use -absolute url() i.e. $my_uri
1343        my $href = $params{-full} ? $my_url : $my_uri;
1344
1345        # implicit -replay, must be first of implicit params
1346        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1347
1348        $params{'project'} = $project unless exists $params{'project'};
1349
1350        if ($params{-replay}) {
1351                while (my ($name, $symbol) = each %cgi_param_mapping) {
1352                        if (!exists $params{$name}) {
1353                                $params{$name} = $input_params{$name};
1354                        }
1355                }
1356        }
1357
1358        my $use_pathinfo = gitweb_check_feature('pathinfo');
1359        if (defined $params{'project'} &&
1360            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1361                # try to put as many parameters as possible in PATH_INFO:
1362                #   - project name
1363                #   - action
1364                #   - hash_parent or hash_parent_base:/file_parent
1365                #   - hash or hash_base:/filename
1366                #   - the snapshot_format as an appropriate suffix
1367
1368                # When the script is the root DirectoryIndex for the domain,
1369                # $href here would be something like http://gitweb.example.com/
1370                # Thus, we strip any trailing / from $href, to spare us double
1371                # slashes in the final URL
1372                $href =~ s,/$,,;
1373
1374                # Then add the project name, if present
1375                $href .= "/".esc_path_info($params{'project'});
1376                delete $params{'project'};
1377
1378                # since we destructively absorb parameters, we keep this
1379                # boolean that remembers if we're handling a snapshot
1380                my $is_snapshot = $params{'action'} eq 'snapshot';
1381
1382                # Summary just uses the project path URL, any other action is
1383                # added to the URL
1384                if (defined $params{'action'}) {
1385                        $href .= "/".esc_path_info($params{'action'})
1386                                unless $params{'action'} eq 'summary';
1387                        delete $params{'action'};
1388                }
1389
1390                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1391                # stripping nonexistent or useless pieces
1392                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1393                        || $params{'hash_parent'} || $params{'hash'});
1394                if (defined $params{'hash_base'}) {
1395                        if (defined $params{'hash_parent_base'}) {
1396                                $href .= esc_path_info($params{'hash_parent_base'});
1397                                # skip the file_parent if it's the same as the file_name
1398                                if (defined $params{'file_parent'}) {
1399                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1400                                                delete $params{'file_parent'};
1401                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1402                                                $href .= ":/".esc_path_info($params{'file_parent'});
1403                                                delete $params{'file_parent'};
1404                                        }
1405                                }
1406                                $href .= "..";
1407                                delete $params{'hash_parent'};
1408                                delete $params{'hash_parent_base'};
1409                        } elsif (defined $params{'hash_parent'}) {
1410                                $href .= esc_path_info($params{'hash_parent'}). "..";
1411                                delete $params{'hash_parent'};
1412                        }
1413
1414                        $href .= esc_path_info($params{'hash_base'});
1415                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1416                                $href .= ":/".esc_path_info($params{'file_name'});
1417                                delete $params{'file_name'};
1418                        }
1419                        delete $params{'hash'};
1420                        delete $params{'hash_base'};
1421                } elsif (defined $params{'hash'}) {
1422                        $href .= esc_path_info($params{'hash'});
1423                        delete $params{'hash'};
1424                }
1425
1426                # If the action was a snapshot, we can absorb the
1427                # snapshot_format parameter too
1428                if ($is_snapshot) {
1429                        my $fmt = $params{'snapshot_format'};
1430                        # snapshot_format should always be defined when href()
1431                        # is called, but just in case some code forgets, we
1432                        # fall back to the default
1433                        $fmt ||= $snapshot_fmts[0];
1434                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1435                        delete $params{'snapshot_format'};
1436                }
1437        }
1438
1439        # now encode the parameters explicitly
1440        my @result = ();
1441        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1442                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1443                if (defined $params{$name}) {
1444                        if (ref($params{$name}) eq "ARRAY") {
1445                                foreach my $par (@{$params{$name}}) {
1446                                        push @result, $symbol . "=" . esc_param($par);
1447                                }
1448                        } else {
1449                                push @result, $symbol . "=" . esc_param($params{$name});
1450                        }
1451                }
1452        }
1453        $href .= "?" . join(';', @result) if scalar @result;
1454
1455        # final transformation: trailing spaces must be escaped (URI-encoded)
1456        $href =~ s/(\s+)$/CGI::escape($1)/e;
1457
1458        if ($params{-anchor}) {
1459                $href .= "#".esc_param($params{-anchor});
1460        }
1461
1462        return $href;
1463}
1464
1465
1466## ======================================================================
1467## validation, quoting/unquoting and escaping
1468
1469sub is_valid_action {
1470        my $input = shift;
1471        return undef unless exists $actions{$input};
1472        return 1;
1473}
1474
1475sub is_valid_project {
1476        my $input = shift;
1477
1478        return unless defined $input;
1479        if (!is_valid_pathname($input) ||
1480                !(-d "$projectroot/$input") ||
1481                !check_export_ok("$projectroot/$input") ||
1482                ($strict_export && !project_in_list($input))) {
1483                return undef;
1484        } else {
1485                return 1;
1486        }
1487}
1488
1489sub is_valid_pathname {
1490        my $input = shift;
1491
1492        return undef unless defined $input;
1493        # no '.' or '..' as elements of path, i.e. no '.' or '..'
1494        # at the beginning, at the end, and between slashes.
1495        # also this catches doubled slashes
1496        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1497                return undef;
1498        }
1499        # no null characters
1500        if ($input =~ m!\0!) {
1501                return undef;
1502        }
1503        return 1;
1504}
1505
1506sub is_valid_ref_format {
1507        my $input = shift;
1508
1509        return undef unless defined $input;
1510        # restrictions on ref name according to git-check-ref-format
1511        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1512                return undef;
1513        }
1514        return 1;
1515}
1516
1517sub is_valid_refname {
1518        my $input = shift;
1519
1520        return undef unless defined $input;
1521        # textual hashes are O.K.
1522        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1523                return 1;
1524        }
1525        # it must be correct pathname
1526        is_valid_pathname($input) or return undef;
1527        # check git-check-ref-format restrictions
1528        is_valid_ref_format($input) or return undef;
1529        return 1;
1530}
1531
1532# decode sequences of octets in utf8 into Perl's internal form,
1533# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1534# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1535sub to_utf8 {
1536        my $str = shift;
1537        return undef unless defined $str;
1538
1539        if (utf8::is_utf8($str) || utf8::decode($str)) {
1540                return $str;
1541        } else {
1542                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1543        }
1544}
1545
1546# quote unsafe chars, but keep the slash, even when it's not
1547# correct, but quoted slashes look too horrible in bookmarks
1548sub esc_param {
1549        my $str = shift;
1550        return undef unless defined $str;
1551        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1552        $str =~ s/ /\+/g;
1553        return $str;
1554}
1555
1556# the quoting rules for path_info fragment are slightly different
1557sub esc_path_info {
1558        my $str = shift;
1559        return undef unless defined $str;
1560
1561        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1562        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1563
1564        return $str;
1565}
1566
1567# quote unsafe chars in whole URL, so some characters cannot be quoted
1568sub esc_url {
1569        my $str = shift;
1570        return undef unless defined $str;
1571        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1572        $str =~ s/ /\+/g;
1573        return $str;
1574}
1575
1576# quote unsafe characters in HTML attributes
1577sub esc_attr {
1578
1579        # for XHTML conformance escaping '"' to '&quot;' is not enough
1580        return esc_html(@_);
1581}
1582
1583# replace invalid utf8 character with SUBSTITUTION sequence
1584sub esc_html {
1585        my $str = shift;
1586        my %opts = @_;
1587
1588        return undef unless defined $str;
1589
1590        $str = to_utf8($str);
1591        $str = $cgi->escapeHTML($str);
1592        if ($opts{'-nbsp'}) {
1593                $str =~ s/ /&nbsp;/g;
1594        }
1595        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1596        return $str;
1597}
1598
1599# quote control characters and escape filename to HTML
1600sub esc_path {
1601        my $str = shift;
1602        my %opts = @_;
1603
1604        return undef unless defined $str;
1605
1606        $str = to_utf8($str);
1607        $str = $cgi->escapeHTML($str);
1608        if ($opts{'-nbsp'}) {
1609                $str =~ s/ /&nbsp;/g;
1610        }
1611        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1612        return $str;
1613}
1614
1615# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1616sub sanitize {
1617        my $str = shift;
1618
1619        return undef unless defined $str;
1620
1621        $str = to_utf8($str);
1622        $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1623        return $str;
1624}
1625
1626# Make control characters "printable", using character escape codes (CEC)
1627sub quot_cec {
1628        my $cntrl = shift;
1629        my %opts = @_;
1630        my %es = ( # character escape codes, aka escape sequences
1631                "\t" => '\t',   # tab            (HT)
1632                "\n" => '\n',   # line feed      (LF)
1633                "\r" => '\r',   # carrige return (CR)
1634                "\f" => '\f',   # form feed      (FF)
1635                "\b" => '\b',   # backspace      (BS)
1636                "\a" => '\a',   # alarm (bell)   (BEL)
1637                "\e" => '\e',   # escape         (ESC)
1638                "\013" => '\v', # vertical tab   (VT)
1639                "\000" => '\0', # nul character  (NUL)
1640        );
1641        my $chr = ( (exists $es{$cntrl})
1642                    ? $es{$cntrl}
1643                    : sprintf('\%2x', ord($cntrl)) );
1644        if ($opts{-nohtml}) {
1645                return $chr;
1646        } else {
1647                return "<span class=\"cntrl\">$chr</span>";
1648        }
1649}
1650
1651# Alternatively use unicode control pictures codepoints,
1652# Unicode "printable representation" (PR)
1653sub quot_upr {
1654        my $cntrl = shift;
1655        my %opts = @_;
1656
1657        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1658        if ($opts{-nohtml}) {
1659                return $chr;
1660        } else {
1661                return "<span class=\"cntrl\">$chr</span>";
1662        }
1663}
1664
1665# git may return quoted and escaped filenames
1666sub unquote {
1667        my $str = shift;
1668
1669        sub unq {
1670                my $seq = shift;
1671                my %es = ( # character escape codes, aka escape sequences
1672                        't' => "\t",   # tab            (HT, TAB)
1673                        'n' => "\n",   # newline        (NL)
1674                        'r' => "\r",   # return         (CR)
1675                        'f' => "\f",   # form feed      (FF)
1676                        'b' => "\b",   # backspace      (BS)
1677                        'a' => "\a",   # alarm (bell)   (BEL)
1678                        'e' => "\e",   # escape         (ESC)
1679                        'v' => "\013", # vertical tab   (VT)
1680                );
1681
1682                if ($seq =~ m/^[0-7]{1,3}$/) {
1683                        # octal char sequence
1684                        return chr(oct($seq));
1685                } elsif (exists $es{$seq}) {
1686                        # C escape sequence, aka character escape code
1687                        return $es{$seq};
1688                }
1689                # quoted ordinary character
1690                return $seq;
1691        }
1692
1693        if ($str =~ m/^"(.*)"$/) {
1694                # needs unquoting
1695                $str = $1;
1696                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1697        }
1698        return $str;
1699}
1700
1701# escape tabs (convert tabs to spaces)
1702sub untabify {
1703        my $line = shift;
1704
1705        while ((my $pos = index($line, "\t")) != -1) {
1706                if (my $count = (8 - ($pos % 8))) {
1707                        my $spaces = ' ' x $count;
1708                        $line =~ s/\t/$spaces/;
1709                }
1710        }
1711
1712        return $line;
1713}
1714
1715sub project_in_list {
1716        my $project = shift;
1717        my @list = git_get_projects_list();
1718        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1719}
1720
1721## ----------------------------------------------------------------------
1722## HTML aware string manipulation
1723
1724# Try to chop given string on a word boundary between position
1725# $len and $len+$add_len. If there is no word boundary there,
1726# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1727# (marking chopped part) would be longer than given string.
1728sub chop_str {
1729        my $str = shift;
1730        my $len = shift;
1731        my $add_len = shift || 10;
1732        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1733
1734        # Make sure perl knows it is utf8 encoded so we don't
1735        # cut in the middle of a utf8 multibyte char.
1736        $str = to_utf8($str);
1737
1738        # allow only $len chars, but don't cut a word if it would fit in $add_len
1739        # if it doesn't fit, cut it if it's still longer than the dots we would add
1740        # remove chopped character entities entirely
1741
1742        # when chopping in the middle, distribute $len into left and right part
1743        # return early if chopping wouldn't make string shorter
1744        if ($where eq 'center') {
1745                return $str if ($len + 5 >= length($str)); # filler is length 5
1746                $len = int($len/2);
1747        } else {
1748                return $str if ($len + 4 >= length($str)); # filler is length 4
1749        }
1750
1751        # regexps: ending and beginning with word part up to $add_len
1752        my $endre = qr/.{$len}\w{0,$add_len}/;
1753        my $begre = qr/\w{0,$add_len}.{$len}/;
1754
1755        if ($where eq 'left') {
1756                $str =~ m/^(.*?)($begre)$/;
1757                my ($lead, $body) = ($1, $2);
1758                if (length($lead) > 4) {
1759                        $lead = " ...";
1760                }
1761                return "$lead$body";
1762
1763        } elsif ($where eq 'center') {
1764                $str =~ m/^($endre)(.*)$/;
1765                my ($left, $str)  = ($1, $2);
1766                $str =~ m/^(.*?)($begre)$/;
1767                my ($mid, $right) = ($1, $2);
1768                if (length($mid) > 5) {
1769                        $mid = " ... ";
1770                }
1771                return "$left$mid$right";
1772
1773        } else {
1774                $str =~ m/^($endre)(.*)$/;
1775                my $body = $1;
1776                my $tail = $2;
1777                if (length($tail) > 4) {
1778                        $tail = "... ";
1779                }
1780                return "$body$tail";
1781        }
1782}
1783
1784# takes the same arguments as chop_str, but also wraps a <span> around the
1785# result with a title attribute if it does get chopped. Additionally, the
1786# string is HTML-escaped.
1787sub chop_and_escape_str {
1788        my ($str) = @_;
1789
1790        my $chopped = chop_str(@_);
1791        $str = to_utf8($str);
1792        if ($chopped eq $str) {
1793                return esc_html($chopped);
1794        } else {
1795                $str =~ s/[[:cntrl:]]/?/g;
1796                return $cgi->span({-title=>$str}, esc_html($chopped));
1797        }
1798}
1799
1800# Highlight selected fragments of string, using given CSS class,
1801# and escape HTML.  It is assumed that fragments do not overlap.
1802# Regions are passed as list of pairs (array references).
1803#
1804# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1805# '<span class="mark">foo</span>bar'
1806sub esc_html_hl_regions {
1807        my ($str, $css_class, @sel) = @_;
1808        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1809        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1810        return esc_html($str, %opts) unless @sel;
1811
1812        my $out = '';
1813        my $pos = 0;
1814
1815        for my $s (@sel) {
1816                my ($begin, $end) = @$s;
1817
1818                # Don't create empty <span> elements.
1819                next if $end <= $begin;
1820
1821                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1822                                       %opts);
1823
1824                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1825                        if ($begin - $pos > 0);
1826                $out .= $cgi->span({-class => $css_class}, $escaped);
1827
1828                $pos = $end;
1829        }
1830        $out .= esc_html(substr($str, $pos), %opts)
1831                if ($pos < length($str));
1832
1833        return $out;
1834}
1835
1836# return positions of beginning and end of each match
1837sub matchpos_list {
1838        my ($str, $regexp) = @_;
1839        return unless (defined $str && defined $regexp);
1840
1841        my @matches;
1842        while ($str =~ /$regexp/g) {
1843                push @matches, [$-[0], $+[0]];
1844        }
1845        return @matches;
1846}
1847
1848# highlight match (if any), and escape HTML
1849sub esc_html_match_hl {
1850        my ($str, $regexp) = @_;
1851        return esc_html($str) unless defined $regexp;
1852
1853        my @matches = matchpos_list($str, $regexp);
1854        return esc_html($str) unless @matches;
1855
1856        return esc_html_hl_regions($str, 'match', @matches);
1857}
1858
1859
1860# highlight match (if any) of shortened string, and escape HTML
1861sub esc_html_match_hl_chopped {
1862        my ($str, $chopped, $regexp) = @_;
1863        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1864
1865        my @matches = matchpos_list($str, $regexp);
1866        return esc_html($chopped) unless @matches;
1867
1868        # filter matches so that we mark chopped string
1869        my $tail = "... "; # see chop_str
1870        unless ($chopped =~ s/\Q$tail\E$//) {
1871                $tail = '';
1872        }
1873        my $chop_len = length($chopped);
1874        my $tail_len = length($tail);
1875        my @filtered;
1876
1877        for my $m (@matches) {
1878                if ($m->[0] > $chop_len) {
1879                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1880                        last;
1881                } elsif ($m->[1] > $chop_len) {
1882                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1883                        last;
1884                }
1885                push @filtered, $m;
1886        }
1887
1888        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1889}
1890
1891## ----------------------------------------------------------------------
1892## functions returning short strings
1893
1894# CSS class for given age value (in seconds)
1895sub age_class {
1896        my $age = shift;
1897
1898        if (!defined $age) {
1899                return "noage";
1900        } elsif ($age < 60*60*2) {
1901                return "age0";
1902        } elsif ($age < 60*60*24*2) {
1903                return "age1";
1904        } else {
1905                return "age2";
1906        }
1907}
1908
1909# convert age in seconds to "nn units ago" string
1910sub age_string {
1911        my $age = shift;
1912        my $age_str;
1913
1914        if ($age > 60*60*24*365*2) {
1915                $age_str = (int $age/60/60/24/365);
1916                $age_str .= " years ago";
1917        } elsif ($age > 60*60*24*(365/12)*2) {
1918                $age_str = int $age/60/60/24/(365/12);
1919                $age_str .= " months ago";
1920        } elsif ($age > 60*60*24*7*2) {
1921                $age_str = int $age/60/60/24/7;
1922                $age_str .= " weeks ago";
1923        } elsif ($age > 60*60*24*2) {
1924                $age_str = int $age/60/60/24;
1925                $age_str .= " days ago";
1926        } elsif ($age > 60*60*2) {
1927                $age_str = int $age/60/60;
1928                $age_str .= " hours ago";
1929        } elsif ($age > 60*2) {
1930                $age_str = int $age/60;
1931                $age_str .= " min ago";
1932        } elsif ($age > 2) {
1933                $age_str = int $age;
1934                $age_str .= " sec ago";
1935        } else {
1936                $age_str .= " right now";
1937        }
1938        return $age_str;
1939}
1940
1941use constant {
1942        S_IFINVALID => 0030000,
1943        S_IFGITLINK => 0160000,
1944};
1945
1946# submodule/subproject, a commit object reference
1947sub S_ISGITLINK {
1948        my $mode = shift;
1949
1950        return (($mode & S_IFMT) == S_IFGITLINK)
1951}
1952
1953# convert file mode in octal to symbolic file mode string
1954sub mode_str {
1955        my $mode = oct shift;
1956
1957        if (S_ISGITLINK($mode)) {
1958                return 'm---------';
1959        } elsif (S_ISDIR($mode & S_IFMT)) {
1960                return 'drwxr-xr-x';
1961        } elsif (S_ISLNK($mode)) {
1962                return 'lrwxrwxrwx';
1963        } elsif (S_ISREG($mode)) {
1964                # git cares only about the executable bit
1965                if ($mode & S_IXUSR) {
1966                        return '-rwxr-xr-x';
1967                } else {
1968                        return '-rw-r--r--';
1969                };
1970        } else {
1971                return '----------';
1972        }
1973}
1974
1975# convert file mode in octal to file type string
1976sub file_type {
1977        my $mode = shift;
1978
1979        if ($mode !~ m/^[0-7]+$/) {
1980                return $mode;
1981        } else {
1982                $mode = oct $mode;
1983        }
1984
1985        if (S_ISGITLINK($mode)) {
1986                return "submodule";
1987        } elsif (S_ISDIR($mode & S_IFMT)) {
1988                return "directory";
1989        } elsif (S_ISLNK($mode)) {
1990                return "symlink";
1991        } elsif (S_ISREG($mode)) {
1992                return "file";
1993        } else {
1994                return "unknown";
1995        }
1996}
1997
1998# convert file mode in octal to file type description string
1999sub file_type_long {
2000        my $mode = shift;
2001
2002        if ($mode !~ m/^[0-7]+$/) {
2003                return $mode;
2004        } else {
2005                $mode = oct $mode;
2006        }
2007
2008        if (S_ISGITLINK($mode)) {
2009                return "submodule";
2010        } elsif (S_ISDIR($mode & S_IFMT)) {
2011                return "directory";
2012        } elsif (S_ISLNK($mode)) {
2013                return "symlink";
2014        } elsif (S_ISREG($mode)) {
2015                if ($mode & S_IXUSR) {
2016                        return "executable";
2017                } else {
2018                        return "file";
2019                };
2020        } else {
2021                return "unknown";
2022        }
2023}
2024
2025
2026## ----------------------------------------------------------------------
2027## functions returning short HTML fragments, or transforming HTML fragments
2028## which don't belong to other sections
2029
2030# format line of commit message.
2031sub format_log_line_html {
2032        my $line = shift;
2033
2034        $line = esc_html($line, -nbsp=>1);
2035        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2036                $cgi->a({-href => href(action=>"object", hash=>$1),
2037                                        -class => "text"}, $1);
2038        }eg;
2039
2040        return $line;
2041}
2042
2043# format marker of refs pointing to given object
2044
2045# the destination action is chosen based on object type and current context:
2046# - for annotated tags, we choose the tag view unless it's the current view
2047#   already, in which case we go to shortlog view
2048# - for other refs, we keep the current view if we're in history, shortlog or
2049#   log view, and select shortlog otherwise
2050sub format_ref_marker {
2051        my ($refs, $id) = @_;
2052        my $markers = '';
2053
2054        if (defined $refs->{$id}) {
2055                foreach my $ref (@{$refs->{$id}}) {
2056                        # this code exploits the fact that non-lightweight tags are the
2057                        # only indirect objects, and that they are the only objects for which
2058                        # we want to use tag instead of shortlog as action
2059                        my ($type, $name) = qw();
2060                        my $indirect = ($ref =~ s/\^\{\}$//);
2061                        # e.g. tags/v2.6.11 or heads/next
2062                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
2063                                $type = $1;
2064                                $name = $2;
2065                        } else {
2066                                $type = "ref";
2067                                $name = $ref;
2068                        }
2069
2070                        my $class = $type;
2071                        $class .= " indirect" if $indirect;
2072
2073                        my $dest_action = "shortlog";
2074
2075                        if ($indirect) {
2076                                $dest_action = "tag" unless $action eq "tag";
2077                        } elsif ($action =~ /^(history|(short)?log)$/) {
2078                                $dest_action = $action;
2079                        }
2080
2081                        my $dest = "";
2082                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2083                        $dest .= $ref;
2084
2085                        my $link = $cgi->a({
2086                                -href => href(
2087                                        action=>$dest_action,
2088                                        hash=>$dest
2089                                )}, $name);
2090
2091                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2092                                $link . "</span>";
2093                }
2094        }
2095
2096        if ($markers) {
2097                return ' <span class="refs">'. $markers . '</span>';
2098        } else {
2099                return "";
2100        }
2101}
2102
2103# format, perhaps shortened and with markers, title line
2104sub format_subject_html {
2105        my ($long, $short, $href, $extra) = @_;
2106        $extra = '' unless defined($extra);
2107
2108        if (length($short) < length($long)) {
2109                $long =~ s/[[:cntrl:]]/?/g;
2110                return $cgi->a({-href => $href, -class => "list subject",
2111                                -title => to_utf8($long)},
2112                       esc_html($short)) . $extra;
2113        } else {
2114                return $cgi->a({-href => $href, -class => "list subject"},
2115                       esc_html($long)) . $extra;
2116        }
2117}
2118
2119# Rather than recomputing the url for an email multiple times, we cache it
2120# after the first hit. This gives a visible benefit in views where the avatar
2121# for the same email is used repeatedly (e.g. shortlog).
2122# The cache is shared by all avatar engines (currently gravatar only), which
2123# are free to use it as preferred. Since only one avatar engine is used for any
2124# given page, there's no risk for cache conflicts.
2125our %avatar_cache = ();
2126
2127# Compute the picon url for a given email, by using the picon search service over at
2128# http://www.cs.indiana.edu/picons/search.html
2129sub picon_url {
2130        my $email = lc shift;
2131        if (!$avatar_cache{$email}) {
2132                my ($user, $domain) = split('@', $email);
2133                $avatar_cache{$email} =
2134                        "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2135                        "$domain/$user/" .
2136                        "users+domains+unknown/up/single";
2137        }
2138        return $avatar_cache{$email};
2139}
2140
2141# Compute the gravatar url for a given email, if it's not in the cache already.
2142# Gravatar stores only the part of the URL before the size, since that's the
2143# one computationally more expensive. This also allows reuse of the cache for
2144# different sizes (for this particular engine).
2145sub gravatar_url {
2146        my $email = lc shift;
2147        my $size = shift;
2148        $avatar_cache{$email} ||=
2149                "//www.gravatar.com/avatar/" .
2150                        Digest::MD5::md5_hex($email) . "?s=";
2151        return $avatar_cache{$email} . $size;
2152}
2153
2154# Insert an avatar for the given $email at the given $size if the feature
2155# is enabled.
2156sub git_get_avatar {
2157        my ($email, %opts) = @_;
2158        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2159        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2160        $opts{-size} ||= 'default';
2161        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2162        my $url = "";
2163        if ($git_avatar eq 'gravatar') {
2164                $url = gravatar_url($email, $size);
2165        } elsif ($git_avatar eq 'picon') {
2166                $url = picon_url($email);
2167        }
2168        # Other providers can be added by extending the if chain, defining $url
2169        # as needed. If no variant puts something in $url, we assume avatars
2170        # are completely disabled/unavailable.
2171        if ($url) {
2172                return $pre_white .
2173                       "<img width=\"$size\" " .
2174                            "class=\"avatar\" " .
2175                            "src=\"".esc_url($url)."\" " .
2176                            "alt=\"\" " .
2177                       "/>" . $post_white;
2178        } else {
2179                return "";
2180        }
2181}
2182
2183sub format_search_author {
2184        my ($author, $searchtype, $displaytext) = @_;
2185        my $have_search = gitweb_check_feature('search');
2186
2187        if ($have_search) {
2188                my $performed = "";
2189                if ($searchtype eq 'author') {
2190                        $performed = "authored";
2191                } elsif ($searchtype eq 'committer') {
2192                        $performed = "committed";
2193                }
2194
2195                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2196                                searchtext=>$author,
2197                                searchtype=>$searchtype), class=>"list",
2198                                title=>"Search for commits $performed by $author"},
2199                                $displaytext);
2200
2201        } else {
2202                return $displaytext;
2203        }
2204}
2205
2206# format the author name of the given commit with the given tag
2207# the author name is chopped and escaped according to the other
2208# optional parameters (see chop_str).
2209sub format_author_html {
2210        my $tag = shift;
2211        my $co = shift;
2212        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2213        return "<$tag class=\"author\">" .
2214               format_search_author($co->{'author_name'}, "author",
2215                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2216                       $author) .
2217               "</$tag>";
2218}
2219
2220# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2221sub format_git_diff_header_line {
2222        my $line = shift;
2223        my $diffinfo = shift;
2224        my ($from, $to) = @_;
2225
2226        if ($diffinfo->{'nparents'}) {
2227                # combined diff
2228                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2229                if ($to->{'href'}) {
2230                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2231                                         esc_path($to->{'file'}));
2232                } else { # file was deleted (no href)
2233                        $line .= esc_path($to->{'file'});
2234                }
2235        } else {
2236                # "ordinary" diff
2237                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2238                if ($from->{'href'}) {
2239                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2240                                         'a/' . esc_path($from->{'file'}));
2241                } else { # file was added (no href)
2242                        $line .= 'a/' . esc_path($from->{'file'});
2243                }
2244                $line .= ' ';
2245                if ($to->{'href'}) {
2246                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2247                                         'b/' . esc_path($to->{'file'}));
2248                } else { # file was deleted
2249                        $line .= 'b/' . esc_path($to->{'file'});
2250                }
2251        }
2252
2253        return "<div class=\"diff header\">$line</div>\n";
2254}
2255
2256# format extended diff header line, before patch itself
2257sub format_extended_diff_header_line {
2258        my $line = shift;
2259        my $diffinfo = shift;
2260        my ($from, $to) = @_;
2261
2262        # match <path>
2263        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2264                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2265                                       esc_path($from->{'file'}));
2266        }
2267        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2268                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2269                                 esc_path($to->{'file'}));
2270        }
2271        # match single <mode>
2272        if ($line =~ m/\s(\d{6})$/) {
2273                $line .= '<span class="info"> (' .
2274                         file_type_long($1) .
2275                         ')</span>';
2276        }
2277        # match <hash>
2278        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2279                # can match only for combined diff
2280                $line = 'index ';
2281                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2282                        if ($from->{'href'}[$i]) {
2283                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2284                                                  -class=>"hash"},
2285                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2286                        } else {
2287                                $line .= '0' x 7;
2288                        }
2289                        # separator
2290                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2291                }
2292                $line .= '..';
2293                if ($to->{'href'}) {
2294                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2295                                         substr($diffinfo->{'to_id'},0,7));
2296                } else {
2297                        $line .= '0' x 7;
2298                }
2299
2300        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2301                # can match only for ordinary diff
2302                my ($from_link, $to_link);
2303                if ($from->{'href'}) {
2304                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2305                                             substr($diffinfo->{'from_id'},0,7));
2306                } else {
2307                        $from_link = '0' x 7;
2308                }
2309                if ($to->{'href'}) {
2310                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2311                                           substr($diffinfo->{'to_id'},0,7));
2312                } else {
2313                        $to_link = '0' x 7;
2314                }
2315                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2316                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2317        }
2318
2319        return $line . "<br/>\n";
2320}
2321
2322# format from-file/to-file diff header
2323sub format_diff_from_to_header {
2324        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2325        my $line;
2326        my $result = '';
2327
2328        $line = $from_line;
2329        #assert($line =~ m/^---/) if DEBUG;
2330        # no extra formatting for "^--- /dev/null"
2331        if (! $diffinfo->{'nparents'}) {
2332                # ordinary (single parent) diff
2333                if ($line =~ m!^--- "?a/!) {
2334                        if ($from->{'href'}) {
2335                                $line = '--- a/' .
2336                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2337                                                esc_path($from->{'file'}));
2338                        } else {
2339                                $line = '--- a/' .
2340                                        esc_path($from->{'file'});
2341                        }
2342                }
2343                $result .= qq!<div class="diff from_file">$line</div>\n!;
2344
2345        } else {
2346                # combined diff (merge commit)
2347                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2348                        if ($from->{'href'}[$i]) {
2349                                $line = '--- ' .
2350                                        $cgi->a({-href=>href(action=>"blobdiff",
2351                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2352                                                             hash_parent_base=>$parents[$i],
2353                                                             file_parent=>$from->{'file'}[$i],
2354                                                             hash=>$diffinfo->{'to_id'},
2355                                                             hash_base=>$hash,
2356                                                             file_name=>$to->{'file'}),
2357                                                 -class=>"path",
2358                                                 -title=>"diff" . ($i+1)},
2359                                                $i+1) .
2360                                        '/' .
2361                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2362                                                esc_path($from->{'file'}[$i]));
2363                        } else {
2364                                $line = '--- /dev/null';
2365                        }
2366                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2367                }
2368        }
2369
2370        $line = $to_line;
2371        #assert($line =~ m/^\+\+\+/) if DEBUG;
2372        # no extra formatting for "^+++ /dev/null"
2373        if ($line =~ m!^\+\+\+ "?b/!) {
2374                if ($to->{'href'}) {
2375                        $line = '+++ b/' .
2376                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2377                                        esc_path($to->{'file'}));
2378                } else {
2379                        $line = '+++ b/' .
2380                                esc_path($to->{'file'});
2381                }
2382        }
2383        $result .= qq!<div class="diff to_file">$line</div>\n!;
2384
2385        return $result;
2386}
2387
2388# create note for patch simplified by combined diff
2389sub format_diff_cc_simplified {
2390        my ($diffinfo, @parents) = @_;
2391        my $result = '';
2392
2393        $result .= "<div class=\"diff header\">" .
2394                   "diff --cc ";
2395        if (!is_deleted($diffinfo)) {
2396                $result .= $cgi->a({-href => href(action=>"blob",
2397                                                  hash_base=>$hash,
2398                                                  hash=>$diffinfo->{'to_id'},
2399                                                  file_name=>$diffinfo->{'to_file'}),
2400                                    -class => "path"},
2401                                   esc_path($diffinfo->{'to_file'}));
2402        } else {
2403                $result .= esc_path($diffinfo->{'to_file'});
2404        }
2405        $result .= "</div>\n" . # class="diff header"
2406                   "<div class=\"diff nodifferences\">" .
2407                   "Simple merge" .
2408                   "</div>\n"; # class="diff nodifferences"
2409
2410        return $result;
2411}
2412
2413sub diff_line_class {
2414        my ($line, $from, $to) = @_;
2415
2416        # ordinary diff
2417        my $num_sign = 1;
2418        # combined diff
2419        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2420                $num_sign = scalar @{$from->{'href'}};
2421        }
2422
2423        my @diff_line_classifier = (
2424                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2425                { regexp => qr/^\\/,               class => "incomplete"  },
2426                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2427                # classifier for context must come before classifier add/rem,
2428                # or we would have to use more complicated regexp, for example
2429                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2430                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2431                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2432        );
2433        for my $clsfy (@diff_line_classifier) {
2434                return $clsfy->{'class'}
2435                        if ($line =~ $clsfy->{'regexp'});
2436        }
2437
2438        # fallback
2439        return "";
2440}
2441
2442# assumes that $from and $to are defined and correctly filled,
2443# and that $line holds a line of chunk header for unified diff
2444sub format_unidiff_chunk_header {
2445        my ($line, $from, $to) = @_;
2446
2447        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2448                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2449
2450        $from_lines = 0 unless defined $from_lines;
2451        $to_lines   = 0 unless defined $to_lines;
2452
2453        if ($from->{'href'}) {
2454                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2455                                     -class=>"list"}, $from_text);
2456        }
2457        if ($to->{'href'}) {
2458                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2459                                     -class=>"list"}, $to_text);
2460        }
2461        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2462                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2463        return $line;
2464}
2465
2466# assumes that $from and $to are defined and correctly filled,
2467# and that $line holds a line of chunk header for combined diff
2468sub format_cc_diff_chunk_header {
2469        my ($line, $from, $to) = @_;
2470
2471        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2472        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2473
2474        @from_text = split(' ', $ranges);
2475        for (my $i = 0; $i < @from_text; ++$i) {
2476                ($from_start[$i], $from_nlines[$i]) =
2477                        (split(',', substr($from_text[$i], 1)), 0);
2478        }
2479
2480        $to_text   = pop @from_text;
2481        $to_start  = pop @from_start;
2482        $to_nlines = pop @from_nlines;
2483
2484        $line = "<span class=\"chunk_info\">$prefix ";
2485        for (my $i = 0; $i < @from_text; ++$i) {
2486                if ($from->{'href'}[$i]) {
2487                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2488                                          -class=>"list"}, $from_text[$i]);
2489                } else {
2490                        $line .= $from_text[$i];
2491                }
2492                $line .= " ";
2493        }
2494        if ($to->{'href'}) {
2495                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2496                                  -class=>"list"}, $to_text);
2497        } else {
2498                $line .= $to_text;
2499        }
2500        $line .= " $prefix</span>" .
2501                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2502        return $line;
2503}
2504
2505# process patch (diff) line (not to be used for diff headers),
2506# returning HTML-formatted (but not wrapped) line.
2507# If the line is passed as a reference, it is treated as HTML and not
2508# esc_html()'ed.
2509sub format_diff_line {
2510        my ($line, $diff_class, $from, $to) = @_;
2511
2512        if (ref($line)) {
2513                $line = $$line;
2514        } else {
2515                chomp $line;
2516                $line = untabify($line);
2517
2518                if ($from && $to && $line =~ m/^\@{2} /) {
2519                        $line = format_unidiff_chunk_header($line, $from, $to);
2520                } elsif ($from && $to && $line =~ m/^\@{3}/) {
2521                        $line = format_cc_diff_chunk_header($line, $from, $to);
2522                } else {
2523                        $line = esc_html($line, -nbsp=>1);
2524                }
2525        }
2526
2527        my $diff_classes = "diff";
2528        $diff_classes .= " $diff_class" if ($diff_class);
2529        $line = "<div class=\"$diff_classes\">$line</div>\n";
2530
2531        return $line;
2532}
2533
2534# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2535# linked.  Pass the hash of the tree/commit to snapshot.
2536sub format_snapshot_links {
2537        my ($hash) = @_;
2538        my $num_fmts = @snapshot_fmts;
2539        if ($num_fmts > 1) {
2540                # A parenthesized list of links bearing format names.
2541                # e.g. "snapshot (_tar.gz_ _zip_)"
2542                return "snapshot (" . join(' ', map
2543                        $cgi->a({
2544                                -href => href(
2545                                        action=>"snapshot",
2546                                        hash=>$hash,
2547                                        snapshot_format=>$_
2548                                )
2549                        }, $known_snapshot_formats{$_}{'display'})
2550                , @snapshot_fmts) . ")";
2551        } elsif ($num_fmts == 1) {
2552                # A single "snapshot" link whose tooltip bears the format name.
2553                # i.e. "_snapshot_"
2554                my ($fmt) = @snapshot_fmts;
2555                return
2556                        $cgi->a({
2557                                -href => href(
2558                                        action=>"snapshot",
2559                                        hash=>$hash,
2560                                        snapshot_format=>$fmt
2561                                ),
2562                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2563                        }, "snapshot");
2564        } else { # $num_fmts == 0
2565                return undef;
2566        }
2567}
2568
2569## ......................................................................
2570## functions returning values to be passed, perhaps after some
2571## transformation, to other functions; e.g. returning arguments to href()
2572
2573# returns hash to be passed to href to generate gitweb URL
2574# in -title key it returns description of link
2575sub get_feed_info {
2576        my $format = shift || 'Atom';
2577        my %res = (action => lc($format));
2578        my $matched_ref = 0;
2579
2580        # feed links are possible only for project views
2581        return unless (defined $project);
2582        # some views should link to OPML, or to generic project feed,
2583        # or don't have specific feed yet (so they should use generic)
2584        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2585
2586        my $branch = undef;
2587        # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2588        # (fullname) to differentiate from tag links; this also makes
2589        # possible to detect branch links
2590        for my $ref (get_branch_refs()) {
2591                if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2592                    (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2593                        $branch = $1;
2594                        $matched_ref = $ref;
2595                        last;
2596                }
2597        }
2598        # find log type for feed description (title)
2599        my $type = 'log';
2600        if (defined $file_name) {
2601                $type  = "history of $file_name";
2602                $type .= "/" if ($action eq 'tree');
2603                $type .= " on '$branch'" if (defined $branch);
2604        } else {
2605                $type = "log of $branch" if (defined $branch);
2606        }
2607
2608        $res{-title} = $type;
2609        $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2610        $res{'file_name'} = $file_name;
2611
2612        return %res;
2613}
2614
2615## ----------------------------------------------------------------------
2616## git utility subroutines, invoking git commands
2617
2618# returns path to the core git executable and the --git-dir parameter as list
2619sub git_cmd {
2620        $number_of_git_cmds++;
2621        return $GIT, '--git-dir='.$git_dir;
2622}
2623
2624# quote the given arguments for passing them to the shell
2625# quote_command("command", "arg 1", "arg with ' and ! characters")
2626# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2627# Try to avoid using this function wherever possible.
2628sub quote_command {
2629        return join(' ',
2630                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2631}
2632
2633# get HEAD ref of given project as hash
2634sub git_get_head_hash {
2635        return git_get_full_hash(shift, 'HEAD');
2636}
2637
2638sub git_get_full_hash {
2639        return git_get_hash(@_);
2640}
2641
2642sub git_get_short_hash {
2643        return git_get_hash(@_, '--short=7');
2644}
2645
2646sub git_get_hash {
2647        my ($project, $hash, @options) = @_;
2648        my $o_git_dir = $git_dir;
2649        my $retval = undef;
2650        $git_dir = "$projectroot/$project";
2651        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2652            '--verify', '-q', @options, $hash) {
2653                $retval = <$fd>;
2654                chomp $retval if defined $retval;
2655                close $fd;
2656        }
2657        if (defined $o_git_dir) {
2658                $git_dir = $o_git_dir;
2659        }
2660        return $retval;
2661}
2662
2663# get type of given object
2664sub git_get_type {
2665        my $hash = shift;
2666
2667        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2668        my $type = <$fd>;
2669        close $fd or return;
2670        chomp $type;
2671        return $type;
2672}
2673
2674# repository configuration
2675our $config_file = '';
2676our %config;
2677
2678# store multiple values for single key as anonymous array reference
2679# single values stored directly in the hash, not as [ <value> ]
2680sub hash_set_multi {
2681        my ($hash, $key, $value) = @_;
2682
2683        if (!exists $hash->{$key}) {
2684                $hash->{$key} = $value;
2685        } elsif (!ref $hash->{$key}) {
2686                $hash->{$key} = [ $hash->{$key}, $value ];
2687        } else {
2688                push @{$hash->{$key}}, $value;
2689        }
2690}
2691
2692# return hash of git project configuration
2693# optionally limited to some section, e.g. 'gitweb'
2694sub git_parse_project_config {
2695        my $section_regexp = shift;
2696        my %config;
2697
2698        local $/ = "\0";
2699
2700        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2701                or return;
2702
2703        while (my $keyval = <$fh>) {
2704                chomp $keyval;
2705                my ($key, $value) = split(/\n/, $keyval, 2);
2706
2707                hash_set_multi(\%config, $key, $value)
2708                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2709        }
2710        close $fh;
2711
2712        return %config;
2713}
2714
2715# convert config value to boolean: 'true' or 'false'
2716# no value, number > 0, 'true' and 'yes' values are true
2717# rest of values are treated as false (never as error)
2718sub config_to_bool {
2719        my $val = shift;
2720
2721        return 1 if !defined $val;             # section.key
2722
2723        # strip leading and trailing whitespace
2724        $val =~ s/^\s+//;
2725        $val =~ s/\s+$//;
2726
2727        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2728                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2729}
2730
2731# convert config value to simple decimal number
2732# an optional value suffix of 'k', 'm', or 'g' will cause the value
2733# to be multiplied by 1024, 1048576, or 1073741824
2734sub config_to_int {
2735        my $val = shift;
2736
2737        # strip leading and trailing whitespace
2738        $val =~ s/^\s+//;
2739        $val =~ s/\s+$//;
2740
2741        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2742                $unit = lc($unit);
2743                # unknown unit is treated as 1
2744                return $num * ($unit eq 'g' ? 1073741824 :
2745                               $unit eq 'm' ?    1048576 :
2746                               $unit eq 'k' ?       1024 : 1);
2747        }
2748        return $val;
2749}
2750
2751# convert config value to array reference, if needed
2752sub config_to_multi {
2753        my $val = shift;
2754
2755        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2756}
2757
2758sub git_get_project_config {
2759        my ($key, $type) = @_;
2760
2761        return unless defined $git_dir;
2762
2763        # key sanity check
2764        return unless ($key);
2765        # only subsection, if exists, is case sensitive,
2766        # and not lowercased by 'git config -z -l'
2767        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2768                $lo =~ s/_//g;
2769                $key = join(".", lc($hi), $mi, lc($lo));
2770                return if ($lo =~ /\W/ || $hi =~ /\W/);
2771        } else {
2772                $key = lc($key);
2773                $key =~ s/_//g;
2774                return if ($key =~ /\W/);
2775        }
2776        $key =~ s/^gitweb\.//;
2777
2778        # type sanity check
2779        if (defined $type) {
2780                $type =~ s/^--//;
2781                $type = undef
2782                        unless ($type eq 'bool' || $type eq 'int');
2783        }
2784
2785        # get config
2786        if (!defined $config_file ||
2787            $config_file ne "$git_dir/config") {
2788                %config = git_parse_project_config('gitweb');
2789                $config_file = "$git_dir/config";
2790        }
2791
2792        # check if config variable (key) exists
2793        return unless exists $config{"gitweb.$key"};
2794
2795        # ensure given type
2796        if (!defined $type) {
2797                return $config{"gitweb.$key"};
2798        } elsif ($type eq 'bool') {
2799                # backward compatibility: 'git config --bool' returns true/false
2800                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2801        } elsif ($type eq 'int') {
2802                return config_to_int($config{"gitweb.$key"});
2803        }
2804        return $config{"gitweb.$key"};
2805}
2806
2807# get hash of given path at given ref
2808sub git_get_hash_by_path {
2809        my $base = shift;
2810        my $path = shift || return undef;
2811        my $type = shift;
2812
2813        $path =~ s,/+$,,;
2814
2815        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2816                or die_error(500, "Open git-ls-tree failed");
2817        my $line = <$fd>;
2818        close $fd or return undef;
2819
2820        if (!defined $line) {
2821                # there is no tree or hash given by $path at $base
2822                return undef;
2823        }
2824
2825        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2826        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2827        if (defined $type && $type ne $2) {
2828                # type doesn't match
2829                return undef;
2830        }
2831        return $3;
2832}
2833
2834# get path of entry with given hash at given tree-ish (ref)
2835# used to get 'from' filename for combined diff (merge commit) for renames
2836sub git_get_path_by_hash {
2837        my $base = shift || return;
2838        my $hash = shift || return;
2839
2840        local $/ = "\0";
2841
2842        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2843                or return undef;
2844        while (my $line = <$fd>) {
2845                chomp $line;
2846
2847                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2848                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2849                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2850                        close $fd;
2851                        return $1;
2852                }
2853        }
2854        close $fd;
2855        return undef;
2856}
2857
2858## ......................................................................
2859## git utility functions, directly accessing git repository
2860
2861# get the value of config variable either from file named as the variable
2862# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2863# configuration variable in the repository config file.
2864sub git_get_file_or_project_config {
2865        my ($path, $name) = @_;
2866
2867        $git_dir = "$projectroot/$path";
2868        open my $fd, '<', "$git_dir/$name"
2869                or return git_get_project_config($name);
2870        my $conf = <$fd>;
2871        close $fd;
2872        if (defined $conf) {
2873                chomp $conf;
2874        }
2875        return $conf;
2876}
2877
2878sub git_get_project_description {
2879        my $path = shift;
2880        return git_get_file_or_project_config($path, 'description');
2881}
2882
2883sub git_get_project_category {
2884        my $path = shift;
2885        return git_get_file_or_project_config($path, 'category');
2886}
2887
2888
2889# supported formats:
2890# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2891#   - if its contents is a number, use it as tag weight,
2892#   - otherwise add a tag with weight 1
2893# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2894#   the same value multiple times increases tag weight
2895# * `gitweb.ctag' multi-valued repo config variable
2896sub git_get_project_ctags {
2897        my $project = shift;
2898        my $ctags = {};
2899
2900        $git_dir = "$projectroot/$project";
2901        if (opendir my $dh, "$git_dir/ctags") {
2902                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2903                foreach my $tagfile (@files) {
2904                        open my $ct, '<', $tagfile
2905                                or next;
2906                        my $val = <$ct>;
2907                        chomp $val if $val;
2908                        close $ct;
2909
2910                        (my $ctag = $tagfile) =~ s#.*/##;
2911                        if ($val =~ /^\d+$/) {
2912                                $ctags->{$ctag} = $val;
2913                        } else {
2914                                $ctags->{$ctag} = 1;
2915                        }
2916                }
2917                closedir $dh;
2918
2919        } elsif (open my $fh, '<', "$git_dir/ctags") {
2920                while (my $line = <$fh>) {
2921                        chomp $line;
2922                        $ctags->{$line}++ if $line;
2923                }
2924                close $fh;
2925
2926        } else {
2927                my $taglist = config_to_multi(git_get_project_config('ctag'));
2928                foreach my $tag (@$taglist) {
2929                        $ctags->{$tag}++;
2930                }
2931        }
2932
2933        return $ctags;
2934}
2935
2936# return hash, where keys are content tags ('ctags'),
2937# and values are sum of weights of given tag in every project
2938sub git_gather_all_ctags {
2939        my $projects = shift;
2940        my $ctags = {};
2941
2942        foreach my $p (@$projects) {
2943                foreach my $ct (keys %{$p->{'ctags'}}) {
2944                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2945                }
2946        }
2947
2948        return $ctags;
2949}
2950
2951sub git_populate_project_tagcloud {
2952        my $ctags = shift;
2953
2954        # First, merge different-cased tags; tags vote on casing
2955        my %ctags_lc;
2956        foreach (keys %$ctags) {
2957                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2958                if (not $ctags_lc{lc $_}->{topcount}
2959                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2960                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2961                        $ctags_lc{lc $_}->{topname} = $_;
2962                }
2963        }
2964
2965        my $cloud;
2966        my $matched = $input_params{'ctag'};
2967        if (eval { require HTML::TagCloud; 1; }) {
2968                $cloud = HTML::TagCloud->new;
2969                foreach my $ctag (sort keys %ctags_lc) {
2970                        # Pad the title with spaces so that the cloud looks
2971                        # less crammed.
2972                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2973                        $title =~ s/ /&nbsp;/g;
2974                        $title =~ s/^/&nbsp;/g;
2975                        $title =~ s/$/&nbsp;/g;
2976                        if (defined $matched && $matched eq $ctag) {
2977                                $title = qq(<span class="match">$title</span>);
2978                        }
2979                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2980                                    $ctags_lc{$ctag}->{count});
2981                }
2982        } else {
2983                $cloud = {};
2984                foreach my $ctag (keys %ctags_lc) {
2985                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2986                        if (defined $matched && $matched eq $ctag) {
2987                                $title = qq(<span class="match">$title</span>);
2988                        }
2989                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2990                        $cloud->{$ctag}{ctag} =
2991                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2992                }
2993        }
2994        return $cloud;
2995}
2996
2997sub git_show_project_tagcloud {
2998        my ($cloud, $count) = @_;
2999        if (ref $cloud eq 'HTML::TagCloud') {
3000                return $cloud->html_and_css($count);
3001        } else {
3002                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3003                return
3004                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3005                        join (', ', map {
3006                                $cloud->{$_}->{'ctag'}
3007                        } splice(@tags, 0, $count)) .
3008                        '</div>';
3009        }
3010}
3011
3012sub git_get_project_url_list {
3013        my $path = shift;
3014
3015        $git_dir = "$projectroot/$path";
3016        open my $fd, '<', "$git_dir/cloneurl"
3017                or return wantarray ?
3018                @{ config_to_multi(git_get_project_config('url')) } :
3019                   config_to_multi(git_get_project_config('url'));
3020        my @git_project_url_list = map { chomp; $_ } <$fd>;
3021        close $fd;
3022
3023        return wantarray ? @git_project_url_list : \@git_project_url_list;
3024}
3025
3026sub git_get_projects_list {
3027        my $filter = shift || '';
3028        my $paranoid = shift;
3029        my @list;
3030
3031        if (-d $projects_list) {
3032                # search in directory
3033                my $dir = $projects_list;
3034                # remove the trailing "/"
3035                $dir =~ s!/+$!!;
3036                my $pfxlen = length("$dir");
3037                my $pfxdepth = ($dir =~ tr!/!!);
3038                # when filtering, search only given subdirectory
3039                if ($filter && !$paranoid) {
3040                        $dir .= "/$filter";
3041                        $dir =~ s!/+$!!;
3042                }
3043
3044                File::Find::find({
3045                        follow_fast => 1, # follow symbolic links
3046                        follow_skip => 2, # ignore duplicates
3047                        dangling_symlinks => 0, # ignore dangling symlinks, silently
3048                        wanted => sub {
3049                                # global variables
3050                                our $project_maxdepth;
3051                                our $projectroot;
3052                                # skip project-list toplevel, if we get it.
3053                                return if (m!^[/.]$!);
3054                                # only directories can be git repositories
3055                                return unless (-d $_);
3056                                # don't traverse too deep (Find is super slow on os x)
3057                                # $project_maxdepth excludes depth of $projectroot
3058                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3059                                        $File::Find::prune = 1;
3060                                        return;
3061                                }
3062
3063                                my $path = substr($File::Find::name, $pfxlen + 1);
3064                                # paranoidly only filter here
3065                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3066                                        next;
3067                                }
3068                                # we check related file in $projectroot
3069                                if (check_export_ok("$projectroot/$path")) {
3070                                        push @list, { path => $path };
3071                                        $File::Find::prune = 1;
3072                                }
3073                        },
3074                }, "$dir");
3075
3076        } elsif (-f $projects_list) {
3077                # read from file(url-encoded):
3078                # 'git%2Fgit.git Linus+Torvalds'
3079                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3080                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3081                open my $fd, '<', $projects_list or return;
3082        PROJECT:
3083                while (my $line = <$fd>) {
3084                        chomp $line;
3085                        my ($path, $owner) = split ' ', $line;
3086                        $path = unescape($path);
3087                        $owner = unescape($owner);
3088                        if (!defined $path) {
3089                                next;
3090                        }
3091                        # if $filter is rpovided, check if $path begins with $filter
3092                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3093                                next;
3094                        }
3095                        if (check_export_ok("$projectroot/$path")) {
3096                                my $pr = {
3097                                        path => $path
3098                                };
3099                                if ($owner) {
3100                                        $pr->{'owner'} = to_utf8($owner);
3101                                }
3102                                push @list, $pr;
3103                        }
3104                }
3105                close $fd;
3106        }
3107        return @list;
3108}
3109
3110# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3111# as side effects it sets 'forks' field to list of forks for forked projects
3112sub filter_forks_from_projects_list {
3113        my $projects = shift;
3114
3115        my %trie; # prefix tree of directories (path components)
3116        # generate trie out of those directories that might contain forks
3117        foreach my $pr (@$projects) {
3118                my $path = $pr->{'path'};
3119                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3120                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3121                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3122                next unless (-d "$projectroot/$path"); # containing directory exists
3123                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3124
3125                # add to trie
3126                my @dirs = split('/', $path);
3127                # walk the trie, until either runs out of components or out of trie
3128                my $ref = \%trie;
3129                while (scalar @dirs &&
3130                       exists($ref->{$dirs[0]})) {
3131                        $ref = $ref->{shift @dirs};
3132                }
3133                # create rest of trie structure from rest of components
3134                foreach my $dir (@dirs) {
3135                        $ref = $ref->{$dir} = {};
3136                }
3137                # create end marker, store $pr as a data
3138                $ref->{''} = $pr if (!exists $ref->{''});
3139        }
3140
3141        # filter out forks, by finding shortest prefix match for paths
3142        my @filtered;
3143 PROJECT:
3144        foreach my $pr (@$projects) {
3145                # trie lookup
3146                my $ref = \%trie;
3147        DIR:
3148                foreach my $dir (split('/', $pr->{'path'})) {
3149                        if (exists $ref->{''}) {
3150                                # found [shortest] prefix, is a fork - skip it
3151                                push @{$ref->{''}{'forks'}}, $pr;
3152                                next PROJECT;
3153                        }
3154                        if (!exists $ref->{$dir}) {
3155                                # not in trie, cannot have prefix, not a fork
3156                                push @filtered, $pr;
3157                                next PROJECT;
3158                        }
3159                        # If the dir is there, we just walk one step down the trie.
3160                        $ref = $ref->{$dir};
3161                }
3162                # we ran out of trie
3163                # (shouldn't happen: it's either no match, or end marker)
3164                push @filtered, $pr;
3165        }
3166
3167        return @filtered;
3168}
3169
3170# note: fill_project_list_info must be run first,
3171# for 'descr_long' and 'ctags' to be filled
3172sub search_projects_list {
3173        my ($projlist, %opts) = @_;
3174        my $tagfilter  = $opts{'tagfilter'};
3175        my $search_re = $opts{'search_regexp'};
3176
3177        return @$projlist
3178                unless ($tagfilter || $search_re);
3179
3180        # searching projects require filling to be run before it;
3181        fill_project_list_info($projlist,
3182                               $tagfilter  ? 'ctags' : (),
3183                               $search_re ? ('path', 'descr') : ());
3184        my @projects;
3185 PROJECT:
3186        foreach my $pr (@$projlist) {
3187
3188                if ($tagfilter) {
3189                        next unless ref($pr->{'ctags'}) eq 'HASH';
3190                        next unless
3191                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3192                }
3193
3194                if ($search_re) {
3195                        next unless
3196                                $pr->{'path'} =~ /$search_re/ ||
3197                                $pr->{'descr_long'} =~ /$search_re/;
3198                }
3199
3200                push @projects, $pr;
3201        }
3202
3203        return @projects;
3204}
3205
3206our $gitweb_project_owner = undef;
3207sub git_get_project_list_from_file {
3208
3209        return if (defined $gitweb_project_owner);
3210
3211        $gitweb_project_owner = {};
3212        # read from file (url-encoded):
3213        # 'git%2Fgit.git Linus+Torvalds'
3214        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3215        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3216        if (-f $projects_list) {
3217                open(my $fd, '<', $projects_list);
3218                while (my $line = <$fd>) {
3219                        chomp $line;
3220                        my ($pr, $ow) = split ' ', $line;
3221                        $pr = unescape($pr);
3222                        $ow = unescape($ow);
3223                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3224                }
3225                close $fd;
3226        }
3227}
3228
3229sub git_get_project_owner {
3230        my $project = shift;
3231        my $owner;
3232
3233        return undef unless $project;
3234        $git_dir = "$projectroot/$project";
3235
3236        if (!defined $gitweb_project_owner) {
3237                git_get_project_list_from_file();
3238        }
3239
3240        if (exists $gitweb_project_owner->{$project}) {
3241                $owner = $gitweb_project_owner->{$project};
3242        }
3243        if (!defined $owner){
3244                $owner = git_get_project_config('owner');
3245        }
3246        if (!defined $owner) {
3247                $owner = get_file_owner("$git_dir");
3248        }
3249
3250        return $owner;
3251}
3252
3253sub git_get_last_activity {
3254        my ($path) = @_;
3255        my $fd;
3256
3257        $git_dir = "$projectroot/$path";
3258        open($fd, "-|", git_cmd(), 'for-each-ref',
3259             '--format=%(committer)',
3260             '--sort=-committerdate',
3261             '--count=1',
3262             map { "refs/$_" } get_branch_refs ()) or return;
3263        my $most_recent = <$fd>;
3264        close $fd or return;
3265        if (defined $most_recent &&
3266            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3267                my $timestamp = $1;
3268                my $age = time - $timestamp;
3269                return ($age, age_string($age));
3270        }
3271        return (undef, undef);
3272}
3273
3274# Implementation note: when a single remote is wanted, we cannot use 'git
3275# remote show -n' because that command always work (assuming it's a remote URL
3276# if it's not defined), and we cannot use 'git remote show' because that would
3277# try to make a network roundtrip. So the only way to find if that particular
3278# remote is defined is to walk the list provided by 'git remote -v' and stop if
3279# and when we find what we want.
3280sub git_get_remotes_list {
3281        my $wanted = shift;
3282        my %remotes = ();
3283
3284        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3285        return unless $fd;
3286        while (my $remote = <$fd>) {
3287                chomp $remote;
3288                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3289                next if $wanted and not $remote eq $wanted;
3290                my ($url, $key) = ($1, $2);
3291
3292                $remotes{$remote} ||= { 'heads' => () };
3293                $remotes{$remote}{$key} = $url;
3294        }
3295        close $fd or return;
3296        return wantarray ? %remotes : \%remotes;
3297}
3298
3299# Takes a hash of remotes as first parameter and fills it by adding the
3300# available remote heads for each of the indicated remotes.
3301sub fill_remote_heads {
3302        my $remotes = shift;
3303        my @heads = map { "remotes/$_" } keys %$remotes;
3304        my @remoteheads = git_get_heads_list(undef, @heads);
3305        foreach my $remote (keys %$remotes) {
3306                $remotes->{$remote}{'heads'} = [ grep {
3307                        $_->{'name'} =~ s!^$remote/!!
3308                        } @remoteheads ];
3309        }
3310}
3311
3312sub git_get_references {
3313        my $type = shift || "";
3314        my %refs;
3315        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3316        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3317        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3318                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3319                or return;
3320
3321        while (my $line = <$fd>) {
3322                chomp $line;
3323                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3324                        if (defined $refs{$1}) {
3325                                push @{$refs{$1}}, $2;
3326                        } else {
3327                                $refs{$1} = [ $2 ];
3328                        }
3329                }
3330        }
3331        close $fd or return;
3332        return \%refs;
3333}
3334
3335sub git_get_rev_name_tags {
3336        my $hash = shift || return undef;
3337
3338        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3339                or return;
3340        my $name_rev = <$fd>;
3341        close $fd;
3342
3343        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3344                return $1;
3345        } else {
3346                # catches also '$hash undefined' output
3347                return undef;
3348        }
3349}
3350
3351## ----------------------------------------------------------------------
3352## parse to hash functions
3353
3354sub parse_date {
3355        my $epoch = shift;
3356        my $tz = shift || "-0000";
3357
3358        my %date;
3359        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3360        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3361        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3362        $date{'hour'} = $hour;
3363        $date{'minute'} = $min;
3364        $date{'mday'} = $mday;
3365        $date{'day'} = $days[$wday];
3366        $date{'month'} = $months[$mon];
3367        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3368                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3369        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3370                             $mday, $months[$mon], $hour ,$min;
3371        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3372                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3373
3374        my ($tz_sign, $tz_hour, $tz_min) =
3375                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3376        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3377        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3378        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3379        $date{'hour_local'} = $hour;
3380        $date{'minute_local'} = $min;
3381        $date{'tz_local'} = $tz;
3382        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3383                                  1900+$year, $mon+1, $mday,
3384                                  $hour, $min, $sec, $tz);
3385        return %date;
3386}
3387
3388sub parse_tag {
3389        my $tag_id = shift;
3390        my %tag;
3391        my @comment;
3392
3393        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3394        $tag{'id'} = $tag_id;
3395        while (my $line = <$fd>) {
3396                chomp $line;
3397                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3398                        $tag{'object'} = $1;
3399                } elsif ($line =~ m/^type (.+)$/) {
3400                        $tag{'type'} = $1;
3401                } elsif ($line =~ m/^tag (.+)$/) {
3402                        $tag{'name'} = $1;
3403                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3404                        $tag{'author'} = $1;
3405                        $tag{'author_epoch'} = $2;
3406                        $tag{'author_tz'} = $3;
3407                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3408                                $tag{'author_name'}  = $1;
3409                                $tag{'author_email'} = $2;
3410                        } else {
3411                                $tag{'author_name'} = $tag{'author'};
3412                        }
3413                } elsif ($line =~ m/--BEGIN/) {
3414                        push @comment, $line;
3415                        last;
3416                } elsif ($line eq "") {
3417                        last;
3418                }
3419        }
3420        push @comment, <$fd>;
3421        $tag{'comment'} = \@comment;
3422        close $fd or return;
3423        if (!defined $tag{'name'}) {
3424                return
3425        };
3426        return %tag
3427}
3428
3429sub parse_commit_text {
3430        my ($commit_text, $withparents) = @_;
3431        my @commit_lines = split '\n', $commit_text;
3432        my %co;
3433
3434        pop @commit_lines; # Remove '\0'
3435
3436        if (! @commit_lines) {
3437                return;
3438        }
3439
3440        my $header = shift @commit_lines;
3441        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3442                return;
3443        }
3444        ($co{'id'}, my @parents) = split ' ', $header;
3445        while (my $line = shift @commit_lines) {
3446                last if $line eq "\n";
3447                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3448                        $co{'tree'} = $1;
3449                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3450                        push @parents, $1;
3451                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3452                        $co{'author'} = to_utf8($1);
3453                        $co{'author_epoch'} = $2;
3454                        $co{'author_tz'} = $3;
3455                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3456                                $co{'author_name'}  = $1;
3457                                $co{'author_email'} = $2;
3458                        } else {
3459                                $co{'author_name'} = $co{'author'};
3460                        }
3461                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3462                        $co{'committer'} = to_utf8($1);
3463                        $co{'committer_epoch'} = $2;
3464                        $co{'committer_tz'} = $3;
3465                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3466                                $co{'committer_name'}  = $1;
3467                                $co{'committer_email'} = $2;
3468                        } else {
3469                                $co{'committer_name'} = $co{'committer'};
3470                        }
3471                }
3472        }
3473        if (!defined $co{'tree'}) {
3474                return;
3475        };
3476        $co{'parents'} = \@parents;
3477        $co{'parent'} = $parents[0];
3478
3479        foreach my $title (@commit_lines) {
3480                $title =~ s/^    //;
3481                if ($title ne "") {
3482                        $co{'title'} = chop_str($title, 80, 5);
3483                        # remove leading stuff of merges to make the interesting part visible
3484                        if (length($title) > 50) {
3485                                $title =~ s/^Automatic //;
3486                                $title =~ s/^merge (of|with) /Merge ... /i;
3487                                if (length($title) > 50) {
3488                                        $title =~ s/(http|rsync):\/\///;
3489                                }
3490                                if (length($title) > 50) {
3491                                        $title =~ s/(master|www|rsync)\.//;
3492                                }
3493                                if (length($title) > 50) {
3494                                        $title =~ s/kernel.org:?//;
3495                                }
3496                                if (length($title) > 50) {
3497                                        $title =~ s/\/pub\/scm//;
3498                                }
3499                        }
3500                        $co{'title_short'} = chop_str($title, 50, 5);
3501                        last;
3502                }
3503        }
3504        if (! defined $co{'title'} || $co{'title'} eq "") {
3505                $co{'title'} = $co{'title_short'} = '(no commit message)';
3506        }
3507        # remove added spaces
3508        foreach my $line (@commit_lines) {
3509                $line =~ s/^    //;
3510        }
3511        $co{'comment'} = \@commit_lines;
3512
3513        my $age = time - $co{'committer_epoch'};
3514        $co{'age'} = $age;
3515        $co{'age_string'} = age_string($age);
3516        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3517        if ($age > 60*60*24*7*2) {
3518                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3519                $co{'age_string_age'} = $co{'age_string'};
3520        } else {
3521                $co{'age_string_date'} = $co{'age_string'};
3522                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3523        }
3524        return %co;
3525}
3526
3527sub parse_commit {
3528        my ($commit_id) = @_;
3529        my %co;
3530
3531        local $/ = "\0";
3532
3533        open my $fd, "-|", git_cmd(), "rev-list",
3534                "--parents",
3535                "--header",
3536                "--max-count=1",
3537                $commit_id,
3538                "--",
3539                or die_error(500, "Open git-rev-list failed");
3540        %co = parse_commit_text(<$fd>, 1);
3541        close $fd;
3542
3543        return %co;
3544}
3545
3546sub parse_commits {
3547        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3548        my @cos;
3549
3550        $maxcount ||= 1;
3551        $skip ||= 0;
3552
3553        local $/ = "\0";
3554
3555        open my $fd, "-|", git_cmd(), "rev-list",
3556                "--header",
3557                @args,
3558                ("--max-count=" . $maxcount),
3559                ("--skip=" . $skip),
3560                @extra_options,
3561                $commit_id,
3562                "--",
3563                ($filename ? ($filename) : ())
3564                or die_error(500, "Open git-rev-list failed");
3565        while (my $line = <$fd>) {
3566                my %co = parse_commit_text($line);
3567                push @cos, \%co;
3568        }
3569        close $fd;
3570
3571        return wantarray ? @cos : \@cos;
3572}
3573
3574# parse line of git-diff-tree "raw" output
3575sub parse_difftree_raw_line {
3576        my $line = shift;
3577        my %res;
3578
3579        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3580        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3581        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3582                $res{'from_mode'} = $1;
3583                $res{'to_mode'} = $2;
3584                $res{'from_id'} = $3;
3585                $res{'to_id'} = $4;
3586                $res{'status'} = $5;
3587                $res{'similarity'} = $6;
3588                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3589                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3590                } else {
3591                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3592                }
3593        }
3594        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3595        # combined diff (for merge commit)
3596        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3597                $res{'nparents'}  = length($1);
3598                $res{'from_mode'} = [ split(' ', $2) ];
3599                $res{'to_mode'} = pop @{$res{'from_mode'}};
3600                $res{'from_id'} = [ split(' ', $3) ];
3601                $res{'to_id'} = pop @{$res{'from_id'}};
3602                $res{'status'} = [ split('', $4) ];
3603                $res{'to_file'} = unquote($5);
3604        }
3605        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3606        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3607                $res{'commit'} = $1;
3608        }
3609
3610        return wantarray ? %res : \%res;
3611}
3612
3613# wrapper: return parsed line of git-diff-tree "raw" output
3614# (the argument might be raw line, or parsed info)
3615sub parsed_difftree_line {
3616        my $line_or_ref = shift;
3617
3618        if (ref($line_or_ref) eq "HASH") {
3619                # pre-parsed (or generated by hand)
3620                return $line_or_ref;
3621        } else {
3622                return parse_difftree_raw_line($line_or_ref);
3623        }
3624}
3625
3626# parse line of git-ls-tree output
3627sub parse_ls_tree_line {
3628        my $line = shift;
3629        my %opts = @_;
3630        my %res;
3631
3632        if ($opts{'-l'}) {
3633                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3634                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3635
3636                $res{'mode'} = $1;
3637                $res{'type'} = $2;
3638                $res{'hash'} = $3;
3639                $res{'size'} = $4;
3640                if ($opts{'-z'}) {
3641                        $res{'name'} = $5;
3642                } else {
3643                        $res{'name'} = unquote($5);
3644                }
3645        } else {
3646                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3647                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3648
3649                $res{'mode'} = $1;
3650                $res{'type'} = $2;
3651                $res{'hash'} = $3;
3652                if ($opts{'-z'}) {
3653                        $res{'name'} = $4;
3654                } else {
3655                        $res{'name'} = unquote($4);
3656                }
3657        }
3658
3659        return wantarray ? %res : \%res;
3660}
3661
3662# generates _two_ hashes, references to which are passed as 2 and 3 argument
3663sub parse_from_to_diffinfo {
3664        my ($diffinfo, $from, $to, @parents) = @_;
3665
3666        if ($diffinfo->{'nparents'}) {
3667                # combined diff
3668                $from->{'file'} = [];
3669                $from->{'href'} = [];
3670                fill_from_file_info($diffinfo, @parents)
3671                        unless exists $diffinfo->{'from_file'};
3672                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3673                        $from->{'file'}[$i] =
3674                                defined $diffinfo->{'from_file'}[$i] ?
3675                                        $diffinfo->{'from_file'}[$i] :
3676                                        $diffinfo->{'to_file'};
3677                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3678                                $from->{'href'}[$i] = href(action=>"blob",
3679                                                           hash_base=>$parents[$i],
3680                                                           hash=>$diffinfo->{'from_id'}[$i],
3681                                                           file_name=>$from->{'file'}[$i]);
3682                        } else {
3683                                $from->{'href'}[$i] = undef;
3684                        }
3685                }
3686        } else {
3687                # ordinary (not combined) diff
3688                $from->{'file'} = $diffinfo->{'from_file'};
3689                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3690                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3691                                               hash=>$diffinfo->{'from_id'},
3692                                               file_name=>$from->{'file'});
3693                } else {
3694                        delete $from->{'href'};
3695                }
3696        }
3697
3698        $to->{'file'} = $diffinfo->{'to_file'};
3699        if (!is_deleted($diffinfo)) { # file exists in result
3700                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3701                                     hash=>$diffinfo->{'to_id'},
3702                                     file_name=>$to->{'file'});
3703        } else {
3704                delete $to->{'href'};
3705        }
3706}
3707
3708## ......................................................................
3709## parse to array of hashes functions
3710
3711sub git_get_heads_list {
3712        my ($limit, @classes) = @_;
3713        @classes = get_branch_refs() unless @classes;
3714        my @patterns = map { "refs/$_" } @classes;
3715        my @headslist;
3716
3717        open my $fd, '-|', git_cmd(), 'for-each-ref',
3718                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3719                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3720                @patterns
3721                or return;
3722        while (my $line = <$fd>) {
3723                my %ref_item;
3724
3725                chomp $line;
3726                my ($refinfo, $committerinfo) = split(/\0/, $line);
3727                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3728                my ($committer, $epoch, $tz) =
3729                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3730                $ref_item{'fullname'}  = $name;
3731                my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3732                $name =~ s!^refs/($strip_refs|remotes)/!!;
3733                $ref_item{'name'} = $name;
3734                # for refs neither in 'heads' nor 'remotes' we want to
3735                # show their ref dir
3736                my $ref_dir = (defined $1) ? $1 : '';
3737                if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3738                    $ref_item{'name'} .= ' (' . $ref_dir . ')';
3739                }
3740
3741                $ref_item{'id'}    = $hash;
3742                $ref_item{'title'} = $title || '(no commit message)';
3743                $ref_item{'epoch'} = $epoch;
3744                if ($epoch) {
3745                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3746                } else {
3747                        $ref_item{'age'} = "unknown";
3748                }
3749
3750                push @headslist, \%ref_item;
3751        }
3752        close $fd;
3753
3754        return wantarray ? @headslist : \@headslist;
3755}
3756
3757sub git_get_tags_list {
3758        my $limit = shift;
3759        my @tagslist;
3760
3761        open my $fd, '-|', git_cmd(), 'for-each-ref',
3762                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3763                '--format=%(objectname) %(objecttype) %(refname) '.
3764                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3765                'refs/tags'
3766                or return;
3767        while (my $line = <$fd>) {
3768                my %ref_item;
3769
3770                chomp $line;
3771                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3772                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3773                my ($creator, $epoch, $tz) =
3774                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3775                $ref_item{'fullname'} = $name;
3776                $name =~ s!^refs/tags/!!;
3777
3778                $ref_item{'type'} = $type;
3779                $ref_item{'id'} = $id;
3780                $ref_item{'name'} = $name;
3781                if ($type eq "tag") {
3782                        $ref_item{'subject'} = $title;
3783                        $ref_item{'reftype'} = $reftype;
3784                        $ref_item{'refid'}   = $refid;
3785                } else {
3786                        $ref_item{'reftype'} = $type;
3787                        $ref_item{'refid'}   = $id;
3788                }
3789
3790                if ($type eq "tag" || $type eq "commit") {
3791                        $ref_item{'epoch'} = $epoch;
3792                        if ($epoch) {
3793                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3794                        } else {
3795                                $ref_item{'age'} = "unknown";
3796                        }
3797                }
3798
3799                push @tagslist, \%ref_item;
3800        }
3801        close $fd;
3802
3803        return wantarray ? @tagslist : \@tagslist;
3804}
3805
3806## ----------------------------------------------------------------------
3807## filesystem-related functions
3808
3809sub get_file_owner {
3810        my $path = shift;
3811
3812        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3813        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3814        if (!defined $gcos) {
3815                return undef;
3816        }
3817        my $owner = $gcos;
3818        $owner =~ s/[,;].*$//;
3819        return to_utf8($owner);
3820}
3821
3822# assume that file exists
3823sub insert_file {
3824        my $filename = shift;
3825
3826        open my $fd, '<', $filename;
3827        print map { to_utf8($_) } <$fd>;
3828        close $fd;
3829}
3830
3831## ......................................................................
3832## mimetype related functions
3833
3834sub mimetype_guess_file {
3835        my $filename = shift;
3836        my $mimemap = shift;
3837        -r $mimemap or return undef;
3838
3839        my %mimemap;
3840        open(my $mh, '<', $mimemap) or return undef;
3841        while (<$mh>) {
3842                next if m/^#/; # skip comments
3843                my ($mimetype, @exts) = split(/\s+/);
3844                foreach my $ext (@exts) {
3845                        $mimemap{$ext} = $mimetype;
3846                }
3847        }
3848        close($mh);
3849
3850        $filename =~ /\.([^.]*)$/;
3851        return $mimemap{$1};
3852}
3853
3854sub mimetype_guess {
3855        my $filename = shift;
3856        my $mime;
3857        $filename =~ /\./ or return undef;
3858
3859        if ($mimetypes_file) {
3860                my $file = $mimetypes_file;
3861                if ($file !~ m!^/!) { # if it is relative path
3862                        # it is relative to project
3863                        $file = "$projectroot/$project/$file";
3864                }
3865                $mime = mimetype_guess_file($filename, $file);
3866        }
3867        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3868        return $mime;
3869}
3870
3871sub blob_mimetype {
3872        my $fd = shift;
3873        my $filename = shift;
3874
3875        if ($filename) {
3876                my $mime = mimetype_guess($filename);
3877                $mime and return $mime;
3878        }
3879
3880        # just in case
3881        return $default_blob_plain_mimetype unless $fd;
3882
3883        if (-T $fd) {
3884                return 'text/plain';
3885        } elsif (! $filename) {
3886                return 'application/octet-stream';
3887        } elsif ($filename =~ m/\.png$/i) {
3888                return 'image/png';
3889        } elsif ($filename =~ m/\.gif$/i) {
3890                return 'image/gif';
3891        } elsif ($filename =~ m/\.jpe?g$/i) {
3892                return 'image/jpeg';
3893        } else {
3894                return 'application/octet-stream';
3895        }
3896}
3897
3898sub blob_contenttype {
3899        my ($fd, $file_name, $type) = @_;
3900
3901        $type ||= blob_mimetype($fd, $file_name);
3902        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3903                $type .= "; charset=$default_text_plain_charset";
3904        }
3905
3906        return $type;
3907}
3908
3909# guess file syntax for syntax highlighting; return undef if no highlighting
3910# the name of syntax can (in the future) depend on syntax highlighter used
3911sub guess_file_syntax {
3912        my ($highlight, $mimetype, $file_name) = @_;
3913        return undef unless ($highlight && defined $file_name);
3914        my $basename = basename($file_name, '.in');
3915        return $highlight_basename{$basename}
3916                if exists $highlight_basename{$basename};
3917
3918        $basename =~ /\.([^.]*)$/;
3919        my $ext = $1 or return undef;
3920        return $highlight_ext{$ext}
3921                if exists $highlight_ext{$ext};
3922
3923        return undef;
3924}
3925
3926# run highlighter and return FD of its output,
3927# or return original FD if no highlighting
3928sub run_highlighter {
3929        my ($fd, $highlight, $syntax) = @_;
3930        return $fd unless ($highlight && defined $syntax);
3931
3932        close $fd;
3933        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3934                  quote_command($highlight_bin).
3935                  " --replace-tabs=8 --fragment --syntax $syntax |"
3936                or die_error(500, "Couldn't open file or run syntax highlighter");
3937        return $fd;
3938}
3939
3940## ======================================================================
3941## functions printing HTML: header, footer, error page
3942
3943sub get_page_title {
3944        my $title = to_utf8($site_name);
3945
3946        unless (defined $project) {
3947                if (defined $project_filter) {
3948                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3949                }
3950                return $title;
3951        }
3952        $title .= " - " . to_utf8($project);
3953
3954        return $title unless (defined $action);
3955        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3956
3957        return $title unless (defined $file_name);
3958        $title .= " - " . esc_path($file_name);
3959        if ($action eq "tree" && $file_name !~ m|/$|) {
3960                $title .= "/";
3961        }
3962
3963        return $title;
3964}
3965
3966sub get_content_type_html {
3967        # require explicit support from the UA if we are to send the page as
3968        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3969        # we have to do this because MSIE sometimes globs '*/*', pretending to
3970        # support xhtml+xml but choking when it gets what it asked for.
3971        if (defined $cgi->http('HTTP_ACCEPT') &&
3972            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3973            $cgi->Accept('application/xhtml+xml') != 0) {
3974                return 'application/xhtml+xml';
3975        } else {
3976                return 'text/html';
3977        }
3978}
3979
3980sub print_feed_meta {
3981        if (defined $project) {
3982                my %href_params = get_feed_info();
3983                if (!exists $href_params{'-title'}) {
3984                        $href_params{'-title'} = 'log';
3985                }
3986
3987                foreach my $format (qw(RSS Atom)) {
3988                        my $type = lc($format);
3989                        my %link_attr = (
3990                                '-rel' => 'alternate',
3991                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3992                                '-type' => "application/$type+xml"
3993                        );
3994
3995                        $href_params{'extra_options'} = undef;
3996                        $href_params{'action'} = $type;
3997                        $link_attr{'-href'} = href(%href_params);
3998                        print "<link ".
3999                              "rel=\"$link_attr{'-rel'}\" ".
4000                              "title=\"$link_attr{'-title'}\" ".
4001                              "href=\"$link_attr{'-href'}\" ".
4002                              "type=\"$link_attr{'-type'}\" ".
4003                              "/>\n";
4004
4005                        $href_params{'extra_options'} = '--no-merges';
4006                        $link_attr{'-href'} = href(%href_params);
4007                        $link_attr{'-title'} .= ' (no merges)';
4008                        print "<link ".
4009                              "rel=\"$link_attr{'-rel'}\" ".
4010                              "title=\"$link_attr{'-title'}\" ".
4011                              "href=\"$link_attr{'-href'}\" ".
4012                              "type=\"$link_attr{'-type'}\" ".
4013                              "/>\n";
4014                }
4015
4016        } else {
4017                printf('<link rel="alternate" title="%s projects list" '.
4018                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
4019                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
4020                printf('<link rel="alternate" title="%s projects feeds" '.
4021                       'href="%s" type="text/x-opml" />'."\n",
4022                       esc_attr($site_name), href(project=>undef, action=>"opml"));
4023        }
4024}
4025
4026sub print_header_links {
4027        my $status = shift;
4028
4029        # print out each stylesheet that exist, providing backwards capability
4030        # for those people who defined $stylesheet in a config file
4031        if (defined $stylesheet) {
4032                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4033        } else {
4034                foreach my $stylesheet (@stylesheets) {
4035                        next unless $stylesheet;
4036                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4037                }
4038        }
4039        print_feed_meta()
4040                if ($status eq '200 OK');
4041        if (defined $favicon) {
4042                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4043        }
4044}
4045
4046sub print_nav_breadcrumbs_path {
4047        my $dirprefix = undef;
4048        while (my $part = shift) {
4049                $dirprefix .= "/" if defined $dirprefix;
4050                $dirprefix .= $part;
4051                print $cgi->a({-href => href(project => undef,
4052                                             project_filter => $dirprefix,
4053                                             action => "project_list")},
4054                              esc_html($part)) . " / ";
4055        }
4056}
4057
4058sub print_nav_breadcrumbs {
4059        my %opts = @_;
4060
4061        for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4062                print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4063        }
4064        if (defined $project) {
4065                my @dirname = split '/', $project;
4066                my $projectbasename = pop @dirname;
4067                print_nav_breadcrumbs_path(@dirname);
4068                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4069                if (defined $action) {
4070                        my $action_print = $action ;
4071                        if (defined $opts{-action_extra}) {
4072                                $action_print = $cgi->a({-href => href(action=>$action)},
4073                                        $action);
4074                        }
4075                        print " / $action_print";
4076                }
4077                if (defined $opts{-action_extra}) {
4078                        print " / $opts{-action_extra}";
4079                }
4080                print "\n";
4081        } elsif (defined $project_filter) {
4082                print_nav_breadcrumbs_path(split '/', $project_filter);
4083        }
4084}
4085
4086sub print_search_form {
4087        if (!defined $searchtext) {
4088                $searchtext = "";
4089        }
4090        my $search_hash;
4091        if (defined $hash_base) {
4092                $search_hash = $hash_base;
4093        } elsif (defined $hash) {
4094                $search_hash = $hash;
4095        } else {
4096                $search_hash = "HEAD";
4097        }
4098        my $action = $my_uri;
4099        my $use_pathinfo = gitweb_check_feature('pathinfo');
4100        if ($use_pathinfo) {
4101                $action .= "/".esc_url($project);
4102        }
4103        print $cgi->start_form(-method => "get", -action => $action) .
4104              "<div class=\"search\">\n" .
4105              (!$use_pathinfo &&
4106              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4107              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4108              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4109              $cgi->popup_menu(-name => 'st', -default => 'commit',
4110                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4111              " " . $cgi->a({-href => href(action=>"search_help"),
4112                             -title => "search help" }, "?") . " search:\n",
4113              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4114              "<span title=\"Extended regular expression\">" .
4115              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4116                             -checked => $search_use_regexp) .
4117              "</span>" .
4118              "</div>" .
4119              $cgi->end_form() . "\n";
4120}
4121
4122sub git_header_html {
4123        my $status = shift || "200 OK";
4124        my $expires = shift;
4125        my %opts = @_;
4126
4127        my $title = get_page_title();
4128        my $content_type = get_content_type_html();
4129        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4130                           -status=> $status, -expires => $expires)
4131                unless ($opts{'-no_http_header'});
4132        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4133        print <<EOF;
4134<?xml version="1.0" encoding="utf-8"?>
4135<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4136<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4137<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4138<!-- git core binaries version $git_version -->
4139<head>
4140<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4141<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4142<meta name="robots" content="index, nofollow"/>
4143<title>$title</title>
4144EOF
4145        # the stylesheet, favicon etc urls won't work correctly with path_info
4146        # unless we set the appropriate base URL
4147        if ($ENV{'PATH_INFO'}) {
4148                print "<base href=\"".esc_url($base_url)."\" />\n";
4149        }
4150        print_header_links($status);
4151
4152        if (defined $site_html_head_string) {
4153                print to_utf8($site_html_head_string);
4154        }
4155
4156        print "</head>\n" .
4157              "<body>\n";
4158
4159        if (defined $site_header && -f $site_header) {
4160                insert_file($site_header);
4161        }
4162
4163        print "<div class=\"page_header\">\n";
4164        if (defined $logo) {
4165                print $cgi->a({-href => esc_url($logo_url),
4166                               -title => $logo_label},
4167                              $cgi->img({-src => esc_url($logo),
4168                                         -width => 72, -height => 27,
4169                                         -alt => "git",
4170                                         -class => "logo"}));
4171        }
4172        print_nav_breadcrumbs(%opts);
4173        print "</div>\n";
4174
4175        my $have_search = gitweb_check_feature('search');
4176        if (defined $project && $have_search) {
4177                print_search_form();
4178        }
4179}
4180
4181sub git_footer_html {
4182        my $feed_class = 'rss_logo';
4183
4184        print "<div class=\"page_footer\">\n";
4185        if (defined $project) {
4186                my $descr = git_get_project_description($project);
4187                if (defined $descr) {
4188                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4189                }
4190
4191                my %href_params = get_feed_info();
4192                if (!%href_params) {
4193                        $feed_class .= ' generic';
4194                }
4195                $href_params{'-title'} ||= 'log';
4196
4197                foreach my $format (qw(RSS Atom)) {
4198                        $href_params{'action'} = lc($format);
4199                        print $cgi->a({-href => href(%href_params),
4200                                      -title => "$href_params{'-title'} $format feed",
4201                                      -class => $feed_class}, $format)."\n";
4202                }
4203
4204        } else {
4205                print $cgi->a({-href => href(project=>undef, action=>"opml",
4206                                             project_filter => $project_filter),
4207                              -class => $feed_class}, "OPML") . " ";
4208                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4209                                             project_filter => $project_filter),
4210                              -class => $feed_class}, "TXT") . "\n";
4211        }
4212        print "</div>\n"; # class="page_footer"
4213
4214        if (defined $t0 && gitweb_check_feature('timed')) {
4215                print "<div id=\"generating_info\">\n";
4216                print 'This page took '.
4217                      '<span id="generating_time" class="time_span">'.
4218                      tv_interval($t0, [ gettimeofday() ]).
4219                      ' seconds </span>'.
4220                      ' and '.
4221                      '<span id="generating_cmd">'.
4222                      $number_of_git_cmds.
4223                      '</span> git commands '.
4224                      " to generate.\n";
4225                print "</div>\n"; # class="page_footer"
4226        }
4227
4228        if (defined $site_footer && -f $site_footer) {
4229                insert_file($site_footer);
4230        }
4231
4232        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4233        if (defined $action &&
4234            $action eq 'blame_incremental') {
4235                print qq!<script type="text/javascript">\n!.
4236                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4237                      qq!           "!. href() .qq!");\n!.
4238                      qq!</script>\n!;
4239        } else {
4240                my ($jstimezone, $tz_cookie, $datetime_class) =
4241                        gitweb_get_feature('javascript-timezone');
4242
4243                print qq!<script type="text/javascript">\n!.
4244                      qq!window.onload = function () {\n!;
4245                if (gitweb_check_feature('javascript-actions')) {
4246                        print qq!       fixLinks();\n!;
4247                }
4248                if ($jstimezone && $tz_cookie && $datetime_class) {
4249                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4250                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4251                }
4252                print qq!};\n!.
4253                      qq!</script>\n!;
4254        }
4255
4256        print "</body>\n" .
4257              "</html>";
4258}
4259
4260# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4261# Example: die_error(404, 'Hash not found')
4262# By convention, use the following status codes (as defined in RFC 2616):
4263# 400: Invalid or missing CGI parameters, or
4264#      requested object exists but has wrong type.
4265# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4266#      this server or project.
4267# 404: Requested object/revision/project doesn't exist.
4268# 500: The server isn't configured properly, or
4269#      an internal error occurred (e.g. failed assertions caused by bugs), or
4270#      an unknown error occurred (e.g. the git binary died unexpectedly).
4271# 503: The server is currently unavailable (because it is overloaded,
4272#      or down for maintenance).  Generally, this is a temporary state.
4273sub die_error {
4274        my $status = shift || 500;
4275        my $error = esc_html(shift) || "Internal Server Error";
4276        my $extra = shift;
4277        my %opts = @_;
4278
4279        my %http_responses = (
4280                400 => '400 Bad Request',
4281                403 => '403 Forbidden',
4282                404 => '404 Not Found',
4283                500 => '500 Internal Server Error',
4284                503 => '503 Service Unavailable',
4285        );
4286        git_header_html($http_responses{$status}, undef, %opts);
4287        print <<EOF;
4288<div class="page_body">
4289<br /><br />
4290$status - $error
4291<br />
4292EOF
4293        if (defined $extra) {
4294                print "<hr />\n" .
4295                      "$extra\n";
4296        }
4297        print "</div>\n";
4298
4299        git_footer_html();
4300        goto DONE_GITWEB
4301                unless ($opts{'-error_handler'});
4302}
4303
4304## ----------------------------------------------------------------------
4305## functions printing or outputting HTML: navigation
4306
4307sub git_print_page_nav {
4308        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4309        $extra = '' if !defined $extra; # pager or formats
4310
4311        my @navs = qw(summary shortlog log commit commitdiff tree);
4312        if ($suppress) {
4313                @navs = grep { $_ ne $suppress } @navs;
4314        }
4315
4316        my %arg = map { $_ => {action=>$_} } @navs;
4317        if (defined $head) {
4318                for (qw(commit commitdiff)) {
4319                        $arg{$_}{'hash'} = $head;
4320                }
4321                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4322                        for (qw(shortlog log)) {
4323                                $arg{$_}{'hash'} = $head;
4324                        }
4325                }
4326        }
4327
4328        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4329        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4330
4331        my @actions = gitweb_get_feature('actions');
4332        my %repl = (
4333                '%' => '%',
4334                'n' => $project,         # project name
4335                'f' => $git_dir,         # project path within filesystem
4336                'h' => $treehead || '',  # current hash ('h' parameter)
4337                'b' => $treebase || '',  # hash base ('hb' parameter)
4338        );
4339        while (@actions) {
4340                my ($label, $link, $pos) = splice(@actions,0,3);
4341                # insert
4342                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4343                # munch munch
4344                $link =~ s/%([%nfhb])/$repl{$1}/g;
4345                $arg{$label}{'_href'} = $link;
4346        }
4347
4348        print "<div class=\"page_nav\">\n" .
4349                (join " | ",
4350                 map { $_ eq $current ?
4351                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4352                 } @navs);
4353        print "<br/>\n$extra<br/>\n" .
4354              "</div>\n";
4355}
4356
4357# returns a submenu for the nagivation of the refs views (tags, heads,
4358# remotes) with the current view disabled and the remotes view only
4359# available if the feature is enabled
4360sub format_ref_views {
4361        my ($current) = @_;
4362        my @ref_views = qw{tags heads};
4363        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4364        return join " | ", map {
4365                $_ eq $current ? $_ :
4366                $cgi->a({-href => href(action=>$_)}, $_)
4367        } @ref_views
4368}
4369
4370sub format_paging_nav {
4371        my ($action, $page, $has_next_link) = @_;
4372        my $paging_nav;
4373
4374
4375        if ($page > 0) {
4376                $paging_nav .=
4377                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4378                        " &sdot; " .
4379                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4380                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4381        } else {
4382                $paging_nav .= "first &sdot; prev";
4383        }
4384
4385        if ($has_next_link) {
4386                $paging_nav .= " &sdot; " .
4387                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4388                                 -accesskey => "n", -title => "Alt-n"}, "next");
4389        } else {
4390                $paging_nav .= " &sdot; next";
4391        }
4392
4393        return $paging_nav;
4394}
4395
4396## ......................................................................
4397## functions printing or outputting HTML: div
4398
4399sub git_print_header_div {
4400        my ($action, $title, $hash, $hash_base) = @_;
4401        my %args = ();
4402
4403        $args{'action'} = $action;
4404        $args{'hash'} = $hash if $hash;
4405        $args{'hash_base'} = $hash_base if $hash_base;
4406
4407        print "<div class=\"header\">\n" .
4408              $cgi->a({-href => href(%args), -class => "title"},
4409              $title ? $title : $action) .
4410              "\n</div>\n";
4411}
4412
4413sub format_repo_url {
4414        my ($name, $url) = @_;
4415        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4416}
4417
4418# Group output by placing it in a DIV element and adding a header.
4419# Options for start_div() can be provided by passing a hash reference as the
4420# first parameter to the function.
4421# Options to git_print_header_div() can be provided by passing an array
4422# reference. This must follow the options to start_div if they are present.
4423# The content can be a scalar, which is output as-is, a scalar reference, which
4424# is output after html escaping, an IO handle passed either as *handle or
4425# *handle{IO}, or a function reference. In the latter case all following
4426# parameters will be taken as argument to the content function call.
4427sub git_print_section {
4428        my ($div_args, $header_args, $content);
4429        my $arg = shift;
4430        if (ref($arg) eq 'HASH') {
4431                $div_args = $arg;
4432                $arg = shift;
4433        }
4434        if (ref($arg) eq 'ARRAY') {
4435                $header_args = $arg;
4436                $arg = shift;
4437        }
4438        $content = $arg;
4439
4440        print $cgi->start_div($div_args);
4441        git_print_header_div(@$header_args);
4442
4443        if (ref($content) eq 'CODE') {
4444                $content->(@_);
4445        } elsif (ref($content) eq 'SCALAR') {
4446                print esc_html($$content);
4447        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4448                print <$content>;
4449        } elsif (!ref($content) && defined($content)) {
4450                print $content;
4451        }
4452
4453        print $cgi->end_div;
4454}
4455
4456sub format_timestamp_html {
4457        my $date = shift;
4458        my $strtime = $date->{'rfc2822'};
4459
4460        my (undef, undef, $datetime_class) =
4461                gitweb_get_feature('javascript-timezone');
4462        if ($datetime_class) {
4463                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4464        }
4465
4466        my $localtime_format = '(%02d:%02d %s)';
4467        if ($date->{'hour_local'} < 6) {
4468                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4469        }
4470        $strtime .= ' ' .
4471                    sprintf($localtime_format,
4472                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4473
4474        return $strtime;
4475}
4476
4477# Outputs the author name and date in long form
4478sub git_print_authorship {
4479        my $co = shift;
4480        my %opts = @_;
4481        my $tag = $opts{-tag} || 'div';
4482        my $author = $co->{'author_name'};
4483
4484        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4485        print "<$tag class=\"author_date\">" .
4486              format_search_author($author, "author", esc_html($author)) .
4487              " [".format_timestamp_html(\%ad)."]".
4488              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4489              "</$tag>\n";
4490}
4491
4492# Outputs table rows containing the full author or committer information,
4493# in the format expected for 'commit' view (& similar).
4494# Parameters are a commit hash reference, followed by the list of people
4495# to output information for. If the list is empty it defaults to both
4496# author and committer.
4497sub git_print_authorship_rows {
4498        my $co = shift;
4499        # too bad we can't use @people = @_ || ('author', 'committer')
4500        my @people = @_;
4501        @people = ('author', 'committer') unless @people;
4502        foreach my $who (@people) {
4503                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4504                print "<tr><td>$who</td><td>" .
4505                      format_search_author($co->{"${who}_name"}, $who,
4506                                           esc_html($co->{"${who}_name"})) . " " .
4507                      format_search_author($co->{"${who}_email"}, $who,
4508                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4509                      "</td><td rowspan=\"2\">" .
4510                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4511                      "</td></tr>\n" .
4512                      "<tr>" .
4513                      "<td></td><td>" .
4514                      format_timestamp_html(\%wd) .
4515                      "</td>" .
4516                      "</tr>\n";
4517        }
4518}
4519
4520sub git_print_page_path {
4521        my $name = shift;
4522        my $type = shift;
4523        my $hb = shift;
4524
4525
4526        print "<div class=\"page_path\">";
4527        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4528                      -title => 'tree root'}, to_utf8("[$project]"));
4529        print " / ";
4530        if (defined $name) {
4531                my @dirname = split '/', $name;
4532                my $basename = pop @dirname;
4533                my $fullname = '';
4534
4535                foreach my $dir (@dirname) {
4536                        $fullname .= ($fullname ? '/' : '') . $dir;
4537                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4538                                                     hash_base=>$hb),
4539                                      -title => $fullname}, esc_path($dir));
4540                        print " / ";
4541                }
4542                if (defined $type && $type eq 'blob') {
4543                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4544                                                     hash_base=>$hb),
4545                                      -title => $name}, esc_path($basename));
4546                } elsif (defined $type && $type eq 'tree') {
4547                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4548                                                     hash_base=>$hb),
4549                                      -title => $name}, esc_path($basename));
4550                        print " / ";
4551                } else {
4552                        print esc_path($basename);
4553                }
4554        }
4555        print "<br/></div>\n";
4556}
4557
4558sub git_print_log {
4559        my $log = shift;
4560        my %opts = @_;
4561
4562        if ($opts{'-remove_title'}) {
4563                # remove title, i.e. first line of log
4564                shift @$log;
4565        }
4566        # remove leading empty lines
4567        while (defined $log->[0] && $log->[0] eq "") {
4568                shift @$log;
4569        }
4570
4571        # print log
4572        my $skip_blank_line = 0;
4573        foreach my $line (@$log) {
4574                if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4575                        if (! $opts{'-remove_signoff'}) {
4576                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4577                                $skip_blank_line = 1;
4578                        }
4579                        next;
4580                }
4581
4582                if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4583                        if (! $opts{'-remove_signoff'}) {
4584                                print "<span class=\"signoff\">" . esc_html($1) . ": " .
4585                                        "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4586                                        "</span><br/>\n";
4587                                $skip_blank_line = 1;
4588                        }
4589                        next;
4590                }
4591
4592                # print only one empty line
4593                # do not print empty line after signoff
4594                if ($line eq "") {
4595                        next if ($skip_blank_line);
4596                        $skip_blank_line = 1;
4597                } else {
4598                        $skip_blank_line = 0;
4599                }
4600
4601                print format_log_line_html($line) . "<br/>\n";
4602        }
4603
4604        if ($opts{'-final_empty_line'}) {
4605                # end with single empty line
4606                print "<br/>\n" unless $skip_blank_line;
4607        }
4608}
4609
4610# return link target (what link points to)
4611sub git_get_link_target {
4612        my $hash = shift;
4613        my $link_target;
4614
4615        # read link
4616        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4617                or return;
4618        {
4619                local $/ = undef;
4620                $link_target = <$fd>;
4621        }
4622        close $fd
4623                or return;
4624
4625        return $link_target;
4626}
4627
4628# given link target, and the directory (basedir) the link is in,
4629# return target of link relative to top directory (top tree);
4630# return undef if it is not possible (including absolute links).
4631sub normalize_link_target {
4632        my ($link_target, $basedir) = @_;
4633
4634        # absolute symlinks (beginning with '/') cannot be normalized
4635        return if (substr($link_target, 0, 1) eq '/');
4636
4637        # normalize link target to path from top (root) tree (dir)
4638        my $path;
4639        if ($basedir) {
4640                $path = $basedir . '/' . $link_target;
4641        } else {
4642                # we are in top (root) tree (dir)
4643                $path = $link_target;
4644        }
4645
4646        # remove //, /./, and /../
4647        my @path_parts;
4648        foreach my $part (split('/', $path)) {
4649                # discard '.' and ''
4650                next if (!$part || $part eq '.');
4651                # handle '..'
4652                if ($part eq '..') {
4653                        if (@path_parts) {
4654                                pop @path_parts;
4655                        } else {
4656                                # link leads outside repository (outside top dir)
4657                                return;
4658                        }
4659                } else {
4660                        push @path_parts, $part;
4661                }
4662        }
4663        $path = join('/', @path_parts);
4664
4665        return $path;
4666}
4667
4668# print tree entry (row of git_tree), but without encompassing <tr> element
4669sub git_print_tree_entry {
4670        my ($t, $basedir, $hash_base, $have_blame) = @_;
4671
4672        my %base_key = ();
4673        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4674
4675        # The format of a table row is: mode list link.  Where mode is
4676        # the mode of the entry, list is the name of the entry, an href,
4677        # and link is the action links of the entry.
4678
4679        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4680        if (exists $t->{'size'}) {
4681                print "<td class=\"size\">$t->{'size'}</td>\n";
4682        }
4683        if ($t->{'type'} eq "blob") {
4684                print "<td class=\"list\">" .
4685                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4686                                               file_name=>"$basedir$t->{'name'}", %base_key),
4687                                -class => "list"}, esc_path($t->{'name'}));
4688                if (S_ISLNK(oct $t->{'mode'})) {
4689                        my $link_target = git_get_link_target($t->{'hash'});
4690                        if ($link_target) {
4691                                my $norm_target = normalize_link_target($link_target, $basedir);
4692                                if (defined $norm_target) {
4693                                        print " -> " .
4694                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4695                                                                     file_name=>$norm_target),
4696                                                       -title => $norm_target}, esc_path($link_target));
4697                                } else {
4698                                        print " -> " . esc_path($link_target);
4699                                }
4700                        }
4701                }
4702                print "</td>\n";
4703                print "<td class=\"link\">";
4704                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4705                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4706                              "blob");
4707                if ($have_blame) {
4708                        print " | " .
4709                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4710                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4711                                      "blame");
4712                }
4713                if (defined $hash_base) {
4714                        print " | " .
4715                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4716                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4717                                      "history");
4718                }
4719                print " | " .
4720                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4721                                               file_name=>"$basedir$t->{'name'}")},
4722                                "raw");
4723                print "</td>\n";
4724
4725        } elsif ($t->{'type'} eq "tree") {
4726                print "<td class=\"list\">";
4727                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4728                                             file_name=>"$basedir$t->{'name'}",
4729                                             %base_key)},
4730                              esc_path($t->{'name'}));
4731                print "</td>\n";
4732                print "<td class=\"link\">";
4733                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4734                                             file_name=>"$basedir$t->{'name'}",
4735                                             %base_key)},
4736                              "tree");
4737                if (defined $hash_base) {
4738                        print " | " .
4739                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4740                                                     file_name=>"$basedir$t->{'name'}")},
4741                                      "history");
4742                }
4743                print "</td>\n";
4744        } else {
4745                # unknown object: we can only present history for it
4746                # (this includes 'commit' object, i.e. submodule support)
4747                print "<td class=\"list\">" .
4748                      esc_path($t->{'name'}) .
4749                      "</td>\n";
4750                print "<td class=\"link\">";
4751                if (defined $hash_base) {
4752                        print $cgi->a({-href => href(action=>"history",
4753                                                     hash_base=>$hash_base,
4754                                                     file_name=>"$basedir$t->{'name'}")},
4755                                      "history");
4756                }
4757                print "</td>\n";
4758        }
4759}
4760
4761## ......................................................................
4762## functions printing large fragments of HTML
4763
4764# get pre-image filenames for merge (combined) diff
4765sub fill_from_file_info {
4766        my ($diff, @parents) = @_;
4767
4768        $diff->{'from_file'} = [ ];
4769        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4770        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4771                if ($diff->{'status'}[$i] eq 'R' ||
4772                    $diff->{'status'}[$i] eq 'C') {
4773                        $diff->{'from_file'}[$i] =
4774                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4775                }
4776        }
4777
4778        return $diff;
4779}
4780
4781# is current raw difftree line of file deletion
4782sub is_deleted {
4783        my $diffinfo = shift;
4784
4785        return $diffinfo->{'to_id'} eq ('0' x 40);
4786}
4787
4788# does patch correspond to [previous] difftree raw line
4789# $diffinfo  - hashref of parsed raw diff format
4790# $patchinfo - hashref of parsed patch diff format
4791#              (the same keys as in $diffinfo)
4792sub is_patch_split {
4793        my ($diffinfo, $patchinfo) = @_;
4794
4795        return defined $diffinfo && defined $patchinfo
4796                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4797}
4798
4799
4800sub git_difftree_body {
4801        my ($difftree, $hash, @parents) = @_;
4802        my ($parent) = $parents[0];
4803        my $have_blame = gitweb_check_feature('blame');
4804        print "<div class=\"list_head\">\n";
4805        if ($#{$difftree} > 10) {
4806                print(($#{$difftree} + 1) . " files changed:\n");
4807        }
4808        print "</div>\n";
4809
4810        print "<table class=\"" .
4811              (@parents > 1 ? "combined " : "") .
4812              "diff_tree\">\n";
4813
4814        # header only for combined diff in 'commitdiff' view
4815        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4816        if ($has_header) {
4817                # table header
4818                print "<thead><tr>\n" .
4819                       "<th></th><th></th>\n"; # filename, patchN link
4820                for (my $i = 0; $i < @parents; $i++) {
4821                        my $par = $parents[$i];
4822                        print "<th>" .
4823                              $cgi->a({-href => href(action=>"commitdiff",
4824                                                     hash=>$hash, hash_parent=>$par),
4825                                       -title => 'commitdiff to parent number ' .
4826                                                  ($i+1) . ': ' . substr($par,0,7)},
4827                                      $i+1) .
4828                              "&nbsp;</th>\n";
4829                }
4830                print "</tr></thead>\n<tbody>\n";
4831        }
4832
4833        my $alternate = 1;
4834        my $patchno = 0;
4835        foreach my $line (@{$difftree}) {
4836                my $diff = parsed_difftree_line($line);
4837
4838                if ($alternate) {
4839                        print "<tr class=\"dark\">\n";
4840                } else {
4841                        print "<tr class=\"light\">\n";
4842                }
4843                $alternate ^= 1;
4844
4845                if (exists $diff->{'nparents'}) { # combined diff
4846
4847                        fill_from_file_info($diff, @parents)
4848                                unless exists $diff->{'from_file'};
4849
4850                        if (!is_deleted($diff)) {
4851                                # file exists in the result (child) commit
4852                                print "<td>" .
4853                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4854                                                             file_name=>$diff->{'to_file'},
4855                                                             hash_base=>$hash),
4856                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4857                                      "</td>\n";
4858                        } else {
4859                                print "<td>" .
4860                                      esc_path($diff->{'to_file'}) .
4861                                      "</td>\n";
4862                        }
4863
4864                        if ($action eq 'commitdiff') {
4865                                # link to patch
4866                                $patchno++;
4867                                print "<td class=\"link\">" .
4868                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4869                                              "patch") .
4870                                      " | " .
4871                                      "</td>\n";
4872                        }
4873
4874                        my $has_history = 0;
4875                        my $not_deleted = 0;
4876                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4877                                my $hash_parent = $parents[$i];
4878                                my $from_hash = $diff->{'from_id'}[$i];
4879                                my $from_path = $diff->{'from_file'}[$i];
4880                                my $status = $diff->{'status'}[$i];
4881
4882                                $has_history ||= ($status ne 'A');
4883                                $not_deleted ||= ($status ne 'D');
4884
4885                                if ($status eq 'A') {
4886                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4887                                } elsif ($status eq 'D') {
4888                                        print "<td class=\"link\">" .
4889                                              $cgi->a({-href => href(action=>"blob",
4890                                                                     hash_base=>$hash,
4891                                                                     hash=>$from_hash,
4892                                                                     file_name=>$from_path)},
4893                                                      "blob" . ($i+1)) .
4894                                              " | </td>\n";
4895                                } else {
4896                                        if ($diff->{'to_id'} eq $from_hash) {
4897                                                print "<td class=\"link nochange\">";
4898                                        } else {
4899                                                print "<td class=\"link\">";
4900                                        }
4901                                        print $cgi->a({-href => href(action=>"blobdiff",
4902                                                                     hash=>$diff->{'to_id'},
4903                                                                     hash_parent=>$from_hash,
4904                                                                     hash_base=>$hash,
4905                                                                     hash_parent_base=>$hash_parent,
4906                                                                     file_name=>$diff->{'to_file'},
4907                                                                     file_parent=>$from_path)},
4908                                                      "diff" . ($i+1)) .
4909                                              " | </td>\n";
4910                                }
4911                        }
4912
4913                        print "<td class=\"link\">";
4914                        if ($not_deleted) {
4915                                print $cgi->a({-href => href(action=>"blob",
4916                                                             hash=>$diff->{'to_id'},
4917                                                             file_name=>$diff->{'to_file'},
4918                                                             hash_base=>$hash)},
4919                                              "blob");
4920                                print " | " if ($has_history);
4921                        }
4922                        if ($has_history) {
4923                                print $cgi->a({-href => href(action=>"history",
4924                                                             file_name=>$diff->{'to_file'},
4925                                                             hash_base=>$hash)},
4926                                              "history");
4927                        }
4928                        print "</td>\n";
4929
4930                        print "</tr>\n";
4931                        next; # instead of 'else' clause, to avoid extra indent
4932                }
4933                # else ordinary diff
4934
4935                my ($to_mode_oct, $to_mode_str, $to_file_type);
4936                my ($from_mode_oct, $from_mode_str, $from_file_type);
4937                if ($diff->{'to_mode'} ne ('0' x 6)) {
4938                        $to_mode_oct = oct $diff->{'to_mode'};
4939                        if (S_ISREG($to_mode_oct)) { # only for regular file
4940                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4941                        }
4942                        $to_file_type = file_type($diff->{'to_mode'});
4943                }
4944                if ($diff->{'from_mode'} ne ('0' x 6)) {
4945                        $from_mode_oct = oct $diff->{'from_mode'};
4946                        if (S_ISREG($from_mode_oct)) { # only for regular file
4947                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4948                        }
4949                        $from_file_type = file_type($diff->{'from_mode'});
4950                }
4951
4952                if ($diff->{'status'} eq "A") { # created
4953                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4954                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4955                        $mode_chng   .= "]</span>";
4956                        print "<td>";
4957                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4958                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4959                                      -class => "list"}, esc_path($diff->{'file'}));
4960                        print "</td>\n";
4961                        print "<td>$mode_chng</td>\n";
4962                        print "<td class=\"link\">";
4963                        if ($action eq 'commitdiff') {
4964                                # link to patch
4965                                $patchno++;
4966                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4967                                              "patch") .
4968                                      " | ";
4969                        }
4970                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4971                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4972                                      "blob");
4973                        print "</td>\n";
4974
4975                } elsif ($diff->{'status'} eq "D") { # deleted
4976                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4977                        print "<td>";
4978                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4979                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4980                                       -class => "list"}, esc_path($diff->{'file'}));
4981                        print "</td>\n";
4982                        print "<td>$mode_chng</td>\n";
4983                        print "<td class=\"link\">";
4984                        if ($action eq 'commitdiff') {
4985                                # link to patch
4986                                $patchno++;
4987                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4988                                              "patch") .
4989                                      " | ";
4990                        }
4991                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4992                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4993                                      "blob") . " | ";
4994                        if ($have_blame) {
4995                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4996                                                             file_name=>$diff->{'file'})},
4997                                              "blame") . " | ";
4998                        }
4999                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5000                                                     file_name=>$diff->{'file'})},
5001                                      "history");
5002                        print "</td>\n";
5003
5004                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5005                        my $mode_chnge = "";
5006                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5007                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5008                                if ($from_file_type ne $to_file_type) {
5009                                        $mode_chnge .= " from $from_file_type to $to_file_type";
5010                                }
5011                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5012                                        if ($from_mode_str && $to_mode_str) {
5013                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5014                                        } elsif ($to_mode_str) {
5015                                                $mode_chnge .= " mode: $to_mode_str";
5016                                        }
5017                                }
5018                                $mode_chnge .= "]</span>\n";
5019                        }
5020                        print "<td>";
5021                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5022                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
5023                                      -class => "list"}, esc_path($diff->{'file'}));
5024                        print "</td>\n";
5025                        print "<td>$mode_chnge</td>\n";
5026                        print "<td class=\"link\">";
5027                        if ($action eq 'commitdiff') {
5028                                # link to patch
5029                                $patchno++;
5030                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5031                                              "patch") .
5032                                      " | ";
5033                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5034                                # "commit" view and modified file (not onlu mode changed)
5035                                print $cgi->a({-href => href(action=>"blobdiff",
5036                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5037                                                             hash_base=>$hash, hash_parent_base=>$parent,
5038                                                             file_name=>$diff->{'file'})},
5039                                              "diff") .
5040                                      " | ";
5041                        }
5042                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5043                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
5044                                       "blob") . " | ";
5045                        if ($have_blame) {
5046                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5047                                                             file_name=>$diff->{'file'})},
5048                                              "blame") . " | ";
5049                        }
5050                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5051                                                     file_name=>$diff->{'file'})},
5052                                      "history");
5053                        print "</td>\n";
5054
5055                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5056                        my %status_name = ('R' => 'moved', 'C' => 'copied');
5057                        my $nstatus = $status_name{$diff->{'status'}};
5058                        my $mode_chng = "";
5059                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5060                                # mode also for directories, so we cannot use $to_mode_str
5061                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5062                        }
5063                        print "<td>" .
5064                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5065                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5066                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5067                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5068                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5069                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5070                                      -class => "list"}, esc_path($diff->{'from_file'})) .
5071                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5072                              "<td class=\"link\">";
5073                        if ($action eq 'commitdiff') {
5074                                # link to patch
5075                                $patchno++;
5076                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5077                                              "patch") .
5078                                      " | ";
5079                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5080                                # "commit" view and modified file (not only pure rename or copy)
5081                                print $cgi->a({-href => href(action=>"blobdiff",
5082                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5083                                                             hash_base=>$hash, hash_parent_base=>$parent,
5084                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5085                                              "diff") .
5086                                      " | ";
5087                        }
5088                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5089                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5090                                      "blob") . " | ";
5091                        if ($have_blame) {
5092                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5093                                                             file_name=>$diff->{'to_file'})},
5094                                              "blame") . " | ";
5095                        }
5096                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5097                                                    file_name=>$diff->{'to_file'})},
5098                                      "history");
5099                        print "</td>\n";
5100
5101                } # we should not encounter Unmerged (U) or Unknown (X) status
5102                print "</tr>\n";
5103        }
5104        print "</tbody>" if $has_header;
5105        print "</table>\n";
5106}
5107
5108# Print context lines and then rem/add lines in a side-by-side manner.
5109sub print_sidebyside_diff_lines {
5110        my ($ctx, $rem, $add) = @_;
5111
5112        # print context block before add/rem block
5113        if (@$ctx) {
5114                print join '',
5115                        '<div class="chunk_block ctx">',
5116                                '<div class="old">',
5117                                @$ctx,
5118                                '</div>',
5119                                '<div class="new">',
5120                                @$ctx,
5121                                '</div>',
5122                        '</div>';
5123        }
5124
5125        if (!@$add) {
5126                # pure removal
5127                print join '',
5128                        '<div class="chunk_block rem">',
5129                                '<div class="old">',
5130                                @$rem,
5131                                '</div>',
5132                        '</div>';
5133        } elsif (!@$rem) {
5134                # pure addition
5135                print join '',
5136                        '<div class="chunk_block add">',
5137                                '<div class="new">',
5138                                @$add,
5139                                '</div>',
5140                        '</div>';
5141        } else {
5142                print join '',
5143                        '<div class="chunk_block chg">',
5144                                '<div class="old">',
5145                                @$rem,
5146                                '</div>',
5147                                '<div class="new">',
5148                                @$add,
5149                                '</div>',
5150                        '</div>';
5151        }
5152}
5153
5154# Print context lines and then rem/add lines in inline manner.
5155sub print_inline_diff_lines {
5156        my ($ctx, $rem, $add) = @_;
5157
5158        print @$ctx, @$rem, @$add;
5159}
5160
5161# Format removed and added line, mark changed part and HTML-format them.
5162# Implementation is based on contrib/diff-highlight
5163sub format_rem_add_lines_pair {
5164        my ($rem, $add, $num_parents) = @_;
5165
5166        # We need to untabify lines before split()'ing them;
5167        # otherwise offsets would be invalid.
5168        chomp $rem;
5169        chomp $add;
5170        $rem = untabify($rem);
5171        $add = untabify($add);
5172
5173        my @rem = split(//, $rem);
5174        my @add = split(//, $add);
5175        my ($esc_rem, $esc_add);
5176        # Ignore leading +/- characters for each parent.
5177        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5178        my ($prefix_has_nonspace, $suffix_has_nonspace);
5179
5180        my $shorter = (@rem < @add) ? @rem : @add;
5181        while ($prefix_len < $shorter) {
5182                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5183
5184                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5185                $prefix_len++;
5186        }
5187
5188        while ($prefix_len + $suffix_len < $shorter) {
5189                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5190
5191                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5192                $suffix_len++;
5193        }
5194
5195        # Mark lines that are different from each other, but have some common
5196        # part that isn't whitespace.  If lines are completely different, don't
5197        # mark them because that would make output unreadable, especially if
5198        # diff consists of multiple lines.
5199        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5200                $esc_rem = esc_html_hl_regions($rem, 'marked',
5201                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5202                $esc_add = esc_html_hl_regions($add, 'marked',
5203                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5204        } else {
5205                $esc_rem = esc_html($rem, -nbsp=>1);
5206                $esc_add = esc_html($add, -nbsp=>1);
5207        }
5208
5209        return format_diff_line(\$esc_rem, 'rem'),
5210               format_diff_line(\$esc_add, 'add');
5211}
5212
5213# HTML-format diff context, removed and added lines.
5214sub format_ctx_rem_add_lines {
5215        my ($ctx, $rem, $add, $num_parents) = @_;
5216        my (@new_ctx, @new_rem, @new_add);
5217        my $can_highlight = 0;
5218        my $is_combined = ($num_parents > 1);
5219
5220        # Highlight if every removed line has a corresponding added line.
5221        if (@$add > 0 && @$add == @$rem) {
5222                $can_highlight = 1;
5223
5224                # Highlight lines in combined diff only if the chunk contains
5225                # diff between the same version, e.g.
5226                #
5227                #    - a
5228                #   -  b
5229                #    + c
5230                #   +  d
5231                #
5232                # Otherwise the highlightling would be confusing.
5233                if ($is_combined) {
5234                        for (my $i = 0; $i < @$add; $i++) {
5235                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5236                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5237
5238                                $prefix_rem =~ s/-/+/g;
5239
5240                                if ($prefix_rem ne $prefix_add) {
5241                                        $can_highlight = 0;
5242                                        last;
5243                                }
5244                        }
5245                }
5246        }
5247
5248        if ($can_highlight) {
5249                for (my $i = 0; $i < @$add; $i++) {
5250                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5251                                $rem->[$i], $add->[$i], $num_parents);
5252                        push @new_rem, $line_rem;
5253                        push @new_add, $line_add;
5254                }
5255        } else {
5256                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5257                @new_add = map { format_diff_line($_, 'add') } @$add;
5258        }
5259
5260        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5261
5262        return (\@new_ctx, \@new_rem, \@new_add);
5263}
5264
5265# Print context lines and then rem/add lines.
5266sub print_diff_lines {
5267        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5268        my $is_combined = $num_parents > 1;
5269
5270        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5271                $num_parents);
5272
5273        if ($diff_style eq 'sidebyside' && !$is_combined) {
5274                print_sidebyside_diff_lines($ctx, $rem, $add);
5275        } else {
5276                # default 'inline' style and unknown styles
5277                print_inline_diff_lines($ctx, $rem, $add);
5278        }
5279}
5280
5281sub print_diff_chunk {
5282        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5283        my (@ctx, @rem, @add);
5284
5285        # The class of the previous line.
5286        my $prev_class = '';
5287
5288        return unless @chunk;
5289
5290        # incomplete last line might be among removed or added lines,
5291        # or both, or among context lines: find which
5292        for (my $i = 1; $i < @chunk; $i++) {
5293                if ($chunk[$i][0] eq 'incomplete') {
5294                        $chunk[$i][0] = $chunk[$i-1][0];
5295                }
5296        }
5297
5298        # guardian
5299        push @chunk, ["", ""];
5300
5301        foreach my $line_info (@chunk) {
5302                my ($class, $line) = @$line_info;
5303
5304                # print chunk headers
5305                if ($class && $class eq 'chunk_header') {
5306                        print format_diff_line($line, $class, $from, $to);
5307                        next;
5308                }
5309
5310                ## print from accumulator when have some add/rem lines or end
5311                # of chunk (flush context lines), or when have add and rem
5312                # lines and new block is reached (otherwise add/rem lines could
5313                # be reordered)
5314                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5315                    (@rem && @add && $class ne $prev_class)) {
5316                        print_diff_lines(\@ctx, \@rem, \@add,
5317                                         $diff_style, $num_parents);
5318                        @ctx = @rem = @add = ();
5319                }
5320
5321                ## adding lines to accumulator
5322                # guardian value
5323                last unless $line;
5324                # rem, add or change
5325                if ($class eq 'rem') {
5326                        push @rem, $line;
5327                } elsif ($class eq 'add') {
5328                        push @add, $line;
5329                }
5330                # context line
5331                if ($class eq 'ctx') {
5332                        push @ctx, $line;
5333                }
5334
5335                $prev_class = $class;
5336        }
5337}
5338
5339sub git_patchset_body {
5340        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5341        my ($hash_parent) = $hash_parents[0];
5342
5343        my $is_combined = (@hash_parents > 1);
5344        my $patch_idx = 0;
5345        my $patch_number = 0;
5346        my $patch_line;
5347        my $diffinfo;
5348        my $to_name;
5349        my (%from, %to);
5350        my @chunk; # for side-by-side diff
5351
5352        print "<div class=\"patchset\">\n";
5353
5354        # skip to first patch
5355        while ($patch_line = <$fd>) {
5356                chomp $patch_line;
5357
5358                last if ($patch_line =~ m/^diff /);
5359        }
5360
5361 PATCH:
5362        while ($patch_line) {
5363
5364                # parse "git diff" header line
5365                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5366                        # $1 is from_name, which we do not use
5367                        $to_name = unquote($2);
5368                        $to_name =~ s!^b/!!;
5369                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5370                        # $1 is 'cc' or 'combined', which we do not use
5371                        $to_name = unquote($2);
5372                } else {
5373                        $to_name = undef;
5374                }
5375
5376                # check if current patch belong to current raw line
5377                # and parse raw git-diff line if needed
5378                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5379                        # this is continuation of a split patch
5380                        print "<div class=\"patch cont\">\n";
5381                } else {
5382                        # advance raw git-diff output if needed
5383                        $patch_idx++ if defined $diffinfo;
5384
5385                        # read and prepare patch information
5386                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5387
5388                        # compact combined diff output can have some patches skipped
5389                        # find which patch (using pathname of result) we are at now;
5390                        if ($is_combined) {
5391                                while ($to_name ne $diffinfo->{'to_file'}) {
5392                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5393                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5394                                              "</div>\n";  # class="patch"
5395
5396                                        $patch_idx++;
5397                                        $patch_number++;
5398
5399                                        last if $patch_idx > $#$difftree;
5400                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5401                                }
5402                        }
5403
5404                        # modifies %from, %to hashes
5405                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5406
5407                        # this is first patch for raw difftree line with $patch_idx index
5408                        # we index @$difftree array from 0, but number patches from 1
5409                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5410                }
5411
5412                # git diff header
5413                #assert($patch_line =~ m/^diff /) if DEBUG;
5414                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5415                $patch_number++;
5416                # print "git diff" header
5417                print format_git_diff_header_line($patch_line, $diffinfo,
5418                                                  \%from, \%to);
5419
5420                # print extended diff header
5421                print "<div class=\"diff extended_header\">\n";
5422        EXTENDED_HEADER:
5423                while ($patch_line = <$fd>) {
5424                        chomp $patch_line;
5425
5426                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5427
5428                        print format_extended_diff_header_line($patch_line, $diffinfo,
5429                                                               \%from, \%to);
5430                }
5431                print "</div>\n"; # class="diff extended_header"
5432
5433                # from-file/to-file diff header
5434                if (! $patch_line) {
5435                        print "</div>\n"; # class="patch"
5436                        last PATCH;
5437                }
5438                next PATCH if ($patch_line =~ m/^diff /);
5439                #assert($patch_line =~ m/^---/) if DEBUG;
5440
5441                my $last_patch_line = $patch_line;
5442                $patch_line = <$fd>;
5443                chomp $patch_line;
5444                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5445
5446                print format_diff_from_to_header($last_patch_line, $patch_line,
5447                                                 $diffinfo, \%from, \%to,
5448                                                 @hash_parents);
5449
5450                # the patch itself
5451        LINE:
5452                while ($patch_line = <$fd>) {
5453                        chomp $patch_line;
5454
5455                        next PATCH if ($patch_line =~ m/^diff /);
5456
5457                        my $class = diff_line_class($patch_line, \%from, \%to);
5458
5459                        if ($class eq 'chunk_header') {
5460                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5461                                @chunk = ();
5462                        }
5463
5464                        push @chunk, [ $class, $patch_line ];
5465                }
5466
5467        } continue {
5468                if (@chunk) {
5469                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5470                        @chunk = ();
5471                }
5472                print "</div>\n"; # class="patch"
5473        }
5474
5475        # for compact combined (--cc) format, with chunk and patch simplification
5476        # the patchset might be empty, but there might be unprocessed raw lines
5477        for (++$patch_idx if $patch_number > 0;
5478             $patch_idx < @$difftree;
5479             ++$patch_idx) {
5480                # read and prepare patch information
5481                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5482
5483                # generate anchor for "patch" links in difftree / whatchanged part
5484                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5485                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5486                      "</div>\n";  # class="patch"
5487
5488                $patch_number++;
5489        }
5490
5491        if ($patch_number == 0) {
5492                if (@hash_parents > 1) {
5493                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5494                } else {
5495                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5496                }
5497        }
5498
5499        print "</div>\n"; # class="patchset"
5500}
5501
5502# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5503
5504sub git_project_search_form {
5505        my ($searchtext, $search_use_regexp) = @_;
5506
5507        my $limit = '';
5508        if ($project_filter) {
5509                $limit = " in '$project_filter/'";
5510        }
5511
5512        print "<div class=\"projsearch\">\n";
5513        print $cgi->start_form(-method => 'get', -action => $my_uri) .
5514              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5515        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5516                if (defined $project_filter);
5517        print $cgi->textfield(-name => 's', -value => $searchtext,
5518                              -title => "Search project by name and description$limit",
5519                              -size => 60) . "\n" .
5520              "<span title=\"Extended regular expression\">" .
5521              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5522                             -checked => $search_use_regexp) .
5523              "</span>\n" .
5524              $cgi->submit(-name => 'btnS', -value => 'Search') .
5525              $cgi->end_form() . "\n" .
5526              $cgi->a({-href => href(project => undef, searchtext => undef,
5527                                     project_filter => $project_filter)},
5528                      esc_html("List all projects$limit")) . "<br />\n";
5529        print "</div>\n";
5530}
5531
5532# entry for given @keys needs filling if at least one of keys in list
5533# is not present in %$project_info
5534sub project_info_needs_filling {
5535        my ($project_info, @keys) = @_;
5536
5537        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5538        foreach my $key (@keys) {
5539                if (!exists $project_info->{$key}) {
5540                        return 1;
5541                }
5542        }
5543        return;
5544}
5545
5546# fills project list info (age, description, owner, category, forks, etc.)
5547# for each project in the list, removing invalid projects from
5548# returned list, or fill only specified info.
5549#
5550# Invalid projects are removed from the returned list if and only if you
5551# ask 'age' or 'age_string' to be filled, because they are the only fields
5552# that run unconditionally git command that requires repository, and
5553# therefore do always check if project repository is invalid.
5554#
5555# USAGE:
5556# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5557#   ensures that 'descr_long' and 'ctags' fields are filled
5558# * @project_list = fill_project_list_info(\@project_list)
5559#   ensures that all fields are filled (and invalid projects removed)
5560#
5561# NOTE: modifies $projlist, but does not remove entries from it
5562sub fill_project_list_info {
5563        my ($projlist, @wanted_keys) = @_;
5564        my @projects;
5565        my $filter_set = sub { return @_; };
5566        if (@wanted_keys) {
5567                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5568                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5569        }
5570
5571        my $show_ctags = gitweb_check_feature('ctags');
5572 PROJECT:
5573        foreach my $pr (@$projlist) {
5574                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5575                        my (@activity) = git_get_last_activity($pr->{'path'});
5576                        unless (@activity) {
5577                                next PROJECT;
5578                        }
5579                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5580                }
5581                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5582                        my $descr = git_get_project_description($pr->{'path'}) || "";
5583                        $descr = to_utf8($descr);
5584                        $pr->{'descr_long'} = $descr;
5585                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5586                }
5587                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5588                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5589                }
5590                if ($show_ctags &&
5591                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5592                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5593                }
5594                if ($projects_list_group_categories &&
5595                    project_info_needs_filling($pr, $filter_set->('category'))) {
5596                        my $cat = git_get_project_category($pr->{'path'}) ||
5597                                                           $project_list_default_category;
5598                        $pr->{'category'} = to_utf8($cat);
5599                }
5600
5601                push @projects, $pr;
5602        }
5603
5604        return @projects;
5605}
5606
5607sub sort_projects_list {
5608        my ($projlist, $order) = @_;
5609
5610        sub order_str {
5611                my $key = shift;
5612                return sub { $a->{$key} cmp $b->{$key} };
5613        }
5614
5615        sub order_num_then_undef {
5616                my $key = shift;
5617                return sub {
5618                        defined $a->{$key} ?
5619                                (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5620                                (defined $b->{$key} ? 1 : 0)
5621                };
5622        }
5623
5624        my %orderings = (
5625                project => order_str('path'),
5626                descr => order_str('descr_long'),
5627                owner => order_str('owner'),
5628                age => order_num_then_undef('age'),
5629        );
5630
5631        my $ordering = $orderings{$order};
5632        return defined $ordering ? sort $ordering @$projlist : @$projlist;
5633}
5634
5635# returns a hash of categories, containing the list of project
5636# belonging to each category
5637sub build_projlist_by_category {
5638        my ($projlist, $from, $to) = @_;
5639        my %categories;
5640
5641        $from = 0 unless defined $from;
5642        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5643
5644        for (my $i = $from; $i <= $to; $i++) {
5645                my $pr = $projlist->[$i];
5646                push @{$categories{ $pr->{'category'} }}, $pr;
5647        }
5648
5649        return wantarray ? %categories : \%categories;
5650}
5651
5652# print 'sort by' <th> element, generating 'sort by $name' replay link
5653# if that order is not selected
5654sub print_sort_th {
5655        print format_sort_th(@_);
5656}
5657
5658sub format_sort_th {
5659        my ($name, $order, $header) = @_;
5660        my $sort_th = "";
5661        $header ||= ucfirst($name);
5662
5663        if ($order eq $name) {
5664                $sort_th .= "<th>$header</th>\n";
5665        } else {
5666                $sort_th .= "<th>" .
5667                            $cgi->a({-href => href(-replay=>1, order=>$name),
5668                                     -class => "header"}, $header) .
5669                            "</th>\n";
5670        }
5671
5672        return $sort_th;
5673}
5674
5675sub git_project_list_rows {
5676        my ($projlist, $from, $to, $check_forks) = @_;
5677
5678        $from = 0 unless defined $from;
5679        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5680
5681        my $alternate = 1;
5682        for (my $i = $from; $i <= $to; $i++) {
5683                my $pr = $projlist->[$i];
5684
5685                if ($alternate) {
5686                        print "<tr class=\"dark\">\n";
5687                } else {
5688                        print "<tr class=\"light\">\n";
5689                }
5690                $alternate ^= 1;
5691
5692                if ($check_forks) {
5693                        print "<td>";
5694                        if ($pr->{'forks'}) {
5695                                my $nforks = scalar @{$pr->{'forks'}};
5696                                if ($nforks > 0) {
5697                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5698                                                       -title => "$nforks forks"}, "+");
5699                                } else {
5700                                        print $cgi->span({-title => "$nforks forks"}, "+");
5701                                }
5702                        }
5703                        print "</td>\n";
5704                }
5705                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5706                                        -class => "list"},
5707                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5708                      "</td>\n" .
5709                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5710                                        -class => "list",
5711                                        -title => $pr->{'descr_long'}},
5712                                        $search_regexp
5713                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5714                                                                    $pr->{'descr'}, $search_regexp)
5715                                        : esc_html($pr->{'descr'})) .
5716                      "</td>\n";
5717                unless ($omit_owner) {
5718                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5719                }
5720                unless ($omit_age_column) {
5721                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5722                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5723                }
5724                print"<td class=\"link\">" .
5725                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5726                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5727                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5728                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5729                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5730                      "</td>\n" .
5731                      "</tr>\n";
5732        }
5733}
5734
5735sub git_project_list_body {
5736        # actually uses global variable $project
5737        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5738        my @projects = @$projlist;
5739
5740        my $check_forks = gitweb_check_feature('forks');
5741        my $show_ctags  = gitweb_check_feature('ctags');
5742        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5743        $check_forks = undef
5744                if ($tagfilter || $search_regexp);
5745
5746        # filtering out forks before filling info allows to do less work
5747        @projects = filter_forks_from_projects_list(\@projects)
5748                if ($check_forks);
5749        # search_projects_list pre-fills required info
5750        @projects = search_projects_list(\@projects,
5751                                         'search_regexp' => $search_regexp,
5752                                         'tagfilter'  => $tagfilter)
5753                if ($tagfilter || $search_regexp);
5754        # fill the rest
5755        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5756        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5757        push @all_fields, 'owner' unless($omit_owner);
5758        @projects = fill_project_list_info(\@projects, @all_fields);
5759
5760        $order ||= $default_projects_order;
5761        $from = 0 unless defined $from;
5762        $to = $#projects if (!defined $to || $#projects < $to);
5763
5764        # short circuit
5765        if ($from > $to) {
5766                print "<center>\n".
5767                      "<b>No such projects found</b><br />\n".
5768                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5769                      "</center>\n<br />\n";
5770                return;
5771        }
5772
5773        @projects = sort_projects_list(\@projects, $order);
5774
5775        if ($show_ctags) {
5776                my $ctags = git_gather_all_ctags(\@projects);
5777                my $cloud = git_populate_project_tagcloud($ctags);
5778                print git_show_project_tagcloud($cloud, 64);
5779        }
5780
5781        print "<table class=\"project_list\">\n";
5782        unless ($no_header) {
5783                print "<tr>\n";
5784                if ($check_forks) {
5785                        print "<th></th>\n";
5786                }
5787                print_sort_th('project', $order, 'Project');
5788                print_sort_th('descr', $order, 'Description');
5789                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5790                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5791                print "<th></th>\n" . # for links
5792                      "</tr>\n";
5793        }
5794
5795        if ($projects_list_group_categories) {
5796                # only display categories with projects in the $from-$to window
5797                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5798                my %categories = build_projlist_by_category(\@projects, $from, $to);
5799                foreach my $cat (sort keys %categories) {
5800                        unless ($cat eq "") {
5801                                print "<tr>\n";
5802                                if ($check_forks) {
5803                                        print "<td></td>\n";
5804                                }
5805                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5806                                print "</tr>\n";
5807                        }
5808
5809                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5810                }
5811        } else {
5812                git_project_list_rows(\@projects, $from, $to, $check_forks);
5813        }
5814
5815        if (defined $extra) {
5816                print "<tr>\n";
5817                if ($check_forks) {
5818                        print "<td></td>\n";
5819                }
5820                print "<td colspan=\"5\">$extra</td>\n" .
5821                      "</tr>\n";
5822        }
5823        print "</table>\n";
5824}
5825
5826sub git_log_body {
5827        # uses global variable $project
5828        my ($commitlist, $from, $to, $refs, $extra) = @_;
5829
5830        $from = 0 unless defined $from;
5831        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5832
5833        for (my $i = 0; $i <= $to; $i++) {
5834                my %co = %{$commitlist->[$i]};
5835                next if !%co;
5836                my $commit = $co{'id'};
5837                my $ref = format_ref_marker($refs, $commit);
5838                git_print_header_div('commit',
5839                               "<span class=\"age\">$co{'age_string'}</span>" .
5840                               esc_html($co{'title'}) . $ref,
5841                               $commit);
5842                print "<div class=\"title_text\">\n" .
5843                      "<div class=\"log_link\">\n" .
5844                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5845                      " | " .
5846                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5847                      " | " .
5848                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5849                      "<br/>\n" .
5850                      "</div>\n";
5851                      git_print_authorship(\%co, -tag => 'span');
5852                      print "<br/>\n</div>\n";
5853
5854                print "<div class=\"log_body\">\n";
5855                git_print_log($co{'comment'}, -final_empty_line=> 1);
5856                print "</div>\n";
5857        }
5858        if ($extra) {
5859                print "<div class=\"page_nav\">\n";
5860                print "$extra\n";
5861                print "</div>\n";
5862        }
5863}
5864
5865sub git_shortlog_body {
5866        # uses global variable $project
5867        my ($commitlist, $from, $to, $refs, $extra) = @_;
5868
5869        $from = 0 unless defined $from;
5870        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5871
5872        print "<table class=\"shortlog\">\n";
5873        my $alternate = 1;
5874        for (my $i = $from; $i <= $to; $i++) {
5875                my %co = %{$commitlist->[$i]};
5876                my $commit = $co{'id'};
5877                my $ref = format_ref_marker($refs, $commit);
5878                if ($alternate) {
5879                        print "<tr class=\"dark\">\n";
5880                } else {
5881                        print "<tr class=\"light\">\n";
5882                }
5883                $alternate ^= 1;
5884                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5885                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5886                      format_author_html('td', \%co, 10) . "<td>";
5887                print format_subject_html($co{'title'}, $co{'title_short'},
5888                                          href(action=>"commit", hash=>$commit), $ref);
5889                print "</td>\n" .
5890                      "<td class=\"link\">" .
5891                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5892                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5893                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5894                my $snapshot_links = format_snapshot_links($commit);
5895                if (defined $snapshot_links) {
5896                        print " | " . $snapshot_links;
5897                }
5898                print "</td>\n" .
5899                      "</tr>\n";
5900        }
5901        if (defined $extra) {
5902                print "<tr>\n" .
5903                      "<td colspan=\"4\">$extra</td>\n" .
5904                      "</tr>\n";
5905        }
5906        print "</table>\n";
5907}
5908
5909sub git_history_body {
5910        # Warning: assumes constant type (blob or tree) during history
5911        my ($commitlist, $from, $to, $refs, $extra,
5912            $file_name, $file_hash, $ftype) = @_;
5913
5914        $from = 0 unless defined $from;
5915        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5916
5917        print "<table class=\"history\">\n";
5918        my $alternate = 1;
5919        for (my $i = $from; $i <= $to; $i++) {
5920                my %co = %{$commitlist->[$i]};
5921                if (!%co) {
5922                        next;
5923                }
5924                my $commit = $co{'id'};
5925
5926                my $ref = format_ref_marker($refs, $commit);
5927
5928                if ($alternate) {
5929                        print "<tr class=\"dark\">\n";
5930                } else {
5931                        print "<tr class=\"light\">\n";
5932                }
5933                $alternate ^= 1;
5934                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5935        # shortlog:   format_author_html('td', \%co, 10)
5936                      format_author_html('td', \%co, 15, 3) . "<td>";
5937                # originally git_history used chop_str($co{'title'}, 50)
5938                print format_subject_html($co{'title'}, $co{'title_short'},
5939                                          href(action=>"commit", hash=>$commit), $ref);
5940                print "</td>\n" .
5941                      "<td class=\"link\">" .
5942                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5943                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5944
5945                if ($ftype eq 'blob') {
5946                        my $blob_current = $file_hash;
5947                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5948                        if (defined $blob_current && defined $blob_parent &&
5949                                        $blob_current ne $blob_parent) {
5950                                print " | " .
5951                                        $cgi->a({-href => href(action=>"blobdiff",
5952                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5953                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5954                                                               file_name=>$file_name)},
5955                                                "diff to current");
5956                        }
5957                }
5958                print "</td>\n" .
5959                      "</tr>\n";
5960        }
5961        if (defined $extra) {
5962                print "<tr>\n" .
5963                      "<td colspan=\"4\">$extra</td>\n" .
5964                      "</tr>\n";
5965        }
5966        print "</table>\n";
5967}
5968
5969sub git_tags_body {
5970        # uses global variable $project
5971        my ($taglist, $from, $to, $extra) = @_;
5972        $from = 0 unless defined $from;
5973        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5974
5975        print "<table class=\"tags\">\n";
5976        my $alternate = 1;
5977        for (my $i = $from; $i <= $to; $i++) {
5978                my $entry = $taglist->[$i];
5979                my %tag = %$entry;
5980                my $comment = $tag{'subject'};
5981                my $comment_short;
5982                if (defined $comment) {
5983                        $comment_short = chop_str($comment, 30, 5);
5984                }
5985                if ($alternate) {
5986                        print "<tr class=\"dark\">\n";
5987                } else {
5988                        print "<tr class=\"light\">\n";
5989                }
5990                $alternate ^= 1;
5991                if (defined $tag{'age'}) {
5992                        print "<td><i>$tag{'age'}</i></td>\n";
5993                } else {
5994                        print "<td></td>\n";
5995                }
5996                print "<td>" .
5997                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5998                               -class => "list name"}, esc_html($tag{'name'})) .
5999                      "</td>\n" .
6000                      "<td>";
6001                if (defined $comment) {
6002                        print format_subject_html($comment, $comment_short,
6003                                                  href(action=>"tag", hash=>$tag{'id'}));
6004                }
6005                print "</td>\n" .
6006                      "<td class=\"selflink\">";
6007                if ($tag{'type'} eq "tag") {
6008                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6009                } else {
6010                        print "&nbsp;";
6011                }
6012                print "</td>\n" .
6013                      "<td class=\"link\">" . " | " .
6014                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6015                if ($tag{'reftype'} eq "commit") {
6016                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6017                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6018                } elsif ($tag{'reftype'} eq "blob") {
6019                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6020                }
6021                print "</td>\n" .
6022                      "</tr>";
6023        }
6024        if (defined $extra) {
6025                print "<tr>\n" .
6026                      "<td colspan=\"5\">$extra</td>\n" .
6027                      "</tr>\n";
6028        }
6029        print "</table>\n";
6030}
6031
6032sub git_heads_body {
6033        # uses global variable $project
6034        my ($headlist, $head_at, $from, $to, $extra) = @_;
6035        $from = 0 unless defined $from;
6036        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6037
6038        print "<table class=\"heads\">\n";
6039        my $alternate = 1;
6040        for (my $i = $from; $i <= $to; $i++) {
6041                my $entry = $headlist->[$i];
6042                my %ref = %$entry;
6043                my $curr = defined $head_at && $ref{'id'} eq $head_at;
6044                if ($alternate) {
6045                        print "<tr class=\"dark\">\n";
6046                } else {
6047                        print "<tr class=\"light\">\n";
6048                }
6049                $alternate ^= 1;
6050                print "<td><i>$ref{'age'}</i></td>\n" .
6051                      ($curr ? "<td class=\"current_head\">" : "<td>") .
6052                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6053                               -class => "list name"},esc_html($ref{'name'})) .
6054                      "</td>\n" .
6055                      "<td class=\"link\">" .
6056                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6057                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6058                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6059                      "</td>\n" .
6060                      "</tr>";
6061        }
6062        if (defined $extra) {
6063                print "<tr>\n" .
6064                      "<td colspan=\"3\">$extra</td>\n" .
6065                      "</tr>\n";
6066        }
6067        print "</table>\n";
6068}
6069
6070# Display a single remote block
6071sub git_remote_block {
6072        my ($remote, $rdata, $limit, $head) = @_;
6073
6074        my $heads = $rdata->{'heads'};
6075        my $fetch = $rdata->{'fetch'};
6076        my $push = $rdata->{'push'};
6077
6078        my $urls_table = "<table class=\"projects_list\">\n" ;
6079
6080        if (defined $fetch) {
6081                if ($fetch eq $push) {
6082                        $urls_table .= format_repo_url("URL", $fetch);
6083                } else {
6084                        $urls_table .= format_repo_url("Fetch URL", $fetch);
6085                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6086                }
6087        } elsif (defined $push) {
6088                $urls_table .= format_repo_url("Push URL", $push);
6089        } else {
6090                $urls_table .= format_repo_url("", "No remote URL");
6091        }
6092
6093        $urls_table .= "</table>\n";
6094
6095        my $dots;
6096        if (defined $limit && $limit < @$heads) {
6097                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6098        }
6099
6100        print $urls_table;
6101        git_heads_body($heads, $head, 0, $limit, $dots);
6102}
6103
6104# Display a list of remote names with the respective fetch and push URLs
6105sub git_remotes_list {
6106        my ($remotedata, $limit) = @_;
6107        print "<table class=\"heads\">\n";
6108        my $alternate = 1;
6109        my @remotes = sort keys %$remotedata;
6110
6111        my $limited = $limit && $limit < @remotes;
6112
6113        $#remotes = $limit - 1 if $limited;
6114
6115        while (my $remote = shift @remotes) {
6116                my $rdata = $remotedata->{$remote};
6117                my $fetch = $rdata->{'fetch'};
6118                my $push = $rdata->{'push'};
6119                if ($alternate) {
6120                        print "<tr class=\"dark\">\n";
6121                } else {
6122                        print "<tr class=\"light\">\n";
6123                }
6124                $alternate ^= 1;
6125                print "<td>" .
6126                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6127                               -class=> "list name"},esc_html($remote)) .
6128                      "</td>";
6129                print "<td class=\"link\">" .
6130                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6131                      " | " .
6132                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6133                      "</td>";
6134
6135                print "</tr>\n";
6136        }
6137
6138        if ($limited) {
6139                print "<tr>\n" .
6140                      "<td colspan=\"3\">" .
6141                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6142                      "</td>\n" . "</tr>\n";
6143        }
6144
6145        print "</table>";
6146}
6147
6148# Display remote heads grouped by remote, unless there are too many
6149# remotes, in which case we only display the remote names
6150sub git_remotes_body {
6151        my ($remotedata, $limit, $head) = @_;
6152        if ($limit and $limit < keys %$remotedata) {
6153                git_remotes_list($remotedata, $limit);
6154        } else {
6155                fill_remote_heads($remotedata);
6156                while (my ($remote, $rdata) = each %$remotedata) {
6157                        git_print_section({-class=>"remote", -id=>$remote},
6158                                ["remotes", $remote, $remote], sub {
6159                                        git_remote_block($remote, $rdata, $limit, $head);
6160                                });
6161                }
6162        }
6163}
6164
6165sub git_search_message {
6166        my %co = @_;
6167
6168        my $greptype;
6169        if ($searchtype eq 'commit') {
6170                $greptype = "--grep=";
6171        } elsif ($searchtype eq 'author') {
6172                $greptype = "--author=";
6173        } elsif ($searchtype eq 'committer') {
6174                $greptype = "--committer=";
6175        }
6176        $greptype .= $searchtext;
6177        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6178                                       $greptype, '--regexp-ignore-case',
6179                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6180
6181        my $paging_nav = '';
6182        if ($page > 0) {
6183                $paging_nav .=
6184                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6185                                "first") .
6186                        " &sdot; " .
6187                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6188                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6189        } else {
6190                $paging_nav .= "first &sdot; prev";
6191        }
6192        my $next_link = '';
6193        if ($#commitlist >= 100) {
6194                $next_link =
6195                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6196                                 -accesskey => "n", -title => "Alt-n"}, "next");
6197                $paging_nav .= " &sdot; $next_link";
6198        } else {
6199                $paging_nav .= " &sdot; next";
6200        }
6201
6202        git_header_html();
6203
6204        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6205        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6206        if ($page == 0 && !@commitlist) {
6207                print "<p>No match.</p>\n";
6208        } else {
6209                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6210        }
6211
6212        git_footer_html();
6213}
6214
6215sub git_search_changes {
6216        my %co = @_;
6217
6218        local $/ = "\n";
6219        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6220                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6221                ($search_use_regexp ? '--pickaxe-regex' : ())
6222                        or die_error(500, "Open git-log failed");
6223
6224        git_header_html();
6225
6226        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6227        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6228
6229        print "<table class=\"pickaxe search\">\n";
6230        my $alternate = 1;
6231        undef %co;
6232        my @files;
6233        while (my $line = <$fd>) {
6234                chomp $line;
6235                next unless $line;
6236
6237                my %set = parse_difftree_raw_line($line);
6238                if (defined $set{'commit'}) {
6239                        # finish previous commit
6240                        if (%co) {
6241                                print "</td>\n" .
6242                                      "<td class=\"link\">" .
6243                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6244                                              "commit") .
6245                                      " | " .
6246                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6247                                                             hash_base=>$co{'id'})},
6248                                              "tree") .
6249                                      "</td>\n" .
6250                                      "</tr>\n";
6251                        }
6252
6253                        if ($alternate) {
6254                                print "<tr class=\"dark\">\n";
6255                        } else {
6256                                print "<tr class=\"light\">\n";
6257                        }
6258                        $alternate ^= 1;
6259                        %co = parse_commit($set{'commit'});
6260                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6261                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6262                              "<td><i>$author</i></td>\n" .
6263                              "<td>" .
6264                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6265                                      -class => "list subject"},
6266                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6267                } elsif (defined $set{'to_id'}) {
6268                        next if ($set{'to_id'} =~ m/^0{40}$/);
6269
6270                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6271                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6272                                      -class => "list"},
6273                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6274                              "<br/>\n";
6275                }
6276        }
6277        close $fd;
6278
6279        # finish last commit (warning: repetition!)
6280        if (%co) {
6281                print "</td>\n" .
6282                      "<td class=\"link\">" .
6283                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6284                              "commit") .
6285                      " | " .
6286                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6287                                             hash_base=>$co{'id'})},
6288                              "tree") .
6289                      "</td>\n" .
6290                      "</tr>\n";
6291        }
6292
6293        print "</table>\n";
6294
6295        git_footer_html();
6296}
6297
6298sub git_search_files {
6299        my %co = @_;
6300
6301        local $/ = "\n";
6302        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6303                $search_use_regexp ? ('-E', '-i') : '-F',
6304                $searchtext, $co{'tree'}
6305                        or die_error(500, "Open git-grep failed");
6306
6307        git_header_html();
6308
6309        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6310        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6311
6312        print "<table class=\"grep_search\">\n";
6313        my $alternate = 1;
6314        my $matches = 0;
6315        my $lastfile = '';
6316        my $file_href;
6317        while (my $line = <$fd>) {
6318                chomp $line;
6319                my ($file, $lno, $ltext, $binary);
6320                last if ($matches++ > 1000);
6321                if ($line =~ /^Binary file (.+) matches$/) {
6322                        $file = $1;
6323                        $binary = 1;
6324                } else {
6325                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6326                        $file =~ s/^$co{'tree'}://;
6327                }
6328                if ($file ne $lastfile) {
6329                        $lastfile and print "</td></tr>\n";
6330                        if ($alternate++) {
6331                                print "<tr class=\"dark\">\n";
6332                        } else {
6333                                print "<tr class=\"light\">\n";
6334                        }
6335                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6336                                          file_name=>$file);
6337                        print "<td class=\"list\">".
6338                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6339                        print "</td><td>\n";
6340                        $lastfile = $file;
6341                }
6342                if ($binary) {
6343                        print "<div class=\"binary\">Binary file</div>\n";
6344                } else {
6345                        $ltext = untabify($ltext);
6346                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6347                                $ltext = esc_html($1, -nbsp=>1);
6348                                $ltext .= '<span class="match">';
6349                                $ltext .= esc_html($2, -nbsp=>1);
6350                                $ltext .= '</span>';
6351                                $ltext .= esc_html($3, -nbsp=>1);
6352                        } else {
6353                                $ltext = esc_html($ltext, -nbsp=>1);
6354                        }
6355                        print "<div class=\"pre\">" .
6356                                $cgi->a({-href => $file_href.'#l'.$lno,
6357                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6358                                ' ' .  $ltext . "</div>\n";
6359                }
6360        }
6361        if ($lastfile) {
6362                print "</td></tr>\n";
6363                if ($matches > 1000) {
6364                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6365                }
6366        } else {
6367                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6368        }
6369        close $fd;
6370
6371        print "</table>\n";
6372
6373        git_footer_html();
6374}
6375
6376sub git_search_grep_body {
6377        my ($commitlist, $from, $to, $extra) = @_;
6378        $from = 0 unless defined $from;
6379        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6380
6381        print "<table class=\"commit_search\">\n";
6382        my $alternate = 1;
6383        for (my $i = $from; $i <= $to; $i++) {
6384                my %co = %{$commitlist->[$i]};
6385                if (!%co) {
6386                        next;
6387                }
6388                my $commit = $co{'id'};
6389                if ($alternate) {
6390                        print "<tr class=\"dark\">\n";
6391                } else {
6392                        print "<tr class=\"light\">\n";
6393                }
6394                $alternate ^= 1;
6395                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6396                      format_author_html('td', \%co, 15, 5) .
6397                      "<td>" .
6398                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6399                               -class => "list subject"},
6400                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6401                my $comment = $co{'comment'};
6402                foreach my $line (@$comment) {
6403                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6404                                my ($lead, $match, $trail) = ($1, $2, $3);
6405                                $match = chop_str($match, 70, 5, 'center');
6406                                my $contextlen = int((80 - length($match))/2);
6407                                $contextlen = 30 if ($contextlen > 30);
6408                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6409                                $trail = chop_str($trail, $contextlen, 10, 'right');
6410
6411                                $lead  = esc_html($lead);
6412                                $match = esc_html($match);
6413                                $trail = esc_html($trail);
6414
6415                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6416                        }
6417                }
6418                print "</td>\n" .
6419                      "<td class=\"link\">" .
6420                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6421                      " | " .
6422                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6423                      " | " .
6424                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6425                print "</td>\n" .
6426                      "</tr>\n";
6427        }
6428        if (defined $extra) {
6429                print "<tr>\n" .
6430                      "<td colspan=\"3\">$extra</td>\n" .
6431                      "</tr>\n";
6432        }
6433        print "</table>\n";
6434}
6435
6436## ======================================================================
6437## ======================================================================
6438## actions
6439
6440sub git_project_list {
6441        my $order = $input_params{'order'};
6442        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6443                die_error(400, "Unknown order parameter");
6444        }
6445
6446        my @list = git_get_projects_list($project_filter, $strict_export);
6447        if (!@list) {
6448                die_error(404, "No projects found");
6449        }
6450
6451        git_header_html();
6452        if (defined $home_text && -f $home_text) {
6453                print "<div class=\"index_include\">\n";
6454                insert_file($home_text);
6455                print "</div>\n";
6456        }
6457
6458        git_project_search_form($searchtext, $search_use_regexp);
6459        git_project_list_body(\@list, $order);
6460        git_footer_html();
6461}
6462
6463sub git_forks {
6464        my $order = $input_params{'order'};
6465        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6466                die_error(400, "Unknown order parameter");
6467        }
6468
6469        my $filter = $project;
6470        $filter =~ s/\.git$//;
6471        my @list = git_get_projects_list($filter);
6472        if (!@list) {
6473                die_error(404, "No forks found");
6474        }
6475
6476        git_header_html();
6477        git_print_page_nav('','');
6478        git_print_header_div('summary', "$project forks");
6479        git_project_list_body(\@list, $order);
6480        git_footer_html();
6481}
6482
6483sub git_project_index {
6484        my @projects = git_get_projects_list($project_filter, $strict_export);
6485        if (!@projects) {
6486                die_error(404, "No projects found");
6487        }
6488
6489        print $cgi->header(
6490                -type => 'text/plain',
6491                -charset => 'utf-8',
6492                -content_disposition => 'inline; filename="index.aux"');
6493
6494        foreach my $pr (@projects) {
6495                if (!exists $pr->{'owner'}) {
6496                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6497                }
6498
6499                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6500                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6501                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6502                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6503                $path  =~ s/ /\+/g;
6504                $owner =~ s/ /\+/g;
6505
6506                print "$path $owner\n";
6507        }
6508}
6509
6510sub git_summary {
6511        my $descr = git_get_project_description($project) || "none";
6512        my %co = parse_commit("HEAD");
6513        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6514        my $head = $co{'id'};
6515        my $remote_heads = gitweb_check_feature('remote_heads');
6516
6517        my $owner = git_get_project_owner($project);
6518
6519        my $refs = git_get_references();
6520        # These get_*_list functions return one more to allow us to see if
6521        # there are more ...
6522        my @taglist  = git_get_tags_list(16);
6523        my @headlist = git_get_heads_list(16);
6524        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6525        my @forklist;
6526        my $check_forks = gitweb_check_feature('forks');
6527
6528        if ($check_forks) {
6529                # find forks of a project
6530                my $filter = $project;
6531                $filter =~ s/\.git$//;
6532                @forklist = git_get_projects_list($filter);
6533                # filter out forks of forks
6534                @forklist = filter_forks_from_projects_list(\@forklist)
6535                        if (@forklist);
6536        }
6537
6538        git_header_html();
6539        git_print_page_nav('summary','', $head);
6540
6541        print "<div class=\"title\">&nbsp;</div>\n";
6542        print "<table class=\"projects_list\">\n" .
6543              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6544        if ($owner and not $omit_owner) {
6545                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6546        }
6547        if (defined $cd{'rfc2822'}) {
6548                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6549                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6550        }
6551
6552        # use per project git URL list in $projectroot/$project/cloneurl
6553        # or make project git URL from git base URL and project name
6554        my $url_tag = "URL";
6555        my @url_list = git_get_project_url_list($project);
6556        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6557        foreach my $git_url (@url_list) {
6558                next unless $git_url;
6559                print format_repo_url($url_tag, $git_url);
6560                $url_tag = "";
6561        }
6562
6563        # Tag cloud
6564        my $show_ctags = gitweb_check_feature('ctags');
6565        if ($show_ctags) {
6566                my $ctags = git_get_project_ctags($project);
6567                if (%$ctags) {
6568                        # without ability to add tags, don't show if there are none
6569                        my $cloud = git_populate_project_tagcloud($ctags);
6570                        print "<tr id=\"metadata_ctags\">" .
6571                              "<td>content tags</td>" .
6572                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6573                              "</tr>\n";
6574                }
6575        }
6576
6577        print "</table>\n";
6578
6579        # If XSS prevention is on, we don't include README.html.
6580        # TODO: Allow a readme in some safe format.
6581        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6582                print "<div class=\"title\">readme</div>\n" .
6583                      "<div class=\"readme\">\n";
6584                insert_file("$projectroot/$project/README.html");
6585                print "\n</div>\n"; # class="readme"
6586        }
6587
6588        # we need to request one more than 16 (0..15) to check if
6589        # those 16 are all
6590        my @commitlist = $head ? parse_commits($head, 17) : ();
6591        if (@commitlist) {
6592                git_print_header_div('shortlog');
6593                git_shortlog_body(\@commitlist, 0, 15, $refs,
6594                                  $#commitlist <=  15 ? undef :
6595                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6596        }
6597
6598        if (@taglist) {
6599                git_print_header_div('tags');
6600                git_tags_body(\@taglist, 0, 15,
6601                              $#taglist <=  15 ? undef :
6602                              $cgi->a({-href => href(action=>"tags")}, "..."));
6603        }
6604
6605        if (@headlist) {
6606                git_print_header_div('heads');
6607                git_heads_body(\@headlist, $head, 0, 15,
6608                               $#headlist <= 15 ? undef :
6609                               $cgi->a({-href => href(action=>"heads")}, "..."));
6610        }
6611
6612        if (%remotedata) {
6613                git_print_header_div('remotes');
6614                git_remotes_body(\%remotedata, 15, $head);
6615        }
6616
6617        if (@forklist) {
6618                git_print_header_div('forks');
6619                git_project_list_body(\@forklist, 'age', 0, 15,
6620                                      $#forklist <= 15 ? undef :
6621                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6622                                      'no_header');
6623        }
6624
6625        git_footer_html();
6626}
6627
6628sub git_tag {
6629        my %tag = parse_tag($hash);
6630
6631        if (! %tag) {
6632                die_error(404, "Unknown tag object");
6633        }
6634
6635        my $head = git_get_head_hash($project);
6636        git_header_html();
6637        git_print_page_nav('','', $head,undef,$head);
6638        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6639        print "<div class=\"title_text\">\n" .
6640              "<table class=\"object_header\">\n" .
6641              "<tr>\n" .
6642              "<td>object</td>\n" .
6643              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6644                               $tag{'object'}) . "</td>\n" .
6645              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6646                                              $tag{'type'}) . "</td>\n" .
6647              "</tr>\n";
6648        if (defined($tag{'author'})) {
6649                git_print_authorship_rows(\%tag, 'author');
6650        }
6651        print "</table>\n\n" .
6652              "</div>\n";
6653        print "<div class=\"page_body\">";
6654        my $comment = $tag{'comment'};
6655        foreach my $line (@$comment) {
6656                chomp $line;
6657                print esc_html($line, -nbsp=>1) . "<br/>\n";
6658        }
6659        print "</div>\n";
6660        git_footer_html();
6661}
6662
6663sub git_blame_common {
6664        my $format = shift || 'porcelain';
6665        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6666                $format = 'incremental';
6667                $action = 'blame_incremental'; # for page title etc
6668        }
6669
6670        # permissions
6671        gitweb_check_feature('blame')
6672                or die_error(403, "Blame view not allowed");
6673
6674        # error checking
6675        die_error(400, "No file name given") unless $file_name;
6676        $hash_base ||= git_get_head_hash($project);
6677        die_error(404, "Couldn't find base commit") unless $hash_base;
6678        my %co = parse_commit($hash_base)
6679                or die_error(404, "Commit not found");
6680        my $ftype = "blob";
6681        if (!defined $hash) {
6682                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6683                        or die_error(404, "Error looking up file");
6684        } else {
6685                $ftype = git_get_type($hash);
6686                if ($ftype !~ "blob") {
6687                        die_error(400, "Object is not a blob");
6688                }
6689        }
6690
6691        my $fd;
6692        if ($format eq 'incremental') {
6693                # get file contents (as base)
6694                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6695                        or die_error(500, "Open git-cat-file failed");
6696        } elsif ($format eq 'data') {
6697                # run git-blame --incremental
6698                open $fd, "-|", git_cmd(), "blame", "--incremental",
6699                        $hash_base, "--", $file_name
6700                        or die_error(500, "Open git-blame --incremental failed");
6701        } else {
6702                # run git-blame --porcelain
6703                open $fd, "-|", git_cmd(), "blame", '-p',
6704                        $hash_base, '--', $file_name
6705                        or die_error(500, "Open git-blame --porcelain failed");
6706        }
6707        binmode $fd, ':utf8';
6708
6709        # incremental blame data returns early
6710        if ($format eq 'data') {
6711                print $cgi->header(
6712                        -type=>"text/plain", -charset => "utf-8",
6713                        -status=> "200 OK");
6714                local $| = 1; # output autoflush
6715                while (my $line = <$fd>) {
6716                        print to_utf8($line);
6717                }
6718                close $fd
6719                        or print "ERROR $!\n";
6720
6721                print 'END';
6722                if (defined $t0 && gitweb_check_feature('timed')) {
6723                        print ' '.
6724                              tv_interval($t0, [ gettimeofday() ]).
6725                              ' '.$number_of_git_cmds;
6726                }
6727                print "\n";
6728
6729                return;
6730        }
6731
6732        # page header
6733        git_header_html();
6734        my $formats_nav =
6735                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6736                        "blob") .
6737                " | ";
6738        if ($format eq 'incremental') {
6739                $formats_nav .=
6740                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6741                                "blame") . " (non-incremental)";
6742        } else {
6743                $formats_nav .=
6744                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6745                                "blame") . " (incremental)";
6746        }
6747        $formats_nav .=
6748                " | " .
6749                $cgi->a({-href => href(action=>"history", -replay=>1)},
6750                        "history") .
6751                " | " .
6752                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6753                        "HEAD");
6754        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6755        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6756        git_print_page_path($file_name, $ftype, $hash_base);
6757
6758        # page body
6759        if ($format eq 'incremental') {
6760                print "<noscript>\n<div class=\"error\"><center><b>\n".
6761                      "This page requires JavaScript to run.\n Use ".
6762                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6763                              'this page').
6764                      " instead.\n".
6765                      "</b></center></div>\n</noscript>\n";
6766
6767                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6768        }
6769
6770        print qq!<div class="page_body">\n!;
6771        print qq!<div id="progress_info">... / ...</div>\n!
6772                if ($format eq 'incremental');
6773        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6774              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6775              qq!<thead>\n!.
6776              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6777              qq!</thead>\n!.
6778              qq!<tbody>\n!;
6779
6780        my @rev_color = qw(light dark);
6781        my $num_colors = scalar(@rev_color);
6782        my $current_color = 0;
6783
6784        if ($format eq 'incremental') {
6785                my $color_class = $rev_color[$current_color];
6786
6787                #contents of a file
6788                my $linenr = 0;
6789        LINE:
6790                while (my $line = <$fd>) {
6791                        chomp $line;
6792                        $linenr++;
6793
6794                        print qq!<tr id="l$linenr" class="$color_class">!.
6795                              qq!<td class="sha1"><a href=""> </a></td>!.
6796                              qq!<td class="linenr">!.
6797                              qq!<a class="linenr" href="">$linenr</a></td>!;
6798                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6799                        print qq!</tr>\n!;
6800                }
6801
6802        } else { # porcelain, i.e. ordinary blame
6803                my %metainfo = (); # saves information about commits
6804
6805                # blame data
6806        LINE:
6807                while (my $line = <$fd>) {
6808                        chomp $line;
6809                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6810                        # no <lines in group> for subsequent lines in group of lines
6811                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6812                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6813                        if (!exists $metainfo{$full_rev}) {
6814                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6815                        }
6816                        my $meta = $metainfo{$full_rev};
6817                        my $data;
6818                        while ($data = <$fd>) {
6819                                chomp $data;
6820                                last if ($data =~ s/^\t//); # contents of line
6821                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6822                                        $meta->{$1} = $2 unless exists $meta->{$1};
6823                                }
6824                                if ($data =~ /^previous /) {
6825                                        $meta->{'nprevious'}++;
6826                                }
6827                        }
6828                        my $short_rev = substr($full_rev, 0, 8);
6829                        my $author = $meta->{'author'};
6830                        my %date =
6831                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6832                        my $date = $date{'iso-tz'};
6833                        if ($group_size) {
6834                                $current_color = ($current_color + 1) % $num_colors;
6835                        }
6836                        my $tr_class = $rev_color[$current_color];
6837                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6838                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6839                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6840                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6841                        if ($group_size) {
6842                                print "<td class=\"sha1\"";
6843                                print " title=\"". esc_html($author) . ", $date\"";
6844                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6845                                print ">";
6846                                print $cgi->a({-href => href(action=>"commit",
6847                                                             hash=>$full_rev,
6848                                                             file_name=>$file_name)},
6849                                              esc_html($short_rev));
6850                                if ($group_size >= 2) {
6851                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6852                                        if (@author_initials) {
6853                                                print "<br />" .
6854                                                      esc_html(join('', @author_initials));
6855                                                #           or join('.', ...)
6856                                        }
6857                                }
6858                                print "</td>\n";
6859                        }
6860                        # 'previous' <sha1 of parent commit> <filename at commit>
6861                        if (exists $meta->{'previous'} &&
6862                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6863                                $meta->{'parent'} = $1;
6864                                $meta->{'file_parent'} = unquote($2);
6865                        }
6866                        my $linenr_commit =
6867                                exists($meta->{'parent'}) ?
6868                                $meta->{'parent'} : $full_rev;
6869                        my $linenr_filename =
6870                                exists($meta->{'file_parent'}) ?
6871                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6872                        my $blamed = href(action => 'blame',
6873                                          file_name => $linenr_filename,
6874                                          hash_base => $linenr_commit);
6875                        print "<td class=\"linenr\">";
6876                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6877                                        -class => "linenr" },
6878                                      esc_html($lineno));
6879                        print "</td>";
6880                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6881                        print "</tr>\n";
6882                } # end while
6883
6884        }
6885
6886        # footer
6887        print "</tbody>\n".
6888              "</table>\n"; # class="blame"
6889        print "</div>\n";   # class="blame_body"
6890        close $fd
6891                or print "Reading blob failed\n";
6892
6893        git_footer_html();
6894}
6895
6896sub git_blame {
6897        git_blame_common();
6898}
6899
6900sub git_blame_incremental {
6901        git_blame_common('incremental');
6902}
6903
6904sub git_blame_data {
6905        git_blame_common('data');
6906}
6907
6908sub git_tags {
6909        my $head = git_get_head_hash($project);
6910        git_header_html();
6911        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6912        git_print_header_div('summary', $project);
6913
6914        my @tagslist = git_get_tags_list();
6915        if (@tagslist) {
6916                git_tags_body(\@tagslist);
6917        }
6918        git_footer_html();
6919}
6920
6921sub git_heads {
6922        my $head = git_get_head_hash($project);
6923        git_header_html();
6924        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6925        git_print_header_div('summary', $project);
6926
6927        my @headslist = git_get_heads_list();
6928        if (@headslist) {
6929                git_heads_body(\@headslist, $head);
6930        }
6931        git_footer_html();
6932}
6933
6934# used both for single remote view and for list of all the remotes
6935sub git_remotes {
6936        gitweb_check_feature('remote_heads')
6937                or die_error(403, "Remote heads view is disabled");
6938
6939        my $head = git_get_head_hash($project);
6940        my $remote = $input_params{'hash'};
6941
6942        my $remotedata = git_get_remotes_list($remote);
6943        die_error(500, "Unable to get remote information") unless defined $remotedata;
6944
6945        unless (%$remotedata) {
6946                die_error(404, defined $remote ?
6947                        "Remote $remote not found" :
6948                        "No remotes found");
6949        }
6950
6951        git_header_html(undef, undef, -action_extra => $remote);
6952        git_print_page_nav('', '',  $head, undef, $head,
6953                format_ref_views($remote ? '' : 'remotes'));
6954
6955        fill_remote_heads($remotedata);
6956        if (defined $remote) {
6957                git_print_header_div('remotes', "$remote remote for $project");
6958                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6959        } else {
6960                git_print_header_div('summary', "$project remotes");
6961                git_remotes_body($remotedata, undef, $head);
6962        }
6963
6964        git_footer_html();
6965}
6966
6967sub git_blob_plain {
6968        my $type = shift;
6969        my $expires;
6970
6971        if (!defined $hash) {
6972                if (defined $file_name) {
6973                        my $base = $hash_base || git_get_head_hash($project);
6974                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6975                                or die_error(404, "Cannot find file");
6976                } else {
6977                        die_error(400, "No file name defined");
6978                }
6979        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6980                # blobs defined by non-textual hash id's can be cached
6981                $expires = "+1d";
6982        }
6983
6984        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6985                or die_error(500, "Open git-cat-file blob '$hash' failed");
6986
6987        # content-type (can include charset)
6988        $type = blob_contenttype($fd, $file_name, $type);
6989
6990        # "save as" filename, even when no $file_name is given
6991        my $save_as = "$hash";
6992        if (defined $file_name) {
6993                $save_as = $file_name;
6994        } elsif ($type =~ m/^text\//) {
6995                $save_as .= '.txt';
6996        }
6997
6998        # With XSS prevention on, blobs of all types except a few known safe
6999        # ones are served with "Content-Disposition: attachment" to make sure
7000        # they don't run in our security domain.  For certain image types,
7001        # blob view writes an <img> tag referring to blob_plain view, and we
7002        # want to be sure not to break that by serving the image as an
7003        # attachment (though Firefox 3 doesn't seem to care).
7004        my $sandbox = $prevent_xss &&
7005                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7006
7007        # serve text/* as text/plain
7008        if ($prevent_xss &&
7009            ($type =~ m!^text/[a-z]+\b(.*)$! ||
7010             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7011                my $rest = $1;
7012                $rest = defined $rest ? $rest : '';
7013                $type = "text/plain$rest";
7014        }
7015
7016        print $cgi->header(
7017                -type => $type,
7018                -expires => $expires,
7019                -content_disposition =>
7020                        ($sandbox ? 'attachment' : 'inline')
7021                        . '; filename="' . $save_as . '"');
7022        local $/ = undef;
7023        binmode STDOUT, ':raw';
7024        print <$fd>;
7025        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7026        close $fd;
7027}
7028
7029sub git_blob {
7030        my $expires;
7031
7032        if (!defined $hash) {
7033                if (defined $file_name) {
7034                        my $base = $hash_base || git_get_head_hash($project);
7035                        $hash = git_get_hash_by_path($base, $file_name, "blob")
7036                                or die_error(404, "Cannot find file");
7037                } else {
7038                        die_error(400, "No file name defined");
7039                }
7040        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7041                # blobs defined by non-textual hash id's can be cached
7042                $expires = "+1d";
7043        }
7044
7045        my $have_blame = gitweb_check_feature('blame');
7046        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7047                or die_error(500, "Couldn't cat $file_name, $hash");
7048        my $mimetype = blob_mimetype($fd, $file_name);
7049        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7050        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7051                close $fd;
7052                return git_blob_plain($mimetype);
7053        }
7054        # we can have blame only for text/* mimetype
7055        $have_blame &&= ($mimetype =~ m!^text/!);
7056
7057        my $highlight = gitweb_check_feature('highlight');
7058        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7059        $fd = run_highlighter($fd, $highlight, $syntax)
7060                if $syntax;
7061
7062        git_header_html(undef, $expires);
7063        my $formats_nav = '';
7064        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7065                if (defined $file_name) {
7066                        if ($have_blame) {
7067                                $formats_nav .=
7068                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
7069                                                "blame") .
7070                                        " | ";
7071                        }
7072                        $formats_nav .=
7073                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7074                                        "history") .
7075                                " | " .
7076                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7077                                        "raw") .
7078                                " | " .
7079                                $cgi->a({-href => href(action=>"blob",
7080                                                       hash_base=>"HEAD", file_name=>$file_name)},
7081                                        "HEAD");
7082                } else {
7083                        $formats_nav .=
7084                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7085                                        "raw");
7086                }
7087                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7088                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7089        } else {
7090                print "<div class=\"page_nav\">\n" .
7091                      "<br/><br/></div>\n" .
7092                      "<div class=\"title\">".esc_html($hash)."</div>\n";
7093        }
7094        git_print_page_path($file_name, "blob", $hash_base);
7095        print "<div class=\"page_body\">\n";
7096        if ($mimetype =~ m!^image/!) {
7097                print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7098                if ($file_name) {
7099                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7100                }
7101                print qq! src="! .
7102                      href(action=>"blob_plain", hash=>$hash,
7103                           hash_base=>$hash_base, file_name=>$file_name) .
7104                      qq!" />\n!;
7105        } else {
7106                my $nr;
7107                while (my $line = <$fd>) {
7108                        chomp $line;
7109                        $nr++;
7110                        $line = untabify($line);
7111                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7112                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7113                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7114                }
7115        }
7116        close $fd
7117                or print "Reading blob failed.\n";
7118        print "</div>";
7119        git_footer_html();
7120}
7121
7122sub git_tree {
7123        if (!defined $hash_base) {
7124                $hash_base = "HEAD";
7125        }
7126        if (!defined $hash) {
7127                if (defined $file_name) {
7128                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7129                } else {
7130                        $hash = $hash_base;
7131                }
7132        }
7133        die_error(404, "No such tree") unless defined($hash);
7134
7135        my $show_sizes = gitweb_check_feature('show-sizes');
7136        my $have_blame = gitweb_check_feature('blame');
7137
7138        my @entries = ();
7139        {
7140                local $/ = "\0";
7141                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7142                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7143                        or die_error(500, "Open git-ls-tree failed");
7144                @entries = map { chomp; $_ } <$fd>;
7145                close $fd
7146                        or die_error(404, "Reading tree failed");
7147        }
7148
7149        my $refs = git_get_references();
7150        my $ref = format_ref_marker($refs, $hash_base);
7151        git_header_html();
7152        my $basedir = '';
7153        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7154                my @views_nav = ();
7155                if (defined $file_name) {
7156                        push @views_nav,
7157                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7158                                        "history"),
7159                                $cgi->a({-href => href(action=>"tree",
7160                                                       hash_base=>"HEAD", file_name=>$file_name)},
7161                                        "HEAD"),
7162                }
7163                my $snapshot_links = format_snapshot_links($hash);
7164                if (defined $snapshot_links) {
7165                        # FIXME: Should be available when we have no hash base as well.
7166                        push @views_nav, $snapshot_links;
7167                }
7168                git_print_page_nav('tree','', $hash_base, undef, undef,
7169                                   join(' | ', @views_nav));
7170                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7171        } else {
7172                undef $hash_base;
7173                print "<div class=\"page_nav\">\n";
7174                print "<br/><br/></div>\n";
7175                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7176        }
7177        if (defined $file_name) {
7178                $basedir = $file_name;
7179                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7180                        $basedir .= '/';
7181                }
7182                git_print_page_path($file_name, 'tree', $hash_base);
7183        }
7184        print "<div class=\"page_body\">\n";
7185        print "<table class=\"tree\">\n";
7186        my $alternate = 1;
7187        # '..' (top directory) link if possible
7188        if (defined $hash_base &&
7189            defined $file_name && $file_name =~ m![^/]+$!) {
7190                if ($alternate) {
7191                        print "<tr class=\"dark\">\n";
7192                } else {
7193                        print "<tr class=\"light\">\n";
7194                }
7195                $alternate ^= 1;
7196
7197                my $up = $file_name;
7198                $up =~ s!/?[^/]+$!!;
7199                undef $up unless $up;
7200                # based on git_print_tree_entry
7201                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7202                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7203                print '<td class="list">';
7204                print $cgi->a({-href => href(action=>"tree",
7205                                             hash_base=>$hash_base,
7206                                             file_name=>$up)},
7207                              "..");
7208                print "</td>\n";
7209                print "<td class=\"link\"></td>\n";
7210
7211                print "</tr>\n";
7212        }
7213        foreach my $line (@entries) {
7214                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7215
7216                if ($alternate) {
7217                        print "<tr class=\"dark\">\n";
7218                } else {
7219                        print "<tr class=\"light\">\n";
7220                }
7221                $alternate ^= 1;
7222
7223                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7224
7225                print "</tr>\n";
7226        }
7227        print "</table>\n" .
7228              "</div>";
7229        git_footer_html();
7230}
7231
7232sub sanitize_for_filename {
7233    my $name = shift;
7234
7235    $name =~ s!/!-!g;
7236    $name =~ s/[^[:alnum:]_.-]//g;
7237
7238    return $name;
7239}
7240
7241sub snapshot_name {
7242        my ($project, $hash) = @_;
7243
7244        # path/to/project.git  -> project
7245        # path/to/project/.git -> project
7246        my $name = to_utf8($project);
7247        $name =~ s,([^/])/*\.git$,$1,;
7248        $name = sanitize_for_filename(basename($name));
7249
7250        my $ver = $hash;
7251        if ($hash =~ /^[0-9a-fA-F]+$/) {
7252                # shorten SHA-1 hash
7253                my $full_hash = git_get_full_hash($project, $hash);
7254                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7255                        $ver = git_get_short_hash($project, $hash);
7256                }
7257        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7258                # tags don't need shortened SHA-1 hash
7259                $ver = $1;
7260        } else {
7261                # branches and other need shortened SHA-1 hash
7262                my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7263                if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7264                        my $ref_dir = (defined $1) ? $1 : '';
7265                        $ver = $2;
7266
7267                        $ref_dir = sanitize_for_filename($ref_dir);
7268                        # for refs neither in heads nor remotes we want to
7269                        # add a ref dir to archive name
7270                        if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7271                                $ver = $ref_dir . '-' . $ver;
7272                        }
7273                }
7274                $ver .= '-' . git_get_short_hash($project, $hash);
7275        }
7276        # special case of sanitization for filename - we change
7277        # slashes to dots instead of dashes
7278        # in case of hierarchical branch names
7279        $ver =~ s!/!.!g;
7280        $ver =~ s/[^[:alnum:]_.-]//g;
7281
7282        # name = project-version_string
7283        $name = "$name-$ver";
7284
7285        return wantarray ? ($name, $name) : $name;
7286}
7287
7288sub exit_if_unmodified_since {
7289        my ($latest_epoch) = @_;
7290        our $cgi;
7291
7292        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7293        if (defined $if_modified) {
7294                my $since;
7295                if (eval { require HTTP::Date; 1; }) {
7296                        $since = HTTP::Date::str2time($if_modified);
7297                } elsif (eval { require Time::ParseDate; 1; }) {
7298                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7299                }
7300                if (defined $since && $latest_epoch <= $since) {
7301                        my %latest_date = parse_date($latest_epoch);
7302                        print $cgi->header(
7303                                -last_modified => $latest_date{'rfc2822'},
7304                                -status => '304 Not Modified');
7305                        goto DONE_GITWEB;
7306                }
7307        }
7308}
7309
7310sub git_snapshot {
7311        my $format = $input_params{'snapshot_format'};
7312        if (!@snapshot_fmts) {
7313                die_error(403, "Snapshots not allowed");
7314        }
7315        # default to first supported snapshot format
7316        $format ||= $snapshot_fmts[0];
7317        if ($format !~ m/^[a-z0-9]+$/) {
7318                die_error(400, "Invalid snapshot format parameter");
7319        } elsif (!exists($known_snapshot_formats{$format})) {
7320                die_error(400, "Unknown snapshot format");
7321        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7322                die_error(403, "Snapshot format not allowed");
7323        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7324                die_error(403, "Unsupported snapshot format");
7325        }
7326
7327        my $type = git_get_type("$hash^{}");
7328        if (!$type) {
7329                die_error(404, 'Object does not exist');
7330        }  elsif ($type eq 'blob') {
7331                die_error(400, 'Object is not a tree-ish');
7332        }
7333
7334        my ($name, $prefix) = snapshot_name($project, $hash);
7335        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7336
7337        my %co = parse_commit($hash);
7338        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7339
7340        my $cmd = quote_command(
7341                git_cmd(), 'archive',
7342                "--format=$known_snapshot_formats{$format}{'format'}",
7343                "--prefix=$prefix/", $hash);
7344        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7345                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7346        }
7347
7348        $filename =~ s/(["\\])/\\$1/g;
7349        my %latest_date;
7350        if (%co) {
7351                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7352        }
7353
7354        print $cgi->header(
7355                -type => $known_snapshot_formats{$format}{'type'},
7356                -content_disposition => 'inline; filename="' . $filename . '"',
7357                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7358                -status => '200 OK');
7359
7360        open my $fd, "-|", $cmd
7361                or die_error(500, "Execute git-archive failed");
7362        binmode STDOUT, ':raw';
7363        print <$fd>;
7364        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7365        close $fd;
7366}
7367
7368sub git_log_generic {
7369        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7370
7371        my $head = git_get_head_hash($project);
7372        if (!defined $base) {
7373                $base = $head;
7374        }
7375        if (!defined $page) {
7376                $page = 0;
7377        }
7378        my $refs = git_get_references();
7379
7380        my $commit_hash = $base;
7381        if (defined $parent) {
7382                $commit_hash = "$parent..$base";
7383        }
7384        my @commitlist =
7385                parse_commits($commit_hash, 101, (100 * $page),
7386                              defined $file_name ? ($file_name, "--full-history") : ());
7387
7388        my $ftype;
7389        if (!defined $file_hash && defined $file_name) {
7390                # some commits could have deleted file in question,
7391                # and not have it in tree, but one of them has to have it
7392                for (my $i = 0; $i < @commitlist; $i++) {
7393                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7394                        last if defined $file_hash;
7395                }
7396        }
7397        if (defined $file_hash) {
7398                $ftype = git_get_type($file_hash);
7399        }
7400        if (defined $file_name && !defined $ftype) {
7401                die_error(500, "Unknown type of object");
7402        }
7403        my %co;
7404        if (defined $file_name) {
7405                %co = parse_commit($base)
7406                        or die_error(404, "Unknown commit object");
7407        }
7408
7409
7410        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7411        my $next_link = '';
7412        if ($#commitlist >= 100) {
7413                $next_link =
7414                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7415                                 -accesskey => "n", -title => "Alt-n"}, "next");
7416        }
7417        my $patch_max = gitweb_get_feature('patches');
7418        if ($patch_max && !defined $file_name) {
7419                if ($patch_max < 0 || @commitlist <= $patch_max) {
7420                        $paging_nav .= " &sdot; " .
7421                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7422                                        "patches");
7423                }
7424        }
7425
7426        git_header_html();
7427        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7428        if (defined $file_name) {
7429                git_print_header_div('commit', esc_html($co{'title'}), $base);
7430        } else {
7431                git_print_header_div('summary', $project)
7432        }
7433        git_print_page_path($file_name, $ftype, $hash_base)
7434                if (defined $file_name);
7435
7436        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7437                     $file_name, $file_hash, $ftype);
7438
7439        git_footer_html();
7440}
7441
7442sub git_log {
7443        git_log_generic('log', \&git_log_body,
7444                        $hash, $hash_parent);
7445}
7446
7447sub git_commit {
7448        $hash ||= $hash_base || "HEAD";
7449        my %co = parse_commit($hash)
7450            or die_error(404, "Unknown commit object");
7451
7452        my $parent  = $co{'parent'};
7453        my $parents = $co{'parents'}; # listref
7454
7455        # we need to prepare $formats_nav before any parameter munging
7456        my $formats_nav;
7457        if (!defined $parent) {
7458                # --root commitdiff
7459                $formats_nav .= '(initial)';
7460        } elsif (@$parents == 1) {
7461                # single parent commit
7462                $formats_nav .=
7463                        '(parent: ' .
7464                        $cgi->a({-href => href(action=>"commit",
7465                                               hash=>$parent)},
7466                                esc_html(substr($parent, 0, 7))) .
7467                        ')';
7468        } else {
7469                # merge commit
7470                $formats_nav .=
7471                        '(merge: ' .
7472                        join(' ', map {
7473                                $cgi->a({-href => href(action=>"commit",
7474                                                       hash=>$_)},
7475                                        esc_html(substr($_, 0, 7)));
7476                        } @$parents ) .
7477                        ')';
7478        }
7479        if (gitweb_check_feature('patches') && @$parents <= 1) {
7480                $formats_nav .= " | " .
7481                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7482                                "patch");
7483        }
7484
7485        if (!defined $parent) {
7486                $parent = "--root";
7487        }
7488        my @difftree;
7489        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7490                @diff_opts,
7491                (@$parents <= 1 ? $parent : '-c'),
7492                $hash, "--"
7493                or die_error(500, "Open git-diff-tree failed");
7494        @difftree = map { chomp; $_ } <$fd>;
7495        close $fd or die_error(404, "Reading git-diff-tree failed");
7496
7497        # non-textual hash id's can be cached
7498        my $expires;
7499        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7500                $expires = "+1d";
7501        }
7502        my $refs = git_get_references();
7503        my $ref = format_ref_marker($refs, $co{'id'});
7504
7505        git_header_html(undef, $expires);
7506        git_print_page_nav('commit', '',
7507                           $hash, $co{'tree'}, $hash,
7508                           $formats_nav);
7509
7510        if (defined $co{'parent'}) {
7511                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7512        } else {
7513                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7514        }
7515        print "<div class=\"title_text\">\n" .
7516              "<table class=\"object_header\">\n";
7517        git_print_authorship_rows(\%co);
7518        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7519        print "<tr>" .
7520              "<td>tree</td>" .
7521              "<td class=\"sha1\">" .
7522              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7523                       class => "list"}, $co{'tree'}) .
7524              "</td>" .
7525              "<td class=\"link\">" .
7526              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7527                      "tree");
7528        my $snapshot_links = format_snapshot_links($hash);
7529        if (defined $snapshot_links) {
7530                print " | " . $snapshot_links;
7531        }
7532        print "</td>" .
7533              "</tr>\n";
7534
7535        foreach my $par (@$parents) {
7536                print "<tr>" .
7537                      "<td>parent</td>" .
7538                      "<td class=\"sha1\">" .
7539                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7540                               class => "list"}, $par) .
7541                      "</td>" .
7542                      "<td class=\"link\">" .
7543                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7544                      " | " .
7545                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7546                      "</td>" .
7547                      "</tr>\n";
7548        }
7549        print "</table>".
7550              "</div>\n";
7551
7552        print "<div class=\"page_body\">\n";
7553        git_print_log($co{'comment'});
7554        print "</div>\n";
7555
7556        git_difftree_body(\@difftree, $hash, @$parents);
7557
7558        git_footer_html();
7559}
7560
7561sub git_object {
7562        # object is defined by:
7563        # - hash or hash_base alone
7564        # - hash_base and file_name
7565        my $type;
7566
7567        # - hash or hash_base alone
7568        if ($hash || ($hash_base && !defined $file_name)) {
7569                my $object_id = $hash || $hash_base;
7570
7571                open my $fd, "-|", quote_command(
7572                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7573                        or die_error(404, "Object does not exist");
7574                $type = <$fd>;
7575                chomp $type;
7576                close $fd
7577                        or die_error(404, "Object does not exist");
7578
7579        # - hash_base and file_name
7580        } elsif ($hash_base && defined $file_name) {
7581                $file_name =~ s,/+$,,;
7582
7583                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7584                        or die_error(404, "Base object does not exist");
7585
7586                # here errors should not happen
7587                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7588                        or die_error(500, "Open git-ls-tree failed");
7589                my $line = <$fd>;
7590                close $fd;
7591
7592                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7593                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7594                        die_error(404, "File or directory for given base does not exist");
7595                }
7596                $type = $2;
7597                $hash = $3;
7598        } else {
7599                die_error(400, "Not enough information to find object");
7600        }
7601
7602        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7603                                          hash=>$hash, hash_base=>$hash_base,
7604                                          file_name=>$file_name),
7605                             -status => '302 Found');
7606}
7607
7608sub git_blobdiff {
7609        my $format = shift || 'html';
7610        my $diff_style = $input_params{'diff_style'} || 'inline';
7611
7612        my $fd;
7613        my @difftree;
7614        my %diffinfo;
7615        my $expires;
7616
7617        # preparing $fd and %diffinfo for git_patchset_body
7618        # new style URI
7619        if (defined $hash_base && defined $hash_parent_base) {
7620                if (defined $file_name) {
7621                        # read raw output
7622                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7623                                $hash_parent_base, $hash_base,
7624                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7625                                or die_error(500, "Open git-diff-tree failed");
7626                        @difftree = map { chomp; $_ } <$fd>;
7627                        close $fd
7628                                or die_error(404, "Reading git-diff-tree failed");
7629                        @difftree
7630                                or die_error(404, "Blob diff not found");
7631
7632                } elsif (defined $hash &&
7633                         $hash =~ /[0-9a-fA-F]{40}/) {
7634                        # try to find filename from $hash
7635
7636                        # read filtered raw output
7637                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7638                                $hash_parent_base, $hash_base, "--"
7639                                or die_error(500, "Open git-diff-tree failed");
7640                        @difftree =
7641                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7642                                # $hash == to_id
7643                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7644                                map { chomp; $_ } <$fd>;
7645                        close $fd
7646                                or die_error(404, "Reading git-diff-tree failed");
7647                        @difftree
7648                                or die_error(404, "Blob diff not found");
7649
7650                } else {
7651                        die_error(400, "Missing one of the blob diff parameters");
7652                }
7653
7654                if (@difftree > 1) {
7655                        die_error(400, "Ambiguous blob diff specification");
7656                }
7657
7658                %diffinfo = parse_difftree_raw_line($difftree[0]);
7659                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7660                $file_name   ||= $diffinfo{'to_file'};
7661
7662                $hash_parent ||= $diffinfo{'from_id'};
7663                $hash        ||= $diffinfo{'to_id'};
7664
7665                # non-textual hash id's can be cached
7666                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7667                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7668                        $expires = '+1d';
7669                }
7670
7671                # open patch output
7672                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7673                        '-p', ($format eq 'html' ? "--full-index" : ()),
7674                        $hash_parent_base, $hash_base,
7675                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7676                        or die_error(500, "Open git-diff-tree failed");
7677        }
7678
7679        # old/legacy style URI -- not generated anymore since 1.4.3.
7680        if (!%diffinfo) {
7681                die_error('404 Not Found', "Missing one of the blob diff parameters")
7682        }
7683
7684        # header
7685        if ($format eq 'html') {
7686                my $formats_nav =
7687                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7688                                "raw");
7689                $formats_nav .= diff_style_nav($diff_style);
7690                git_header_html(undef, $expires);
7691                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7692                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7693                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7694                } else {
7695                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7696                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7697                }
7698                if (defined $file_name) {
7699                        git_print_page_path($file_name, "blob", $hash_base);
7700                } else {
7701                        print "<div class=\"page_path\"></div>\n";
7702                }
7703
7704        } elsif ($format eq 'plain') {
7705                print $cgi->header(
7706                        -type => 'text/plain',
7707                        -charset => 'utf-8',
7708                        -expires => $expires,
7709                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7710
7711                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7712
7713        } else {
7714                die_error(400, "Unknown blobdiff format");
7715        }
7716
7717        # patch
7718        if ($format eq 'html') {
7719                print "<div class=\"page_body\">\n";
7720
7721                git_patchset_body($fd, $diff_style,
7722                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7723                close $fd;
7724
7725                print "</div>\n"; # class="page_body"
7726                git_footer_html();
7727
7728        } else {
7729                while (my $line = <$fd>) {
7730                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7731                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7732
7733                        print $line;
7734
7735                        last if $line =~ m!^\+\+\+!;
7736                }
7737                local $/ = undef;
7738                print <$fd>;
7739                close $fd;
7740        }
7741}
7742
7743sub git_blobdiff_plain {
7744        git_blobdiff('plain');
7745}
7746
7747# assumes that it is added as later part of already existing navigation,
7748# so it returns "| foo | bar" rather than just "foo | bar"
7749sub diff_style_nav {
7750        my ($diff_style, $is_combined) = @_;
7751        $diff_style ||= 'inline';
7752
7753        return "" if ($is_combined);
7754
7755        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7756        my %styles = @styles;
7757        @styles =
7758                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7759
7760        return join '',
7761                map { " | ".$_ }
7762                map {
7763                        $_ eq $diff_style ? $styles{$_} :
7764                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7765                } @styles;
7766}
7767
7768sub git_commitdiff {
7769        my %params = @_;
7770        my $format = $params{-format} || 'html';
7771        my $diff_style = $input_params{'diff_style'} || 'inline';
7772
7773        my ($patch_max) = gitweb_get_feature('patches');
7774        if ($format eq 'patch') {
7775                die_error(403, "Patch view not allowed") unless $patch_max;
7776        }
7777
7778        $hash ||= $hash_base || "HEAD";
7779        my %co = parse_commit($hash)
7780            or die_error(404, "Unknown commit object");
7781
7782        # choose format for commitdiff for merge
7783        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7784                $hash_parent = '--cc';
7785        }
7786        # we need to prepare $formats_nav before almost any parameter munging
7787        my $formats_nav;
7788        if ($format eq 'html') {
7789                $formats_nav =
7790                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7791                                "raw");
7792                if ($patch_max && @{$co{'parents'}} <= 1) {
7793                        $formats_nav .= " | " .
7794                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7795                                        "patch");
7796                }
7797                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7798
7799                if (defined $hash_parent &&
7800                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7801                        # commitdiff with two commits given
7802                        my $hash_parent_short = $hash_parent;
7803                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7804                                $hash_parent_short = substr($hash_parent, 0, 7);
7805                        }
7806                        $formats_nav .=
7807                                ' (from';
7808                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7809                                if ($co{'parents'}[$i] eq $hash_parent) {
7810                                        $formats_nav .= ' parent ' . ($i+1);
7811                                        last;
7812                                }
7813                        }
7814                        $formats_nav .= ': ' .
7815                                $cgi->a({-href => href(-replay=>1,
7816                                                       hash=>$hash_parent, hash_base=>undef)},
7817                                        esc_html($hash_parent_short)) .
7818                                ')';
7819                } elsif (!$co{'parent'}) {
7820                        # --root commitdiff
7821                        $formats_nav .= ' (initial)';
7822                } elsif (scalar @{$co{'parents'}} == 1) {
7823                        # single parent commit
7824                        $formats_nav .=
7825                                ' (parent: ' .
7826                                $cgi->a({-href => href(-replay=>1,
7827                                                       hash=>$co{'parent'}, hash_base=>undef)},
7828                                        esc_html(substr($co{'parent'}, 0, 7))) .
7829                                ')';
7830                } else {
7831                        # merge commit
7832                        if ($hash_parent eq '--cc') {
7833                                $formats_nav .= ' | ' .
7834                                        $cgi->a({-href => href(-replay=>1,
7835                                                               hash=>$hash, hash_parent=>'-c')},
7836                                                'combined');
7837                        } else { # $hash_parent eq '-c'
7838                                $formats_nav .= ' | ' .
7839                                        $cgi->a({-href => href(-replay=>1,
7840                                                               hash=>$hash, hash_parent=>'--cc')},
7841                                                'compact');
7842                        }
7843                        $formats_nav .=
7844                                ' (merge: ' .
7845                                join(' ', map {
7846                                        $cgi->a({-href => href(-replay=>1,
7847                                                               hash=>$_, hash_base=>undef)},
7848                                                esc_html(substr($_, 0, 7)));
7849                                } @{$co{'parents'}} ) .
7850                                ')';
7851                }
7852        }
7853
7854        my $hash_parent_param = $hash_parent;
7855        if (!defined $hash_parent_param) {
7856                # --cc for multiple parents, --root for parentless
7857                $hash_parent_param =
7858                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7859        }
7860
7861        # read commitdiff
7862        my $fd;
7863        my @difftree;
7864        if ($format eq 'html') {
7865                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7866                        "--no-commit-id", "--patch-with-raw", "--full-index",
7867                        $hash_parent_param, $hash, "--"
7868                        or die_error(500, "Open git-diff-tree failed");
7869
7870                while (my $line = <$fd>) {
7871                        chomp $line;
7872                        # empty line ends raw part of diff-tree output
7873                        last unless $line;
7874                        push @difftree, scalar parse_difftree_raw_line($line);
7875                }
7876
7877        } elsif ($format eq 'plain') {
7878                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7879                        '-p', $hash_parent_param, $hash, "--"
7880                        or die_error(500, "Open git-diff-tree failed");
7881        } elsif ($format eq 'patch') {
7882                # For commit ranges, we limit the output to the number of
7883                # patches specified in the 'patches' feature.
7884                # For single commits, we limit the output to a single patch,
7885                # diverging from the git-format-patch default.
7886                my @commit_spec = ();
7887                if ($hash_parent) {
7888                        if ($patch_max > 0) {
7889                                push @commit_spec, "-$patch_max";
7890                        }
7891                        push @commit_spec, '-n', "$hash_parent..$hash";
7892                } else {
7893                        if ($params{-single}) {
7894                                push @commit_spec, '-1';
7895                        } else {
7896                                if ($patch_max > 0) {
7897                                        push @commit_spec, "-$patch_max";
7898                                }
7899                                push @commit_spec, "-n";
7900                        }
7901                        push @commit_spec, '--root', $hash;
7902                }
7903                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7904                        '--encoding=utf8', '--stdout', @commit_spec
7905                        or die_error(500, "Open git-format-patch failed");
7906        } else {
7907                die_error(400, "Unknown commitdiff format");
7908        }
7909
7910        # non-textual hash id's can be cached
7911        my $expires;
7912        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7913                $expires = "+1d";
7914        }
7915
7916        # write commit message
7917        if ($format eq 'html') {
7918                my $refs = git_get_references();
7919                my $ref = format_ref_marker($refs, $co{'id'});
7920
7921                git_header_html(undef, $expires);
7922                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7923                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7924                print "<div class=\"title_text\">\n" .
7925                      "<table class=\"object_header\">\n";
7926                git_print_authorship_rows(\%co);
7927                print "</table>".
7928                      "</div>\n";
7929                print "<div class=\"page_body\">\n";
7930                if (@{$co{'comment'}} > 1) {
7931                        print "<div class=\"log\">\n";
7932                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7933                        print "</div>\n"; # class="log"
7934                }
7935
7936        } elsif ($format eq 'plain') {
7937                my $refs = git_get_references("tags");
7938                my $tagname = git_get_rev_name_tags($hash);
7939                my $filename = basename($project) . "-$hash.patch";
7940
7941                print $cgi->header(
7942                        -type => 'text/plain',
7943                        -charset => 'utf-8',
7944                        -expires => $expires,
7945                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7946                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7947                print "From: " . to_utf8($co{'author'}) . "\n";
7948                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7949                print "Subject: " . to_utf8($co{'title'}) . "\n";
7950
7951                print "X-Git-Tag: $tagname\n" if $tagname;
7952                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7953
7954                foreach my $line (@{$co{'comment'}}) {
7955                        print to_utf8($line) . "\n";
7956                }
7957                print "---\n\n";
7958        } elsif ($format eq 'patch') {
7959                my $filename = basename($project) . "-$hash.patch";
7960
7961                print $cgi->header(
7962                        -type => 'text/plain',
7963                        -charset => 'utf-8',
7964                        -expires => $expires,
7965                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7966        }
7967
7968        # write patch
7969        if ($format eq 'html') {
7970                my $use_parents = !defined $hash_parent ||
7971                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7972                git_difftree_body(\@difftree, $hash,
7973                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7974                print "<br/>\n";
7975
7976                git_patchset_body($fd, $diff_style,
7977                                  \@difftree, $hash,
7978                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7979                close $fd;
7980                print "</div>\n"; # class="page_body"
7981                git_footer_html();
7982
7983        } elsif ($format eq 'plain') {
7984                local $/ = undef;
7985                print <$fd>;
7986                close $fd
7987                        or print "Reading git-diff-tree failed\n";
7988        } elsif ($format eq 'patch') {
7989                local $/ = undef;
7990                print <$fd>;
7991                close $fd
7992                        or print "Reading git-format-patch failed\n";
7993        }
7994}
7995
7996sub git_commitdiff_plain {
7997        git_commitdiff(-format => 'plain');
7998}
7999
8000# format-patch-style patches
8001sub git_patch {
8002        git_commitdiff(-format => 'patch', -single => 1);
8003}
8004
8005sub git_patches {
8006        git_commitdiff(-format => 'patch');
8007}
8008
8009sub git_history {
8010        git_log_generic('history', \&git_history_body,
8011                        $hash_base, $hash_parent_base,
8012                        $file_name, $hash);
8013}
8014
8015sub git_search {
8016        $searchtype ||= 'commit';
8017
8018        # check if appropriate features are enabled
8019        gitweb_check_feature('search')
8020                or die_error(403, "Search is disabled");
8021        if ($searchtype eq 'pickaxe') {
8022                # pickaxe may take all resources of your box and run for several minutes
8023                # with every query - so decide by yourself how public you make this feature
8024                gitweb_check_feature('pickaxe')
8025                        or die_error(403, "Pickaxe search is disabled");
8026        }
8027        if ($searchtype eq 'grep') {
8028                # grep search might be potentially CPU-intensive, too
8029                gitweb_check_feature('grep')
8030                        or die_error(403, "Grep search is disabled");
8031        }
8032
8033        if (!defined $searchtext) {
8034                die_error(400, "Text field is empty");
8035        }
8036        if (!defined $hash) {
8037                $hash = git_get_head_hash($project);
8038        }
8039        my %co = parse_commit($hash);
8040        if (!%co) {
8041                die_error(404, "Unknown commit object");
8042        }
8043        if (!defined $page) {
8044                $page = 0;
8045        }
8046
8047        if ($searchtype eq 'commit' ||
8048            $searchtype eq 'author' ||
8049            $searchtype eq 'committer') {
8050                git_search_message(%co);
8051        } elsif ($searchtype eq 'pickaxe') {
8052                git_search_changes(%co);
8053        } elsif ($searchtype eq 'grep') {
8054                git_search_files(%co);
8055        } else {
8056                die_error(400, "Unknown search type");
8057        }
8058}
8059
8060sub git_search_help {
8061        git_header_html();
8062        git_print_page_nav('','', $hash,$hash,$hash);
8063        print <<EOT;
8064<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8065regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8066the pattern entered is recognized as the POSIX extended
8067<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8068insensitive).</p>
8069<dl>
8070<dt><b>commit</b></dt>
8071<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8072EOT
8073        my $have_grep = gitweb_check_feature('grep');
8074        if ($have_grep) {
8075                print <<EOT;
8076<dt><b>grep</b></dt>
8077<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8078    a different one) are searched for the given pattern. On large trees, this search can take
8079a while and put some strain on the server, so please use it with some consideration. Note that
8080due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8081case-sensitive.</dd>
8082EOT
8083        }
8084        print <<EOT;
8085<dt><b>author</b></dt>
8086<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8087<dt><b>committer</b></dt>
8088<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8089EOT
8090        my $have_pickaxe = gitweb_check_feature('pickaxe');
8091        if ($have_pickaxe) {
8092                print <<EOT;
8093<dt><b>pickaxe</b></dt>
8094<dd>All commits that caused the string to appear or disappear from any file (changes that
8095added, removed or "modified" the string) will be listed. This search can take a while and
8096takes a lot of strain on the server, so please use it wisely. Note that since you may be
8097interested even in changes just changing the case as well, this search is case sensitive.</dd>
8098EOT
8099        }
8100        print "</dl>\n";
8101        git_footer_html();
8102}
8103
8104sub git_shortlog {
8105        git_log_generic('shortlog', \&git_shortlog_body,
8106                        $hash, $hash_parent);
8107}
8108
8109## ......................................................................
8110## feeds (RSS, Atom; OPML)
8111
8112sub git_feed {
8113        my $format = shift || 'atom';
8114        my $have_blame = gitweb_check_feature('blame');
8115
8116        # Atom: http://www.atomenabled.org/developers/syndication/
8117        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8118        if ($format ne 'rss' && $format ne 'atom') {
8119                die_error(400, "Unknown web feed format");
8120        }
8121
8122        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8123        my $head = $hash || 'HEAD';
8124        my @commitlist = parse_commits($head, 150, 0, $file_name);
8125
8126        my %latest_commit;
8127        my %latest_date;
8128        my $content_type = "application/$format+xml";
8129        if (defined $cgi->http('HTTP_ACCEPT') &&
8130                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8131                # browser (feed reader) prefers text/xml
8132                $content_type = 'text/xml';
8133        }
8134        if (defined($commitlist[0])) {
8135                %latest_commit = %{$commitlist[0]};
8136                my $latest_epoch = $latest_commit{'committer_epoch'};
8137                exit_if_unmodified_since($latest_epoch);
8138                %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8139        }
8140        print $cgi->header(
8141                -type => $content_type,
8142                -charset => 'utf-8',
8143                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8144                -status => '200 OK');
8145
8146        # Optimization: skip generating the body if client asks only
8147        # for Last-Modified date.
8148        return if ($cgi->request_method() eq 'HEAD');
8149
8150        # header variables
8151        my $title = "$site_name - $project/$action";
8152        my $feed_type = 'log';
8153        if (defined $hash) {
8154                $title .= " - '$hash'";
8155                $feed_type = 'branch log';
8156                if (defined $file_name) {
8157                        $title .= " :: $file_name";
8158                        $feed_type = 'history';
8159                }
8160        } elsif (defined $file_name) {
8161                $title .= " - $file_name";
8162                $feed_type = 'history';
8163        }
8164        $title .= " $feed_type";
8165        $title = esc_html($title);
8166        my $descr = git_get_project_description($project);
8167        if (defined $descr) {
8168                $descr = esc_html($descr);
8169        } else {
8170                $descr = "$project " .
8171                         ($format eq 'rss' ? 'RSS' : 'Atom') .
8172                         " feed";
8173        }
8174        my $owner = git_get_project_owner($project);
8175        $owner = esc_html($owner);
8176
8177        #header
8178        my $alt_url;
8179        if (defined $file_name) {
8180                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8181        } elsif (defined $hash) {
8182                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8183        } else {
8184                $alt_url = href(-full=>1, action=>"summary");
8185        }
8186        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8187        if ($format eq 'rss') {
8188                print <<XML;
8189<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8190<channel>
8191XML
8192                print "<title>$title</title>\n" .
8193                      "<link>$alt_url</link>\n" .
8194                      "<description>$descr</description>\n" .
8195                      "<language>en</language>\n" .
8196                      # project owner is responsible for 'editorial' content
8197                      "<managingEditor>$owner</managingEditor>\n";
8198                if (defined $logo || defined $favicon) {
8199                        # prefer the logo to the favicon, since RSS
8200                        # doesn't allow both
8201                        my $img = esc_url($logo || $favicon);
8202                        print "<image>\n" .
8203                              "<url>$img</url>\n" .
8204                              "<title>$title</title>\n" .
8205                              "<link>$alt_url</link>\n" .
8206                              "</image>\n";
8207                }
8208                if (%latest_date) {
8209                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8210                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8211                }
8212                print "<generator>gitweb v.$version/$git_version</generator>\n";
8213        } elsif ($format eq 'atom') {
8214                print <<XML;
8215<feed xmlns="http://www.w3.org/2005/Atom">
8216XML
8217                print "<title>$title</title>\n" .
8218                      "<subtitle>$descr</subtitle>\n" .
8219                      '<link rel="alternate" type="text/html" href="' .
8220                      $alt_url . '" />' . "\n" .
8221                      '<link rel="self" type="' . $content_type . '" href="' .
8222                      $cgi->self_url() . '" />' . "\n" .
8223                      "<id>" . href(-full=>1) . "</id>\n" .
8224                      # use project owner for feed author
8225                      "<author><name>$owner</name></author>\n";
8226                if (defined $favicon) {
8227                        print "<icon>" . esc_url($favicon) . "</icon>\n";
8228                }
8229                if (defined $logo) {
8230                        # not twice as wide as tall: 72 x 27 pixels
8231                        print "<logo>" . esc_url($logo) . "</logo>\n";
8232                }
8233                if (! %latest_date) {
8234                        # dummy date to keep the feed valid until commits trickle in:
8235                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
8236                } else {
8237                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
8238                }
8239                print "<generator version='$version/$git_version'>gitweb</generator>\n";
8240        }
8241
8242        # contents
8243        for (my $i = 0; $i <= $#commitlist; $i++) {
8244                my %co = %{$commitlist[$i]};
8245                my $commit = $co{'id'};
8246                # we read 150, we always show 30 and the ones more recent than 48 hours
8247                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8248                        last;
8249                }
8250                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8251
8252                # get list of changed files
8253                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8254                        $co{'parent'} || "--root",
8255                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
8256                        or next;
8257                my @difftree = map { chomp; $_ } <$fd>;
8258                close $fd
8259                        or next;
8260
8261                # print element (entry, item)
8262                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8263                if ($format eq 'rss') {
8264                        print "<item>\n" .
8265                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8266                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8267                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8268                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8269                              "<link>$co_url</link>\n" .
8270                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8271                              "<content:encoded>" .
8272                              "<![CDATA[\n";
8273                } elsif ($format eq 'atom') {
8274                        print "<entry>\n" .
8275                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8276                              "<updated>$cd{'iso-8601'}</updated>\n" .
8277                              "<author>\n" .
8278                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8279                        if ($co{'author_email'}) {
8280                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8281                        }
8282                        print "</author>\n" .
8283                              # use committer for contributor
8284                              "<contributor>\n" .
8285                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8286                        if ($co{'committer_email'}) {
8287                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8288                        }
8289                        print "</contributor>\n" .
8290                              "<published>$cd{'iso-8601'}</published>\n" .
8291                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8292                              "<id>$co_url</id>\n" .
8293                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8294                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8295                }
8296                my $comment = $co{'comment'};
8297                print "<pre>\n";
8298                foreach my $line (@$comment) {
8299                        $line = esc_html($line);
8300                        print "$line\n";
8301                }
8302                print "</pre><ul>\n";
8303                foreach my $difftree_line (@difftree) {
8304                        my %difftree = parse_difftree_raw_line($difftree_line);
8305                        next if !$difftree{'from_id'};
8306
8307                        my $file = $difftree{'file'} || $difftree{'to_file'};
8308
8309                        print "<li>" .
8310                              "[" .
8311                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8312                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8313                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8314                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8315                                      -title => "diff"}, 'D');
8316                        if ($have_blame) {
8317                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8318                                                             file_name=>$file, hash_base=>$commit),
8319                                              -title => "blame"}, 'B');
8320                        }
8321                        # if this is not a feed of a file history
8322                        if (!defined $file_name || $file_name ne $file) {
8323                                print $cgi->a({-href => href(-full=>1, action=>"history",
8324                                                             file_name=>$file, hash=>$commit),
8325                                              -title => "history"}, 'H');
8326                        }
8327                        $file = esc_path($file);
8328                        print "] ".
8329                              "$file</li>\n";
8330                }
8331                if ($format eq 'rss') {
8332                        print "</ul>]]>\n" .
8333                              "</content:encoded>\n" .
8334                              "</item>\n";
8335                } elsif ($format eq 'atom') {
8336                        print "</ul>\n</div>\n" .
8337                              "</content>\n" .
8338                              "</entry>\n";
8339                }
8340        }
8341
8342        # end of feed
8343        if ($format eq 'rss') {
8344                print "</channel>\n</rss>\n";
8345        } elsif ($format eq 'atom') {
8346                print "</feed>\n";
8347        }
8348}
8349
8350sub git_rss {
8351        git_feed('rss');
8352}
8353
8354sub git_atom {
8355        git_feed('atom');
8356}
8357
8358sub git_opml {
8359        my @list = git_get_projects_list($project_filter, $strict_export);
8360        if (!@list) {
8361                die_error(404, "No projects found");
8362        }
8363
8364        print $cgi->header(
8365                -type => 'text/xml',
8366                -charset => 'utf-8',
8367                -content_disposition => 'inline; filename="opml.xml"');
8368
8369        my $title = esc_html($site_name);
8370        my $filter = " within subdirectory ";
8371        if (defined $project_filter) {
8372                $filter .= esc_html($project_filter);
8373        } else {
8374                $filter = "";
8375        }
8376        print <<XML;
8377<?xml version="1.0" encoding="utf-8"?>
8378<opml version="1.0">
8379<head>
8380  <title>$title OPML Export$filter</title>
8381</head>
8382<body>
8383<outline text="git RSS feeds">
8384XML
8385
8386        foreach my $pr (@list) {
8387                my %proj = %$pr;
8388                my $head = git_get_head_hash($proj{'path'});
8389                if (!defined $head) {
8390                        next;
8391                }
8392                $git_dir = "$projectroot/$proj{'path'}";
8393                my %co = parse_commit($head);
8394                if (!%co) {
8395                        next;
8396                }
8397
8398                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8399                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8400                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8401                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8402        }
8403        print <<XML;
8404</outline>
8405</body>
8406</opml>
8407XML
8408}