gitweb / gitweb.perlon commit Git 1.8.0.2 (3e53891)
   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# name of your site or organization to appear in page titles
  89# replace this with something more descriptive for clearer bookmarks
  90our $site_name = "++GITWEB_SITENAME++"
  91                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93# html snippet to include in the <head> section of each page
  94our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95# filename of html text to include at top of each page
  96our $site_header = "++GITWEB_SITE_HEADER++";
  97# html text to include at home page
  98our $home_text = "++GITWEB_HOMETEXT++";
  99# filename of html text to include at bottom of each page
 100our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102# URI of stylesheets
 103our @stylesheets = ("++GITWEB_CSS++");
 104# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105our $stylesheet = undef;
 106# URI of GIT logo (72x27 size)
 107our $logo = "++GITWEB_LOGO++";
 108# URI of GIT favicon, assumed to be image/png type
 109our $favicon = "++GITWEB_FAVICON++";
 110# URI of gitweb.js (JavaScript code for gitweb)
 111our $javascript = "++GITWEB_JS++";
 112
 113# URI and label (title) of GIT logo link
 114#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115#our $logo_label = "git documentation";
 116our $logo_url = "http://git-scm.com/";
 117our $logo_label = "git homepage";
 118
 119# source of projects list
 120our $projects_list = "++GITWEB_LIST++";
 121
 122# the width (in characters) of the projects list "Description" column
 123our $projects_list_description_width = 25;
 124
 125# group projects by category on the projects list
 126# (enabled if this variable evaluates to true)
 127our $projects_list_group_categories = 0;
 128
 129# default category if none specified
 130# (leave the empty string for no category)
 131our $project_list_default_category = "";
 132
 133# default order of projects list
 134# valid values are none, project, descr, owner, and age
 135our $default_projects_order = "project";
 136
 137# show repository only if this file exists
 138# (only effective if this variable evaluates to true)
 139our $export_ok = "++GITWEB_EXPORT_OK++";
 140
 141# don't generate age column on the projects list page
 142our $omit_age_column = 0;
 143
 144# don't generate information about owners of repositories
 145our $omit_owner=0;
 146
 147# show repository only if this subroutine returns true
 148# when given the path to the project, for example:
 149#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 150our $export_auth_hook = undef;
 151
 152# only allow viewing of repositories also shown on the overview page
 153our $strict_export = "++GITWEB_STRICT_EXPORT++";
 154
 155# list of git base URLs used for URL to where fetch project from,
 156# i.e. full URL is "$git_base_url/$project"
 157our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 158
 159# default blob_plain mimetype and default charset for text/plain blob
 160our $default_blob_plain_mimetype = 'text/plain';
 161our $default_text_plain_charset  = undef;
 162
 163# file to use for guessing MIME types before trying /etc/mime.types
 164# (relative to the current git repository)
 165our $mimetypes_file = undef;
 166
 167# assume this charset if line contains non-UTF-8 characters;
 168# it should be valid encoding (see Encoding::Supported(3pm) for list),
 169# for which encoding all byte sequences are valid, for example
 170# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 171# could be even 'utf-8' for the old behavior)
 172our $fallback_encoding = 'latin1';
 173
 174# rename detection options for git-diff and git-diff-tree
 175# - default is '-M', with the cost proportional to
 176#   (number of removed files) * (number of new files).
 177# - more costly is '-C' (which implies '-M'), with the cost proportional to
 178#   (number of changed files + number of removed files) * (number of new files)
 179# - even more costly is '-C', '--find-copies-harder' with cost
 180#   (number of files in the original tree) * (number of new files)
 181# - one might want to include '-B' option, e.g. '-B', '-M'
 182our @diff_opts = ('-M'); # taken from git_commit
 183
 184# Disables features that would allow repository owners to inject script into
 185# the gitweb domain.
 186our $prevent_xss = 0;
 187
 188# Path to the highlight executable to use (must be the one from
 189# http://www.andre-simon.de due to assumptions about parameters and output).
 190# Useful if highlight is not installed on your webserver's PATH.
 191# [Default: highlight]
 192our $highlight_bin = "++HIGHLIGHT_BIN++";
 193
 194# information about snapshot formats that gitweb is capable of serving
 195our %known_snapshot_formats = (
 196        # name => {
 197        #       'display' => display name,
 198        #       'type' => mime type,
 199        #       'suffix' => filename suffix,
 200        #       'format' => --format for git-archive,
 201        #       'compressor' => [compressor command and arguments]
 202        #                       (array reference, optional)
 203        #       'disabled' => boolean (optional)}
 204        #
 205        'tgz' => {
 206                'display' => 'tar.gz',
 207                'type' => 'application/x-gzip',
 208                'suffix' => '.tar.gz',
 209                'format' => 'tar',
 210                'compressor' => ['gzip', '-n']},
 211
 212        'tbz2' => {
 213                'display' => 'tar.bz2',
 214                'type' => 'application/x-bzip2',
 215                'suffix' => '.tar.bz2',
 216                'format' => 'tar',
 217                'compressor' => ['bzip2']},
 218
 219        'txz' => {
 220                'display' => 'tar.xz',
 221                'type' => 'application/x-xz',
 222                'suffix' => '.tar.xz',
 223                'format' => 'tar',
 224                'compressor' => ['xz'],
 225                'disabled' => 1},
 226
 227        'zip' => {
 228                'display' => 'zip',
 229                'type' => 'application/x-zip',
 230                'suffix' => '.zip',
 231                'format' => 'zip'},
 232);
 233
 234# Aliases so we understand old gitweb.snapshot values in repository
 235# configuration.
 236our %known_snapshot_format_aliases = (
 237        'gzip'  => 'tgz',
 238        'bzip2' => 'tbz2',
 239        'xz'    => 'txz',
 240
 241        # backward compatibility: legacy gitweb config support
 242        'x-gzip' => undef, 'gz' => undef,
 243        'x-bzip2' => undef, 'bz2' => undef,
 244        'x-zip' => undef, '' => undef,
 245);
 246
 247# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 248# are changed, it may be appropriate to change these values too via
 249# $GITWEB_CONFIG.
 250our %avatar_size = (
 251        'default' => 16,
 252        'double'  => 32
 253);
 254
 255# Used to set the maximum load that we will still respond to gitweb queries.
 256# If server load exceed this value then return "503 server busy" error.
 257# If gitweb cannot determined server load, it is taken to be 0.
 258# Leave it undefined (or set to 'undef') to turn off load checking.
 259our $maxload = 300;
 260
 261# configuration for 'highlight' (http://www.andre-simon.de/)
 262# match by basename
 263our %highlight_basename = (
 264        #'Program' => 'py',
 265        #'Library' => 'py',
 266        'SConstruct' => 'py', # SCons equivalent of Makefile
 267        'Makefile' => 'make',
 268);
 269# match by extension
 270our %highlight_ext = (
 271        # main extensions, defining name of syntax;
 272        # see files in /usr/share/highlight/langDefs/ directory
 273        (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 274        # alternate extensions, see /etc/highlight/filetypes.conf
 275        (map { $_ => 'c'   } qw(c h)),
 276        (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 277        (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 278        (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 279        (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 280        (map { $_ => 'make'} qw(make mak mk)),
 281        (map { $_ => 'xml' } qw(xml xhtml html htm)),
 282);
 283
 284# You define site-wide feature defaults here; override them with
 285# $GITWEB_CONFIG as necessary.
 286our %feature = (
 287        # feature => {
 288        #       'sub' => feature-sub (subroutine),
 289        #       'override' => allow-override (boolean),
 290        #       'default' => [ default options...] (array reference)}
 291        #
 292        # if feature is overridable (it means that allow-override has true value),
 293        # then feature-sub will be called with default options as parameters;
 294        # return value of feature-sub indicates if to enable specified feature
 295        #
 296        # if there is no 'sub' key (no feature-sub), then feature cannot be
 297        # overridden
 298        #
 299        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 300        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 301        # is enabled
 302
 303        # Enable the 'blame' blob view, showing the last commit that modified
 304        # each line in the file. This can be very CPU-intensive.
 305
 306        # To enable system wide have in $GITWEB_CONFIG
 307        # $feature{'blame'}{'default'} = [1];
 308        # To have project specific config enable override in $GITWEB_CONFIG
 309        # $feature{'blame'}{'override'} = 1;
 310        # and in project config gitweb.blame = 0|1;
 311        'blame' => {
 312                'sub' => sub { feature_bool('blame', @_) },
 313                'override' => 0,
 314                'default' => [0]},
 315
 316        # Enable the 'snapshot' link, providing a compressed archive of any
 317        # tree. This can potentially generate high traffic if you have large
 318        # project.
 319
 320        # Value is a list of formats defined in %known_snapshot_formats that
 321        # you wish to offer.
 322        # To disable system wide have in $GITWEB_CONFIG
 323        # $feature{'snapshot'}{'default'} = [];
 324        # To have project specific config enable override in $GITWEB_CONFIG
 325        # $feature{'snapshot'}{'override'} = 1;
 326        # and in project config, a comma-separated list of formats or "none"
 327        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 328        'snapshot' => {
 329                'sub' => \&feature_snapshot,
 330                'override' => 0,
 331                'default' => ['tgz']},
 332
 333        # Enable text search, which will list the commits which match author,
 334        # committer or commit text to a given string.  Enabled by default.
 335        # Project specific override is not supported.
 336        #
 337        # Note that this controls all search features, which means that if
 338        # it is disabled, then 'grep' and 'pickaxe' search would also be
 339        # disabled.
 340        'search' => {
 341                'override' => 0,
 342                'default' => [1]},
 343
 344        # Enable grep search, which will list the files in currently selected
 345        # tree containing the given string. Enabled by default. This can be
 346        # potentially CPU-intensive, of course.
 347        # Note that you need to have 'search' feature enabled too.
 348
 349        # To enable system wide have in $GITWEB_CONFIG
 350        # $feature{'grep'}{'default'} = [1];
 351        # To have project specific config enable override in $GITWEB_CONFIG
 352        # $feature{'grep'}{'override'} = 1;
 353        # and in project config gitweb.grep = 0|1;
 354        'grep' => {
 355                'sub' => sub { feature_bool('grep', @_) },
 356                'override' => 0,
 357                'default' => [1]},
 358
 359        # Enable the pickaxe search, which will list the commits that modified
 360        # a given string in a file. This can be practical and quite faster
 361        # alternative to 'blame', but still potentially CPU-intensive.
 362        # Note that you need to have 'search' feature enabled too.
 363
 364        # To enable system wide have in $GITWEB_CONFIG
 365        # $feature{'pickaxe'}{'default'} = [1];
 366        # To have project specific config enable override in $GITWEB_CONFIG
 367        # $feature{'pickaxe'}{'override'} = 1;
 368        # and in project config gitweb.pickaxe = 0|1;
 369        'pickaxe' => {
 370                'sub' => sub { feature_bool('pickaxe', @_) },
 371                'override' => 0,
 372                'default' => [1]},
 373
 374        # Enable showing size of blobs in a 'tree' view, in a separate
 375        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 376
 377        # To disable system wide have in $GITWEB_CONFIG
 378        # $feature{'show-sizes'}{'default'} = [0];
 379        # To have project specific config enable override in $GITWEB_CONFIG
 380        # $feature{'show-sizes'}{'override'} = 1;
 381        # and in project config gitweb.showsizes = 0|1;
 382        'show-sizes' => {
 383                'sub' => sub { feature_bool('showsizes', @_) },
 384                'override' => 0,
 385                'default' => [1]},
 386
 387        # Make gitweb use an alternative format of the URLs which can be
 388        # more readable and natural-looking: project name is embedded
 389        # directly in the path and the query string contains other
 390        # auxiliary information. All gitweb installations recognize
 391        # URL in either format; this configures in which formats gitweb
 392        # generates links.
 393
 394        # To enable system wide have in $GITWEB_CONFIG
 395        # $feature{'pathinfo'}{'default'} = [1];
 396        # Project specific override is not supported.
 397
 398        # Note that you will need to change the default location of CSS,
 399        # favicon, logo and possibly other files to an absolute URL. Also,
 400        # if gitweb.cgi serves as your indexfile, you will need to force
 401        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 402        'pathinfo' => {
 403                'override' => 0,
 404                'default' => [0]},
 405
 406        # Make gitweb consider projects in project root subdirectories
 407        # to be forks of existing projects. Given project $projname.git,
 408        # projects matching $projname/*.git will not be shown in the main
 409        # projects list, instead a '+' mark will be added to $projname
 410        # there and a 'forks' view will be enabled for the project, listing
 411        # all the forks. If project list is taken from a file, forks have
 412        # to be listed after the main project.
 413
 414        # To enable system wide have in $GITWEB_CONFIG
 415        # $feature{'forks'}{'default'} = [1];
 416        # Project specific override is not supported.
 417        'forks' => {
 418                'override' => 0,
 419                'default' => [0]},
 420
 421        # Insert custom links to the action bar of all project pages.
 422        # This enables you mainly to link to third-party scripts integrating
 423        # into gitweb; e.g. git-browser for graphical history representation
 424        # or custom web-based repository administration interface.
 425
 426        # The 'default' value consists of a list of triplets in the form
 427        # (label, link, position) where position is the label after which
 428        # to insert the link and link is a format string where %n expands
 429        # to the project name, %f to the project path within the filesystem,
 430        # %h to the current hash (h gitweb parameter) and %b to the current
 431        # hash base (hb gitweb parameter); %% expands to %.
 432
 433        # To enable system wide have in $GITWEB_CONFIG e.g.
 434        # $feature{'actions'}{'default'} = [('graphiclog',
 435        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 436        # Project specific override is not supported.
 437        'actions' => {
 438                'override' => 0,
 439                'default' => []},
 440
 441        # Allow gitweb scan project content tags of project repository,
 442        # and display the popular Web 2.0-ish "tag cloud" near the projects
 443        # list.  Note that this is something COMPLETELY different from the
 444        # normal Git tags.
 445
 446        # gitweb by itself can show existing tags, but it does not handle
 447        # tagging itself; you need to do it externally, outside gitweb.
 448        # The format is described in git_get_project_ctags() subroutine.
 449        # You may want to install the HTML::TagCloud Perl module to get
 450        # a pretty tag cloud instead of just a list of tags.
 451
 452        # To enable system wide have in $GITWEB_CONFIG
 453        # $feature{'ctags'}{'default'} = [1];
 454        # Project specific override is not supported.
 455
 456        # In the future whether ctags editing is enabled might depend
 457        # on the value, but using 1 should always mean no editing of ctags.
 458        'ctags' => {
 459                'override' => 0,
 460                'default' => [0]},
 461
 462        # The maximum number of patches in a patchset generated in patch
 463        # view. Set this to 0 or undef to disable patch view, or to a
 464        # negative number to remove any limit.
 465
 466        # To disable system wide have in $GITWEB_CONFIG
 467        # $feature{'patches'}{'default'} = [0];
 468        # To have project specific config enable override in $GITWEB_CONFIG
 469        # $feature{'patches'}{'override'} = 1;
 470        # and in project config gitweb.patches = 0|n;
 471        # where n is the maximum number of patches allowed in a patchset.
 472        'patches' => {
 473                'sub' => \&feature_patches,
 474                'override' => 0,
 475                'default' => [16]},
 476
 477        # Avatar support. When this feature is enabled, views such as
 478        # shortlog or commit will display an avatar associated with
 479        # the email of the committer(s) and/or author(s).
 480
 481        # Currently available providers are gravatar and picon.
 482        # If an unknown provider is specified, the feature is disabled.
 483
 484        # Gravatar depends on Digest::MD5.
 485        # Picon currently relies on the indiana.edu database.
 486
 487        # To enable system wide have in $GITWEB_CONFIG
 488        # $feature{'avatar'}{'default'} = ['<provider>'];
 489        # where <provider> is either gravatar or picon.
 490        # To have project specific config enable override in $GITWEB_CONFIG
 491        # $feature{'avatar'}{'override'} = 1;
 492        # and in project config gitweb.avatar = <provider>;
 493        'avatar' => {
 494                'sub' => \&feature_avatar,
 495                'override' => 0,
 496                'default' => ['']},
 497
 498        # Enable displaying how much time and how many git commands
 499        # it took to generate and display page.  Disabled by default.
 500        # Project specific override is not supported.
 501        'timed' => {
 502                'override' => 0,
 503                'default' => [0]},
 504
 505        # Enable turning some links into links to actions which require
 506        # JavaScript to run (like 'blame_incremental').  Not enabled by
 507        # default.  Project specific override is currently not supported.
 508        'javascript-actions' => {
 509                'override' => 0,
 510                'default' => [0]},
 511
 512        # Enable and configure ability to change common timezone for dates
 513        # in gitweb output via JavaScript.  Enabled by default.
 514        # Project specific override is not supported.
 515        'javascript-timezone' => {
 516                'override' => 0,
 517                'default' => [
 518                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 519                                     # or undef to turn off this feature
 520                        'gitweb_tz', # name of cookie where to store selected timezone
 521                        'datetime',  # CSS class used to mark up dates for manipulation
 522                ]},
 523
 524        # Syntax highlighting support. This is based on Daniel Svensson's
 525        # and Sham Chukoury's work in gitweb-xmms2.git.
 526        # It requires the 'highlight' program present in $PATH,
 527        # and therefore is disabled by default.
 528
 529        # To enable system wide have in $GITWEB_CONFIG
 530        # $feature{'highlight'}{'default'} = [1];
 531
 532        'highlight' => {
 533                'sub' => sub { feature_bool('highlight', @_) },
 534                'override' => 0,
 535                'default' => [0]},
 536
 537        # Enable displaying of remote heads in the heads list
 538
 539        # To enable system wide have in $GITWEB_CONFIG
 540        # $feature{'remote_heads'}{'default'} = [1];
 541        # To have project specific config enable override in $GITWEB_CONFIG
 542        # $feature{'remote_heads'}{'override'} = 1;
 543        # and in project config gitweb.remote_heads = 0|1;
 544        'remote_heads' => {
 545                'sub' => sub { feature_bool('remote_heads', @_) },
 546                'override' => 0,
 547                'default' => [0]},
 548);
 549
 550sub gitweb_get_feature {
 551        my ($name) = @_;
 552        return unless exists $feature{$name};
 553        my ($sub, $override, @defaults) = (
 554                $feature{$name}{'sub'},
 555                $feature{$name}{'override'},
 556                @{$feature{$name}{'default'}});
 557        # project specific override is possible only if we have project
 558        our $git_dir; # global variable, declared later
 559        if (!$override || !defined $git_dir) {
 560                return @defaults;
 561        }
 562        if (!defined $sub) {
 563                warn "feature $name is not overridable";
 564                return @defaults;
 565        }
 566        return $sub->(@defaults);
 567}
 568
 569# A wrapper to check if a given feature is enabled.
 570# With this, you can say
 571#
 572#   my $bool_feat = gitweb_check_feature('bool_feat');
 573#   gitweb_check_feature('bool_feat') or somecode;
 574#
 575# instead of
 576#
 577#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 578#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 579#
 580sub gitweb_check_feature {
 581        return (gitweb_get_feature(@_))[0];
 582}
 583
 584
 585sub feature_bool {
 586        my $key = shift;
 587        my ($val) = git_get_project_config($key, '--bool');
 588
 589        if (!defined $val) {
 590                return ($_[0]);
 591        } elsif ($val eq 'true') {
 592                return (1);
 593        } elsif ($val eq 'false') {
 594                return (0);
 595        }
 596}
 597
 598sub feature_snapshot {
 599        my (@fmts) = @_;
 600
 601        my ($val) = git_get_project_config('snapshot');
 602
 603        if ($val) {
 604                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 605        }
 606
 607        return @fmts;
 608}
 609
 610sub feature_patches {
 611        my @val = (git_get_project_config('patches', '--int'));
 612
 613        if (@val) {
 614                return @val;
 615        }
 616
 617        return ($_[0]);
 618}
 619
 620sub feature_avatar {
 621        my @val = (git_get_project_config('avatar'));
 622
 623        return @val ? @val : @_;
 624}
 625
 626# checking HEAD file with -e is fragile if the repository was
 627# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 628# and then pruned.
 629sub check_head_link {
 630        my ($dir) = @_;
 631        my $headfile = "$dir/HEAD";
 632        return ((-e $headfile) ||
 633                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 634}
 635
 636sub check_export_ok {
 637        my ($dir) = @_;
 638        return (check_head_link($dir) &&
 639                (!$export_ok || -e "$dir/$export_ok") &&
 640                (!$export_auth_hook || $export_auth_hook->($dir)));
 641}
 642
 643# process alternate names for backward compatibility
 644# filter out unsupported (unknown) snapshot formats
 645sub filter_snapshot_fmts {
 646        my @fmts = @_;
 647
 648        @fmts = map {
 649                exists $known_snapshot_format_aliases{$_} ?
 650                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 651        @fmts = grep {
 652                exists $known_snapshot_formats{$_} &&
 653                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 654}
 655
 656# If it is set to code reference, it is code that it is to be run once per
 657# request, allowing updating configurations that change with each request,
 658# while running other code in config file only once.
 659#
 660# Otherwise, if it is false then gitweb would process config file only once;
 661# if it is true then gitweb config would be run for each request.
 662our $per_request_config = 1;
 663
 664# read and parse gitweb config file given by its parameter.
 665# returns true on success, false on recoverable error, allowing
 666# to chain this subroutine, using first file that exists.
 667# dies on errors during parsing config file, as it is unrecoverable.
 668sub read_config_file {
 669        my $filename = shift;
 670        return unless defined $filename;
 671        # die if there are errors parsing config file
 672        if (-e $filename) {
 673                do $filename;
 674                die $@ if $@;
 675                return 1;
 676        }
 677        return;
 678}
 679
 680our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 681sub evaluate_gitweb_config {
 682        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 683        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 684        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 685
 686        # Protect agains duplications of file names, to not read config twice.
 687        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 688        # there possibility of duplication of filename there doesn't matter.
 689        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 690        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 691
 692        # Common system-wide settings for convenience.
 693        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 694        read_config_file($GITWEB_CONFIG_COMMON);
 695
 696        # Use first config file that exists.  This means use the per-instance
 697        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 698        read_config_file($GITWEB_CONFIG) and return;
 699        read_config_file($GITWEB_CONFIG_SYSTEM);
 700}
 701
 702# Get loadavg of system, to compare against $maxload.
 703# Currently it requires '/proc/loadavg' present to get loadavg;
 704# if it is not present it returns 0, which means no load checking.
 705sub get_loadavg {
 706        if( -e '/proc/loadavg' ){
 707                open my $fd, '<', '/proc/loadavg'
 708                        or return 0;
 709                my @load = split(/\s+/, scalar <$fd>);
 710                close $fd;
 711
 712                # The first three columns measure CPU and IO utilization of the last one,
 713                # five, and 10 minute periods.  The fourth column shows the number of
 714                # currently running processes and the total number of processes in the m/n
 715                # format.  The last column displays the last process ID used.
 716                return $load[0] || 0;
 717        }
 718        # additional checks for load average should go here for things that don't export
 719        # /proc/loadavg
 720
 721        return 0;
 722}
 723
 724# version of the core git binary
 725our $git_version;
 726sub evaluate_git_version {
 727        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 728        $number_of_git_cmds++;
 729}
 730
 731sub check_loadavg {
 732        if (defined $maxload && get_loadavg() > $maxload) {
 733                die_error(503, "The load average on the server is too high");
 734        }
 735}
 736
 737# ======================================================================
 738# input validation and dispatch
 739
 740# input parameters can be collected from a variety of sources (presently, CGI
 741# and PATH_INFO), so we define an %input_params hash that collects them all
 742# together during validation: this allows subsequent uses (e.g. href()) to be
 743# agnostic of the parameter origin
 744
 745our %input_params = ();
 746
 747# input parameters are stored with the long parameter name as key. This will
 748# also be used in the href subroutine to convert parameters to their CGI
 749# equivalent, and since the href() usage is the most frequent one, we store
 750# the name -> CGI key mapping here, instead of the reverse.
 751#
 752# XXX: Warning: If you touch this, check the search form for updating,
 753# too.
 754
 755our @cgi_param_mapping = (
 756        project => "p",
 757        action => "a",
 758        file_name => "f",
 759        file_parent => "fp",
 760        hash => "h",
 761        hash_parent => "hp",
 762        hash_base => "hb",
 763        hash_parent_base => "hpb",
 764        page => "pg",
 765        order => "o",
 766        searchtext => "s",
 767        searchtype => "st",
 768        snapshot_format => "sf",
 769        extra_options => "opt",
 770        search_use_regexp => "sr",
 771        ctag => "by_tag",
 772        diff_style => "ds",
 773        project_filter => "pf",
 774        # this must be last entry (for manipulation from JavaScript)
 775        javascript => "js"
 776);
 777our %cgi_param_mapping = @cgi_param_mapping;
 778
 779# we will also need to know the possible actions, for validation
 780our %actions = (
 781        "blame" => \&git_blame,
 782        "blame_incremental" => \&git_blame_incremental,
 783        "blame_data" => \&git_blame_data,
 784        "blobdiff" => \&git_blobdiff,
 785        "blobdiff_plain" => \&git_blobdiff_plain,
 786        "blob" => \&git_blob,
 787        "blob_plain" => \&git_blob_plain,
 788        "commitdiff" => \&git_commitdiff,
 789        "commitdiff_plain" => \&git_commitdiff_plain,
 790        "commit" => \&git_commit,
 791        "forks" => \&git_forks,
 792        "heads" => \&git_heads,
 793        "history" => \&git_history,
 794        "log" => \&git_log,
 795        "patch" => \&git_patch,
 796        "patches" => \&git_patches,
 797        "remotes" => \&git_remotes,
 798        "rss" => \&git_rss,
 799        "atom" => \&git_atom,
 800        "search" => \&git_search,
 801        "search_help" => \&git_search_help,
 802        "shortlog" => \&git_shortlog,
 803        "summary" => \&git_summary,
 804        "tag" => \&git_tag,
 805        "tags" => \&git_tags,
 806        "tree" => \&git_tree,
 807        "snapshot" => \&git_snapshot,
 808        "object" => \&git_object,
 809        # those below don't need $project
 810        "opml" => \&git_opml,
 811        "project_list" => \&git_project_list,
 812        "project_index" => \&git_project_index,
 813);
 814
 815# finally, we have the hash of allowed extra_options for the commands that
 816# allow them
 817our %allowed_options = (
 818        "--no-merges" => [ qw(rss atom log shortlog history) ],
 819);
 820
 821# fill %input_params with the CGI parameters. All values except for 'opt'
 822# should be single values, but opt can be an array. We should probably
 823# build an array of parameters that can be multi-valued, but since for the time
 824# being it's only this one, we just single it out
 825sub evaluate_query_params {
 826        our $cgi;
 827
 828        while (my ($name, $symbol) = each %cgi_param_mapping) {
 829                if ($symbol eq 'opt') {
 830                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 831                } else {
 832                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 833                }
 834        }
 835}
 836
 837# now read PATH_INFO and update the parameter list for missing parameters
 838sub evaluate_path_info {
 839        return if defined $input_params{'project'};
 840        return if !$path_info;
 841        $path_info =~ s,^/+,,;
 842        return if !$path_info;
 843
 844        # find which part of PATH_INFO is project
 845        my $project = $path_info;
 846        $project =~ s,/+$,,;
 847        while ($project && !check_head_link("$projectroot/$project")) {
 848                $project =~ s,/*[^/]*$,,;
 849        }
 850        return unless $project;
 851        $input_params{'project'} = $project;
 852
 853        # do not change any parameters if an action is given using the query string
 854        return if $input_params{'action'};
 855        $path_info =~ s,^\Q$project\E/*,,;
 856
 857        # next, check if we have an action
 858        my $action = $path_info;
 859        $action =~ s,/.*$,,;
 860        if (exists $actions{$action}) {
 861                $path_info =~ s,^$action/*,,;
 862                $input_params{'action'} = $action;
 863        }
 864
 865        # list of actions that want hash_base instead of hash, but can have no
 866        # pathname (f) parameter
 867        my @wants_base = (
 868                'tree',
 869                'history',
 870        );
 871
 872        # we want to catch, among others
 873        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 874        my ($parentrefname, $parentpathname, $refname, $pathname) =
 875                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 876
 877        # first, analyze the 'current' part
 878        if (defined $pathname) {
 879                # we got "branch:filename" or "branch:dir/"
 880                # we could use git_get_type(branch:pathname), but:
 881                # - it needs $git_dir
 882                # - it does a git() call
 883                # - the convention of terminating directories with a slash
 884                #   makes it superfluous
 885                # - embedding the action in the PATH_INFO would make it even
 886                #   more superfluous
 887                $pathname =~ s,^/+,,;
 888                if (!$pathname || substr($pathname, -1) eq "/") {
 889                        $input_params{'action'} ||= "tree";
 890                        $pathname =~ s,/$,,;
 891                } else {
 892                        # the default action depends on whether we had parent info
 893                        # or not
 894                        if ($parentrefname) {
 895                                $input_params{'action'} ||= "blobdiff_plain";
 896                        } else {
 897                                $input_params{'action'} ||= "blob_plain";
 898                        }
 899                }
 900                $input_params{'hash_base'} ||= $refname;
 901                $input_params{'file_name'} ||= $pathname;
 902        } elsif (defined $refname) {
 903                # we got "branch". In this case we have to choose if we have to
 904                # set hash or hash_base.
 905                #
 906                # Most of the actions without a pathname only want hash to be
 907                # set, except for the ones specified in @wants_base that want
 908                # hash_base instead. It should also be noted that hand-crafted
 909                # links having 'history' as an action and no pathname or hash
 910                # set will fail, but that happens regardless of PATH_INFO.
 911                if (defined $parentrefname) {
 912                        # if there is parent let the default be 'shortlog' action
 913                        # (for http://git.example.com/repo.git/A..B links); if there
 914                        # is no parent, dispatch will detect type of object and set
 915                        # action appropriately if required (if action is not set)
 916                        $input_params{'action'} ||= "shortlog";
 917                }
 918                if ($input_params{'action'} &&
 919                    grep { $_ eq $input_params{'action'} } @wants_base) {
 920                        $input_params{'hash_base'} ||= $refname;
 921                } else {
 922                        $input_params{'hash'} ||= $refname;
 923                }
 924        }
 925
 926        # next, handle the 'parent' part, if present
 927        if (defined $parentrefname) {
 928                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 929                # someproject/blobdiff/oldrev..newrev:/filename
 930                if ($parentpathname) {
 931                        $parentpathname =~ s,^/+,,;
 932                        $parentpathname =~ s,/$,,;
 933                        $input_params{'file_parent'} ||= $parentpathname;
 934                } else {
 935                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 936                }
 937                # we assume that hash_parent_base is wanted if a path was specified,
 938                # or if the action wants hash_base instead of hash
 939                if (defined $input_params{'file_parent'} ||
 940                        grep { $_ eq $input_params{'action'} } @wants_base) {
 941                        $input_params{'hash_parent_base'} ||= $parentrefname;
 942                } else {
 943                        $input_params{'hash_parent'} ||= $parentrefname;
 944                }
 945        }
 946
 947        # for the snapshot action, we allow URLs in the form
 948        # $project/snapshot/$hash.ext
 949        # where .ext determines the snapshot and gets removed from the
 950        # passed $refname to provide the $hash.
 951        #
 952        # To be able to tell that $refname includes the format extension, we
 953        # require the following two conditions to be satisfied:
 954        # - the hash input parameter MUST have been set from the $refname part
 955        #   of the URL (i.e. they must be equal)
 956        # - the snapshot format MUST NOT have been defined already (e.g. from
 957        #   CGI parameter sf)
 958        # It's also useless to try any matching unless $refname has a dot,
 959        # so we check for that too
 960        if (defined $input_params{'action'} &&
 961                $input_params{'action'} eq 'snapshot' &&
 962                defined $refname && index($refname, '.') != -1 &&
 963                $refname eq $input_params{'hash'} &&
 964                !defined $input_params{'snapshot_format'}) {
 965                # We loop over the known snapshot formats, checking for
 966                # extensions. Allowed extensions are both the defined suffix
 967                # (which includes the initial dot already) and the snapshot
 968                # format key itself, with a prepended dot
 969                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 970                        my $hash = $refname;
 971                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 972                                next;
 973                        }
 974                        my $sfx = $1;
 975                        # a valid suffix was found, so set the snapshot format
 976                        # and reset the hash parameter
 977                        $input_params{'snapshot_format'} = $fmt;
 978                        $input_params{'hash'} = $hash;
 979                        # we also set the format suffix to the one requested
 980                        # in the URL: this way a request for e.g. .tgz returns
 981                        # a .tgz instead of a .tar.gz
 982                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 983                        last;
 984                }
 985        }
 986}
 987
 988our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 989     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 990     $searchtext, $search_regexp, $project_filter);
 991sub evaluate_and_validate_params {
 992        our $action = $input_params{'action'};
 993        if (defined $action) {
 994                if (!validate_action($action)) {
 995                        die_error(400, "Invalid action parameter");
 996                }
 997        }
 998
 999        # parameters which are pathnames
1000        our $project = $input_params{'project'};
1001        if (defined $project) {
1002                if (!validate_project($project)) {
1003                        undef $project;
1004                        die_error(404, "No such project");
1005                }
1006        }
1007
1008        our $project_filter = $input_params{'project_filter'};
1009        if (defined $project_filter) {
1010                if (!validate_pathname($project_filter)) {
1011                        die_error(404, "Invalid project_filter parameter");
1012                }
1013        }
1014
1015        our $file_name = $input_params{'file_name'};
1016        if (defined $file_name) {
1017                if (!validate_pathname($file_name)) {
1018                        die_error(400, "Invalid file parameter");
1019                }
1020        }
1021
1022        our $file_parent = $input_params{'file_parent'};
1023        if (defined $file_parent) {
1024                if (!validate_pathname($file_parent)) {
1025                        die_error(400, "Invalid file parent parameter");
1026                }
1027        }
1028
1029        # parameters which are refnames
1030        our $hash = $input_params{'hash'};
1031        if (defined $hash) {
1032                if (!validate_refname($hash)) {
1033                        die_error(400, "Invalid hash parameter");
1034                }
1035        }
1036
1037        our $hash_parent = $input_params{'hash_parent'};
1038        if (defined $hash_parent) {
1039                if (!validate_refname($hash_parent)) {
1040                        die_error(400, "Invalid hash parent parameter");
1041                }
1042        }
1043
1044        our $hash_base = $input_params{'hash_base'};
1045        if (defined $hash_base) {
1046                if (!validate_refname($hash_base)) {
1047                        die_error(400, "Invalid hash base parameter");
1048                }
1049        }
1050
1051        our @extra_options = @{$input_params{'extra_options'}};
1052        # @extra_options is always defined, since it can only be (currently) set from
1053        # CGI, and $cgi->param() returns the empty array in array context if the param
1054        # is not set
1055        foreach my $opt (@extra_options) {
1056                if (not exists $allowed_options{$opt}) {
1057                        die_error(400, "Invalid option parameter");
1058                }
1059                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1060                        die_error(400, "Invalid option parameter for this action");
1061                }
1062        }
1063
1064        our $hash_parent_base = $input_params{'hash_parent_base'};
1065        if (defined $hash_parent_base) {
1066                if (!validate_refname($hash_parent_base)) {
1067                        die_error(400, "Invalid hash parent base parameter");
1068                }
1069        }
1070
1071        # other parameters
1072        our $page = $input_params{'page'};
1073        if (defined $page) {
1074                if ($page =~ m/[^0-9]/) {
1075                        die_error(400, "Invalid page parameter");
1076                }
1077        }
1078
1079        our $searchtype = $input_params{'searchtype'};
1080        if (defined $searchtype) {
1081                if ($searchtype =~ m/[^a-z]/) {
1082                        die_error(400, "Invalid searchtype parameter");
1083                }
1084        }
1085
1086        our $search_use_regexp = $input_params{'search_use_regexp'};
1087
1088        our $searchtext = $input_params{'searchtext'};
1089        our $search_regexp;
1090        if (defined $searchtext) {
1091                if (length($searchtext) < 2) {
1092                        die_error(403, "At least two characters are required for search parameter");
1093                }
1094                if ($search_use_regexp) {
1095                        $search_regexp = $searchtext;
1096                        if (!eval { qr/$search_regexp/; 1; }) {
1097                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1098                                die_error(400, "Invalid search regexp '$search_regexp'",
1099                                          esc_html($error));
1100                        }
1101                } else {
1102                        $search_regexp = quotemeta $searchtext;
1103                }
1104        }
1105}
1106
1107# path to the current git repository
1108our $git_dir;
1109sub evaluate_git_dir {
1110        our $git_dir = "$projectroot/$project" if $project;
1111}
1112
1113our (@snapshot_fmts, $git_avatar);
1114sub configure_gitweb_features {
1115        # list of supported snapshot formats
1116        our @snapshot_fmts = gitweb_get_feature('snapshot');
1117        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1118
1119        # check that the avatar feature is set to a known provider name,
1120        # and for each provider check if the dependencies are satisfied.
1121        # if the provider name is invalid or the dependencies are not met,
1122        # reset $git_avatar to the empty string.
1123        our ($git_avatar) = gitweb_get_feature('avatar');
1124        if ($git_avatar eq 'gravatar') {
1125                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1126        } elsif ($git_avatar eq 'picon') {
1127                # no dependencies
1128        } else {
1129                $git_avatar = '';
1130        }
1131}
1132
1133# custom error handler: 'die <message>' is Internal Server Error
1134sub handle_errors_html {
1135        my $msg = shift; # it is already HTML escaped
1136
1137        # to avoid infinite loop where error occurs in die_error,
1138        # change handler to default handler, disabling handle_errors_html
1139        set_message("Error occured when inside die_error:\n$msg");
1140
1141        # you cannot jump out of die_error when called as error handler;
1142        # the subroutine set via CGI::Carp::set_message is called _after_
1143        # HTTP headers are already written, so it cannot write them itself
1144        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1145}
1146set_message(\&handle_errors_html);
1147
1148# dispatch
1149sub dispatch {
1150        if (!defined $action) {
1151                if (defined $hash) {
1152                        $action = git_get_type($hash);
1153                        $action or die_error(404, "Object does not exist");
1154                } elsif (defined $hash_base && defined $file_name) {
1155                        $action = git_get_type("$hash_base:$file_name");
1156                        $action or die_error(404, "File or directory does not exist");
1157                } elsif (defined $project) {
1158                        $action = 'summary';
1159                } else {
1160                        $action = 'project_list';
1161                }
1162        }
1163        if (!defined($actions{$action})) {
1164                die_error(400, "Unknown action");
1165        }
1166        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1167            !$project) {
1168                die_error(400, "Project needed");
1169        }
1170        $actions{$action}->();
1171}
1172
1173sub reset_timer {
1174        our $t0 = [ gettimeofday() ]
1175                if defined $t0;
1176        our $number_of_git_cmds = 0;
1177}
1178
1179our $first_request = 1;
1180sub run_request {
1181        reset_timer();
1182
1183        evaluate_uri();
1184        if ($first_request) {
1185                evaluate_gitweb_config();
1186                evaluate_git_version();
1187        }
1188        if ($per_request_config) {
1189                if (ref($per_request_config) eq 'CODE') {
1190                        $per_request_config->();
1191                } elsif (!$first_request) {
1192                        evaluate_gitweb_config();
1193                }
1194        }
1195        check_loadavg();
1196
1197        # $projectroot and $projects_list might be set in gitweb config file
1198        $projects_list ||= $projectroot;
1199
1200        evaluate_query_params();
1201        evaluate_path_info();
1202        evaluate_and_validate_params();
1203        evaluate_git_dir();
1204
1205        configure_gitweb_features();
1206
1207        dispatch();
1208}
1209
1210our $is_last_request = sub { 1 };
1211our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1212our $CGI = 'CGI';
1213our $cgi;
1214sub configure_as_fcgi {
1215        require CGI::Fast;
1216        our $CGI = 'CGI::Fast';
1217
1218        my $request_number = 0;
1219        # let each child service 100 requests
1220        our $is_last_request = sub { ++$request_number > 100 };
1221}
1222sub evaluate_argv {
1223        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1224        configure_as_fcgi()
1225                if $script_name =~ /\.fcgi$/;
1226
1227        return unless (@ARGV);
1228
1229        require Getopt::Long;
1230        Getopt::Long::GetOptions(
1231                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1232                'nproc|n=i' => sub {
1233                        my ($arg, $val) = @_;
1234                        return unless eval { require FCGI::ProcManager; 1; };
1235                        my $proc_manager = FCGI::ProcManager->new({
1236                                n_processes => $val,
1237                        });
1238                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1239                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1240                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1241                },
1242        );
1243}
1244
1245sub run {
1246        evaluate_argv();
1247
1248        $first_request = 1;
1249        $pre_listen_hook->()
1250                if $pre_listen_hook;
1251
1252 REQUEST:
1253        while ($cgi = $CGI->new()) {
1254                $pre_dispatch_hook->()
1255                        if $pre_dispatch_hook;
1256
1257                run_request();
1258
1259                $post_dispatch_hook->()
1260                        if $post_dispatch_hook;
1261                $first_request = 0;
1262
1263                last REQUEST if ($is_last_request->());
1264        }
1265
1266 DONE_GITWEB:
1267        1;
1268}
1269
1270run();
1271
1272if (defined caller) {
1273        # wrapped in a subroutine processing requests,
1274        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1275        return;
1276} else {
1277        # pure CGI script, serving single request
1278        exit;
1279}
1280
1281## ======================================================================
1282## action links
1283
1284# possible values of extra options
1285# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1286# -replay => 1      - start from a current view (replay with modifications)
1287# -path_info => 0|1 - don't use/use path_info URL (if possible)
1288# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1289sub href {
1290        my %params = @_;
1291        # default is to use -absolute url() i.e. $my_uri
1292        my $href = $params{-full} ? $my_url : $my_uri;
1293
1294        # implicit -replay, must be first of implicit params
1295        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1296
1297        $params{'project'} = $project unless exists $params{'project'};
1298
1299        if ($params{-replay}) {
1300                while (my ($name, $symbol) = each %cgi_param_mapping) {
1301                        if (!exists $params{$name}) {
1302                                $params{$name} = $input_params{$name};
1303                        }
1304                }
1305        }
1306
1307        my $use_pathinfo = gitweb_check_feature('pathinfo');
1308        if (defined $params{'project'} &&
1309            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1310                # try to put as many parameters as possible in PATH_INFO:
1311                #   - project name
1312                #   - action
1313                #   - hash_parent or hash_parent_base:/file_parent
1314                #   - hash or hash_base:/filename
1315                #   - the snapshot_format as an appropriate suffix
1316
1317                # When the script is the root DirectoryIndex for the domain,
1318                # $href here would be something like http://gitweb.example.com/
1319                # Thus, we strip any trailing / from $href, to spare us double
1320                # slashes in the final URL
1321                $href =~ s,/$,,;
1322
1323                # Then add the project name, if present
1324                $href .= "/".esc_path_info($params{'project'});
1325                delete $params{'project'};
1326
1327                # since we destructively absorb parameters, we keep this
1328                # boolean that remembers if we're handling a snapshot
1329                my $is_snapshot = $params{'action'} eq 'snapshot';
1330
1331                # Summary just uses the project path URL, any other action is
1332                # added to the URL
1333                if (defined $params{'action'}) {
1334                        $href .= "/".esc_path_info($params{'action'})
1335                                unless $params{'action'} eq 'summary';
1336                        delete $params{'action'};
1337                }
1338
1339                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1340                # stripping nonexistent or useless pieces
1341                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1342                        || $params{'hash_parent'} || $params{'hash'});
1343                if (defined $params{'hash_base'}) {
1344                        if (defined $params{'hash_parent_base'}) {
1345                                $href .= esc_path_info($params{'hash_parent_base'});
1346                                # skip the file_parent if it's the same as the file_name
1347                                if (defined $params{'file_parent'}) {
1348                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1349                                                delete $params{'file_parent'};
1350                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1351                                                $href .= ":/".esc_path_info($params{'file_parent'});
1352                                                delete $params{'file_parent'};
1353                                        }
1354                                }
1355                                $href .= "..";
1356                                delete $params{'hash_parent'};
1357                                delete $params{'hash_parent_base'};
1358                        } elsif (defined $params{'hash_parent'}) {
1359                                $href .= esc_path_info($params{'hash_parent'}). "..";
1360                                delete $params{'hash_parent'};
1361                        }
1362
1363                        $href .= esc_path_info($params{'hash_base'});
1364                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1365                                $href .= ":/".esc_path_info($params{'file_name'});
1366                                delete $params{'file_name'};
1367                        }
1368                        delete $params{'hash'};
1369                        delete $params{'hash_base'};
1370                } elsif (defined $params{'hash'}) {
1371                        $href .= esc_path_info($params{'hash'});
1372                        delete $params{'hash'};
1373                }
1374
1375                # If the action was a snapshot, we can absorb the
1376                # snapshot_format parameter too
1377                if ($is_snapshot) {
1378                        my $fmt = $params{'snapshot_format'};
1379                        # snapshot_format should always be defined when href()
1380                        # is called, but just in case some code forgets, we
1381                        # fall back to the default
1382                        $fmt ||= $snapshot_fmts[0];
1383                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1384                        delete $params{'snapshot_format'};
1385                }
1386        }
1387
1388        # now encode the parameters explicitly
1389        my @result = ();
1390        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1391                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1392                if (defined $params{$name}) {
1393                        if (ref($params{$name}) eq "ARRAY") {
1394                                foreach my $par (@{$params{$name}}) {
1395                                        push @result, $symbol . "=" . esc_param($par);
1396                                }
1397                        } else {
1398                                push @result, $symbol . "=" . esc_param($params{$name});
1399                        }
1400                }
1401        }
1402        $href .= "?" . join(';', @result) if scalar @result;
1403
1404        # final transformation: trailing spaces must be escaped (URI-encoded)
1405        $href =~ s/(\s+)$/CGI::escape($1)/e;
1406
1407        if ($params{-anchor}) {
1408                $href .= "#".esc_param($params{-anchor});
1409        }
1410
1411        return $href;
1412}
1413
1414
1415## ======================================================================
1416## validation, quoting/unquoting and escaping
1417
1418sub validate_action {
1419        my $input = shift || return undef;
1420        return undef unless exists $actions{$input};
1421        return $input;
1422}
1423
1424sub validate_project {
1425        my $input = shift || return undef;
1426        if (!validate_pathname($input) ||
1427                !(-d "$projectroot/$input") ||
1428                !check_export_ok("$projectroot/$input") ||
1429                ($strict_export && !project_in_list($input))) {
1430                return undef;
1431        } else {
1432                return $input;
1433        }
1434}
1435
1436sub validate_pathname {
1437        my $input = shift || return undef;
1438
1439        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1440        # at the beginning, at the end, and between slashes.
1441        # also this catches doubled slashes
1442        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1443                return undef;
1444        }
1445        # no null characters
1446        if ($input =~ m!\0!) {
1447                return undef;
1448        }
1449        return $input;
1450}
1451
1452sub validate_refname {
1453        my $input = shift || return undef;
1454
1455        # textual hashes are O.K.
1456        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1457                return $input;
1458        }
1459        # it must be correct pathname
1460        $input = validate_pathname($input)
1461                or return undef;
1462        # restrictions on ref name according to git-check-ref-format
1463        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1464                return undef;
1465        }
1466        return $input;
1467}
1468
1469# decode sequences of octets in utf8 into Perl's internal form,
1470# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1471# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1472sub to_utf8 {
1473        my $str = shift;
1474        return undef unless defined $str;
1475
1476        if (utf8::is_utf8($str) || utf8::decode($str)) {
1477                return $str;
1478        } else {
1479                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1480        }
1481}
1482
1483# quote unsafe chars, but keep the slash, even when it's not
1484# correct, but quoted slashes look too horrible in bookmarks
1485sub esc_param {
1486        my $str = shift;
1487        return undef unless defined $str;
1488        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1489        $str =~ s/ /\+/g;
1490        return $str;
1491}
1492
1493# the quoting rules for path_info fragment are slightly different
1494sub esc_path_info {
1495        my $str = shift;
1496        return undef unless defined $str;
1497
1498        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1499        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1500
1501        return $str;
1502}
1503
1504# quote unsafe chars in whole URL, so some characters cannot be quoted
1505sub esc_url {
1506        my $str = shift;
1507        return undef unless defined $str;
1508        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1509        $str =~ s/ /\+/g;
1510        return $str;
1511}
1512
1513# quote unsafe characters in HTML attributes
1514sub esc_attr {
1515
1516        # for XHTML conformance escaping '"' to '&quot;' is not enough
1517        return esc_html(@_);
1518}
1519
1520# replace invalid utf8 character with SUBSTITUTION sequence
1521sub esc_html {
1522        my $str = shift;
1523        my %opts = @_;
1524
1525        return undef unless defined $str;
1526
1527        $str = to_utf8($str);
1528        $str = $cgi->escapeHTML($str);
1529        if ($opts{'-nbsp'}) {
1530                $str =~ s/ /&nbsp;/g;
1531        }
1532        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1533        return $str;
1534}
1535
1536# quote control characters and escape filename to HTML
1537sub esc_path {
1538        my $str = shift;
1539        my %opts = @_;
1540
1541        return undef unless defined $str;
1542
1543        $str = to_utf8($str);
1544        $str = $cgi->escapeHTML($str);
1545        if ($opts{'-nbsp'}) {
1546                $str =~ s/ /&nbsp;/g;
1547        }
1548        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1549        return $str;
1550}
1551
1552# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1553sub sanitize {
1554        my $str = shift;
1555
1556        return undef unless defined $str;
1557
1558        $str = to_utf8($str);
1559        $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1560        return $str;
1561}
1562
1563# Make control characters "printable", using character escape codes (CEC)
1564sub quot_cec {
1565        my $cntrl = shift;
1566        my %opts = @_;
1567        my %es = ( # character escape codes, aka escape sequences
1568                "\t" => '\t',   # tab            (HT)
1569                "\n" => '\n',   # line feed      (LF)
1570                "\r" => '\r',   # carrige return (CR)
1571                "\f" => '\f',   # form feed      (FF)
1572                "\b" => '\b',   # backspace      (BS)
1573                "\a" => '\a',   # alarm (bell)   (BEL)
1574                "\e" => '\e',   # escape         (ESC)
1575                "\013" => '\v', # vertical tab   (VT)
1576                "\000" => '\0', # nul character  (NUL)
1577        );
1578        my $chr = ( (exists $es{$cntrl})
1579                    ? $es{$cntrl}
1580                    : sprintf('\%2x', ord($cntrl)) );
1581        if ($opts{-nohtml}) {
1582                return $chr;
1583        } else {
1584                return "<span class=\"cntrl\">$chr</span>";
1585        }
1586}
1587
1588# Alternatively use unicode control pictures codepoints,
1589# Unicode "printable representation" (PR)
1590sub quot_upr {
1591        my $cntrl = shift;
1592        my %opts = @_;
1593
1594        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1595        if ($opts{-nohtml}) {
1596                return $chr;
1597        } else {
1598                return "<span class=\"cntrl\">$chr</span>";
1599        }
1600}
1601
1602# git may return quoted and escaped filenames
1603sub unquote {
1604        my $str = shift;
1605
1606        sub unq {
1607                my $seq = shift;
1608                my %es = ( # character escape codes, aka escape sequences
1609                        't' => "\t",   # tab            (HT, TAB)
1610                        'n' => "\n",   # newline        (NL)
1611                        'r' => "\r",   # return         (CR)
1612                        'f' => "\f",   # form feed      (FF)
1613                        'b' => "\b",   # backspace      (BS)
1614                        'a' => "\a",   # alarm (bell)   (BEL)
1615                        'e' => "\e",   # escape         (ESC)
1616                        'v' => "\013", # vertical tab   (VT)
1617                );
1618
1619                if ($seq =~ m/^[0-7]{1,3}$/) {
1620                        # octal char sequence
1621                        return chr(oct($seq));
1622                } elsif (exists $es{$seq}) {
1623                        # C escape sequence, aka character escape code
1624                        return $es{$seq};
1625                }
1626                # quoted ordinary character
1627                return $seq;
1628        }
1629
1630        if ($str =~ m/^"(.*)"$/) {
1631                # needs unquoting
1632                $str = $1;
1633                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1634        }
1635        return $str;
1636}
1637
1638# escape tabs (convert tabs to spaces)
1639sub untabify {
1640        my $line = shift;
1641
1642        while ((my $pos = index($line, "\t")) != -1) {
1643                if (my $count = (8 - ($pos % 8))) {
1644                        my $spaces = ' ' x $count;
1645                        $line =~ s/\t/$spaces/;
1646                }
1647        }
1648
1649        return $line;
1650}
1651
1652sub project_in_list {
1653        my $project = shift;
1654        my @list = git_get_projects_list();
1655        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1656}
1657
1658## ----------------------------------------------------------------------
1659## HTML aware string manipulation
1660
1661# Try to chop given string on a word boundary between position
1662# $len and $len+$add_len. If there is no word boundary there,
1663# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1664# (marking chopped part) would be longer than given string.
1665sub chop_str {
1666        my $str = shift;
1667        my $len = shift;
1668        my $add_len = shift || 10;
1669        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1670
1671        # Make sure perl knows it is utf8 encoded so we don't
1672        # cut in the middle of a utf8 multibyte char.
1673        $str = to_utf8($str);
1674
1675        # allow only $len chars, but don't cut a word if it would fit in $add_len
1676        # if it doesn't fit, cut it if it's still longer than the dots we would add
1677        # remove chopped character entities entirely
1678
1679        # when chopping in the middle, distribute $len into left and right part
1680        # return early if chopping wouldn't make string shorter
1681        if ($where eq 'center') {
1682                return $str if ($len + 5 >= length($str)); # filler is length 5
1683                $len = int($len/2);
1684        } else {
1685                return $str if ($len + 4 >= length($str)); # filler is length 4
1686        }
1687
1688        # regexps: ending and beginning with word part up to $add_len
1689        my $endre = qr/.{$len}\w{0,$add_len}/;
1690        my $begre = qr/\w{0,$add_len}.{$len}/;
1691
1692        if ($where eq 'left') {
1693                $str =~ m/^(.*?)($begre)$/;
1694                my ($lead, $body) = ($1, $2);
1695                if (length($lead) > 4) {
1696                        $lead = " ...";
1697                }
1698                return "$lead$body";
1699
1700        } elsif ($where eq 'center') {
1701                $str =~ m/^($endre)(.*)$/;
1702                my ($left, $str)  = ($1, $2);
1703                $str =~ m/^(.*?)($begre)$/;
1704                my ($mid, $right) = ($1, $2);
1705                if (length($mid) > 5) {
1706                        $mid = " ... ";
1707                }
1708                return "$left$mid$right";
1709
1710        } else {
1711                $str =~ m/^($endre)(.*)$/;
1712                my $body = $1;
1713                my $tail = $2;
1714                if (length($tail) > 4) {
1715                        $tail = "... ";
1716                }
1717                return "$body$tail";
1718        }
1719}
1720
1721# takes the same arguments as chop_str, but also wraps a <span> around the
1722# result with a title attribute if it does get chopped. Additionally, the
1723# string is HTML-escaped.
1724sub chop_and_escape_str {
1725        my ($str) = @_;
1726
1727        my $chopped = chop_str(@_);
1728        $str = to_utf8($str);
1729        if ($chopped eq $str) {
1730                return esc_html($chopped);
1731        } else {
1732                $str =~ s/[[:cntrl:]]/?/g;
1733                return $cgi->span({-title=>$str}, esc_html($chopped));
1734        }
1735}
1736
1737# Highlight selected fragments of string, using given CSS class,
1738# and escape HTML.  It is assumed that fragments do not overlap.
1739# Regions are passed as list of pairs (array references).
1740#
1741# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1742# '<span class="mark">foo</span>bar'
1743sub esc_html_hl_regions {
1744        my ($str, $css_class, @sel) = @_;
1745        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1746        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1747        return esc_html($str, %opts) unless @sel;
1748
1749        my $out = '';
1750        my $pos = 0;
1751
1752        for my $s (@sel) {
1753                my ($begin, $end) = @$s;
1754
1755                # Don't create empty <span> elements.
1756                next if $end <= $begin;
1757
1758                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1759                                       %opts);
1760
1761                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1762                        if ($begin - $pos > 0);
1763                $out .= $cgi->span({-class => $css_class}, $escaped);
1764
1765                $pos = $end;
1766        }
1767        $out .= esc_html(substr($str, $pos), %opts)
1768                if ($pos < length($str));
1769
1770        return $out;
1771}
1772
1773# return positions of beginning and end of each match
1774sub matchpos_list {
1775        my ($str, $regexp) = @_;
1776        return unless (defined $str && defined $regexp);
1777
1778        my @matches;
1779        while ($str =~ /$regexp/g) {
1780                push @matches, [$-[0], $+[0]];
1781        }
1782        return @matches;
1783}
1784
1785# highlight match (if any), and escape HTML
1786sub esc_html_match_hl {
1787        my ($str, $regexp) = @_;
1788        return esc_html($str) unless defined $regexp;
1789
1790        my @matches = matchpos_list($str, $regexp);
1791        return esc_html($str) unless @matches;
1792
1793        return esc_html_hl_regions($str, 'match', @matches);
1794}
1795
1796
1797# highlight match (if any) of shortened string, and escape HTML
1798sub esc_html_match_hl_chopped {
1799        my ($str, $chopped, $regexp) = @_;
1800        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1801
1802        my @matches = matchpos_list($str, $regexp);
1803        return esc_html($chopped) unless @matches;
1804
1805        # filter matches so that we mark chopped string
1806        my $tail = "... "; # see chop_str
1807        unless ($chopped =~ s/\Q$tail\E$//) {
1808                $tail = '';
1809        }
1810        my $chop_len = length($chopped);
1811        my $tail_len = length($tail);
1812        my @filtered;
1813
1814        for my $m (@matches) {
1815                if ($m->[0] > $chop_len) {
1816                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1817                        last;
1818                } elsif ($m->[1] > $chop_len) {
1819                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1820                        last;
1821                }
1822                push @filtered, $m;
1823        }
1824
1825        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1826}
1827
1828## ----------------------------------------------------------------------
1829## functions returning short strings
1830
1831# CSS class for given age value (in seconds)
1832sub age_class {
1833        my $age = shift;
1834
1835        if (!defined $age) {
1836                return "noage";
1837        } elsif ($age < 60*60*2) {
1838                return "age0";
1839        } elsif ($age < 60*60*24*2) {
1840                return "age1";
1841        } else {
1842                return "age2";
1843        }
1844}
1845
1846# convert age in seconds to "nn units ago" string
1847sub age_string {
1848        my $age = shift;
1849        my $age_str;
1850
1851        if ($age > 60*60*24*365*2) {
1852                $age_str = (int $age/60/60/24/365);
1853                $age_str .= " years ago";
1854        } elsif ($age > 60*60*24*(365/12)*2) {
1855                $age_str = int $age/60/60/24/(365/12);
1856                $age_str .= " months ago";
1857        } elsif ($age > 60*60*24*7*2) {
1858                $age_str = int $age/60/60/24/7;
1859                $age_str .= " weeks ago";
1860        } elsif ($age > 60*60*24*2) {
1861                $age_str = int $age/60/60/24;
1862                $age_str .= " days ago";
1863        } elsif ($age > 60*60*2) {
1864                $age_str = int $age/60/60;
1865                $age_str .= " hours ago";
1866        } elsif ($age > 60*2) {
1867                $age_str = int $age/60;
1868                $age_str .= " min ago";
1869        } elsif ($age > 2) {
1870                $age_str = int $age;
1871                $age_str .= " sec ago";
1872        } else {
1873                $age_str .= " right now";
1874        }
1875        return $age_str;
1876}
1877
1878use constant {
1879        S_IFINVALID => 0030000,
1880        S_IFGITLINK => 0160000,
1881};
1882
1883# submodule/subproject, a commit object reference
1884sub S_ISGITLINK {
1885        my $mode = shift;
1886
1887        return (($mode & S_IFMT) == S_IFGITLINK)
1888}
1889
1890# convert file mode in octal to symbolic file mode string
1891sub mode_str {
1892        my $mode = oct shift;
1893
1894        if (S_ISGITLINK($mode)) {
1895                return 'm---------';
1896        } elsif (S_ISDIR($mode & S_IFMT)) {
1897                return 'drwxr-xr-x';
1898        } elsif (S_ISLNK($mode)) {
1899                return 'lrwxrwxrwx';
1900        } elsif (S_ISREG($mode)) {
1901                # git cares only about the executable bit
1902                if ($mode & S_IXUSR) {
1903                        return '-rwxr-xr-x';
1904                } else {
1905                        return '-rw-r--r--';
1906                };
1907        } else {
1908                return '----------';
1909        }
1910}
1911
1912# convert file mode in octal to file type string
1913sub file_type {
1914        my $mode = shift;
1915
1916        if ($mode !~ m/^[0-7]+$/) {
1917                return $mode;
1918        } else {
1919                $mode = oct $mode;
1920        }
1921
1922        if (S_ISGITLINK($mode)) {
1923                return "submodule";
1924        } elsif (S_ISDIR($mode & S_IFMT)) {
1925                return "directory";
1926        } elsif (S_ISLNK($mode)) {
1927                return "symlink";
1928        } elsif (S_ISREG($mode)) {
1929                return "file";
1930        } else {
1931                return "unknown";
1932        }
1933}
1934
1935# convert file mode in octal to file type description string
1936sub file_type_long {
1937        my $mode = shift;
1938
1939        if ($mode !~ m/^[0-7]+$/) {
1940                return $mode;
1941        } else {
1942                $mode = oct $mode;
1943        }
1944
1945        if (S_ISGITLINK($mode)) {
1946                return "submodule";
1947        } elsif (S_ISDIR($mode & S_IFMT)) {
1948                return "directory";
1949        } elsif (S_ISLNK($mode)) {
1950                return "symlink";
1951        } elsif (S_ISREG($mode)) {
1952                if ($mode & S_IXUSR) {
1953                        return "executable";
1954                } else {
1955                        return "file";
1956                };
1957        } else {
1958                return "unknown";
1959        }
1960}
1961
1962
1963## ----------------------------------------------------------------------
1964## functions returning short HTML fragments, or transforming HTML fragments
1965## which don't belong to other sections
1966
1967# format line of commit message.
1968sub format_log_line_html {
1969        my $line = shift;
1970
1971        $line = esc_html($line, -nbsp=>1);
1972        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1973                $cgi->a({-href => href(action=>"object", hash=>$1),
1974                                        -class => "text"}, $1);
1975        }eg;
1976
1977        return $line;
1978}
1979
1980# format marker of refs pointing to given object
1981
1982# the destination action is chosen based on object type and current context:
1983# - for annotated tags, we choose the tag view unless it's the current view
1984#   already, in which case we go to shortlog view
1985# - for other refs, we keep the current view if we're in history, shortlog or
1986#   log view, and select shortlog otherwise
1987sub format_ref_marker {
1988        my ($refs, $id) = @_;
1989        my $markers = '';
1990
1991        if (defined $refs->{$id}) {
1992                foreach my $ref (@{$refs->{$id}}) {
1993                        # this code exploits the fact that non-lightweight tags are the
1994                        # only indirect objects, and that they are the only objects for which
1995                        # we want to use tag instead of shortlog as action
1996                        my ($type, $name) = qw();
1997                        my $indirect = ($ref =~ s/\^\{\}$//);
1998                        # e.g. tags/v2.6.11 or heads/next
1999                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
2000                                $type = $1;
2001                                $name = $2;
2002                        } else {
2003                                $type = "ref";
2004                                $name = $ref;
2005                        }
2006
2007                        my $class = $type;
2008                        $class .= " indirect" if $indirect;
2009
2010                        my $dest_action = "shortlog";
2011
2012                        if ($indirect) {
2013                                $dest_action = "tag" unless $action eq "tag";
2014                        } elsif ($action =~ /^(history|(short)?log)$/) {
2015                                $dest_action = $action;
2016                        }
2017
2018                        my $dest = "";
2019                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2020                        $dest .= $ref;
2021
2022                        my $link = $cgi->a({
2023                                -href => href(
2024                                        action=>$dest_action,
2025                                        hash=>$dest
2026                                )}, $name);
2027
2028                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2029                                $link . "</span>";
2030                }
2031        }
2032
2033        if ($markers) {
2034                return ' <span class="refs">'. $markers . '</span>';
2035        } else {
2036                return "";
2037        }
2038}
2039
2040# format, perhaps shortened and with markers, title line
2041sub format_subject_html {
2042        my ($long, $short, $href, $extra) = @_;
2043        $extra = '' unless defined($extra);
2044
2045        if (length($short) < length($long)) {
2046                $long =~ s/[[:cntrl:]]/?/g;
2047                return $cgi->a({-href => $href, -class => "list subject",
2048                                -title => to_utf8($long)},
2049                       esc_html($short)) . $extra;
2050        } else {
2051                return $cgi->a({-href => $href, -class => "list subject"},
2052                       esc_html($long)) . $extra;
2053        }
2054}
2055
2056# Rather than recomputing the url for an email multiple times, we cache it
2057# after the first hit. This gives a visible benefit in views where the avatar
2058# for the same email is used repeatedly (e.g. shortlog).
2059# The cache is shared by all avatar engines (currently gravatar only), which
2060# are free to use it as preferred. Since only one avatar engine is used for any
2061# given page, there's no risk for cache conflicts.
2062our %avatar_cache = ();
2063
2064# Compute the picon url for a given email, by using the picon search service over at
2065# http://www.cs.indiana.edu/picons/search.html
2066sub picon_url {
2067        my $email = lc shift;
2068        if (!$avatar_cache{$email}) {
2069                my ($user, $domain) = split('@', $email);
2070                $avatar_cache{$email} =
2071                        "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2072                        "$domain/$user/" .
2073                        "users+domains+unknown/up/single";
2074        }
2075        return $avatar_cache{$email};
2076}
2077
2078# Compute the gravatar url for a given email, if it's not in the cache already.
2079# Gravatar stores only the part of the URL before the size, since that's the
2080# one computationally more expensive. This also allows reuse of the cache for
2081# different sizes (for this particular engine).
2082sub gravatar_url {
2083        my $email = lc shift;
2084        my $size = shift;
2085        $avatar_cache{$email} ||=
2086                "http://www.gravatar.com/avatar/" .
2087                        Digest::MD5::md5_hex($email) . "?s=";
2088        return $avatar_cache{$email} . $size;
2089}
2090
2091# Insert an avatar for the given $email at the given $size if the feature
2092# is enabled.
2093sub git_get_avatar {
2094        my ($email, %opts) = @_;
2095        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2096        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2097        $opts{-size} ||= 'default';
2098        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2099        my $url = "";
2100        if ($git_avatar eq 'gravatar') {
2101                $url = gravatar_url($email, $size);
2102        } elsif ($git_avatar eq 'picon') {
2103                $url = picon_url($email);
2104        }
2105        # Other providers can be added by extending the if chain, defining $url
2106        # as needed. If no variant puts something in $url, we assume avatars
2107        # are completely disabled/unavailable.
2108        if ($url) {
2109                return $pre_white .
2110                       "<img width=\"$size\" " .
2111                            "class=\"avatar\" " .
2112                            "src=\"".esc_url($url)."\" " .
2113                            "alt=\"\" " .
2114                       "/>" . $post_white;
2115        } else {
2116                return "";
2117        }
2118}
2119
2120sub format_search_author {
2121        my ($author, $searchtype, $displaytext) = @_;
2122        my $have_search = gitweb_check_feature('search');
2123
2124        if ($have_search) {
2125                my $performed = "";
2126                if ($searchtype eq 'author') {
2127                        $performed = "authored";
2128                } elsif ($searchtype eq 'committer') {
2129                        $performed = "committed";
2130                }
2131
2132                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2133                                searchtext=>$author,
2134                                searchtype=>$searchtype), class=>"list",
2135                                title=>"Search for commits $performed by $author"},
2136                                $displaytext);
2137
2138        } else {
2139                return $displaytext;
2140        }
2141}
2142
2143# format the author name of the given commit with the given tag
2144# the author name is chopped and escaped according to the other
2145# optional parameters (see chop_str).
2146sub format_author_html {
2147        my $tag = shift;
2148        my $co = shift;
2149        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2150        return "<$tag class=\"author\">" .
2151               format_search_author($co->{'author_name'}, "author",
2152                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2153                       $author) .
2154               "</$tag>";
2155}
2156
2157# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2158sub format_git_diff_header_line {
2159        my $line = shift;
2160        my $diffinfo = shift;
2161        my ($from, $to) = @_;
2162
2163        if ($diffinfo->{'nparents'}) {
2164                # combined diff
2165                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2166                if ($to->{'href'}) {
2167                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2168                                         esc_path($to->{'file'}));
2169                } else { # file was deleted (no href)
2170                        $line .= esc_path($to->{'file'});
2171                }
2172        } else {
2173                # "ordinary" diff
2174                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2175                if ($from->{'href'}) {
2176                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2177                                         'a/' . esc_path($from->{'file'}));
2178                } else { # file was added (no href)
2179                        $line .= 'a/' . esc_path($from->{'file'});
2180                }
2181                $line .= ' ';
2182                if ($to->{'href'}) {
2183                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2184                                         'b/' . esc_path($to->{'file'}));
2185                } else { # file was deleted
2186                        $line .= 'b/' . esc_path($to->{'file'});
2187                }
2188        }
2189
2190        return "<div class=\"diff header\">$line</div>\n";
2191}
2192
2193# format extended diff header line, before patch itself
2194sub format_extended_diff_header_line {
2195        my $line = shift;
2196        my $diffinfo = shift;
2197        my ($from, $to) = @_;
2198
2199        # match <path>
2200        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2201                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2202                                       esc_path($from->{'file'}));
2203        }
2204        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2205                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2206                                 esc_path($to->{'file'}));
2207        }
2208        # match single <mode>
2209        if ($line =~ m/\s(\d{6})$/) {
2210                $line .= '<span class="info"> (' .
2211                         file_type_long($1) .
2212                         ')</span>';
2213        }
2214        # match <hash>
2215        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2216                # can match only for combined diff
2217                $line = 'index ';
2218                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2219                        if ($from->{'href'}[$i]) {
2220                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2221                                                  -class=>"hash"},
2222                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2223                        } else {
2224                                $line .= '0' x 7;
2225                        }
2226                        # separator
2227                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2228                }
2229                $line .= '..';
2230                if ($to->{'href'}) {
2231                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2232                                         substr($diffinfo->{'to_id'},0,7));
2233                } else {
2234                        $line .= '0' x 7;
2235                }
2236
2237        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2238                # can match only for ordinary diff
2239                my ($from_link, $to_link);
2240                if ($from->{'href'}) {
2241                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2242                                             substr($diffinfo->{'from_id'},0,7));
2243                } else {
2244                        $from_link = '0' x 7;
2245                }
2246                if ($to->{'href'}) {
2247                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2248                                           substr($diffinfo->{'to_id'},0,7));
2249                } else {
2250                        $to_link = '0' x 7;
2251                }
2252                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2253                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2254        }
2255
2256        return $line . "<br/>\n";
2257}
2258
2259# format from-file/to-file diff header
2260sub format_diff_from_to_header {
2261        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2262        my $line;
2263        my $result = '';
2264
2265        $line = $from_line;
2266        #assert($line =~ m/^---/) if DEBUG;
2267        # no extra formatting for "^--- /dev/null"
2268        if (! $diffinfo->{'nparents'}) {
2269                # ordinary (single parent) diff
2270                if ($line =~ m!^--- "?a/!) {
2271                        if ($from->{'href'}) {
2272                                $line = '--- a/' .
2273                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2274                                                esc_path($from->{'file'}));
2275                        } else {
2276                                $line = '--- a/' .
2277                                        esc_path($from->{'file'});
2278                        }
2279                }
2280                $result .= qq!<div class="diff from_file">$line</div>\n!;
2281
2282        } else {
2283                # combined diff (merge commit)
2284                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2285                        if ($from->{'href'}[$i]) {
2286                                $line = '--- ' .
2287                                        $cgi->a({-href=>href(action=>"blobdiff",
2288                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2289                                                             hash_parent_base=>$parents[$i],
2290                                                             file_parent=>$from->{'file'}[$i],
2291                                                             hash=>$diffinfo->{'to_id'},
2292                                                             hash_base=>$hash,
2293                                                             file_name=>$to->{'file'}),
2294                                                 -class=>"path",
2295                                                 -title=>"diff" . ($i+1)},
2296                                                $i+1) .
2297                                        '/' .
2298                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2299                                                esc_path($from->{'file'}[$i]));
2300                        } else {
2301                                $line = '--- /dev/null';
2302                        }
2303                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2304                }
2305        }
2306
2307        $line = $to_line;
2308        #assert($line =~ m/^\+\+\+/) if DEBUG;
2309        # no extra formatting for "^+++ /dev/null"
2310        if ($line =~ m!^\+\+\+ "?b/!) {
2311                if ($to->{'href'}) {
2312                        $line = '+++ b/' .
2313                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2314                                        esc_path($to->{'file'}));
2315                } else {
2316                        $line = '+++ b/' .
2317                                esc_path($to->{'file'});
2318                }
2319        }
2320        $result .= qq!<div class="diff to_file">$line</div>\n!;
2321
2322        return $result;
2323}
2324
2325# create note for patch simplified by combined diff
2326sub format_diff_cc_simplified {
2327        my ($diffinfo, @parents) = @_;
2328        my $result = '';
2329
2330        $result .= "<div class=\"diff header\">" .
2331                   "diff --cc ";
2332        if (!is_deleted($diffinfo)) {
2333                $result .= $cgi->a({-href => href(action=>"blob",
2334                                                  hash_base=>$hash,
2335                                                  hash=>$diffinfo->{'to_id'},
2336                                                  file_name=>$diffinfo->{'to_file'}),
2337                                    -class => "path"},
2338                                   esc_path($diffinfo->{'to_file'}));
2339        } else {
2340                $result .= esc_path($diffinfo->{'to_file'});
2341        }
2342        $result .= "</div>\n" . # class="diff header"
2343                   "<div class=\"diff nodifferences\">" .
2344                   "Simple merge" .
2345                   "</div>\n"; # class="diff nodifferences"
2346
2347        return $result;
2348}
2349
2350sub diff_line_class {
2351        my ($line, $from, $to) = @_;
2352
2353        # ordinary diff
2354        my $num_sign = 1;
2355        # combined diff
2356        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2357                $num_sign = scalar @{$from->{'href'}};
2358        }
2359
2360        my @diff_line_classifier = (
2361                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2362                { regexp => qr/^\\/,               class => "incomplete"  },
2363                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2364                # classifier for context must come before classifier add/rem,
2365                # or we would have to use more complicated regexp, for example
2366                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2367                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2368                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2369        );
2370        for my $clsfy (@diff_line_classifier) {
2371                return $clsfy->{'class'}
2372                        if ($line =~ $clsfy->{'regexp'});
2373        }
2374
2375        # fallback
2376        return "";
2377}
2378
2379# assumes that $from and $to are defined and correctly filled,
2380# and that $line holds a line of chunk header for unified diff
2381sub format_unidiff_chunk_header {
2382        my ($line, $from, $to) = @_;
2383
2384        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2385                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2386
2387        $from_lines = 0 unless defined $from_lines;
2388        $to_lines   = 0 unless defined $to_lines;
2389
2390        if ($from->{'href'}) {
2391                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2392                                     -class=>"list"}, $from_text);
2393        }
2394        if ($to->{'href'}) {
2395                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2396                                     -class=>"list"}, $to_text);
2397        }
2398        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2399                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2400        return $line;
2401}
2402
2403# assumes that $from and $to are defined and correctly filled,
2404# and that $line holds a line of chunk header for combined diff
2405sub format_cc_diff_chunk_header {
2406        my ($line, $from, $to) = @_;
2407
2408        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2409        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2410
2411        @from_text = split(' ', $ranges);
2412        for (my $i = 0; $i < @from_text; ++$i) {
2413                ($from_start[$i], $from_nlines[$i]) =
2414                        (split(',', substr($from_text[$i], 1)), 0);
2415        }
2416
2417        $to_text   = pop @from_text;
2418        $to_start  = pop @from_start;
2419        $to_nlines = pop @from_nlines;
2420
2421        $line = "<span class=\"chunk_info\">$prefix ";
2422        for (my $i = 0; $i < @from_text; ++$i) {
2423                if ($from->{'href'}[$i]) {
2424                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2425                                          -class=>"list"}, $from_text[$i]);
2426                } else {
2427                        $line .= $from_text[$i];
2428                }
2429                $line .= " ";
2430        }
2431        if ($to->{'href'}) {
2432                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2433                                  -class=>"list"}, $to_text);
2434        } else {
2435                $line .= $to_text;
2436        }
2437        $line .= " $prefix</span>" .
2438                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2439        return $line;
2440}
2441
2442# process patch (diff) line (not to be used for diff headers),
2443# returning HTML-formatted (but not wrapped) line.
2444# If the line is passed as a reference, it is treated as HTML and not
2445# esc_html()'ed.
2446sub format_diff_line {
2447        my ($line, $diff_class, $from, $to) = @_;
2448
2449        if (ref($line)) {
2450                $line = $$line;
2451        } else {
2452                chomp $line;
2453                $line = untabify($line);
2454
2455                if ($from && $to && $line =~ m/^\@{2} /) {
2456                        $line = format_unidiff_chunk_header($line, $from, $to);
2457                } elsif ($from && $to && $line =~ m/^\@{3}/) {
2458                        $line = format_cc_diff_chunk_header($line, $from, $to);
2459                } else {
2460                        $line = esc_html($line, -nbsp=>1);
2461                }
2462        }
2463
2464        my $diff_classes = "diff";
2465        $diff_classes .= " $diff_class" if ($diff_class);
2466        $line = "<div class=\"$diff_classes\">$line</div>\n";
2467
2468        return $line;
2469}
2470
2471# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2472# linked.  Pass the hash of the tree/commit to snapshot.
2473sub format_snapshot_links {
2474        my ($hash) = @_;
2475        my $num_fmts = @snapshot_fmts;
2476        if ($num_fmts > 1) {
2477                # A parenthesized list of links bearing format names.
2478                # e.g. "snapshot (_tar.gz_ _zip_)"
2479                return "snapshot (" . join(' ', map
2480                        $cgi->a({
2481                                -href => href(
2482                                        action=>"snapshot",
2483                                        hash=>$hash,
2484                                        snapshot_format=>$_
2485                                )
2486                        }, $known_snapshot_formats{$_}{'display'})
2487                , @snapshot_fmts) . ")";
2488        } elsif ($num_fmts == 1) {
2489                # A single "snapshot" link whose tooltip bears the format name.
2490                # i.e. "_snapshot_"
2491                my ($fmt) = @snapshot_fmts;
2492                return
2493                        $cgi->a({
2494                                -href => href(
2495                                        action=>"snapshot",
2496                                        hash=>$hash,
2497                                        snapshot_format=>$fmt
2498                                ),
2499                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2500                        }, "snapshot");
2501        } else { # $num_fmts == 0
2502                return undef;
2503        }
2504}
2505
2506## ......................................................................
2507## functions returning values to be passed, perhaps after some
2508## transformation, to other functions; e.g. returning arguments to href()
2509
2510# returns hash to be passed to href to generate gitweb URL
2511# in -title key it returns description of link
2512sub get_feed_info {
2513        my $format = shift || 'Atom';
2514        my %res = (action => lc($format));
2515
2516        # feed links are possible only for project views
2517        return unless (defined $project);
2518        # some views should link to OPML, or to generic project feed,
2519        # or don't have specific feed yet (so they should use generic)
2520        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2521
2522        my $branch;
2523        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2524        # from tag links; this also makes possible to detect branch links
2525        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2526            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2527                $branch = $1;
2528        }
2529        # find log type for feed description (title)
2530        my $type = 'log';
2531        if (defined $file_name) {
2532                $type  = "history of $file_name";
2533                $type .= "/" if ($action eq 'tree');
2534                $type .= " on '$branch'" if (defined $branch);
2535        } else {
2536                $type = "log of $branch" if (defined $branch);
2537        }
2538
2539        $res{-title} = $type;
2540        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2541        $res{'file_name'} = $file_name;
2542
2543        return %res;
2544}
2545
2546## ----------------------------------------------------------------------
2547## git utility subroutines, invoking git commands
2548
2549# returns path to the core git executable and the --git-dir parameter as list
2550sub git_cmd {
2551        $number_of_git_cmds++;
2552        return $GIT, '--git-dir='.$git_dir;
2553}
2554
2555# quote the given arguments for passing them to the shell
2556# quote_command("command", "arg 1", "arg with ' and ! characters")
2557# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2558# Try to avoid using this function wherever possible.
2559sub quote_command {
2560        return join(' ',
2561                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2562}
2563
2564# get HEAD ref of given project as hash
2565sub git_get_head_hash {
2566        return git_get_full_hash(shift, 'HEAD');
2567}
2568
2569sub git_get_full_hash {
2570        return git_get_hash(@_);
2571}
2572
2573sub git_get_short_hash {
2574        return git_get_hash(@_, '--short=7');
2575}
2576
2577sub git_get_hash {
2578        my ($project, $hash, @options) = @_;
2579        my $o_git_dir = $git_dir;
2580        my $retval = undef;
2581        $git_dir = "$projectroot/$project";
2582        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2583            '--verify', '-q', @options, $hash) {
2584                $retval = <$fd>;
2585                chomp $retval if defined $retval;
2586                close $fd;
2587        }
2588        if (defined $o_git_dir) {
2589                $git_dir = $o_git_dir;
2590        }
2591        return $retval;
2592}
2593
2594# get type of given object
2595sub git_get_type {
2596        my $hash = shift;
2597
2598        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2599        my $type = <$fd>;
2600        close $fd or return;
2601        chomp $type;
2602        return $type;
2603}
2604
2605# repository configuration
2606our $config_file = '';
2607our %config;
2608
2609# store multiple values for single key as anonymous array reference
2610# single values stored directly in the hash, not as [ <value> ]
2611sub hash_set_multi {
2612        my ($hash, $key, $value) = @_;
2613
2614        if (!exists $hash->{$key}) {
2615                $hash->{$key} = $value;
2616        } elsif (!ref $hash->{$key}) {
2617                $hash->{$key} = [ $hash->{$key}, $value ];
2618        } else {
2619                push @{$hash->{$key}}, $value;
2620        }
2621}
2622
2623# return hash of git project configuration
2624# optionally limited to some section, e.g. 'gitweb'
2625sub git_parse_project_config {
2626        my $section_regexp = shift;
2627        my %config;
2628
2629        local $/ = "\0";
2630
2631        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2632                or return;
2633
2634        while (my $keyval = <$fh>) {
2635                chomp $keyval;
2636                my ($key, $value) = split(/\n/, $keyval, 2);
2637
2638                hash_set_multi(\%config, $key, $value)
2639                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2640        }
2641        close $fh;
2642
2643        return %config;
2644}
2645
2646# convert config value to boolean: 'true' or 'false'
2647# no value, number > 0, 'true' and 'yes' values are true
2648# rest of values are treated as false (never as error)
2649sub config_to_bool {
2650        my $val = shift;
2651
2652        return 1 if !defined $val;             # section.key
2653
2654        # strip leading and trailing whitespace
2655        $val =~ s/^\s+//;
2656        $val =~ s/\s+$//;
2657
2658        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2659                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2660}
2661
2662# convert config value to simple decimal number
2663# an optional value suffix of 'k', 'm', or 'g' will cause the value
2664# to be multiplied by 1024, 1048576, or 1073741824
2665sub config_to_int {
2666        my $val = shift;
2667
2668        # strip leading and trailing whitespace
2669        $val =~ s/^\s+//;
2670        $val =~ s/\s+$//;
2671
2672        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2673                $unit = lc($unit);
2674                # unknown unit is treated as 1
2675                return $num * ($unit eq 'g' ? 1073741824 :
2676                               $unit eq 'm' ?    1048576 :
2677                               $unit eq 'k' ?       1024 : 1);
2678        }
2679        return $val;
2680}
2681
2682# convert config value to array reference, if needed
2683sub config_to_multi {
2684        my $val = shift;
2685
2686        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2687}
2688
2689sub git_get_project_config {
2690        my ($key, $type) = @_;
2691
2692        return unless defined $git_dir;
2693
2694        # key sanity check
2695        return unless ($key);
2696        # only subsection, if exists, is case sensitive,
2697        # and not lowercased by 'git config -z -l'
2698        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2699                $key = join(".", lc($hi), $mi, lc($lo));
2700        } else {
2701                $key = lc($key);
2702        }
2703        $key =~ s/^gitweb\.//;
2704        return if ($key =~ m/\W/);
2705
2706        # type sanity check
2707        if (defined $type) {
2708                $type =~ s/^--//;
2709                $type = undef
2710                        unless ($type eq 'bool' || $type eq 'int');
2711        }
2712
2713        # get config
2714        if (!defined $config_file ||
2715            $config_file ne "$git_dir/config") {
2716                %config = git_parse_project_config('gitweb');
2717                $config_file = "$git_dir/config";
2718        }
2719
2720        # check if config variable (key) exists
2721        return unless exists $config{"gitweb.$key"};
2722
2723        # ensure given type
2724        if (!defined $type) {
2725                return $config{"gitweb.$key"};
2726        } elsif ($type eq 'bool') {
2727                # backward compatibility: 'git config --bool' returns true/false
2728                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2729        } elsif ($type eq 'int') {
2730                return config_to_int($config{"gitweb.$key"});
2731        }
2732        return $config{"gitweb.$key"};
2733}
2734
2735# get hash of given path at given ref
2736sub git_get_hash_by_path {
2737        my $base = shift;
2738        my $path = shift || return undef;
2739        my $type = shift;
2740
2741        $path =~ s,/+$,,;
2742
2743        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2744                or die_error(500, "Open git-ls-tree failed");
2745        my $line = <$fd>;
2746        close $fd or return undef;
2747
2748        if (!defined $line) {
2749                # there is no tree or hash given by $path at $base
2750                return undef;
2751        }
2752
2753        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2754        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2755        if (defined $type && $type ne $2) {
2756                # type doesn't match
2757                return undef;
2758        }
2759        return $3;
2760}
2761
2762# get path of entry with given hash at given tree-ish (ref)
2763# used to get 'from' filename for combined diff (merge commit) for renames
2764sub git_get_path_by_hash {
2765        my $base = shift || return;
2766        my $hash = shift || return;
2767
2768        local $/ = "\0";
2769
2770        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2771                or return undef;
2772        while (my $line = <$fd>) {
2773                chomp $line;
2774
2775                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2776                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2777                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2778                        close $fd;
2779                        return $1;
2780                }
2781        }
2782        close $fd;
2783        return undef;
2784}
2785
2786## ......................................................................
2787## git utility functions, directly accessing git repository
2788
2789# get the value of config variable either from file named as the variable
2790# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2791# configuration variable in the repository config file.
2792sub git_get_file_or_project_config {
2793        my ($path, $name) = @_;
2794
2795        $git_dir = "$projectroot/$path";
2796        open my $fd, '<', "$git_dir/$name"
2797                or return git_get_project_config($name);
2798        my $conf = <$fd>;
2799        close $fd;
2800        if (defined $conf) {
2801                chomp $conf;
2802        }
2803        return $conf;
2804}
2805
2806sub git_get_project_description {
2807        my $path = shift;
2808        return git_get_file_or_project_config($path, 'description');
2809}
2810
2811sub git_get_project_category {
2812        my $path = shift;
2813        return git_get_file_or_project_config($path, 'category');
2814}
2815
2816
2817# supported formats:
2818# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2819#   - if its contents is a number, use it as tag weight,
2820#   - otherwise add a tag with weight 1
2821# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2822#   the same value multiple times increases tag weight
2823# * `gitweb.ctag' multi-valued repo config variable
2824sub git_get_project_ctags {
2825        my $project = shift;
2826        my $ctags = {};
2827
2828        $git_dir = "$projectroot/$project";
2829        if (opendir my $dh, "$git_dir/ctags") {
2830                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2831                foreach my $tagfile (@files) {
2832                        open my $ct, '<', $tagfile
2833                                or next;
2834                        my $val = <$ct>;
2835                        chomp $val if $val;
2836                        close $ct;
2837
2838                        (my $ctag = $tagfile) =~ s#.*/##;
2839                        if ($val =~ /^\d+$/) {
2840                                $ctags->{$ctag} = $val;
2841                        } else {
2842                                $ctags->{$ctag} = 1;
2843                        }
2844                }
2845                closedir $dh;
2846
2847        } elsif (open my $fh, '<', "$git_dir/ctags") {
2848                while (my $line = <$fh>) {
2849                        chomp $line;
2850                        $ctags->{$line}++ if $line;
2851                }
2852                close $fh;
2853
2854        } else {
2855                my $taglist = config_to_multi(git_get_project_config('ctag'));
2856                foreach my $tag (@$taglist) {
2857                        $ctags->{$tag}++;
2858                }
2859        }
2860
2861        return $ctags;
2862}
2863
2864# return hash, where keys are content tags ('ctags'),
2865# and values are sum of weights of given tag in every project
2866sub git_gather_all_ctags {
2867        my $projects = shift;
2868        my $ctags = {};
2869
2870        foreach my $p (@$projects) {
2871                foreach my $ct (keys %{$p->{'ctags'}}) {
2872                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2873                }
2874        }
2875
2876        return $ctags;
2877}
2878
2879sub git_populate_project_tagcloud {
2880        my $ctags = shift;
2881
2882        # First, merge different-cased tags; tags vote on casing
2883        my %ctags_lc;
2884        foreach (keys %$ctags) {
2885                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2886                if (not $ctags_lc{lc $_}->{topcount}
2887                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2888                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2889                        $ctags_lc{lc $_}->{topname} = $_;
2890                }
2891        }
2892
2893        my $cloud;
2894        my $matched = $input_params{'ctag'};
2895        if (eval { require HTML::TagCloud; 1; }) {
2896                $cloud = HTML::TagCloud->new;
2897                foreach my $ctag (sort keys %ctags_lc) {
2898                        # Pad the title with spaces so that the cloud looks
2899                        # less crammed.
2900                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2901                        $title =~ s/ /&nbsp;/g;
2902                        $title =~ s/^/&nbsp;/g;
2903                        $title =~ s/$/&nbsp;/g;
2904                        if (defined $matched && $matched eq $ctag) {
2905                                $title = qq(<span class="match">$title</span>);
2906                        }
2907                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2908                                    $ctags_lc{$ctag}->{count});
2909                }
2910        } else {
2911                $cloud = {};
2912                foreach my $ctag (keys %ctags_lc) {
2913                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2914                        if (defined $matched && $matched eq $ctag) {
2915                                $title = qq(<span class="match">$title</span>);
2916                        }
2917                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2918                        $cloud->{$ctag}{ctag} =
2919                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2920                }
2921        }
2922        return $cloud;
2923}
2924
2925sub git_show_project_tagcloud {
2926        my ($cloud, $count) = @_;
2927        if (ref $cloud eq 'HTML::TagCloud') {
2928                return $cloud->html_and_css($count);
2929        } else {
2930                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2931                return
2932                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2933                        join (', ', map {
2934                                $cloud->{$_}->{'ctag'}
2935                        } splice(@tags, 0, $count)) .
2936                        '</div>';
2937        }
2938}
2939
2940sub git_get_project_url_list {
2941        my $path = shift;
2942
2943        $git_dir = "$projectroot/$path";
2944        open my $fd, '<', "$git_dir/cloneurl"
2945                or return wantarray ?
2946                @{ config_to_multi(git_get_project_config('url')) } :
2947                   config_to_multi(git_get_project_config('url'));
2948        my @git_project_url_list = map { chomp; $_ } <$fd>;
2949        close $fd;
2950
2951        return wantarray ? @git_project_url_list : \@git_project_url_list;
2952}
2953
2954sub git_get_projects_list {
2955        my $filter = shift || '';
2956        my $paranoid = shift;
2957        my @list;
2958
2959        if (-d $projects_list) {
2960                # search in directory
2961                my $dir = $projects_list;
2962                # remove the trailing "/"
2963                $dir =~ s!/+$!!;
2964                my $pfxlen = length("$dir");
2965                my $pfxdepth = ($dir =~ tr!/!!);
2966                # when filtering, search only given subdirectory
2967                if ($filter && !$paranoid) {
2968                        $dir .= "/$filter";
2969                        $dir =~ s!/+$!!;
2970                }
2971
2972                File::Find::find({
2973                        follow_fast => 1, # follow symbolic links
2974                        follow_skip => 2, # ignore duplicates
2975                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2976                        wanted => sub {
2977                                # global variables
2978                                our $project_maxdepth;
2979                                our $projectroot;
2980                                # skip project-list toplevel, if we get it.
2981                                return if (m!^[/.]$!);
2982                                # only directories can be git repositories
2983                                return unless (-d $_);
2984                                # don't traverse too deep (Find is super slow on os x)
2985                                # $project_maxdepth excludes depth of $projectroot
2986                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2987                                        $File::Find::prune = 1;
2988                                        return;
2989                                }
2990
2991                                my $path = substr($File::Find::name, $pfxlen + 1);
2992                                # paranoidly only filter here
2993                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2994                                        next;
2995                                }
2996                                # we check related file in $projectroot
2997                                if (check_export_ok("$projectroot/$path")) {
2998                                        push @list, { path => $path };
2999                                        $File::Find::prune = 1;
3000                                }
3001                        },
3002                }, "$dir");
3003
3004        } elsif (-f $projects_list) {
3005                # read from file(url-encoded):
3006                # 'git%2Fgit.git Linus+Torvalds'
3007                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3008                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3009                open my $fd, '<', $projects_list or return;
3010        PROJECT:
3011                while (my $line = <$fd>) {
3012                        chomp $line;
3013                        my ($path, $owner) = split ' ', $line;
3014                        $path = unescape($path);
3015                        $owner = unescape($owner);
3016                        if (!defined $path) {
3017                                next;
3018                        }
3019                        # if $filter is rpovided, check if $path begins with $filter
3020                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3021                                next;
3022                        }
3023                        if (check_export_ok("$projectroot/$path")) {
3024                                my $pr = {
3025                                        path => $path
3026                                };
3027                                if ($owner) {
3028                                        $pr->{'owner'} = to_utf8($owner);
3029                                }
3030                                push @list, $pr;
3031                        }
3032                }
3033                close $fd;
3034        }
3035        return @list;
3036}
3037
3038# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3039# as side effects it sets 'forks' field to list of forks for forked projects
3040sub filter_forks_from_projects_list {
3041        my $projects = shift;
3042
3043        my %trie; # prefix tree of directories (path components)
3044        # generate trie out of those directories that might contain forks
3045        foreach my $pr (@$projects) {
3046                my $path = $pr->{'path'};
3047                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3048                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3049                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3050                next unless (-d "$projectroot/$path"); # containing directory exists
3051                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3052
3053                # add to trie
3054                my @dirs = split('/', $path);
3055                # walk the trie, until either runs out of components or out of trie
3056                my $ref = \%trie;
3057                while (scalar @dirs &&
3058                       exists($ref->{$dirs[0]})) {
3059                        $ref = $ref->{shift @dirs};
3060                }
3061                # create rest of trie structure from rest of components
3062                foreach my $dir (@dirs) {
3063                        $ref = $ref->{$dir} = {};
3064                }
3065                # create end marker, store $pr as a data
3066                $ref->{''} = $pr if (!exists $ref->{''});
3067        }
3068
3069        # filter out forks, by finding shortest prefix match for paths
3070        my @filtered;
3071 PROJECT:
3072        foreach my $pr (@$projects) {
3073                # trie lookup
3074                my $ref = \%trie;
3075        DIR:
3076                foreach my $dir (split('/', $pr->{'path'})) {
3077                        if (exists $ref->{''}) {
3078                                # found [shortest] prefix, is a fork - skip it
3079                                push @{$ref->{''}{'forks'}}, $pr;
3080                                next PROJECT;
3081                        }
3082                        if (!exists $ref->{$dir}) {
3083                                # not in trie, cannot have prefix, not a fork
3084                                push @filtered, $pr;
3085                                next PROJECT;
3086                        }
3087                        # If the dir is there, we just walk one step down the trie.
3088                        $ref = $ref->{$dir};
3089                }
3090                # we ran out of trie
3091                # (shouldn't happen: it's either no match, or end marker)
3092                push @filtered, $pr;
3093        }
3094
3095        return @filtered;
3096}
3097
3098# note: fill_project_list_info must be run first,
3099# for 'descr_long' and 'ctags' to be filled
3100sub search_projects_list {
3101        my ($projlist, %opts) = @_;
3102        my $tagfilter  = $opts{'tagfilter'};
3103        my $search_re = $opts{'search_regexp'};
3104
3105        return @$projlist
3106                unless ($tagfilter || $search_re);
3107
3108        # searching projects require filling to be run before it;
3109        fill_project_list_info($projlist,
3110                               $tagfilter  ? 'ctags' : (),
3111                               $search_re ? ('path', 'descr') : ());
3112        my @projects;
3113 PROJECT:
3114        foreach my $pr (@$projlist) {
3115
3116                if ($tagfilter) {
3117                        next unless ref($pr->{'ctags'}) eq 'HASH';
3118                        next unless
3119                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3120                }
3121
3122                if ($search_re) {
3123                        next unless
3124                                $pr->{'path'} =~ /$search_re/ ||
3125                                $pr->{'descr_long'} =~ /$search_re/;
3126                }
3127
3128                push @projects, $pr;
3129        }
3130
3131        return @projects;
3132}
3133
3134our $gitweb_project_owner = undef;
3135sub git_get_project_list_from_file {
3136
3137        return if (defined $gitweb_project_owner);
3138
3139        $gitweb_project_owner = {};
3140        # read from file (url-encoded):
3141        # 'git%2Fgit.git Linus+Torvalds'
3142        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3143        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3144        if (-f $projects_list) {
3145                open(my $fd, '<', $projects_list);
3146                while (my $line = <$fd>) {
3147                        chomp $line;
3148                        my ($pr, $ow) = split ' ', $line;
3149                        $pr = unescape($pr);
3150                        $ow = unescape($ow);
3151                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3152                }
3153                close $fd;
3154        }
3155}
3156
3157sub git_get_project_owner {
3158        my $project = shift;
3159        my $owner;
3160
3161        return undef unless $project;
3162        $git_dir = "$projectroot/$project";
3163
3164        if (!defined $gitweb_project_owner) {
3165                git_get_project_list_from_file();
3166        }
3167
3168        if (exists $gitweb_project_owner->{$project}) {
3169                $owner = $gitweb_project_owner->{$project};
3170        }
3171        if (!defined $owner){
3172                $owner = git_get_project_config('owner');
3173        }
3174        if (!defined $owner) {
3175                $owner = get_file_owner("$git_dir");
3176        }
3177
3178        return $owner;
3179}
3180
3181sub git_get_last_activity {
3182        my ($path) = @_;
3183        my $fd;
3184
3185        $git_dir = "$projectroot/$path";
3186        open($fd, "-|", git_cmd(), 'for-each-ref',
3187             '--format=%(committer)',
3188             '--sort=-committerdate',
3189             '--count=1',
3190             'refs/heads') or return;
3191        my $most_recent = <$fd>;
3192        close $fd or return;
3193        if (defined $most_recent &&
3194            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3195                my $timestamp = $1;
3196                my $age = time - $timestamp;
3197                return ($age, age_string($age));
3198        }
3199        return (undef, undef);
3200}
3201
3202# Implementation note: when a single remote is wanted, we cannot use 'git
3203# remote show -n' because that command always work (assuming it's a remote URL
3204# if it's not defined), and we cannot use 'git remote show' because that would
3205# try to make a network roundtrip. So the only way to find if that particular
3206# remote is defined is to walk the list provided by 'git remote -v' and stop if
3207# and when we find what we want.
3208sub git_get_remotes_list {
3209        my $wanted = shift;
3210        my %remotes = ();
3211
3212        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3213        return unless $fd;
3214        while (my $remote = <$fd>) {
3215                chomp $remote;
3216                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3217                next if $wanted and not $remote eq $wanted;
3218                my ($url, $key) = ($1, $2);
3219
3220                $remotes{$remote} ||= { 'heads' => () };
3221                $remotes{$remote}{$key} = $url;
3222        }
3223        close $fd or return;
3224        return wantarray ? %remotes : \%remotes;
3225}
3226
3227# Takes a hash of remotes as first parameter and fills it by adding the
3228# available remote heads for each of the indicated remotes.
3229sub fill_remote_heads {
3230        my $remotes = shift;
3231        my @heads = map { "remotes/$_" } keys %$remotes;
3232        my @remoteheads = git_get_heads_list(undef, @heads);
3233        foreach my $remote (keys %$remotes) {
3234                $remotes->{$remote}{'heads'} = [ grep {
3235                        $_->{'name'} =~ s!^$remote/!!
3236                        } @remoteheads ];
3237        }
3238}
3239
3240sub git_get_references {
3241        my $type = shift || "";
3242        my %refs;
3243        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3244        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3245        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3246                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3247                or return;
3248
3249        while (my $line = <$fd>) {
3250                chomp $line;
3251                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3252                        if (defined $refs{$1}) {
3253                                push @{$refs{$1}}, $2;
3254                        } else {
3255                                $refs{$1} = [ $2 ];
3256                        }
3257                }
3258        }
3259        close $fd or return;
3260        return \%refs;
3261}
3262
3263sub git_get_rev_name_tags {
3264        my $hash = shift || return undef;
3265
3266        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3267                or return;
3268        my $name_rev = <$fd>;
3269        close $fd;
3270
3271        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3272                return $1;
3273        } else {
3274                # catches also '$hash undefined' output
3275                return undef;
3276        }
3277}
3278
3279## ----------------------------------------------------------------------
3280## parse to hash functions
3281
3282sub parse_date {
3283        my $epoch = shift;
3284        my $tz = shift || "-0000";
3285
3286        my %date;
3287        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3288        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3289        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3290        $date{'hour'} = $hour;
3291        $date{'minute'} = $min;
3292        $date{'mday'} = $mday;
3293        $date{'day'} = $days[$wday];
3294        $date{'month'} = $months[$mon];
3295        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3296                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3297        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3298                             $mday, $months[$mon], $hour ,$min;
3299        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3300                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3301
3302        my ($tz_sign, $tz_hour, $tz_min) =
3303                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3304        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3305        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3306        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3307        $date{'hour_local'} = $hour;
3308        $date{'minute_local'} = $min;
3309        $date{'tz_local'} = $tz;
3310        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3311                                  1900+$year, $mon+1, $mday,
3312                                  $hour, $min, $sec, $tz);
3313        return %date;
3314}
3315
3316sub parse_tag {
3317        my $tag_id = shift;
3318        my %tag;
3319        my @comment;
3320
3321        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3322        $tag{'id'} = $tag_id;
3323        while (my $line = <$fd>) {
3324                chomp $line;
3325                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3326                        $tag{'object'} = $1;
3327                } elsif ($line =~ m/^type (.+)$/) {
3328                        $tag{'type'} = $1;
3329                } elsif ($line =~ m/^tag (.+)$/) {
3330                        $tag{'name'} = $1;
3331                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3332                        $tag{'author'} = $1;
3333                        $tag{'author_epoch'} = $2;
3334                        $tag{'author_tz'} = $3;
3335                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3336                                $tag{'author_name'}  = $1;
3337                                $tag{'author_email'} = $2;
3338                        } else {
3339                                $tag{'author_name'} = $tag{'author'};
3340                        }
3341                } elsif ($line =~ m/--BEGIN/) {
3342                        push @comment, $line;
3343                        last;
3344                } elsif ($line eq "") {
3345                        last;
3346                }
3347        }
3348        push @comment, <$fd>;
3349        $tag{'comment'} = \@comment;
3350        close $fd or return;
3351        if (!defined $tag{'name'}) {
3352                return
3353        };
3354        return %tag
3355}
3356
3357sub parse_commit_text {
3358        my ($commit_text, $withparents) = @_;
3359        my @commit_lines = split '\n', $commit_text;
3360        my %co;
3361
3362        pop @commit_lines; # Remove '\0'
3363
3364        if (! @commit_lines) {
3365                return;
3366        }
3367
3368        my $header = shift @commit_lines;
3369        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3370                return;
3371        }
3372        ($co{'id'}, my @parents) = split ' ', $header;
3373        while (my $line = shift @commit_lines) {
3374                last if $line eq "\n";
3375                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3376                        $co{'tree'} = $1;
3377                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3378                        push @parents, $1;
3379                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3380                        $co{'author'} = to_utf8($1);
3381                        $co{'author_epoch'} = $2;
3382                        $co{'author_tz'} = $3;
3383                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3384                                $co{'author_name'}  = $1;
3385                                $co{'author_email'} = $2;
3386                        } else {
3387                                $co{'author_name'} = $co{'author'};
3388                        }
3389                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3390                        $co{'committer'} = to_utf8($1);
3391                        $co{'committer_epoch'} = $2;
3392                        $co{'committer_tz'} = $3;
3393                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3394                                $co{'committer_name'}  = $1;
3395                                $co{'committer_email'} = $2;
3396                        } else {
3397                                $co{'committer_name'} = $co{'committer'};
3398                        }
3399                }
3400        }
3401        if (!defined $co{'tree'}) {
3402                return;
3403        };
3404        $co{'parents'} = \@parents;
3405        $co{'parent'} = $parents[0];
3406
3407        foreach my $title (@commit_lines) {
3408                $title =~ s/^    //;
3409                if ($title ne "") {
3410                        $co{'title'} = chop_str($title, 80, 5);
3411                        # remove leading stuff of merges to make the interesting part visible
3412                        if (length($title) > 50) {
3413                                $title =~ s/^Automatic //;
3414                                $title =~ s/^merge (of|with) /Merge ... /i;
3415                                if (length($title) > 50) {
3416                                        $title =~ s/(http|rsync):\/\///;
3417                                }
3418                                if (length($title) > 50) {
3419                                        $title =~ s/(master|www|rsync)\.//;
3420                                }
3421                                if (length($title) > 50) {
3422                                        $title =~ s/kernel.org:?//;
3423                                }
3424                                if (length($title) > 50) {
3425                                        $title =~ s/\/pub\/scm//;
3426                                }
3427                        }
3428                        $co{'title_short'} = chop_str($title, 50, 5);
3429                        last;
3430                }
3431        }
3432        if (! defined $co{'title'} || $co{'title'} eq "") {
3433                $co{'title'} = $co{'title_short'} = '(no commit message)';
3434        }
3435        # remove added spaces
3436        foreach my $line (@commit_lines) {
3437                $line =~ s/^    //;
3438        }
3439        $co{'comment'} = \@commit_lines;
3440
3441        my $age = time - $co{'committer_epoch'};
3442        $co{'age'} = $age;
3443        $co{'age_string'} = age_string($age);
3444        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3445        if ($age > 60*60*24*7*2) {
3446                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3447                $co{'age_string_age'} = $co{'age_string'};
3448        } else {
3449                $co{'age_string_date'} = $co{'age_string'};
3450                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3451        }
3452        return %co;
3453}
3454
3455sub parse_commit {
3456        my ($commit_id) = @_;
3457        my %co;
3458
3459        local $/ = "\0";
3460
3461        open my $fd, "-|", git_cmd(), "rev-list",
3462                "--parents",
3463                "--header",
3464                "--max-count=1",
3465                $commit_id,
3466                "--",
3467                or die_error(500, "Open git-rev-list failed");
3468        %co = parse_commit_text(<$fd>, 1);
3469        close $fd;
3470
3471        return %co;
3472}
3473
3474sub parse_commits {
3475        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3476        my @cos;
3477
3478        $maxcount ||= 1;
3479        $skip ||= 0;
3480
3481        local $/ = "\0";
3482
3483        open my $fd, "-|", git_cmd(), "rev-list",
3484                "--header",
3485                @args,
3486                ("--max-count=" . $maxcount),
3487                ("--skip=" . $skip),
3488                @extra_options,
3489                $commit_id,
3490                "--",
3491                ($filename ? ($filename) : ())
3492                or die_error(500, "Open git-rev-list failed");
3493        while (my $line = <$fd>) {
3494                my %co = parse_commit_text($line);
3495                push @cos, \%co;
3496        }
3497        close $fd;
3498
3499        return wantarray ? @cos : \@cos;
3500}
3501
3502# parse line of git-diff-tree "raw" output
3503sub parse_difftree_raw_line {
3504        my $line = shift;
3505        my %res;
3506
3507        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3508        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3509        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3510                $res{'from_mode'} = $1;
3511                $res{'to_mode'} = $2;
3512                $res{'from_id'} = $3;
3513                $res{'to_id'} = $4;
3514                $res{'status'} = $5;
3515                $res{'similarity'} = $6;
3516                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3517                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3518                } else {
3519                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3520                }
3521        }
3522        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3523        # combined diff (for merge commit)
3524        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3525                $res{'nparents'}  = length($1);
3526                $res{'from_mode'} = [ split(' ', $2) ];
3527                $res{'to_mode'} = pop @{$res{'from_mode'}};
3528                $res{'from_id'} = [ split(' ', $3) ];
3529                $res{'to_id'} = pop @{$res{'from_id'}};
3530                $res{'status'} = [ split('', $4) ];
3531                $res{'to_file'} = unquote($5);
3532        }
3533        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3534        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3535                $res{'commit'} = $1;
3536        }
3537
3538        return wantarray ? %res : \%res;
3539}
3540
3541# wrapper: return parsed line of git-diff-tree "raw" output
3542# (the argument might be raw line, or parsed info)
3543sub parsed_difftree_line {
3544        my $line_or_ref = shift;
3545
3546        if (ref($line_or_ref) eq "HASH") {
3547                # pre-parsed (or generated by hand)
3548                return $line_or_ref;
3549        } else {
3550                return parse_difftree_raw_line($line_or_ref);
3551        }
3552}
3553
3554# parse line of git-ls-tree output
3555sub parse_ls_tree_line {
3556        my $line = shift;
3557        my %opts = @_;
3558        my %res;
3559
3560        if ($opts{'-l'}) {
3561                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3562                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3563
3564                $res{'mode'} = $1;
3565                $res{'type'} = $2;
3566                $res{'hash'} = $3;
3567                $res{'size'} = $4;
3568                if ($opts{'-z'}) {
3569                        $res{'name'} = $5;
3570                } else {
3571                        $res{'name'} = unquote($5);
3572                }
3573        } else {
3574                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3575                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3576
3577                $res{'mode'} = $1;
3578                $res{'type'} = $2;
3579                $res{'hash'} = $3;
3580                if ($opts{'-z'}) {
3581                        $res{'name'} = $4;
3582                } else {
3583                        $res{'name'} = unquote($4);
3584                }
3585        }
3586
3587        return wantarray ? %res : \%res;
3588}
3589
3590# generates _two_ hashes, references to which are passed as 2 and 3 argument
3591sub parse_from_to_diffinfo {
3592        my ($diffinfo, $from, $to, @parents) = @_;
3593
3594        if ($diffinfo->{'nparents'}) {
3595                # combined diff
3596                $from->{'file'} = [];
3597                $from->{'href'} = [];
3598                fill_from_file_info($diffinfo, @parents)
3599                        unless exists $diffinfo->{'from_file'};
3600                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3601                        $from->{'file'}[$i] =
3602                                defined $diffinfo->{'from_file'}[$i] ?
3603                                        $diffinfo->{'from_file'}[$i] :
3604                                        $diffinfo->{'to_file'};
3605                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3606                                $from->{'href'}[$i] = href(action=>"blob",
3607                                                           hash_base=>$parents[$i],
3608                                                           hash=>$diffinfo->{'from_id'}[$i],
3609                                                           file_name=>$from->{'file'}[$i]);
3610                        } else {
3611                                $from->{'href'}[$i] = undef;
3612                        }
3613                }
3614        } else {
3615                # ordinary (not combined) diff
3616                $from->{'file'} = $diffinfo->{'from_file'};
3617                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3618                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3619                                               hash=>$diffinfo->{'from_id'},
3620                                               file_name=>$from->{'file'});
3621                } else {
3622                        delete $from->{'href'};
3623                }
3624        }
3625
3626        $to->{'file'} = $diffinfo->{'to_file'};
3627        if (!is_deleted($diffinfo)) { # file exists in result
3628                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3629                                     hash=>$diffinfo->{'to_id'},
3630                                     file_name=>$to->{'file'});
3631        } else {
3632                delete $to->{'href'};
3633        }
3634}
3635
3636## ......................................................................
3637## parse to array of hashes functions
3638
3639sub git_get_heads_list {
3640        my ($limit, @classes) = @_;
3641        @classes = ('heads') unless @classes;
3642        my @patterns = map { "refs/$_" } @classes;
3643        my @headslist;
3644
3645        open my $fd, '-|', git_cmd(), 'for-each-ref',
3646                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3647                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3648                @patterns
3649                or return;
3650        while (my $line = <$fd>) {
3651                my %ref_item;
3652
3653                chomp $line;
3654                my ($refinfo, $committerinfo) = split(/\0/, $line);
3655                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3656                my ($committer, $epoch, $tz) =
3657                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3658                $ref_item{'fullname'}  = $name;
3659                $name =~ s!^refs/(?:head|remote)s/!!;
3660
3661                $ref_item{'name'}  = $name;
3662                $ref_item{'id'}    = $hash;
3663                $ref_item{'title'} = $title || '(no commit message)';
3664                $ref_item{'epoch'} = $epoch;
3665                if ($epoch) {
3666                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3667                } else {
3668                        $ref_item{'age'} = "unknown";
3669                }
3670
3671                push @headslist, \%ref_item;
3672        }
3673        close $fd;
3674
3675        return wantarray ? @headslist : \@headslist;
3676}
3677
3678sub git_get_tags_list {
3679        my $limit = shift;
3680        my @tagslist;
3681
3682        open my $fd, '-|', git_cmd(), 'for-each-ref',
3683                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3684                '--format=%(objectname) %(objecttype) %(refname) '.
3685                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3686                'refs/tags'
3687                or return;
3688        while (my $line = <$fd>) {
3689                my %ref_item;
3690
3691                chomp $line;
3692                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3693                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3694                my ($creator, $epoch, $tz) =
3695                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3696                $ref_item{'fullname'} = $name;
3697                $name =~ s!^refs/tags/!!;
3698
3699                $ref_item{'type'} = $type;
3700                $ref_item{'id'} = $id;
3701                $ref_item{'name'} = $name;
3702                if ($type eq "tag") {
3703                        $ref_item{'subject'} = $title;
3704                        $ref_item{'reftype'} = $reftype;
3705                        $ref_item{'refid'}   = $refid;
3706                } else {
3707                        $ref_item{'reftype'} = $type;
3708                        $ref_item{'refid'}   = $id;
3709                }
3710
3711                if ($type eq "tag" || $type eq "commit") {
3712                        $ref_item{'epoch'} = $epoch;
3713                        if ($epoch) {
3714                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3715                        } else {
3716                                $ref_item{'age'} = "unknown";
3717                        }
3718                }
3719
3720                push @tagslist, \%ref_item;
3721        }
3722        close $fd;
3723
3724        return wantarray ? @tagslist : \@tagslist;
3725}
3726
3727## ----------------------------------------------------------------------
3728## filesystem-related functions
3729
3730sub get_file_owner {
3731        my $path = shift;
3732
3733        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3734        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3735        if (!defined $gcos) {
3736                return undef;
3737        }
3738        my $owner = $gcos;
3739        $owner =~ s/[,;].*$//;
3740        return to_utf8($owner);
3741}
3742
3743# assume that file exists
3744sub insert_file {
3745        my $filename = shift;
3746
3747        open my $fd, '<', $filename;
3748        print map { to_utf8($_) } <$fd>;
3749        close $fd;
3750}
3751
3752## ......................................................................
3753## mimetype related functions
3754
3755sub mimetype_guess_file {
3756        my $filename = shift;
3757        my $mimemap = shift;
3758        -r $mimemap or return undef;
3759
3760        my %mimemap;
3761        open(my $mh, '<', $mimemap) or return undef;
3762        while (<$mh>) {
3763                next if m/^#/; # skip comments
3764                my ($mimetype, @exts) = split(/\s+/);
3765                foreach my $ext (@exts) {
3766                        $mimemap{$ext} = $mimetype;
3767                }
3768        }
3769        close($mh);
3770
3771        $filename =~ /\.([^.]*)$/;
3772        return $mimemap{$1};
3773}
3774
3775sub mimetype_guess {
3776        my $filename = shift;
3777        my $mime;
3778        $filename =~ /\./ or return undef;
3779
3780        if ($mimetypes_file) {
3781                my $file = $mimetypes_file;
3782                if ($file !~ m!^/!) { # if it is relative path
3783                        # it is relative to project
3784                        $file = "$projectroot/$project/$file";
3785                }
3786                $mime = mimetype_guess_file($filename, $file);
3787        }
3788        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3789        return $mime;
3790}
3791
3792sub blob_mimetype {
3793        my $fd = shift;
3794        my $filename = shift;
3795
3796        if ($filename) {
3797                my $mime = mimetype_guess($filename);
3798                $mime and return $mime;
3799        }
3800
3801        # just in case
3802        return $default_blob_plain_mimetype unless $fd;
3803
3804        if (-T $fd) {
3805                return 'text/plain';
3806        } elsif (! $filename) {
3807                return 'application/octet-stream';
3808        } elsif ($filename =~ m/\.png$/i) {
3809                return 'image/png';
3810        } elsif ($filename =~ m/\.gif$/i) {
3811                return 'image/gif';
3812        } elsif ($filename =~ m/\.jpe?g$/i) {
3813                return 'image/jpeg';
3814        } else {
3815                return 'application/octet-stream';
3816        }
3817}
3818
3819sub blob_contenttype {
3820        my ($fd, $file_name, $type) = @_;
3821
3822        $type ||= blob_mimetype($fd, $file_name);
3823        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3824                $type .= "; charset=$default_text_plain_charset";
3825        }
3826
3827        return $type;
3828}
3829
3830# guess file syntax for syntax highlighting; return undef if no highlighting
3831# the name of syntax can (in the future) depend on syntax highlighter used
3832sub guess_file_syntax {
3833        my ($highlight, $mimetype, $file_name) = @_;
3834        return undef unless ($highlight && defined $file_name);
3835        my $basename = basename($file_name, '.in');
3836        return $highlight_basename{$basename}
3837                if exists $highlight_basename{$basename};
3838
3839        $basename =~ /\.([^.]*)$/;
3840        my $ext = $1 or return undef;
3841        return $highlight_ext{$ext}
3842                if exists $highlight_ext{$ext};
3843
3844        return undef;
3845}
3846
3847# run highlighter and return FD of its output,
3848# or return original FD if no highlighting
3849sub run_highlighter {
3850        my ($fd, $highlight, $syntax) = @_;
3851        return $fd unless ($highlight && defined $syntax);
3852
3853        close $fd;
3854        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3855                  quote_command($highlight_bin).
3856                  " --replace-tabs=8 --fragment --syntax $syntax |"
3857                or die_error(500, "Couldn't open file or run syntax highlighter");
3858        return $fd;
3859}
3860
3861## ======================================================================
3862## functions printing HTML: header, footer, error page
3863
3864sub get_page_title {
3865        my $title = to_utf8($site_name);
3866
3867        unless (defined $project) {
3868                if (defined $project_filter) {
3869                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3870                }
3871                return $title;
3872        }
3873        $title .= " - " . to_utf8($project);
3874
3875        return $title unless (defined $action);
3876        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3877
3878        return $title unless (defined $file_name);
3879        $title .= " - " . esc_path($file_name);
3880        if ($action eq "tree" && $file_name !~ m|/$|) {
3881                $title .= "/";
3882        }
3883
3884        return $title;
3885}
3886
3887sub get_content_type_html {
3888        # require explicit support from the UA if we are to send the page as
3889        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3890        # we have to do this because MSIE sometimes globs '*/*', pretending to
3891        # support xhtml+xml but choking when it gets what it asked for.
3892        if (defined $cgi->http('HTTP_ACCEPT') &&
3893            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3894            $cgi->Accept('application/xhtml+xml') != 0) {
3895                return 'application/xhtml+xml';
3896        } else {
3897                return 'text/html';
3898        }
3899}
3900
3901sub print_feed_meta {
3902        if (defined $project) {
3903                my %href_params = get_feed_info();
3904                if (!exists $href_params{'-title'}) {
3905                        $href_params{'-title'} = 'log';
3906                }
3907
3908                foreach my $format (qw(RSS Atom)) {
3909                        my $type = lc($format);
3910                        my %link_attr = (
3911                                '-rel' => 'alternate',
3912                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3913                                '-type' => "application/$type+xml"
3914                        );
3915
3916                        $href_params{'extra_options'} = undef;
3917                        $href_params{'action'} = $type;
3918                        $link_attr{'-href'} = href(%href_params);
3919                        print "<link ".
3920                              "rel=\"$link_attr{'-rel'}\" ".
3921                              "title=\"$link_attr{'-title'}\" ".
3922                              "href=\"$link_attr{'-href'}\" ".
3923                              "type=\"$link_attr{'-type'}\" ".
3924                              "/>\n";
3925
3926                        $href_params{'extra_options'} = '--no-merges';
3927                        $link_attr{'-href'} = href(%href_params);
3928                        $link_attr{'-title'} .= ' (no merges)';
3929                        print "<link ".
3930                              "rel=\"$link_attr{'-rel'}\" ".
3931                              "title=\"$link_attr{'-title'}\" ".
3932                              "href=\"$link_attr{'-href'}\" ".
3933                              "type=\"$link_attr{'-type'}\" ".
3934                              "/>\n";
3935                }
3936
3937        } else {
3938                printf('<link rel="alternate" title="%s projects list" '.
3939                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3940                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3941                printf('<link rel="alternate" title="%s projects feeds" '.
3942                       'href="%s" type="text/x-opml" />'."\n",
3943                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3944        }
3945}
3946
3947sub print_header_links {
3948        my $status = shift;
3949
3950        # print out each stylesheet that exist, providing backwards capability
3951        # for those people who defined $stylesheet in a config file
3952        if (defined $stylesheet) {
3953                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3954        } else {
3955                foreach my $stylesheet (@stylesheets) {
3956                        next unless $stylesheet;
3957                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3958                }
3959        }
3960        print_feed_meta()
3961                if ($status eq '200 OK');
3962        if (defined $favicon) {
3963                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3964        }
3965}
3966
3967sub print_nav_breadcrumbs_path {
3968        my $dirprefix = undef;
3969        while (my $part = shift) {
3970                $dirprefix .= "/" if defined $dirprefix;
3971                $dirprefix .= $part;
3972                print $cgi->a({-href => href(project => undef,
3973                                             project_filter => $dirprefix,
3974                                             action => "project_list")},
3975                              esc_html($part)) . " / ";
3976        }
3977}
3978
3979sub print_nav_breadcrumbs {
3980        my %opts = @_;
3981
3982        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3983        if (defined $project) {
3984                my @dirname = split '/', $project;
3985                my $projectbasename = pop @dirname;
3986                print_nav_breadcrumbs_path(@dirname);
3987                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3988                if (defined $action) {
3989                        my $action_print = $action ;
3990                        if (defined $opts{-action_extra}) {
3991                                $action_print = $cgi->a({-href => href(action=>$action)},
3992                                        $action);
3993                        }
3994                        print " / $action_print";
3995                }
3996                if (defined $opts{-action_extra}) {
3997                        print " / $opts{-action_extra}";
3998                }
3999                print "\n";
4000        } elsif (defined $project_filter) {
4001                print_nav_breadcrumbs_path(split '/', $project_filter);
4002        }
4003}
4004
4005sub print_search_form {
4006        if (!defined $searchtext) {
4007                $searchtext = "";
4008        }
4009        my $search_hash;
4010        if (defined $hash_base) {
4011                $search_hash = $hash_base;
4012        } elsif (defined $hash) {
4013                $search_hash = $hash;
4014        } else {
4015                $search_hash = "HEAD";
4016        }
4017        my $action = $my_uri;
4018        my $use_pathinfo = gitweb_check_feature('pathinfo');
4019        if ($use_pathinfo) {
4020                $action .= "/".esc_url($project);
4021        }
4022        print $cgi->startform(-method => "get", -action => $action) .
4023              "<div class=\"search\">\n" .
4024              (!$use_pathinfo &&
4025              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4026              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4027              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4028              $cgi->popup_menu(-name => 'st', -default => 'commit',
4029                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4030              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4031              " search:\n",
4032              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4033              "<span title=\"Extended regular expression\">" .
4034              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4035                             -checked => $search_use_regexp) .
4036              "</span>" .
4037              "</div>" .
4038              $cgi->end_form() . "\n";
4039}
4040
4041sub git_header_html {
4042        my $status = shift || "200 OK";
4043        my $expires = shift;
4044        my %opts = @_;
4045
4046        my $title = get_page_title();
4047        my $content_type = get_content_type_html();
4048        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4049                           -status=> $status, -expires => $expires)
4050                unless ($opts{'-no_http_header'});
4051        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4052        print <<EOF;
4053<?xml version="1.0" encoding="utf-8"?>
4054<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4055<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4056<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4057<!-- git core binaries version $git_version -->
4058<head>
4059<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4060<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4061<meta name="robots" content="index, nofollow"/>
4062<title>$title</title>
4063EOF
4064        # the stylesheet, favicon etc urls won't work correctly with path_info
4065        # unless we set the appropriate base URL
4066        if ($ENV{'PATH_INFO'}) {
4067                print "<base href=\"".esc_url($base_url)."\" />\n";
4068        }
4069        print_header_links($status);
4070
4071        if (defined $site_html_head_string) {
4072                print to_utf8($site_html_head_string);
4073        }
4074
4075        print "</head>\n" .
4076              "<body>\n";
4077
4078        if (defined $site_header && -f $site_header) {
4079                insert_file($site_header);
4080        }
4081
4082        print "<div class=\"page_header\">\n";
4083        if (defined $logo) {
4084                print $cgi->a({-href => esc_url($logo_url),
4085                               -title => $logo_label},
4086                              $cgi->img({-src => esc_url($logo),
4087                                         -width => 72, -height => 27,
4088                                         -alt => "git",
4089                                         -class => "logo"}));
4090        }
4091        print_nav_breadcrumbs(%opts);
4092        print "</div>\n";
4093
4094        my $have_search = gitweb_check_feature('search');
4095        if (defined $project && $have_search) {
4096                print_search_form();
4097        }
4098}
4099
4100sub git_footer_html {
4101        my $feed_class = 'rss_logo';
4102
4103        print "<div class=\"page_footer\">\n";
4104        if (defined $project) {
4105                my $descr = git_get_project_description($project);
4106                if (defined $descr) {
4107                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4108                }
4109
4110                my %href_params = get_feed_info();
4111                if (!%href_params) {
4112                        $feed_class .= ' generic';
4113                }
4114                $href_params{'-title'} ||= 'log';
4115
4116                foreach my $format (qw(RSS Atom)) {
4117                        $href_params{'action'} = lc($format);
4118                        print $cgi->a({-href => href(%href_params),
4119                                      -title => "$href_params{'-title'} $format feed",
4120                                      -class => $feed_class}, $format)."\n";
4121                }
4122
4123        } else {
4124                print $cgi->a({-href => href(project=>undef, action=>"opml",
4125                                             project_filter => $project_filter),
4126                              -class => $feed_class}, "OPML") . " ";
4127                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4128                                             project_filter => $project_filter),
4129                              -class => $feed_class}, "TXT") . "\n";
4130        }
4131        print "</div>\n"; # class="page_footer"
4132
4133        if (defined $t0 && gitweb_check_feature('timed')) {
4134                print "<div id=\"generating_info\">\n";
4135                print 'This page took '.
4136                      '<span id="generating_time" class="time_span">'.
4137                      tv_interval($t0, [ gettimeofday() ]).
4138                      ' seconds </span>'.
4139                      ' and '.
4140                      '<span id="generating_cmd">'.
4141                      $number_of_git_cmds.
4142                      '</span> git commands '.
4143                      " to generate.\n";
4144                print "</div>\n"; # class="page_footer"
4145        }
4146
4147        if (defined $site_footer && -f $site_footer) {
4148                insert_file($site_footer);
4149        }
4150
4151        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4152        if (defined $action &&
4153            $action eq 'blame_incremental') {
4154                print qq!<script type="text/javascript">\n!.
4155                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4156                      qq!           "!. href() .qq!");\n!.
4157                      qq!</script>\n!;
4158        } else {
4159                my ($jstimezone, $tz_cookie, $datetime_class) =
4160                        gitweb_get_feature('javascript-timezone');
4161
4162                print qq!<script type="text/javascript">\n!.
4163                      qq!window.onload = function () {\n!;
4164                if (gitweb_check_feature('javascript-actions')) {
4165                        print qq!       fixLinks();\n!;
4166                }
4167                if ($jstimezone && $tz_cookie && $datetime_class) {
4168                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4169                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4170                }
4171                print qq!};\n!.
4172                      qq!</script>\n!;
4173        }
4174
4175        print "</body>\n" .
4176              "</html>";
4177}
4178
4179# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4180# Example: die_error(404, 'Hash not found')
4181# By convention, use the following status codes (as defined in RFC 2616):
4182# 400: Invalid or missing CGI parameters, or
4183#      requested object exists but has wrong type.
4184# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4185#      this server or project.
4186# 404: Requested object/revision/project doesn't exist.
4187# 500: The server isn't configured properly, or
4188#      an internal error occurred (e.g. failed assertions caused by bugs), or
4189#      an unknown error occurred (e.g. the git binary died unexpectedly).
4190# 503: The server is currently unavailable (because it is overloaded,
4191#      or down for maintenance).  Generally, this is a temporary state.
4192sub die_error {
4193        my $status = shift || 500;
4194        my $error = esc_html(shift) || "Internal Server Error";
4195        my $extra = shift;
4196        my %opts = @_;
4197
4198        my %http_responses = (
4199                400 => '400 Bad Request',
4200                403 => '403 Forbidden',
4201                404 => '404 Not Found',
4202                500 => '500 Internal Server Error',
4203                503 => '503 Service Unavailable',
4204        );
4205        git_header_html($http_responses{$status}, undef, %opts);
4206        print <<EOF;
4207<div class="page_body">
4208<br /><br />
4209$status - $error
4210<br />
4211EOF
4212        if (defined $extra) {
4213                print "<hr />\n" .
4214                      "$extra\n";
4215        }
4216        print "</div>\n";
4217
4218        git_footer_html();
4219        goto DONE_GITWEB
4220                unless ($opts{'-error_handler'});
4221}
4222
4223## ----------------------------------------------------------------------
4224## functions printing or outputting HTML: navigation
4225
4226sub git_print_page_nav {
4227        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4228        $extra = '' if !defined $extra; # pager or formats
4229
4230        my @navs = qw(summary shortlog log commit commitdiff tree);
4231        if ($suppress) {
4232                @navs = grep { $_ ne $suppress } @navs;
4233        }
4234
4235        my %arg = map { $_ => {action=>$_} } @navs;
4236        if (defined $head) {
4237                for (qw(commit commitdiff)) {
4238                        $arg{$_}{'hash'} = $head;
4239                }
4240                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4241                        for (qw(shortlog log)) {
4242                                $arg{$_}{'hash'} = $head;
4243                        }
4244                }
4245        }
4246
4247        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4248        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4249
4250        my @actions = gitweb_get_feature('actions');
4251        my %repl = (
4252                '%' => '%',
4253                'n' => $project,         # project name
4254                'f' => $git_dir,         # project path within filesystem
4255                'h' => $treehead || '',  # current hash ('h' parameter)
4256                'b' => $treebase || '',  # hash base ('hb' parameter)
4257        );
4258        while (@actions) {
4259                my ($label, $link, $pos) = splice(@actions,0,3);
4260                # insert
4261                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4262                # munch munch
4263                $link =~ s/%([%nfhb])/$repl{$1}/g;
4264                $arg{$label}{'_href'} = $link;
4265        }
4266
4267        print "<div class=\"page_nav\">\n" .
4268                (join " | ",
4269                 map { $_ eq $current ?
4270                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4271                 } @navs);
4272        print "<br/>\n$extra<br/>\n" .
4273              "</div>\n";
4274}
4275
4276# returns a submenu for the nagivation of the refs views (tags, heads,
4277# remotes) with the current view disabled and the remotes view only
4278# available if the feature is enabled
4279sub format_ref_views {
4280        my ($current) = @_;
4281        my @ref_views = qw{tags heads};
4282        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4283        return join " | ", map {
4284                $_ eq $current ? $_ :
4285                $cgi->a({-href => href(action=>$_)}, $_)
4286        } @ref_views
4287}
4288
4289sub format_paging_nav {
4290        my ($action, $page, $has_next_link) = @_;
4291        my $paging_nav;
4292
4293
4294        if ($page > 0) {
4295                $paging_nav .=
4296                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4297                        " &sdot; " .
4298                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4299                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4300        } else {
4301                $paging_nav .= "first &sdot; prev";
4302        }
4303
4304        if ($has_next_link) {
4305                $paging_nav .= " &sdot; " .
4306                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4307                                 -accesskey => "n", -title => "Alt-n"}, "next");
4308        } else {
4309                $paging_nav .= " &sdot; next";
4310        }
4311
4312        return $paging_nav;
4313}
4314
4315## ......................................................................
4316## functions printing or outputting HTML: div
4317
4318sub git_print_header_div {
4319        my ($action, $title, $hash, $hash_base) = @_;
4320        my %args = ();
4321
4322        $args{'action'} = $action;
4323        $args{'hash'} = $hash if $hash;
4324        $args{'hash_base'} = $hash_base if $hash_base;
4325
4326        print "<div class=\"header\">\n" .
4327              $cgi->a({-href => href(%args), -class => "title"},
4328              $title ? $title : $action) .
4329              "\n</div>\n";
4330}
4331
4332sub format_repo_url {
4333        my ($name, $url) = @_;
4334        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4335}
4336
4337# Group output by placing it in a DIV element and adding a header.
4338# Options for start_div() can be provided by passing a hash reference as the
4339# first parameter to the function.
4340# Options to git_print_header_div() can be provided by passing an array
4341# reference. This must follow the options to start_div if they are present.
4342# The content can be a scalar, which is output as-is, a scalar reference, which
4343# is output after html escaping, an IO handle passed either as *handle or
4344# *handle{IO}, or a function reference. In the latter case all following
4345# parameters will be taken as argument to the content function call.
4346sub git_print_section {
4347        my ($div_args, $header_args, $content);
4348        my $arg = shift;
4349        if (ref($arg) eq 'HASH') {
4350                $div_args = $arg;
4351                $arg = shift;
4352        }
4353        if (ref($arg) eq 'ARRAY') {
4354                $header_args = $arg;
4355                $arg = shift;
4356        }
4357        $content = $arg;
4358
4359        print $cgi->start_div($div_args);
4360        git_print_header_div(@$header_args);
4361
4362        if (ref($content) eq 'CODE') {
4363                $content->(@_);
4364        } elsif (ref($content) eq 'SCALAR') {
4365                print esc_html($$content);
4366        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4367                print <$content>;
4368        } elsif (!ref($content) && defined($content)) {
4369                print $content;
4370        }
4371
4372        print $cgi->end_div;
4373}
4374
4375sub format_timestamp_html {
4376        my $date = shift;
4377        my $strtime = $date->{'rfc2822'};
4378
4379        my (undef, undef, $datetime_class) =
4380                gitweb_get_feature('javascript-timezone');
4381        if ($datetime_class) {
4382                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4383        }
4384
4385        my $localtime_format = '(%02d:%02d %s)';
4386        if ($date->{'hour_local'} < 6) {
4387                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4388        }
4389        $strtime .= ' ' .
4390                    sprintf($localtime_format,
4391                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4392
4393        return $strtime;
4394}
4395
4396# Outputs the author name and date in long form
4397sub git_print_authorship {
4398        my $co = shift;
4399        my %opts = @_;
4400        my $tag = $opts{-tag} || 'div';
4401        my $author = $co->{'author_name'};
4402
4403        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4404        print "<$tag class=\"author_date\">" .
4405              format_search_author($author, "author", esc_html($author)) .
4406              " [".format_timestamp_html(\%ad)."]".
4407              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4408              "</$tag>\n";
4409}
4410
4411# Outputs table rows containing the full author or committer information,
4412# in the format expected for 'commit' view (& similar).
4413# Parameters are a commit hash reference, followed by the list of people
4414# to output information for. If the list is empty it defaults to both
4415# author and committer.
4416sub git_print_authorship_rows {
4417        my $co = shift;
4418        # too bad we can't use @people = @_ || ('author', 'committer')
4419        my @people = @_;
4420        @people = ('author', 'committer') unless @people;
4421        foreach my $who (@people) {
4422                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4423                print "<tr><td>$who</td><td>" .
4424                      format_search_author($co->{"${who}_name"}, $who,
4425                                           esc_html($co->{"${who}_name"})) . " " .
4426                      format_search_author($co->{"${who}_email"}, $who,
4427                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4428                      "</td><td rowspan=\"2\">" .
4429                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4430                      "</td></tr>\n" .
4431                      "<tr>" .
4432                      "<td></td><td>" .
4433                      format_timestamp_html(\%wd) .
4434                      "</td>" .
4435                      "</tr>\n";
4436        }
4437}
4438
4439sub git_print_page_path {
4440        my $name = shift;
4441        my $type = shift;
4442        my $hb = shift;
4443
4444
4445        print "<div class=\"page_path\">";
4446        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4447                      -title => 'tree root'}, to_utf8("[$project]"));
4448        print " / ";
4449        if (defined $name) {
4450                my @dirname = split '/', $name;
4451                my $basename = pop @dirname;
4452                my $fullname = '';
4453
4454                foreach my $dir (@dirname) {
4455                        $fullname .= ($fullname ? '/' : '') . $dir;
4456                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4457                                                     hash_base=>$hb),
4458                                      -title => $fullname}, esc_path($dir));
4459                        print " / ";
4460                }
4461                if (defined $type && $type eq 'blob') {
4462                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4463                                                     hash_base=>$hb),
4464                                      -title => $name}, esc_path($basename));
4465                } elsif (defined $type && $type eq 'tree') {
4466                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4467                                                     hash_base=>$hb),
4468                                      -title => $name}, esc_path($basename));
4469                        print " / ";
4470                } else {
4471                        print esc_path($basename);
4472                }
4473        }
4474        print "<br/></div>\n";
4475}
4476
4477sub git_print_log {
4478        my $log = shift;
4479        my %opts = @_;
4480
4481        if ($opts{'-remove_title'}) {
4482                # remove title, i.e. first line of log
4483                shift @$log;
4484        }
4485        # remove leading empty lines
4486        while (defined $log->[0] && $log->[0] eq "") {
4487                shift @$log;
4488        }
4489
4490        # print log
4491        my $skip_blank_line = 0;
4492        foreach my $line (@$log) {
4493                if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4494                        if (! $opts{'-remove_signoff'}) {
4495                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4496                                $skip_blank_line = 1;
4497                        }
4498                        next;
4499                }
4500
4501                if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4502                        if (! $opts{'-remove_signoff'}) {
4503                                print "<span class=\"signoff\">" . esc_html($1) . ": " .
4504                                        "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4505                                        "</span><br/>\n";
4506                                $skip_blank_line = 1;
4507                        }
4508                        next;
4509                }
4510
4511                # print only one empty line
4512                # do not print empty line after signoff
4513                if ($line eq "") {
4514                        next if ($skip_blank_line);
4515                        $skip_blank_line = 1;
4516                } else {
4517                        $skip_blank_line = 0;
4518                }
4519
4520                print format_log_line_html($line) . "<br/>\n";
4521        }
4522
4523        if ($opts{'-final_empty_line'}) {
4524                # end with single empty line
4525                print "<br/>\n" unless $skip_blank_line;
4526        }
4527}
4528
4529# return link target (what link points to)
4530sub git_get_link_target {
4531        my $hash = shift;
4532        my $link_target;
4533
4534        # read link
4535        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4536                or return;
4537        {
4538                local $/ = undef;
4539                $link_target = <$fd>;
4540        }
4541        close $fd
4542                or return;
4543
4544        return $link_target;
4545}
4546
4547# given link target, and the directory (basedir) the link is in,
4548# return target of link relative to top directory (top tree);
4549# return undef if it is not possible (including absolute links).
4550sub normalize_link_target {
4551        my ($link_target, $basedir) = @_;
4552
4553        # absolute symlinks (beginning with '/') cannot be normalized
4554        return if (substr($link_target, 0, 1) eq '/');
4555
4556        # normalize link target to path from top (root) tree (dir)
4557        my $path;
4558        if ($basedir) {
4559                $path = $basedir . '/' . $link_target;
4560        } else {
4561                # we are in top (root) tree (dir)
4562                $path = $link_target;
4563        }
4564
4565        # remove //, /./, and /../
4566        my @path_parts;
4567        foreach my $part (split('/', $path)) {
4568                # discard '.' and ''
4569                next if (!$part || $part eq '.');
4570                # handle '..'
4571                if ($part eq '..') {
4572                        if (@path_parts) {
4573                                pop @path_parts;
4574                        } else {
4575                                # link leads outside repository (outside top dir)
4576                                return;
4577                        }
4578                } else {
4579                        push @path_parts, $part;
4580                }
4581        }
4582        $path = join('/', @path_parts);
4583
4584        return $path;
4585}
4586
4587# print tree entry (row of git_tree), but without encompassing <tr> element
4588sub git_print_tree_entry {
4589        my ($t, $basedir, $hash_base, $have_blame) = @_;
4590
4591        my %base_key = ();
4592        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4593
4594        # The format of a table row is: mode list link.  Where mode is
4595        # the mode of the entry, list is the name of the entry, an href,
4596        # and link is the action links of the entry.
4597
4598        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4599        if (exists $t->{'size'}) {
4600                print "<td class=\"size\">$t->{'size'}</td>\n";
4601        }
4602        if ($t->{'type'} eq "blob") {
4603                print "<td class=\"list\">" .
4604                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4605                                               file_name=>"$basedir$t->{'name'}", %base_key),
4606                                -class => "list"}, esc_path($t->{'name'}));
4607                if (S_ISLNK(oct $t->{'mode'})) {
4608                        my $link_target = git_get_link_target($t->{'hash'});
4609                        if ($link_target) {
4610                                my $norm_target = normalize_link_target($link_target, $basedir);
4611                                if (defined $norm_target) {
4612                                        print " -> " .
4613                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4614                                                                     file_name=>$norm_target),
4615                                                       -title => $norm_target}, esc_path($link_target));
4616                                } else {
4617                                        print " -> " . esc_path($link_target);
4618                                }
4619                        }
4620                }
4621                print "</td>\n";
4622                print "<td class=\"link\">";
4623                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4624                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4625                              "blob");
4626                if ($have_blame) {
4627                        print " | " .
4628                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4629                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4630                                      "blame");
4631                }
4632                if (defined $hash_base) {
4633                        print " | " .
4634                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4635                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4636                                      "history");
4637                }
4638                print " | " .
4639                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4640                                               file_name=>"$basedir$t->{'name'}")},
4641                                "raw");
4642                print "</td>\n";
4643
4644        } elsif ($t->{'type'} eq "tree") {
4645                print "<td class=\"list\">";
4646                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4647                                             file_name=>"$basedir$t->{'name'}",
4648                                             %base_key)},
4649                              esc_path($t->{'name'}));
4650                print "</td>\n";
4651                print "<td class=\"link\">";
4652                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4653                                             file_name=>"$basedir$t->{'name'}",
4654                                             %base_key)},
4655                              "tree");
4656                if (defined $hash_base) {
4657                        print " | " .
4658                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4659                                                     file_name=>"$basedir$t->{'name'}")},
4660                                      "history");
4661                }
4662                print "</td>\n";
4663        } else {
4664                # unknown object: we can only present history for it
4665                # (this includes 'commit' object, i.e. submodule support)
4666                print "<td class=\"list\">" .
4667                      esc_path($t->{'name'}) .
4668                      "</td>\n";
4669                print "<td class=\"link\">";
4670                if (defined $hash_base) {
4671                        print $cgi->a({-href => href(action=>"history",
4672                                                     hash_base=>$hash_base,
4673                                                     file_name=>"$basedir$t->{'name'}")},
4674                                      "history");
4675                }
4676                print "</td>\n";
4677        }
4678}
4679
4680## ......................................................................
4681## functions printing large fragments of HTML
4682
4683# get pre-image filenames for merge (combined) diff
4684sub fill_from_file_info {
4685        my ($diff, @parents) = @_;
4686
4687        $diff->{'from_file'} = [ ];
4688        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4689        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4690                if ($diff->{'status'}[$i] eq 'R' ||
4691                    $diff->{'status'}[$i] eq 'C') {
4692                        $diff->{'from_file'}[$i] =
4693                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4694                }
4695        }
4696
4697        return $diff;
4698}
4699
4700# is current raw difftree line of file deletion
4701sub is_deleted {
4702        my $diffinfo = shift;
4703
4704        return $diffinfo->{'to_id'} eq ('0' x 40);
4705}
4706
4707# does patch correspond to [previous] difftree raw line
4708# $diffinfo  - hashref of parsed raw diff format
4709# $patchinfo - hashref of parsed patch diff format
4710#              (the same keys as in $diffinfo)
4711sub is_patch_split {
4712        my ($diffinfo, $patchinfo) = @_;
4713
4714        return defined $diffinfo && defined $patchinfo
4715                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4716}
4717
4718
4719sub git_difftree_body {
4720        my ($difftree, $hash, @parents) = @_;
4721        my ($parent) = $parents[0];
4722        my $have_blame = gitweb_check_feature('blame');
4723        print "<div class=\"list_head\">\n";
4724        if ($#{$difftree} > 10) {
4725                print(($#{$difftree} + 1) . " files changed:\n");
4726        }
4727        print "</div>\n";
4728
4729        print "<table class=\"" .
4730              (@parents > 1 ? "combined " : "") .
4731              "diff_tree\">\n";
4732
4733        # header only for combined diff in 'commitdiff' view
4734        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4735        if ($has_header) {
4736                # table header
4737                print "<thead><tr>\n" .
4738                       "<th></th><th></th>\n"; # filename, patchN link
4739                for (my $i = 0; $i < @parents; $i++) {
4740                        my $par = $parents[$i];
4741                        print "<th>" .
4742                              $cgi->a({-href => href(action=>"commitdiff",
4743                                                     hash=>$hash, hash_parent=>$par),
4744                                       -title => 'commitdiff to parent number ' .
4745                                                  ($i+1) . ': ' . substr($par,0,7)},
4746                                      $i+1) .
4747                              "&nbsp;</th>\n";
4748                }
4749                print "</tr></thead>\n<tbody>\n";
4750        }
4751
4752        my $alternate = 1;
4753        my $patchno = 0;
4754        foreach my $line (@{$difftree}) {
4755                my $diff = parsed_difftree_line($line);
4756
4757                if ($alternate) {
4758                        print "<tr class=\"dark\">\n";
4759                } else {
4760                        print "<tr class=\"light\">\n";
4761                }
4762                $alternate ^= 1;
4763
4764                if (exists $diff->{'nparents'}) { # combined diff
4765
4766                        fill_from_file_info($diff, @parents)
4767                                unless exists $diff->{'from_file'};
4768
4769                        if (!is_deleted($diff)) {
4770                                # file exists in the result (child) commit
4771                                print "<td>" .
4772                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4773                                                             file_name=>$diff->{'to_file'},
4774                                                             hash_base=>$hash),
4775                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4776                                      "</td>\n";
4777                        } else {
4778                                print "<td>" .
4779                                      esc_path($diff->{'to_file'}) .
4780                                      "</td>\n";
4781                        }
4782
4783                        if ($action eq 'commitdiff') {
4784                                # link to patch
4785                                $patchno++;
4786                                print "<td class=\"link\">" .
4787                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4788                                              "patch") .
4789                                      " | " .
4790                                      "</td>\n";
4791                        }
4792
4793                        my $has_history = 0;
4794                        my $not_deleted = 0;
4795                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4796                                my $hash_parent = $parents[$i];
4797                                my $from_hash = $diff->{'from_id'}[$i];
4798                                my $from_path = $diff->{'from_file'}[$i];
4799                                my $status = $diff->{'status'}[$i];
4800
4801                                $has_history ||= ($status ne 'A');
4802                                $not_deleted ||= ($status ne 'D');
4803
4804                                if ($status eq 'A') {
4805                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4806                                } elsif ($status eq 'D') {
4807                                        print "<td class=\"link\">" .
4808                                              $cgi->a({-href => href(action=>"blob",
4809                                                                     hash_base=>$hash,
4810                                                                     hash=>$from_hash,
4811                                                                     file_name=>$from_path)},
4812                                                      "blob" . ($i+1)) .
4813                                              " | </td>\n";
4814                                } else {
4815                                        if ($diff->{'to_id'} eq $from_hash) {
4816                                                print "<td class=\"link nochange\">";
4817                                        } else {
4818                                                print "<td class=\"link\">";
4819                                        }
4820                                        print $cgi->a({-href => href(action=>"blobdiff",
4821                                                                     hash=>$diff->{'to_id'},
4822                                                                     hash_parent=>$from_hash,
4823                                                                     hash_base=>$hash,
4824                                                                     hash_parent_base=>$hash_parent,
4825                                                                     file_name=>$diff->{'to_file'},
4826                                                                     file_parent=>$from_path)},
4827                                                      "diff" . ($i+1)) .
4828                                              " | </td>\n";
4829                                }
4830                        }
4831
4832                        print "<td class=\"link\">";
4833                        if ($not_deleted) {
4834                                print $cgi->a({-href => href(action=>"blob",
4835                                                             hash=>$diff->{'to_id'},
4836                                                             file_name=>$diff->{'to_file'},
4837                                                             hash_base=>$hash)},
4838                                              "blob");
4839                                print " | " if ($has_history);
4840                        }
4841                        if ($has_history) {
4842                                print $cgi->a({-href => href(action=>"history",
4843                                                             file_name=>$diff->{'to_file'},
4844                                                             hash_base=>$hash)},
4845                                              "history");
4846                        }
4847                        print "</td>\n";
4848
4849                        print "</tr>\n";
4850                        next; # instead of 'else' clause, to avoid extra indent
4851                }
4852                # else ordinary diff
4853
4854                my ($to_mode_oct, $to_mode_str, $to_file_type);
4855                my ($from_mode_oct, $from_mode_str, $from_file_type);
4856                if ($diff->{'to_mode'} ne ('0' x 6)) {
4857                        $to_mode_oct = oct $diff->{'to_mode'};
4858                        if (S_ISREG($to_mode_oct)) { # only for regular file
4859                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4860                        }
4861                        $to_file_type = file_type($diff->{'to_mode'});
4862                }
4863                if ($diff->{'from_mode'} ne ('0' x 6)) {
4864                        $from_mode_oct = oct $diff->{'from_mode'};
4865                        if (S_ISREG($from_mode_oct)) { # only for regular file
4866                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4867                        }
4868                        $from_file_type = file_type($diff->{'from_mode'});
4869                }
4870
4871                if ($diff->{'status'} eq "A") { # created
4872                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4873                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4874                        $mode_chng   .= "]</span>";
4875                        print "<td>";
4876                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4877                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4878                                      -class => "list"}, esc_path($diff->{'file'}));
4879                        print "</td>\n";
4880                        print "<td>$mode_chng</td>\n";
4881                        print "<td class=\"link\">";
4882                        if ($action eq 'commitdiff') {
4883                                # link to patch
4884                                $patchno++;
4885                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4886                                              "patch") .
4887                                      " | ";
4888                        }
4889                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4890                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4891                                      "blob");
4892                        print "</td>\n";
4893
4894                } elsif ($diff->{'status'} eq "D") { # deleted
4895                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4896                        print "<td>";
4897                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4898                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4899                                       -class => "list"}, esc_path($diff->{'file'}));
4900                        print "</td>\n";
4901                        print "<td>$mode_chng</td>\n";
4902                        print "<td class=\"link\">";
4903                        if ($action eq 'commitdiff') {
4904                                # link to patch
4905                                $patchno++;
4906                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4907                                              "patch") .
4908                                      " | ";
4909                        }
4910                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4911                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4912                                      "blob") . " | ";
4913                        if ($have_blame) {
4914                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4915                                                             file_name=>$diff->{'file'})},
4916                                              "blame") . " | ";
4917                        }
4918                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4919                                                     file_name=>$diff->{'file'})},
4920                                      "history");
4921                        print "</td>\n";
4922
4923                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4924                        my $mode_chnge = "";
4925                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4926                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4927                                if ($from_file_type ne $to_file_type) {
4928                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4929                                }
4930                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4931                                        if ($from_mode_str && $to_mode_str) {
4932                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4933                                        } elsif ($to_mode_str) {
4934                                                $mode_chnge .= " mode: $to_mode_str";
4935                                        }
4936                                }
4937                                $mode_chnge .= "]</span>\n";
4938                        }
4939                        print "<td>";
4940                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4941                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4942                                      -class => "list"}, esc_path($diff->{'file'}));
4943                        print "</td>\n";
4944                        print "<td>$mode_chnge</td>\n";
4945                        print "<td class=\"link\">";
4946                        if ($action eq 'commitdiff') {
4947                                # link to patch
4948                                $patchno++;
4949                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4950                                              "patch") .
4951                                      " | ";
4952                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4953                                # "commit" view and modified file (not onlu mode changed)
4954                                print $cgi->a({-href => href(action=>"blobdiff",
4955                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4956                                                             hash_base=>$hash, hash_parent_base=>$parent,
4957                                                             file_name=>$diff->{'file'})},
4958                                              "diff") .
4959                                      " | ";
4960                        }
4961                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4962                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4963                                       "blob") . " | ";
4964                        if ($have_blame) {
4965                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4966                                                             file_name=>$diff->{'file'})},
4967                                              "blame") . " | ";
4968                        }
4969                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4970                                                     file_name=>$diff->{'file'})},
4971                                      "history");
4972                        print "</td>\n";
4973
4974                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4975                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4976                        my $nstatus = $status_name{$diff->{'status'}};
4977                        my $mode_chng = "";
4978                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4979                                # mode also for directories, so we cannot use $to_mode_str
4980                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4981                        }
4982                        print "<td>" .
4983                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4984                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4985                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4986                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4987                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4988                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4989                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4990                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4991                              "<td class=\"link\">";
4992                        if ($action eq 'commitdiff') {
4993                                # link to patch
4994                                $patchno++;
4995                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4996                                              "patch") .
4997                                      " | ";
4998                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4999                                # "commit" view and modified file (not only pure rename or copy)
5000                                print $cgi->a({-href => href(action=>"blobdiff",
5001                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5002                                                             hash_base=>$hash, hash_parent_base=>$parent,
5003                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5004                                              "diff") .
5005                                      " | ";
5006                        }
5007                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5008                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5009                                      "blob") . " | ";
5010                        if ($have_blame) {
5011                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5012                                                             file_name=>$diff->{'to_file'})},
5013                                              "blame") . " | ";
5014                        }
5015                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5016                                                    file_name=>$diff->{'to_file'})},
5017                                      "history");
5018                        print "</td>\n";
5019
5020                } # we should not encounter Unmerged (U) or Unknown (X) status
5021                print "</tr>\n";
5022        }
5023        print "</tbody>" if $has_header;
5024        print "</table>\n";
5025}
5026
5027# Print context lines and then rem/add lines in a side-by-side manner.
5028sub print_sidebyside_diff_lines {
5029        my ($ctx, $rem, $add) = @_;
5030
5031        # print context block before add/rem block
5032        if (@$ctx) {
5033                print join '',
5034                        '<div class="chunk_block ctx">',
5035                                '<div class="old">',
5036                                @$ctx,
5037                                '</div>',
5038                                '<div class="new">',
5039                                @$ctx,
5040                                '</div>',
5041                        '</div>';
5042        }
5043
5044        if (!@$add) {
5045                # pure removal
5046                print join '',
5047                        '<div class="chunk_block rem">',
5048                                '<div class="old">',
5049                                @$rem,
5050                                '</div>',
5051                        '</div>';
5052        } elsif (!@$rem) {
5053                # pure addition
5054                print join '',
5055                        '<div class="chunk_block add">',
5056                                '<div class="new">',
5057                                @$add,
5058                                '</div>',
5059                        '</div>';
5060        } else {
5061                print join '',
5062                        '<div class="chunk_block chg">',
5063                                '<div class="old">',
5064                                @$rem,
5065                                '</div>',
5066                                '<div class="new">',
5067                                @$add,
5068                                '</div>',
5069                        '</div>';
5070        }
5071}
5072
5073# Print context lines and then rem/add lines in inline manner.
5074sub print_inline_diff_lines {
5075        my ($ctx, $rem, $add) = @_;
5076
5077        print @$ctx, @$rem, @$add;
5078}
5079
5080# Format removed and added line, mark changed part and HTML-format them.
5081# Implementation is based on contrib/diff-highlight
5082sub format_rem_add_lines_pair {
5083        my ($rem, $add, $num_parents) = @_;
5084
5085        # We need to untabify lines before split()'ing them;
5086        # otherwise offsets would be invalid.
5087        chomp $rem;
5088        chomp $add;
5089        $rem = untabify($rem);
5090        $add = untabify($add);
5091
5092        my @rem = split(//, $rem);
5093        my @add = split(//, $add);
5094        my ($esc_rem, $esc_add);
5095        # Ignore leading +/- characters for each parent.
5096        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5097        my ($prefix_has_nonspace, $suffix_has_nonspace);
5098
5099        my $shorter = (@rem < @add) ? @rem : @add;
5100        while ($prefix_len < $shorter) {
5101                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5102
5103                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5104                $prefix_len++;
5105        }
5106
5107        while ($prefix_len + $suffix_len < $shorter) {
5108                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5109
5110                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5111                $suffix_len++;
5112        }
5113
5114        # Mark lines that are different from each other, but have some common
5115        # part that isn't whitespace.  If lines are completely different, don't
5116        # mark them because that would make output unreadable, especially if
5117        # diff consists of multiple lines.
5118        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5119                $esc_rem = esc_html_hl_regions($rem, 'marked',
5120                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5121                $esc_add = esc_html_hl_regions($add, 'marked',
5122                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5123        } else {
5124                $esc_rem = esc_html($rem, -nbsp=>1);
5125                $esc_add = esc_html($add, -nbsp=>1);
5126        }
5127
5128        return format_diff_line(\$esc_rem, 'rem'),
5129               format_diff_line(\$esc_add, 'add');
5130}
5131
5132# HTML-format diff context, removed and added lines.
5133sub format_ctx_rem_add_lines {
5134        my ($ctx, $rem, $add, $num_parents) = @_;
5135        my (@new_ctx, @new_rem, @new_add);
5136        my $can_highlight = 0;
5137        my $is_combined = ($num_parents > 1);
5138
5139        # Highlight if every removed line has a corresponding added line.
5140        if (@$add > 0 && @$add == @$rem) {
5141                $can_highlight = 1;
5142
5143                # Highlight lines in combined diff only if the chunk contains
5144                # diff between the same version, e.g.
5145                #
5146                #    - a
5147                #   -  b
5148                #    + c
5149                #   +  d
5150                #
5151                # Otherwise the highlightling would be confusing.
5152                if ($is_combined) {
5153                        for (my $i = 0; $i < @$add; $i++) {
5154                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5155                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5156
5157                                $prefix_rem =~ s/-/+/g;
5158
5159                                if ($prefix_rem ne $prefix_add) {
5160                                        $can_highlight = 0;
5161                                        last;
5162                                }
5163                        }
5164                }
5165        }
5166
5167        if ($can_highlight) {
5168                for (my $i = 0; $i < @$add; $i++) {
5169                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5170                                $rem->[$i], $add->[$i], $num_parents);
5171                        push @new_rem, $line_rem;
5172                        push @new_add, $line_add;
5173                }
5174        } else {
5175                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5176                @new_add = map { format_diff_line($_, 'add') } @$add;
5177        }
5178
5179        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5180
5181        return (\@new_ctx, \@new_rem, \@new_add);
5182}
5183
5184# Print context lines and then rem/add lines.
5185sub print_diff_lines {
5186        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5187        my $is_combined = $num_parents > 1;
5188
5189        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5190                $num_parents);
5191
5192        if ($diff_style eq 'sidebyside' && !$is_combined) {
5193                print_sidebyside_diff_lines($ctx, $rem, $add);
5194        } else {
5195                # default 'inline' style and unknown styles
5196                print_inline_diff_lines($ctx, $rem, $add);
5197        }
5198}
5199
5200sub print_diff_chunk {
5201        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5202        my (@ctx, @rem, @add);
5203
5204        # The class of the previous line.
5205        my $prev_class = '';
5206
5207        return unless @chunk;
5208
5209        # incomplete last line might be among removed or added lines,
5210        # or both, or among context lines: find which
5211        for (my $i = 1; $i < @chunk; $i++) {
5212                if ($chunk[$i][0] eq 'incomplete') {
5213                        $chunk[$i][0] = $chunk[$i-1][0];
5214                }
5215        }
5216
5217        # guardian
5218        push @chunk, ["", ""];
5219
5220        foreach my $line_info (@chunk) {
5221                my ($class, $line) = @$line_info;
5222
5223                # print chunk headers
5224                if ($class && $class eq 'chunk_header') {
5225                        print format_diff_line($line, $class, $from, $to);
5226                        next;
5227                }
5228
5229                ## print from accumulator when have some add/rem lines or end
5230                # of chunk (flush context lines), or when have add and rem
5231                # lines and new block is reached (otherwise add/rem lines could
5232                # be reordered)
5233                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5234                    (@rem && @add && $class ne $prev_class)) {
5235                        print_diff_lines(\@ctx, \@rem, \@add,
5236                                         $diff_style, $num_parents);
5237                        @ctx = @rem = @add = ();
5238                }
5239
5240                ## adding lines to accumulator
5241                # guardian value
5242                last unless $line;
5243                # rem, add or change
5244                if ($class eq 'rem') {
5245                        push @rem, $line;
5246                } elsif ($class eq 'add') {
5247                        push @add, $line;
5248                }
5249                # context line
5250                if ($class eq 'ctx') {
5251                        push @ctx, $line;
5252                }
5253
5254                $prev_class = $class;
5255        }
5256}
5257
5258sub git_patchset_body {
5259        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5260        my ($hash_parent) = $hash_parents[0];
5261
5262        my $is_combined = (@hash_parents > 1);
5263        my $patch_idx = 0;
5264        my $patch_number = 0;
5265        my $patch_line;
5266        my $diffinfo;
5267        my $to_name;
5268        my (%from, %to);
5269        my @chunk; # for side-by-side diff
5270
5271        print "<div class=\"patchset\">\n";
5272
5273        # skip to first patch
5274        while ($patch_line = <$fd>) {
5275                chomp $patch_line;
5276
5277                last if ($patch_line =~ m/^diff /);
5278        }
5279
5280 PATCH:
5281        while ($patch_line) {
5282
5283                # parse "git diff" header line
5284                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5285                        # $1 is from_name, which we do not use
5286                        $to_name = unquote($2);
5287                        $to_name =~ s!^b/!!;
5288                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5289                        # $1 is 'cc' or 'combined', which we do not use
5290                        $to_name = unquote($2);
5291                } else {
5292                        $to_name = undef;
5293                }
5294
5295                # check if current patch belong to current raw line
5296                # and parse raw git-diff line if needed
5297                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5298                        # this is continuation of a split patch
5299                        print "<div class=\"patch cont\">\n";
5300                } else {
5301                        # advance raw git-diff output if needed
5302                        $patch_idx++ if defined $diffinfo;
5303
5304                        # read and prepare patch information
5305                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5306
5307                        # compact combined diff output can have some patches skipped
5308                        # find which patch (using pathname of result) we are at now;
5309                        if ($is_combined) {
5310                                while ($to_name ne $diffinfo->{'to_file'}) {
5311                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5312                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5313                                              "</div>\n";  # class="patch"
5314
5315                                        $patch_idx++;
5316                                        $patch_number++;
5317
5318                                        last if $patch_idx > $#$difftree;
5319                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5320                                }
5321                        }
5322
5323                        # modifies %from, %to hashes
5324                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5325
5326                        # this is first patch for raw difftree line with $patch_idx index
5327                        # we index @$difftree array from 0, but number patches from 1
5328                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5329                }
5330
5331                # git diff header
5332                #assert($patch_line =~ m/^diff /) if DEBUG;
5333                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5334                $patch_number++;
5335                # print "git diff" header
5336                print format_git_diff_header_line($patch_line, $diffinfo,
5337                                                  \%from, \%to);
5338
5339                # print extended diff header
5340                print "<div class=\"diff extended_header\">\n";
5341        EXTENDED_HEADER:
5342                while ($patch_line = <$fd>) {
5343                        chomp $patch_line;
5344
5345                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5346
5347                        print format_extended_diff_header_line($patch_line, $diffinfo,
5348                                                               \%from, \%to);
5349                }
5350                print "</div>\n"; # class="diff extended_header"
5351
5352                # from-file/to-file diff header
5353                if (! $patch_line) {
5354                        print "</div>\n"; # class="patch"
5355                        last PATCH;
5356                }
5357                next PATCH if ($patch_line =~ m/^diff /);
5358                #assert($patch_line =~ m/^---/) if DEBUG;
5359
5360                my $last_patch_line = $patch_line;
5361                $patch_line = <$fd>;
5362                chomp $patch_line;
5363                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5364
5365                print format_diff_from_to_header($last_patch_line, $patch_line,
5366                                                 $diffinfo, \%from, \%to,
5367                                                 @hash_parents);
5368
5369                # the patch itself
5370        LINE:
5371                while ($patch_line = <$fd>) {
5372                        chomp $patch_line;
5373
5374                        next PATCH if ($patch_line =~ m/^diff /);
5375
5376                        my $class = diff_line_class($patch_line, \%from, \%to);
5377
5378                        if ($class eq 'chunk_header') {
5379                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5380                                @chunk = ();
5381                        }
5382
5383                        push @chunk, [ $class, $patch_line ];
5384                }
5385
5386        } continue {
5387                if (@chunk) {
5388                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5389                        @chunk = ();
5390                }
5391                print "</div>\n"; # class="patch"
5392        }
5393
5394        # for compact combined (--cc) format, with chunk and patch simplification
5395        # the patchset might be empty, but there might be unprocessed raw lines
5396        for (++$patch_idx if $patch_number > 0;
5397             $patch_idx < @$difftree;
5398             ++$patch_idx) {
5399                # read and prepare patch information
5400                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5401
5402                # generate anchor for "patch" links in difftree / whatchanged part
5403                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5404                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5405                      "</div>\n";  # class="patch"
5406
5407                $patch_number++;
5408        }
5409
5410        if ($patch_number == 0) {
5411                if (@hash_parents > 1) {
5412                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5413                } else {
5414                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5415                }
5416        }
5417
5418        print "</div>\n"; # class="patchset"
5419}
5420
5421# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5422
5423sub git_project_search_form {
5424        my ($searchtext, $search_use_regexp) = @_;
5425
5426        my $limit = '';
5427        if ($project_filter) {
5428                $limit = " in '$project_filter/'";
5429        }
5430
5431        print "<div class=\"projsearch\">\n";
5432        print $cgi->startform(-method => 'get', -action => $my_uri) .
5433              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5434        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5435                if (defined $project_filter);
5436        print $cgi->textfield(-name => 's', -value => $searchtext,
5437                              -title => "Search project by name and description$limit",
5438                              -size => 60) . "\n" .
5439              "<span title=\"Extended regular expression\">" .
5440              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5441                             -checked => $search_use_regexp) .
5442              "</span>\n" .
5443              $cgi->submit(-name => 'btnS', -value => 'Search') .
5444              $cgi->end_form() . "\n" .
5445              $cgi->a({-href => href(project => undef, searchtext => undef,
5446                                     project_filter => $project_filter)},
5447                      esc_html("List all projects$limit")) . "<br />\n";
5448        print "</div>\n";
5449}
5450
5451# entry for given @keys needs filling if at least one of keys in list
5452# is not present in %$project_info
5453sub project_info_needs_filling {
5454        my ($project_info, @keys) = @_;
5455
5456        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5457        foreach my $key (@keys) {
5458                if (!exists $project_info->{$key}) {
5459                        return 1;
5460                }
5461        }
5462        return;
5463}
5464
5465# fills project list info (age, description, owner, category, forks, etc.)
5466# for each project in the list, removing invalid projects from
5467# returned list, or fill only specified info.
5468#
5469# Invalid projects are removed from the returned list if and only if you
5470# ask 'age' or 'age_string' to be filled, because they are the only fields
5471# that run unconditionally git command that requires repository, and
5472# therefore do always check if project repository is invalid.
5473#
5474# USAGE:
5475# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5476#   ensures that 'descr_long' and 'ctags' fields are filled
5477# * @project_list = fill_project_list_info(\@project_list)
5478#   ensures that all fields are filled (and invalid projects removed)
5479#
5480# NOTE: modifies $projlist, but does not remove entries from it
5481sub fill_project_list_info {
5482        my ($projlist, @wanted_keys) = @_;
5483        my @projects;
5484        my $filter_set = sub { return @_; };
5485        if (@wanted_keys) {
5486                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5487                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5488        }
5489
5490        my $show_ctags = gitweb_check_feature('ctags');
5491 PROJECT:
5492        foreach my $pr (@$projlist) {
5493                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5494                        my (@activity) = git_get_last_activity($pr->{'path'});
5495                        unless (@activity) {
5496                                next PROJECT;
5497                        }
5498                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5499                }
5500                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5501                        my $descr = git_get_project_description($pr->{'path'}) || "";
5502                        $descr = to_utf8($descr);
5503                        $pr->{'descr_long'} = $descr;
5504                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5505                }
5506                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5507                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5508                }
5509                if ($show_ctags &&
5510                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5511                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5512                }
5513                if ($projects_list_group_categories &&
5514                    project_info_needs_filling($pr, $filter_set->('category'))) {
5515                        my $cat = git_get_project_category($pr->{'path'}) ||
5516                                                           $project_list_default_category;
5517                        $pr->{'category'} = to_utf8($cat);
5518                }
5519
5520                push @projects, $pr;
5521        }
5522
5523        return @projects;
5524}
5525
5526sub sort_projects_list {
5527        my ($projlist, $order) = @_;
5528        my @projects;
5529
5530        my %order_info = (
5531                project => { key => 'path', type => 'str' },
5532                descr => { key => 'descr_long', type => 'str' },
5533                owner => { key => 'owner', type => 'str' },
5534                age => { key => 'age', type => 'num' }
5535        );
5536        my $oi = $order_info{$order};
5537        return @$projlist unless defined $oi;
5538        if ($oi->{'type'} eq 'str') {
5539                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5540        } else {
5541                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5542        }
5543
5544        return @projects;
5545}
5546
5547# returns a hash of categories, containing the list of project
5548# belonging to each category
5549sub build_projlist_by_category {
5550        my ($projlist, $from, $to) = @_;
5551        my %categories;
5552
5553        $from = 0 unless defined $from;
5554        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5555
5556        for (my $i = $from; $i <= $to; $i++) {
5557                my $pr = $projlist->[$i];
5558                push @{$categories{ $pr->{'category'} }}, $pr;
5559        }
5560
5561        return wantarray ? %categories : \%categories;
5562}
5563
5564# print 'sort by' <th> element, generating 'sort by $name' replay link
5565# if that order is not selected
5566sub print_sort_th {
5567        print format_sort_th(@_);
5568}
5569
5570sub format_sort_th {
5571        my ($name, $order, $header) = @_;
5572        my $sort_th = "";
5573        $header ||= ucfirst($name);
5574
5575        if ($order eq $name) {
5576                $sort_th .= "<th>$header</th>\n";
5577        } else {
5578                $sort_th .= "<th>" .
5579                            $cgi->a({-href => href(-replay=>1, order=>$name),
5580                                     -class => "header"}, $header) .
5581                            "</th>\n";
5582        }
5583
5584        return $sort_th;
5585}
5586
5587sub git_project_list_rows {
5588        my ($projlist, $from, $to, $check_forks) = @_;
5589
5590        $from = 0 unless defined $from;
5591        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5592
5593        my $alternate = 1;
5594        for (my $i = $from; $i <= $to; $i++) {
5595                my $pr = $projlist->[$i];
5596
5597                if ($alternate) {
5598                        print "<tr class=\"dark\">\n";
5599                } else {
5600                        print "<tr class=\"light\">\n";
5601                }
5602                $alternate ^= 1;
5603
5604                if ($check_forks) {
5605                        print "<td>";
5606                        if ($pr->{'forks'}) {
5607                                my $nforks = scalar @{$pr->{'forks'}};
5608                                if ($nforks > 0) {
5609                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5610                                                       -title => "$nforks forks"}, "+");
5611                                } else {
5612                                        print $cgi->span({-title => "$nforks forks"}, "+");
5613                                }
5614                        }
5615                        print "</td>\n";
5616                }
5617                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5618                                        -class => "list"},
5619                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5620                      "</td>\n" .
5621                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5622                                        -class => "list",
5623                                        -title => $pr->{'descr_long'}},
5624                                        $search_regexp
5625                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5626                                                                    $pr->{'descr'}, $search_regexp)
5627                                        : esc_html($pr->{'descr'})) .
5628                      "</td>\n";
5629                unless ($omit_owner) {
5630                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5631                }
5632                unless ($omit_age_column) {
5633                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5634                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5635                }
5636                print"<td class=\"link\">" .
5637                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5638                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5639                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5640                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5641                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5642                      "</td>\n" .
5643                      "</tr>\n";
5644        }
5645}
5646
5647sub git_project_list_body {
5648        # actually uses global variable $project
5649        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5650        my @projects = @$projlist;
5651
5652        my $check_forks = gitweb_check_feature('forks');
5653        my $show_ctags  = gitweb_check_feature('ctags');
5654        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5655        $check_forks = undef
5656                if ($tagfilter || $search_regexp);
5657
5658        # filtering out forks before filling info allows to do less work
5659        @projects = filter_forks_from_projects_list(\@projects)
5660                if ($check_forks);
5661        # search_projects_list pre-fills required info
5662        @projects = search_projects_list(\@projects,
5663                                         'search_regexp' => $search_regexp,
5664                                         'tagfilter'  => $tagfilter)
5665                if ($tagfilter || $search_regexp);
5666        # fill the rest
5667        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5668        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5669        push @all_fields, 'owner' unless($omit_owner);
5670        @projects = fill_project_list_info(\@projects, @all_fields);
5671
5672        $order ||= $default_projects_order;
5673        $from = 0 unless defined $from;
5674        $to = $#projects if (!defined $to || $#projects < $to);
5675
5676        # short circuit
5677        if ($from > $to) {
5678                print "<center>\n".
5679                      "<b>No such projects found</b><br />\n".
5680                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5681                      "</center>\n<br />\n";
5682                return;
5683        }
5684
5685        @projects = sort_projects_list(\@projects, $order);
5686
5687        if ($show_ctags) {
5688                my $ctags = git_gather_all_ctags(\@projects);
5689                my $cloud = git_populate_project_tagcloud($ctags);
5690                print git_show_project_tagcloud($cloud, 64);
5691        }
5692
5693        print "<table class=\"project_list\">\n";
5694        unless ($no_header) {
5695                print "<tr>\n";
5696                if ($check_forks) {
5697                        print "<th></th>\n";
5698                }
5699                print_sort_th('project', $order, 'Project');
5700                print_sort_th('descr', $order, 'Description');
5701                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5702                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5703                print "<th></th>\n" . # for links
5704                      "</tr>\n";
5705        }
5706
5707        if ($projects_list_group_categories) {
5708                # only display categories with projects in the $from-$to window
5709                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5710                my %categories = build_projlist_by_category(\@projects, $from, $to);
5711                foreach my $cat (sort keys %categories) {
5712                        unless ($cat eq "") {
5713                                print "<tr>\n";
5714                                if ($check_forks) {
5715                                        print "<td></td>\n";
5716                                }
5717                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5718                                print "</tr>\n";
5719                        }
5720
5721                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5722                }
5723        } else {
5724                git_project_list_rows(\@projects, $from, $to, $check_forks);
5725        }
5726
5727        if (defined $extra) {
5728                print "<tr>\n";
5729                if ($check_forks) {
5730                        print "<td></td>\n";
5731                }
5732                print "<td colspan=\"5\">$extra</td>\n" .
5733                      "</tr>\n";
5734        }
5735        print "</table>\n";
5736}
5737
5738sub git_log_body {
5739        # uses global variable $project
5740        my ($commitlist, $from, $to, $refs, $extra) = @_;
5741
5742        $from = 0 unless defined $from;
5743        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5744
5745        for (my $i = 0; $i <= $to; $i++) {
5746                my %co = %{$commitlist->[$i]};
5747                next if !%co;
5748                my $commit = $co{'id'};
5749                my $ref = format_ref_marker($refs, $commit);
5750                git_print_header_div('commit',
5751                               "<span class=\"age\">$co{'age_string'}</span>" .
5752                               esc_html($co{'title'}) . $ref,
5753                               $commit);
5754                print "<div class=\"title_text\">\n" .
5755                      "<div class=\"log_link\">\n" .
5756                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5757                      " | " .
5758                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5759                      " | " .
5760                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5761                      "<br/>\n" .
5762                      "</div>\n";
5763                      git_print_authorship(\%co, -tag => 'span');
5764                      print "<br/>\n</div>\n";
5765
5766                print "<div class=\"log_body\">\n";
5767                git_print_log($co{'comment'}, -final_empty_line=> 1);
5768                print "</div>\n";
5769        }
5770        if ($extra) {
5771                print "<div class=\"page_nav\">\n";
5772                print "$extra\n";
5773                print "</div>\n";
5774        }
5775}
5776
5777sub git_shortlog_body {
5778        # uses global variable $project
5779        my ($commitlist, $from, $to, $refs, $extra) = @_;
5780
5781        $from = 0 unless defined $from;
5782        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5783
5784        print "<table class=\"shortlog\">\n";
5785        my $alternate = 1;
5786        for (my $i = $from; $i <= $to; $i++) {
5787                my %co = %{$commitlist->[$i]};
5788                my $commit = $co{'id'};
5789                my $ref = format_ref_marker($refs, $commit);
5790                if ($alternate) {
5791                        print "<tr class=\"dark\">\n";
5792                } else {
5793                        print "<tr class=\"light\">\n";
5794                }
5795                $alternate ^= 1;
5796                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5797                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5798                      format_author_html('td', \%co, 10) . "<td>";
5799                print format_subject_html($co{'title'}, $co{'title_short'},
5800                                          href(action=>"commit", hash=>$commit), $ref);
5801                print "</td>\n" .
5802                      "<td class=\"link\">" .
5803                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5804                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5805                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5806                my $snapshot_links = format_snapshot_links($commit);
5807                if (defined $snapshot_links) {
5808                        print " | " . $snapshot_links;
5809                }
5810                print "</td>\n" .
5811                      "</tr>\n";
5812        }
5813        if (defined $extra) {
5814                print "<tr>\n" .
5815                      "<td colspan=\"4\">$extra</td>\n" .
5816                      "</tr>\n";
5817        }
5818        print "</table>\n";
5819}
5820
5821sub git_history_body {
5822        # Warning: assumes constant type (blob or tree) during history
5823        my ($commitlist, $from, $to, $refs, $extra,
5824            $file_name, $file_hash, $ftype) = @_;
5825
5826        $from = 0 unless defined $from;
5827        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5828
5829        print "<table class=\"history\">\n";
5830        my $alternate = 1;
5831        for (my $i = $from; $i <= $to; $i++) {
5832                my %co = %{$commitlist->[$i]};
5833                if (!%co) {
5834                        next;
5835                }
5836                my $commit = $co{'id'};
5837
5838                my $ref = format_ref_marker($refs, $commit);
5839
5840                if ($alternate) {
5841                        print "<tr class=\"dark\">\n";
5842                } else {
5843                        print "<tr class=\"light\">\n";
5844                }
5845                $alternate ^= 1;
5846                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5847        # shortlog:   format_author_html('td', \%co, 10)
5848                      format_author_html('td', \%co, 15, 3) . "<td>";
5849                # originally git_history used chop_str($co{'title'}, 50)
5850                print format_subject_html($co{'title'}, $co{'title_short'},
5851                                          href(action=>"commit", hash=>$commit), $ref);
5852                print "</td>\n" .
5853                      "<td class=\"link\">" .
5854                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5855                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5856
5857                if ($ftype eq 'blob') {
5858                        my $blob_current = $file_hash;
5859                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5860                        if (defined $blob_current && defined $blob_parent &&
5861                                        $blob_current ne $blob_parent) {
5862                                print " | " .
5863                                        $cgi->a({-href => href(action=>"blobdiff",
5864                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5865                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5866                                                               file_name=>$file_name)},
5867                                                "diff to current");
5868                        }
5869                }
5870                print "</td>\n" .
5871                      "</tr>\n";
5872        }
5873        if (defined $extra) {
5874                print "<tr>\n" .
5875                      "<td colspan=\"4\">$extra</td>\n" .
5876                      "</tr>\n";
5877        }
5878        print "</table>\n";
5879}
5880
5881sub git_tags_body {
5882        # uses global variable $project
5883        my ($taglist, $from, $to, $extra) = @_;
5884        $from = 0 unless defined $from;
5885        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5886
5887        print "<table class=\"tags\">\n";
5888        my $alternate = 1;
5889        for (my $i = $from; $i <= $to; $i++) {
5890                my $entry = $taglist->[$i];
5891                my %tag = %$entry;
5892                my $comment = $tag{'subject'};
5893                my $comment_short;
5894                if (defined $comment) {
5895                        $comment_short = chop_str($comment, 30, 5);
5896                }
5897                if ($alternate) {
5898                        print "<tr class=\"dark\">\n";
5899                } else {
5900                        print "<tr class=\"light\">\n";
5901                }
5902                $alternate ^= 1;
5903                if (defined $tag{'age'}) {
5904                        print "<td><i>$tag{'age'}</i></td>\n";
5905                } else {
5906                        print "<td></td>\n";
5907                }
5908                print "<td>" .
5909                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5910                               -class => "list name"}, esc_html($tag{'name'})) .
5911                      "</td>\n" .
5912                      "<td>";
5913                if (defined $comment) {
5914                        print format_subject_html($comment, $comment_short,
5915                                                  href(action=>"tag", hash=>$tag{'id'}));
5916                }
5917                print "</td>\n" .
5918                      "<td class=\"selflink\">";
5919                if ($tag{'type'} eq "tag") {
5920                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5921                } else {
5922                        print "&nbsp;";
5923                }
5924                print "</td>\n" .
5925                      "<td class=\"link\">" . " | " .
5926                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5927                if ($tag{'reftype'} eq "commit") {
5928                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5929                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5930                } elsif ($tag{'reftype'} eq "blob") {
5931                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5932                }
5933                print "</td>\n" .
5934                      "</tr>";
5935        }
5936        if (defined $extra) {
5937                print "<tr>\n" .
5938                      "<td colspan=\"5\">$extra</td>\n" .
5939                      "</tr>\n";
5940        }
5941        print "</table>\n";
5942}
5943
5944sub git_heads_body {
5945        # uses global variable $project
5946        my ($headlist, $head_at, $from, $to, $extra) = @_;
5947        $from = 0 unless defined $from;
5948        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5949
5950        print "<table class=\"heads\">\n";
5951        my $alternate = 1;
5952        for (my $i = $from; $i <= $to; $i++) {
5953                my $entry = $headlist->[$i];
5954                my %ref = %$entry;
5955                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5956                if ($alternate) {
5957                        print "<tr class=\"dark\">\n";
5958                } else {
5959                        print "<tr class=\"light\">\n";
5960                }
5961                $alternate ^= 1;
5962                print "<td><i>$ref{'age'}</i></td>\n" .
5963                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5964                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5965                               -class => "list name"},esc_html($ref{'name'})) .
5966                      "</td>\n" .
5967                      "<td class=\"link\">" .
5968                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5969                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5970                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5971                      "</td>\n" .
5972                      "</tr>";
5973        }
5974        if (defined $extra) {
5975                print "<tr>\n" .
5976                      "<td colspan=\"3\">$extra</td>\n" .
5977                      "</tr>\n";
5978        }
5979        print "</table>\n";
5980}
5981
5982# Display a single remote block
5983sub git_remote_block {
5984        my ($remote, $rdata, $limit, $head) = @_;
5985
5986        my $heads = $rdata->{'heads'};
5987        my $fetch = $rdata->{'fetch'};
5988        my $push = $rdata->{'push'};
5989
5990        my $urls_table = "<table class=\"projects_list\">\n" ;
5991
5992        if (defined $fetch) {
5993                if ($fetch eq $push) {
5994                        $urls_table .= format_repo_url("URL", $fetch);
5995                } else {
5996                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5997                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5998                }
5999        } elsif (defined $push) {
6000                $urls_table .= format_repo_url("Push URL", $push);
6001        } else {
6002                $urls_table .= format_repo_url("", "No remote URL");
6003        }
6004
6005        $urls_table .= "</table>\n";
6006
6007        my $dots;
6008        if (defined $limit && $limit < @$heads) {
6009                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6010        }
6011
6012        print $urls_table;
6013        git_heads_body($heads, $head, 0, $limit, $dots);
6014}
6015
6016# Display a list of remote names with the respective fetch and push URLs
6017sub git_remotes_list {
6018        my ($remotedata, $limit) = @_;
6019        print "<table class=\"heads\">\n";
6020        my $alternate = 1;
6021        my @remotes = sort keys %$remotedata;
6022
6023        my $limited = $limit && $limit < @remotes;
6024
6025        $#remotes = $limit - 1 if $limited;
6026
6027        while (my $remote = shift @remotes) {
6028                my $rdata = $remotedata->{$remote};
6029                my $fetch = $rdata->{'fetch'};
6030                my $push = $rdata->{'push'};
6031                if ($alternate) {
6032                        print "<tr class=\"dark\">\n";
6033                } else {
6034                        print "<tr class=\"light\">\n";
6035                }
6036                $alternate ^= 1;
6037                print "<td>" .
6038                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6039                               -class=> "list name"},esc_html($remote)) .
6040                      "</td>";
6041                print "<td class=\"link\">" .
6042                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6043                      " | " .
6044                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6045                      "</td>";
6046
6047                print "</tr>\n";
6048        }
6049
6050        if ($limited) {
6051                print "<tr>\n" .
6052                      "<td colspan=\"3\">" .
6053                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6054                      "</td>\n" . "</tr>\n";
6055        }
6056
6057        print "</table>";
6058}
6059
6060# Display remote heads grouped by remote, unless there are too many
6061# remotes, in which case we only display the remote names
6062sub git_remotes_body {
6063        my ($remotedata, $limit, $head) = @_;
6064        if ($limit and $limit < keys %$remotedata) {
6065                git_remotes_list($remotedata, $limit);
6066        } else {
6067                fill_remote_heads($remotedata);
6068                while (my ($remote, $rdata) = each %$remotedata) {
6069                        git_print_section({-class=>"remote", -id=>$remote},
6070                                ["remotes", $remote, $remote], sub {
6071                                        git_remote_block($remote, $rdata, $limit, $head);
6072                                });
6073                }
6074        }
6075}
6076
6077sub git_search_message {
6078        my %co = @_;
6079
6080        my $greptype;
6081        if ($searchtype eq 'commit') {
6082                $greptype = "--grep=";
6083        } elsif ($searchtype eq 'author') {
6084                $greptype = "--author=";
6085        } elsif ($searchtype eq 'committer') {
6086                $greptype = "--committer=";
6087        }
6088        $greptype .= $searchtext;
6089        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6090                                       $greptype, '--regexp-ignore-case',
6091                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6092
6093        my $paging_nav = '';
6094        if ($page > 0) {
6095                $paging_nav .=
6096                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6097                                "first") .
6098                        " &sdot; " .
6099                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6100                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6101        } else {
6102                $paging_nav .= "first &sdot; prev";
6103        }
6104        my $next_link = '';
6105        if ($#commitlist >= 100) {
6106                $next_link =
6107                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6108                                 -accesskey => "n", -title => "Alt-n"}, "next");
6109                $paging_nav .= " &sdot; $next_link";
6110        } else {
6111                $paging_nav .= " &sdot; next";
6112        }
6113
6114        git_header_html();
6115
6116        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6117        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6118        if ($page == 0 && !@commitlist) {
6119                print "<p>No match.</p>\n";
6120        } else {
6121                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6122        }
6123
6124        git_footer_html();
6125}
6126
6127sub git_search_changes {
6128        my %co = @_;
6129
6130        local $/ = "\n";
6131        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6132                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6133                ($search_use_regexp ? '--pickaxe-regex' : ())
6134                        or die_error(500, "Open git-log failed");
6135
6136        git_header_html();
6137
6138        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6139        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6140
6141        print "<table class=\"pickaxe search\">\n";
6142        my $alternate = 1;
6143        undef %co;
6144        my @files;
6145        while (my $line = <$fd>) {
6146                chomp $line;
6147                next unless $line;
6148
6149                my %set = parse_difftree_raw_line($line);
6150                if (defined $set{'commit'}) {
6151                        # finish previous commit
6152                        if (%co) {
6153                                print "</td>\n" .
6154                                      "<td class=\"link\">" .
6155                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6156                                              "commit") .
6157                                      " | " .
6158                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6159                                                             hash_base=>$co{'id'})},
6160                                              "tree") .
6161                                      "</td>\n" .
6162                                      "</tr>\n";
6163                        }
6164
6165                        if ($alternate) {
6166                                print "<tr class=\"dark\">\n";
6167                        } else {
6168                                print "<tr class=\"light\">\n";
6169                        }
6170                        $alternate ^= 1;
6171                        %co = parse_commit($set{'commit'});
6172                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6173                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6174                              "<td><i>$author</i></td>\n" .
6175                              "<td>" .
6176                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6177                                      -class => "list subject"},
6178                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6179                } elsif (defined $set{'to_id'}) {
6180                        next if ($set{'to_id'} =~ m/^0{40}$/);
6181
6182                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6183                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6184                                      -class => "list"},
6185                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6186                              "<br/>\n";
6187                }
6188        }
6189        close $fd;
6190
6191        # finish last commit (warning: repetition!)
6192        if (%co) {
6193                print "</td>\n" .
6194                      "<td class=\"link\">" .
6195                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6196                              "commit") .
6197                      " | " .
6198                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6199                                             hash_base=>$co{'id'})},
6200                              "tree") .
6201                      "</td>\n" .
6202                      "</tr>\n";
6203        }
6204
6205        print "</table>\n";
6206
6207        git_footer_html();
6208}
6209
6210sub git_search_files {
6211        my %co = @_;
6212
6213        local $/ = "\n";
6214        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6215                $search_use_regexp ? ('-E', '-i') : '-F',
6216                $searchtext, $co{'tree'}
6217                        or die_error(500, "Open git-grep failed");
6218
6219        git_header_html();
6220
6221        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6222        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6223
6224        print "<table class=\"grep_search\">\n";
6225        my $alternate = 1;
6226        my $matches = 0;
6227        my $lastfile = '';
6228        my $file_href;
6229        while (my $line = <$fd>) {
6230                chomp $line;
6231                my ($file, $lno, $ltext, $binary);
6232                last if ($matches++ > 1000);
6233                if ($line =~ /^Binary file (.+) matches$/) {
6234                        $file = $1;
6235                        $binary = 1;
6236                } else {
6237                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6238                        $file =~ s/^$co{'tree'}://;
6239                }
6240                if ($file ne $lastfile) {
6241                        $lastfile and print "</td></tr>\n";
6242                        if ($alternate++) {
6243                                print "<tr class=\"dark\">\n";
6244                        } else {
6245                                print "<tr class=\"light\">\n";
6246                        }
6247                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6248                                          file_name=>$file);
6249                        print "<td class=\"list\">".
6250                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6251                        print "</td><td>\n";
6252                        $lastfile = $file;
6253                }
6254                if ($binary) {
6255                        print "<div class=\"binary\">Binary file</div>\n";
6256                } else {
6257                        $ltext = untabify($ltext);
6258                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6259                                $ltext = esc_html($1, -nbsp=>1);
6260                                $ltext .= '<span class="match">';
6261                                $ltext .= esc_html($2, -nbsp=>1);
6262                                $ltext .= '</span>';
6263                                $ltext .= esc_html($3, -nbsp=>1);
6264                        } else {
6265                                $ltext = esc_html($ltext, -nbsp=>1);
6266                        }
6267                        print "<div class=\"pre\">" .
6268                                $cgi->a({-href => $file_href.'#l'.$lno,
6269                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6270                                ' ' .  $ltext . "</div>\n";
6271                }
6272        }
6273        if ($lastfile) {
6274                print "</td></tr>\n";
6275                if ($matches > 1000) {
6276                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6277                }
6278        } else {
6279                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6280        }
6281        close $fd;
6282
6283        print "</table>\n";
6284
6285        git_footer_html();
6286}
6287
6288sub git_search_grep_body {
6289        my ($commitlist, $from, $to, $extra) = @_;
6290        $from = 0 unless defined $from;
6291        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6292
6293        print "<table class=\"commit_search\">\n";
6294        my $alternate = 1;
6295        for (my $i = $from; $i <= $to; $i++) {
6296                my %co = %{$commitlist->[$i]};
6297                if (!%co) {
6298                        next;
6299                }
6300                my $commit = $co{'id'};
6301                if ($alternate) {
6302                        print "<tr class=\"dark\">\n";
6303                } else {
6304                        print "<tr class=\"light\">\n";
6305                }
6306                $alternate ^= 1;
6307                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6308                      format_author_html('td', \%co, 15, 5) .
6309                      "<td>" .
6310                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6311                               -class => "list subject"},
6312                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6313                my $comment = $co{'comment'};
6314                foreach my $line (@$comment) {
6315                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6316                                my ($lead, $match, $trail) = ($1, $2, $3);
6317                                $match = chop_str($match, 70, 5, 'center');
6318                                my $contextlen = int((80 - length($match))/2);
6319                                $contextlen = 30 if ($contextlen > 30);
6320                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6321                                $trail = chop_str($trail, $contextlen, 10, 'right');
6322
6323                                $lead  = esc_html($lead);
6324                                $match = esc_html($match);
6325                                $trail = esc_html($trail);
6326
6327                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6328                        }
6329                }
6330                print "</td>\n" .
6331                      "<td class=\"link\">" .
6332                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6333                      " | " .
6334                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6335                      " | " .
6336                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6337                print "</td>\n" .
6338                      "</tr>\n";
6339        }
6340        if (defined $extra) {
6341                print "<tr>\n" .
6342                      "<td colspan=\"3\">$extra</td>\n" .
6343                      "</tr>\n";
6344        }
6345        print "</table>\n";
6346}
6347
6348## ======================================================================
6349## ======================================================================
6350## actions
6351
6352sub git_project_list {
6353        my $order = $input_params{'order'};
6354        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6355                die_error(400, "Unknown order parameter");
6356        }
6357
6358        my @list = git_get_projects_list($project_filter, $strict_export);
6359        if (!@list) {
6360                die_error(404, "No projects found");
6361        }
6362
6363        git_header_html();
6364        if (defined $home_text && -f $home_text) {
6365                print "<div class=\"index_include\">\n";
6366                insert_file($home_text);
6367                print "</div>\n";
6368        }
6369
6370        git_project_search_form($searchtext, $search_use_regexp);
6371        git_project_list_body(\@list, $order);
6372        git_footer_html();
6373}
6374
6375sub git_forks {
6376        my $order = $input_params{'order'};
6377        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6378                die_error(400, "Unknown order parameter");
6379        }
6380
6381        my $filter = $project;
6382        $filter =~ s/\.git$//;
6383        my @list = git_get_projects_list($filter);
6384        if (!@list) {
6385                die_error(404, "No forks found");
6386        }
6387
6388        git_header_html();
6389        git_print_page_nav('','');
6390        git_print_header_div('summary', "$project forks");
6391        git_project_list_body(\@list, $order);
6392        git_footer_html();
6393}
6394
6395sub git_project_index {
6396        my @projects = git_get_projects_list($project_filter, $strict_export);
6397        if (!@projects) {
6398                die_error(404, "No projects found");
6399        }
6400
6401        print $cgi->header(
6402                -type => 'text/plain',
6403                -charset => 'utf-8',
6404                -content_disposition => 'inline; filename="index.aux"');
6405
6406        foreach my $pr (@projects) {
6407                if (!exists $pr->{'owner'}) {
6408                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6409                }
6410
6411                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6412                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6413                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6414                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6415                $path  =~ s/ /\+/g;
6416                $owner =~ s/ /\+/g;
6417
6418                print "$path $owner\n";
6419        }
6420}
6421
6422sub git_summary {
6423        my $descr = git_get_project_description($project) || "none";
6424        my %co = parse_commit("HEAD");
6425        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6426        my $head = $co{'id'};
6427        my $remote_heads = gitweb_check_feature('remote_heads');
6428
6429        my $owner = git_get_project_owner($project);
6430
6431        my $refs = git_get_references();
6432        # These get_*_list functions return one more to allow us to see if
6433        # there are more ...
6434        my @taglist  = git_get_tags_list(16);
6435        my @headlist = git_get_heads_list(16);
6436        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6437        my @forklist;
6438        my $check_forks = gitweb_check_feature('forks');
6439
6440        if ($check_forks) {
6441                # find forks of a project
6442                my $filter = $project;
6443                $filter =~ s/\.git$//;
6444                @forklist = git_get_projects_list($filter);
6445                # filter out forks of forks
6446                @forklist = filter_forks_from_projects_list(\@forklist)
6447                        if (@forklist);
6448        }
6449
6450        git_header_html();
6451        git_print_page_nav('summary','', $head);
6452
6453        print "<div class=\"title\">&nbsp;</div>\n";
6454        print "<table class=\"projects_list\">\n" .
6455              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6456        unless ($omit_owner) {
6457                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6458        }
6459        if (defined $cd{'rfc2822'}) {
6460                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6461                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6462        }
6463
6464        # use per project git URL list in $projectroot/$project/cloneurl
6465        # or make project git URL from git base URL and project name
6466        my $url_tag = "URL";
6467        my @url_list = git_get_project_url_list($project);
6468        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6469        foreach my $git_url (@url_list) {
6470                next unless $git_url;
6471                print format_repo_url($url_tag, $git_url);
6472                $url_tag = "";
6473        }
6474
6475        # Tag cloud
6476        my $show_ctags = gitweb_check_feature('ctags');
6477        if ($show_ctags) {
6478                my $ctags = git_get_project_ctags($project);
6479                if (%$ctags) {
6480                        # without ability to add tags, don't show if there are none
6481                        my $cloud = git_populate_project_tagcloud($ctags);
6482                        print "<tr id=\"metadata_ctags\">" .
6483                              "<td>content tags</td>" .
6484                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6485                              "</tr>\n";
6486                }
6487        }
6488
6489        print "</table>\n";
6490
6491        # If XSS prevention is on, we don't include README.html.
6492        # TODO: Allow a readme in some safe format.
6493        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6494                print "<div class=\"title\">readme</div>\n" .
6495                      "<div class=\"readme\">\n";
6496                insert_file("$projectroot/$project/README.html");
6497                print "\n</div>\n"; # class="readme"
6498        }
6499
6500        # we need to request one more than 16 (0..15) to check if
6501        # those 16 are all
6502        my @commitlist = $head ? parse_commits($head, 17) : ();
6503        if (@commitlist) {
6504                git_print_header_div('shortlog');
6505                git_shortlog_body(\@commitlist, 0, 15, $refs,
6506                                  $#commitlist <=  15 ? undef :
6507                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6508        }
6509
6510        if (@taglist) {
6511                git_print_header_div('tags');
6512                git_tags_body(\@taglist, 0, 15,
6513                              $#taglist <=  15 ? undef :
6514                              $cgi->a({-href => href(action=>"tags")}, "..."));
6515        }
6516
6517        if (@headlist) {
6518                git_print_header_div('heads');
6519                git_heads_body(\@headlist, $head, 0, 15,
6520                               $#headlist <= 15 ? undef :
6521                               $cgi->a({-href => href(action=>"heads")}, "..."));
6522        }
6523
6524        if (%remotedata) {
6525                git_print_header_div('remotes');
6526                git_remotes_body(\%remotedata, 15, $head);
6527        }
6528
6529        if (@forklist) {
6530                git_print_header_div('forks');
6531                git_project_list_body(\@forklist, 'age', 0, 15,
6532                                      $#forklist <= 15 ? undef :
6533                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6534                                      'no_header');
6535        }
6536
6537        git_footer_html();
6538}
6539
6540sub git_tag {
6541        my %tag = parse_tag($hash);
6542
6543        if (! %tag) {
6544                die_error(404, "Unknown tag object");
6545        }
6546
6547        my $head = git_get_head_hash($project);
6548        git_header_html();
6549        git_print_page_nav('','', $head,undef,$head);
6550        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6551        print "<div class=\"title_text\">\n" .
6552              "<table class=\"object_header\">\n" .
6553              "<tr>\n" .
6554              "<td>object</td>\n" .
6555              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6556                               $tag{'object'}) . "</td>\n" .
6557              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6558                                              $tag{'type'}) . "</td>\n" .
6559              "</tr>\n";
6560        if (defined($tag{'author'})) {
6561                git_print_authorship_rows(\%tag, 'author');
6562        }
6563        print "</table>\n\n" .
6564              "</div>\n";
6565        print "<div class=\"page_body\">";
6566        my $comment = $tag{'comment'};
6567        foreach my $line (@$comment) {
6568                chomp $line;
6569                print esc_html($line, -nbsp=>1) . "<br/>\n";
6570        }
6571        print "</div>\n";
6572        git_footer_html();
6573}
6574
6575sub git_blame_common {
6576        my $format = shift || 'porcelain';
6577        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6578                $format = 'incremental';
6579                $action = 'blame_incremental'; # for page title etc
6580        }
6581
6582        # permissions
6583        gitweb_check_feature('blame')
6584                or die_error(403, "Blame view not allowed");
6585
6586        # error checking
6587        die_error(400, "No file name given") unless $file_name;
6588        $hash_base ||= git_get_head_hash($project);
6589        die_error(404, "Couldn't find base commit") unless $hash_base;
6590        my %co = parse_commit($hash_base)
6591                or die_error(404, "Commit not found");
6592        my $ftype = "blob";
6593        if (!defined $hash) {
6594                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6595                        or die_error(404, "Error looking up file");
6596        } else {
6597                $ftype = git_get_type($hash);
6598                if ($ftype !~ "blob") {
6599                        die_error(400, "Object is not a blob");
6600                }
6601        }
6602
6603        my $fd;
6604        if ($format eq 'incremental') {
6605                # get file contents (as base)
6606                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6607                        or die_error(500, "Open git-cat-file failed");
6608        } elsif ($format eq 'data') {
6609                # run git-blame --incremental
6610                open $fd, "-|", git_cmd(), "blame", "--incremental",
6611                        $hash_base, "--", $file_name
6612                        or die_error(500, "Open git-blame --incremental failed");
6613        } else {
6614                # run git-blame --porcelain
6615                open $fd, "-|", git_cmd(), "blame", '-p',
6616                        $hash_base, '--', $file_name
6617                        or die_error(500, "Open git-blame --porcelain failed");
6618        }
6619
6620        # incremental blame data returns early
6621        if ($format eq 'data') {
6622                print $cgi->header(
6623                        -type=>"text/plain", -charset => "utf-8",
6624                        -status=> "200 OK");
6625                local $| = 1; # output autoflush
6626                while (my $line = <$fd>) {
6627                        print to_utf8($line);
6628                }
6629                close $fd
6630                        or print "ERROR $!\n";
6631
6632                print 'END';
6633                if (defined $t0 && gitweb_check_feature('timed')) {
6634                        print ' '.
6635                              tv_interval($t0, [ gettimeofday() ]).
6636                              ' '.$number_of_git_cmds;
6637                }
6638                print "\n";
6639
6640                return;
6641        }
6642
6643        # page header
6644        git_header_html();
6645        my $formats_nav =
6646                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6647                        "blob") .
6648                " | ";
6649        if ($format eq 'incremental') {
6650                $formats_nav .=
6651                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6652                                "blame") . " (non-incremental)";
6653        } else {
6654                $formats_nav .=
6655                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6656                                "blame") . " (incremental)";
6657        }
6658        $formats_nav .=
6659                " | " .
6660                $cgi->a({-href => href(action=>"history", -replay=>1)},
6661                        "history") .
6662                " | " .
6663                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6664                        "HEAD");
6665        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6666        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6667        git_print_page_path($file_name, $ftype, $hash_base);
6668
6669        # page body
6670        if ($format eq 'incremental') {
6671                print "<noscript>\n<div class=\"error\"><center><b>\n".
6672                      "This page requires JavaScript to run.\n Use ".
6673                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6674                              'this page').
6675                      " instead.\n".
6676                      "</b></center></div>\n</noscript>\n";
6677
6678                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6679        }
6680
6681        print qq!<div class="page_body">\n!;
6682        print qq!<div id="progress_info">... / ...</div>\n!
6683                if ($format eq 'incremental');
6684        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6685              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6686              qq!<thead>\n!.
6687              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6688              qq!</thead>\n!.
6689              qq!<tbody>\n!;
6690
6691        my @rev_color = qw(light dark);
6692        my $num_colors = scalar(@rev_color);
6693        my $current_color = 0;
6694
6695        if ($format eq 'incremental') {
6696                my $color_class = $rev_color[$current_color];
6697
6698                #contents of a file
6699                my $linenr = 0;
6700        LINE:
6701                while (my $line = <$fd>) {
6702                        chomp $line;
6703                        $linenr++;
6704
6705                        print qq!<tr id="l$linenr" class="$color_class">!.
6706                              qq!<td class="sha1"><a href=""> </a></td>!.
6707                              qq!<td class="linenr">!.
6708                              qq!<a class="linenr" href="">$linenr</a></td>!;
6709                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6710                        print qq!</tr>\n!;
6711                }
6712
6713        } else { # porcelain, i.e. ordinary blame
6714                my %metainfo = (); # saves information about commits
6715
6716                # blame data
6717        LINE:
6718                while (my $line = <$fd>) {
6719                        chomp $line;
6720                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6721                        # no <lines in group> for subsequent lines in group of lines
6722                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6723                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6724                        if (!exists $metainfo{$full_rev}) {
6725                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6726                        }
6727                        my $meta = $metainfo{$full_rev};
6728                        my $data;
6729                        while ($data = <$fd>) {
6730                                chomp $data;
6731                                last if ($data =~ s/^\t//); # contents of line
6732                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6733                                        $meta->{$1} = $2 unless exists $meta->{$1};
6734                                }
6735                                if ($data =~ /^previous /) {
6736                                        $meta->{'nprevious'}++;
6737                                }
6738                        }
6739                        my $short_rev = substr($full_rev, 0, 8);
6740                        my $author = $meta->{'author'};
6741                        my %date =
6742                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6743                        my $date = $date{'iso-tz'};
6744                        if ($group_size) {
6745                                $current_color = ($current_color + 1) % $num_colors;
6746                        }
6747                        my $tr_class = $rev_color[$current_color];
6748                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6749                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6750                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6751                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6752                        if ($group_size) {
6753                                print "<td class=\"sha1\"";
6754                                print " title=\"". esc_html($author) . ", $date\"";
6755                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6756                                print ">";
6757                                print $cgi->a({-href => href(action=>"commit",
6758                                                             hash=>$full_rev,
6759                                                             file_name=>$file_name)},
6760                                              esc_html($short_rev));
6761                                if ($group_size >= 2) {
6762                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6763                                        if (@author_initials) {
6764                                                print "<br />" .
6765                                                      esc_html(join('', @author_initials));
6766                                                #           or join('.', ...)
6767                                        }
6768                                }
6769                                print "</td>\n";
6770                        }
6771                        # 'previous' <sha1 of parent commit> <filename at commit>
6772                        if (exists $meta->{'previous'} &&
6773                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6774                                $meta->{'parent'} = $1;
6775                                $meta->{'file_parent'} = unquote($2);
6776                        }
6777                        my $linenr_commit =
6778                                exists($meta->{'parent'}) ?
6779                                $meta->{'parent'} : $full_rev;
6780                        my $linenr_filename =
6781                                exists($meta->{'file_parent'}) ?
6782                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6783                        my $blamed = href(action => 'blame',
6784                                          file_name => $linenr_filename,
6785                                          hash_base => $linenr_commit);
6786                        print "<td class=\"linenr\">";
6787                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6788                                        -class => "linenr" },
6789                                      esc_html($lineno));
6790                        print "</td>";
6791                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6792                        print "</tr>\n";
6793                } # end while
6794
6795        }
6796
6797        # footer
6798        print "</tbody>\n".
6799              "</table>\n"; # class="blame"
6800        print "</div>\n";   # class="blame_body"
6801        close $fd
6802                or print "Reading blob failed\n";
6803
6804        git_footer_html();
6805}
6806
6807sub git_blame {
6808        git_blame_common();
6809}
6810
6811sub git_blame_incremental {
6812        git_blame_common('incremental');
6813}
6814
6815sub git_blame_data {
6816        git_blame_common('data');
6817}
6818
6819sub git_tags {
6820        my $head = git_get_head_hash($project);
6821        git_header_html();
6822        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6823        git_print_header_div('summary', $project);
6824
6825        my @tagslist = git_get_tags_list();
6826        if (@tagslist) {
6827                git_tags_body(\@tagslist);
6828        }
6829        git_footer_html();
6830}
6831
6832sub git_heads {
6833        my $head = git_get_head_hash($project);
6834        git_header_html();
6835        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6836        git_print_header_div('summary', $project);
6837
6838        my @headslist = git_get_heads_list();
6839        if (@headslist) {
6840                git_heads_body(\@headslist, $head);
6841        }
6842        git_footer_html();
6843}
6844
6845# used both for single remote view and for list of all the remotes
6846sub git_remotes {
6847        gitweb_check_feature('remote_heads')
6848                or die_error(403, "Remote heads view is disabled");
6849
6850        my $head = git_get_head_hash($project);
6851        my $remote = $input_params{'hash'};
6852
6853        my $remotedata = git_get_remotes_list($remote);
6854        die_error(500, "Unable to get remote information") unless defined $remotedata;
6855
6856        unless (%$remotedata) {
6857                die_error(404, defined $remote ?
6858                        "Remote $remote not found" :
6859                        "No remotes found");
6860        }
6861
6862        git_header_html(undef, undef, -action_extra => $remote);
6863        git_print_page_nav('', '',  $head, undef, $head,
6864                format_ref_views($remote ? '' : 'remotes'));
6865
6866        fill_remote_heads($remotedata);
6867        if (defined $remote) {
6868                git_print_header_div('remotes', "$remote remote for $project");
6869                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6870        } else {
6871                git_print_header_div('summary', "$project remotes");
6872                git_remotes_body($remotedata, undef, $head);
6873        }
6874
6875        git_footer_html();
6876}
6877
6878sub git_blob_plain {
6879        my $type = shift;
6880        my $expires;
6881
6882        if (!defined $hash) {
6883                if (defined $file_name) {
6884                        my $base = $hash_base || git_get_head_hash($project);
6885                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6886                                or die_error(404, "Cannot find file");
6887                } else {
6888                        die_error(400, "No file name defined");
6889                }
6890        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6891                # blobs defined by non-textual hash id's can be cached
6892                $expires = "+1d";
6893        }
6894
6895        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6896                or die_error(500, "Open git-cat-file blob '$hash' failed");
6897
6898        # content-type (can include charset)
6899        $type = blob_contenttype($fd, $file_name, $type);
6900
6901        # "save as" filename, even when no $file_name is given
6902        my $save_as = "$hash";
6903        if (defined $file_name) {
6904                $save_as = $file_name;
6905        } elsif ($type =~ m/^text\//) {
6906                $save_as .= '.txt';
6907        }
6908
6909        # With XSS prevention on, blobs of all types except a few known safe
6910        # ones are served with "Content-Disposition: attachment" to make sure
6911        # they don't run in our security domain.  For certain image types,
6912        # blob view writes an <img> tag referring to blob_plain view, and we
6913        # want to be sure not to break that by serving the image as an
6914        # attachment (though Firefox 3 doesn't seem to care).
6915        my $sandbox = $prevent_xss &&
6916                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6917
6918        # serve text/* as text/plain
6919        if ($prevent_xss &&
6920            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6921             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6922                my $rest = $1;
6923                $rest = defined $rest ? $rest : '';
6924                $type = "text/plain$rest";
6925        }
6926
6927        print $cgi->header(
6928                -type => $type,
6929                -expires => $expires,
6930                -content_disposition =>
6931                        ($sandbox ? 'attachment' : 'inline')
6932                        . '; filename="' . $save_as . '"');
6933        local $/ = undef;
6934        binmode STDOUT, ':raw';
6935        print <$fd>;
6936        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6937        close $fd;
6938}
6939
6940sub git_blob {
6941        my $expires;
6942
6943        if (!defined $hash) {
6944                if (defined $file_name) {
6945                        my $base = $hash_base || git_get_head_hash($project);
6946                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6947                                or die_error(404, "Cannot find file");
6948                } else {
6949                        die_error(400, "No file name defined");
6950                }
6951        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6952                # blobs defined by non-textual hash id's can be cached
6953                $expires = "+1d";
6954        }
6955
6956        my $have_blame = gitweb_check_feature('blame');
6957        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6958                or die_error(500, "Couldn't cat $file_name, $hash");
6959        my $mimetype = blob_mimetype($fd, $file_name);
6960        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6961        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6962                close $fd;
6963                return git_blob_plain($mimetype);
6964        }
6965        # we can have blame only for text/* mimetype
6966        $have_blame &&= ($mimetype =~ m!^text/!);
6967
6968        my $highlight = gitweb_check_feature('highlight');
6969        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6970        $fd = run_highlighter($fd, $highlight, $syntax)
6971                if $syntax;
6972
6973        git_header_html(undef, $expires);
6974        my $formats_nav = '';
6975        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6976                if (defined $file_name) {
6977                        if ($have_blame) {
6978                                $formats_nav .=
6979                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6980                                                "blame") .
6981                                        " | ";
6982                        }
6983                        $formats_nav .=
6984                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6985                                        "history") .
6986                                " | " .
6987                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6988                                        "raw") .
6989                                " | " .
6990                                $cgi->a({-href => href(action=>"blob",
6991                                                       hash_base=>"HEAD", file_name=>$file_name)},
6992                                        "HEAD");
6993                } else {
6994                        $formats_nav .=
6995                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6996                                        "raw");
6997                }
6998                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6999                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7000        } else {
7001                print "<div class=\"page_nav\">\n" .
7002                      "<br/><br/></div>\n" .
7003                      "<div class=\"title\">".esc_html($hash)."</div>\n";
7004        }
7005        git_print_page_path($file_name, "blob", $hash_base);
7006        print "<div class=\"page_body\">\n";
7007        if ($mimetype =~ m!^image/!) {
7008                print qq!<img type="!.esc_attr($mimetype).qq!"!;
7009                if ($file_name) {
7010                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7011                }
7012                print qq! src="! .
7013                      href(action=>"blob_plain", hash=>$hash,
7014                           hash_base=>$hash_base, file_name=>$file_name) .
7015                      qq!" />\n!;
7016        } else {
7017                my $nr;
7018                while (my $line = <$fd>) {
7019                        chomp $line;
7020                        $nr++;
7021                        $line = untabify($line);
7022                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7023                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7024                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7025                }
7026        }
7027        close $fd
7028                or print "Reading blob failed.\n";
7029        print "</div>";
7030        git_footer_html();
7031}
7032
7033sub git_tree {
7034        if (!defined $hash_base) {
7035                $hash_base = "HEAD";
7036        }
7037        if (!defined $hash) {
7038                if (defined $file_name) {
7039                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7040                } else {
7041                        $hash = $hash_base;
7042                }
7043        }
7044        die_error(404, "No such tree") unless defined($hash);
7045
7046        my $show_sizes = gitweb_check_feature('show-sizes');
7047        my $have_blame = gitweb_check_feature('blame');
7048
7049        my @entries = ();
7050        {
7051                local $/ = "\0";
7052                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7053                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7054                        or die_error(500, "Open git-ls-tree failed");
7055                @entries = map { chomp; $_ } <$fd>;
7056                close $fd
7057                        or die_error(404, "Reading tree failed");
7058        }
7059
7060        my $refs = git_get_references();
7061        my $ref = format_ref_marker($refs, $hash_base);
7062        git_header_html();
7063        my $basedir = '';
7064        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7065                my @views_nav = ();
7066                if (defined $file_name) {
7067                        push @views_nav,
7068                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7069                                        "history"),
7070                                $cgi->a({-href => href(action=>"tree",
7071                                                       hash_base=>"HEAD", file_name=>$file_name)},
7072                                        "HEAD"),
7073                }
7074                my $snapshot_links = format_snapshot_links($hash);
7075                if (defined $snapshot_links) {
7076                        # FIXME: Should be available when we have no hash base as well.
7077                        push @views_nav, $snapshot_links;
7078                }
7079                git_print_page_nav('tree','', $hash_base, undef, undef,
7080                                   join(' | ', @views_nav));
7081                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7082        } else {
7083                undef $hash_base;
7084                print "<div class=\"page_nav\">\n";
7085                print "<br/><br/></div>\n";
7086                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7087        }
7088        if (defined $file_name) {
7089                $basedir = $file_name;
7090                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7091                        $basedir .= '/';
7092                }
7093                git_print_page_path($file_name, 'tree', $hash_base);
7094        }
7095        print "<div class=\"page_body\">\n";
7096        print "<table class=\"tree\">\n";
7097        my $alternate = 1;
7098        # '..' (top directory) link if possible
7099        if (defined $hash_base &&
7100            defined $file_name && $file_name =~ m![^/]+$!) {
7101                if ($alternate) {
7102                        print "<tr class=\"dark\">\n";
7103                } else {
7104                        print "<tr class=\"light\">\n";
7105                }
7106                $alternate ^= 1;
7107
7108                my $up = $file_name;
7109                $up =~ s!/?[^/]+$!!;
7110                undef $up unless $up;
7111                # based on git_print_tree_entry
7112                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7113                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7114                print '<td class="list">';
7115                print $cgi->a({-href => href(action=>"tree",
7116                                             hash_base=>$hash_base,
7117                                             file_name=>$up)},
7118                              "..");
7119                print "</td>\n";
7120                print "<td class=\"link\"></td>\n";
7121
7122                print "</tr>\n";
7123        }
7124        foreach my $line (@entries) {
7125                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7126
7127                if ($alternate) {
7128                        print "<tr class=\"dark\">\n";
7129                } else {
7130                        print "<tr class=\"light\">\n";
7131                }
7132                $alternate ^= 1;
7133
7134                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7135
7136                print "</tr>\n";
7137        }
7138        print "</table>\n" .
7139              "</div>";
7140        git_footer_html();
7141}
7142
7143sub snapshot_name {
7144        my ($project, $hash) = @_;
7145
7146        # path/to/project.git  -> project
7147        # path/to/project/.git -> project
7148        my $name = to_utf8($project);
7149        $name =~ s,([^/])/*\.git$,$1,;
7150        $name = basename($name);
7151        # sanitize name
7152        $name =~ s/[[:cntrl:]]/?/g;
7153
7154        my $ver = $hash;
7155        if ($hash =~ /^[0-9a-fA-F]+$/) {
7156                # shorten SHA-1 hash
7157                my $full_hash = git_get_full_hash($project, $hash);
7158                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7159                        $ver = git_get_short_hash($project, $hash);
7160                }
7161        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7162                # tags don't need shortened SHA-1 hash
7163                $ver = $1;
7164        } else {
7165                # branches and other need shortened SHA-1 hash
7166                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7167                        $ver = $1;
7168                }
7169                $ver .= '-' . git_get_short_hash($project, $hash);
7170        }
7171        # in case of hierarchical branch names
7172        $ver =~ s!/!.!g;
7173
7174        # name = project-version_string
7175        $name = "$name-$ver";
7176
7177        return wantarray ? ($name, $name) : $name;
7178}
7179
7180sub exit_if_unmodified_since {
7181        my ($latest_epoch) = @_;
7182        our $cgi;
7183
7184        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7185        if (defined $if_modified) {
7186                my $since;
7187                if (eval { require HTTP::Date; 1; }) {
7188                        $since = HTTP::Date::str2time($if_modified);
7189                } elsif (eval { require Time::ParseDate; 1; }) {
7190                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7191                }
7192                if (defined $since && $latest_epoch <= $since) {
7193                        my %latest_date = parse_date($latest_epoch);
7194                        print $cgi->header(
7195                                -last_modified => $latest_date{'rfc2822'},
7196                                -status => '304 Not Modified');
7197                        goto DONE_GITWEB;
7198                }
7199        }
7200}
7201
7202sub git_snapshot {
7203        my $format = $input_params{'snapshot_format'};
7204        if (!@snapshot_fmts) {
7205                die_error(403, "Snapshots not allowed");
7206        }
7207        # default to first supported snapshot format
7208        $format ||= $snapshot_fmts[0];
7209        if ($format !~ m/^[a-z0-9]+$/) {
7210                die_error(400, "Invalid snapshot format parameter");
7211        } elsif (!exists($known_snapshot_formats{$format})) {
7212                die_error(400, "Unknown snapshot format");
7213        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7214                die_error(403, "Snapshot format not allowed");
7215        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7216                die_error(403, "Unsupported snapshot format");
7217        }
7218
7219        my $type = git_get_type("$hash^{}");
7220        if (!$type) {
7221                die_error(404, 'Object does not exist');
7222        }  elsif ($type eq 'blob') {
7223                die_error(400, 'Object is not a tree-ish');
7224        }
7225
7226        my ($name, $prefix) = snapshot_name($project, $hash);
7227        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7228
7229        my %co = parse_commit($hash);
7230        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7231
7232        my $cmd = quote_command(
7233                git_cmd(), 'archive',
7234                "--format=$known_snapshot_formats{$format}{'format'}",
7235                "--prefix=$prefix/", $hash);
7236        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7237                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7238        }
7239
7240        $filename =~ s/(["\\])/\\$1/g;
7241        my %latest_date;
7242        if (%co) {
7243                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7244        }
7245
7246        print $cgi->header(
7247                -type => $known_snapshot_formats{$format}{'type'},
7248                -content_disposition => 'inline; filename="' . $filename . '"',
7249                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7250                -status => '200 OK');
7251
7252        open my $fd, "-|", $cmd
7253                or die_error(500, "Execute git-archive failed");
7254        binmode STDOUT, ':raw';
7255        print <$fd>;
7256        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7257        close $fd;
7258}
7259
7260sub git_log_generic {
7261        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7262
7263        my $head = git_get_head_hash($project);
7264        if (!defined $base) {
7265                $base = $head;
7266        }
7267        if (!defined $page) {
7268                $page = 0;
7269        }
7270        my $refs = git_get_references();
7271
7272        my $commit_hash = $base;
7273        if (defined $parent) {
7274                $commit_hash = "$parent..$base";
7275        }
7276        my @commitlist =
7277                parse_commits($commit_hash, 101, (100 * $page),
7278                              defined $file_name ? ($file_name, "--full-history") : ());
7279
7280        my $ftype;
7281        if (!defined $file_hash && defined $file_name) {
7282                # some commits could have deleted file in question,
7283                # and not have it in tree, but one of them has to have it
7284                for (my $i = 0; $i < @commitlist; $i++) {
7285                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7286                        last if defined $file_hash;
7287                }
7288        }
7289        if (defined $file_hash) {
7290                $ftype = git_get_type($file_hash);
7291        }
7292        if (defined $file_name && !defined $ftype) {
7293                die_error(500, "Unknown type of object");
7294        }
7295        my %co;
7296        if (defined $file_name) {
7297                %co = parse_commit($base)
7298                        or die_error(404, "Unknown commit object");
7299        }
7300
7301
7302        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7303        my $next_link = '';
7304        if ($#commitlist >= 100) {
7305                $next_link =
7306                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7307                                 -accesskey => "n", -title => "Alt-n"}, "next");
7308        }
7309        my $patch_max = gitweb_get_feature('patches');
7310        if ($patch_max && !defined $file_name) {
7311                if ($patch_max < 0 || @commitlist <= $patch_max) {
7312                        $paging_nav .= " &sdot; " .
7313                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7314                                        "patches");
7315                }
7316        }
7317
7318        git_header_html();
7319        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7320        if (defined $file_name) {
7321                git_print_header_div('commit', esc_html($co{'title'}), $base);
7322        } else {
7323                git_print_header_div('summary', $project)
7324        }
7325        git_print_page_path($file_name, $ftype, $hash_base)
7326                if (defined $file_name);
7327
7328        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7329                     $file_name, $file_hash, $ftype);
7330
7331        git_footer_html();
7332}
7333
7334sub git_log {
7335        git_log_generic('log', \&git_log_body,
7336                        $hash, $hash_parent);
7337}
7338
7339sub git_commit {
7340        $hash ||= $hash_base || "HEAD";
7341        my %co = parse_commit($hash)
7342            or die_error(404, "Unknown commit object");
7343
7344        my $parent  = $co{'parent'};
7345        my $parents = $co{'parents'}; # listref
7346
7347        # we need to prepare $formats_nav before any parameter munging
7348        my $formats_nav;
7349        if (!defined $parent) {
7350                # --root commitdiff
7351                $formats_nav .= '(initial)';
7352        } elsif (@$parents == 1) {
7353                # single parent commit
7354                $formats_nav .=
7355                        '(parent: ' .
7356                        $cgi->a({-href => href(action=>"commit",
7357                                               hash=>$parent)},
7358                                esc_html(substr($parent, 0, 7))) .
7359                        ')';
7360        } else {
7361                # merge commit
7362                $formats_nav .=
7363                        '(merge: ' .
7364                        join(' ', map {
7365                                $cgi->a({-href => href(action=>"commit",
7366                                                       hash=>$_)},
7367                                        esc_html(substr($_, 0, 7)));
7368                        } @$parents ) .
7369                        ')';
7370        }
7371        if (gitweb_check_feature('patches') && @$parents <= 1) {
7372                $formats_nav .= " | " .
7373                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7374                                "patch");
7375        }
7376
7377        if (!defined $parent) {
7378                $parent = "--root";
7379        }
7380        my @difftree;
7381        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7382                @diff_opts,
7383                (@$parents <= 1 ? $parent : '-c'),
7384                $hash, "--"
7385                or die_error(500, "Open git-diff-tree failed");
7386        @difftree = map { chomp; $_ } <$fd>;
7387        close $fd or die_error(404, "Reading git-diff-tree failed");
7388
7389        # non-textual hash id's can be cached
7390        my $expires;
7391        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7392                $expires = "+1d";
7393        }
7394        my $refs = git_get_references();
7395        my $ref = format_ref_marker($refs, $co{'id'});
7396
7397        git_header_html(undef, $expires);
7398        git_print_page_nav('commit', '',
7399                           $hash, $co{'tree'}, $hash,
7400                           $formats_nav);
7401
7402        if (defined $co{'parent'}) {
7403                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7404        } else {
7405                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7406        }
7407        print "<div class=\"title_text\">\n" .
7408              "<table class=\"object_header\">\n";
7409        git_print_authorship_rows(\%co);
7410        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7411        print "<tr>" .
7412              "<td>tree</td>" .
7413              "<td class=\"sha1\">" .
7414              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7415                       class => "list"}, $co{'tree'}) .
7416              "</td>" .
7417              "<td class=\"link\">" .
7418              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7419                      "tree");
7420        my $snapshot_links = format_snapshot_links($hash);
7421        if (defined $snapshot_links) {
7422                print " | " . $snapshot_links;
7423        }
7424        print "</td>" .
7425              "</tr>\n";
7426
7427        foreach my $par (@$parents) {
7428                print "<tr>" .
7429                      "<td>parent</td>" .
7430                      "<td class=\"sha1\">" .
7431                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7432                               class => "list"}, $par) .
7433                      "</td>" .
7434                      "<td class=\"link\">" .
7435                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7436                      " | " .
7437                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7438                      "</td>" .
7439                      "</tr>\n";
7440        }
7441        print "</table>".
7442              "</div>\n";
7443
7444        print "<div class=\"page_body\">\n";
7445        git_print_log($co{'comment'});
7446        print "</div>\n";
7447
7448        git_difftree_body(\@difftree, $hash, @$parents);
7449
7450        git_footer_html();
7451}
7452
7453sub git_object {
7454        # object is defined by:
7455        # - hash or hash_base alone
7456        # - hash_base and file_name
7457        my $type;
7458
7459        # - hash or hash_base alone
7460        if ($hash || ($hash_base && !defined $file_name)) {
7461                my $object_id = $hash || $hash_base;
7462
7463                open my $fd, "-|", quote_command(
7464                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7465                        or die_error(404, "Object does not exist");
7466                $type = <$fd>;
7467                chomp $type;
7468                close $fd
7469                        or die_error(404, "Object does not exist");
7470
7471        # - hash_base and file_name
7472        } elsif ($hash_base && defined $file_name) {
7473                $file_name =~ s,/+$,,;
7474
7475                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7476                        or die_error(404, "Base object does not exist");
7477
7478                # here errors should not hapen
7479                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7480                        or die_error(500, "Open git-ls-tree failed");
7481                my $line = <$fd>;
7482                close $fd;
7483
7484                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7485                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7486                        die_error(404, "File or directory for given base does not exist");
7487                }
7488                $type = $2;
7489                $hash = $3;
7490        } else {
7491                die_error(400, "Not enough information to find object");
7492        }
7493
7494        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7495                                          hash=>$hash, hash_base=>$hash_base,
7496                                          file_name=>$file_name),
7497                             -status => '302 Found');
7498}
7499
7500sub git_blobdiff {
7501        my $format = shift || 'html';
7502        my $diff_style = $input_params{'diff_style'} || 'inline';
7503
7504        my $fd;
7505        my @difftree;
7506        my %diffinfo;
7507        my $expires;
7508
7509        # preparing $fd and %diffinfo for git_patchset_body
7510        # new style URI
7511        if (defined $hash_base && defined $hash_parent_base) {
7512                if (defined $file_name) {
7513                        # read raw output
7514                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7515                                $hash_parent_base, $hash_base,
7516                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7517                                or die_error(500, "Open git-diff-tree failed");
7518                        @difftree = map { chomp; $_ } <$fd>;
7519                        close $fd
7520                                or die_error(404, "Reading git-diff-tree failed");
7521                        @difftree
7522                                or die_error(404, "Blob diff not found");
7523
7524                } elsif (defined $hash &&
7525                         $hash =~ /[0-9a-fA-F]{40}/) {
7526                        # try to find filename from $hash
7527
7528                        # read filtered raw output
7529                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7530                                $hash_parent_base, $hash_base, "--"
7531                                or die_error(500, "Open git-diff-tree failed");
7532                        @difftree =
7533                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7534                                # $hash == to_id
7535                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7536                                map { chomp; $_ } <$fd>;
7537                        close $fd
7538                                or die_error(404, "Reading git-diff-tree failed");
7539                        @difftree
7540                                or die_error(404, "Blob diff not found");
7541
7542                } else {
7543                        die_error(400, "Missing one of the blob diff parameters");
7544                }
7545
7546                if (@difftree > 1) {
7547                        die_error(400, "Ambiguous blob diff specification");
7548                }
7549
7550                %diffinfo = parse_difftree_raw_line($difftree[0]);
7551                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7552                $file_name   ||= $diffinfo{'to_file'};
7553
7554                $hash_parent ||= $diffinfo{'from_id'};
7555                $hash        ||= $diffinfo{'to_id'};
7556
7557                # non-textual hash id's can be cached
7558                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7559                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7560                        $expires = '+1d';
7561                }
7562
7563                # open patch output
7564                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7565                        '-p', ($format eq 'html' ? "--full-index" : ()),
7566                        $hash_parent_base, $hash_base,
7567                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7568                        or die_error(500, "Open git-diff-tree failed");
7569        }
7570
7571        # old/legacy style URI -- not generated anymore since 1.4.3.
7572        if (!%diffinfo) {
7573                die_error('404 Not Found', "Missing one of the blob diff parameters")
7574        }
7575
7576        # header
7577        if ($format eq 'html') {
7578                my $formats_nav =
7579                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7580                                "raw");
7581                $formats_nav .= diff_style_nav($diff_style);
7582                git_header_html(undef, $expires);
7583                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7584                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7585                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7586                } else {
7587                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7588                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7589                }
7590                if (defined $file_name) {
7591                        git_print_page_path($file_name, "blob", $hash_base);
7592                } else {
7593                        print "<div class=\"page_path\"></div>\n";
7594                }
7595
7596        } elsif ($format eq 'plain') {
7597                print $cgi->header(
7598                        -type => 'text/plain',
7599                        -charset => 'utf-8',
7600                        -expires => $expires,
7601                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7602
7603                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7604
7605        } else {
7606                die_error(400, "Unknown blobdiff format");
7607        }
7608
7609        # patch
7610        if ($format eq 'html') {
7611                print "<div class=\"page_body\">\n";
7612
7613                git_patchset_body($fd, $diff_style,
7614                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7615                close $fd;
7616
7617                print "</div>\n"; # class="page_body"
7618                git_footer_html();
7619
7620        } else {
7621                while (my $line = <$fd>) {
7622                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7623                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7624
7625                        print $line;
7626
7627                        last if $line =~ m!^\+\+\+!;
7628                }
7629                local $/ = undef;
7630                print <$fd>;
7631                close $fd;
7632        }
7633}
7634
7635sub git_blobdiff_plain {
7636        git_blobdiff('plain');
7637}
7638
7639# assumes that it is added as later part of already existing navigation,
7640# so it returns "| foo | bar" rather than just "foo | bar"
7641sub diff_style_nav {
7642        my ($diff_style, $is_combined) = @_;
7643        $diff_style ||= 'inline';
7644
7645        return "" if ($is_combined);
7646
7647        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7648        my %styles = @styles;
7649        @styles =
7650                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7651
7652        return join '',
7653                map { " | ".$_ }
7654                map {
7655                        $_ eq $diff_style ? $styles{$_} :
7656                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7657                } @styles;
7658}
7659
7660sub git_commitdiff {
7661        my %params = @_;
7662        my $format = $params{-format} || 'html';
7663        my $diff_style = $input_params{'diff_style'} || 'inline';
7664
7665        my ($patch_max) = gitweb_get_feature('patches');
7666        if ($format eq 'patch') {
7667                die_error(403, "Patch view not allowed") unless $patch_max;
7668        }
7669
7670        $hash ||= $hash_base || "HEAD";
7671        my %co = parse_commit($hash)
7672            or die_error(404, "Unknown commit object");
7673
7674        # choose format for commitdiff for merge
7675        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7676                $hash_parent = '--cc';
7677        }
7678        # we need to prepare $formats_nav before almost any parameter munging
7679        my $formats_nav;
7680        if ($format eq 'html') {
7681                $formats_nav =
7682                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7683                                "raw");
7684                if ($patch_max && @{$co{'parents'}} <= 1) {
7685                        $formats_nav .= " | " .
7686                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7687                                        "patch");
7688                }
7689                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7690
7691                if (defined $hash_parent &&
7692                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7693                        # commitdiff with two commits given
7694                        my $hash_parent_short = $hash_parent;
7695                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7696                                $hash_parent_short = substr($hash_parent, 0, 7);
7697                        }
7698                        $formats_nav .=
7699                                ' (from';
7700                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7701                                if ($co{'parents'}[$i] eq $hash_parent) {
7702                                        $formats_nav .= ' parent ' . ($i+1);
7703                                        last;
7704                                }
7705                        }
7706                        $formats_nav .= ': ' .
7707                                $cgi->a({-href => href(-replay=>1,
7708                                                       hash=>$hash_parent, hash_base=>undef)},
7709                                        esc_html($hash_parent_short)) .
7710                                ')';
7711                } elsif (!$co{'parent'}) {
7712                        # --root commitdiff
7713                        $formats_nav .= ' (initial)';
7714                } elsif (scalar @{$co{'parents'}} == 1) {
7715                        # single parent commit
7716                        $formats_nav .=
7717                                ' (parent: ' .
7718                                $cgi->a({-href => href(-replay=>1,
7719                                                       hash=>$co{'parent'}, hash_base=>undef)},
7720                                        esc_html(substr($co{'parent'}, 0, 7))) .
7721                                ')';
7722                } else {
7723                        # merge commit
7724                        if ($hash_parent eq '--cc') {
7725                                $formats_nav .= ' | ' .
7726                                        $cgi->a({-href => href(-replay=>1,
7727                                                               hash=>$hash, hash_parent=>'-c')},
7728                                                'combined');
7729                        } else { # $hash_parent eq '-c'
7730                                $formats_nav .= ' | ' .
7731                                        $cgi->a({-href => href(-replay=>1,
7732                                                               hash=>$hash, hash_parent=>'--cc')},
7733                                                'compact');
7734                        }
7735                        $formats_nav .=
7736                                ' (merge: ' .
7737                                join(' ', map {
7738                                        $cgi->a({-href => href(-replay=>1,
7739                                                               hash=>$_, hash_base=>undef)},
7740                                                esc_html(substr($_, 0, 7)));
7741                                } @{$co{'parents'}} ) .
7742                                ')';
7743                }
7744        }
7745
7746        my $hash_parent_param = $hash_parent;
7747        if (!defined $hash_parent_param) {
7748                # --cc for multiple parents, --root for parentless
7749                $hash_parent_param =
7750                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7751        }
7752
7753        # read commitdiff
7754        my $fd;
7755        my @difftree;
7756        if ($format eq 'html') {
7757                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7758                        "--no-commit-id", "--patch-with-raw", "--full-index",
7759                        $hash_parent_param, $hash, "--"
7760                        or die_error(500, "Open git-diff-tree failed");
7761
7762                while (my $line = <$fd>) {
7763                        chomp $line;
7764                        # empty line ends raw part of diff-tree output
7765                        last unless $line;
7766                        push @difftree, scalar parse_difftree_raw_line($line);
7767                }
7768
7769        } elsif ($format eq 'plain') {
7770                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7771                        '-p', $hash_parent_param, $hash, "--"
7772                        or die_error(500, "Open git-diff-tree failed");
7773        } elsif ($format eq 'patch') {
7774                # For commit ranges, we limit the output to the number of
7775                # patches specified in the 'patches' feature.
7776                # For single commits, we limit the output to a single patch,
7777                # diverging from the git-format-patch default.
7778                my @commit_spec = ();
7779                if ($hash_parent) {
7780                        if ($patch_max > 0) {
7781                                push @commit_spec, "-$patch_max";
7782                        }
7783                        push @commit_spec, '-n', "$hash_parent..$hash";
7784                } else {
7785                        if ($params{-single}) {
7786                                push @commit_spec, '-1';
7787                        } else {
7788                                if ($patch_max > 0) {
7789                                        push @commit_spec, "-$patch_max";
7790                                }
7791                                push @commit_spec, "-n";
7792                        }
7793                        push @commit_spec, '--root', $hash;
7794                }
7795                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7796                        '--encoding=utf8', '--stdout', @commit_spec
7797                        or die_error(500, "Open git-format-patch failed");
7798        } else {
7799                die_error(400, "Unknown commitdiff format");
7800        }
7801
7802        # non-textual hash id's can be cached
7803        my $expires;
7804        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7805                $expires = "+1d";
7806        }
7807
7808        # write commit message
7809        if ($format eq 'html') {
7810                my $refs = git_get_references();
7811                my $ref = format_ref_marker($refs, $co{'id'});
7812
7813                git_header_html(undef, $expires);
7814                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7815                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7816                print "<div class=\"title_text\">\n" .
7817                      "<table class=\"object_header\">\n";
7818                git_print_authorship_rows(\%co);
7819                print "</table>".
7820                      "</div>\n";
7821                print "<div class=\"page_body\">\n";
7822                if (@{$co{'comment'}} > 1) {
7823                        print "<div class=\"log\">\n";
7824                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7825                        print "</div>\n"; # class="log"
7826                }
7827
7828        } elsif ($format eq 'plain') {
7829                my $refs = git_get_references("tags");
7830                my $tagname = git_get_rev_name_tags($hash);
7831                my $filename = basename($project) . "-$hash.patch";
7832
7833                print $cgi->header(
7834                        -type => 'text/plain',
7835                        -charset => 'utf-8',
7836                        -expires => $expires,
7837                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7838                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7839                print "From: " . to_utf8($co{'author'}) . "\n";
7840                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7841                print "Subject: " . to_utf8($co{'title'}) . "\n";
7842
7843                print "X-Git-Tag: $tagname\n" if $tagname;
7844                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7845
7846                foreach my $line (@{$co{'comment'}}) {
7847                        print to_utf8($line) . "\n";
7848                }
7849                print "---\n\n";
7850        } elsif ($format eq 'patch') {
7851                my $filename = basename($project) . "-$hash.patch";
7852
7853                print $cgi->header(
7854                        -type => 'text/plain',
7855                        -charset => 'utf-8',
7856                        -expires => $expires,
7857                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7858        }
7859
7860        # write patch
7861        if ($format eq 'html') {
7862                my $use_parents = !defined $hash_parent ||
7863                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7864                git_difftree_body(\@difftree, $hash,
7865                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7866                print "<br/>\n";
7867
7868                git_patchset_body($fd, $diff_style,
7869                                  \@difftree, $hash,
7870                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7871                close $fd;
7872                print "</div>\n"; # class="page_body"
7873                git_footer_html();
7874
7875        } elsif ($format eq 'plain') {
7876                local $/ = undef;
7877                print <$fd>;
7878                close $fd
7879                        or print "Reading git-diff-tree failed\n";
7880        } elsif ($format eq 'patch') {
7881                local $/ = undef;
7882                print <$fd>;
7883                close $fd
7884                        or print "Reading git-format-patch failed\n";
7885        }
7886}
7887
7888sub git_commitdiff_plain {
7889        git_commitdiff(-format => 'plain');
7890}
7891
7892# format-patch-style patches
7893sub git_patch {
7894        git_commitdiff(-format => 'patch', -single => 1);
7895}
7896
7897sub git_patches {
7898        git_commitdiff(-format => 'patch');
7899}
7900
7901sub git_history {
7902        git_log_generic('history', \&git_history_body,
7903                        $hash_base, $hash_parent_base,
7904                        $file_name, $hash);
7905}
7906
7907sub git_search {
7908        $searchtype ||= 'commit';
7909
7910        # check if appropriate features are enabled
7911        gitweb_check_feature('search')
7912                or die_error(403, "Search is disabled");
7913        if ($searchtype eq 'pickaxe') {
7914                # pickaxe may take all resources of your box and run for several minutes
7915                # with every query - so decide by yourself how public you make this feature
7916                gitweb_check_feature('pickaxe')
7917                        or die_error(403, "Pickaxe search is disabled");
7918        }
7919        if ($searchtype eq 'grep') {
7920                # grep search might be potentially CPU-intensive, too
7921                gitweb_check_feature('grep')
7922                        or die_error(403, "Grep search is disabled");
7923        }
7924
7925        if (!defined $searchtext) {
7926                die_error(400, "Text field is empty");
7927        }
7928        if (!defined $hash) {
7929                $hash = git_get_head_hash($project);
7930        }
7931        my %co = parse_commit($hash);
7932        if (!%co) {
7933                die_error(404, "Unknown commit object");
7934        }
7935        if (!defined $page) {
7936                $page = 0;
7937        }
7938
7939        if ($searchtype eq 'commit' ||
7940            $searchtype eq 'author' ||
7941            $searchtype eq 'committer') {
7942                git_search_message(%co);
7943        } elsif ($searchtype eq 'pickaxe') {
7944                git_search_changes(%co);
7945        } elsif ($searchtype eq 'grep') {
7946                git_search_files(%co);
7947        } else {
7948                die_error(400, "Unknown search type");
7949        }
7950}
7951
7952sub git_search_help {
7953        git_header_html();
7954        git_print_page_nav('','', $hash,$hash,$hash);
7955        print <<EOT;
7956<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7957regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7958the pattern entered is recognized as the POSIX extended
7959<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7960insensitive).</p>
7961<dl>
7962<dt><b>commit</b></dt>
7963<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7964EOT
7965        my $have_grep = gitweb_check_feature('grep');
7966        if ($have_grep) {
7967                print <<EOT;
7968<dt><b>grep</b></dt>
7969<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7970    a different one) are searched for the given pattern. On large trees, this search can take
7971a while and put some strain on the server, so please use it with some consideration. Note that
7972due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7973case-sensitive.</dd>
7974EOT
7975        }
7976        print <<EOT;
7977<dt><b>author</b></dt>
7978<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7979<dt><b>committer</b></dt>
7980<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7981EOT
7982        my $have_pickaxe = gitweb_check_feature('pickaxe');
7983        if ($have_pickaxe) {
7984                print <<EOT;
7985<dt><b>pickaxe</b></dt>
7986<dd>All commits that caused the string to appear or disappear from any file (changes that
7987added, removed or "modified" the string) will be listed. This search can take a while and
7988takes a lot of strain on the server, so please use it wisely. Note that since you may be
7989interested even in changes just changing the case as well, this search is case sensitive.</dd>
7990EOT
7991        }
7992        print "</dl>\n";
7993        git_footer_html();
7994}
7995
7996sub git_shortlog {
7997        git_log_generic('shortlog', \&git_shortlog_body,
7998                        $hash, $hash_parent);
7999}
8000
8001## ......................................................................
8002## feeds (RSS, Atom; OPML)
8003
8004sub git_feed {
8005        my $format = shift || 'atom';
8006        my $have_blame = gitweb_check_feature('blame');
8007
8008        # Atom: http://www.atomenabled.org/developers/syndication/
8009        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8010        if ($format ne 'rss' && $format ne 'atom') {
8011                die_error(400, "Unknown web feed format");
8012        }
8013
8014        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8015        my $head = $hash || 'HEAD';
8016        my @commitlist = parse_commits($head, 150, 0, $file_name);
8017
8018        my %latest_commit;
8019        my %latest_date;
8020        my $content_type = "application/$format+xml";
8021        if (defined $cgi->http('HTTP_ACCEPT') &&
8022                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8023                # browser (feed reader) prefers text/xml
8024                $content_type = 'text/xml';
8025        }
8026        if (defined($commitlist[0])) {
8027                %latest_commit = %{$commitlist[0]};
8028                my $latest_epoch = $latest_commit{'committer_epoch'};
8029                exit_if_unmodified_since($latest_epoch);
8030                %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8031        }
8032        print $cgi->header(
8033                -type => $content_type,
8034                -charset => 'utf-8',
8035                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8036                -status => '200 OK');
8037
8038        # Optimization: skip generating the body if client asks only
8039        # for Last-Modified date.
8040        return if ($cgi->request_method() eq 'HEAD');
8041
8042        # header variables
8043        my $title = "$site_name - $project/$action";
8044        my $feed_type = 'log';
8045        if (defined $hash) {
8046                $title .= " - '$hash'";
8047                $feed_type = 'branch log';
8048                if (defined $file_name) {
8049                        $title .= " :: $file_name";
8050                        $feed_type = 'history';
8051                }
8052        } elsif (defined $file_name) {
8053                $title .= " - $file_name";
8054                $feed_type = 'history';
8055        }
8056        $title .= " $feed_type";
8057        $title = esc_html($title);
8058        my $descr = git_get_project_description($project);
8059        if (defined $descr) {
8060                $descr = esc_html($descr);
8061        } else {
8062                $descr = "$project " .
8063                         ($format eq 'rss' ? 'RSS' : 'Atom') .
8064                         " feed";
8065        }
8066        my $owner = git_get_project_owner($project);
8067        $owner = esc_html($owner);
8068
8069        #header
8070        my $alt_url;
8071        if (defined $file_name) {
8072                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8073        } elsif (defined $hash) {
8074                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8075        } else {
8076                $alt_url = href(-full=>1, action=>"summary");
8077        }
8078        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8079        if ($format eq 'rss') {
8080                print <<XML;
8081<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8082<channel>
8083XML
8084                print "<title>$title</title>\n" .
8085                      "<link>$alt_url</link>\n" .
8086                      "<description>$descr</description>\n" .
8087                      "<language>en</language>\n" .
8088                      # project owner is responsible for 'editorial' content
8089                      "<managingEditor>$owner</managingEditor>\n";
8090                if (defined $logo || defined $favicon) {
8091                        # prefer the logo to the favicon, since RSS
8092                        # doesn't allow both
8093                        my $img = esc_url($logo || $favicon);
8094                        print "<image>\n" .
8095                              "<url>$img</url>\n" .
8096                              "<title>$title</title>\n" .
8097                              "<link>$alt_url</link>\n" .
8098                              "</image>\n";
8099                }
8100                if (%latest_date) {
8101                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8102                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8103                }
8104                print "<generator>gitweb v.$version/$git_version</generator>\n";
8105        } elsif ($format eq 'atom') {
8106                print <<XML;
8107<feed xmlns="http://www.w3.org/2005/Atom">
8108XML
8109                print "<title>$title</title>\n" .
8110                      "<subtitle>$descr</subtitle>\n" .
8111                      '<link rel="alternate" type="text/html" href="' .
8112                      $alt_url . '" />' . "\n" .
8113                      '<link rel="self" type="' . $content_type . '" href="' .
8114                      $cgi->self_url() . '" />' . "\n" .
8115                      "<id>" . href(-full=>1) . "</id>\n" .
8116                      # use project owner for feed author
8117                      "<author><name>$owner</name></author>\n";
8118                if (defined $favicon) {
8119                        print "<icon>" . esc_url($favicon) . "</icon>\n";
8120                }
8121                if (defined $logo) {
8122                        # not twice as wide as tall: 72 x 27 pixels
8123                        print "<logo>" . esc_url($logo) . "</logo>\n";
8124                }
8125                if (! %latest_date) {
8126                        # dummy date to keep the feed valid until commits trickle in:
8127                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
8128                } else {
8129                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
8130                }
8131                print "<generator version='$version/$git_version'>gitweb</generator>\n";
8132        }
8133
8134        # contents
8135        for (my $i = 0; $i <= $#commitlist; $i++) {
8136                my %co = %{$commitlist[$i]};
8137                my $commit = $co{'id'};
8138                # we read 150, we always show 30 and the ones more recent than 48 hours
8139                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8140                        last;
8141                }
8142                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8143
8144                # get list of changed files
8145                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8146                        $co{'parent'} || "--root",
8147                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
8148                        or next;
8149                my @difftree = map { chomp; $_ } <$fd>;
8150                close $fd
8151                        or next;
8152
8153                # print element (entry, item)
8154                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8155                if ($format eq 'rss') {
8156                        print "<item>\n" .
8157                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8158                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8159                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8160                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8161                              "<link>$co_url</link>\n" .
8162                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8163                              "<content:encoded>" .
8164                              "<![CDATA[\n";
8165                } elsif ($format eq 'atom') {
8166                        print "<entry>\n" .
8167                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8168                              "<updated>$cd{'iso-8601'}</updated>\n" .
8169                              "<author>\n" .
8170                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8171                        if ($co{'author_email'}) {
8172                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8173                        }
8174                        print "</author>\n" .
8175                              # use committer for contributor
8176                              "<contributor>\n" .
8177                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8178                        if ($co{'committer_email'}) {
8179                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8180                        }
8181                        print "</contributor>\n" .
8182                              "<published>$cd{'iso-8601'}</published>\n" .
8183                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8184                              "<id>$co_url</id>\n" .
8185                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8186                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8187                }
8188                my $comment = $co{'comment'};
8189                print "<pre>\n";
8190                foreach my $line (@$comment) {
8191                        $line = esc_html($line);
8192                        print "$line\n";
8193                }
8194                print "</pre><ul>\n";
8195                foreach my $difftree_line (@difftree) {
8196                        my %difftree = parse_difftree_raw_line($difftree_line);
8197                        next if !$difftree{'from_id'};
8198
8199                        my $file = $difftree{'file'} || $difftree{'to_file'};
8200
8201                        print "<li>" .
8202                              "[" .
8203                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8204                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8205                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8206                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8207                                      -title => "diff"}, 'D');
8208                        if ($have_blame) {
8209                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8210                                                             file_name=>$file, hash_base=>$commit),
8211                                              -title => "blame"}, 'B');
8212                        }
8213                        # if this is not a feed of a file history
8214                        if (!defined $file_name || $file_name ne $file) {
8215                                print $cgi->a({-href => href(-full=>1, action=>"history",
8216                                                             file_name=>$file, hash=>$commit),
8217                                              -title => "history"}, 'H');
8218                        }
8219                        $file = esc_path($file);
8220                        print "] ".
8221                              "$file</li>\n";
8222                }
8223                if ($format eq 'rss') {
8224                        print "</ul>]]>\n" .
8225                              "</content:encoded>\n" .
8226                              "</item>\n";
8227                } elsif ($format eq 'atom') {
8228                        print "</ul>\n</div>\n" .
8229                              "</content>\n" .
8230                              "</entry>\n";
8231                }
8232        }
8233
8234        # end of feed
8235        if ($format eq 'rss') {
8236                print "</channel>\n</rss>\n";
8237        } elsif ($format eq 'atom') {
8238                print "</feed>\n";
8239        }
8240}
8241
8242sub git_rss {
8243        git_feed('rss');
8244}
8245
8246sub git_atom {
8247        git_feed('atom');
8248}
8249
8250sub git_opml {
8251        my @list = git_get_projects_list($project_filter, $strict_export);
8252        if (!@list) {
8253                die_error(404, "No projects found");
8254        }
8255
8256        print $cgi->header(
8257                -type => 'text/xml',
8258                -charset => 'utf-8',
8259                -content_disposition => 'inline; filename="opml.xml"');
8260
8261        my $title = esc_html($site_name);
8262        my $filter = " within subdirectory ";
8263        if (defined $project_filter) {
8264                $filter .= esc_html($project_filter);
8265        } else {
8266                $filter = "";
8267        }
8268        print <<XML;
8269<?xml version="1.0" encoding="utf-8"?>
8270<opml version="1.0">
8271<head>
8272  <title>$title OPML Export$filter</title>
8273</head>
8274<body>
8275<outline text="git RSS feeds">
8276XML
8277
8278        foreach my $pr (@list) {
8279                my %proj = %$pr;
8280                my $head = git_get_head_hash($proj{'path'});
8281                if (!defined $head) {
8282                        next;
8283                }
8284                $git_dir = "$projectroot/$proj{'path'}";
8285                my %co = parse_commit($head);
8286                if (!%co) {
8287                        next;
8288                }
8289
8290                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8291                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8292                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8293                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8294        }
8295        print <<XML;
8296</outline>
8297</body>
8298</opml>
8299XML
8300}