gitweb / gitweb.perlon commit Merge branch 'bc/prune-info' into maint (f56d036)
   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 { $_ => $_ }
 274                qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 275        # alternate extensions, see /etc/highlight/filetypes.conf
 276        'h' => 'c',
 277        map { $_ => 'sh'  } qw(bash zsh ksh),
 278        map { $_ => 'cpp' } qw(cxx c++ cc),
 279        map { $_ => 'php' } qw(php3 php4 php5 phps),
 280        map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 281        map { $_ => 'make'} qw(mak mk),
 282        map { $_ => 'xml' } qw(xhtml html htm),
 283);
 284
 285# You define site-wide feature defaults here; override them with
 286# $GITWEB_CONFIG as necessary.
 287our %feature = (
 288        # feature => {
 289        #       'sub' => feature-sub (subroutine),
 290        #       'override' => allow-override (boolean),
 291        #       'default' => [ default options...] (array reference)}
 292        #
 293        # if feature is overridable (it means that allow-override has true value),
 294        # then feature-sub will be called with default options as parameters;
 295        # return value of feature-sub indicates if to enable specified feature
 296        #
 297        # if there is no 'sub' key (no feature-sub), then feature cannot be
 298        # overridden
 299        #
 300        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 301        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 302        # is enabled
 303
 304        # Enable the 'blame' blob view, showing the last commit that modified
 305        # each line in the file. This can be very CPU-intensive.
 306
 307        # To enable system wide have in $GITWEB_CONFIG
 308        # $feature{'blame'}{'default'} = [1];
 309        # To have project specific config enable override in $GITWEB_CONFIG
 310        # $feature{'blame'}{'override'} = 1;
 311        # and in project config gitweb.blame = 0|1;
 312        'blame' => {
 313                'sub' => sub { feature_bool('blame', @_) },
 314                'override' => 0,
 315                'default' => [0]},
 316
 317        # Enable the 'snapshot' link, providing a compressed archive of any
 318        # tree. This can potentially generate high traffic if you have large
 319        # project.
 320
 321        # Value is a list of formats defined in %known_snapshot_formats that
 322        # you wish to offer.
 323        # To disable system wide have in $GITWEB_CONFIG
 324        # $feature{'snapshot'}{'default'} = [];
 325        # To have project specific config enable override in $GITWEB_CONFIG
 326        # $feature{'snapshot'}{'override'} = 1;
 327        # and in project config, a comma-separated list of formats or "none"
 328        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 329        'snapshot' => {
 330                'sub' => \&feature_snapshot,
 331                'override' => 0,
 332                'default' => ['tgz']},
 333
 334        # Enable text search, which will list the commits which match author,
 335        # committer or commit text to a given string.  Enabled by default.
 336        # Project specific override is not supported.
 337        #
 338        # Note that this controls all search features, which means that if
 339        # it is disabled, then 'grep' and 'pickaxe' search would also be
 340        # disabled.
 341        'search' => {
 342                'override' => 0,
 343                'default' => [1]},
 344
 345        # Enable grep search, which will list the files in currently selected
 346        # tree containing the given string. Enabled by default. This can be
 347        # potentially CPU-intensive, of course.
 348        # Note that you need to have 'search' feature enabled too.
 349
 350        # To enable system wide have in $GITWEB_CONFIG
 351        # $feature{'grep'}{'default'} = [1];
 352        # To have project specific config enable override in $GITWEB_CONFIG
 353        # $feature{'grep'}{'override'} = 1;
 354        # and in project config gitweb.grep = 0|1;
 355        'grep' => {
 356                'sub' => sub { feature_bool('grep', @_) },
 357                'override' => 0,
 358                'default' => [1]},
 359
 360        # Enable the pickaxe search, which will list the commits that modified
 361        # a given string in a file. This can be practical and quite faster
 362        # alternative to 'blame', but still potentially CPU-intensive.
 363        # Note that you need to have 'search' feature enabled too.
 364
 365        # To enable system wide have in $GITWEB_CONFIG
 366        # $feature{'pickaxe'}{'default'} = [1];
 367        # To have project specific config enable override in $GITWEB_CONFIG
 368        # $feature{'pickaxe'}{'override'} = 1;
 369        # and in project config gitweb.pickaxe = 0|1;
 370        'pickaxe' => {
 371                'sub' => sub { feature_bool('pickaxe', @_) },
 372                'override' => 0,
 373                'default' => [1]},
 374
 375        # Enable showing size of blobs in a 'tree' view, in a separate
 376        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 377
 378        # To disable system wide have in $GITWEB_CONFIG
 379        # $feature{'show-sizes'}{'default'} = [0];
 380        # To have project specific config enable override in $GITWEB_CONFIG
 381        # $feature{'show-sizes'}{'override'} = 1;
 382        # and in project config gitweb.showsizes = 0|1;
 383        'show-sizes' => {
 384                'sub' => sub { feature_bool('showsizes', @_) },
 385                'override' => 0,
 386                'default' => [1]},
 387
 388        # Make gitweb use an alternative format of the URLs which can be
 389        # more readable and natural-looking: project name is embedded
 390        # directly in the path and the query string contains other
 391        # auxiliary information. All gitweb installations recognize
 392        # URL in either format; this configures in which formats gitweb
 393        # generates links.
 394
 395        # To enable system wide have in $GITWEB_CONFIG
 396        # $feature{'pathinfo'}{'default'} = [1];
 397        # Project specific override is not supported.
 398
 399        # Note that you will need to change the default location of CSS,
 400        # favicon, logo and possibly other files to an absolute URL. Also,
 401        # if gitweb.cgi serves as your indexfile, you will need to force
 402        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 403        'pathinfo' => {
 404                'override' => 0,
 405                'default' => [0]},
 406
 407        # Make gitweb consider projects in project root subdirectories
 408        # to be forks of existing projects. Given project $projname.git,
 409        # projects matching $projname/*.git will not be shown in the main
 410        # projects list, instead a '+' mark will be added to $projname
 411        # there and a 'forks' view will be enabled for the project, listing
 412        # all the forks. If project list is taken from a file, forks have
 413        # to be listed after the main project.
 414
 415        # To enable system wide have in $GITWEB_CONFIG
 416        # $feature{'forks'}{'default'} = [1];
 417        # Project specific override is not supported.
 418        'forks' => {
 419                'override' => 0,
 420                'default' => [0]},
 421
 422        # Insert custom links to the action bar of all project pages.
 423        # This enables you mainly to link to third-party scripts integrating
 424        # into gitweb; e.g. git-browser for graphical history representation
 425        # or custom web-based repository administration interface.
 426
 427        # The 'default' value consists of a list of triplets in the form
 428        # (label, link, position) where position is the label after which
 429        # to insert the link and link is a format string where %n expands
 430        # to the project name, %f to the project path within the filesystem,
 431        # %h to the current hash (h gitweb parameter) and %b to the current
 432        # hash base (hb gitweb parameter); %% expands to %.
 433
 434        # To enable system wide have in $GITWEB_CONFIG e.g.
 435        # $feature{'actions'}{'default'} = [('graphiclog',
 436        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 437        # Project specific override is not supported.
 438        'actions' => {
 439                'override' => 0,
 440                'default' => []},
 441
 442        # Allow gitweb scan project content tags of project repository,
 443        # and display the popular Web 2.0-ish "tag cloud" near the projects
 444        # list.  Note that this is something COMPLETELY different from the
 445        # normal Git tags.
 446
 447        # gitweb by itself can show existing tags, but it does not handle
 448        # tagging itself; you need to do it externally, outside gitweb.
 449        # The format is described in git_get_project_ctags() subroutine.
 450        # You may want to install the HTML::TagCloud Perl module to get
 451        # a pretty tag cloud instead of just a list of tags.
 452
 453        # To enable system wide have in $GITWEB_CONFIG
 454        # $feature{'ctags'}{'default'} = [1];
 455        # Project specific override is not supported.
 456
 457        # In the future whether ctags editing is enabled might depend
 458        # on the value, but using 1 should always mean no editing of ctags.
 459        'ctags' => {
 460                'override' => 0,
 461                'default' => [0]},
 462
 463        # The maximum number of patches in a patchset generated in patch
 464        # view. Set this to 0 or undef to disable patch view, or to a
 465        # negative number to remove any limit.
 466
 467        # To disable system wide have in $GITWEB_CONFIG
 468        # $feature{'patches'}{'default'} = [0];
 469        # To have project specific config enable override in $GITWEB_CONFIG
 470        # $feature{'patches'}{'override'} = 1;
 471        # and in project config gitweb.patches = 0|n;
 472        # where n is the maximum number of patches allowed in a patchset.
 473        'patches' => {
 474                'sub' => \&feature_patches,
 475                'override' => 0,
 476                'default' => [16]},
 477
 478        # Avatar support. When this feature is enabled, views such as
 479        # shortlog or commit will display an avatar associated with
 480        # the email of the committer(s) and/or author(s).
 481
 482        # Currently available providers are gravatar and picon.
 483        # If an unknown provider is specified, the feature is disabled.
 484
 485        # Gravatar depends on Digest::MD5.
 486        # Picon currently relies on the indiana.edu database.
 487
 488        # To enable system wide have in $GITWEB_CONFIG
 489        # $feature{'avatar'}{'default'} = ['<provider>'];
 490        # where <provider> is either gravatar or picon.
 491        # To have project specific config enable override in $GITWEB_CONFIG
 492        # $feature{'avatar'}{'override'} = 1;
 493        # and in project config gitweb.avatar = <provider>;
 494        'avatar' => {
 495                'sub' => \&feature_avatar,
 496                'override' => 0,
 497                'default' => ['']},
 498
 499        # Enable displaying how much time and how many git commands
 500        # it took to generate and display page.  Disabled by default.
 501        # Project specific override is not supported.
 502        'timed' => {
 503                'override' => 0,
 504                'default' => [0]},
 505
 506        # Enable turning some links into links to actions which require
 507        # JavaScript to run (like 'blame_incremental').  Not enabled by
 508        # default.  Project specific override is currently not supported.
 509        'javascript-actions' => {
 510                'override' => 0,
 511                'default' => [0]},
 512
 513        # Enable and configure ability to change common timezone for dates
 514        # in gitweb output via JavaScript.  Enabled by default.
 515        # Project specific override is not supported.
 516        'javascript-timezone' => {
 517                'override' => 0,
 518                'default' => [
 519                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 520                                     # or undef to turn off this feature
 521                        'gitweb_tz', # name of cookie where to store selected timezone
 522                        'datetime',  # CSS class used to mark up dates for manipulation
 523                ]},
 524
 525        # Syntax highlighting support. This is based on Daniel Svensson's
 526        # and Sham Chukoury's work in gitweb-xmms2.git.
 527        # It requires the 'highlight' program present in $PATH,
 528        # and therefore is disabled by default.
 529
 530        # To enable system wide have in $GITWEB_CONFIG
 531        # $feature{'highlight'}{'default'} = [1];
 532
 533        'highlight' => {
 534                'sub' => sub { feature_bool('highlight', @_) },
 535                'override' => 0,
 536                'default' => [0]},
 537
 538        # Enable displaying of remote heads in the heads list
 539
 540        # To enable system wide have in $GITWEB_CONFIG
 541        # $feature{'remote_heads'}{'default'} = [1];
 542        # To have project specific config enable override in $GITWEB_CONFIG
 543        # $feature{'remote_heads'}{'override'} = 1;
 544        # and in project config gitweb.remote_heads = 0|1;
 545        'remote_heads' => {
 546                'sub' => sub { feature_bool('remote_heads', @_) },
 547                'override' => 0,
 548                'default' => [0]},
 549);
 550
 551sub gitweb_get_feature {
 552        my ($name) = @_;
 553        return unless exists $feature{$name};
 554        my ($sub, $override, @defaults) = (
 555                $feature{$name}{'sub'},
 556                $feature{$name}{'override'},
 557                @{$feature{$name}{'default'}});
 558        # project specific override is possible only if we have project
 559        our $git_dir; # global variable, declared later
 560        if (!$override || !defined $git_dir) {
 561                return @defaults;
 562        }
 563        if (!defined $sub) {
 564                warn "feature $name is not overridable";
 565                return @defaults;
 566        }
 567        return $sub->(@defaults);
 568}
 569
 570# A wrapper to check if a given feature is enabled.
 571# With this, you can say
 572#
 573#   my $bool_feat = gitweb_check_feature('bool_feat');
 574#   gitweb_check_feature('bool_feat') or somecode;
 575#
 576# instead of
 577#
 578#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 579#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 580#
 581sub gitweb_check_feature {
 582        return (gitweb_get_feature(@_))[0];
 583}
 584
 585
 586sub feature_bool {
 587        my $key = shift;
 588        my ($val) = git_get_project_config($key, '--bool');
 589
 590        if (!defined $val) {
 591                return ($_[0]);
 592        } elsif ($val eq 'true') {
 593                return (1);
 594        } elsif ($val eq 'false') {
 595                return (0);
 596        }
 597}
 598
 599sub feature_snapshot {
 600        my (@fmts) = @_;
 601
 602        my ($val) = git_get_project_config('snapshot');
 603
 604        if ($val) {
 605                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 606        }
 607
 608        return @fmts;
 609}
 610
 611sub feature_patches {
 612        my @val = (git_get_project_config('patches', '--int'));
 613
 614        if (@val) {
 615                return @val;
 616        }
 617
 618        return ($_[0]);
 619}
 620
 621sub feature_avatar {
 622        my @val = (git_get_project_config('avatar'));
 623
 624        return @val ? @val : @_;
 625}
 626
 627# checking HEAD file with -e is fragile if the repository was
 628# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 629# and then pruned.
 630sub check_head_link {
 631        my ($dir) = @_;
 632        my $headfile = "$dir/HEAD";
 633        return ((-e $headfile) ||
 634                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 635}
 636
 637sub check_export_ok {
 638        my ($dir) = @_;
 639        return (check_head_link($dir) &&
 640                (!$export_ok || -e "$dir/$export_ok") &&
 641                (!$export_auth_hook || $export_auth_hook->($dir)));
 642}
 643
 644# process alternate names for backward compatibility
 645# filter out unsupported (unknown) snapshot formats
 646sub filter_snapshot_fmts {
 647        my @fmts = @_;
 648
 649        @fmts = map {
 650                exists $known_snapshot_format_aliases{$_} ?
 651                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 652        @fmts = grep {
 653                exists $known_snapshot_formats{$_} &&
 654                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 655}
 656
 657# If it is set to code reference, it is code that it is to be run once per
 658# request, allowing updating configurations that change with each request,
 659# while running other code in config file only once.
 660#
 661# Otherwise, if it is false then gitweb would process config file only once;
 662# if it is true then gitweb config would be run for each request.
 663our $per_request_config = 1;
 664
 665# read and parse gitweb config file given by its parameter.
 666# returns true on success, false on recoverable error, allowing
 667# to chain this subroutine, using first file that exists.
 668# dies on errors during parsing config file, as it is unrecoverable.
 669sub read_config_file {
 670        my $filename = shift;
 671        return unless defined $filename;
 672        # die if there are errors parsing config file
 673        if (-e $filename) {
 674                do $filename;
 675                die $@ if $@;
 676                return 1;
 677        }
 678        return;
 679}
 680
 681our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 682sub evaluate_gitweb_config {
 683        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 684        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 685        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 686
 687        # Protect agains duplications of file names, to not read config twice.
 688        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 689        # there possibility of duplication of filename there doesn't matter.
 690        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 691        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 692
 693        # Common system-wide settings for convenience.
 694        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 695        read_config_file($GITWEB_CONFIG_COMMON);
 696
 697        # Use first config file that exists.  This means use the per-instance
 698        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 699        read_config_file($GITWEB_CONFIG) and return;
 700        read_config_file($GITWEB_CONFIG_SYSTEM);
 701}
 702
 703# Get loadavg of system, to compare against $maxload.
 704# Currently it requires '/proc/loadavg' present to get loadavg;
 705# if it is not present it returns 0, which means no load checking.
 706sub get_loadavg {
 707        if( -e '/proc/loadavg' ){
 708                open my $fd, '<', '/proc/loadavg'
 709                        or return 0;
 710                my @load = split(/\s+/, scalar <$fd>);
 711                close $fd;
 712
 713                # The first three columns measure CPU and IO utilization of the last one,
 714                # five, and 10 minute periods.  The fourth column shows the number of
 715                # currently running processes and the total number of processes in the m/n
 716                # format.  The last column displays the last process ID used.
 717                return $load[0] || 0;
 718        }
 719        # additional checks for load average should go here for things that don't export
 720        # /proc/loadavg
 721
 722        return 0;
 723}
 724
 725# version of the core git binary
 726our $git_version;
 727sub evaluate_git_version {
 728        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 729        $number_of_git_cmds++;
 730}
 731
 732sub check_loadavg {
 733        if (defined $maxload && get_loadavg() > $maxload) {
 734                die_error(503, "The load average on the server is too high");
 735        }
 736}
 737
 738# ======================================================================
 739# input validation and dispatch
 740
 741# input parameters can be collected from a variety of sources (presently, CGI
 742# and PATH_INFO), so we define an %input_params hash that collects them all
 743# together during validation: this allows subsequent uses (e.g. href()) to be
 744# agnostic of the parameter origin
 745
 746our %input_params = ();
 747
 748# input parameters are stored with the long parameter name as key. This will
 749# also be used in the href subroutine to convert parameters to their CGI
 750# equivalent, and since the href() usage is the most frequent one, we store
 751# the name -> CGI key mapping here, instead of the reverse.
 752#
 753# XXX: Warning: If you touch this, check the search form for updating,
 754# too.
 755
 756our @cgi_param_mapping = (
 757        project => "p",
 758        action => "a",
 759        file_name => "f",
 760        file_parent => "fp",
 761        hash => "h",
 762        hash_parent => "hp",
 763        hash_base => "hb",
 764        hash_parent_base => "hpb",
 765        page => "pg",
 766        order => "o",
 767        searchtext => "s",
 768        searchtype => "st",
 769        snapshot_format => "sf",
 770        extra_options => "opt",
 771        search_use_regexp => "sr",
 772        ctag => "by_tag",
 773        diff_style => "ds",
 774        project_filter => "pf",
 775        # this must be last entry (for manipulation from JavaScript)
 776        javascript => "js"
 777);
 778our %cgi_param_mapping = @cgi_param_mapping;
 779
 780# we will also need to know the possible actions, for validation
 781our %actions = (
 782        "blame" => \&git_blame,
 783        "blame_incremental" => \&git_blame_incremental,
 784        "blame_data" => \&git_blame_data,
 785        "blobdiff" => \&git_blobdiff,
 786        "blobdiff_plain" => \&git_blobdiff_plain,
 787        "blob" => \&git_blob,
 788        "blob_plain" => \&git_blob_plain,
 789        "commitdiff" => \&git_commitdiff,
 790        "commitdiff_plain" => \&git_commitdiff_plain,
 791        "commit" => \&git_commit,
 792        "forks" => \&git_forks,
 793        "heads" => \&git_heads,
 794        "history" => \&git_history,
 795        "log" => \&git_log,
 796        "patch" => \&git_patch,
 797        "patches" => \&git_patches,
 798        "remotes" => \&git_remotes,
 799        "rss" => \&git_rss,
 800        "atom" => \&git_atom,
 801        "search" => \&git_search,
 802        "search_help" => \&git_search_help,
 803        "shortlog" => \&git_shortlog,
 804        "summary" => \&git_summary,
 805        "tag" => \&git_tag,
 806        "tags" => \&git_tags,
 807        "tree" => \&git_tree,
 808        "snapshot" => \&git_snapshot,
 809        "object" => \&git_object,
 810        # those below don't need $project
 811        "opml" => \&git_opml,
 812        "project_list" => \&git_project_list,
 813        "project_index" => \&git_project_index,
 814);
 815
 816# finally, we have the hash of allowed extra_options for the commands that
 817# allow them
 818our %allowed_options = (
 819        "--no-merges" => [ qw(rss atom log shortlog history) ],
 820);
 821
 822# fill %input_params with the CGI parameters. All values except for 'opt'
 823# should be single values, but opt can be an array. We should probably
 824# build an array of parameters that can be multi-valued, but since for the time
 825# being it's only this one, we just single it out
 826sub evaluate_query_params {
 827        our $cgi;
 828
 829        while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                if ($symbol eq 'opt') {
 831                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 832                } else {
 833                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 834                }
 835        }
 836}
 837
 838# now read PATH_INFO and update the parameter list for missing parameters
 839sub evaluate_path_info {
 840        return if defined $input_params{'project'};
 841        return if !$path_info;
 842        $path_info =~ s,^/+,,;
 843        return if !$path_info;
 844
 845        # find which part of PATH_INFO is project
 846        my $project = $path_info;
 847        $project =~ s,/+$,,;
 848        while ($project && !check_head_link("$projectroot/$project")) {
 849                $project =~ s,/*[^/]*$,,;
 850        }
 851        return unless $project;
 852        $input_params{'project'} = $project;
 853
 854        # do not change any parameters if an action is given using the query string
 855        return if $input_params{'action'};
 856        $path_info =~ s,^\Q$project\E/*,,;
 857
 858        # next, check if we have an action
 859        my $action = $path_info;
 860        $action =~ s,/.*$,,;
 861        if (exists $actions{$action}) {
 862                $path_info =~ s,^$action/*,,;
 863                $input_params{'action'} = $action;
 864        }
 865
 866        # list of actions that want hash_base instead of hash, but can have no
 867        # pathname (f) parameter
 868        my @wants_base = (
 869                'tree',
 870                'history',
 871        );
 872
 873        # we want to catch, among others
 874        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 875        my ($parentrefname, $parentpathname, $refname, $pathname) =
 876                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 877
 878        # first, analyze the 'current' part
 879        if (defined $pathname) {
 880                # we got "branch:filename" or "branch:dir/"
 881                # we could use git_get_type(branch:pathname), but:
 882                # - it needs $git_dir
 883                # - it does a git() call
 884                # - the convention of terminating directories with a slash
 885                #   makes it superfluous
 886                # - embedding the action in the PATH_INFO would make it even
 887                #   more superfluous
 888                $pathname =~ s,^/+,,;
 889                if (!$pathname || substr($pathname, -1) eq "/") {
 890                        $input_params{'action'} ||= "tree";
 891                        $pathname =~ s,/$,,;
 892                } else {
 893                        # the default action depends on whether we had parent info
 894                        # or not
 895                        if ($parentrefname) {
 896                                $input_params{'action'} ||= "blobdiff_plain";
 897                        } else {
 898                                $input_params{'action'} ||= "blob_plain";
 899                        }
 900                }
 901                $input_params{'hash_base'} ||= $refname;
 902                $input_params{'file_name'} ||= $pathname;
 903        } elsif (defined $refname) {
 904                # we got "branch". In this case we have to choose if we have to
 905                # set hash or hash_base.
 906                #
 907                # Most of the actions without a pathname only want hash to be
 908                # set, except for the ones specified in @wants_base that want
 909                # hash_base instead. It should also be noted that hand-crafted
 910                # links having 'history' as an action and no pathname or hash
 911                # set will fail, but that happens regardless of PATH_INFO.
 912                if (defined $parentrefname) {
 913                        # if there is parent let the default be 'shortlog' action
 914                        # (for http://git.example.com/repo.git/A..B links); if there
 915                        # is no parent, dispatch will detect type of object and set
 916                        # action appropriately if required (if action is not set)
 917                        $input_params{'action'} ||= "shortlog";
 918                }
 919                if ($input_params{'action'} &&
 920                    grep { $_ eq $input_params{'action'} } @wants_base) {
 921                        $input_params{'hash_base'} ||= $refname;
 922                } else {
 923                        $input_params{'hash'} ||= $refname;
 924                }
 925        }
 926
 927        # next, handle the 'parent' part, if present
 928        if (defined $parentrefname) {
 929                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 930                # someproject/blobdiff/oldrev..newrev:/filename
 931                if ($parentpathname) {
 932                        $parentpathname =~ s,^/+,,;
 933                        $parentpathname =~ s,/$,,;
 934                        $input_params{'file_parent'} ||= $parentpathname;
 935                } else {
 936                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 937                }
 938                # we assume that hash_parent_base is wanted if a path was specified,
 939                # or if the action wants hash_base instead of hash
 940                if (defined $input_params{'file_parent'} ||
 941                        grep { $_ eq $input_params{'action'} } @wants_base) {
 942                        $input_params{'hash_parent_base'} ||= $parentrefname;
 943                } else {
 944                        $input_params{'hash_parent'} ||= $parentrefname;
 945                }
 946        }
 947
 948        # for the snapshot action, we allow URLs in the form
 949        # $project/snapshot/$hash.ext
 950        # where .ext determines the snapshot and gets removed from the
 951        # passed $refname to provide the $hash.
 952        #
 953        # To be able to tell that $refname includes the format extension, we
 954        # require the following two conditions to be satisfied:
 955        # - the hash input parameter MUST have been set from the $refname part
 956        #   of the URL (i.e. they must be equal)
 957        # - the snapshot format MUST NOT have been defined already (e.g. from
 958        #   CGI parameter sf)
 959        # It's also useless to try any matching unless $refname has a dot,
 960        # so we check for that too
 961        if (defined $input_params{'action'} &&
 962                $input_params{'action'} eq 'snapshot' &&
 963                defined $refname && index($refname, '.') != -1 &&
 964                $refname eq $input_params{'hash'} &&
 965                !defined $input_params{'snapshot_format'}) {
 966                # We loop over the known snapshot formats, checking for
 967                # extensions. Allowed extensions are both the defined suffix
 968                # (which includes the initial dot already) and the snapshot
 969                # format key itself, with a prepended dot
 970                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 971                        my $hash = $refname;
 972                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 973                                next;
 974                        }
 975                        my $sfx = $1;
 976                        # a valid suffix was found, so set the snapshot format
 977                        # and reset the hash parameter
 978                        $input_params{'snapshot_format'} = $fmt;
 979                        $input_params{'hash'} = $hash;
 980                        # we also set the format suffix to the one requested
 981                        # in the URL: this way a request for e.g. .tgz returns
 982                        # a .tgz instead of a .tar.gz
 983                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 984                        last;
 985                }
 986        }
 987}
 988
 989our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 990     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 991     $searchtext, $search_regexp, $project_filter);
 992sub evaluate_and_validate_params {
 993        our $action = $input_params{'action'};
 994        if (defined $action) {
 995                if (!validate_action($action)) {
 996                        die_error(400, "Invalid action parameter");
 997                }
 998        }
 999
1000        # parameters which are pathnames
1001        our $project = $input_params{'project'};
1002        if (defined $project) {
1003                if (!validate_project($project)) {
1004                        undef $project;
1005                        die_error(404, "No such project");
1006                }
1007        }
1008
1009        our $project_filter = $input_params{'project_filter'};
1010        if (defined $project_filter) {
1011                if (!validate_pathname($project_filter)) {
1012                        die_error(404, "Invalid project_filter parameter");
1013                }
1014        }
1015
1016        our $file_name = $input_params{'file_name'};
1017        if (defined $file_name) {
1018                if (!validate_pathname($file_name)) {
1019                        die_error(400, "Invalid file parameter");
1020                }
1021        }
1022
1023        our $file_parent = $input_params{'file_parent'};
1024        if (defined $file_parent) {
1025                if (!validate_pathname($file_parent)) {
1026                        die_error(400, "Invalid file parent parameter");
1027                }
1028        }
1029
1030        # parameters which are refnames
1031        our $hash = $input_params{'hash'};
1032        if (defined $hash) {
1033                if (!validate_refname($hash)) {
1034                        die_error(400, "Invalid hash parameter");
1035                }
1036        }
1037
1038        our $hash_parent = $input_params{'hash_parent'};
1039        if (defined $hash_parent) {
1040                if (!validate_refname($hash_parent)) {
1041                        die_error(400, "Invalid hash parent parameter");
1042                }
1043        }
1044
1045        our $hash_base = $input_params{'hash_base'};
1046        if (defined $hash_base) {
1047                if (!validate_refname($hash_base)) {
1048                        die_error(400, "Invalid hash base parameter");
1049                }
1050        }
1051
1052        our @extra_options = @{$input_params{'extra_options'}};
1053        # @extra_options is always defined, since it can only be (currently) set from
1054        # CGI, and $cgi->param() returns the empty array in array context if the param
1055        # is not set
1056        foreach my $opt (@extra_options) {
1057                if (not exists $allowed_options{$opt}) {
1058                        die_error(400, "Invalid option parameter");
1059                }
1060                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1061                        die_error(400, "Invalid option parameter for this action");
1062                }
1063        }
1064
1065        our $hash_parent_base = $input_params{'hash_parent_base'};
1066        if (defined $hash_parent_base) {
1067                if (!validate_refname($hash_parent_base)) {
1068                        die_error(400, "Invalid hash parent base parameter");
1069                }
1070        }
1071
1072        # other parameters
1073        our $page = $input_params{'page'};
1074        if (defined $page) {
1075                if ($page =~ m/[^0-9]/) {
1076                        die_error(400, "Invalid page parameter");
1077                }
1078        }
1079
1080        our $searchtype = $input_params{'searchtype'};
1081        if (defined $searchtype) {
1082                if ($searchtype =~ m/[^a-z]/) {
1083                        die_error(400, "Invalid searchtype parameter");
1084                }
1085        }
1086
1087        our $search_use_regexp = $input_params{'search_use_regexp'};
1088
1089        our $searchtext = $input_params{'searchtext'};
1090        our $search_regexp;
1091        if (defined $searchtext) {
1092                if (length($searchtext) < 2) {
1093                        die_error(403, "At least two characters are required for search parameter");
1094                }
1095                if ($search_use_regexp) {
1096                        $search_regexp = $searchtext;
1097                        if (!eval { qr/$search_regexp/; 1; }) {
1098                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1099                                die_error(400, "Invalid search regexp '$search_regexp'",
1100                                          esc_html($error));
1101                        }
1102                } else {
1103                        $search_regexp = quotemeta $searchtext;
1104                }
1105        }
1106}
1107
1108# path to the current git repository
1109our $git_dir;
1110sub evaluate_git_dir {
1111        our $git_dir = "$projectroot/$project" if $project;
1112}
1113
1114our (@snapshot_fmts, $git_avatar);
1115sub configure_gitweb_features {
1116        # list of supported snapshot formats
1117        our @snapshot_fmts = gitweb_get_feature('snapshot');
1118        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1119
1120        # check that the avatar feature is set to a known provider name,
1121        # and for each provider check if the dependencies are satisfied.
1122        # if the provider name is invalid or the dependencies are not met,
1123        # reset $git_avatar to the empty string.
1124        our ($git_avatar) = gitweb_get_feature('avatar');
1125        if ($git_avatar eq 'gravatar') {
1126                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1127        } elsif ($git_avatar eq 'picon') {
1128                # no dependencies
1129        } else {
1130                $git_avatar = '';
1131        }
1132}
1133
1134# custom error handler: 'die <message>' is Internal Server Error
1135sub handle_errors_html {
1136        my $msg = shift; # it is already HTML escaped
1137
1138        # to avoid infinite loop where error occurs in die_error,
1139        # change handler to default handler, disabling handle_errors_html
1140        set_message("Error occured when inside die_error:\n$msg");
1141
1142        # you cannot jump out of die_error when called as error handler;
1143        # the subroutine set via CGI::Carp::set_message is called _after_
1144        # HTTP headers are already written, so it cannot write them itself
1145        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1146}
1147set_message(\&handle_errors_html);
1148
1149# dispatch
1150sub dispatch {
1151        if (!defined $action) {
1152                if (defined $hash) {
1153                        $action = git_get_type($hash);
1154                        $action or die_error(404, "Object does not exist");
1155                } elsif (defined $hash_base && defined $file_name) {
1156                        $action = git_get_type("$hash_base:$file_name");
1157                        $action or die_error(404, "File or directory does not exist");
1158                } elsif (defined $project) {
1159                        $action = 'summary';
1160                } else {
1161                        $action = 'project_list';
1162                }
1163        }
1164        if (!defined($actions{$action})) {
1165                die_error(400, "Unknown action");
1166        }
1167        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1168            !$project) {
1169                die_error(400, "Project needed");
1170        }
1171        $actions{$action}->();
1172}
1173
1174sub reset_timer {
1175        our $t0 = [ gettimeofday() ]
1176                if defined $t0;
1177        our $number_of_git_cmds = 0;
1178}
1179
1180our $first_request = 1;
1181sub run_request {
1182        reset_timer();
1183
1184        evaluate_uri();
1185        if ($first_request) {
1186                evaluate_gitweb_config();
1187                evaluate_git_version();
1188        }
1189        if ($per_request_config) {
1190                if (ref($per_request_config) eq 'CODE') {
1191                        $per_request_config->();
1192                } elsif (!$first_request) {
1193                        evaluate_gitweb_config();
1194                }
1195        }
1196        check_loadavg();
1197
1198        # $projectroot and $projects_list might be set in gitweb config file
1199        $projects_list ||= $projectroot;
1200
1201        evaluate_query_params();
1202        evaluate_path_info();
1203        evaluate_and_validate_params();
1204        evaluate_git_dir();
1205
1206        configure_gitweb_features();
1207
1208        dispatch();
1209}
1210
1211our $is_last_request = sub { 1 };
1212our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1213our $CGI = 'CGI';
1214our $cgi;
1215sub configure_as_fcgi {
1216        require CGI::Fast;
1217        our $CGI = 'CGI::Fast';
1218
1219        my $request_number = 0;
1220        # let each child service 100 requests
1221        our $is_last_request = sub { ++$request_number > 100 };
1222}
1223sub evaluate_argv {
1224        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1225        configure_as_fcgi()
1226                if $script_name =~ /\.fcgi$/;
1227
1228        return unless (@ARGV);
1229
1230        require Getopt::Long;
1231        Getopt::Long::GetOptions(
1232                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1233                'nproc|n=i' => sub {
1234                        my ($arg, $val) = @_;
1235                        return unless eval { require FCGI::ProcManager; 1; };
1236                        my $proc_manager = FCGI::ProcManager->new({
1237                                n_processes => $val,
1238                        });
1239                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1240                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1241                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1242                },
1243        );
1244}
1245
1246sub run {
1247        evaluate_argv();
1248
1249        $first_request = 1;
1250        $pre_listen_hook->()
1251                if $pre_listen_hook;
1252
1253 REQUEST:
1254        while ($cgi = $CGI->new()) {
1255                $pre_dispatch_hook->()
1256                        if $pre_dispatch_hook;
1257
1258                run_request();
1259
1260                $post_dispatch_hook->()
1261                        if $post_dispatch_hook;
1262                $first_request = 0;
1263
1264                last REQUEST if ($is_last_request->());
1265        }
1266
1267 DONE_GITWEB:
1268        1;
1269}
1270
1271run();
1272
1273if (defined caller) {
1274        # wrapped in a subroutine processing requests,
1275        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1276        return;
1277} else {
1278        # pure CGI script, serving single request
1279        exit;
1280}
1281
1282## ======================================================================
1283## action links
1284
1285# possible values of extra options
1286# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1287# -replay => 1      - start from a current view (replay with modifications)
1288# -path_info => 0|1 - don't use/use path_info URL (if possible)
1289# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1290sub href {
1291        my %params = @_;
1292        # default is to use -absolute url() i.e. $my_uri
1293        my $href = $params{-full} ? $my_url : $my_uri;
1294
1295        # implicit -replay, must be first of implicit params
1296        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1297
1298        $params{'project'} = $project unless exists $params{'project'};
1299
1300        if ($params{-replay}) {
1301                while (my ($name, $symbol) = each %cgi_param_mapping) {
1302                        if (!exists $params{$name}) {
1303                                $params{$name} = $input_params{$name};
1304                        }
1305                }
1306        }
1307
1308        my $use_pathinfo = gitweb_check_feature('pathinfo');
1309        if (defined $params{'project'} &&
1310            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1311                # try to put as many parameters as possible in PATH_INFO:
1312                #   - project name
1313                #   - action
1314                #   - hash_parent or hash_parent_base:/file_parent
1315                #   - hash or hash_base:/filename
1316                #   - the snapshot_format as an appropriate suffix
1317
1318                # When the script is the root DirectoryIndex for the domain,
1319                # $href here would be something like http://gitweb.example.com/
1320                # Thus, we strip any trailing / from $href, to spare us double
1321                # slashes in the final URL
1322                $href =~ s,/$,,;
1323
1324                # Then add the project name, if present
1325                $href .= "/".esc_path_info($params{'project'});
1326                delete $params{'project'};
1327
1328                # since we destructively absorb parameters, we keep this
1329                # boolean that remembers if we're handling a snapshot
1330                my $is_snapshot = $params{'action'} eq 'snapshot';
1331
1332                # Summary just uses the project path URL, any other action is
1333                # added to the URL
1334                if (defined $params{'action'}) {
1335                        $href .= "/".esc_path_info($params{'action'})
1336                                unless $params{'action'} eq 'summary';
1337                        delete $params{'action'};
1338                }
1339
1340                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1341                # stripping nonexistent or useless pieces
1342                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1343                        || $params{'hash_parent'} || $params{'hash'});
1344                if (defined $params{'hash_base'}) {
1345                        if (defined $params{'hash_parent_base'}) {
1346                                $href .= esc_path_info($params{'hash_parent_base'});
1347                                # skip the file_parent if it's the same as the file_name
1348                                if (defined $params{'file_parent'}) {
1349                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1350                                                delete $params{'file_parent'};
1351                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1352                                                $href .= ":/".esc_path_info($params{'file_parent'});
1353                                                delete $params{'file_parent'};
1354                                        }
1355                                }
1356                                $href .= "..";
1357                                delete $params{'hash_parent'};
1358                                delete $params{'hash_parent_base'};
1359                        } elsif (defined $params{'hash_parent'}) {
1360                                $href .= esc_path_info($params{'hash_parent'}). "..";
1361                                delete $params{'hash_parent'};
1362                        }
1363
1364                        $href .= esc_path_info($params{'hash_base'});
1365                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1366                                $href .= ":/".esc_path_info($params{'file_name'});
1367                                delete $params{'file_name'};
1368                        }
1369                        delete $params{'hash'};
1370                        delete $params{'hash_base'};
1371                } elsif (defined $params{'hash'}) {
1372                        $href .= esc_path_info($params{'hash'});
1373                        delete $params{'hash'};
1374                }
1375
1376                # If the action was a snapshot, we can absorb the
1377                # snapshot_format parameter too
1378                if ($is_snapshot) {
1379                        my $fmt = $params{'snapshot_format'};
1380                        # snapshot_format should always be defined when href()
1381                        # is called, but just in case some code forgets, we
1382                        # fall back to the default
1383                        $fmt ||= $snapshot_fmts[0];
1384                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1385                        delete $params{'snapshot_format'};
1386                }
1387        }
1388
1389        # now encode the parameters explicitly
1390        my @result = ();
1391        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1392                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1393                if (defined $params{$name}) {
1394                        if (ref($params{$name}) eq "ARRAY") {
1395                                foreach my $par (@{$params{$name}}) {
1396                                        push @result, $symbol . "=" . esc_param($par);
1397                                }
1398                        } else {
1399                                push @result, $symbol . "=" . esc_param($params{$name});
1400                        }
1401                }
1402        }
1403        $href .= "?" . join(';', @result) if scalar @result;
1404
1405        # final transformation: trailing spaces must be escaped (URI-encoded)
1406        $href =~ s/(\s+)$/CGI::escape($1)/e;
1407
1408        if ($params{-anchor}) {
1409                $href .= "#".esc_param($params{-anchor});
1410        }
1411
1412        return $href;
1413}
1414
1415
1416## ======================================================================
1417## validation, quoting/unquoting and escaping
1418
1419sub validate_action {
1420        my $input = shift || return undef;
1421        return undef unless exists $actions{$input};
1422        return $input;
1423}
1424
1425sub validate_project {
1426        my $input = shift || return undef;
1427        if (!validate_pathname($input) ||
1428                !(-d "$projectroot/$input") ||
1429                !check_export_ok("$projectroot/$input") ||
1430                ($strict_export && !project_in_list($input))) {
1431                return undef;
1432        } else {
1433                return $input;
1434        }
1435}
1436
1437sub validate_pathname {
1438        my $input = shift || return undef;
1439
1440        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1441        # at the beginning, at the end, and between slashes.
1442        # also this catches doubled slashes
1443        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1444                return undef;
1445        }
1446        # no null characters
1447        if ($input =~ m!\0!) {
1448                return undef;
1449        }
1450        return $input;
1451}
1452
1453sub validate_refname {
1454        my $input = shift || return undef;
1455
1456        # textual hashes are O.K.
1457        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1458                return $input;
1459        }
1460        # it must be correct pathname
1461        $input = validate_pathname($input)
1462                or return undef;
1463        # restrictions on ref name according to git-check-ref-format
1464        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1465                return undef;
1466        }
1467        return $input;
1468}
1469
1470# decode sequences of octets in utf8 into Perl's internal form,
1471# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1472# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1473sub to_utf8 {
1474        my $str = shift;
1475        return undef unless defined $str;
1476
1477        if (utf8::is_utf8($str) || utf8::decode($str)) {
1478                return $str;
1479        } else {
1480                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1481        }
1482}
1483
1484# quote unsafe chars, but keep the slash, even when it's not
1485# correct, but quoted slashes look too horrible in bookmarks
1486sub esc_param {
1487        my $str = shift;
1488        return undef unless defined $str;
1489        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1490        $str =~ s/ /\+/g;
1491        return $str;
1492}
1493
1494# the quoting rules for path_info fragment are slightly different
1495sub esc_path_info {
1496        my $str = shift;
1497        return undef unless defined $str;
1498
1499        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1500        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1501
1502        return $str;
1503}
1504
1505# quote unsafe chars in whole URL, so some characters cannot be quoted
1506sub esc_url {
1507        my $str = shift;
1508        return undef unless defined $str;
1509        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1510        $str =~ s/ /\+/g;
1511        return $str;
1512}
1513
1514# quote unsafe characters in HTML attributes
1515sub esc_attr {
1516
1517        # for XHTML conformance escaping '"' to '&quot;' is not enough
1518        return esc_html(@_);
1519}
1520
1521# replace invalid utf8 character with SUBSTITUTION sequence
1522sub esc_html {
1523        my $str = shift;
1524        my %opts = @_;
1525
1526        return undef unless defined $str;
1527
1528        $str = to_utf8($str);
1529        $str = $cgi->escapeHTML($str);
1530        if ($opts{'-nbsp'}) {
1531                $str =~ s/ /&nbsp;/g;
1532        }
1533        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1534        return $str;
1535}
1536
1537# quote control characters and escape filename to HTML
1538sub esc_path {
1539        my $str = shift;
1540        my %opts = @_;
1541
1542        return undef unless defined $str;
1543
1544        $str = to_utf8($str);
1545        $str = $cgi->escapeHTML($str);
1546        if ($opts{'-nbsp'}) {
1547                $str =~ s/ /&nbsp;/g;
1548        }
1549        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1550        return $str;
1551}
1552
1553# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1554sub sanitize {
1555        my $str = shift;
1556
1557        return undef unless defined $str;
1558
1559        $str = to_utf8($str);
1560        $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1561        return $str;
1562}
1563
1564# Make control characters "printable", using character escape codes (CEC)
1565sub quot_cec {
1566        my $cntrl = shift;
1567        my %opts = @_;
1568        my %es = ( # character escape codes, aka escape sequences
1569                "\t" => '\t',   # tab            (HT)
1570                "\n" => '\n',   # line feed      (LF)
1571                "\r" => '\r',   # carrige return (CR)
1572                "\f" => '\f',   # form feed      (FF)
1573                "\b" => '\b',   # backspace      (BS)
1574                "\a" => '\a',   # alarm (bell)   (BEL)
1575                "\e" => '\e',   # escape         (ESC)
1576                "\013" => '\v', # vertical tab   (VT)
1577                "\000" => '\0', # nul character  (NUL)
1578        );
1579        my $chr = ( (exists $es{$cntrl})
1580                    ? $es{$cntrl}
1581                    : sprintf('\%2x', ord($cntrl)) );
1582        if ($opts{-nohtml}) {
1583                return $chr;
1584        } else {
1585                return "<span class=\"cntrl\">$chr</span>";
1586        }
1587}
1588
1589# Alternatively use unicode control pictures codepoints,
1590# Unicode "printable representation" (PR)
1591sub quot_upr {
1592        my $cntrl = shift;
1593        my %opts = @_;
1594
1595        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1596        if ($opts{-nohtml}) {
1597                return $chr;
1598        } else {
1599                return "<span class=\"cntrl\">$chr</span>";
1600        }
1601}
1602
1603# git may return quoted and escaped filenames
1604sub unquote {
1605        my $str = shift;
1606
1607        sub unq {
1608                my $seq = shift;
1609                my %es = ( # character escape codes, aka escape sequences
1610                        't' => "\t",   # tab            (HT, TAB)
1611                        'n' => "\n",   # newline        (NL)
1612                        'r' => "\r",   # return         (CR)
1613                        'f' => "\f",   # form feed      (FF)
1614                        'b' => "\b",   # backspace      (BS)
1615                        'a' => "\a",   # alarm (bell)   (BEL)
1616                        'e' => "\e",   # escape         (ESC)
1617                        'v' => "\013", # vertical tab   (VT)
1618                );
1619
1620                if ($seq =~ m/^[0-7]{1,3}$/) {
1621                        # octal char sequence
1622                        return chr(oct($seq));
1623                } elsif (exists $es{$seq}) {
1624                        # C escape sequence, aka character escape code
1625                        return $es{$seq};
1626                }
1627                # quoted ordinary character
1628                return $seq;
1629        }
1630
1631        if ($str =~ m/^"(.*)"$/) {
1632                # needs unquoting
1633                $str = $1;
1634                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1635        }
1636        return $str;
1637}
1638
1639# escape tabs (convert tabs to spaces)
1640sub untabify {
1641        my $line = shift;
1642
1643        while ((my $pos = index($line, "\t")) != -1) {
1644                if (my $count = (8 - ($pos % 8))) {
1645                        my $spaces = ' ' x $count;
1646                        $line =~ s/\t/$spaces/;
1647                }
1648        }
1649
1650        return $line;
1651}
1652
1653sub project_in_list {
1654        my $project = shift;
1655        my @list = git_get_projects_list();
1656        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1657}
1658
1659## ----------------------------------------------------------------------
1660## HTML aware string manipulation
1661
1662# Try to chop given string on a word boundary between position
1663# $len and $len+$add_len. If there is no word boundary there,
1664# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1665# (marking chopped part) would be longer than given string.
1666sub chop_str {
1667        my $str = shift;
1668        my $len = shift;
1669        my $add_len = shift || 10;
1670        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1671
1672        # Make sure perl knows it is utf8 encoded so we don't
1673        # cut in the middle of a utf8 multibyte char.
1674        $str = to_utf8($str);
1675
1676        # allow only $len chars, but don't cut a word if it would fit in $add_len
1677        # if it doesn't fit, cut it if it's still longer than the dots we would add
1678        # remove chopped character entities entirely
1679
1680        # when chopping in the middle, distribute $len into left and right part
1681        # return early if chopping wouldn't make string shorter
1682        if ($where eq 'center') {
1683                return $str if ($len + 5 >= length($str)); # filler is length 5
1684                $len = int($len/2);
1685        } else {
1686                return $str if ($len + 4 >= length($str)); # filler is length 4
1687        }
1688
1689        # regexps: ending and beginning with word part up to $add_len
1690        my $endre = qr/.{$len}\w{0,$add_len}/;
1691        my $begre = qr/\w{0,$add_len}.{$len}/;
1692
1693        if ($where eq 'left') {
1694                $str =~ m/^(.*?)($begre)$/;
1695                my ($lead, $body) = ($1, $2);
1696                if (length($lead) > 4) {
1697                        $lead = " ...";
1698                }
1699                return "$lead$body";
1700
1701        } elsif ($where eq 'center') {
1702                $str =~ m/^($endre)(.*)$/;
1703                my ($left, $str)  = ($1, $2);
1704                $str =~ m/^(.*?)($begre)$/;
1705                my ($mid, $right) = ($1, $2);
1706                if (length($mid) > 5) {
1707                        $mid = " ... ";
1708                }
1709                return "$left$mid$right";
1710
1711        } else {
1712                $str =~ m/^($endre)(.*)$/;
1713                my $body = $1;
1714                my $tail = $2;
1715                if (length($tail) > 4) {
1716                        $tail = "... ";
1717                }
1718                return "$body$tail";
1719        }
1720}
1721
1722# takes the same arguments as chop_str, but also wraps a <span> around the
1723# result with a title attribute if it does get chopped. Additionally, the
1724# string is HTML-escaped.
1725sub chop_and_escape_str {
1726        my ($str) = @_;
1727
1728        my $chopped = chop_str(@_);
1729        $str = to_utf8($str);
1730        if ($chopped eq $str) {
1731                return esc_html($chopped);
1732        } else {
1733                $str =~ s/[[:cntrl:]]/?/g;
1734                return $cgi->span({-title=>$str}, esc_html($chopped));
1735        }
1736}
1737
1738# Highlight selected fragments of string, using given CSS class,
1739# and escape HTML.  It is assumed that fragments do not overlap.
1740# Regions are passed as list of pairs (array references).
1741#
1742# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1743# '<span class="mark">foo</span>bar'
1744sub esc_html_hl_regions {
1745        my ($str, $css_class, @sel) = @_;
1746        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1747        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1748        return esc_html($str, %opts) unless @sel;
1749
1750        my $out = '';
1751        my $pos = 0;
1752
1753        for my $s (@sel) {
1754                my ($begin, $end) = @$s;
1755
1756                # Don't create empty <span> elements.
1757                next if $end <= $begin;
1758
1759                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1760                                       %opts);
1761
1762                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1763                        if ($begin - $pos > 0);
1764                $out .= $cgi->span({-class => $css_class}, $escaped);
1765
1766                $pos = $end;
1767        }
1768        $out .= esc_html(substr($str, $pos), %opts)
1769                if ($pos < length($str));
1770
1771        return $out;
1772}
1773
1774# return positions of beginning and end of each match
1775sub matchpos_list {
1776        my ($str, $regexp) = @_;
1777        return unless (defined $str && defined $regexp);
1778
1779        my @matches;
1780        while ($str =~ /$regexp/g) {
1781                push @matches, [$-[0], $+[0]];
1782        }
1783        return @matches;
1784}
1785
1786# highlight match (if any), and escape HTML
1787sub esc_html_match_hl {
1788        my ($str, $regexp) = @_;
1789        return esc_html($str) unless defined $regexp;
1790
1791        my @matches = matchpos_list($str, $regexp);
1792        return esc_html($str) unless @matches;
1793
1794        return esc_html_hl_regions($str, 'match', @matches);
1795}
1796
1797
1798# highlight match (if any) of shortened string, and escape HTML
1799sub esc_html_match_hl_chopped {
1800        my ($str, $chopped, $regexp) = @_;
1801        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1802
1803        my @matches = matchpos_list($str, $regexp);
1804        return esc_html($chopped) unless @matches;
1805
1806        # filter matches so that we mark chopped string
1807        my $tail = "... "; # see chop_str
1808        unless ($chopped =~ s/\Q$tail\E$//) {
1809                $tail = '';
1810        }
1811        my $chop_len = length($chopped);
1812        my $tail_len = length($tail);
1813        my @filtered;
1814
1815        for my $m (@matches) {
1816                if ($m->[0] > $chop_len) {
1817                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1818                        last;
1819                } elsif ($m->[1] > $chop_len) {
1820                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1821                        last;
1822                }
1823                push @filtered, $m;
1824        }
1825
1826        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1827}
1828
1829## ----------------------------------------------------------------------
1830## functions returning short strings
1831
1832# CSS class for given age value (in seconds)
1833sub age_class {
1834        my $age = shift;
1835
1836        if (!defined $age) {
1837                return "noage";
1838        } elsif ($age < 60*60*2) {
1839                return "age0";
1840        } elsif ($age < 60*60*24*2) {
1841                return "age1";
1842        } else {
1843                return "age2";
1844        }
1845}
1846
1847# convert age in seconds to "nn units ago" string
1848sub age_string {
1849        my $age = shift;
1850        my $age_str;
1851
1852        if ($age > 60*60*24*365*2) {
1853                $age_str = (int $age/60/60/24/365);
1854                $age_str .= " years ago";
1855        } elsif ($age > 60*60*24*(365/12)*2) {
1856                $age_str = int $age/60/60/24/(365/12);
1857                $age_str .= " months ago";
1858        } elsif ($age > 60*60*24*7*2) {
1859                $age_str = int $age/60/60/24/7;
1860                $age_str .= " weeks ago";
1861        } elsif ($age > 60*60*24*2) {
1862                $age_str = int $age/60/60/24;
1863                $age_str .= " days ago";
1864        } elsif ($age > 60*60*2) {
1865                $age_str = int $age/60/60;
1866                $age_str .= " hours ago";
1867        } elsif ($age > 60*2) {
1868                $age_str = int $age/60;
1869                $age_str .= " min ago";
1870        } elsif ($age > 2) {
1871                $age_str = int $age;
1872                $age_str .= " sec ago";
1873        } else {
1874                $age_str .= " right now";
1875        }
1876        return $age_str;
1877}
1878
1879use constant {
1880        S_IFINVALID => 0030000,
1881        S_IFGITLINK => 0160000,
1882};
1883
1884# submodule/subproject, a commit object reference
1885sub S_ISGITLINK {
1886        my $mode = shift;
1887
1888        return (($mode & S_IFMT) == S_IFGITLINK)
1889}
1890
1891# convert file mode in octal to symbolic file mode string
1892sub mode_str {
1893        my $mode = oct shift;
1894
1895        if (S_ISGITLINK($mode)) {
1896                return 'm---------';
1897        } elsif (S_ISDIR($mode & S_IFMT)) {
1898                return 'drwxr-xr-x';
1899        } elsif (S_ISLNK($mode)) {
1900                return 'lrwxrwxrwx';
1901        } elsif (S_ISREG($mode)) {
1902                # git cares only about the executable bit
1903                if ($mode & S_IXUSR) {
1904                        return '-rwxr-xr-x';
1905                } else {
1906                        return '-rw-r--r--';
1907                };
1908        } else {
1909                return '----------';
1910        }
1911}
1912
1913# convert file mode in octal to file type string
1914sub file_type {
1915        my $mode = shift;
1916
1917        if ($mode !~ m/^[0-7]+$/) {
1918                return $mode;
1919        } else {
1920                $mode = oct $mode;
1921        }
1922
1923        if (S_ISGITLINK($mode)) {
1924                return "submodule";
1925        } elsif (S_ISDIR($mode & S_IFMT)) {
1926                return "directory";
1927        } elsif (S_ISLNK($mode)) {
1928                return "symlink";
1929        } elsif (S_ISREG($mode)) {
1930                return "file";
1931        } else {
1932                return "unknown";
1933        }
1934}
1935
1936# convert file mode in octal to file type description string
1937sub file_type_long {
1938        my $mode = shift;
1939
1940        if ($mode !~ m/^[0-7]+$/) {
1941                return $mode;
1942        } else {
1943                $mode = oct $mode;
1944        }
1945
1946        if (S_ISGITLINK($mode)) {
1947                return "submodule";
1948        } elsif (S_ISDIR($mode & S_IFMT)) {
1949                return "directory";
1950        } elsif (S_ISLNK($mode)) {
1951                return "symlink";
1952        } elsif (S_ISREG($mode)) {
1953                if ($mode & S_IXUSR) {
1954                        return "executable";
1955                } else {
1956                        return "file";
1957                };
1958        } else {
1959                return "unknown";
1960        }
1961}
1962
1963
1964## ----------------------------------------------------------------------
1965## functions returning short HTML fragments, or transforming HTML fragments
1966## which don't belong to other sections
1967
1968# format line of commit message.
1969sub format_log_line_html {
1970        my $line = shift;
1971
1972        $line = esc_html($line, -nbsp=>1);
1973        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1974                $cgi->a({-href => href(action=>"object", hash=>$1),
1975                                        -class => "text"}, $1);
1976        }eg;
1977
1978        return $line;
1979}
1980
1981# format marker of refs pointing to given object
1982
1983# the destination action is chosen based on object type and current context:
1984# - for annotated tags, we choose the tag view unless it's the current view
1985#   already, in which case we go to shortlog view
1986# - for other refs, we keep the current view if we're in history, shortlog or
1987#   log view, and select shortlog otherwise
1988sub format_ref_marker {
1989        my ($refs, $id) = @_;
1990        my $markers = '';
1991
1992        if (defined $refs->{$id}) {
1993                foreach my $ref (@{$refs->{$id}}) {
1994                        # this code exploits the fact that non-lightweight tags are the
1995                        # only indirect objects, and that they are the only objects for which
1996                        # we want to use tag instead of shortlog as action
1997                        my ($type, $name) = qw();
1998                        my $indirect = ($ref =~ s/\^\{\}$//);
1999                        # e.g. tags/v2.6.11 or heads/next
2000                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
2001                                $type = $1;
2002                                $name = $2;
2003                        } else {
2004                                $type = "ref";
2005                                $name = $ref;
2006                        }
2007
2008                        my $class = $type;
2009                        $class .= " indirect" if $indirect;
2010
2011                        my $dest_action = "shortlog";
2012
2013                        if ($indirect) {
2014                                $dest_action = "tag" unless $action eq "tag";
2015                        } elsif ($action =~ /^(history|(short)?log)$/) {
2016                                $dest_action = $action;
2017                        }
2018
2019                        my $dest = "";
2020                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2021                        $dest .= $ref;
2022
2023                        my $link = $cgi->a({
2024                                -href => href(
2025                                        action=>$dest_action,
2026                                        hash=>$dest
2027                                )}, $name);
2028
2029                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2030                                $link . "</span>";
2031                }
2032        }
2033
2034        if ($markers) {
2035                return ' <span class="refs">'. $markers . '</span>';
2036        } else {
2037                return "";
2038        }
2039}
2040
2041# format, perhaps shortened and with markers, title line
2042sub format_subject_html {
2043        my ($long, $short, $href, $extra) = @_;
2044        $extra = '' unless defined($extra);
2045
2046        if (length($short) < length($long)) {
2047                $long =~ s/[[:cntrl:]]/?/g;
2048                return $cgi->a({-href => $href, -class => "list subject",
2049                                -title => to_utf8($long)},
2050                       esc_html($short)) . $extra;
2051        } else {
2052                return $cgi->a({-href => $href, -class => "list subject"},
2053                       esc_html($long)) . $extra;
2054        }
2055}
2056
2057# Rather than recomputing the url for an email multiple times, we cache it
2058# after the first hit. This gives a visible benefit in views where the avatar
2059# for the same email is used repeatedly (e.g. shortlog).
2060# The cache is shared by all avatar engines (currently gravatar only), which
2061# are free to use it as preferred. Since only one avatar engine is used for any
2062# given page, there's no risk for cache conflicts.
2063our %avatar_cache = ();
2064
2065# Compute the picon url for a given email, by using the picon search service over at
2066# http://www.cs.indiana.edu/picons/search.html
2067sub picon_url {
2068        my $email = lc shift;
2069        if (!$avatar_cache{$email}) {
2070                my ($user, $domain) = split('@', $email);
2071                $avatar_cache{$email} =
2072                        "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2073                        "$domain/$user/" .
2074                        "users+domains+unknown/up/single";
2075        }
2076        return $avatar_cache{$email};
2077}
2078
2079# Compute the gravatar url for a given email, if it's not in the cache already.
2080# Gravatar stores only the part of the URL before the size, since that's the
2081# one computationally more expensive. This also allows reuse of the cache for
2082# different sizes (for this particular engine).
2083sub gravatar_url {
2084        my $email = lc shift;
2085        my $size = shift;
2086        $avatar_cache{$email} ||=
2087                "http://www.gravatar.com/avatar/" .
2088                        Digest::MD5::md5_hex($email) . "?s=";
2089        return $avatar_cache{$email} . $size;
2090}
2091
2092# Insert an avatar for the given $email at the given $size if the feature
2093# is enabled.
2094sub git_get_avatar {
2095        my ($email, %opts) = @_;
2096        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2097        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2098        $opts{-size} ||= 'default';
2099        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2100        my $url = "";
2101        if ($git_avatar eq 'gravatar') {
2102                $url = gravatar_url($email, $size);
2103        } elsif ($git_avatar eq 'picon') {
2104                $url = picon_url($email);
2105        }
2106        # Other providers can be added by extending the if chain, defining $url
2107        # as needed. If no variant puts something in $url, we assume avatars
2108        # are completely disabled/unavailable.
2109        if ($url) {
2110                return $pre_white .
2111                       "<img width=\"$size\" " .
2112                            "class=\"avatar\" " .
2113                            "src=\"".esc_url($url)."\" " .
2114                            "alt=\"\" " .
2115                       "/>" . $post_white;
2116        } else {
2117                return "";
2118        }
2119}
2120
2121sub format_search_author {
2122        my ($author, $searchtype, $displaytext) = @_;
2123        my $have_search = gitweb_check_feature('search');
2124
2125        if ($have_search) {
2126                my $performed = "";
2127                if ($searchtype eq 'author') {
2128                        $performed = "authored";
2129                } elsif ($searchtype eq 'committer') {
2130                        $performed = "committed";
2131                }
2132
2133                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2134                                searchtext=>$author,
2135                                searchtype=>$searchtype), class=>"list",
2136                                title=>"Search for commits $performed by $author"},
2137                                $displaytext);
2138
2139        } else {
2140                return $displaytext;
2141        }
2142}
2143
2144# format the author name of the given commit with the given tag
2145# the author name is chopped and escaped according to the other
2146# optional parameters (see chop_str).
2147sub format_author_html {
2148        my $tag = shift;
2149        my $co = shift;
2150        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2151        return "<$tag class=\"author\">" .
2152               format_search_author($co->{'author_name'}, "author",
2153                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2154                       $author) .
2155               "</$tag>";
2156}
2157
2158# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2159sub format_git_diff_header_line {
2160        my $line = shift;
2161        my $diffinfo = shift;
2162        my ($from, $to) = @_;
2163
2164        if ($diffinfo->{'nparents'}) {
2165                # combined diff
2166                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2167                if ($to->{'href'}) {
2168                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2169                                         esc_path($to->{'file'}));
2170                } else { # file was deleted (no href)
2171                        $line .= esc_path($to->{'file'});
2172                }
2173        } else {
2174                # "ordinary" diff
2175                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2176                if ($from->{'href'}) {
2177                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2178                                         'a/' . esc_path($from->{'file'}));
2179                } else { # file was added (no href)
2180                        $line .= 'a/' . esc_path($from->{'file'});
2181                }
2182                $line .= ' ';
2183                if ($to->{'href'}) {
2184                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2185                                         'b/' . esc_path($to->{'file'}));
2186                } else { # file was deleted
2187                        $line .= 'b/' . esc_path($to->{'file'});
2188                }
2189        }
2190
2191        return "<div class=\"diff header\">$line</div>\n";
2192}
2193
2194# format extended diff header line, before patch itself
2195sub format_extended_diff_header_line {
2196        my $line = shift;
2197        my $diffinfo = shift;
2198        my ($from, $to) = @_;
2199
2200        # match <path>
2201        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2202                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2203                                       esc_path($from->{'file'}));
2204        }
2205        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2206                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2207                                 esc_path($to->{'file'}));
2208        }
2209        # match single <mode>
2210        if ($line =~ m/\s(\d{6})$/) {
2211                $line .= '<span class="info"> (' .
2212                         file_type_long($1) .
2213                         ')</span>';
2214        }
2215        # match <hash>
2216        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2217                # can match only for combined diff
2218                $line = 'index ';
2219                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2220                        if ($from->{'href'}[$i]) {
2221                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2222                                                  -class=>"hash"},
2223                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2224                        } else {
2225                                $line .= '0' x 7;
2226                        }
2227                        # separator
2228                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2229                }
2230                $line .= '..';
2231                if ($to->{'href'}) {
2232                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2233                                         substr($diffinfo->{'to_id'},0,7));
2234                } else {
2235                        $line .= '0' x 7;
2236                }
2237
2238        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2239                # can match only for ordinary diff
2240                my ($from_link, $to_link);
2241                if ($from->{'href'}) {
2242                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2243                                             substr($diffinfo->{'from_id'},0,7));
2244                } else {
2245                        $from_link = '0' x 7;
2246                }
2247                if ($to->{'href'}) {
2248                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2249                                           substr($diffinfo->{'to_id'},0,7));
2250                } else {
2251                        $to_link = '0' x 7;
2252                }
2253                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2254                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2255        }
2256
2257        return $line . "<br/>\n";
2258}
2259
2260# format from-file/to-file diff header
2261sub format_diff_from_to_header {
2262        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2263        my $line;
2264        my $result = '';
2265
2266        $line = $from_line;
2267        #assert($line =~ m/^---/) if DEBUG;
2268        # no extra formatting for "^--- /dev/null"
2269        if (! $diffinfo->{'nparents'}) {
2270                # ordinary (single parent) diff
2271                if ($line =~ m!^--- "?a/!) {
2272                        if ($from->{'href'}) {
2273                                $line = '--- a/' .
2274                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2275                                                esc_path($from->{'file'}));
2276                        } else {
2277                                $line = '--- a/' .
2278                                        esc_path($from->{'file'});
2279                        }
2280                }
2281                $result .= qq!<div class="diff from_file">$line</div>\n!;
2282
2283        } else {
2284                # combined diff (merge commit)
2285                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2286                        if ($from->{'href'}[$i]) {
2287                                $line = '--- ' .
2288                                        $cgi->a({-href=>href(action=>"blobdiff",
2289                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2290                                                             hash_parent_base=>$parents[$i],
2291                                                             file_parent=>$from->{'file'}[$i],
2292                                                             hash=>$diffinfo->{'to_id'},
2293                                                             hash_base=>$hash,
2294                                                             file_name=>$to->{'file'}),
2295                                                 -class=>"path",
2296                                                 -title=>"diff" . ($i+1)},
2297                                                $i+1) .
2298                                        '/' .
2299                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2300                                                esc_path($from->{'file'}[$i]));
2301                        } else {
2302                                $line = '--- /dev/null';
2303                        }
2304                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2305                }
2306        }
2307
2308        $line = $to_line;
2309        #assert($line =~ m/^\+\+\+/) if DEBUG;
2310        # no extra formatting for "^+++ /dev/null"
2311        if ($line =~ m!^\+\+\+ "?b/!) {
2312                if ($to->{'href'}) {
2313                        $line = '+++ b/' .
2314                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2315                                        esc_path($to->{'file'}));
2316                } else {
2317                        $line = '+++ b/' .
2318                                esc_path($to->{'file'});
2319                }
2320        }
2321        $result .= qq!<div class="diff to_file">$line</div>\n!;
2322
2323        return $result;
2324}
2325
2326# create note for patch simplified by combined diff
2327sub format_diff_cc_simplified {
2328        my ($diffinfo, @parents) = @_;
2329        my $result = '';
2330
2331        $result .= "<div class=\"diff header\">" .
2332                   "diff --cc ";
2333        if (!is_deleted($diffinfo)) {
2334                $result .= $cgi->a({-href => href(action=>"blob",
2335                                                  hash_base=>$hash,
2336                                                  hash=>$diffinfo->{'to_id'},
2337                                                  file_name=>$diffinfo->{'to_file'}),
2338                                    -class => "path"},
2339                                   esc_path($diffinfo->{'to_file'}));
2340        } else {
2341                $result .= esc_path($diffinfo->{'to_file'});
2342        }
2343        $result .= "</div>\n" . # class="diff header"
2344                   "<div class=\"diff nodifferences\">" .
2345                   "Simple merge" .
2346                   "</div>\n"; # class="diff nodifferences"
2347
2348        return $result;
2349}
2350
2351sub diff_line_class {
2352        my ($line, $from, $to) = @_;
2353
2354        # ordinary diff
2355        my $num_sign = 1;
2356        # combined diff
2357        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2358                $num_sign = scalar @{$from->{'href'}};
2359        }
2360
2361        my @diff_line_classifier = (
2362                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2363                { regexp => qr/^\\/,               class => "incomplete"  },
2364                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2365                # classifier for context must come before classifier add/rem,
2366                # or we would have to use more complicated regexp, for example
2367                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2368                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2369                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2370        );
2371        for my $clsfy (@diff_line_classifier) {
2372                return $clsfy->{'class'}
2373                        if ($line =~ $clsfy->{'regexp'});
2374        }
2375
2376        # fallback
2377        return "";
2378}
2379
2380# assumes that $from and $to are defined and correctly filled,
2381# and that $line holds a line of chunk header for unified diff
2382sub format_unidiff_chunk_header {
2383        my ($line, $from, $to) = @_;
2384
2385        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2386                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2387
2388        $from_lines = 0 unless defined $from_lines;
2389        $to_lines   = 0 unless defined $to_lines;
2390
2391        if ($from->{'href'}) {
2392                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2393                                     -class=>"list"}, $from_text);
2394        }
2395        if ($to->{'href'}) {
2396                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2397                                     -class=>"list"}, $to_text);
2398        }
2399        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2400                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2401        return $line;
2402}
2403
2404# assumes that $from and $to are defined and correctly filled,
2405# and that $line holds a line of chunk header for combined diff
2406sub format_cc_diff_chunk_header {
2407        my ($line, $from, $to) = @_;
2408
2409        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2410        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2411
2412        @from_text = split(' ', $ranges);
2413        for (my $i = 0; $i < @from_text; ++$i) {
2414                ($from_start[$i], $from_nlines[$i]) =
2415                        (split(',', substr($from_text[$i], 1)), 0);
2416        }
2417
2418        $to_text   = pop @from_text;
2419        $to_start  = pop @from_start;
2420        $to_nlines = pop @from_nlines;
2421
2422        $line = "<span class=\"chunk_info\">$prefix ";
2423        for (my $i = 0; $i < @from_text; ++$i) {
2424                if ($from->{'href'}[$i]) {
2425                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2426                                          -class=>"list"}, $from_text[$i]);
2427                } else {
2428                        $line .= $from_text[$i];
2429                }
2430                $line .= " ";
2431        }
2432        if ($to->{'href'}) {
2433                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2434                                  -class=>"list"}, $to_text);
2435        } else {
2436                $line .= $to_text;
2437        }
2438        $line .= " $prefix</span>" .
2439                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2440        return $line;
2441}
2442
2443# process patch (diff) line (not to be used for diff headers),
2444# returning HTML-formatted (but not wrapped) line.
2445# If the line is passed as a reference, it is treated as HTML and not
2446# esc_html()'ed.
2447sub format_diff_line {
2448        my ($line, $diff_class, $from, $to) = @_;
2449
2450        if (ref($line)) {
2451                $line = $$line;
2452        } else {
2453                chomp $line;
2454                $line = untabify($line);
2455
2456                if ($from && $to && $line =~ m/^\@{2} /) {
2457                        $line = format_unidiff_chunk_header($line, $from, $to);
2458                } elsif ($from && $to && $line =~ m/^\@{3}/) {
2459                        $line = format_cc_diff_chunk_header($line, $from, $to);
2460                } else {
2461                        $line = esc_html($line, -nbsp=>1);
2462                }
2463        }
2464
2465        my $diff_classes = "diff";
2466        $diff_classes .= " $diff_class" if ($diff_class);
2467        $line = "<div class=\"$diff_classes\">$line</div>\n";
2468
2469        return $line;
2470}
2471
2472# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2473# linked.  Pass the hash of the tree/commit to snapshot.
2474sub format_snapshot_links {
2475        my ($hash) = @_;
2476        my $num_fmts = @snapshot_fmts;
2477        if ($num_fmts > 1) {
2478                # A parenthesized list of links bearing format names.
2479                # e.g. "snapshot (_tar.gz_ _zip_)"
2480                return "snapshot (" . join(' ', map
2481                        $cgi->a({
2482                                -href => href(
2483                                        action=>"snapshot",
2484                                        hash=>$hash,
2485                                        snapshot_format=>$_
2486                                )
2487                        }, $known_snapshot_formats{$_}{'display'})
2488                , @snapshot_fmts) . ")";
2489        } elsif ($num_fmts == 1) {
2490                # A single "snapshot" link whose tooltip bears the format name.
2491                # i.e. "_snapshot_"
2492                my ($fmt) = @snapshot_fmts;
2493                return
2494                        $cgi->a({
2495                                -href => href(
2496                                        action=>"snapshot",
2497                                        hash=>$hash,
2498                                        snapshot_format=>$fmt
2499                                ),
2500                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2501                        }, "snapshot");
2502        } else { # $num_fmts == 0
2503                return undef;
2504        }
2505}
2506
2507## ......................................................................
2508## functions returning values to be passed, perhaps after some
2509## transformation, to other functions; e.g. returning arguments to href()
2510
2511# returns hash to be passed to href to generate gitweb URL
2512# in -title key it returns description of link
2513sub get_feed_info {
2514        my $format = shift || 'Atom';
2515        my %res = (action => lc($format));
2516
2517        # feed links are possible only for project views
2518        return unless (defined $project);
2519        # some views should link to OPML, or to generic project feed,
2520        # or don't have specific feed yet (so they should use generic)
2521        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2522
2523        my $branch;
2524        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2525        # from tag links; this also makes possible to detect branch links
2526        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2527            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2528                $branch = $1;
2529        }
2530        # find log type for feed description (title)
2531        my $type = 'log';
2532        if (defined $file_name) {
2533                $type  = "history of $file_name";
2534                $type .= "/" if ($action eq 'tree');
2535                $type .= " on '$branch'" if (defined $branch);
2536        } else {
2537                $type = "log of $branch" if (defined $branch);
2538        }
2539
2540        $res{-title} = $type;
2541        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2542        $res{'file_name'} = $file_name;
2543
2544        return %res;
2545}
2546
2547## ----------------------------------------------------------------------
2548## git utility subroutines, invoking git commands
2549
2550# returns path to the core git executable and the --git-dir parameter as list
2551sub git_cmd {
2552        $number_of_git_cmds++;
2553        return $GIT, '--git-dir='.$git_dir;
2554}
2555
2556# quote the given arguments for passing them to the shell
2557# quote_command("command", "arg 1", "arg with ' and ! characters")
2558# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2559# Try to avoid using this function wherever possible.
2560sub quote_command {
2561        return join(' ',
2562                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2563}
2564
2565# get HEAD ref of given project as hash
2566sub git_get_head_hash {
2567        return git_get_full_hash(shift, 'HEAD');
2568}
2569
2570sub git_get_full_hash {
2571        return git_get_hash(@_);
2572}
2573
2574sub git_get_short_hash {
2575        return git_get_hash(@_, '--short=7');
2576}
2577
2578sub git_get_hash {
2579        my ($project, $hash, @options) = @_;
2580        my $o_git_dir = $git_dir;
2581        my $retval = undef;
2582        $git_dir = "$projectroot/$project";
2583        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2584            '--verify', '-q', @options, $hash) {
2585                $retval = <$fd>;
2586                chomp $retval if defined $retval;
2587                close $fd;
2588        }
2589        if (defined $o_git_dir) {
2590                $git_dir = $o_git_dir;
2591        }
2592        return $retval;
2593}
2594
2595# get type of given object
2596sub git_get_type {
2597        my $hash = shift;
2598
2599        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2600        my $type = <$fd>;
2601        close $fd or return;
2602        chomp $type;
2603        return $type;
2604}
2605
2606# repository configuration
2607our $config_file = '';
2608our %config;
2609
2610# store multiple values for single key as anonymous array reference
2611# single values stored directly in the hash, not as [ <value> ]
2612sub hash_set_multi {
2613        my ($hash, $key, $value) = @_;
2614
2615        if (!exists $hash->{$key}) {
2616                $hash->{$key} = $value;
2617        } elsif (!ref $hash->{$key}) {
2618                $hash->{$key} = [ $hash->{$key}, $value ];
2619        } else {
2620                push @{$hash->{$key}}, $value;
2621        }
2622}
2623
2624# return hash of git project configuration
2625# optionally limited to some section, e.g. 'gitweb'
2626sub git_parse_project_config {
2627        my $section_regexp = shift;
2628        my %config;
2629
2630        local $/ = "\0";
2631
2632        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2633                or return;
2634
2635        while (my $keyval = <$fh>) {
2636                chomp $keyval;
2637                my ($key, $value) = split(/\n/, $keyval, 2);
2638
2639                hash_set_multi(\%config, $key, $value)
2640                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2641        }
2642        close $fh;
2643
2644        return %config;
2645}
2646
2647# convert config value to boolean: 'true' or 'false'
2648# no value, number > 0, 'true' and 'yes' values are true
2649# rest of values are treated as false (never as error)
2650sub config_to_bool {
2651        my $val = shift;
2652
2653        return 1 if !defined $val;             # section.key
2654
2655        # strip leading and trailing whitespace
2656        $val =~ s/^\s+//;
2657        $val =~ s/\s+$//;
2658
2659        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2660                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2661}
2662
2663# convert config value to simple decimal number
2664# an optional value suffix of 'k', 'm', or 'g' will cause the value
2665# to be multiplied by 1024, 1048576, or 1073741824
2666sub config_to_int {
2667        my $val = shift;
2668
2669        # strip leading and trailing whitespace
2670        $val =~ s/^\s+//;
2671        $val =~ s/\s+$//;
2672
2673        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2674                $unit = lc($unit);
2675                # unknown unit is treated as 1
2676                return $num * ($unit eq 'g' ? 1073741824 :
2677                               $unit eq 'm' ?    1048576 :
2678                               $unit eq 'k' ?       1024 : 1);
2679        }
2680        return $val;
2681}
2682
2683# convert config value to array reference, if needed
2684sub config_to_multi {
2685        my $val = shift;
2686
2687        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2688}
2689
2690sub git_get_project_config {
2691        my ($key, $type) = @_;
2692
2693        return unless defined $git_dir;
2694
2695        # key sanity check
2696        return unless ($key);
2697        # only subsection, if exists, is case sensitive,
2698        # and not lowercased by 'git config -z -l'
2699        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2700                $key = join(".", lc($hi), $mi, lc($lo));
2701        } else {
2702                $key = lc($key);
2703        }
2704        $key =~ s/^gitweb\.//;
2705        return if ($key =~ m/\W/);
2706
2707        # type sanity check
2708        if (defined $type) {
2709                $type =~ s/^--//;
2710                $type = undef
2711                        unless ($type eq 'bool' || $type eq 'int');
2712        }
2713
2714        # get config
2715        if (!defined $config_file ||
2716            $config_file ne "$git_dir/config") {
2717                %config = git_parse_project_config('gitweb');
2718                $config_file = "$git_dir/config";
2719        }
2720
2721        # check if config variable (key) exists
2722        return unless exists $config{"gitweb.$key"};
2723
2724        # ensure given type
2725        if (!defined $type) {
2726                return $config{"gitweb.$key"};
2727        } elsif ($type eq 'bool') {
2728                # backward compatibility: 'git config --bool' returns true/false
2729                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2730        } elsif ($type eq 'int') {
2731                return config_to_int($config{"gitweb.$key"});
2732        }
2733        return $config{"gitweb.$key"};
2734}
2735
2736# get hash of given path at given ref
2737sub git_get_hash_by_path {
2738        my $base = shift;
2739        my $path = shift || return undef;
2740        my $type = shift;
2741
2742        $path =~ s,/+$,,;
2743
2744        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2745                or die_error(500, "Open git-ls-tree failed");
2746        my $line = <$fd>;
2747        close $fd or return undef;
2748
2749        if (!defined $line) {
2750                # there is no tree or hash given by $path at $base
2751                return undef;
2752        }
2753
2754        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2755        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2756        if (defined $type && $type ne $2) {
2757                # type doesn't match
2758                return undef;
2759        }
2760        return $3;
2761}
2762
2763# get path of entry with given hash at given tree-ish (ref)
2764# used to get 'from' filename for combined diff (merge commit) for renames
2765sub git_get_path_by_hash {
2766        my $base = shift || return;
2767        my $hash = shift || return;
2768
2769        local $/ = "\0";
2770
2771        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2772                or return undef;
2773        while (my $line = <$fd>) {
2774                chomp $line;
2775
2776                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2777                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2778                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2779                        close $fd;
2780                        return $1;
2781                }
2782        }
2783        close $fd;
2784        return undef;
2785}
2786
2787## ......................................................................
2788## git utility functions, directly accessing git repository
2789
2790# get the value of config variable either from file named as the variable
2791# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2792# configuration variable in the repository config file.
2793sub git_get_file_or_project_config {
2794        my ($path, $name) = @_;
2795
2796        $git_dir = "$projectroot/$path";
2797        open my $fd, '<', "$git_dir/$name"
2798                or return git_get_project_config($name);
2799        my $conf = <$fd>;
2800        close $fd;
2801        if (defined $conf) {
2802                chomp $conf;
2803        }
2804        return $conf;
2805}
2806
2807sub git_get_project_description {
2808        my $path = shift;
2809        return git_get_file_or_project_config($path, 'description');
2810}
2811
2812sub git_get_project_category {
2813        my $path = shift;
2814        return git_get_file_or_project_config($path, 'category');
2815}
2816
2817
2818# supported formats:
2819# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2820#   - if its contents is a number, use it as tag weight,
2821#   - otherwise add a tag with weight 1
2822# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2823#   the same value multiple times increases tag weight
2824# * `gitweb.ctag' multi-valued repo config variable
2825sub git_get_project_ctags {
2826        my $project = shift;
2827        my $ctags = {};
2828
2829        $git_dir = "$projectroot/$project";
2830        if (opendir my $dh, "$git_dir/ctags") {
2831                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2832                foreach my $tagfile (@files) {
2833                        open my $ct, '<', $tagfile
2834                                or next;
2835                        my $val = <$ct>;
2836                        chomp $val if $val;
2837                        close $ct;
2838
2839                        (my $ctag = $tagfile) =~ s#.*/##;
2840                        if ($val =~ /^\d+$/) {
2841                                $ctags->{$ctag} = $val;
2842                        } else {
2843                                $ctags->{$ctag} = 1;
2844                        }
2845                }
2846                closedir $dh;
2847
2848        } elsif (open my $fh, '<', "$git_dir/ctags") {
2849                while (my $line = <$fh>) {
2850                        chomp $line;
2851                        $ctags->{$line}++ if $line;
2852                }
2853                close $fh;
2854
2855        } else {
2856                my $taglist = config_to_multi(git_get_project_config('ctag'));
2857                foreach my $tag (@$taglist) {
2858                        $ctags->{$tag}++;
2859                }
2860        }
2861
2862        return $ctags;
2863}
2864
2865# return hash, where keys are content tags ('ctags'),
2866# and values are sum of weights of given tag in every project
2867sub git_gather_all_ctags {
2868        my $projects = shift;
2869        my $ctags = {};
2870
2871        foreach my $p (@$projects) {
2872                foreach my $ct (keys %{$p->{'ctags'}}) {
2873                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2874                }
2875        }
2876
2877        return $ctags;
2878}
2879
2880sub git_populate_project_tagcloud {
2881        my $ctags = shift;
2882
2883        # First, merge different-cased tags; tags vote on casing
2884        my %ctags_lc;
2885        foreach (keys %$ctags) {
2886                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2887                if (not $ctags_lc{lc $_}->{topcount}
2888                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2889                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2890                        $ctags_lc{lc $_}->{topname} = $_;
2891                }
2892        }
2893
2894        my $cloud;
2895        my $matched = $input_params{'ctag'};
2896        if (eval { require HTML::TagCloud; 1; }) {
2897                $cloud = HTML::TagCloud->new;
2898                foreach my $ctag (sort keys %ctags_lc) {
2899                        # Pad the title with spaces so that the cloud looks
2900                        # less crammed.
2901                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2902                        $title =~ s/ /&nbsp;/g;
2903                        $title =~ s/^/&nbsp;/g;
2904                        $title =~ s/$/&nbsp;/g;
2905                        if (defined $matched && $matched eq $ctag) {
2906                                $title = qq(<span class="match">$title</span>);
2907                        }
2908                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2909                                    $ctags_lc{$ctag}->{count});
2910                }
2911        } else {
2912                $cloud = {};
2913                foreach my $ctag (keys %ctags_lc) {
2914                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2915                        if (defined $matched && $matched eq $ctag) {
2916                                $title = qq(<span class="match">$title</span>);
2917                        }
2918                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2919                        $cloud->{$ctag}{ctag} =
2920                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2921                }
2922        }
2923        return $cloud;
2924}
2925
2926sub git_show_project_tagcloud {
2927        my ($cloud, $count) = @_;
2928        if (ref $cloud eq 'HTML::TagCloud') {
2929                return $cloud->html_and_css($count);
2930        } else {
2931                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2932                return
2933                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2934                        join (', ', map {
2935                                $cloud->{$_}->{'ctag'}
2936                        } splice(@tags, 0, $count)) .
2937                        '</div>';
2938        }
2939}
2940
2941sub git_get_project_url_list {
2942        my $path = shift;
2943
2944        $git_dir = "$projectroot/$path";
2945        open my $fd, '<', "$git_dir/cloneurl"
2946                or return wantarray ?
2947                @{ config_to_multi(git_get_project_config('url')) } :
2948                   config_to_multi(git_get_project_config('url'));
2949        my @git_project_url_list = map { chomp; $_ } <$fd>;
2950        close $fd;
2951
2952        return wantarray ? @git_project_url_list : \@git_project_url_list;
2953}
2954
2955sub git_get_projects_list {
2956        my $filter = shift || '';
2957        my $paranoid = shift;
2958        my @list;
2959
2960        if (-d $projects_list) {
2961                # search in directory
2962                my $dir = $projects_list;
2963                # remove the trailing "/"
2964                $dir =~ s!/+$!!;
2965                my $pfxlen = length("$dir");
2966                my $pfxdepth = ($dir =~ tr!/!!);
2967                # when filtering, search only given subdirectory
2968                if ($filter && !$paranoid) {
2969                        $dir .= "/$filter";
2970                        $dir =~ s!/+$!!;
2971                }
2972
2973                File::Find::find({
2974                        follow_fast => 1, # follow symbolic links
2975                        follow_skip => 2, # ignore duplicates
2976                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2977                        wanted => sub {
2978                                # global variables
2979                                our $project_maxdepth;
2980                                our $projectroot;
2981                                # skip project-list toplevel, if we get it.
2982                                return if (m!^[/.]$!);
2983                                # only directories can be git repositories
2984                                return unless (-d $_);
2985                                # don't traverse too deep (Find is super slow on os x)
2986                                # $project_maxdepth excludes depth of $projectroot
2987                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2988                                        $File::Find::prune = 1;
2989                                        return;
2990                                }
2991
2992                                my $path = substr($File::Find::name, $pfxlen + 1);
2993                                # paranoidly only filter here
2994                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2995                                        next;
2996                                }
2997                                # we check related file in $projectroot
2998                                if (check_export_ok("$projectroot/$path")) {
2999                                        push @list, { path => $path };
3000                                        $File::Find::prune = 1;
3001                                }
3002                        },
3003                }, "$dir");
3004
3005        } elsif (-f $projects_list) {
3006                # read from file(url-encoded):
3007                # 'git%2Fgit.git Linus+Torvalds'
3008                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3009                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3010                open my $fd, '<', $projects_list or return;
3011        PROJECT:
3012                while (my $line = <$fd>) {
3013                        chomp $line;
3014                        my ($path, $owner) = split ' ', $line;
3015                        $path = unescape($path);
3016                        $owner = unescape($owner);
3017                        if (!defined $path) {
3018                                next;
3019                        }
3020                        # if $filter is rpovided, check if $path begins with $filter
3021                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3022                                next;
3023                        }
3024                        if (check_export_ok("$projectroot/$path")) {
3025                                my $pr = {
3026                                        path => $path
3027                                };
3028                                if ($owner) {
3029                                        $pr->{'owner'} = to_utf8($owner);
3030                                }
3031                                push @list, $pr;
3032                        }
3033                }
3034                close $fd;
3035        }
3036        return @list;
3037}
3038
3039# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3040# as side effects it sets 'forks' field to list of forks for forked projects
3041sub filter_forks_from_projects_list {
3042        my $projects = shift;
3043
3044        my %trie; # prefix tree of directories (path components)
3045        # generate trie out of those directories that might contain forks
3046        foreach my $pr (@$projects) {
3047                my $path = $pr->{'path'};
3048                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3049                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3050                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3051                next unless (-d "$projectroot/$path"); # containing directory exists
3052                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3053
3054                # add to trie
3055                my @dirs = split('/', $path);
3056                # walk the trie, until either runs out of components or out of trie
3057                my $ref = \%trie;
3058                while (scalar @dirs &&
3059                       exists($ref->{$dirs[0]})) {
3060                        $ref = $ref->{shift @dirs};
3061                }
3062                # create rest of trie structure from rest of components
3063                foreach my $dir (@dirs) {
3064                        $ref = $ref->{$dir} = {};
3065                }
3066                # create end marker, store $pr as a data
3067                $ref->{''} = $pr if (!exists $ref->{''});
3068        }
3069
3070        # filter out forks, by finding shortest prefix match for paths
3071        my @filtered;
3072 PROJECT:
3073        foreach my $pr (@$projects) {
3074                # trie lookup
3075                my $ref = \%trie;
3076        DIR:
3077                foreach my $dir (split('/', $pr->{'path'})) {
3078                        if (exists $ref->{''}) {
3079                                # found [shortest] prefix, is a fork - skip it
3080                                push @{$ref->{''}{'forks'}}, $pr;
3081                                next PROJECT;
3082                        }
3083                        if (!exists $ref->{$dir}) {
3084                                # not in trie, cannot have prefix, not a fork
3085                                push @filtered, $pr;
3086                                next PROJECT;
3087                        }
3088                        # If the dir is there, we just walk one step down the trie.
3089                        $ref = $ref->{$dir};
3090                }
3091                # we ran out of trie
3092                # (shouldn't happen: it's either no match, or end marker)
3093                push @filtered, $pr;
3094        }
3095
3096        return @filtered;
3097}
3098
3099# note: fill_project_list_info must be run first,
3100# for 'descr_long' and 'ctags' to be filled
3101sub search_projects_list {
3102        my ($projlist, %opts) = @_;
3103        my $tagfilter  = $opts{'tagfilter'};
3104        my $search_re = $opts{'search_regexp'};
3105
3106        return @$projlist
3107                unless ($tagfilter || $search_re);
3108
3109        # searching projects require filling to be run before it;
3110        fill_project_list_info($projlist,
3111                               $tagfilter  ? 'ctags' : (),
3112                               $search_re ? ('path', 'descr') : ());
3113        my @projects;
3114 PROJECT:
3115        foreach my $pr (@$projlist) {
3116
3117                if ($tagfilter) {
3118                        next unless ref($pr->{'ctags'}) eq 'HASH';
3119                        next unless
3120                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3121                }
3122
3123                if ($search_re) {
3124                        next unless
3125                                $pr->{'path'} =~ /$search_re/ ||
3126                                $pr->{'descr_long'} =~ /$search_re/;
3127                }
3128
3129                push @projects, $pr;
3130        }
3131
3132        return @projects;
3133}
3134
3135our $gitweb_project_owner = undef;
3136sub git_get_project_list_from_file {
3137
3138        return if (defined $gitweb_project_owner);
3139
3140        $gitweb_project_owner = {};
3141        # read from file (url-encoded):
3142        # 'git%2Fgit.git Linus+Torvalds'
3143        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3144        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3145        if (-f $projects_list) {
3146                open(my $fd, '<', $projects_list);
3147                while (my $line = <$fd>) {
3148                        chomp $line;
3149                        my ($pr, $ow) = split ' ', $line;
3150                        $pr = unescape($pr);
3151                        $ow = unescape($ow);
3152                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3153                }
3154                close $fd;
3155        }
3156}
3157
3158sub git_get_project_owner {
3159        my $project = shift;
3160        my $owner;
3161
3162        return undef unless $project;
3163        $git_dir = "$projectroot/$project";
3164
3165        if (!defined $gitweb_project_owner) {
3166                git_get_project_list_from_file();
3167        }
3168
3169        if (exists $gitweb_project_owner->{$project}) {
3170                $owner = $gitweb_project_owner->{$project};
3171        }
3172        if (!defined $owner){
3173                $owner = git_get_project_config('owner');
3174        }
3175        if (!defined $owner) {
3176                $owner = get_file_owner("$git_dir");
3177        }
3178
3179        return $owner;
3180}
3181
3182sub git_get_last_activity {
3183        my ($path) = @_;
3184        my $fd;
3185
3186        $git_dir = "$projectroot/$path";
3187        open($fd, "-|", git_cmd(), 'for-each-ref',
3188             '--format=%(committer)',
3189             '--sort=-committerdate',
3190             '--count=1',
3191             'refs/heads') or return;
3192        my $most_recent = <$fd>;
3193        close $fd or return;
3194        if (defined $most_recent &&
3195            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3196                my $timestamp = $1;
3197                my $age = time - $timestamp;
3198                return ($age, age_string($age));
3199        }
3200        return (undef, undef);
3201}
3202
3203# Implementation note: when a single remote is wanted, we cannot use 'git
3204# remote show -n' because that command always work (assuming it's a remote URL
3205# if it's not defined), and we cannot use 'git remote show' because that would
3206# try to make a network roundtrip. So the only way to find if that particular
3207# remote is defined is to walk the list provided by 'git remote -v' and stop if
3208# and when we find what we want.
3209sub git_get_remotes_list {
3210        my $wanted = shift;
3211        my %remotes = ();
3212
3213        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3214        return unless $fd;
3215        while (my $remote = <$fd>) {
3216                chomp $remote;
3217                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3218                next if $wanted and not $remote eq $wanted;
3219                my ($url, $key) = ($1, $2);
3220
3221                $remotes{$remote} ||= { 'heads' => () };
3222                $remotes{$remote}{$key} = $url;
3223        }
3224        close $fd or return;
3225        return wantarray ? %remotes : \%remotes;
3226}
3227
3228# Takes a hash of remotes as first parameter and fills it by adding the
3229# available remote heads for each of the indicated remotes.
3230sub fill_remote_heads {
3231        my $remotes = shift;
3232        my @heads = map { "remotes/$_" } keys %$remotes;
3233        my @remoteheads = git_get_heads_list(undef, @heads);
3234        foreach my $remote (keys %$remotes) {
3235                $remotes->{$remote}{'heads'} = [ grep {
3236                        $_->{'name'} =~ s!^$remote/!!
3237                        } @remoteheads ];
3238        }
3239}
3240
3241sub git_get_references {
3242        my $type = shift || "";
3243        my %refs;
3244        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3245        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3246        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3247                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3248                or return;
3249
3250        while (my $line = <$fd>) {
3251                chomp $line;
3252                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3253                        if (defined $refs{$1}) {
3254                                push @{$refs{$1}}, $2;
3255                        } else {
3256                                $refs{$1} = [ $2 ];
3257                        }
3258                }
3259        }
3260        close $fd or return;
3261        return \%refs;
3262}
3263
3264sub git_get_rev_name_tags {
3265        my $hash = shift || return undef;
3266
3267        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3268                or return;
3269        my $name_rev = <$fd>;
3270        close $fd;
3271
3272        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3273                return $1;
3274        } else {
3275                # catches also '$hash undefined' output
3276                return undef;
3277        }
3278}
3279
3280## ----------------------------------------------------------------------
3281## parse to hash functions
3282
3283sub parse_date {
3284        my $epoch = shift;
3285        my $tz = shift || "-0000";
3286
3287        my %date;
3288        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3289        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3290        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3291        $date{'hour'} = $hour;
3292        $date{'minute'} = $min;
3293        $date{'mday'} = $mday;
3294        $date{'day'} = $days[$wday];
3295        $date{'month'} = $months[$mon];
3296        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3297                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3298        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3299                             $mday, $months[$mon], $hour ,$min;
3300        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3301                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3302
3303        my ($tz_sign, $tz_hour, $tz_min) =
3304                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3305        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3306        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3307        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3308        $date{'hour_local'} = $hour;
3309        $date{'minute_local'} = $min;
3310        $date{'tz_local'} = $tz;
3311        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3312                                  1900+$year, $mon+1, $mday,
3313                                  $hour, $min, $sec, $tz);
3314        return %date;
3315}
3316
3317sub parse_tag {
3318        my $tag_id = shift;
3319        my %tag;
3320        my @comment;
3321
3322        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3323        $tag{'id'} = $tag_id;
3324        while (my $line = <$fd>) {
3325                chomp $line;
3326                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3327                        $tag{'object'} = $1;
3328                } elsif ($line =~ m/^type (.+)$/) {
3329                        $tag{'type'} = $1;
3330                } elsif ($line =~ m/^tag (.+)$/) {
3331                        $tag{'name'} = $1;
3332                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3333                        $tag{'author'} = $1;
3334                        $tag{'author_epoch'} = $2;
3335                        $tag{'author_tz'} = $3;
3336                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3337                                $tag{'author_name'}  = $1;
3338                                $tag{'author_email'} = $2;
3339                        } else {
3340                                $tag{'author_name'} = $tag{'author'};
3341                        }
3342                } elsif ($line =~ m/--BEGIN/) {
3343                        push @comment, $line;
3344                        last;
3345                } elsif ($line eq "") {
3346                        last;
3347                }
3348        }
3349        push @comment, <$fd>;
3350        $tag{'comment'} = \@comment;
3351        close $fd or return;
3352        if (!defined $tag{'name'}) {
3353                return
3354        };
3355        return %tag
3356}
3357
3358sub parse_commit_text {
3359        my ($commit_text, $withparents) = @_;
3360        my @commit_lines = split '\n', $commit_text;
3361        my %co;
3362
3363        pop @commit_lines; # Remove '\0'
3364
3365        if (! @commit_lines) {
3366                return;
3367        }
3368
3369        my $header = shift @commit_lines;
3370        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3371                return;
3372        }
3373        ($co{'id'}, my @parents) = split ' ', $header;
3374        while (my $line = shift @commit_lines) {
3375                last if $line eq "\n";
3376                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3377                        $co{'tree'} = $1;
3378                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3379                        push @parents, $1;
3380                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3381                        $co{'author'} = to_utf8($1);
3382                        $co{'author_epoch'} = $2;
3383                        $co{'author_tz'} = $3;
3384                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3385                                $co{'author_name'}  = $1;
3386                                $co{'author_email'} = $2;
3387                        } else {
3388                                $co{'author_name'} = $co{'author'};
3389                        }
3390                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3391                        $co{'committer'} = to_utf8($1);
3392                        $co{'committer_epoch'} = $2;
3393                        $co{'committer_tz'} = $3;
3394                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3395                                $co{'committer_name'}  = $1;
3396                                $co{'committer_email'} = $2;
3397                        } else {
3398                                $co{'committer_name'} = $co{'committer'};
3399                        }
3400                }
3401        }
3402        if (!defined $co{'tree'}) {
3403                return;
3404        };
3405        $co{'parents'} = \@parents;
3406        $co{'parent'} = $parents[0];
3407
3408        foreach my $title (@commit_lines) {
3409                $title =~ s/^    //;
3410                if ($title ne "") {
3411                        $co{'title'} = chop_str($title, 80, 5);
3412                        # remove leading stuff of merges to make the interesting part visible
3413                        if (length($title) > 50) {
3414                                $title =~ s/^Automatic //;
3415                                $title =~ s/^merge (of|with) /Merge ... /i;
3416                                if (length($title) > 50) {
3417                                        $title =~ s/(http|rsync):\/\///;
3418                                }
3419                                if (length($title) > 50) {
3420                                        $title =~ s/(master|www|rsync)\.//;
3421                                }
3422                                if (length($title) > 50) {
3423                                        $title =~ s/kernel.org:?//;
3424                                }
3425                                if (length($title) > 50) {
3426                                        $title =~ s/\/pub\/scm//;
3427                                }
3428                        }
3429                        $co{'title_short'} = chop_str($title, 50, 5);
3430                        last;
3431                }
3432        }
3433        if (! defined $co{'title'} || $co{'title'} eq "") {
3434                $co{'title'} = $co{'title_short'} = '(no commit message)';
3435        }
3436        # remove added spaces
3437        foreach my $line (@commit_lines) {
3438                $line =~ s/^    //;
3439        }
3440        $co{'comment'} = \@commit_lines;
3441
3442        my $age = time - $co{'committer_epoch'};
3443        $co{'age'} = $age;
3444        $co{'age_string'} = age_string($age);
3445        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3446        if ($age > 60*60*24*7*2) {
3447                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3448                $co{'age_string_age'} = $co{'age_string'};
3449        } else {
3450                $co{'age_string_date'} = $co{'age_string'};
3451                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3452        }
3453        return %co;
3454}
3455
3456sub parse_commit {
3457        my ($commit_id) = @_;
3458        my %co;
3459
3460        local $/ = "\0";
3461
3462        open my $fd, "-|", git_cmd(), "rev-list",
3463                "--parents",
3464                "--header",
3465                "--max-count=1",
3466                $commit_id,
3467                "--",
3468                or die_error(500, "Open git-rev-list failed");
3469        %co = parse_commit_text(<$fd>, 1);
3470        close $fd;
3471
3472        return %co;
3473}
3474
3475sub parse_commits {
3476        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3477        my @cos;
3478
3479        $maxcount ||= 1;
3480        $skip ||= 0;
3481
3482        local $/ = "\0";
3483
3484        open my $fd, "-|", git_cmd(), "rev-list",
3485                "--header",
3486                @args,
3487                ("--max-count=" . $maxcount),
3488                ("--skip=" . $skip),
3489                @extra_options,
3490                $commit_id,
3491                "--",
3492                ($filename ? ($filename) : ())
3493                or die_error(500, "Open git-rev-list failed");
3494        while (my $line = <$fd>) {
3495                my %co = parse_commit_text($line);
3496                push @cos, \%co;
3497        }
3498        close $fd;
3499
3500        return wantarray ? @cos : \@cos;
3501}
3502
3503# parse line of git-diff-tree "raw" output
3504sub parse_difftree_raw_line {
3505        my $line = shift;
3506        my %res;
3507
3508        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3509        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3510        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3511                $res{'from_mode'} = $1;
3512                $res{'to_mode'} = $2;
3513                $res{'from_id'} = $3;
3514                $res{'to_id'} = $4;
3515                $res{'status'} = $5;
3516                $res{'similarity'} = $6;
3517                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3518                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3519                } else {
3520                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3521                }
3522        }
3523        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3524        # combined diff (for merge commit)
3525        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3526                $res{'nparents'}  = length($1);
3527                $res{'from_mode'} = [ split(' ', $2) ];
3528                $res{'to_mode'} = pop @{$res{'from_mode'}};
3529                $res{'from_id'} = [ split(' ', $3) ];
3530                $res{'to_id'} = pop @{$res{'from_id'}};
3531                $res{'status'} = [ split('', $4) ];
3532                $res{'to_file'} = unquote($5);
3533        }
3534        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3535        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3536                $res{'commit'} = $1;
3537        }
3538
3539        return wantarray ? %res : \%res;
3540}
3541
3542# wrapper: return parsed line of git-diff-tree "raw" output
3543# (the argument might be raw line, or parsed info)
3544sub parsed_difftree_line {
3545        my $line_or_ref = shift;
3546
3547        if (ref($line_or_ref) eq "HASH") {
3548                # pre-parsed (or generated by hand)
3549                return $line_or_ref;
3550        } else {
3551                return parse_difftree_raw_line($line_or_ref);
3552        }
3553}
3554
3555# parse line of git-ls-tree output
3556sub parse_ls_tree_line {
3557        my $line = shift;
3558        my %opts = @_;
3559        my %res;
3560
3561        if ($opts{'-l'}) {
3562                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3563                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3564
3565                $res{'mode'} = $1;
3566                $res{'type'} = $2;
3567                $res{'hash'} = $3;
3568                $res{'size'} = $4;
3569                if ($opts{'-z'}) {
3570                        $res{'name'} = $5;
3571                } else {
3572                        $res{'name'} = unquote($5);
3573                }
3574        } else {
3575                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3576                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3577
3578                $res{'mode'} = $1;
3579                $res{'type'} = $2;
3580                $res{'hash'} = $3;
3581                if ($opts{'-z'}) {
3582                        $res{'name'} = $4;
3583                } else {
3584                        $res{'name'} = unquote($4);
3585                }
3586        }
3587
3588        return wantarray ? %res : \%res;
3589}
3590
3591# generates _two_ hashes, references to which are passed as 2 and 3 argument
3592sub parse_from_to_diffinfo {
3593        my ($diffinfo, $from, $to, @parents) = @_;
3594
3595        if ($diffinfo->{'nparents'}) {
3596                # combined diff
3597                $from->{'file'} = [];
3598                $from->{'href'} = [];
3599                fill_from_file_info($diffinfo, @parents)
3600                        unless exists $diffinfo->{'from_file'};
3601                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3602                        $from->{'file'}[$i] =
3603                                defined $diffinfo->{'from_file'}[$i] ?
3604                                        $diffinfo->{'from_file'}[$i] :
3605                                        $diffinfo->{'to_file'};
3606                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3607                                $from->{'href'}[$i] = href(action=>"blob",
3608                                                           hash_base=>$parents[$i],
3609                                                           hash=>$diffinfo->{'from_id'}[$i],
3610                                                           file_name=>$from->{'file'}[$i]);
3611                        } else {
3612                                $from->{'href'}[$i] = undef;
3613                        }
3614                }
3615        } else {
3616                # ordinary (not combined) diff
3617                $from->{'file'} = $diffinfo->{'from_file'};
3618                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3619                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3620                                               hash=>$diffinfo->{'from_id'},
3621                                               file_name=>$from->{'file'});
3622                } else {
3623                        delete $from->{'href'};
3624                }
3625        }
3626
3627        $to->{'file'} = $diffinfo->{'to_file'};
3628        if (!is_deleted($diffinfo)) { # file exists in result
3629                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3630                                     hash=>$diffinfo->{'to_id'},
3631                                     file_name=>$to->{'file'});
3632        } else {
3633                delete $to->{'href'};
3634        }
3635}
3636
3637## ......................................................................
3638## parse to array of hashes functions
3639
3640sub git_get_heads_list {
3641        my ($limit, @classes) = @_;
3642        @classes = ('heads') unless @classes;
3643        my @patterns = map { "refs/$_" } @classes;
3644        my @headslist;
3645
3646        open my $fd, '-|', git_cmd(), 'for-each-ref',
3647                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3648                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3649                @patterns
3650                or return;
3651        while (my $line = <$fd>) {
3652                my %ref_item;
3653
3654                chomp $line;
3655                my ($refinfo, $committerinfo) = split(/\0/, $line);
3656                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3657                my ($committer, $epoch, $tz) =
3658                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3659                $ref_item{'fullname'}  = $name;
3660                $name =~ s!^refs/(?:head|remote)s/!!;
3661
3662                $ref_item{'name'}  = $name;
3663                $ref_item{'id'}    = $hash;
3664                $ref_item{'title'} = $title || '(no commit message)';
3665                $ref_item{'epoch'} = $epoch;
3666                if ($epoch) {
3667                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3668                } else {
3669                        $ref_item{'age'} = "unknown";
3670                }
3671
3672                push @headslist, \%ref_item;
3673        }
3674        close $fd;
3675
3676        return wantarray ? @headslist : \@headslist;
3677}
3678
3679sub git_get_tags_list {
3680        my $limit = shift;
3681        my @tagslist;
3682
3683        open my $fd, '-|', git_cmd(), 'for-each-ref',
3684                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3685                '--format=%(objectname) %(objecttype) %(refname) '.
3686                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3687                'refs/tags'
3688                or return;
3689        while (my $line = <$fd>) {
3690                my %ref_item;
3691
3692                chomp $line;
3693                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3694                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3695                my ($creator, $epoch, $tz) =
3696                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3697                $ref_item{'fullname'} = $name;
3698                $name =~ s!^refs/tags/!!;
3699
3700                $ref_item{'type'} = $type;
3701                $ref_item{'id'} = $id;
3702                $ref_item{'name'} = $name;
3703                if ($type eq "tag") {
3704                        $ref_item{'subject'} = $title;
3705                        $ref_item{'reftype'} = $reftype;
3706                        $ref_item{'refid'}   = $refid;
3707                } else {
3708                        $ref_item{'reftype'} = $type;
3709                        $ref_item{'refid'}   = $id;
3710                }
3711
3712                if ($type eq "tag" || $type eq "commit") {
3713                        $ref_item{'epoch'} = $epoch;
3714                        if ($epoch) {
3715                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3716                        } else {
3717                                $ref_item{'age'} = "unknown";
3718                        }
3719                }
3720
3721                push @tagslist, \%ref_item;
3722        }
3723        close $fd;
3724
3725        return wantarray ? @tagslist : \@tagslist;
3726}
3727
3728## ----------------------------------------------------------------------
3729## filesystem-related functions
3730
3731sub get_file_owner {
3732        my $path = shift;
3733
3734        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3735        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3736        if (!defined $gcos) {
3737                return undef;
3738        }
3739        my $owner = $gcos;
3740        $owner =~ s/[,;].*$//;
3741        return to_utf8($owner);
3742}
3743
3744# assume that file exists
3745sub insert_file {
3746        my $filename = shift;
3747
3748        open my $fd, '<', $filename;
3749        print map { to_utf8($_) } <$fd>;
3750        close $fd;
3751}
3752
3753## ......................................................................
3754## mimetype related functions
3755
3756sub mimetype_guess_file {
3757        my $filename = shift;
3758        my $mimemap = shift;
3759        -r $mimemap or return undef;
3760
3761        my %mimemap;
3762        open(my $mh, '<', $mimemap) or return undef;
3763        while (<$mh>) {
3764                next if m/^#/; # skip comments
3765                my ($mimetype, @exts) = split(/\s+/);
3766                foreach my $ext (@exts) {
3767                        $mimemap{$ext} = $mimetype;
3768                }
3769        }
3770        close($mh);
3771
3772        $filename =~ /\.([^.]*)$/;
3773        return $mimemap{$1};
3774}
3775
3776sub mimetype_guess {
3777        my $filename = shift;
3778        my $mime;
3779        $filename =~ /\./ or return undef;
3780
3781        if ($mimetypes_file) {
3782                my $file = $mimetypes_file;
3783                if ($file !~ m!^/!) { # if it is relative path
3784                        # it is relative to project
3785                        $file = "$projectroot/$project/$file";
3786                }
3787                $mime = mimetype_guess_file($filename, $file);
3788        }
3789        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3790        return $mime;
3791}
3792
3793sub blob_mimetype {
3794        my $fd = shift;
3795        my $filename = shift;
3796
3797        if ($filename) {
3798                my $mime = mimetype_guess($filename);
3799                $mime and return $mime;
3800        }
3801
3802        # just in case
3803        return $default_blob_plain_mimetype unless $fd;
3804
3805        if (-T $fd) {
3806                return 'text/plain';
3807        } elsif (! $filename) {
3808                return 'application/octet-stream';
3809        } elsif ($filename =~ m/\.png$/i) {
3810                return 'image/png';
3811        } elsif ($filename =~ m/\.gif$/i) {
3812                return 'image/gif';
3813        } elsif ($filename =~ m/\.jpe?g$/i) {
3814                return 'image/jpeg';
3815        } else {
3816                return 'application/octet-stream';
3817        }
3818}
3819
3820sub blob_contenttype {
3821        my ($fd, $file_name, $type) = @_;
3822
3823        $type ||= blob_mimetype($fd, $file_name);
3824        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3825                $type .= "; charset=$default_text_plain_charset";
3826        }
3827
3828        return $type;
3829}
3830
3831# guess file syntax for syntax highlighting; return undef if no highlighting
3832# the name of syntax can (in the future) depend on syntax highlighter used
3833sub guess_file_syntax {
3834        my ($highlight, $mimetype, $file_name) = @_;
3835        return undef unless ($highlight && defined $file_name);
3836        my $basename = basename($file_name, '.in');
3837        return $highlight_basename{$basename}
3838                if exists $highlight_basename{$basename};
3839
3840        $basename =~ /\.([^.]*)$/;
3841        my $ext = $1 or return undef;
3842        return $highlight_ext{$ext}
3843                if exists $highlight_ext{$ext};
3844
3845        return undef;
3846}
3847
3848# run highlighter and return FD of its output,
3849# or return original FD if no highlighting
3850sub run_highlighter {
3851        my ($fd, $highlight, $syntax) = @_;
3852        return $fd unless ($highlight && defined $syntax);
3853
3854        close $fd;
3855        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3856                  quote_command($highlight_bin).
3857                  " --replace-tabs=8 --fragment --syntax $syntax |"
3858                or die_error(500, "Couldn't open file or run syntax highlighter");
3859        return $fd;
3860}
3861
3862## ======================================================================
3863## functions printing HTML: header, footer, error page
3864
3865sub get_page_title {
3866        my $title = to_utf8($site_name);
3867
3868        unless (defined $project) {
3869                if (defined $project_filter) {
3870                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3871                }
3872                return $title;
3873        }
3874        $title .= " - " . to_utf8($project);
3875
3876        return $title unless (defined $action);
3877        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3878
3879        return $title unless (defined $file_name);
3880        $title .= " - " . esc_path($file_name);
3881        if ($action eq "tree" && $file_name !~ m|/$|) {
3882                $title .= "/";
3883        }
3884
3885        return $title;
3886}
3887
3888sub get_content_type_html {
3889        # require explicit support from the UA if we are to send the page as
3890        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3891        # we have to do this because MSIE sometimes globs '*/*', pretending to
3892        # support xhtml+xml but choking when it gets what it asked for.
3893        if (defined $cgi->http('HTTP_ACCEPT') &&
3894            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3895            $cgi->Accept('application/xhtml+xml') != 0) {
3896                return 'application/xhtml+xml';
3897        } else {
3898                return 'text/html';
3899        }
3900}
3901
3902sub print_feed_meta {
3903        if (defined $project) {
3904                my %href_params = get_feed_info();
3905                if (!exists $href_params{'-title'}) {
3906                        $href_params{'-title'} = 'log';
3907                }
3908
3909                foreach my $format (qw(RSS Atom)) {
3910                        my $type = lc($format);
3911                        my %link_attr = (
3912                                '-rel' => 'alternate',
3913                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3914                                '-type' => "application/$type+xml"
3915                        );
3916
3917                        $href_params{'extra_options'} = undef;
3918                        $href_params{'action'} = $type;
3919                        $link_attr{'-href'} = href(%href_params);
3920                        print "<link ".
3921                              "rel=\"$link_attr{'-rel'}\" ".
3922                              "title=\"$link_attr{'-title'}\" ".
3923                              "href=\"$link_attr{'-href'}\" ".
3924                              "type=\"$link_attr{'-type'}\" ".
3925                              "/>\n";
3926
3927                        $href_params{'extra_options'} = '--no-merges';
3928                        $link_attr{'-href'} = href(%href_params);
3929                        $link_attr{'-title'} .= ' (no merges)';
3930                        print "<link ".
3931                              "rel=\"$link_attr{'-rel'}\" ".
3932                              "title=\"$link_attr{'-title'}\" ".
3933                              "href=\"$link_attr{'-href'}\" ".
3934                              "type=\"$link_attr{'-type'}\" ".
3935                              "/>\n";
3936                }
3937
3938        } else {
3939                printf('<link rel="alternate" title="%s projects list" '.
3940                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3941                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3942                printf('<link rel="alternate" title="%s projects feeds" '.
3943                       'href="%s" type="text/x-opml" />'."\n",
3944                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3945        }
3946}
3947
3948sub print_header_links {
3949        my $status = shift;
3950
3951        # print out each stylesheet that exist, providing backwards capability
3952        # for those people who defined $stylesheet in a config file
3953        if (defined $stylesheet) {
3954                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3955        } else {
3956                foreach my $stylesheet (@stylesheets) {
3957                        next unless $stylesheet;
3958                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3959                }
3960        }
3961        print_feed_meta()
3962                if ($status eq '200 OK');
3963        if (defined $favicon) {
3964                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3965        }
3966}
3967
3968sub print_nav_breadcrumbs_path {
3969        my $dirprefix = undef;
3970        while (my $part = shift) {
3971                $dirprefix .= "/" if defined $dirprefix;
3972                $dirprefix .= $part;
3973                print $cgi->a({-href => href(project => undef,
3974                                             project_filter => $dirprefix,
3975                                             action => "project_list")},
3976                              esc_html($part)) . " / ";
3977        }
3978}
3979
3980sub print_nav_breadcrumbs {
3981        my %opts = @_;
3982
3983        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3984        if (defined $project) {
3985                my @dirname = split '/', $project;
3986                my $projectbasename = pop @dirname;
3987                print_nav_breadcrumbs_path(@dirname);
3988                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3989                if (defined $action) {
3990                        my $action_print = $action ;
3991                        if (defined $opts{-action_extra}) {
3992                                $action_print = $cgi->a({-href => href(action=>$action)},
3993                                        $action);
3994                        }
3995                        print " / $action_print";
3996                }
3997                if (defined $opts{-action_extra}) {
3998                        print " / $opts{-action_extra}";
3999                }
4000                print "\n";
4001        } elsif (defined $project_filter) {
4002                print_nav_breadcrumbs_path(split '/', $project_filter);
4003        }
4004}
4005
4006sub print_search_form {
4007        if (!defined $searchtext) {
4008                $searchtext = "";
4009        }
4010        my $search_hash;
4011        if (defined $hash_base) {
4012                $search_hash = $hash_base;
4013        } elsif (defined $hash) {
4014                $search_hash = $hash;
4015        } else {
4016                $search_hash = "HEAD";
4017        }
4018        my $action = $my_uri;
4019        my $use_pathinfo = gitweb_check_feature('pathinfo');
4020        if ($use_pathinfo) {
4021                $action .= "/".esc_url($project);
4022        }
4023        print $cgi->startform(-method => "get", -action => $action) .
4024              "<div class=\"search\">\n" .
4025              (!$use_pathinfo &&
4026              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4027              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4028              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4029              $cgi->popup_menu(-name => 'st', -default => 'commit',
4030                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4031              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4032              " search:\n",
4033              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4034              "<span title=\"Extended regular expression\">" .
4035              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4036                             -checked => $search_use_regexp) .
4037              "</span>" .
4038              "</div>" .
4039              $cgi->end_form() . "\n";
4040}
4041
4042sub git_header_html {
4043        my $status = shift || "200 OK";
4044        my $expires = shift;
4045        my %opts = @_;
4046
4047        my $title = get_page_title();
4048        my $content_type = get_content_type_html();
4049        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4050                           -status=> $status, -expires => $expires)
4051                unless ($opts{'-no_http_header'});
4052        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4053        print <<EOF;
4054<?xml version="1.0" encoding="utf-8"?>
4055<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4056<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4057<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4058<!-- git core binaries version $git_version -->
4059<head>
4060<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4061<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4062<meta name="robots" content="index, nofollow"/>
4063<title>$title</title>
4064EOF
4065        # the stylesheet, favicon etc urls won't work correctly with path_info
4066        # unless we set the appropriate base URL
4067        if ($ENV{'PATH_INFO'}) {
4068                print "<base href=\"".esc_url($base_url)."\" />\n";
4069        }
4070        print_header_links($status);
4071
4072        if (defined $site_html_head_string) {
4073                print to_utf8($site_html_head_string);
4074        }
4075
4076        print "</head>\n" .
4077              "<body>\n";
4078
4079        if (defined $site_header && -f $site_header) {
4080                insert_file($site_header);
4081        }
4082
4083        print "<div class=\"page_header\">\n";
4084        if (defined $logo) {
4085                print $cgi->a({-href => esc_url($logo_url),
4086                               -title => $logo_label},
4087                              $cgi->img({-src => esc_url($logo),
4088                                         -width => 72, -height => 27,
4089                                         -alt => "git",
4090                                         -class => "logo"}));
4091        }
4092        print_nav_breadcrumbs(%opts);
4093        print "</div>\n";
4094
4095        my $have_search = gitweb_check_feature('search');
4096        if (defined $project && $have_search) {
4097                print_search_form();
4098        }
4099}
4100
4101sub git_footer_html {
4102        my $feed_class = 'rss_logo';
4103
4104        print "<div class=\"page_footer\">\n";
4105        if (defined $project) {
4106                my $descr = git_get_project_description($project);
4107                if (defined $descr) {
4108                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4109                }
4110
4111                my %href_params = get_feed_info();
4112                if (!%href_params) {
4113                        $feed_class .= ' generic';
4114                }
4115                $href_params{'-title'} ||= 'log';
4116
4117                foreach my $format (qw(RSS Atom)) {
4118                        $href_params{'action'} = lc($format);
4119                        print $cgi->a({-href => href(%href_params),
4120                                      -title => "$href_params{'-title'} $format feed",
4121                                      -class => $feed_class}, $format)."\n";
4122                }
4123
4124        } else {
4125                print $cgi->a({-href => href(project=>undef, action=>"opml",
4126                                             project_filter => $project_filter),
4127                              -class => $feed_class}, "OPML") . " ";
4128                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4129                                             project_filter => $project_filter),
4130                              -class => $feed_class}, "TXT") . "\n";
4131        }
4132        print "</div>\n"; # class="page_footer"
4133
4134        if (defined $t0 && gitweb_check_feature('timed')) {
4135                print "<div id=\"generating_info\">\n";
4136                print 'This page took '.
4137                      '<span id="generating_time" class="time_span">'.
4138                      tv_interval($t0, [ gettimeofday() ]).
4139                      ' seconds </span>'.
4140                      ' and '.
4141                      '<span id="generating_cmd">'.
4142                      $number_of_git_cmds.
4143                      '</span> git commands '.
4144                      " to generate.\n";
4145                print "</div>\n"; # class="page_footer"
4146        }
4147
4148        if (defined $site_footer && -f $site_footer) {
4149                insert_file($site_footer);
4150        }
4151
4152        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4153        if (defined $action &&
4154            $action eq 'blame_incremental') {
4155                print qq!<script type="text/javascript">\n!.
4156                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4157                      qq!           "!. href() .qq!");\n!.
4158                      qq!</script>\n!;
4159        } else {
4160                my ($jstimezone, $tz_cookie, $datetime_class) =
4161                        gitweb_get_feature('javascript-timezone');
4162
4163                print qq!<script type="text/javascript">\n!.
4164                      qq!window.onload = function () {\n!;
4165                if (gitweb_check_feature('javascript-actions')) {
4166                        print qq!       fixLinks();\n!;
4167                }
4168                if ($jstimezone && $tz_cookie && $datetime_class) {
4169                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4170                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4171                }
4172                print qq!};\n!.
4173                      qq!</script>\n!;
4174        }
4175
4176        print "</body>\n" .
4177              "</html>";
4178}
4179
4180# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4181# Example: die_error(404, 'Hash not found')
4182# By convention, use the following status codes (as defined in RFC 2616):
4183# 400: Invalid or missing CGI parameters, or
4184#      requested object exists but has wrong type.
4185# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4186#      this server or project.
4187# 404: Requested object/revision/project doesn't exist.
4188# 500: The server isn't configured properly, or
4189#      an internal error occurred (e.g. failed assertions caused by bugs), or
4190#      an unknown error occurred (e.g. the git binary died unexpectedly).
4191# 503: The server is currently unavailable (because it is overloaded,
4192#      or down for maintenance).  Generally, this is a temporary state.
4193sub die_error {
4194        my $status = shift || 500;
4195        my $error = esc_html(shift) || "Internal Server Error";
4196        my $extra = shift;
4197        my %opts = @_;
4198
4199        my %http_responses = (
4200                400 => '400 Bad Request',
4201                403 => '403 Forbidden',
4202                404 => '404 Not Found',
4203                500 => '500 Internal Server Error',
4204                503 => '503 Service Unavailable',
4205        );
4206        git_header_html($http_responses{$status}, undef, %opts);
4207        print <<EOF;
4208<div class="page_body">
4209<br /><br />
4210$status - $error
4211<br />
4212EOF
4213        if (defined $extra) {
4214                print "<hr />\n" .
4215                      "$extra\n";
4216        }
4217        print "</div>\n";
4218
4219        git_footer_html();
4220        goto DONE_GITWEB
4221                unless ($opts{'-error_handler'});
4222}
4223
4224## ----------------------------------------------------------------------
4225## functions printing or outputting HTML: navigation
4226
4227sub git_print_page_nav {
4228        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4229        $extra = '' if !defined $extra; # pager or formats
4230
4231        my @navs = qw(summary shortlog log commit commitdiff tree);
4232        if ($suppress) {
4233                @navs = grep { $_ ne $suppress } @navs;
4234        }
4235
4236        my %arg = map { $_ => {action=>$_} } @navs;
4237        if (defined $head) {
4238                for (qw(commit commitdiff)) {
4239                        $arg{$_}{'hash'} = $head;
4240                }
4241                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4242                        for (qw(shortlog log)) {
4243                                $arg{$_}{'hash'} = $head;
4244                        }
4245                }
4246        }
4247
4248        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4249        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4250
4251        my @actions = gitweb_get_feature('actions');
4252        my %repl = (
4253                '%' => '%',
4254                'n' => $project,         # project name
4255                'f' => $git_dir,         # project path within filesystem
4256                'h' => $treehead || '',  # current hash ('h' parameter)
4257                'b' => $treebase || '',  # hash base ('hb' parameter)
4258        );
4259        while (@actions) {
4260                my ($label, $link, $pos) = splice(@actions,0,3);
4261                # insert
4262                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4263                # munch munch
4264                $link =~ s/%([%nfhb])/$repl{$1}/g;
4265                $arg{$label}{'_href'} = $link;
4266        }
4267
4268        print "<div class=\"page_nav\">\n" .
4269                (join " | ",
4270                 map { $_ eq $current ?
4271                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4272                 } @navs);
4273        print "<br/>\n$extra<br/>\n" .
4274              "</div>\n";
4275}
4276
4277# returns a submenu for the nagivation of the refs views (tags, heads,
4278# remotes) with the current view disabled and the remotes view only
4279# available if the feature is enabled
4280sub format_ref_views {
4281        my ($current) = @_;
4282        my @ref_views = qw{tags heads};
4283        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4284        return join " | ", map {
4285                $_ eq $current ? $_ :
4286                $cgi->a({-href => href(action=>$_)}, $_)
4287        } @ref_views
4288}
4289
4290sub format_paging_nav {
4291        my ($action, $page, $has_next_link) = @_;
4292        my $paging_nav;
4293
4294
4295        if ($page > 0) {
4296                $paging_nav .=
4297                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4298                        " &sdot; " .
4299                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4300                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4301        } else {
4302                $paging_nav .= "first &sdot; prev";
4303        }
4304
4305        if ($has_next_link) {
4306                $paging_nav .= " &sdot; " .
4307                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4308                                 -accesskey => "n", -title => "Alt-n"}, "next");
4309        } else {
4310                $paging_nav .= " &sdot; next";
4311        }
4312
4313        return $paging_nav;
4314}
4315
4316## ......................................................................
4317## functions printing or outputting HTML: div
4318
4319sub git_print_header_div {
4320        my ($action, $title, $hash, $hash_base) = @_;
4321        my %args = ();
4322
4323        $args{'action'} = $action;
4324        $args{'hash'} = $hash if $hash;
4325        $args{'hash_base'} = $hash_base if $hash_base;
4326
4327        print "<div class=\"header\">\n" .
4328              $cgi->a({-href => href(%args), -class => "title"},
4329              $title ? $title : $action) .
4330              "\n</div>\n";
4331}
4332
4333sub format_repo_url {
4334        my ($name, $url) = @_;
4335        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4336}
4337
4338# Group output by placing it in a DIV element and adding a header.
4339# Options for start_div() can be provided by passing a hash reference as the
4340# first parameter to the function.
4341# Options to git_print_header_div() can be provided by passing an array
4342# reference. This must follow the options to start_div if they are present.
4343# The content can be a scalar, which is output as-is, a scalar reference, which
4344# is output after html escaping, an IO handle passed either as *handle or
4345# *handle{IO}, or a function reference. In the latter case all following
4346# parameters will be taken as argument to the content function call.
4347sub git_print_section {
4348        my ($div_args, $header_args, $content);
4349        my $arg = shift;
4350        if (ref($arg) eq 'HASH') {
4351                $div_args = $arg;
4352                $arg = shift;
4353        }
4354        if (ref($arg) eq 'ARRAY') {
4355                $header_args = $arg;
4356                $arg = shift;
4357        }
4358        $content = $arg;
4359
4360        print $cgi->start_div($div_args);
4361        git_print_header_div(@$header_args);
4362
4363        if (ref($content) eq 'CODE') {
4364                $content->(@_);
4365        } elsif (ref($content) eq 'SCALAR') {
4366                print esc_html($$content);
4367        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4368                print <$content>;
4369        } elsif (!ref($content) && defined($content)) {
4370                print $content;
4371        }
4372
4373        print $cgi->end_div;
4374}
4375
4376sub format_timestamp_html {
4377        my $date = shift;
4378        my $strtime = $date->{'rfc2822'};
4379
4380        my (undef, undef, $datetime_class) =
4381                gitweb_get_feature('javascript-timezone');
4382        if ($datetime_class) {
4383                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4384        }
4385
4386        my $localtime_format = '(%02d:%02d %s)';
4387        if ($date->{'hour_local'} < 6) {
4388                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4389        }
4390        $strtime .= ' ' .
4391                    sprintf($localtime_format,
4392                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4393
4394        return $strtime;
4395}
4396
4397# Outputs the author name and date in long form
4398sub git_print_authorship {
4399        my $co = shift;
4400        my %opts = @_;
4401        my $tag = $opts{-tag} || 'div';
4402        my $author = $co->{'author_name'};
4403
4404        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4405        print "<$tag class=\"author_date\">" .
4406              format_search_author($author, "author", esc_html($author)) .
4407              " [".format_timestamp_html(\%ad)."]".
4408              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4409              "</$tag>\n";
4410}
4411
4412# Outputs table rows containing the full author or committer information,
4413# in the format expected for 'commit' view (& similar).
4414# Parameters are a commit hash reference, followed by the list of people
4415# to output information for. If the list is empty it defaults to both
4416# author and committer.
4417sub git_print_authorship_rows {
4418        my $co = shift;
4419        # too bad we can't use @people = @_ || ('author', 'committer')
4420        my @people = @_;
4421        @people = ('author', 'committer') unless @people;
4422        foreach my $who (@people) {
4423                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4424                print "<tr><td>$who</td><td>" .
4425                      format_search_author($co->{"${who}_name"}, $who,
4426                                           esc_html($co->{"${who}_name"})) . " " .
4427                      format_search_author($co->{"${who}_email"}, $who,
4428                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4429                      "</td><td rowspan=\"2\">" .
4430                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4431                      "</td></tr>\n" .
4432                      "<tr>" .
4433                      "<td></td><td>" .
4434                      format_timestamp_html(\%wd) .
4435                      "</td>" .
4436                      "</tr>\n";
4437        }
4438}
4439
4440sub git_print_page_path {
4441        my $name = shift;
4442        my $type = shift;
4443        my $hb = shift;
4444
4445
4446        print "<div class=\"page_path\">";
4447        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4448                      -title => 'tree root'}, to_utf8("[$project]"));
4449        print " / ";
4450        if (defined $name) {
4451                my @dirname = split '/', $name;
4452                my $basename = pop @dirname;
4453                my $fullname = '';
4454
4455                foreach my $dir (@dirname) {
4456                        $fullname .= ($fullname ? '/' : '') . $dir;
4457                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4458                                                     hash_base=>$hb),
4459                                      -title => $fullname}, esc_path($dir));
4460                        print " / ";
4461                }
4462                if (defined $type && $type eq 'blob') {
4463                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4464                                                     hash_base=>$hb),
4465                                      -title => $name}, esc_path($basename));
4466                } elsif (defined $type && $type eq 'tree') {
4467                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4468                                                     hash_base=>$hb),
4469                                      -title => $name}, esc_path($basename));
4470                        print " / ";
4471                } else {
4472                        print esc_path($basename);
4473                }
4474        }
4475        print "<br/></div>\n";
4476}
4477
4478sub git_print_log {
4479        my $log = shift;
4480        my %opts = @_;
4481
4482        if ($opts{'-remove_title'}) {
4483                # remove title, i.e. first line of log
4484                shift @$log;
4485        }
4486        # remove leading empty lines
4487        while (defined $log->[0] && $log->[0] eq "") {
4488                shift @$log;
4489        }
4490
4491        # print log
4492        my $skip_blank_line = 0;
4493        foreach my $line (@$log) {
4494                if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4495                        if (! $opts{'-remove_signoff'}) {
4496                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4497                                $skip_blank_line = 1;
4498                        }
4499                        next;
4500                }
4501
4502                if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4503                        if (! $opts{'-remove_signoff'}) {
4504                                print "<span class=\"signoff\">" . esc_html($1) . ": " .
4505                                        "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4506                                        "</span><br/>\n";
4507                                $skip_blank_line = 1;
4508                        }
4509                        next;
4510                }
4511
4512                # print only one empty line
4513                # do not print empty line after signoff
4514                if ($line eq "") {
4515                        next if ($skip_blank_line);
4516                        $skip_blank_line = 1;
4517                } else {
4518                        $skip_blank_line = 0;
4519                }
4520
4521                print format_log_line_html($line) . "<br/>\n";
4522        }
4523
4524        if ($opts{'-final_empty_line'}) {
4525                # end with single empty line
4526                print "<br/>\n" unless $skip_blank_line;
4527        }
4528}
4529
4530# return link target (what link points to)
4531sub git_get_link_target {
4532        my $hash = shift;
4533        my $link_target;
4534
4535        # read link
4536        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4537                or return;
4538        {
4539                local $/ = undef;
4540                $link_target = <$fd>;
4541        }
4542        close $fd
4543                or return;
4544
4545        return $link_target;
4546}
4547
4548# given link target, and the directory (basedir) the link is in,
4549# return target of link relative to top directory (top tree);
4550# return undef if it is not possible (including absolute links).
4551sub normalize_link_target {
4552        my ($link_target, $basedir) = @_;
4553
4554        # absolute symlinks (beginning with '/') cannot be normalized
4555        return if (substr($link_target, 0, 1) eq '/');
4556
4557        # normalize link target to path from top (root) tree (dir)
4558        my $path;
4559        if ($basedir) {
4560                $path = $basedir . '/' . $link_target;
4561        } else {
4562                # we are in top (root) tree (dir)
4563                $path = $link_target;
4564        }
4565
4566        # remove //, /./, and /../
4567        my @path_parts;
4568        foreach my $part (split('/', $path)) {
4569                # discard '.' and ''
4570                next if (!$part || $part eq '.');
4571                # handle '..'
4572                if ($part eq '..') {
4573                        if (@path_parts) {
4574                                pop @path_parts;
4575                        } else {
4576                                # link leads outside repository (outside top dir)
4577                                return;
4578                        }
4579                } else {
4580                        push @path_parts, $part;
4581                }
4582        }
4583        $path = join('/', @path_parts);
4584
4585        return $path;
4586}
4587
4588# print tree entry (row of git_tree), but without encompassing <tr> element
4589sub git_print_tree_entry {
4590        my ($t, $basedir, $hash_base, $have_blame) = @_;
4591
4592        my %base_key = ();
4593        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4594
4595        # The format of a table row is: mode list link.  Where mode is
4596        # the mode of the entry, list is the name of the entry, an href,
4597        # and link is the action links of the entry.
4598
4599        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4600        if (exists $t->{'size'}) {
4601                print "<td class=\"size\">$t->{'size'}</td>\n";
4602        }
4603        if ($t->{'type'} eq "blob") {
4604                print "<td class=\"list\">" .
4605                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4606                                               file_name=>"$basedir$t->{'name'}", %base_key),
4607                                -class => "list"}, esc_path($t->{'name'}));
4608                if (S_ISLNK(oct $t->{'mode'})) {
4609                        my $link_target = git_get_link_target($t->{'hash'});
4610                        if ($link_target) {
4611                                my $norm_target = normalize_link_target($link_target, $basedir);
4612                                if (defined $norm_target) {
4613                                        print " -> " .
4614                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4615                                                                     file_name=>$norm_target),
4616                                                       -title => $norm_target}, esc_path($link_target));
4617                                } else {
4618                                        print " -> " . esc_path($link_target);
4619                                }
4620                        }
4621                }
4622                print "</td>\n";
4623                print "<td class=\"link\">";
4624                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4625                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4626                              "blob");
4627                if ($have_blame) {
4628                        print " | " .
4629                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4630                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4631                                      "blame");
4632                }
4633                if (defined $hash_base) {
4634                        print " | " .
4635                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4636                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4637                                      "history");
4638                }
4639                print " | " .
4640                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4641                                               file_name=>"$basedir$t->{'name'}")},
4642                                "raw");
4643                print "</td>\n";
4644
4645        } elsif ($t->{'type'} eq "tree") {
4646                print "<td class=\"list\">";
4647                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4648                                             file_name=>"$basedir$t->{'name'}",
4649                                             %base_key)},
4650                              esc_path($t->{'name'}));
4651                print "</td>\n";
4652                print "<td class=\"link\">";
4653                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4654                                             file_name=>"$basedir$t->{'name'}",
4655                                             %base_key)},
4656                              "tree");
4657                if (defined $hash_base) {
4658                        print " | " .
4659                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4660                                                     file_name=>"$basedir$t->{'name'}")},
4661                                      "history");
4662                }
4663                print "</td>\n";
4664        } else {
4665                # unknown object: we can only present history for it
4666                # (this includes 'commit' object, i.e. submodule support)
4667                print "<td class=\"list\">" .
4668                      esc_path($t->{'name'}) .
4669                      "</td>\n";
4670                print "<td class=\"link\">";
4671                if (defined $hash_base) {
4672                        print $cgi->a({-href => href(action=>"history",
4673                                                     hash_base=>$hash_base,
4674                                                     file_name=>"$basedir$t->{'name'}")},
4675                                      "history");
4676                }
4677                print "</td>\n";
4678        }
4679}
4680
4681## ......................................................................
4682## functions printing large fragments of HTML
4683
4684# get pre-image filenames for merge (combined) diff
4685sub fill_from_file_info {
4686        my ($diff, @parents) = @_;
4687
4688        $diff->{'from_file'} = [ ];
4689        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4690        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4691                if ($diff->{'status'}[$i] eq 'R' ||
4692                    $diff->{'status'}[$i] eq 'C') {
4693                        $diff->{'from_file'}[$i] =
4694                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4695                }
4696        }
4697
4698        return $diff;
4699}
4700
4701# is current raw difftree line of file deletion
4702sub is_deleted {
4703        my $diffinfo = shift;
4704
4705        return $diffinfo->{'to_id'} eq ('0' x 40);
4706}
4707
4708# does patch correspond to [previous] difftree raw line
4709# $diffinfo  - hashref of parsed raw diff format
4710# $patchinfo - hashref of parsed patch diff format
4711#              (the same keys as in $diffinfo)
4712sub is_patch_split {
4713        my ($diffinfo, $patchinfo) = @_;
4714
4715        return defined $diffinfo && defined $patchinfo
4716                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4717}
4718
4719
4720sub git_difftree_body {
4721        my ($difftree, $hash, @parents) = @_;
4722        my ($parent) = $parents[0];
4723        my $have_blame = gitweb_check_feature('blame');
4724        print "<div class=\"list_head\">\n";
4725        if ($#{$difftree} > 10) {
4726                print(($#{$difftree} + 1) . " files changed:\n");
4727        }
4728        print "</div>\n";
4729
4730        print "<table class=\"" .
4731              (@parents > 1 ? "combined " : "") .
4732              "diff_tree\">\n";
4733
4734        # header only for combined diff in 'commitdiff' view
4735        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4736        if ($has_header) {
4737                # table header
4738                print "<thead><tr>\n" .
4739                       "<th></th><th></th>\n"; # filename, patchN link
4740                for (my $i = 0; $i < @parents; $i++) {
4741                        my $par = $parents[$i];
4742                        print "<th>" .
4743                              $cgi->a({-href => href(action=>"commitdiff",
4744                                                     hash=>$hash, hash_parent=>$par),
4745                                       -title => 'commitdiff to parent number ' .
4746                                                  ($i+1) . ': ' . substr($par,0,7)},
4747                                      $i+1) .
4748                              "&nbsp;</th>\n";
4749                }
4750                print "</tr></thead>\n<tbody>\n";
4751        }
4752
4753        my $alternate = 1;
4754        my $patchno = 0;
4755        foreach my $line (@{$difftree}) {
4756                my $diff = parsed_difftree_line($line);
4757
4758                if ($alternate) {
4759                        print "<tr class=\"dark\">\n";
4760                } else {
4761                        print "<tr class=\"light\">\n";
4762                }
4763                $alternate ^= 1;
4764
4765                if (exists $diff->{'nparents'}) { # combined diff
4766
4767                        fill_from_file_info($diff, @parents)
4768                                unless exists $diff->{'from_file'};
4769
4770                        if (!is_deleted($diff)) {
4771                                # file exists in the result (child) commit
4772                                print "<td>" .
4773                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4774                                                             file_name=>$diff->{'to_file'},
4775                                                             hash_base=>$hash),
4776                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4777                                      "</td>\n";
4778                        } else {
4779                                print "<td>" .
4780                                      esc_path($diff->{'to_file'}) .
4781                                      "</td>\n";
4782                        }
4783
4784                        if ($action eq 'commitdiff') {
4785                                # link to patch
4786                                $patchno++;
4787                                print "<td class=\"link\">" .
4788                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4789                                              "patch") .
4790                                      " | " .
4791                                      "</td>\n";
4792                        }
4793
4794                        my $has_history = 0;
4795                        my $not_deleted = 0;
4796                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4797                                my $hash_parent = $parents[$i];
4798                                my $from_hash = $diff->{'from_id'}[$i];
4799                                my $from_path = $diff->{'from_file'}[$i];
4800                                my $status = $diff->{'status'}[$i];
4801
4802                                $has_history ||= ($status ne 'A');
4803                                $not_deleted ||= ($status ne 'D');
4804
4805                                if ($status eq 'A') {
4806                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4807                                } elsif ($status eq 'D') {
4808                                        print "<td class=\"link\">" .
4809                                              $cgi->a({-href => href(action=>"blob",
4810                                                                     hash_base=>$hash,
4811                                                                     hash=>$from_hash,
4812                                                                     file_name=>$from_path)},
4813                                                      "blob" . ($i+1)) .
4814                                              " | </td>\n";
4815                                } else {
4816                                        if ($diff->{'to_id'} eq $from_hash) {
4817                                                print "<td class=\"link nochange\">";
4818                                        } else {
4819                                                print "<td class=\"link\">";
4820                                        }
4821                                        print $cgi->a({-href => href(action=>"blobdiff",
4822                                                                     hash=>$diff->{'to_id'},
4823                                                                     hash_parent=>$from_hash,
4824                                                                     hash_base=>$hash,
4825                                                                     hash_parent_base=>$hash_parent,
4826                                                                     file_name=>$diff->{'to_file'},
4827                                                                     file_parent=>$from_path)},
4828                                                      "diff" . ($i+1)) .
4829                                              " | </td>\n";
4830                                }
4831                        }
4832
4833                        print "<td class=\"link\">";
4834                        if ($not_deleted) {
4835                                print $cgi->a({-href => href(action=>"blob",
4836                                                             hash=>$diff->{'to_id'},
4837                                                             file_name=>$diff->{'to_file'},
4838                                                             hash_base=>$hash)},
4839                                              "blob");
4840                                print " | " if ($has_history);
4841                        }
4842                        if ($has_history) {
4843                                print $cgi->a({-href => href(action=>"history",
4844                                                             file_name=>$diff->{'to_file'},
4845                                                             hash_base=>$hash)},
4846                                              "history");
4847                        }
4848                        print "</td>\n";
4849
4850                        print "</tr>\n";
4851                        next; # instead of 'else' clause, to avoid extra indent
4852                }
4853                # else ordinary diff
4854
4855                my ($to_mode_oct, $to_mode_str, $to_file_type);
4856                my ($from_mode_oct, $from_mode_str, $from_file_type);
4857                if ($diff->{'to_mode'} ne ('0' x 6)) {
4858                        $to_mode_oct = oct $diff->{'to_mode'};
4859                        if (S_ISREG($to_mode_oct)) { # only for regular file
4860                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4861                        }
4862                        $to_file_type = file_type($diff->{'to_mode'});
4863                }
4864                if ($diff->{'from_mode'} ne ('0' x 6)) {
4865                        $from_mode_oct = oct $diff->{'from_mode'};
4866                        if (S_ISREG($from_mode_oct)) { # only for regular file
4867                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4868                        }
4869                        $from_file_type = file_type($diff->{'from_mode'});
4870                }
4871
4872                if ($diff->{'status'} eq "A") { # created
4873                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4874                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4875                        $mode_chng   .= "]</span>";
4876                        print "<td>";
4877                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4878                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4879                                      -class => "list"}, esc_path($diff->{'file'}));
4880                        print "</td>\n";
4881                        print "<td>$mode_chng</td>\n";
4882                        print "<td class=\"link\">";
4883                        if ($action eq 'commitdiff') {
4884                                # link to patch
4885                                $patchno++;
4886                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4887                                              "patch") .
4888                                      " | ";
4889                        }
4890                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4891                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4892                                      "blob");
4893                        print "</td>\n";
4894
4895                } elsif ($diff->{'status'} eq "D") { # deleted
4896                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4897                        print "<td>";
4898                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4899                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4900                                       -class => "list"}, esc_path($diff->{'file'}));
4901                        print "</td>\n";
4902                        print "<td>$mode_chng</td>\n";
4903                        print "<td class=\"link\">";
4904                        if ($action eq 'commitdiff') {
4905                                # link to patch
4906                                $patchno++;
4907                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4908                                              "patch") .
4909                                      " | ";
4910                        }
4911                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4912                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4913                                      "blob") . " | ";
4914                        if ($have_blame) {
4915                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4916                                                             file_name=>$diff->{'file'})},
4917                                              "blame") . " | ";
4918                        }
4919                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4920                                                     file_name=>$diff->{'file'})},
4921                                      "history");
4922                        print "</td>\n";
4923
4924                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4925                        my $mode_chnge = "";
4926                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4927                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4928                                if ($from_file_type ne $to_file_type) {
4929                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4930                                }
4931                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4932                                        if ($from_mode_str && $to_mode_str) {
4933                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4934                                        } elsif ($to_mode_str) {
4935                                                $mode_chnge .= " mode: $to_mode_str";
4936                                        }
4937                                }
4938                                $mode_chnge .= "]</span>\n";
4939                        }
4940                        print "<td>";
4941                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4942                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4943                                      -class => "list"}, esc_path($diff->{'file'}));
4944                        print "</td>\n";
4945                        print "<td>$mode_chnge</td>\n";
4946                        print "<td class=\"link\">";
4947                        if ($action eq 'commitdiff') {
4948                                # link to patch
4949                                $patchno++;
4950                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4951                                              "patch") .
4952                                      " | ";
4953                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4954                                # "commit" view and modified file (not onlu mode changed)
4955                                print $cgi->a({-href => href(action=>"blobdiff",
4956                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4957                                                             hash_base=>$hash, hash_parent_base=>$parent,
4958                                                             file_name=>$diff->{'file'})},
4959                                              "diff") .
4960                                      " | ";
4961                        }
4962                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4963                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4964                                       "blob") . " | ";
4965                        if ($have_blame) {
4966                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4967                                                             file_name=>$diff->{'file'})},
4968                                              "blame") . " | ";
4969                        }
4970                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4971                                                     file_name=>$diff->{'file'})},
4972                                      "history");
4973                        print "</td>\n";
4974
4975                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4976                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4977                        my $nstatus = $status_name{$diff->{'status'}};
4978                        my $mode_chng = "";
4979                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4980                                # mode also for directories, so we cannot use $to_mode_str
4981                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4982                        }
4983                        print "<td>" .
4984                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4985                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4986                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4987                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4988                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4989                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4990                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4991                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4992                              "<td class=\"link\">";
4993                        if ($action eq 'commitdiff') {
4994                                # link to patch
4995                                $patchno++;
4996                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4997                                              "patch") .
4998                                      " | ";
4999                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5000                                # "commit" view and modified file (not only pure rename or copy)
5001                                print $cgi->a({-href => href(action=>"blobdiff",
5002                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5003                                                             hash_base=>$hash, hash_parent_base=>$parent,
5004                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5005                                              "diff") .
5006                                      " | ";
5007                        }
5008                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5009                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5010                                      "blob") . " | ";
5011                        if ($have_blame) {
5012                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5013                                                             file_name=>$diff->{'to_file'})},
5014                                              "blame") . " | ";
5015                        }
5016                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5017                                                    file_name=>$diff->{'to_file'})},
5018                                      "history");
5019                        print "</td>\n";
5020
5021                } # we should not encounter Unmerged (U) or Unknown (X) status
5022                print "</tr>\n";
5023        }
5024        print "</tbody>" if $has_header;
5025        print "</table>\n";
5026}
5027
5028# Print context lines and then rem/add lines in a side-by-side manner.
5029sub print_sidebyside_diff_lines {
5030        my ($ctx, $rem, $add) = @_;
5031
5032        # print context block before add/rem block
5033        if (@$ctx) {
5034                print join '',
5035                        '<div class="chunk_block ctx">',
5036                                '<div class="old">',
5037                                @$ctx,
5038                                '</div>',
5039                                '<div class="new">',
5040                                @$ctx,
5041                                '</div>',
5042                        '</div>';
5043        }
5044
5045        if (!@$add) {
5046                # pure removal
5047                print join '',
5048                        '<div class="chunk_block rem">',
5049                                '<div class="old">',
5050                                @$rem,
5051                                '</div>',
5052                        '</div>';
5053        } elsif (!@$rem) {
5054                # pure addition
5055                print join '',
5056                        '<div class="chunk_block add">',
5057                                '<div class="new">',
5058                                @$add,
5059                                '</div>',
5060                        '</div>';
5061        } else {
5062                print join '',
5063                        '<div class="chunk_block chg">',
5064                                '<div class="old">',
5065                                @$rem,
5066                                '</div>',
5067                                '<div class="new">',
5068                                @$add,
5069                                '</div>',
5070                        '</div>';
5071        }
5072}
5073
5074# Print context lines and then rem/add lines in inline manner.
5075sub print_inline_diff_lines {
5076        my ($ctx, $rem, $add) = @_;
5077
5078        print @$ctx, @$rem, @$add;
5079}
5080
5081# Format removed and added line, mark changed part and HTML-format them.
5082# Implementation is based on contrib/diff-highlight
5083sub format_rem_add_lines_pair {
5084        my ($rem, $add, $num_parents) = @_;
5085
5086        # We need to untabify lines before split()'ing them;
5087        # otherwise offsets would be invalid.
5088        chomp $rem;
5089        chomp $add;
5090        $rem = untabify($rem);
5091        $add = untabify($add);
5092
5093        my @rem = split(//, $rem);
5094        my @add = split(//, $add);
5095        my ($esc_rem, $esc_add);
5096        # Ignore leading +/- characters for each parent.
5097        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5098        my ($prefix_has_nonspace, $suffix_has_nonspace);
5099
5100        my $shorter = (@rem < @add) ? @rem : @add;
5101        while ($prefix_len < $shorter) {
5102                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5103
5104                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5105                $prefix_len++;
5106        }
5107
5108        while ($prefix_len + $suffix_len < $shorter) {
5109                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5110
5111                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5112                $suffix_len++;
5113        }
5114
5115        # Mark lines that are different from each other, but have some common
5116        # part that isn't whitespace.  If lines are completely different, don't
5117        # mark them because that would make output unreadable, especially if
5118        # diff consists of multiple lines.
5119        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5120                $esc_rem = esc_html_hl_regions($rem, 'marked',
5121                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5122                $esc_add = esc_html_hl_regions($add, 'marked',
5123                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5124        } else {
5125                $esc_rem = esc_html($rem, -nbsp=>1);
5126                $esc_add = esc_html($add, -nbsp=>1);
5127        }
5128
5129        return format_diff_line(\$esc_rem, 'rem'),
5130               format_diff_line(\$esc_add, 'add');
5131}
5132
5133# HTML-format diff context, removed and added lines.
5134sub format_ctx_rem_add_lines {
5135        my ($ctx, $rem, $add, $num_parents) = @_;
5136        my (@new_ctx, @new_rem, @new_add);
5137        my $can_highlight = 0;
5138        my $is_combined = ($num_parents > 1);
5139
5140        # Highlight if every removed line has a corresponding added line.
5141        if (@$add > 0 && @$add == @$rem) {
5142                $can_highlight = 1;
5143
5144                # Highlight lines in combined diff only if the chunk contains
5145                # diff between the same version, e.g.
5146                #
5147                #    - a
5148                #   -  b
5149                #    + c
5150                #   +  d
5151                #
5152                # Otherwise the highlightling would be confusing.
5153                if ($is_combined) {
5154                        for (my $i = 0; $i < @$add; $i++) {
5155                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5156                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5157
5158                                $prefix_rem =~ s/-/+/g;
5159
5160                                if ($prefix_rem ne $prefix_add) {
5161                                        $can_highlight = 0;
5162                                        last;
5163                                }
5164                        }
5165                }
5166        }
5167
5168        if ($can_highlight) {
5169                for (my $i = 0; $i < @$add; $i++) {
5170                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5171                                $rem->[$i], $add->[$i], $num_parents);
5172                        push @new_rem, $line_rem;
5173                        push @new_add, $line_add;
5174                }
5175        } else {
5176                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5177                @new_add = map { format_diff_line($_, 'add') } @$add;
5178        }
5179
5180        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5181
5182        return (\@new_ctx, \@new_rem, \@new_add);
5183}
5184
5185# Print context lines and then rem/add lines.
5186sub print_diff_lines {
5187        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5188        my $is_combined = $num_parents > 1;
5189
5190        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5191                $num_parents);
5192
5193        if ($diff_style eq 'sidebyside' && !$is_combined) {
5194                print_sidebyside_diff_lines($ctx, $rem, $add);
5195        } else {
5196                # default 'inline' style and unknown styles
5197                print_inline_diff_lines($ctx, $rem, $add);
5198        }
5199}
5200
5201sub print_diff_chunk {
5202        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5203        my (@ctx, @rem, @add);
5204
5205        # The class of the previous line.
5206        my $prev_class = '';
5207
5208        return unless @chunk;
5209
5210        # incomplete last line might be among removed or added lines,
5211        # or both, or among context lines: find which
5212        for (my $i = 1; $i < @chunk; $i++) {
5213                if ($chunk[$i][0] eq 'incomplete') {
5214                        $chunk[$i][0] = $chunk[$i-1][0];
5215                }
5216        }
5217
5218        # guardian
5219        push @chunk, ["", ""];
5220
5221        foreach my $line_info (@chunk) {
5222                my ($class, $line) = @$line_info;
5223
5224                # print chunk headers
5225                if ($class && $class eq 'chunk_header') {
5226                        print format_diff_line($line, $class, $from, $to);
5227                        next;
5228                }
5229
5230                ## print from accumulator when have some add/rem lines or end
5231                # of chunk (flush context lines), or when have add and rem
5232                # lines and new block is reached (otherwise add/rem lines could
5233                # be reordered)
5234                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5235                    (@rem && @add && $class ne $prev_class)) {
5236                        print_diff_lines(\@ctx, \@rem, \@add,
5237                                         $diff_style, $num_parents);
5238                        @ctx = @rem = @add = ();
5239                }
5240
5241                ## adding lines to accumulator
5242                # guardian value
5243                last unless $line;
5244                # rem, add or change
5245                if ($class eq 'rem') {
5246                        push @rem, $line;
5247                } elsif ($class eq 'add') {
5248                        push @add, $line;
5249                }
5250                # context line
5251                if ($class eq 'ctx') {
5252                        push @ctx, $line;
5253                }
5254
5255                $prev_class = $class;
5256        }
5257}
5258
5259sub git_patchset_body {
5260        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5261        my ($hash_parent) = $hash_parents[0];
5262
5263        my $is_combined = (@hash_parents > 1);
5264        my $patch_idx = 0;
5265        my $patch_number = 0;
5266        my $patch_line;
5267        my $diffinfo;
5268        my $to_name;
5269        my (%from, %to);
5270        my @chunk; # for side-by-side diff
5271
5272        print "<div class=\"patchset\">\n";
5273
5274        # skip to first patch
5275        while ($patch_line = <$fd>) {
5276                chomp $patch_line;
5277
5278                last if ($patch_line =~ m/^diff /);
5279        }
5280
5281 PATCH:
5282        while ($patch_line) {
5283
5284                # parse "git diff" header line
5285                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5286                        # $1 is from_name, which we do not use
5287                        $to_name = unquote($2);
5288                        $to_name =~ s!^b/!!;
5289                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5290                        # $1 is 'cc' or 'combined', which we do not use
5291                        $to_name = unquote($2);
5292                } else {
5293                        $to_name = undef;
5294                }
5295
5296                # check if current patch belong to current raw line
5297                # and parse raw git-diff line if needed
5298                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5299                        # this is continuation of a split patch
5300                        print "<div class=\"patch cont\">\n";
5301                } else {
5302                        # advance raw git-diff output if needed
5303                        $patch_idx++ if defined $diffinfo;
5304
5305                        # read and prepare patch information
5306                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5307
5308                        # compact combined diff output can have some patches skipped
5309                        # find which patch (using pathname of result) we are at now;
5310                        if ($is_combined) {
5311                                while ($to_name ne $diffinfo->{'to_file'}) {
5312                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5313                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5314                                              "</div>\n";  # class="patch"
5315
5316                                        $patch_idx++;
5317                                        $patch_number++;
5318
5319                                        last if $patch_idx > $#$difftree;
5320                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5321                                }
5322                        }
5323
5324                        # modifies %from, %to hashes
5325                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5326
5327                        # this is first patch for raw difftree line with $patch_idx index
5328                        # we index @$difftree array from 0, but number patches from 1
5329                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5330                }
5331
5332                # git diff header
5333                #assert($patch_line =~ m/^diff /) if DEBUG;
5334                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5335                $patch_number++;
5336                # print "git diff" header
5337                print format_git_diff_header_line($patch_line, $diffinfo,
5338                                                  \%from, \%to);
5339
5340                # print extended diff header
5341                print "<div class=\"diff extended_header\">\n";
5342        EXTENDED_HEADER:
5343                while ($patch_line = <$fd>) {
5344                        chomp $patch_line;
5345
5346                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5347
5348                        print format_extended_diff_header_line($patch_line, $diffinfo,
5349                                                               \%from, \%to);
5350                }
5351                print "</div>\n"; # class="diff extended_header"
5352
5353                # from-file/to-file diff header
5354                if (! $patch_line) {
5355                        print "</div>\n"; # class="patch"
5356                        last PATCH;
5357                }
5358                next PATCH if ($patch_line =~ m/^diff /);
5359                #assert($patch_line =~ m/^---/) if DEBUG;
5360
5361                my $last_patch_line = $patch_line;
5362                $patch_line = <$fd>;
5363                chomp $patch_line;
5364                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5365
5366                print format_diff_from_to_header($last_patch_line, $patch_line,
5367                                                 $diffinfo, \%from, \%to,
5368                                                 @hash_parents);
5369
5370                # the patch itself
5371        LINE:
5372                while ($patch_line = <$fd>) {
5373                        chomp $patch_line;
5374
5375                        next PATCH if ($patch_line =~ m/^diff /);
5376
5377                        my $class = diff_line_class($patch_line, \%from, \%to);
5378
5379                        if ($class eq 'chunk_header') {
5380                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5381                                @chunk = ();
5382                        }
5383
5384                        push @chunk, [ $class, $patch_line ];
5385                }
5386
5387        } continue {
5388                if (@chunk) {
5389                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5390                        @chunk = ();
5391                }
5392                print "</div>\n"; # class="patch"
5393        }
5394
5395        # for compact combined (--cc) format, with chunk and patch simplification
5396        # the patchset might be empty, but there might be unprocessed raw lines
5397        for (++$patch_idx if $patch_number > 0;
5398             $patch_idx < @$difftree;
5399             ++$patch_idx) {
5400                # read and prepare patch information
5401                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5402
5403                # generate anchor for "patch" links in difftree / whatchanged part
5404                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5405                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5406                      "</div>\n";  # class="patch"
5407
5408                $patch_number++;
5409        }
5410
5411        if ($patch_number == 0) {
5412                if (@hash_parents > 1) {
5413                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5414                } else {
5415                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5416                }
5417        }
5418
5419        print "</div>\n"; # class="patchset"
5420}
5421
5422# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5423
5424sub git_project_search_form {
5425        my ($searchtext, $search_use_regexp) = @_;
5426
5427        my $limit = '';
5428        if ($project_filter) {
5429                $limit = " in '$project_filter/'";
5430        }
5431
5432        print "<div class=\"projsearch\">\n";
5433        print $cgi->startform(-method => 'get', -action => $my_uri) .
5434              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5435        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5436                if (defined $project_filter);
5437        print $cgi->textfield(-name => 's', -value => $searchtext,
5438                              -title => "Search project by name and description$limit",
5439                              -size => 60) . "\n" .
5440              "<span title=\"Extended regular expression\">" .
5441              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5442                             -checked => $search_use_regexp) .
5443              "</span>\n" .
5444              $cgi->submit(-name => 'btnS', -value => 'Search') .
5445              $cgi->end_form() . "\n" .
5446              $cgi->a({-href => href(project => undef, searchtext => undef,
5447                                     project_filter => $project_filter)},
5448                      esc_html("List all projects$limit")) . "<br />\n";
5449        print "</div>\n";
5450}
5451
5452# entry for given @keys needs filling if at least one of keys in list
5453# is not present in %$project_info
5454sub project_info_needs_filling {
5455        my ($project_info, @keys) = @_;
5456
5457        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5458        foreach my $key (@keys) {
5459                if (!exists $project_info->{$key}) {
5460                        return 1;
5461                }
5462        }
5463        return;
5464}
5465
5466# fills project list info (age, description, owner, category, forks, etc.)
5467# for each project in the list, removing invalid projects from
5468# returned list, or fill only specified info.
5469#
5470# Invalid projects are removed from the returned list if and only if you
5471# ask 'age' or 'age_string' to be filled, because they are the only fields
5472# that run unconditionally git command that requires repository, and
5473# therefore do always check if project repository is invalid.
5474#
5475# USAGE:
5476# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5477#   ensures that 'descr_long' and 'ctags' fields are filled
5478# * @project_list = fill_project_list_info(\@project_list)
5479#   ensures that all fields are filled (and invalid projects removed)
5480#
5481# NOTE: modifies $projlist, but does not remove entries from it
5482sub fill_project_list_info {
5483        my ($projlist, @wanted_keys) = @_;
5484        my @projects;
5485        my $filter_set = sub { return @_; };
5486        if (@wanted_keys) {
5487                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5488                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5489        }
5490
5491        my $show_ctags = gitweb_check_feature('ctags');
5492 PROJECT:
5493        foreach my $pr (@$projlist) {
5494                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5495                        my (@activity) = git_get_last_activity($pr->{'path'});
5496                        unless (@activity) {
5497                                next PROJECT;
5498                        }
5499                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5500                }
5501                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5502                        my $descr = git_get_project_description($pr->{'path'}) || "";
5503                        $descr = to_utf8($descr);
5504                        $pr->{'descr_long'} = $descr;
5505                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5506                }
5507                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5508                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5509                }
5510                if ($show_ctags &&
5511                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5512                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5513                }
5514                if ($projects_list_group_categories &&
5515                    project_info_needs_filling($pr, $filter_set->('category'))) {
5516                        my $cat = git_get_project_category($pr->{'path'}) ||
5517                                                           $project_list_default_category;
5518                        $pr->{'category'} = to_utf8($cat);
5519                }
5520
5521                push @projects, $pr;
5522        }
5523
5524        return @projects;
5525}
5526
5527sub sort_projects_list {
5528        my ($projlist, $order) = @_;
5529        my @projects;
5530
5531        my %order_info = (
5532                project => { key => 'path', type => 'str' },
5533                descr => { key => 'descr_long', type => 'str' },
5534                owner => { key => 'owner', type => 'str' },
5535                age => { key => 'age', type => 'num' }
5536        );
5537        my $oi = $order_info{$order};
5538        return @$projlist unless defined $oi;
5539        if ($oi->{'type'} eq 'str') {
5540                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5541        } else {
5542                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5543        }
5544
5545        return @projects;
5546}
5547
5548# returns a hash of categories, containing the list of project
5549# belonging to each category
5550sub build_projlist_by_category {
5551        my ($projlist, $from, $to) = @_;
5552        my %categories;
5553
5554        $from = 0 unless defined $from;
5555        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5556
5557        for (my $i = $from; $i <= $to; $i++) {
5558                my $pr = $projlist->[$i];
5559                push @{$categories{ $pr->{'category'} }}, $pr;
5560        }
5561
5562        return wantarray ? %categories : \%categories;
5563}
5564
5565# print 'sort by' <th> element, generating 'sort by $name' replay link
5566# if that order is not selected
5567sub print_sort_th {
5568        print format_sort_th(@_);
5569}
5570
5571sub format_sort_th {
5572        my ($name, $order, $header) = @_;
5573        my $sort_th = "";
5574        $header ||= ucfirst($name);
5575
5576        if ($order eq $name) {
5577                $sort_th .= "<th>$header</th>\n";
5578        } else {
5579                $sort_th .= "<th>" .
5580                            $cgi->a({-href => href(-replay=>1, order=>$name),
5581                                     -class => "header"}, $header) .
5582                            "</th>\n";
5583        }
5584
5585        return $sort_th;
5586}
5587
5588sub git_project_list_rows {
5589        my ($projlist, $from, $to, $check_forks) = @_;
5590
5591        $from = 0 unless defined $from;
5592        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5593
5594        my $alternate = 1;
5595        for (my $i = $from; $i <= $to; $i++) {
5596                my $pr = $projlist->[$i];
5597
5598                if ($alternate) {
5599                        print "<tr class=\"dark\">\n";
5600                } else {
5601                        print "<tr class=\"light\">\n";
5602                }
5603                $alternate ^= 1;
5604
5605                if ($check_forks) {
5606                        print "<td>";
5607                        if ($pr->{'forks'}) {
5608                                my $nforks = scalar @{$pr->{'forks'}};
5609                                if ($nforks > 0) {
5610                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5611                                                       -title => "$nforks forks"}, "+");
5612                                } else {
5613                                        print $cgi->span({-title => "$nforks forks"}, "+");
5614                                }
5615                        }
5616                        print "</td>\n";
5617                }
5618                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5619                                        -class => "list"},
5620                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5621                      "</td>\n" .
5622                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5623                                        -class => "list",
5624                                        -title => $pr->{'descr_long'}},
5625                                        $search_regexp
5626                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5627                                                                    $pr->{'descr'}, $search_regexp)
5628                                        : esc_html($pr->{'descr'})) .
5629                      "</td>\n";
5630                unless ($omit_owner) {
5631                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5632                }
5633                unless ($omit_age_column) {
5634                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5635                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5636                }
5637                print"<td class=\"link\">" .
5638                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5639                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5640                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5641                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5642                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5643                      "</td>\n" .
5644                      "</tr>\n";
5645        }
5646}
5647
5648sub git_project_list_body {
5649        # actually uses global variable $project
5650        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5651        my @projects = @$projlist;
5652
5653        my $check_forks = gitweb_check_feature('forks');
5654        my $show_ctags  = gitweb_check_feature('ctags');
5655        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5656        $check_forks = undef
5657                if ($tagfilter || $search_regexp);
5658
5659        # filtering out forks before filling info allows to do less work
5660        @projects = filter_forks_from_projects_list(\@projects)
5661                if ($check_forks);
5662        # search_projects_list pre-fills required info
5663        @projects = search_projects_list(\@projects,
5664                                         'search_regexp' => $search_regexp,
5665                                         'tagfilter'  => $tagfilter)
5666                if ($tagfilter || $search_regexp);
5667        # fill the rest
5668        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5669        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5670        push @all_fields, 'owner' unless($omit_owner);
5671        @projects = fill_project_list_info(\@projects, @all_fields);
5672
5673        $order ||= $default_projects_order;
5674        $from = 0 unless defined $from;
5675        $to = $#projects if (!defined $to || $#projects < $to);
5676
5677        # short circuit
5678        if ($from > $to) {
5679                print "<center>\n".
5680                      "<b>No such projects found</b><br />\n".
5681                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5682                      "</center>\n<br />\n";
5683                return;
5684        }
5685
5686        @projects = sort_projects_list(\@projects, $order);
5687
5688        if ($show_ctags) {
5689                my $ctags = git_gather_all_ctags(\@projects);
5690                my $cloud = git_populate_project_tagcloud($ctags);
5691                print git_show_project_tagcloud($cloud, 64);
5692        }
5693
5694        print "<table class=\"project_list\">\n";
5695        unless ($no_header) {
5696                print "<tr>\n";
5697                if ($check_forks) {
5698                        print "<th></th>\n";
5699                }
5700                print_sort_th('project', $order, 'Project');
5701                print_sort_th('descr', $order, 'Description');
5702                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5703                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5704                print "<th></th>\n" . # for links
5705                      "</tr>\n";
5706        }
5707
5708        if ($projects_list_group_categories) {
5709                # only display categories with projects in the $from-$to window
5710                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5711                my %categories = build_projlist_by_category(\@projects, $from, $to);
5712                foreach my $cat (sort keys %categories) {
5713                        unless ($cat eq "") {
5714                                print "<tr>\n";
5715                                if ($check_forks) {
5716                                        print "<td></td>\n";
5717                                }
5718                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5719                                print "</tr>\n";
5720                        }
5721
5722                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5723                }
5724        } else {
5725                git_project_list_rows(\@projects, $from, $to, $check_forks);
5726        }
5727
5728        if (defined $extra) {
5729                print "<tr>\n";
5730                if ($check_forks) {
5731                        print "<td></td>\n";
5732                }
5733                print "<td colspan=\"5\">$extra</td>\n" .
5734                      "</tr>\n";
5735        }
5736        print "</table>\n";
5737}
5738
5739sub git_log_body {
5740        # uses global variable $project
5741        my ($commitlist, $from, $to, $refs, $extra) = @_;
5742
5743        $from = 0 unless defined $from;
5744        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5745
5746        for (my $i = 0; $i <= $to; $i++) {
5747                my %co = %{$commitlist->[$i]};
5748                next if !%co;
5749                my $commit = $co{'id'};
5750                my $ref = format_ref_marker($refs, $commit);
5751                git_print_header_div('commit',
5752                               "<span class=\"age\">$co{'age_string'}</span>" .
5753                               esc_html($co{'title'}) . $ref,
5754                               $commit);
5755                print "<div class=\"title_text\">\n" .
5756                      "<div class=\"log_link\">\n" .
5757                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5758                      " | " .
5759                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5760                      " | " .
5761                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5762                      "<br/>\n" .
5763                      "</div>\n";
5764                      git_print_authorship(\%co, -tag => 'span');
5765                      print "<br/>\n</div>\n";
5766
5767                print "<div class=\"log_body\">\n";
5768                git_print_log($co{'comment'}, -final_empty_line=> 1);
5769                print "</div>\n";
5770        }
5771        if ($extra) {
5772                print "<div class=\"page_nav\">\n";
5773                print "$extra\n";
5774                print "</div>\n";
5775        }
5776}
5777
5778sub git_shortlog_body {
5779        # uses global variable $project
5780        my ($commitlist, $from, $to, $refs, $extra) = @_;
5781
5782        $from = 0 unless defined $from;
5783        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5784
5785        print "<table class=\"shortlog\">\n";
5786        my $alternate = 1;
5787        for (my $i = $from; $i <= $to; $i++) {
5788                my %co = %{$commitlist->[$i]};
5789                my $commit = $co{'id'};
5790                my $ref = format_ref_marker($refs, $commit);
5791                if ($alternate) {
5792                        print "<tr class=\"dark\">\n";
5793                } else {
5794                        print "<tr class=\"light\">\n";
5795                }
5796                $alternate ^= 1;
5797                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5798                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5799                      format_author_html('td', \%co, 10) . "<td>";
5800                print format_subject_html($co{'title'}, $co{'title_short'},
5801                                          href(action=>"commit", hash=>$commit), $ref);
5802                print "</td>\n" .
5803                      "<td class=\"link\">" .
5804                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5805                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5806                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5807                my $snapshot_links = format_snapshot_links($commit);
5808                if (defined $snapshot_links) {
5809                        print " | " . $snapshot_links;
5810                }
5811                print "</td>\n" .
5812                      "</tr>\n";
5813        }
5814        if (defined $extra) {
5815                print "<tr>\n" .
5816                      "<td colspan=\"4\">$extra</td>\n" .
5817                      "</tr>\n";
5818        }
5819        print "</table>\n";
5820}
5821
5822sub git_history_body {
5823        # Warning: assumes constant type (blob or tree) during history
5824        my ($commitlist, $from, $to, $refs, $extra,
5825            $file_name, $file_hash, $ftype) = @_;
5826
5827        $from = 0 unless defined $from;
5828        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5829
5830        print "<table class=\"history\">\n";
5831        my $alternate = 1;
5832        for (my $i = $from; $i <= $to; $i++) {
5833                my %co = %{$commitlist->[$i]};
5834                if (!%co) {
5835                        next;
5836                }
5837                my $commit = $co{'id'};
5838
5839                my $ref = format_ref_marker($refs, $commit);
5840
5841                if ($alternate) {
5842                        print "<tr class=\"dark\">\n";
5843                } else {
5844                        print "<tr class=\"light\">\n";
5845                }
5846                $alternate ^= 1;
5847                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5848        # shortlog:   format_author_html('td', \%co, 10)
5849                      format_author_html('td', \%co, 15, 3) . "<td>";
5850                # originally git_history used chop_str($co{'title'}, 50)
5851                print format_subject_html($co{'title'}, $co{'title_short'},
5852                                          href(action=>"commit", hash=>$commit), $ref);
5853                print "</td>\n" .
5854                      "<td class=\"link\">" .
5855                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5856                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5857
5858                if ($ftype eq 'blob') {
5859                        my $blob_current = $file_hash;
5860                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5861                        if (defined $blob_current && defined $blob_parent &&
5862                                        $blob_current ne $blob_parent) {
5863                                print " | " .
5864                                        $cgi->a({-href => href(action=>"blobdiff",
5865                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5866                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5867                                                               file_name=>$file_name)},
5868                                                "diff to current");
5869                        }
5870                }
5871                print "</td>\n" .
5872                      "</tr>\n";
5873        }
5874        if (defined $extra) {
5875                print "<tr>\n" .
5876                      "<td colspan=\"4\">$extra</td>\n" .
5877                      "</tr>\n";
5878        }
5879        print "</table>\n";
5880}
5881
5882sub git_tags_body {
5883        # uses global variable $project
5884        my ($taglist, $from, $to, $extra) = @_;
5885        $from = 0 unless defined $from;
5886        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5887
5888        print "<table class=\"tags\">\n";
5889        my $alternate = 1;
5890        for (my $i = $from; $i <= $to; $i++) {
5891                my $entry = $taglist->[$i];
5892                my %tag = %$entry;
5893                my $comment = $tag{'subject'};
5894                my $comment_short;
5895                if (defined $comment) {
5896                        $comment_short = chop_str($comment, 30, 5);
5897                }
5898                if ($alternate) {
5899                        print "<tr class=\"dark\">\n";
5900                } else {
5901                        print "<tr class=\"light\">\n";
5902                }
5903                $alternate ^= 1;
5904                if (defined $tag{'age'}) {
5905                        print "<td><i>$tag{'age'}</i></td>\n";
5906                } else {
5907                        print "<td></td>\n";
5908                }
5909                print "<td>" .
5910                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5911                               -class => "list name"}, esc_html($tag{'name'})) .
5912                      "</td>\n" .
5913                      "<td>";
5914                if (defined $comment) {
5915                        print format_subject_html($comment, $comment_short,
5916                                                  href(action=>"tag", hash=>$tag{'id'}));
5917                }
5918                print "</td>\n" .
5919                      "<td class=\"selflink\">";
5920                if ($tag{'type'} eq "tag") {
5921                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5922                } else {
5923                        print "&nbsp;";
5924                }
5925                print "</td>\n" .
5926                      "<td class=\"link\">" . " | " .
5927                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5928                if ($tag{'reftype'} eq "commit") {
5929                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5930                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5931                } elsif ($tag{'reftype'} eq "blob") {
5932                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5933                }
5934                print "</td>\n" .
5935                      "</tr>";
5936        }
5937        if (defined $extra) {
5938                print "<tr>\n" .
5939                      "<td colspan=\"5\">$extra</td>\n" .
5940                      "</tr>\n";
5941        }
5942        print "</table>\n";
5943}
5944
5945sub git_heads_body {
5946        # uses global variable $project
5947        my ($headlist, $head_at, $from, $to, $extra) = @_;
5948        $from = 0 unless defined $from;
5949        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5950
5951        print "<table class=\"heads\">\n";
5952        my $alternate = 1;
5953        for (my $i = $from; $i <= $to; $i++) {
5954                my $entry = $headlist->[$i];
5955                my %ref = %$entry;
5956                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5957                if ($alternate) {
5958                        print "<tr class=\"dark\">\n";
5959                } else {
5960                        print "<tr class=\"light\">\n";
5961                }
5962                $alternate ^= 1;
5963                print "<td><i>$ref{'age'}</i></td>\n" .
5964                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5965                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5966                               -class => "list name"},esc_html($ref{'name'})) .
5967                      "</td>\n" .
5968                      "<td class=\"link\">" .
5969                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5970                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5971                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5972                      "</td>\n" .
5973                      "</tr>";
5974        }
5975        if (defined $extra) {
5976                print "<tr>\n" .
5977                      "<td colspan=\"3\">$extra</td>\n" .
5978                      "</tr>\n";
5979        }
5980        print "</table>\n";
5981}
5982
5983# Display a single remote block
5984sub git_remote_block {
5985        my ($remote, $rdata, $limit, $head) = @_;
5986
5987        my $heads = $rdata->{'heads'};
5988        my $fetch = $rdata->{'fetch'};
5989        my $push = $rdata->{'push'};
5990
5991        my $urls_table = "<table class=\"projects_list\">\n" ;
5992
5993        if (defined $fetch) {
5994                if ($fetch eq $push) {
5995                        $urls_table .= format_repo_url("URL", $fetch);
5996                } else {
5997                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5998                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5999                }
6000        } elsif (defined $push) {
6001                $urls_table .= format_repo_url("Push URL", $push);
6002        } else {
6003                $urls_table .= format_repo_url("", "No remote URL");
6004        }
6005
6006        $urls_table .= "</table>\n";
6007
6008        my $dots;
6009        if (defined $limit && $limit < @$heads) {
6010                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6011        }
6012
6013        print $urls_table;
6014        git_heads_body($heads, $head, 0, $limit, $dots);
6015}
6016
6017# Display a list of remote names with the respective fetch and push URLs
6018sub git_remotes_list {
6019        my ($remotedata, $limit) = @_;
6020        print "<table class=\"heads\">\n";
6021        my $alternate = 1;
6022        my @remotes = sort keys %$remotedata;
6023
6024        my $limited = $limit && $limit < @remotes;
6025
6026        $#remotes = $limit - 1 if $limited;
6027
6028        while (my $remote = shift @remotes) {
6029                my $rdata = $remotedata->{$remote};
6030                my $fetch = $rdata->{'fetch'};
6031                my $push = $rdata->{'push'};
6032                if ($alternate) {
6033                        print "<tr class=\"dark\">\n";
6034                } else {
6035                        print "<tr class=\"light\">\n";
6036                }
6037                $alternate ^= 1;
6038                print "<td>" .
6039                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6040                               -class=> "list name"},esc_html($remote)) .
6041                      "</td>";
6042                print "<td class=\"link\">" .
6043                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6044                      " | " .
6045                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6046                      "</td>";
6047
6048                print "</tr>\n";
6049        }
6050
6051        if ($limited) {
6052                print "<tr>\n" .
6053                      "<td colspan=\"3\">" .
6054                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6055                      "</td>\n" . "</tr>\n";
6056        }
6057
6058        print "</table>";
6059}
6060
6061# Display remote heads grouped by remote, unless there are too many
6062# remotes, in which case we only display the remote names
6063sub git_remotes_body {
6064        my ($remotedata, $limit, $head) = @_;
6065        if ($limit and $limit < keys %$remotedata) {
6066                git_remotes_list($remotedata, $limit);
6067        } else {
6068                fill_remote_heads($remotedata);
6069                while (my ($remote, $rdata) = each %$remotedata) {
6070                        git_print_section({-class=>"remote", -id=>$remote},
6071                                ["remotes", $remote, $remote], sub {
6072                                        git_remote_block($remote, $rdata, $limit, $head);
6073                                });
6074                }
6075        }
6076}
6077
6078sub git_search_message {
6079        my %co = @_;
6080
6081        my $greptype;
6082        if ($searchtype eq 'commit') {
6083                $greptype = "--grep=";
6084        } elsif ($searchtype eq 'author') {
6085                $greptype = "--author=";
6086        } elsif ($searchtype eq 'committer') {
6087                $greptype = "--committer=";
6088        }
6089        $greptype .= $searchtext;
6090        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6091                                       $greptype, '--regexp-ignore-case',
6092                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6093
6094        my $paging_nav = '';
6095        if ($page > 0) {
6096                $paging_nav .=
6097                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6098                                "first") .
6099                        " &sdot; " .
6100                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6101                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6102        } else {
6103                $paging_nav .= "first &sdot; prev";
6104        }
6105        my $next_link = '';
6106        if ($#commitlist >= 100) {
6107                $next_link =
6108                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6109                                 -accesskey => "n", -title => "Alt-n"}, "next");
6110                $paging_nav .= " &sdot; $next_link";
6111        } else {
6112                $paging_nav .= " &sdot; next";
6113        }
6114
6115        git_header_html();
6116
6117        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6118        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6119        if ($page == 0 && !@commitlist) {
6120                print "<p>No match.</p>\n";
6121        } else {
6122                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6123        }
6124
6125        git_footer_html();
6126}
6127
6128sub git_search_changes {
6129        my %co = @_;
6130
6131        local $/ = "\n";
6132        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6133                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6134                ($search_use_regexp ? '--pickaxe-regex' : ())
6135                        or die_error(500, "Open git-log failed");
6136
6137        git_header_html();
6138
6139        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6140        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6141
6142        print "<table class=\"pickaxe search\">\n";
6143        my $alternate = 1;
6144        undef %co;
6145        my @files;
6146        while (my $line = <$fd>) {
6147                chomp $line;
6148                next unless $line;
6149
6150                my %set = parse_difftree_raw_line($line);
6151                if (defined $set{'commit'}) {
6152                        # finish previous commit
6153                        if (%co) {
6154                                print "</td>\n" .
6155                                      "<td class=\"link\">" .
6156                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6157                                              "commit") .
6158                                      " | " .
6159                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6160                                                             hash_base=>$co{'id'})},
6161                                              "tree") .
6162                                      "</td>\n" .
6163                                      "</tr>\n";
6164                        }
6165
6166                        if ($alternate) {
6167                                print "<tr class=\"dark\">\n";
6168                        } else {
6169                                print "<tr class=\"light\">\n";
6170                        }
6171                        $alternate ^= 1;
6172                        %co = parse_commit($set{'commit'});
6173                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6174                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6175                              "<td><i>$author</i></td>\n" .
6176                              "<td>" .
6177                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6178                                      -class => "list subject"},
6179                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6180                } elsif (defined $set{'to_id'}) {
6181                        next if ($set{'to_id'} =~ m/^0{40}$/);
6182
6183                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6184                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6185                                      -class => "list"},
6186                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6187                              "<br/>\n";
6188                }
6189        }
6190        close $fd;
6191
6192        # finish last commit (warning: repetition!)
6193        if (%co) {
6194                print "</td>\n" .
6195                      "<td class=\"link\">" .
6196                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6197                              "commit") .
6198                      " | " .
6199                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6200                                             hash_base=>$co{'id'})},
6201                              "tree") .
6202                      "</td>\n" .
6203                      "</tr>\n";
6204        }
6205
6206        print "</table>\n";
6207
6208        git_footer_html();
6209}
6210
6211sub git_search_files {
6212        my %co = @_;
6213
6214        local $/ = "\n";
6215        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6216                $search_use_regexp ? ('-E', '-i') : '-F',
6217                $searchtext, $co{'tree'}
6218                        or die_error(500, "Open git-grep failed");
6219
6220        git_header_html();
6221
6222        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6223        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6224
6225        print "<table class=\"grep_search\">\n";
6226        my $alternate = 1;
6227        my $matches = 0;
6228        my $lastfile = '';
6229        my $file_href;
6230        while (my $line = <$fd>) {
6231                chomp $line;
6232                my ($file, $lno, $ltext, $binary);
6233                last if ($matches++ > 1000);
6234                if ($line =~ /^Binary file (.+) matches$/) {
6235                        $file = $1;
6236                        $binary = 1;
6237                } else {
6238                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6239                        $file =~ s/^$co{'tree'}://;
6240                }
6241                if ($file ne $lastfile) {
6242                        $lastfile and print "</td></tr>\n";
6243                        if ($alternate++) {
6244                                print "<tr class=\"dark\">\n";
6245                        } else {
6246                                print "<tr class=\"light\">\n";
6247                        }
6248                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6249                                          file_name=>$file);
6250                        print "<td class=\"list\">".
6251                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6252                        print "</td><td>\n";
6253                        $lastfile = $file;
6254                }
6255                if ($binary) {
6256                        print "<div class=\"binary\">Binary file</div>\n";
6257                } else {
6258                        $ltext = untabify($ltext);
6259                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6260                                $ltext = esc_html($1, -nbsp=>1);
6261                                $ltext .= '<span class="match">';
6262                                $ltext .= esc_html($2, -nbsp=>1);
6263                                $ltext .= '</span>';
6264                                $ltext .= esc_html($3, -nbsp=>1);
6265                        } else {
6266                                $ltext = esc_html($ltext, -nbsp=>1);
6267                        }
6268                        print "<div class=\"pre\">" .
6269                                $cgi->a({-href => $file_href.'#l'.$lno,
6270                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6271                                ' ' .  $ltext . "</div>\n";
6272                }
6273        }
6274        if ($lastfile) {
6275                print "</td></tr>\n";
6276                if ($matches > 1000) {
6277                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6278                }
6279        } else {
6280                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6281        }
6282        close $fd;
6283
6284        print "</table>\n";
6285
6286        git_footer_html();
6287}
6288
6289sub git_search_grep_body {
6290        my ($commitlist, $from, $to, $extra) = @_;
6291        $from = 0 unless defined $from;
6292        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6293
6294        print "<table class=\"commit_search\">\n";
6295        my $alternate = 1;
6296        for (my $i = $from; $i <= $to; $i++) {
6297                my %co = %{$commitlist->[$i]};
6298                if (!%co) {
6299                        next;
6300                }
6301                my $commit = $co{'id'};
6302                if ($alternate) {
6303                        print "<tr class=\"dark\">\n";
6304                } else {
6305                        print "<tr class=\"light\">\n";
6306                }
6307                $alternate ^= 1;
6308                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6309                      format_author_html('td', \%co, 15, 5) .
6310                      "<td>" .
6311                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6312                               -class => "list subject"},
6313                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6314                my $comment = $co{'comment'};
6315                foreach my $line (@$comment) {
6316                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6317                                my ($lead, $match, $trail) = ($1, $2, $3);
6318                                $match = chop_str($match, 70, 5, 'center');
6319                                my $contextlen = int((80 - length($match))/2);
6320                                $contextlen = 30 if ($contextlen > 30);
6321                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6322                                $trail = chop_str($trail, $contextlen, 10, 'right');
6323
6324                                $lead  = esc_html($lead);
6325                                $match = esc_html($match);
6326                                $trail = esc_html($trail);
6327
6328                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6329                        }
6330                }
6331                print "</td>\n" .
6332                      "<td class=\"link\">" .
6333                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6334                      " | " .
6335                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6336                      " | " .
6337                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6338                print "</td>\n" .
6339                      "</tr>\n";
6340        }
6341        if (defined $extra) {
6342                print "<tr>\n" .
6343                      "<td colspan=\"3\">$extra</td>\n" .
6344                      "</tr>\n";
6345        }
6346        print "</table>\n";
6347}
6348
6349## ======================================================================
6350## ======================================================================
6351## actions
6352
6353sub git_project_list {
6354        my $order = $input_params{'order'};
6355        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6356                die_error(400, "Unknown order parameter");
6357        }
6358
6359        my @list = git_get_projects_list($project_filter, $strict_export);
6360        if (!@list) {
6361                die_error(404, "No projects found");
6362        }
6363
6364        git_header_html();
6365        if (defined $home_text && -f $home_text) {
6366                print "<div class=\"index_include\">\n";
6367                insert_file($home_text);
6368                print "</div>\n";
6369        }
6370
6371        git_project_search_form($searchtext, $search_use_regexp);
6372        git_project_list_body(\@list, $order);
6373        git_footer_html();
6374}
6375
6376sub git_forks {
6377        my $order = $input_params{'order'};
6378        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6379                die_error(400, "Unknown order parameter");
6380        }
6381
6382        my $filter = $project;
6383        $filter =~ s/\.git$//;
6384        my @list = git_get_projects_list($filter);
6385        if (!@list) {
6386                die_error(404, "No forks found");
6387        }
6388
6389        git_header_html();
6390        git_print_page_nav('','');
6391        git_print_header_div('summary', "$project forks");
6392        git_project_list_body(\@list, $order);
6393        git_footer_html();
6394}
6395
6396sub git_project_index {
6397        my @projects = git_get_projects_list($project_filter, $strict_export);
6398        if (!@projects) {
6399                die_error(404, "No projects found");
6400        }
6401
6402        print $cgi->header(
6403                -type => 'text/plain',
6404                -charset => 'utf-8',
6405                -content_disposition => 'inline; filename="index.aux"');
6406
6407        foreach my $pr (@projects) {
6408                if (!exists $pr->{'owner'}) {
6409                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6410                }
6411
6412                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6413                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6414                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6415                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6416                $path  =~ s/ /\+/g;
6417                $owner =~ s/ /\+/g;
6418
6419                print "$path $owner\n";
6420        }
6421}
6422
6423sub git_summary {
6424        my $descr = git_get_project_description($project) || "none";
6425        my %co = parse_commit("HEAD");
6426        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6427        my $head = $co{'id'};
6428        my $remote_heads = gitweb_check_feature('remote_heads');
6429
6430        my $owner = git_get_project_owner($project);
6431
6432        my $refs = git_get_references();
6433        # These get_*_list functions return one more to allow us to see if
6434        # there are more ...
6435        my @taglist  = git_get_tags_list(16);
6436        my @headlist = git_get_heads_list(16);
6437        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6438        my @forklist;
6439        my $check_forks = gitweb_check_feature('forks');
6440
6441        if ($check_forks) {
6442                # find forks of a project
6443                my $filter = $project;
6444                $filter =~ s/\.git$//;
6445                @forklist = git_get_projects_list($filter);
6446                # filter out forks of forks
6447                @forklist = filter_forks_from_projects_list(\@forklist)
6448                        if (@forklist);
6449        }
6450
6451        git_header_html();
6452        git_print_page_nav('summary','', $head);
6453
6454        print "<div class=\"title\">&nbsp;</div>\n";
6455        print "<table class=\"projects_list\">\n" .
6456              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6457        unless ($omit_owner) {
6458                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6459        }
6460        if (defined $cd{'rfc2822'}) {
6461                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6462                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6463        }
6464
6465        # use per project git URL list in $projectroot/$project/cloneurl
6466        # or make project git URL from git base URL and project name
6467        my $url_tag = "URL";
6468        my @url_list = git_get_project_url_list($project);
6469        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6470        foreach my $git_url (@url_list) {
6471                next unless $git_url;
6472                print format_repo_url($url_tag, $git_url);
6473                $url_tag = "";
6474        }
6475
6476        # Tag cloud
6477        my $show_ctags = gitweb_check_feature('ctags');
6478        if ($show_ctags) {
6479                my $ctags = git_get_project_ctags($project);
6480                if (%$ctags) {
6481                        # without ability to add tags, don't show if there are none
6482                        my $cloud = git_populate_project_tagcloud($ctags);
6483                        print "<tr id=\"metadata_ctags\">" .
6484                              "<td>content tags</td>" .
6485                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6486                              "</tr>\n";
6487                }
6488        }
6489
6490        print "</table>\n";
6491
6492        # If XSS prevention is on, we don't include README.html.
6493        # TODO: Allow a readme in some safe format.
6494        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6495                print "<div class=\"title\">readme</div>\n" .
6496                      "<div class=\"readme\">\n";
6497                insert_file("$projectroot/$project/README.html");
6498                print "\n</div>\n"; # class="readme"
6499        }
6500
6501        # we need to request one more than 16 (0..15) to check if
6502        # those 16 are all
6503        my @commitlist = $head ? parse_commits($head, 17) : ();
6504        if (@commitlist) {
6505                git_print_header_div('shortlog');
6506                git_shortlog_body(\@commitlist, 0, 15, $refs,
6507                                  $#commitlist <=  15 ? undef :
6508                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6509        }
6510
6511        if (@taglist) {
6512                git_print_header_div('tags');
6513                git_tags_body(\@taglist, 0, 15,
6514                              $#taglist <=  15 ? undef :
6515                              $cgi->a({-href => href(action=>"tags")}, "..."));
6516        }
6517
6518        if (@headlist) {
6519                git_print_header_div('heads');
6520                git_heads_body(\@headlist, $head, 0, 15,
6521                               $#headlist <= 15 ? undef :
6522                               $cgi->a({-href => href(action=>"heads")}, "..."));
6523        }
6524
6525        if (%remotedata) {
6526                git_print_header_div('remotes');
6527                git_remotes_body(\%remotedata, 15, $head);
6528        }
6529
6530        if (@forklist) {
6531                git_print_header_div('forks');
6532                git_project_list_body(\@forklist, 'age', 0, 15,
6533                                      $#forklist <= 15 ? undef :
6534                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6535                                      'no_header');
6536        }
6537
6538        git_footer_html();
6539}
6540
6541sub git_tag {
6542        my %tag = parse_tag($hash);
6543
6544        if (! %tag) {
6545                die_error(404, "Unknown tag object");
6546        }
6547
6548        my $head = git_get_head_hash($project);
6549        git_header_html();
6550        git_print_page_nav('','', $head,undef,$head);
6551        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6552        print "<div class=\"title_text\">\n" .
6553              "<table class=\"object_header\">\n" .
6554              "<tr>\n" .
6555              "<td>object</td>\n" .
6556              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6557                               $tag{'object'}) . "</td>\n" .
6558              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6559                                              $tag{'type'}) . "</td>\n" .
6560              "</tr>\n";
6561        if (defined($tag{'author'})) {
6562                git_print_authorship_rows(\%tag, 'author');
6563        }
6564        print "</table>\n\n" .
6565              "</div>\n";
6566        print "<div class=\"page_body\">";
6567        my $comment = $tag{'comment'};
6568        foreach my $line (@$comment) {
6569                chomp $line;
6570                print esc_html($line, -nbsp=>1) . "<br/>\n";
6571        }
6572        print "</div>\n";
6573        git_footer_html();
6574}
6575
6576sub git_blame_common {
6577        my $format = shift || 'porcelain';
6578        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6579                $format = 'incremental';
6580                $action = 'blame_incremental'; # for page title etc
6581        }
6582
6583        # permissions
6584        gitweb_check_feature('blame')
6585                or die_error(403, "Blame view not allowed");
6586
6587        # error checking
6588        die_error(400, "No file name given") unless $file_name;
6589        $hash_base ||= git_get_head_hash($project);
6590        die_error(404, "Couldn't find base commit") unless $hash_base;
6591        my %co = parse_commit($hash_base)
6592                or die_error(404, "Commit not found");
6593        my $ftype = "blob";
6594        if (!defined $hash) {
6595                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6596                        or die_error(404, "Error looking up file");
6597        } else {
6598                $ftype = git_get_type($hash);
6599                if ($ftype !~ "blob") {
6600                        die_error(400, "Object is not a blob");
6601                }
6602        }
6603
6604        my $fd;
6605        if ($format eq 'incremental') {
6606                # get file contents (as base)
6607                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6608                        or die_error(500, "Open git-cat-file failed");
6609        } elsif ($format eq 'data') {
6610                # run git-blame --incremental
6611                open $fd, "-|", git_cmd(), "blame", "--incremental",
6612                        $hash_base, "--", $file_name
6613                        or die_error(500, "Open git-blame --incremental failed");
6614        } else {
6615                # run git-blame --porcelain
6616                open $fd, "-|", git_cmd(), "blame", '-p',
6617                        $hash_base, '--', $file_name
6618                        or die_error(500, "Open git-blame --porcelain failed");
6619        }
6620
6621        # incremental blame data returns early
6622        if ($format eq 'data') {
6623                print $cgi->header(
6624                        -type=>"text/plain", -charset => "utf-8",
6625                        -status=> "200 OK");
6626                local $| = 1; # output autoflush
6627                while (my $line = <$fd>) {
6628                        print to_utf8($line);
6629                }
6630                close $fd
6631                        or print "ERROR $!\n";
6632
6633                print 'END';
6634                if (defined $t0 && gitweb_check_feature('timed')) {
6635                        print ' '.
6636                              tv_interval($t0, [ gettimeofday() ]).
6637                              ' '.$number_of_git_cmds;
6638                }
6639                print "\n";
6640
6641                return;
6642        }
6643
6644        # page header
6645        git_header_html();
6646        my $formats_nav =
6647                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6648                        "blob") .
6649                " | ";
6650        if ($format eq 'incremental') {
6651                $formats_nav .=
6652                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6653                                "blame") . " (non-incremental)";
6654        } else {
6655                $formats_nav .=
6656                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6657                                "blame") . " (incremental)";
6658        }
6659        $formats_nav .=
6660                " | " .
6661                $cgi->a({-href => href(action=>"history", -replay=>1)},
6662                        "history") .
6663                " | " .
6664                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6665                        "HEAD");
6666        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6667        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6668        git_print_page_path($file_name, $ftype, $hash_base);
6669
6670        # page body
6671        if ($format eq 'incremental') {
6672                print "<noscript>\n<div class=\"error\"><center><b>\n".
6673                      "This page requires JavaScript to run.\n Use ".
6674                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6675                              'this page').
6676                      " instead.\n".
6677                      "</b></center></div>\n</noscript>\n";
6678
6679                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6680        }
6681
6682        print qq!<div class="page_body">\n!;
6683        print qq!<div id="progress_info">... / ...</div>\n!
6684                if ($format eq 'incremental');
6685        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6686              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6687              qq!<thead>\n!.
6688              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6689              qq!</thead>\n!.
6690              qq!<tbody>\n!;
6691
6692        my @rev_color = qw(light dark);
6693        my $num_colors = scalar(@rev_color);
6694        my $current_color = 0;
6695
6696        if ($format eq 'incremental') {
6697                my $color_class = $rev_color[$current_color];
6698
6699                #contents of a file
6700                my $linenr = 0;
6701        LINE:
6702                while (my $line = <$fd>) {
6703                        chomp $line;
6704                        $linenr++;
6705
6706                        print qq!<tr id="l$linenr" class="$color_class">!.
6707                              qq!<td class="sha1"><a href=""> </a></td>!.
6708                              qq!<td class="linenr">!.
6709                              qq!<a class="linenr" href="">$linenr</a></td>!;
6710                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6711                        print qq!</tr>\n!;
6712                }
6713
6714        } else { # porcelain, i.e. ordinary blame
6715                my %metainfo = (); # saves information about commits
6716
6717                # blame data
6718        LINE:
6719                while (my $line = <$fd>) {
6720                        chomp $line;
6721                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6722                        # no <lines in group> for subsequent lines in group of lines
6723                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6724                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6725                        if (!exists $metainfo{$full_rev}) {
6726                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6727                        }
6728                        my $meta = $metainfo{$full_rev};
6729                        my $data;
6730                        while ($data = <$fd>) {
6731                                chomp $data;
6732                                last if ($data =~ s/^\t//); # contents of line
6733                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6734                                        $meta->{$1} = $2 unless exists $meta->{$1};
6735                                }
6736                                if ($data =~ /^previous /) {
6737                                        $meta->{'nprevious'}++;
6738                                }
6739                        }
6740                        my $short_rev = substr($full_rev, 0, 8);
6741                        my $author = $meta->{'author'};
6742                        my %date =
6743                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6744                        my $date = $date{'iso-tz'};
6745                        if ($group_size) {
6746                                $current_color = ($current_color + 1) % $num_colors;
6747                        }
6748                        my $tr_class = $rev_color[$current_color];
6749                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6750                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6751                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6752                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6753                        if ($group_size) {
6754                                print "<td class=\"sha1\"";
6755                                print " title=\"". esc_html($author) . ", $date\"";
6756                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6757                                print ">";
6758                                print $cgi->a({-href => href(action=>"commit",
6759                                                             hash=>$full_rev,
6760                                                             file_name=>$file_name)},
6761                                              esc_html($short_rev));
6762                                if ($group_size >= 2) {
6763                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6764                                        if (@author_initials) {
6765                                                print "<br />" .
6766                                                      esc_html(join('', @author_initials));
6767                                                #           or join('.', ...)
6768                                        }
6769                                }
6770                                print "</td>\n";
6771                        }
6772                        # 'previous' <sha1 of parent commit> <filename at commit>
6773                        if (exists $meta->{'previous'} &&
6774                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6775                                $meta->{'parent'} = $1;
6776                                $meta->{'file_parent'} = unquote($2);
6777                        }
6778                        my $linenr_commit =
6779                                exists($meta->{'parent'}) ?
6780                                $meta->{'parent'} : $full_rev;
6781                        my $linenr_filename =
6782                                exists($meta->{'file_parent'}) ?
6783                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6784                        my $blamed = href(action => 'blame',
6785                                          file_name => $linenr_filename,
6786                                          hash_base => $linenr_commit);
6787                        print "<td class=\"linenr\">";
6788                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6789                                        -class => "linenr" },
6790                                      esc_html($lineno));
6791                        print "</td>";
6792                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6793                        print "</tr>\n";
6794                } # end while
6795
6796        }
6797
6798        # footer
6799        print "</tbody>\n".
6800              "</table>\n"; # class="blame"
6801        print "</div>\n";   # class="blame_body"
6802        close $fd
6803                or print "Reading blob failed\n";
6804
6805        git_footer_html();
6806}
6807
6808sub git_blame {
6809        git_blame_common();
6810}
6811
6812sub git_blame_incremental {
6813        git_blame_common('incremental');
6814}
6815
6816sub git_blame_data {
6817        git_blame_common('data');
6818}
6819
6820sub git_tags {
6821        my $head = git_get_head_hash($project);
6822        git_header_html();
6823        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6824        git_print_header_div('summary', $project);
6825
6826        my @tagslist = git_get_tags_list();
6827        if (@tagslist) {
6828                git_tags_body(\@tagslist);
6829        }
6830        git_footer_html();
6831}
6832
6833sub git_heads {
6834        my $head = git_get_head_hash($project);
6835        git_header_html();
6836        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6837        git_print_header_div('summary', $project);
6838
6839        my @headslist = git_get_heads_list();
6840        if (@headslist) {
6841                git_heads_body(\@headslist, $head);
6842        }
6843        git_footer_html();
6844}
6845
6846# used both for single remote view and for list of all the remotes
6847sub git_remotes {
6848        gitweb_check_feature('remote_heads')
6849                or die_error(403, "Remote heads view is disabled");
6850
6851        my $head = git_get_head_hash($project);
6852        my $remote = $input_params{'hash'};
6853
6854        my $remotedata = git_get_remotes_list($remote);
6855        die_error(500, "Unable to get remote information") unless defined $remotedata;
6856
6857        unless (%$remotedata) {
6858                die_error(404, defined $remote ?
6859                        "Remote $remote not found" :
6860                        "No remotes found");
6861        }
6862
6863        git_header_html(undef, undef, -action_extra => $remote);
6864        git_print_page_nav('', '',  $head, undef, $head,
6865                format_ref_views($remote ? '' : 'remotes'));
6866
6867        fill_remote_heads($remotedata);
6868        if (defined $remote) {
6869                git_print_header_div('remotes', "$remote remote for $project");
6870                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6871        } else {
6872                git_print_header_div('summary', "$project remotes");
6873                git_remotes_body($remotedata, undef, $head);
6874        }
6875
6876        git_footer_html();
6877}
6878
6879sub git_blob_plain {
6880        my $type = shift;
6881        my $expires;
6882
6883        if (!defined $hash) {
6884                if (defined $file_name) {
6885                        my $base = $hash_base || git_get_head_hash($project);
6886                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6887                                or die_error(404, "Cannot find file");
6888                } else {
6889                        die_error(400, "No file name defined");
6890                }
6891        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6892                # blobs defined by non-textual hash id's can be cached
6893                $expires = "+1d";
6894        }
6895
6896        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6897                or die_error(500, "Open git-cat-file blob '$hash' failed");
6898
6899        # content-type (can include charset)
6900        $type = blob_contenttype($fd, $file_name, $type);
6901
6902        # "save as" filename, even when no $file_name is given
6903        my $save_as = "$hash";
6904        if (defined $file_name) {
6905                $save_as = $file_name;
6906        } elsif ($type =~ m/^text\//) {
6907                $save_as .= '.txt';
6908        }
6909
6910        # With XSS prevention on, blobs of all types except a few known safe
6911        # ones are served with "Content-Disposition: attachment" to make sure
6912        # they don't run in our security domain.  For certain image types,
6913        # blob view writes an <img> tag referring to blob_plain view, and we
6914        # want to be sure not to break that by serving the image as an
6915        # attachment (though Firefox 3 doesn't seem to care).
6916        my $sandbox = $prevent_xss &&
6917                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6918
6919        # serve text/* as text/plain
6920        if ($prevent_xss &&
6921            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6922             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6923                my $rest = $1;
6924                $rest = defined $rest ? $rest : '';
6925                $type = "text/plain$rest";
6926        }
6927
6928        print $cgi->header(
6929                -type => $type,
6930                -expires => $expires,
6931                -content_disposition =>
6932                        ($sandbox ? 'attachment' : 'inline')
6933                        . '; filename="' . $save_as . '"');
6934        local $/ = undef;
6935        binmode STDOUT, ':raw';
6936        print <$fd>;
6937        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6938        close $fd;
6939}
6940
6941sub git_blob {
6942        my $expires;
6943
6944        if (!defined $hash) {
6945                if (defined $file_name) {
6946                        my $base = $hash_base || git_get_head_hash($project);
6947                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6948                                or die_error(404, "Cannot find file");
6949                } else {
6950                        die_error(400, "No file name defined");
6951                }
6952        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6953                # blobs defined by non-textual hash id's can be cached
6954                $expires = "+1d";
6955        }
6956
6957        my $have_blame = gitweb_check_feature('blame');
6958        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6959                or die_error(500, "Couldn't cat $file_name, $hash");
6960        my $mimetype = blob_mimetype($fd, $file_name);
6961        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6962        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6963                close $fd;
6964                return git_blob_plain($mimetype);
6965        }
6966        # we can have blame only for text/* mimetype
6967        $have_blame &&= ($mimetype =~ m!^text/!);
6968
6969        my $highlight = gitweb_check_feature('highlight');
6970        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6971        $fd = run_highlighter($fd, $highlight, $syntax)
6972                if $syntax;
6973
6974        git_header_html(undef, $expires);
6975        my $formats_nav = '';
6976        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6977                if (defined $file_name) {
6978                        if ($have_blame) {
6979                                $formats_nav .=
6980                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6981                                                "blame") .
6982                                        " | ";
6983                        }
6984                        $formats_nav .=
6985                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6986                                        "history") .
6987                                " | " .
6988                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6989                                        "raw") .
6990                                " | " .
6991                                $cgi->a({-href => href(action=>"blob",
6992                                                       hash_base=>"HEAD", file_name=>$file_name)},
6993                                        "HEAD");
6994                } else {
6995                        $formats_nav .=
6996                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6997                                        "raw");
6998                }
6999                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7000                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7001        } else {
7002                print "<div class=\"page_nav\">\n" .
7003                      "<br/><br/></div>\n" .
7004                      "<div class=\"title\">".esc_html($hash)."</div>\n";
7005        }
7006        git_print_page_path($file_name, "blob", $hash_base);
7007        print "<div class=\"page_body\">\n";
7008        if ($mimetype =~ m!^image/!) {
7009                print qq!<img type="!.esc_attr($mimetype).qq!"!;
7010                if ($file_name) {
7011                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7012                }
7013                print qq! src="! .
7014                      href(action=>"blob_plain", hash=>$hash,
7015                           hash_base=>$hash_base, file_name=>$file_name) .
7016                      qq!" />\n!;
7017        } else {
7018                my $nr;
7019                while (my $line = <$fd>) {
7020                        chomp $line;
7021                        $nr++;
7022                        $line = untabify($line);
7023                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7024                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7025                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7026                }
7027        }
7028        close $fd
7029                or print "Reading blob failed.\n";
7030        print "</div>";
7031        git_footer_html();
7032}
7033
7034sub git_tree {
7035        if (!defined $hash_base) {
7036                $hash_base = "HEAD";
7037        }
7038        if (!defined $hash) {
7039                if (defined $file_name) {
7040                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7041                } else {
7042                        $hash = $hash_base;
7043                }
7044        }
7045        die_error(404, "No such tree") unless defined($hash);
7046
7047        my $show_sizes = gitweb_check_feature('show-sizes');
7048        my $have_blame = gitweb_check_feature('blame');
7049
7050        my @entries = ();
7051        {
7052                local $/ = "\0";
7053                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7054                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7055                        or die_error(500, "Open git-ls-tree failed");
7056                @entries = map { chomp; $_ } <$fd>;
7057                close $fd
7058                        or die_error(404, "Reading tree failed");
7059        }
7060
7061        my $refs = git_get_references();
7062        my $ref = format_ref_marker($refs, $hash_base);
7063        git_header_html();
7064        my $basedir = '';
7065        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7066                my @views_nav = ();
7067                if (defined $file_name) {
7068                        push @views_nav,
7069                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7070                                        "history"),
7071                                $cgi->a({-href => href(action=>"tree",
7072                                                       hash_base=>"HEAD", file_name=>$file_name)},
7073                                        "HEAD"),
7074                }
7075                my $snapshot_links = format_snapshot_links($hash);
7076                if (defined $snapshot_links) {
7077                        # FIXME: Should be available when we have no hash base as well.
7078                        push @views_nav, $snapshot_links;
7079                }
7080                git_print_page_nav('tree','', $hash_base, undef, undef,
7081                                   join(' | ', @views_nav));
7082                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7083        } else {
7084                undef $hash_base;
7085                print "<div class=\"page_nav\">\n";
7086                print "<br/><br/></div>\n";
7087                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7088        }
7089        if (defined $file_name) {
7090                $basedir = $file_name;
7091                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7092                        $basedir .= '/';
7093                }
7094                git_print_page_path($file_name, 'tree', $hash_base);
7095        }
7096        print "<div class=\"page_body\">\n";
7097        print "<table class=\"tree\">\n";
7098        my $alternate = 1;
7099        # '..' (top directory) link if possible
7100        if (defined $hash_base &&
7101            defined $file_name && $file_name =~ m![^/]+$!) {
7102                if ($alternate) {
7103                        print "<tr class=\"dark\">\n";
7104                } else {
7105                        print "<tr class=\"light\">\n";
7106                }
7107                $alternate ^= 1;
7108
7109                my $up = $file_name;
7110                $up =~ s!/?[^/]+$!!;
7111                undef $up unless $up;
7112                # based on git_print_tree_entry
7113                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7114                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7115                print '<td class="list">';
7116                print $cgi->a({-href => href(action=>"tree",
7117                                             hash_base=>$hash_base,
7118                                             file_name=>$up)},
7119                              "..");
7120                print "</td>\n";
7121                print "<td class=\"link\"></td>\n";
7122
7123                print "</tr>\n";
7124        }
7125        foreach my $line (@entries) {
7126                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7127
7128                if ($alternate) {
7129                        print "<tr class=\"dark\">\n";
7130                } else {
7131                        print "<tr class=\"light\">\n";
7132                }
7133                $alternate ^= 1;
7134
7135                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7136
7137                print "</tr>\n";
7138        }
7139        print "</table>\n" .
7140              "</div>";
7141        git_footer_html();
7142}
7143
7144sub snapshot_name {
7145        my ($project, $hash) = @_;
7146
7147        # path/to/project.git  -> project
7148        # path/to/project/.git -> project
7149        my $name = to_utf8($project);
7150        $name =~ s,([^/])/*\.git$,$1,;
7151        $name = basename($name);
7152        # sanitize name
7153        $name =~ s/[[:cntrl:]]/?/g;
7154
7155        my $ver = $hash;
7156        if ($hash =~ /^[0-9a-fA-F]+$/) {
7157                # shorten SHA-1 hash
7158                my $full_hash = git_get_full_hash($project, $hash);
7159                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7160                        $ver = git_get_short_hash($project, $hash);
7161                }
7162        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7163                # tags don't need shortened SHA-1 hash
7164                $ver = $1;
7165        } else {
7166                # branches and other need shortened SHA-1 hash
7167                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7168                        $ver = $1;
7169                }
7170                $ver .= '-' . git_get_short_hash($project, $hash);
7171        }
7172        # in case of hierarchical branch names
7173        $ver =~ s!/!.!g;
7174
7175        # name = project-version_string
7176        $name = "$name-$ver";
7177
7178        return wantarray ? ($name, $name) : $name;
7179}
7180
7181sub exit_if_unmodified_since {
7182        my ($latest_epoch) = @_;
7183        our $cgi;
7184
7185        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7186        if (defined $if_modified) {
7187                my $since;
7188                if (eval { require HTTP::Date; 1; }) {
7189                        $since = HTTP::Date::str2time($if_modified);
7190                } elsif (eval { require Time::ParseDate; 1; }) {
7191                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7192                }
7193                if (defined $since && $latest_epoch <= $since) {
7194                        my %latest_date = parse_date($latest_epoch);
7195                        print $cgi->header(
7196                                -last_modified => $latest_date{'rfc2822'},
7197                                -status => '304 Not Modified');
7198                        goto DONE_GITWEB;
7199                }
7200        }
7201}
7202
7203sub git_snapshot {
7204        my $format = $input_params{'snapshot_format'};
7205        if (!@snapshot_fmts) {
7206                die_error(403, "Snapshots not allowed");
7207        }
7208        # default to first supported snapshot format
7209        $format ||= $snapshot_fmts[0];
7210        if ($format !~ m/^[a-z0-9]+$/) {
7211                die_error(400, "Invalid snapshot format parameter");
7212        } elsif (!exists($known_snapshot_formats{$format})) {
7213                die_error(400, "Unknown snapshot format");
7214        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7215                die_error(403, "Snapshot format not allowed");
7216        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7217                die_error(403, "Unsupported snapshot format");
7218        }
7219
7220        my $type = git_get_type("$hash^{}");
7221        if (!$type) {
7222                die_error(404, 'Object does not exist');
7223        }  elsif ($type eq 'blob') {
7224                die_error(400, 'Object is not a tree-ish');
7225        }
7226
7227        my ($name, $prefix) = snapshot_name($project, $hash);
7228        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7229
7230        my %co = parse_commit($hash);
7231        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7232
7233        my $cmd = quote_command(
7234                git_cmd(), 'archive',
7235                "--format=$known_snapshot_formats{$format}{'format'}",
7236                "--prefix=$prefix/", $hash);
7237        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7238                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7239        }
7240
7241        $filename =~ s/(["\\])/\\$1/g;
7242        my %latest_date;
7243        if (%co) {
7244                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7245        }
7246
7247        print $cgi->header(
7248                -type => $known_snapshot_formats{$format}{'type'},
7249                -content_disposition => 'inline; filename="' . $filename . '"',
7250                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7251                -status => '200 OK');
7252
7253        open my $fd, "-|", $cmd
7254                or die_error(500, "Execute git-archive failed");
7255        binmode STDOUT, ':raw';
7256        print <$fd>;
7257        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7258        close $fd;
7259}
7260
7261sub git_log_generic {
7262        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7263
7264        my $head = git_get_head_hash($project);
7265        if (!defined $base) {
7266                $base = $head;
7267        }
7268        if (!defined $page) {
7269                $page = 0;
7270        }
7271        my $refs = git_get_references();
7272
7273        my $commit_hash = $base;
7274        if (defined $parent) {
7275                $commit_hash = "$parent..$base";
7276        }
7277        my @commitlist =
7278                parse_commits($commit_hash, 101, (100 * $page),
7279                              defined $file_name ? ($file_name, "--full-history") : ());
7280
7281        my $ftype;
7282        if (!defined $file_hash && defined $file_name) {
7283                # some commits could have deleted file in question,
7284                # and not have it in tree, but one of them has to have it
7285                for (my $i = 0; $i < @commitlist; $i++) {
7286                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7287                        last if defined $file_hash;
7288                }
7289        }
7290        if (defined $file_hash) {
7291                $ftype = git_get_type($file_hash);
7292        }
7293        if (defined $file_name && !defined $ftype) {
7294                die_error(500, "Unknown type of object");
7295        }
7296        my %co;
7297        if (defined $file_name) {
7298                %co = parse_commit($base)
7299                        or die_error(404, "Unknown commit object");
7300        }
7301
7302
7303        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7304        my $next_link = '';
7305        if ($#commitlist >= 100) {
7306                $next_link =
7307                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7308                                 -accesskey => "n", -title => "Alt-n"}, "next");
7309        }
7310        my $patch_max = gitweb_get_feature('patches');
7311        if ($patch_max && !defined $file_name) {
7312                if ($patch_max < 0 || @commitlist <= $patch_max) {
7313                        $paging_nav .= " &sdot; " .
7314                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7315                                        "patches");
7316                }
7317        }
7318
7319        git_header_html();
7320        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7321        if (defined $file_name) {
7322                git_print_header_div('commit', esc_html($co{'title'}), $base);
7323        } else {
7324                git_print_header_div('summary', $project)
7325        }
7326        git_print_page_path($file_name, $ftype, $hash_base)
7327                if (defined $file_name);
7328
7329        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7330                     $file_name, $file_hash, $ftype);
7331
7332        git_footer_html();
7333}
7334
7335sub git_log {
7336        git_log_generic('log', \&git_log_body,
7337                        $hash, $hash_parent);
7338}
7339
7340sub git_commit {
7341        $hash ||= $hash_base || "HEAD";
7342        my %co = parse_commit($hash)
7343            or die_error(404, "Unknown commit object");
7344
7345        my $parent  = $co{'parent'};
7346        my $parents = $co{'parents'}; # listref
7347
7348        # we need to prepare $formats_nav before any parameter munging
7349        my $formats_nav;
7350        if (!defined $parent) {
7351                # --root commitdiff
7352                $formats_nav .= '(initial)';
7353        } elsif (@$parents == 1) {
7354                # single parent commit
7355                $formats_nav .=
7356                        '(parent: ' .
7357                        $cgi->a({-href => href(action=>"commit",
7358                                               hash=>$parent)},
7359                                esc_html(substr($parent, 0, 7))) .
7360                        ')';
7361        } else {
7362                # merge commit
7363                $formats_nav .=
7364                        '(merge: ' .
7365                        join(' ', map {
7366                                $cgi->a({-href => href(action=>"commit",
7367                                                       hash=>$_)},
7368                                        esc_html(substr($_, 0, 7)));
7369                        } @$parents ) .
7370                        ')';
7371        }
7372        if (gitweb_check_feature('patches') && @$parents <= 1) {
7373                $formats_nav .= " | " .
7374                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7375                                "patch");
7376        }
7377
7378        if (!defined $parent) {
7379                $parent = "--root";
7380        }
7381        my @difftree;
7382        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7383                @diff_opts,
7384                (@$parents <= 1 ? $parent : '-c'),
7385                $hash, "--"
7386                or die_error(500, "Open git-diff-tree failed");
7387        @difftree = map { chomp; $_ } <$fd>;
7388        close $fd or die_error(404, "Reading git-diff-tree failed");
7389
7390        # non-textual hash id's can be cached
7391        my $expires;
7392        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7393                $expires = "+1d";
7394        }
7395        my $refs = git_get_references();
7396        my $ref = format_ref_marker($refs, $co{'id'});
7397
7398        git_header_html(undef, $expires);
7399        git_print_page_nav('commit', '',
7400                           $hash, $co{'tree'}, $hash,
7401                           $formats_nav);
7402
7403        if (defined $co{'parent'}) {
7404                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7405        } else {
7406                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7407        }
7408        print "<div class=\"title_text\">\n" .
7409              "<table class=\"object_header\">\n";
7410        git_print_authorship_rows(\%co);
7411        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7412        print "<tr>" .
7413              "<td>tree</td>" .
7414              "<td class=\"sha1\">" .
7415              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7416                       class => "list"}, $co{'tree'}) .
7417              "</td>" .
7418              "<td class=\"link\">" .
7419              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7420                      "tree");
7421        my $snapshot_links = format_snapshot_links($hash);
7422        if (defined $snapshot_links) {
7423                print " | " . $snapshot_links;
7424        }
7425        print "</td>" .
7426              "</tr>\n";
7427
7428        foreach my $par (@$parents) {
7429                print "<tr>" .
7430                      "<td>parent</td>" .
7431                      "<td class=\"sha1\">" .
7432                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7433                               class => "list"}, $par) .
7434                      "</td>" .
7435                      "<td class=\"link\">" .
7436                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7437                      " | " .
7438                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7439                      "</td>" .
7440                      "</tr>\n";
7441        }
7442        print "</table>".
7443              "</div>\n";
7444
7445        print "<div class=\"page_body\">\n";
7446        git_print_log($co{'comment'});
7447        print "</div>\n";
7448
7449        git_difftree_body(\@difftree, $hash, @$parents);
7450
7451        git_footer_html();
7452}
7453
7454sub git_object {
7455        # object is defined by:
7456        # - hash or hash_base alone
7457        # - hash_base and file_name
7458        my $type;
7459
7460        # - hash or hash_base alone
7461        if ($hash || ($hash_base && !defined $file_name)) {
7462                my $object_id = $hash || $hash_base;
7463
7464                open my $fd, "-|", quote_command(
7465                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7466                        or die_error(404, "Object does not exist");
7467                $type = <$fd>;
7468                chomp $type;
7469                close $fd
7470                        or die_error(404, "Object does not exist");
7471
7472        # - hash_base and file_name
7473        } elsif ($hash_base && defined $file_name) {
7474                $file_name =~ s,/+$,,;
7475
7476                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7477                        or die_error(404, "Base object does not exist");
7478
7479                # here errors should not hapen
7480                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7481                        or die_error(500, "Open git-ls-tree failed");
7482                my $line = <$fd>;
7483                close $fd;
7484
7485                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7486                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7487                        die_error(404, "File or directory for given base does not exist");
7488                }
7489                $type = $2;
7490                $hash = $3;
7491        } else {
7492                die_error(400, "Not enough information to find object");
7493        }
7494
7495        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7496                                          hash=>$hash, hash_base=>$hash_base,
7497                                          file_name=>$file_name),
7498                             -status => '302 Found');
7499}
7500
7501sub git_blobdiff {
7502        my $format = shift || 'html';
7503        my $diff_style = $input_params{'diff_style'} || 'inline';
7504
7505        my $fd;
7506        my @difftree;
7507        my %diffinfo;
7508        my $expires;
7509
7510        # preparing $fd and %diffinfo for git_patchset_body
7511        # new style URI
7512        if (defined $hash_base && defined $hash_parent_base) {
7513                if (defined $file_name) {
7514                        # read raw output
7515                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7516                                $hash_parent_base, $hash_base,
7517                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7518                                or die_error(500, "Open git-diff-tree failed");
7519                        @difftree = map { chomp; $_ } <$fd>;
7520                        close $fd
7521                                or die_error(404, "Reading git-diff-tree failed");
7522                        @difftree
7523                                or die_error(404, "Blob diff not found");
7524
7525                } elsif (defined $hash &&
7526                         $hash =~ /[0-9a-fA-F]{40}/) {
7527                        # try to find filename from $hash
7528
7529                        # read filtered raw output
7530                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7531                                $hash_parent_base, $hash_base, "--"
7532                                or die_error(500, "Open git-diff-tree failed");
7533                        @difftree =
7534                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7535                                # $hash == to_id
7536                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7537                                map { chomp; $_ } <$fd>;
7538                        close $fd
7539                                or die_error(404, "Reading git-diff-tree failed");
7540                        @difftree
7541                                or die_error(404, "Blob diff not found");
7542
7543                } else {
7544                        die_error(400, "Missing one of the blob diff parameters");
7545                }
7546
7547                if (@difftree > 1) {
7548                        die_error(400, "Ambiguous blob diff specification");
7549                }
7550
7551                %diffinfo = parse_difftree_raw_line($difftree[0]);
7552                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7553                $file_name   ||= $diffinfo{'to_file'};
7554
7555                $hash_parent ||= $diffinfo{'from_id'};
7556                $hash        ||= $diffinfo{'to_id'};
7557
7558                # non-textual hash id's can be cached
7559                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7560                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7561                        $expires = '+1d';
7562                }
7563
7564                # open patch output
7565                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7566                        '-p', ($format eq 'html' ? "--full-index" : ()),
7567                        $hash_parent_base, $hash_base,
7568                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7569                        or die_error(500, "Open git-diff-tree failed");
7570        }
7571
7572        # old/legacy style URI -- not generated anymore since 1.4.3.
7573        if (!%diffinfo) {
7574                die_error('404 Not Found', "Missing one of the blob diff parameters")
7575        }
7576
7577        # header
7578        if ($format eq 'html') {
7579                my $formats_nav =
7580                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7581                                "raw");
7582                $formats_nav .= diff_style_nav($diff_style);
7583                git_header_html(undef, $expires);
7584                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7585                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7586                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7587                } else {
7588                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7589                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7590                }
7591                if (defined $file_name) {
7592                        git_print_page_path($file_name, "blob", $hash_base);
7593                } else {
7594                        print "<div class=\"page_path\"></div>\n";
7595                }
7596
7597        } elsif ($format eq 'plain') {
7598                print $cgi->header(
7599                        -type => 'text/plain',
7600                        -charset => 'utf-8',
7601                        -expires => $expires,
7602                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7603
7604                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7605
7606        } else {
7607                die_error(400, "Unknown blobdiff format");
7608        }
7609
7610        # patch
7611        if ($format eq 'html') {
7612                print "<div class=\"page_body\">\n";
7613
7614                git_patchset_body($fd, $diff_style,
7615                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7616                close $fd;
7617
7618                print "</div>\n"; # class="page_body"
7619                git_footer_html();
7620
7621        } else {
7622                while (my $line = <$fd>) {
7623                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7624                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7625
7626                        print $line;
7627
7628                        last if $line =~ m!^\+\+\+!;
7629                }
7630                local $/ = undef;
7631                print <$fd>;
7632                close $fd;
7633        }
7634}
7635
7636sub git_blobdiff_plain {
7637        git_blobdiff('plain');
7638}
7639
7640# assumes that it is added as later part of already existing navigation,
7641# so it returns "| foo | bar" rather than just "foo | bar"
7642sub diff_style_nav {
7643        my ($diff_style, $is_combined) = @_;
7644        $diff_style ||= 'inline';
7645
7646        return "" if ($is_combined);
7647
7648        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7649        my %styles = @styles;
7650        @styles =
7651                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7652
7653        return join '',
7654                map { " | ".$_ }
7655                map {
7656                        $_ eq $diff_style ? $styles{$_} :
7657                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7658                } @styles;
7659}
7660
7661sub git_commitdiff {
7662        my %params = @_;
7663        my $format = $params{-format} || 'html';
7664        my $diff_style = $input_params{'diff_style'} || 'inline';
7665
7666        my ($patch_max) = gitweb_get_feature('patches');
7667        if ($format eq 'patch') {
7668                die_error(403, "Patch view not allowed") unless $patch_max;
7669        }
7670
7671        $hash ||= $hash_base || "HEAD";
7672        my %co = parse_commit($hash)
7673            or die_error(404, "Unknown commit object");
7674
7675        # choose format for commitdiff for merge
7676        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7677                $hash_parent = '--cc';
7678        }
7679        # we need to prepare $formats_nav before almost any parameter munging
7680        my $formats_nav;
7681        if ($format eq 'html') {
7682                $formats_nav =
7683                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7684                                "raw");
7685                if ($patch_max && @{$co{'parents'}} <= 1) {
7686                        $formats_nav .= " | " .
7687                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7688                                        "patch");
7689                }
7690                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7691
7692                if (defined $hash_parent &&
7693                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7694                        # commitdiff with two commits given
7695                        my $hash_parent_short = $hash_parent;
7696                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7697                                $hash_parent_short = substr($hash_parent, 0, 7);
7698                        }
7699                        $formats_nav .=
7700                                ' (from';
7701                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7702                                if ($co{'parents'}[$i] eq $hash_parent) {
7703                                        $formats_nav .= ' parent ' . ($i+1);
7704                                        last;
7705                                }
7706                        }
7707                        $formats_nav .= ': ' .
7708                                $cgi->a({-href => href(-replay=>1,
7709                                                       hash=>$hash_parent, hash_base=>undef)},
7710                                        esc_html($hash_parent_short)) .
7711                                ')';
7712                } elsif (!$co{'parent'}) {
7713                        # --root commitdiff
7714                        $formats_nav .= ' (initial)';
7715                } elsif (scalar @{$co{'parents'}} == 1) {
7716                        # single parent commit
7717                        $formats_nav .=
7718                                ' (parent: ' .
7719                                $cgi->a({-href => href(-replay=>1,
7720                                                       hash=>$co{'parent'}, hash_base=>undef)},
7721                                        esc_html(substr($co{'parent'}, 0, 7))) .
7722                                ')';
7723                } else {
7724                        # merge commit
7725                        if ($hash_parent eq '--cc') {
7726                                $formats_nav .= ' | ' .
7727                                        $cgi->a({-href => href(-replay=>1,
7728                                                               hash=>$hash, hash_parent=>'-c')},
7729                                                'combined');
7730                        } else { # $hash_parent eq '-c'
7731                                $formats_nav .= ' | ' .
7732                                        $cgi->a({-href => href(-replay=>1,
7733                                                               hash=>$hash, hash_parent=>'--cc')},
7734                                                'compact');
7735                        }
7736                        $formats_nav .=
7737                                ' (merge: ' .
7738                                join(' ', map {
7739                                        $cgi->a({-href => href(-replay=>1,
7740                                                               hash=>$_, hash_base=>undef)},
7741                                                esc_html(substr($_, 0, 7)));
7742                                } @{$co{'parents'}} ) .
7743                                ')';
7744                }
7745        }
7746
7747        my $hash_parent_param = $hash_parent;
7748        if (!defined $hash_parent_param) {
7749                # --cc for multiple parents, --root for parentless
7750                $hash_parent_param =
7751                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7752        }
7753
7754        # read commitdiff
7755        my $fd;
7756        my @difftree;
7757        if ($format eq 'html') {
7758                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7759                        "--no-commit-id", "--patch-with-raw", "--full-index",
7760                        $hash_parent_param, $hash, "--"
7761                        or die_error(500, "Open git-diff-tree failed");
7762
7763                while (my $line = <$fd>) {
7764                        chomp $line;
7765                        # empty line ends raw part of diff-tree output
7766                        last unless $line;
7767                        push @difftree, scalar parse_difftree_raw_line($line);
7768                }
7769
7770        } elsif ($format eq 'plain') {
7771                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7772                        '-p', $hash_parent_param, $hash, "--"
7773                        or die_error(500, "Open git-diff-tree failed");
7774        } elsif ($format eq 'patch') {
7775                # For commit ranges, we limit the output to the number of
7776                # patches specified in the 'patches' feature.
7777                # For single commits, we limit the output to a single patch,
7778                # diverging from the git-format-patch default.
7779                my @commit_spec = ();
7780                if ($hash_parent) {
7781                        if ($patch_max > 0) {
7782                                push @commit_spec, "-$patch_max";
7783                        }
7784                        push @commit_spec, '-n', "$hash_parent..$hash";
7785                } else {
7786                        if ($params{-single}) {
7787                                push @commit_spec, '-1';
7788                        } else {
7789                                if ($patch_max > 0) {
7790                                        push @commit_spec, "-$patch_max";
7791                                }
7792                                push @commit_spec, "-n";
7793                        }
7794                        push @commit_spec, '--root', $hash;
7795                }
7796                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7797                        '--encoding=utf8', '--stdout', @commit_spec
7798                        or die_error(500, "Open git-format-patch failed");
7799        } else {
7800                die_error(400, "Unknown commitdiff format");
7801        }
7802
7803        # non-textual hash id's can be cached
7804        my $expires;
7805        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7806                $expires = "+1d";
7807        }
7808
7809        # write commit message
7810        if ($format eq 'html') {
7811                my $refs = git_get_references();
7812                my $ref = format_ref_marker($refs, $co{'id'});
7813
7814                git_header_html(undef, $expires);
7815                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7816                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7817                print "<div class=\"title_text\">\n" .
7818                      "<table class=\"object_header\">\n";
7819                git_print_authorship_rows(\%co);
7820                print "</table>".
7821                      "</div>\n";
7822                print "<div class=\"page_body\">\n";
7823                if (@{$co{'comment'}} > 1) {
7824                        print "<div class=\"log\">\n";
7825                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7826                        print "</div>\n"; # class="log"
7827                }
7828
7829        } elsif ($format eq 'plain') {
7830                my $refs = git_get_references("tags");
7831                my $tagname = git_get_rev_name_tags($hash);
7832                my $filename = basename($project) . "-$hash.patch";
7833
7834                print $cgi->header(
7835                        -type => 'text/plain',
7836                        -charset => 'utf-8',
7837                        -expires => $expires,
7838                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7839                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7840                print "From: " . to_utf8($co{'author'}) . "\n";
7841                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7842                print "Subject: " . to_utf8($co{'title'}) . "\n";
7843
7844                print "X-Git-Tag: $tagname\n" if $tagname;
7845                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7846
7847                foreach my $line (@{$co{'comment'}}) {
7848                        print to_utf8($line) . "\n";
7849                }
7850                print "---\n\n";
7851        } elsif ($format eq 'patch') {
7852                my $filename = basename($project) . "-$hash.patch";
7853
7854                print $cgi->header(
7855                        -type => 'text/plain',
7856                        -charset => 'utf-8',
7857                        -expires => $expires,
7858                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7859        }
7860
7861        # write patch
7862        if ($format eq 'html') {
7863                my $use_parents = !defined $hash_parent ||
7864                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7865                git_difftree_body(\@difftree, $hash,
7866                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7867                print "<br/>\n";
7868
7869                git_patchset_body($fd, $diff_style,
7870                                  \@difftree, $hash,
7871                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7872                close $fd;
7873                print "</div>\n"; # class="page_body"
7874                git_footer_html();
7875
7876        } elsif ($format eq 'plain') {
7877                local $/ = undef;
7878                print <$fd>;
7879                close $fd
7880                        or print "Reading git-diff-tree failed\n";
7881        } elsif ($format eq 'patch') {
7882                local $/ = undef;
7883                print <$fd>;
7884                close $fd
7885                        or print "Reading git-format-patch failed\n";
7886        }
7887}
7888
7889sub git_commitdiff_plain {
7890        git_commitdiff(-format => 'plain');
7891}
7892
7893# format-patch-style patches
7894sub git_patch {
7895        git_commitdiff(-format => 'patch', -single => 1);
7896}
7897
7898sub git_patches {
7899        git_commitdiff(-format => 'patch');
7900}
7901
7902sub git_history {
7903        git_log_generic('history', \&git_history_body,
7904                        $hash_base, $hash_parent_base,
7905                        $file_name, $hash);
7906}
7907
7908sub git_search {
7909        $searchtype ||= 'commit';
7910
7911        # check if appropriate features are enabled
7912        gitweb_check_feature('search')
7913                or die_error(403, "Search is disabled");
7914        if ($searchtype eq 'pickaxe') {
7915                # pickaxe may take all resources of your box and run for several minutes
7916                # with every query - so decide by yourself how public you make this feature
7917                gitweb_check_feature('pickaxe')
7918                        or die_error(403, "Pickaxe search is disabled");
7919        }
7920        if ($searchtype eq 'grep') {
7921                # grep search might be potentially CPU-intensive, too
7922                gitweb_check_feature('grep')
7923                        or die_error(403, "Grep search is disabled");
7924        }
7925
7926        if (!defined $searchtext) {
7927                die_error(400, "Text field is empty");
7928        }
7929        if (!defined $hash) {
7930                $hash = git_get_head_hash($project);
7931        }
7932        my %co = parse_commit($hash);
7933        if (!%co) {
7934                die_error(404, "Unknown commit object");
7935        }
7936        if (!defined $page) {
7937                $page = 0;
7938        }
7939
7940        if ($searchtype eq 'commit' ||
7941            $searchtype eq 'author' ||
7942            $searchtype eq 'committer') {
7943                git_search_message(%co);
7944        } elsif ($searchtype eq 'pickaxe') {
7945                git_search_changes(%co);
7946        } elsif ($searchtype eq 'grep') {
7947                git_search_files(%co);
7948        } else {
7949                die_error(400, "Unknown search type");
7950        }
7951}
7952
7953sub git_search_help {
7954        git_header_html();
7955        git_print_page_nav('','', $hash,$hash,$hash);
7956        print <<EOT;
7957<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7958regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7959the pattern entered is recognized as the POSIX extended
7960<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7961insensitive).</p>
7962<dl>
7963<dt><b>commit</b></dt>
7964<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7965EOT
7966        my $have_grep = gitweb_check_feature('grep');
7967        if ($have_grep) {
7968                print <<EOT;
7969<dt><b>grep</b></dt>
7970<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7971    a different one) are searched for the given pattern. On large trees, this search can take
7972a while and put some strain on the server, so please use it with some consideration. Note that
7973due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7974case-sensitive.</dd>
7975EOT
7976        }
7977        print <<EOT;
7978<dt><b>author</b></dt>
7979<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7980<dt><b>committer</b></dt>
7981<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7982EOT
7983        my $have_pickaxe = gitweb_check_feature('pickaxe');
7984        if ($have_pickaxe) {
7985                print <<EOT;
7986<dt><b>pickaxe</b></dt>
7987<dd>All commits that caused the string to appear or disappear from any file (changes that
7988added, removed or "modified" the string) will be listed. This search can take a while and
7989takes a lot of strain on the server, so please use it wisely. Note that since you may be
7990interested even in changes just changing the case as well, this search is case sensitive.</dd>
7991EOT
7992        }
7993        print "</dl>\n";
7994        git_footer_html();
7995}
7996
7997sub git_shortlog {
7998        git_log_generic('shortlog', \&git_shortlog_body,
7999                        $hash, $hash_parent);
8000}
8001
8002## ......................................................................
8003## feeds (RSS, Atom; OPML)
8004
8005sub git_feed {
8006        my $format = shift || 'atom';
8007        my $have_blame = gitweb_check_feature('blame');
8008
8009        # Atom: http://www.atomenabled.org/developers/syndication/
8010        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8011        if ($format ne 'rss' && $format ne 'atom') {
8012                die_error(400, "Unknown web feed format");
8013        }
8014
8015        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8016        my $head = $hash || 'HEAD';
8017        my @commitlist = parse_commits($head, 150, 0, $file_name);
8018
8019        my %latest_commit;
8020        my %latest_date;
8021        my $content_type = "application/$format+xml";
8022        if (defined $cgi->http('HTTP_ACCEPT') &&
8023                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8024                # browser (feed reader) prefers text/xml
8025                $content_type = 'text/xml';
8026        }
8027        if (defined($commitlist[0])) {
8028                %latest_commit = %{$commitlist[0]};
8029                my $latest_epoch = $latest_commit{'committer_epoch'};
8030                exit_if_unmodified_since($latest_epoch);
8031                %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8032        }
8033        print $cgi->header(
8034                -type => $content_type,
8035                -charset => 'utf-8',
8036                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8037                -status => '200 OK');
8038
8039        # Optimization: skip generating the body if client asks only
8040        # for Last-Modified date.
8041        return if ($cgi->request_method() eq 'HEAD');
8042
8043        # header variables
8044        my $title = "$site_name - $project/$action";
8045        my $feed_type = 'log';
8046        if (defined $hash) {
8047                $title .= " - '$hash'";
8048                $feed_type = 'branch log';
8049                if (defined $file_name) {
8050                        $title .= " :: $file_name";
8051                        $feed_type = 'history';
8052                }
8053        } elsif (defined $file_name) {
8054                $title .= " - $file_name";
8055                $feed_type = 'history';
8056        }
8057        $title .= " $feed_type";
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}