Andrew's git - gitweb.git/blob - gitweb/gitweb.perl

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