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 $signoff = 0;
4488        my $empty = 0;
4489        foreach my $line (@$log) {
4490                if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4491                        $signoff = 1;
4492                        $empty = 0;
4493                        if (! $opts{'-remove_signoff'}) {
4494                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4495                                next;
4496                        } else {
4497                                # remove signoff lines
4498                                next;
4499                        }
4500                } else {
4501                        $signoff = 0;
4502                }
4503
4504                # print only one empty line
4505                # do not print empty line after signoff
4506                if ($line eq "") {
4507                        next if ($empty || $signoff);
4508                        $empty = 1;
4509                } else {
4510                        $empty = 0;
4511                }
4512
4513                print format_log_line_html($line) . "<br/>\n";
4514        }
4515
4516        if ($opts{'-final_empty_line'}) {
4517                # end with single empty line
4518                print "<br/>\n" unless $empty;
4519        }
4520}
4521
4522# return link target (what link points to)
4523sub git_get_link_target {
4524        my $hash = shift;
4525        my $link_target;
4526
4527        # read link
4528        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4529                or return;
4530        {
4531                local $/ = undef;
4532                $link_target = <$fd>;
4533        }
4534        close $fd
4535                or return;
4536
4537        return $link_target;
4538}
4539
4540# given link target, and the directory (basedir) the link is in,
4541# return target of link relative to top directory (top tree);
4542# return undef if it is not possible (including absolute links).
4543sub normalize_link_target {
4544        my ($link_target, $basedir) = @_;
4545
4546        # absolute symlinks (beginning with '/') cannot be normalized
4547        return if (substr($link_target, 0, 1) eq '/');
4548
4549        # normalize link target to path from top (root) tree (dir)
4550        my $path;
4551        if ($basedir) {
4552                $path = $basedir . '/' . $link_target;
4553        } else {
4554                # we are in top (root) tree (dir)
4555                $path = $link_target;
4556        }
4557
4558        # remove //, /./, and /../
4559        my @path_parts;
4560        foreach my $part (split('/', $path)) {
4561                # discard '.' and ''
4562                next if (!$part || $part eq '.');
4563                # handle '..'
4564                if ($part eq '..') {
4565                        if (@path_parts) {
4566                                pop @path_parts;
4567                        } else {
4568                                # link leads outside repository (outside top dir)
4569                                return;
4570                        }
4571                } else {
4572                        push @path_parts, $part;
4573                }
4574        }
4575        $path = join('/', @path_parts);
4576
4577        return $path;
4578}
4579
4580# print tree entry (row of git_tree), but without encompassing <tr> element
4581sub git_print_tree_entry {
4582        my ($t, $basedir, $hash_base, $have_blame) = @_;
4583
4584        my %base_key = ();
4585        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4586
4587        # The format of a table row is: mode list link.  Where mode is
4588        # the mode of the entry, list is the name of the entry, an href,
4589        # and link is the action links of the entry.
4590
4591        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4592        if (exists $t->{'size'}) {
4593                print "<td class=\"size\">$t->{'size'}</td>\n";
4594        }
4595        if ($t->{'type'} eq "blob") {
4596                print "<td class=\"list\">" .
4597                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4598                                               file_name=>"$basedir$t->{'name'}", %base_key),
4599                                -class => "list"}, esc_path($t->{'name'}));
4600                if (S_ISLNK(oct $t->{'mode'})) {
4601                        my $link_target = git_get_link_target($t->{'hash'});
4602                        if ($link_target) {
4603                                my $norm_target = normalize_link_target($link_target, $basedir);
4604                                if (defined $norm_target) {
4605                                        print " -> " .
4606                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4607                                                                     file_name=>$norm_target),
4608                                                       -title => $norm_target}, esc_path($link_target));
4609                                } else {
4610                                        print " -> " . esc_path($link_target);
4611                                }
4612                        }
4613                }
4614                print "</td>\n";
4615                print "<td class=\"link\">";
4616                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4617                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4618                              "blob");
4619                if ($have_blame) {
4620                        print " | " .
4621                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4622                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4623                                      "blame");
4624                }
4625                if (defined $hash_base) {
4626                        print " | " .
4627                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4628                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4629                                      "history");
4630                }
4631                print " | " .
4632                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4633                                               file_name=>"$basedir$t->{'name'}")},
4634                                "raw");
4635                print "</td>\n";
4636
4637        } elsif ($t->{'type'} eq "tree") {
4638                print "<td class=\"list\">";
4639                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4640                                             file_name=>"$basedir$t->{'name'}",
4641                                             %base_key)},
4642                              esc_path($t->{'name'}));
4643                print "</td>\n";
4644                print "<td class=\"link\">";
4645                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4646                                             file_name=>"$basedir$t->{'name'}",
4647                                             %base_key)},
4648                              "tree");
4649                if (defined $hash_base) {
4650                        print " | " .
4651                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4652                                                     file_name=>"$basedir$t->{'name'}")},
4653                                      "history");
4654                }
4655                print "</td>\n";
4656        } else {
4657                # unknown object: we can only present history for it
4658                # (this includes 'commit' object, i.e. submodule support)
4659                print "<td class=\"list\">" .
4660                      esc_path($t->{'name'}) .
4661                      "</td>\n";
4662                print "<td class=\"link\">";
4663                if (defined $hash_base) {
4664                        print $cgi->a({-href => href(action=>"history",
4665                                                     hash_base=>$hash_base,
4666                                                     file_name=>"$basedir$t->{'name'}")},
4667                                      "history");
4668                }
4669                print "</td>\n";
4670        }
4671}
4672
4673## ......................................................................
4674## functions printing large fragments of HTML
4675
4676# get pre-image filenames for merge (combined) diff
4677sub fill_from_file_info {
4678        my ($diff, @parents) = @_;
4679
4680        $diff->{'from_file'} = [ ];
4681        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4682        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4683                if ($diff->{'status'}[$i] eq 'R' ||
4684                    $diff->{'status'}[$i] eq 'C') {
4685                        $diff->{'from_file'}[$i] =
4686                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4687                }
4688        }
4689
4690        return $diff;
4691}
4692
4693# is current raw difftree line of file deletion
4694sub is_deleted {
4695        my $diffinfo = shift;
4696
4697        return $diffinfo->{'to_id'} eq ('0' x 40);
4698}
4699
4700# does patch correspond to [previous] difftree raw line
4701# $diffinfo  - hashref of parsed raw diff format
4702# $patchinfo - hashref of parsed patch diff format
4703#              (the same keys as in $diffinfo)
4704sub is_patch_split {
4705        my ($diffinfo, $patchinfo) = @_;
4706
4707        return defined $diffinfo && defined $patchinfo
4708                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4709}
4710
4711
4712sub git_difftree_body {
4713        my ($difftree, $hash, @parents) = @_;
4714        my ($parent) = $parents[0];
4715        my $have_blame = gitweb_check_feature('blame');
4716        print "<div class=\"list_head\">\n";
4717        if ($#{$difftree} > 10) {
4718                print(($#{$difftree} + 1) . " files changed:\n");
4719        }
4720        print "</div>\n";
4721
4722        print "<table class=\"" .
4723              (@parents > 1 ? "combined " : "") .
4724              "diff_tree\">\n";
4725
4726        # header only for combined diff in 'commitdiff' view
4727        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4728        if ($has_header) {
4729                # table header
4730                print "<thead><tr>\n" .
4731                       "<th></th><th></th>\n"; # filename, patchN link
4732                for (my $i = 0; $i < @parents; $i++) {
4733                        my $par = $parents[$i];
4734                        print "<th>" .
4735                              $cgi->a({-href => href(action=>"commitdiff",
4736                                                     hash=>$hash, hash_parent=>$par),
4737                                       -title => 'commitdiff to parent number ' .
4738                                                  ($i+1) . ': ' . substr($par,0,7)},
4739                                      $i+1) .
4740                              "&nbsp;</th>\n";
4741                }
4742                print "</tr></thead>\n<tbody>\n";
4743        }
4744
4745        my $alternate = 1;
4746        my $patchno = 0;
4747        foreach my $line (@{$difftree}) {
4748                my $diff = parsed_difftree_line($line);
4749
4750                if ($alternate) {
4751                        print "<tr class=\"dark\">\n";
4752                } else {
4753                        print "<tr class=\"light\">\n";
4754                }
4755                $alternate ^= 1;
4756
4757                if (exists $diff->{'nparents'}) { # combined diff
4758
4759                        fill_from_file_info($diff, @parents)
4760                                unless exists $diff->{'from_file'};
4761
4762                        if (!is_deleted($diff)) {
4763                                # file exists in the result (child) commit
4764                                print "<td>" .
4765                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4766                                                             file_name=>$diff->{'to_file'},
4767                                                             hash_base=>$hash),
4768                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4769                                      "</td>\n";
4770                        } else {
4771                                print "<td>" .
4772                                      esc_path($diff->{'to_file'}) .
4773                                      "</td>\n";
4774                        }
4775
4776                        if ($action eq 'commitdiff') {
4777                                # link to patch
4778                                $patchno++;
4779                                print "<td class=\"link\">" .
4780                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4781                                              "patch") .
4782                                      " | " .
4783                                      "</td>\n";
4784                        }
4785
4786                        my $has_history = 0;
4787                        my $not_deleted = 0;
4788                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4789                                my $hash_parent = $parents[$i];
4790                                my $from_hash = $diff->{'from_id'}[$i];
4791                                my $from_path = $diff->{'from_file'}[$i];
4792                                my $status = $diff->{'status'}[$i];
4793
4794                                $has_history ||= ($status ne 'A');
4795                                $not_deleted ||= ($status ne 'D');
4796
4797                                if ($status eq 'A') {
4798                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4799                                } elsif ($status eq 'D') {
4800                                        print "<td class=\"link\">" .
4801                                              $cgi->a({-href => href(action=>"blob",
4802                                                                     hash_base=>$hash,
4803                                                                     hash=>$from_hash,
4804                                                                     file_name=>$from_path)},
4805                                                      "blob" . ($i+1)) .
4806                                              " | </td>\n";
4807                                } else {
4808                                        if ($diff->{'to_id'} eq $from_hash) {
4809                                                print "<td class=\"link nochange\">";
4810                                        } else {
4811                                                print "<td class=\"link\">";
4812                                        }
4813                                        print $cgi->a({-href => href(action=>"blobdiff",
4814                                                                     hash=>$diff->{'to_id'},
4815                                                                     hash_parent=>$from_hash,
4816                                                                     hash_base=>$hash,
4817                                                                     hash_parent_base=>$hash_parent,
4818                                                                     file_name=>$diff->{'to_file'},
4819                                                                     file_parent=>$from_path)},
4820                                                      "diff" . ($i+1)) .
4821                                              " | </td>\n";
4822                                }
4823                        }
4824
4825                        print "<td class=\"link\">";
4826                        if ($not_deleted) {
4827                                print $cgi->a({-href => href(action=>"blob",
4828                                                             hash=>$diff->{'to_id'},
4829                                                             file_name=>$diff->{'to_file'},
4830                                                             hash_base=>$hash)},
4831                                              "blob");
4832                                print " | " if ($has_history);
4833                        }
4834                        if ($has_history) {
4835                                print $cgi->a({-href => href(action=>"history",
4836                                                             file_name=>$diff->{'to_file'},
4837                                                             hash_base=>$hash)},
4838                                              "history");
4839                        }
4840                        print "</td>\n";
4841
4842                        print "</tr>\n";
4843                        next; # instead of 'else' clause, to avoid extra indent
4844                }
4845                # else ordinary diff
4846
4847                my ($to_mode_oct, $to_mode_str, $to_file_type);
4848                my ($from_mode_oct, $from_mode_str, $from_file_type);
4849                if ($diff->{'to_mode'} ne ('0' x 6)) {
4850                        $to_mode_oct = oct $diff->{'to_mode'};
4851                        if (S_ISREG($to_mode_oct)) { # only for regular file
4852                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4853                        }
4854                        $to_file_type = file_type($diff->{'to_mode'});
4855                }
4856                if ($diff->{'from_mode'} ne ('0' x 6)) {
4857                        $from_mode_oct = oct $diff->{'from_mode'};
4858                        if (S_ISREG($from_mode_oct)) { # only for regular file
4859                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4860                        }
4861                        $from_file_type = file_type($diff->{'from_mode'});
4862                }
4863
4864                if ($diff->{'status'} eq "A") { # created
4865                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4866                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4867                        $mode_chng   .= "]</span>";
4868                        print "<td>";
4869                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4870                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4871                                      -class => "list"}, esc_path($diff->{'file'}));
4872                        print "</td>\n";
4873                        print "<td>$mode_chng</td>\n";
4874                        print "<td class=\"link\">";
4875                        if ($action eq 'commitdiff') {
4876                                # link to patch
4877                                $patchno++;
4878                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4879                                              "patch") .
4880                                      " | ";
4881                        }
4882                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4883                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4884                                      "blob");
4885                        print "</td>\n";
4886
4887                } elsif ($diff->{'status'} eq "D") { # deleted
4888                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4889                        print "<td>";
4890                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4891                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4892                                       -class => "list"}, esc_path($diff->{'file'}));
4893                        print "</td>\n";
4894                        print "<td>$mode_chng</td>\n";
4895                        print "<td class=\"link\">";
4896                        if ($action eq 'commitdiff') {
4897                                # link to patch
4898                                $patchno++;
4899                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4900                                              "patch") .
4901                                      " | ";
4902                        }
4903                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4904                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4905                                      "blob") . " | ";
4906                        if ($have_blame) {
4907                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4908                                                             file_name=>$diff->{'file'})},
4909                                              "blame") . " | ";
4910                        }
4911                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4912                                                     file_name=>$diff->{'file'})},
4913                                      "history");
4914                        print "</td>\n";
4915
4916                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4917                        my $mode_chnge = "";
4918                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4919                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4920                                if ($from_file_type ne $to_file_type) {
4921                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4922                                }
4923                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4924                                        if ($from_mode_str && $to_mode_str) {
4925                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4926                                        } elsif ($to_mode_str) {
4927                                                $mode_chnge .= " mode: $to_mode_str";
4928                                        }
4929                                }
4930                                $mode_chnge .= "]</span>\n";
4931                        }
4932                        print "<td>";
4933                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4934                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4935                                      -class => "list"}, esc_path($diff->{'file'}));
4936                        print "</td>\n";
4937                        print "<td>$mode_chnge</td>\n";
4938                        print "<td class=\"link\">";
4939                        if ($action eq 'commitdiff') {
4940                                # link to patch
4941                                $patchno++;
4942                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4943                                              "patch") .
4944                                      " | ";
4945                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4946                                # "commit" view and modified file (not onlu mode changed)
4947                                print $cgi->a({-href => href(action=>"blobdiff",
4948                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4949                                                             hash_base=>$hash, hash_parent_base=>$parent,
4950                                                             file_name=>$diff->{'file'})},
4951                                              "diff") .
4952                                      " | ";
4953                        }
4954                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4955                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4956                                       "blob") . " | ";
4957                        if ($have_blame) {
4958                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4959                                                             file_name=>$diff->{'file'})},
4960                                              "blame") . " | ";
4961                        }
4962                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4963                                                     file_name=>$diff->{'file'})},
4964                                      "history");
4965                        print "</td>\n";
4966
4967                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4968                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4969                        my $nstatus = $status_name{$diff->{'status'}};
4970                        my $mode_chng = "";
4971                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4972                                # mode also for directories, so we cannot use $to_mode_str
4973                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4974                        }
4975                        print "<td>" .
4976                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4977                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4978                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4979                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4980                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4981                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4982                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4983                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4984                              "<td class=\"link\">";
4985                        if ($action eq 'commitdiff') {
4986                                # link to patch
4987                                $patchno++;
4988                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4989                                              "patch") .
4990                                      " | ";
4991                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4992                                # "commit" view and modified file (not only pure rename or copy)
4993                                print $cgi->a({-href => href(action=>"blobdiff",
4994                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4995                                                             hash_base=>$hash, hash_parent_base=>$parent,
4996                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4997                                              "diff") .
4998                                      " | ";
4999                        }
5000                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5001                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5002                                      "blob") . " | ";
5003                        if ($have_blame) {
5004                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5005                                                             file_name=>$diff->{'to_file'})},
5006                                              "blame") . " | ";
5007                        }
5008                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5009                                                    file_name=>$diff->{'to_file'})},
5010                                      "history");
5011                        print "</td>\n";
5012
5013                } # we should not encounter Unmerged (U) or Unknown (X) status
5014                print "</tr>\n";
5015        }
5016        print "</tbody>" if $has_header;
5017        print "</table>\n";
5018}
5019
5020# Print context lines and then rem/add lines in a side-by-side manner.
5021sub print_sidebyside_diff_lines {
5022        my ($ctx, $rem, $add) = @_;
5023
5024        # print context block before add/rem block
5025        if (@$ctx) {
5026                print join '',
5027                        '<div class="chunk_block ctx">',
5028                                '<div class="old">',
5029                                @$ctx,
5030                                '</div>',
5031                                '<div class="new">',
5032                                @$ctx,
5033                                '</div>',
5034                        '</div>';
5035        }
5036
5037        if (!@$add) {
5038                # pure removal
5039                print join '',
5040                        '<div class="chunk_block rem">',
5041                                '<div class="old">',
5042                                @$rem,
5043                                '</div>',
5044                        '</div>';
5045        } elsif (!@$rem) {
5046                # pure addition
5047                print join '',
5048                        '<div class="chunk_block add">',
5049                                '<div class="new">',
5050                                @$add,
5051                                '</div>',
5052                        '</div>';
5053        } else {
5054                print join '',
5055                        '<div class="chunk_block chg">',
5056                                '<div class="old">',
5057                                @$rem,
5058                                '</div>',
5059                                '<div class="new">',
5060                                @$add,
5061                                '</div>',
5062                        '</div>';
5063        }
5064}
5065
5066# Print context lines and then rem/add lines in inline manner.
5067sub print_inline_diff_lines {
5068        my ($ctx, $rem, $add) = @_;
5069
5070        print @$ctx, @$rem, @$add;
5071}
5072
5073# Format removed and added line, mark changed part and HTML-format them.
5074# Implementation is based on contrib/diff-highlight
5075sub format_rem_add_lines_pair {
5076        my ($rem, $add, $num_parents) = @_;
5077
5078        # We need to untabify lines before split()'ing them;
5079        # otherwise offsets would be invalid.
5080        chomp $rem;
5081        chomp $add;
5082        $rem = untabify($rem);
5083        $add = untabify($add);
5084
5085        my @rem = split(//, $rem);
5086        my @add = split(//, $add);
5087        my ($esc_rem, $esc_add);
5088        # Ignore leading +/- characters for each parent.
5089        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5090        my ($prefix_has_nonspace, $suffix_has_nonspace);
5091
5092        my $shorter = (@rem < @add) ? @rem : @add;
5093        while ($prefix_len < $shorter) {
5094                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5095
5096                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5097                $prefix_len++;
5098        }
5099
5100        while ($prefix_len + $suffix_len < $shorter) {
5101                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5102
5103                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5104                $suffix_len++;
5105        }
5106
5107        # Mark lines that are different from each other, but have some common
5108        # part that isn't whitespace.  If lines are completely different, don't
5109        # mark them because that would make output unreadable, especially if
5110        # diff consists of multiple lines.
5111        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5112                $esc_rem = esc_html_hl_regions($rem, 'marked',
5113                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5114                $esc_add = esc_html_hl_regions($add, 'marked',
5115                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5116        } else {
5117                $esc_rem = esc_html($rem, -nbsp=>1);
5118                $esc_add = esc_html($add, -nbsp=>1);
5119        }
5120
5121        return format_diff_line(\$esc_rem, 'rem'),
5122               format_diff_line(\$esc_add, 'add');
5123}
5124
5125# HTML-format diff context, removed and added lines.
5126sub format_ctx_rem_add_lines {
5127        my ($ctx, $rem, $add, $num_parents) = @_;
5128        my (@new_ctx, @new_rem, @new_add);
5129        my $can_highlight = 0;
5130        my $is_combined = ($num_parents > 1);
5131
5132        # Highlight if every removed line has a corresponding added line.
5133        if (@$add > 0 && @$add == @$rem) {
5134                $can_highlight = 1;
5135
5136                # Highlight lines in combined diff only if the chunk contains
5137                # diff between the same version, e.g.
5138                #
5139                #    - a
5140                #   -  b
5141                #    + c
5142                #   +  d
5143                #
5144                # Otherwise the highlightling would be confusing.
5145                if ($is_combined) {
5146                        for (my $i = 0; $i < @$add; $i++) {
5147                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5148                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5149
5150                                $prefix_rem =~ s/-/+/g;
5151
5152                                if ($prefix_rem ne $prefix_add) {
5153                                        $can_highlight = 0;
5154                                        last;
5155                                }
5156                        }
5157                }
5158        }
5159
5160        if ($can_highlight) {
5161                for (my $i = 0; $i < @$add; $i++) {
5162                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5163                                $rem->[$i], $add->[$i], $num_parents);
5164                        push @new_rem, $line_rem;
5165                        push @new_add, $line_add;
5166                }
5167        } else {
5168                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5169                @new_add = map { format_diff_line($_, 'add') } @$add;
5170        }
5171
5172        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5173
5174        return (\@new_ctx, \@new_rem, \@new_add);
5175}
5176
5177# Print context lines and then rem/add lines.
5178sub print_diff_lines {
5179        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5180        my $is_combined = $num_parents > 1;
5181
5182        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5183                $num_parents);
5184
5185        if ($diff_style eq 'sidebyside' && !$is_combined) {
5186                print_sidebyside_diff_lines($ctx, $rem, $add);
5187        } else {
5188                # default 'inline' style and unknown styles
5189                print_inline_diff_lines($ctx, $rem, $add);
5190        }
5191}
5192
5193sub print_diff_chunk {
5194        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5195        my (@ctx, @rem, @add);
5196
5197        # The class of the previous line.
5198        my $prev_class = '';
5199
5200        return unless @chunk;
5201
5202        # incomplete last line might be among removed or added lines,
5203        # or both, or among context lines: find which
5204        for (my $i = 1; $i < @chunk; $i++) {
5205                if ($chunk[$i][0] eq 'incomplete') {
5206                        $chunk[$i][0] = $chunk[$i-1][0];
5207                }
5208        }
5209
5210        # guardian
5211        push @chunk, ["", ""];
5212
5213        foreach my $line_info (@chunk) {
5214                my ($class, $line) = @$line_info;
5215
5216                # print chunk headers
5217                if ($class && $class eq 'chunk_header') {
5218                        print format_diff_line($line, $class, $from, $to);
5219                        next;
5220                }
5221
5222                ## print from accumulator when have some add/rem lines or end
5223                # of chunk (flush context lines), or when have add and rem
5224                # lines and new block is reached (otherwise add/rem lines could
5225                # be reordered)
5226                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5227                    (@rem && @add && $class ne $prev_class)) {
5228                        print_diff_lines(\@ctx, \@rem, \@add,
5229                                         $diff_style, $num_parents);
5230                        @ctx = @rem = @add = ();
5231                }
5232
5233                ## adding lines to accumulator
5234                # guardian value
5235                last unless $line;
5236                # rem, add or change
5237                if ($class eq 'rem') {
5238                        push @rem, $line;
5239                } elsif ($class eq 'add') {
5240                        push @add, $line;
5241                }
5242                # context line
5243                if ($class eq 'ctx') {
5244                        push @ctx, $line;
5245                }
5246
5247                $prev_class = $class;
5248        }
5249}
5250
5251sub git_patchset_body {
5252        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5253        my ($hash_parent) = $hash_parents[0];
5254
5255        my $is_combined = (@hash_parents > 1);
5256        my $patch_idx = 0;
5257        my $patch_number = 0;
5258        my $patch_line;
5259        my $diffinfo;
5260        my $to_name;
5261        my (%from, %to);
5262        my @chunk; # for side-by-side diff
5263
5264        print "<div class=\"patchset\">\n";
5265
5266        # skip to first patch
5267        while ($patch_line = <$fd>) {
5268                chomp $patch_line;
5269
5270                last if ($patch_line =~ m/^diff /);
5271        }
5272
5273 PATCH:
5274        while ($patch_line) {
5275
5276                # parse "git diff" header line
5277                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5278                        # $1 is from_name, which we do not use
5279                        $to_name = unquote($2);
5280                        $to_name =~ s!^b/!!;
5281                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5282                        # $1 is 'cc' or 'combined', which we do not use
5283                        $to_name = unquote($2);
5284                } else {
5285                        $to_name = undef;
5286                }
5287
5288                # check if current patch belong to current raw line
5289                # and parse raw git-diff line if needed
5290                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5291                        # this is continuation of a split patch
5292                        print "<div class=\"patch cont\">\n";
5293                } else {
5294                        # advance raw git-diff output if needed
5295                        $patch_idx++ if defined $diffinfo;
5296
5297                        # read and prepare patch information
5298                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5299
5300                        # compact combined diff output can have some patches skipped
5301                        # find which patch (using pathname of result) we are at now;
5302                        if ($is_combined) {
5303                                while ($to_name ne $diffinfo->{'to_file'}) {
5304                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5305                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5306                                              "</div>\n";  # class="patch"
5307
5308                                        $patch_idx++;
5309                                        $patch_number++;
5310
5311                                        last if $patch_idx > $#$difftree;
5312                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5313                                }
5314                        }
5315
5316                        # modifies %from, %to hashes
5317                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5318
5319                        # this is first patch for raw difftree line with $patch_idx index
5320                        # we index @$difftree array from 0, but number patches from 1
5321                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5322                }
5323
5324                # git diff header
5325                #assert($patch_line =~ m/^diff /) if DEBUG;
5326                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5327                $patch_number++;
5328                # print "git diff" header
5329                print format_git_diff_header_line($patch_line, $diffinfo,
5330                                                  \%from, \%to);
5331
5332                # print extended diff header
5333                print "<div class=\"diff extended_header\">\n";
5334        EXTENDED_HEADER:
5335                while ($patch_line = <$fd>) {
5336                        chomp $patch_line;
5337
5338                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5339
5340                        print format_extended_diff_header_line($patch_line, $diffinfo,
5341                                                               \%from, \%to);
5342                }
5343                print "</div>\n"; # class="diff extended_header"
5344
5345                # from-file/to-file diff header
5346                if (! $patch_line) {
5347                        print "</div>\n"; # class="patch"
5348                        last PATCH;
5349                }
5350                next PATCH if ($patch_line =~ m/^diff /);
5351                #assert($patch_line =~ m/^---/) if DEBUG;
5352
5353                my $last_patch_line = $patch_line;
5354                $patch_line = <$fd>;
5355                chomp $patch_line;
5356                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5357
5358                print format_diff_from_to_header($last_patch_line, $patch_line,
5359                                                 $diffinfo, \%from, \%to,
5360                                                 @hash_parents);
5361
5362                # the patch itself
5363        LINE:
5364                while ($patch_line = <$fd>) {
5365                        chomp $patch_line;
5366
5367                        next PATCH if ($patch_line =~ m/^diff /);
5368
5369                        my $class = diff_line_class($patch_line, \%from, \%to);
5370
5371                        if ($class eq 'chunk_header') {
5372                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5373                                @chunk = ();
5374                        }
5375
5376                        push @chunk, [ $class, $patch_line ];
5377                }
5378
5379        } continue {
5380                if (@chunk) {
5381                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5382                        @chunk = ();
5383                }
5384                print "</div>\n"; # class="patch"
5385        }
5386
5387        # for compact combined (--cc) format, with chunk and patch simplification
5388        # the patchset might be empty, but there might be unprocessed raw lines
5389        for (++$patch_idx if $patch_number > 0;
5390             $patch_idx < @$difftree;
5391             ++$patch_idx) {
5392                # read and prepare patch information
5393                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5394
5395                # generate anchor for "patch" links in difftree / whatchanged part
5396                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5397                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5398                      "</div>\n";  # class="patch"
5399
5400                $patch_number++;
5401        }
5402
5403        if ($patch_number == 0) {
5404                if (@hash_parents > 1) {
5405                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5406                } else {
5407                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5408                }
5409        }
5410
5411        print "</div>\n"; # class="patchset"
5412}
5413
5414# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5415
5416sub git_project_search_form {
5417        my ($searchtext, $search_use_regexp) = @_;
5418
5419        my $limit = '';
5420        if ($project_filter) {
5421                $limit = " in '$project_filter/'";
5422        }
5423
5424        print "<div class=\"projsearch\">\n";
5425        print $cgi->startform(-method => 'get', -action => $my_uri) .
5426              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5427        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5428                if (defined $project_filter);
5429        print $cgi->textfield(-name => 's', -value => $searchtext,
5430                              -title => "Search project by name and description$limit",
5431                              -size => 60) . "\n" .
5432              "<span title=\"Extended regular expression\">" .
5433              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5434                             -checked => $search_use_regexp) .
5435              "</span>\n" .
5436              $cgi->submit(-name => 'btnS', -value => 'Search') .
5437              $cgi->end_form() . "\n" .
5438              $cgi->a({-href => href(project => undef, searchtext => undef,
5439                                     project_filter => $project_filter)},
5440                      esc_html("List all projects$limit")) . "<br />\n";
5441        print "</div>\n";
5442}
5443
5444# entry for given @keys needs filling if at least one of keys in list
5445# is not present in %$project_info
5446sub project_info_needs_filling {
5447        my ($project_info, @keys) = @_;
5448
5449        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5450        foreach my $key (@keys) {
5451                if (!exists $project_info->{$key}) {
5452                        return 1;
5453                }
5454        }
5455        return;
5456}
5457
5458# fills project list info (age, description, owner, category, forks, etc.)
5459# for each project in the list, removing invalid projects from
5460# returned list, or fill only specified info.
5461#
5462# Invalid projects are removed from the returned list if and only if you
5463# ask 'age' or 'age_string' to be filled, because they are the only fields
5464# that run unconditionally git command that requires repository, and
5465# therefore do always check if project repository is invalid.
5466#
5467# USAGE:
5468# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5469#   ensures that 'descr_long' and 'ctags' fields are filled
5470# * @project_list = fill_project_list_info(\@project_list)
5471#   ensures that all fields are filled (and invalid projects removed)
5472#
5473# NOTE: modifies $projlist, but does not remove entries from it
5474sub fill_project_list_info {
5475        my ($projlist, @wanted_keys) = @_;
5476        my @projects;
5477        my $filter_set = sub { return @_; };
5478        if (@wanted_keys) {
5479                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5480                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5481        }
5482
5483        my $show_ctags = gitweb_check_feature('ctags');
5484 PROJECT:
5485        foreach my $pr (@$projlist) {
5486                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5487                        my (@activity) = git_get_last_activity($pr->{'path'});
5488                        unless (@activity) {
5489                                next PROJECT;
5490                        }
5491                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5492                }
5493                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5494                        my $descr = git_get_project_description($pr->{'path'}) || "";
5495                        $descr = to_utf8($descr);
5496                        $pr->{'descr_long'} = $descr;
5497                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5498                }
5499                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5500                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5501                }
5502                if ($show_ctags &&
5503                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5504                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5505                }
5506                if ($projects_list_group_categories &&
5507                    project_info_needs_filling($pr, $filter_set->('category'))) {
5508                        my $cat = git_get_project_category($pr->{'path'}) ||
5509                                                           $project_list_default_category;
5510                        $pr->{'category'} = to_utf8($cat);
5511                }
5512
5513                push @projects, $pr;
5514        }
5515
5516        return @projects;
5517}
5518
5519sub sort_projects_list {
5520        my ($projlist, $order) = @_;
5521        my @projects;
5522
5523        my %order_info = (
5524                project => { key => 'path', type => 'str' },
5525                descr => { key => 'descr_long', type => 'str' },
5526                owner => { key => 'owner', type => 'str' },
5527                age => { key => 'age', type => 'num' }
5528        );
5529        my $oi = $order_info{$order};
5530        return @$projlist unless defined $oi;
5531        if ($oi->{'type'} eq 'str') {
5532                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5533        } else {
5534                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5535        }
5536
5537        return @projects;
5538}
5539
5540# returns a hash of categories, containing the list of project
5541# belonging to each category
5542sub build_projlist_by_category {
5543        my ($projlist, $from, $to) = @_;
5544        my %categories;
5545
5546        $from = 0 unless defined $from;
5547        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5548
5549        for (my $i = $from; $i <= $to; $i++) {
5550                my $pr = $projlist->[$i];
5551                push @{$categories{ $pr->{'category'} }}, $pr;
5552        }
5553
5554        return wantarray ? %categories : \%categories;
5555}
5556
5557# print 'sort by' <th> element, generating 'sort by $name' replay link
5558# if that order is not selected
5559sub print_sort_th {
5560        print format_sort_th(@_);
5561}
5562
5563sub format_sort_th {
5564        my ($name, $order, $header) = @_;
5565        my $sort_th = "";
5566        $header ||= ucfirst($name);
5567
5568        if ($order eq $name) {
5569                $sort_th .= "<th>$header</th>\n";
5570        } else {
5571                $sort_th .= "<th>" .
5572                            $cgi->a({-href => href(-replay=>1, order=>$name),
5573                                     -class => "header"}, $header) .
5574                            "</th>\n";
5575        }
5576
5577        return $sort_th;
5578}
5579
5580sub git_project_list_rows {
5581        my ($projlist, $from, $to, $check_forks) = @_;
5582
5583        $from = 0 unless defined $from;
5584        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5585
5586        my $alternate = 1;
5587        for (my $i = $from; $i <= $to; $i++) {
5588                my $pr = $projlist->[$i];
5589
5590                if ($alternate) {
5591                        print "<tr class=\"dark\">\n";
5592                } else {
5593                        print "<tr class=\"light\">\n";
5594                }
5595                $alternate ^= 1;
5596
5597                if ($check_forks) {
5598                        print "<td>";
5599                        if ($pr->{'forks'}) {
5600                                my $nforks = scalar @{$pr->{'forks'}};
5601                                if ($nforks > 0) {
5602                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5603                                                       -title => "$nforks forks"}, "+");
5604                                } else {
5605                                        print $cgi->span({-title => "$nforks forks"}, "+");
5606                                }
5607                        }
5608                        print "</td>\n";
5609                }
5610                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5611                                        -class => "list"},
5612                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5613                      "</td>\n" .
5614                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5615                                        -class => "list",
5616                                        -title => $pr->{'descr_long'}},
5617                                        $search_regexp
5618                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5619                                                                    $pr->{'descr'}, $search_regexp)
5620                                        : esc_html($pr->{'descr'})) .
5621                      "</td>\n";
5622                unless ($omit_owner) {
5623                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5624                }
5625                unless ($omit_age_column) {
5626                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5627                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5628                }
5629                print"<td class=\"link\">" .
5630                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5631                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5632                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5633                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5634                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5635                      "</td>\n" .
5636                      "</tr>\n";
5637        }
5638}
5639
5640sub git_project_list_body {
5641        # actually uses global variable $project
5642        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5643        my @projects = @$projlist;
5644
5645        my $check_forks = gitweb_check_feature('forks');
5646        my $show_ctags  = gitweb_check_feature('ctags');
5647        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5648        $check_forks = undef
5649                if ($tagfilter || $search_regexp);
5650
5651        # filtering out forks before filling info allows to do less work
5652        @projects = filter_forks_from_projects_list(\@projects)
5653                if ($check_forks);
5654        # search_projects_list pre-fills required info
5655        @projects = search_projects_list(\@projects,
5656                                         'search_regexp' => $search_regexp,
5657                                         'tagfilter'  => $tagfilter)
5658                if ($tagfilter || $search_regexp);
5659        # fill the rest
5660        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5661        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5662        push @all_fields, 'owner' unless($omit_owner);
5663        @projects = fill_project_list_info(\@projects, @all_fields);
5664
5665        $order ||= $default_projects_order;
5666        $from = 0 unless defined $from;
5667        $to = $#projects if (!defined $to || $#projects < $to);
5668
5669        # short circuit
5670        if ($from > $to) {
5671                print "<center>\n".
5672                      "<b>No such projects found</b><br />\n".
5673                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5674                      "</center>\n<br />\n";
5675                return;
5676        }
5677
5678        @projects = sort_projects_list(\@projects, $order);
5679
5680        if ($show_ctags) {
5681                my $ctags = git_gather_all_ctags(\@projects);
5682                my $cloud = git_populate_project_tagcloud($ctags);
5683                print git_show_project_tagcloud($cloud, 64);
5684        }
5685
5686        print "<table class=\"project_list\">\n";
5687        unless ($no_header) {
5688                print "<tr>\n";
5689                if ($check_forks) {
5690                        print "<th></th>\n";
5691                }
5692                print_sort_th('project', $order, 'Project');
5693                print_sort_th('descr', $order, 'Description');
5694                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5695                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5696                print "<th></th>\n" . # for links
5697                      "</tr>\n";
5698        }
5699
5700        if ($projects_list_group_categories) {
5701                # only display categories with projects in the $from-$to window
5702                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5703                my %categories = build_projlist_by_category(\@projects, $from, $to);
5704                foreach my $cat (sort keys %categories) {
5705                        unless ($cat eq "") {
5706                                print "<tr>\n";
5707                                if ($check_forks) {
5708                                        print "<td></td>\n";
5709                                }
5710                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5711                                print "</tr>\n";
5712                        }
5713
5714                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5715                }
5716        } else {
5717                git_project_list_rows(\@projects, $from, $to, $check_forks);
5718        }
5719
5720        if (defined $extra) {
5721                print "<tr>\n";
5722                if ($check_forks) {
5723                        print "<td></td>\n";
5724                }
5725                print "<td colspan=\"5\">$extra</td>\n" .
5726                      "</tr>\n";
5727        }
5728        print "</table>\n";
5729}
5730
5731sub git_log_body {
5732        # uses global variable $project
5733        my ($commitlist, $from, $to, $refs, $extra) = @_;
5734
5735        $from = 0 unless defined $from;
5736        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5737
5738        for (my $i = 0; $i <= $to; $i++) {
5739                my %co = %{$commitlist->[$i]};
5740                next if !%co;
5741                my $commit = $co{'id'};
5742                my $ref = format_ref_marker($refs, $commit);
5743                git_print_header_div('commit',
5744                               "<span class=\"age\">$co{'age_string'}</span>" .
5745                               esc_html($co{'title'}) . $ref,
5746                               $commit);
5747                print "<div class=\"title_text\">\n" .
5748                      "<div class=\"log_link\">\n" .
5749                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5750                      " | " .
5751                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5752                      " | " .
5753                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5754                      "<br/>\n" .
5755                      "</div>\n";
5756                      git_print_authorship(\%co, -tag => 'span');
5757                      print "<br/>\n</div>\n";
5758
5759                print "<div class=\"log_body\">\n";
5760                git_print_log($co{'comment'}, -final_empty_line=> 1);
5761                print "</div>\n";
5762        }
5763        if ($extra) {
5764                print "<div class=\"page_nav\">\n";
5765                print "$extra\n";
5766                print "</div>\n";
5767        }
5768}
5769
5770sub git_shortlog_body {
5771        # uses global variable $project
5772        my ($commitlist, $from, $to, $refs, $extra) = @_;
5773
5774        $from = 0 unless defined $from;
5775        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5776
5777        print "<table class=\"shortlog\">\n";
5778        my $alternate = 1;
5779        for (my $i = $from; $i <= $to; $i++) {
5780                my %co = %{$commitlist->[$i]};
5781                my $commit = $co{'id'};
5782                my $ref = format_ref_marker($refs, $commit);
5783                if ($alternate) {
5784                        print "<tr class=\"dark\">\n";
5785                } else {
5786                        print "<tr class=\"light\">\n";
5787                }
5788                $alternate ^= 1;
5789                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5790                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5791                      format_author_html('td', \%co, 10) . "<td>";
5792                print format_subject_html($co{'title'}, $co{'title_short'},
5793                                          href(action=>"commit", hash=>$commit), $ref);
5794                print "</td>\n" .
5795                      "<td class=\"link\">" .
5796                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5797                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5798                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5799                my $snapshot_links = format_snapshot_links($commit);
5800                if (defined $snapshot_links) {
5801                        print " | " . $snapshot_links;
5802                }
5803                print "</td>\n" .
5804                      "</tr>\n";
5805        }
5806        if (defined $extra) {
5807                print "<tr>\n" .
5808                      "<td colspan=\"4\">$extra</td>\n" .
5809                      "</tr>\n";
5810        }
5811        print "</table>\n";
5812}
5813
5814sub git_history_body {
5815        # Warning: assumes constant type (blob or tree) during history
5816        my ($commitlist, $from, $to, $refs, $extra,
5817            $file_name, $file_hash, $ftype) = @_;
5818
5819        $from = 0 unless defined $from;
5820        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5821
5822        print "<table class=\"history\">\n";
5823        my $alternate = 1;
5824        for (my $i = $from; $i <= $to; $i++) {
5825                my %co = %{$commitlist->[$i]};
5826                if (!%co) {
5827                        next;
5828                }
5829                my $commit = $co{'id'};
5830
5831                my $ref = format_ref_marker($refs, $commit);
5832
5833                if ($alternate) {
5834                        print "<tr class=\"dark\">\n";
5835                } else {
5836                        print "<tr class=\"light\">\n";
5837                }
5838                $alternate ^= 1;
5839                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5840        # shortlog:   format_author_html('td', \%co, 10)
5841                      format_author_html('td', \%co, 15, 3) . "<td>";
5842                # originally git_history used chop_str($co{'title'}, 50)
5843                print format_subject_html($co{'title'}, $co{'title_short'},
5844                                          href(action=>"commit", hash=>$commit), $ref);
5845                print "</td>\n" .
5846                      "<td class=\"link\">" .
5847                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5848                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5849
5850                if ($ftype eq 'blob') {
5851                        my $blob_current = $file_hash;
5852                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5853                        if (defined $blob_current && defined $blob_parent &&
5854                                        $blob_current ne $blob_parent) {
5855                                print " | " .
5856                                        $cgi->a({-href => href(action=>"blobdiff",
5857                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5858                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5859                                                               file_name=>$file_name)},
5860                                                "diff to current");
5861                        }
5862                }
5863                print "</td>\n" .
5864                      "</tr>\n";
5865        }
5866        if (defined $extra) {
5867                print "<tr>\n" .
5868                      "<td colspan=\"4\">$extra</td>\n" .
5869                      "</tr>\n";
5870        }
5871        print "</table>\n";
5872}
5873
5874sub git_tags_body {
5875        # uses global variable $project
5876        my ($taglist, $from, $to, $extra) = @_;
5877        $from = 0 unless defined $from;
5878        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5879
5880        print "<table class=\"tags\">\n";
5881        my $alternate = 1;
5882        for (my $i = $from; $i <= $to; $i++) {
5883                my $entry = $taglist->[$i];
5884                my %tag = %$entry;
5885                my $comment = $tag{'subject'};
5886                my $comment_short;
5887                if (defined $comment) {
5888                        $comment_short = chop_str($comment, 30, 5);
5889                }
5890                if ($alternate) {
5891                        print "<tr class=\"dark\">\n";
5892                } else {
5893                        print "<tr class=\"light\">\n";
5894                }
5895                $alternate ^= 1;
5896                if (defined $tag{'age'}) {
5897                        print "<td><i>$tag{'age'}</i></td>\n";
5898                } else {
5899                        print "<td></td>\n";
5900                }
5901                print "<td>" .
5902                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5903                               -class => "list name"}, esc_html($tag{'name'})) .
5904                      "</td>\n" .
5905                      "<td>";
5906                if (defined $comment) {
5907                        print format_subject_html($comment, $comment_short,
5908                                                  href(action=>"tag", hash=>$tag{'id'}));
5909                }
5910                print "</td>\n" .
5911                      "<td class=\"selflink\">";
5912                if ($tag{'type'} eq "tag") {
5913                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5914                } else {
5915                        print "&nbsp;";
5916                }
5917                print "</td>\n" .
5918                      "<td class=\"link\">" . " | " .
5919                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5920                if ($tag{'reftype'} eq "commit") {
5921                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5922                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5923                } elsif ($tag{'reftype'} eq "blob") {
5924                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5925                }
5926                print "</td>\n" .
5927                      "</tr>";
5928        }
5929        if (defined $extra) {
5930                print "<tr>\n" .
5931                      "<td colspan=\"5\">$extra</td>\n" .
5932                      "</tr>\n";
5933        }
5934        print "</table>\n";
5935}
5936
5937sub git_heads_body {
5938        # uses global variable $project
5939        my ($headlist, $head_at, $from, $to, $extra) = @_;
5940        $from = 0 unless defined $from;
5941        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5942
5943        print "<table class=\"heads\">\n";
5944        my $alternate = 1;
5945        for (my $i = $from; $i <= $to; $i++) {
5946                my $entry = $headlist->[$i];
5947                my %ref = %$entry;
5948                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5949                if ($alternate) {
5950                        print "<tr class=\"dark\">\n";
5951                } else {
5952                        print "<tr class=\"light\">\n";
5953                }
5954                $alternate ^= 1;
5955                print "<td><i>$ref{'age'}</i></td>\n" .
5956                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5957                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5958                               -class => "list name"},esc_html($ref{'name'})) .
5959                      "</td>\n" .
5960                      "<td class=\"link\">" .
5961                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5962                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5963                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5964                      "</td>\n" .
5965                      "</tr>";
5966        }
5967        if (defined $extra) {
5968                print "<tr>\n" .
5969                      "<td colspan=\"3\">$extra</td>\n" .
5970                      "</tr>\n";
5971        }
5972        print "</table>\n";
5973}
5974
5975# Display a single remote block
5976sub git_remote_block {
5977        my ($remote, $rdata, $limit, $head) = @_;
5978
5979        my $heads = $rdata->{'heads'};
5980        my $fetch = $rdata->{'fetch'};
5981        my $push = $rdata->{'push'};
5982
5983        my $urls_table = "<table class=\"projects_list\">\n" ;
5984
5985        if (defined $fetch) {
5986                if ($fetch eq $push) {
5987                        $urls_table .= format_repo_url("URL", $fetch);
5988                } else {
5989                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5990                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5991                }
5992        } elsif (defined $push) {
5993                $urls_table .= format_repo_url("Push URL", $push);
5994        } else {
5995                $urls_table .= format_repo_url("", "No remote URL");
5996        }
5997
5998        $urls_table .= "</table>\n";
5999
6000        my $dots;
6001        if (defined $limit && $limit < @$heads) {
6002                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6003        }
6004
6005        print $urls_table;
6006        git_heads_body($heads, $head, 0, $limit, $dots);
6007}
6008
6009# Display a list of remote names with the respective fetch and push URLs
6010sub git_remotes_list {
6011        my ($remotedata, $limit) = @_;
6012        print "<table class=\"heads\">\n";
6013        my $alternate = 1;
6014        my @remotes = sort keys %$remotedata;
6015
6016        my $limited = $limit && $limit < @remotes;
6017
6018        $#remotes = $limit - 1 if $limited;
6019
6020        while (my $remote = shift @remotes) {
6021                my $rdata = $remotedata->{$remote};
6022                my $fetch = $rdata->{'fetch'};
6023                my $push = $rdata->{'push'};
6024                if ($alternate) {
6025                        print "<tr class=\"dark\">\n";
6026                } else {
6027                        print "<tr class=\"light\">\n";
6028                }
6029                $alternate ^= 1;
6030                print "<td>" .
6031                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6032                               -class=> "list name"},esc_html($remote)) .
6033                      "</td>";
6034                print "<td class=\"link\">" .
6035                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6036                      " | " .
6037                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6038                      "</td>";
6039
6040                print "</tr>\n";
6041        }
6042
6043        if ($limited) {
6044                print "<tr>\n" .
6045                      "<td colspan=\"3\">" .
6046                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6047                      "</td>\n" . "</tr>\n";
6048        }
6049
6050        print "</table>";
6051}
6052
6053# Display remote heads grouped by remote, unless there are too many
6054# remotes, in which case we only display the remote names
6055sub git_remotes_body {
6056        my ($remotedata, $limit, $head) = @_;
6057        if ($limit and $limit < keys %$remotedata) {
6058                git_remotes_list($remotedata, $limit);
6059        } else {
6060                fill_remote_heads($remotedata);
6061                while (my ($remote, $rdata) = each %$remotedata) {
6062                        git_print_section({-class=>"remote", -id=>$remote},
6063                                ["remotes", $remote, $remote], sub {
6064                                        git_remote_block($remote, $rdata, $limit, $head);
6065                                });
6066                }
6067        }
6068}
6069
6070sub git_search_message {
6071        my %co = @_;
6072
6073        my $greptype;
6074        if ($searchtype eq 'commit') {
6075                $greptype = "--grep=";
6076        } elsif ($searchtype eq 'author') {
6077                $greptype = "--author=";
6078        } elsif ($searchtype eq 'committer') {
6079                $greptype = "--committer=";
6080        }
6081        $greptype .= $searchtext;
6082        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6083                                       $greptype, '--regexp-ignore-case',
6084                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6085
6086        my $paging_nav = '';
6087        if ($page > 0) {
6088                $paging_nav .=
6089                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6090                                "first") .
6091                        " &sdot; " .
6092                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6093                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6094        } else {
6095                $paging_nav .= "first &sdot; prev";
6096        }
6097        my $next_link = '';
6098        if ($#commitlist >= 100) {
6099                $next_link =
6100                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6101                                 -accesskey => "n", -title => "Alt-n"}, "next");
6102                $paging_nav .= " &sdot; $next_link";
6103        } else {
6104                $paging_nav .= " &sdot; next";
6105        }
6106
6107        git_header_html();
6108
6109        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6110        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6111        if ($page == 0 && !@commitlist) {
6112                print "<p>No match.</p>\n";
6113        } else {
6114                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6115        }
6116
6117        git_footer_html();
6118}
6119
6120sub git_search_changes {
6121        my %co = @_;
6122
6123        local $/ = "\n";
6124        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6125                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6126                ($search_use_regexp ? '--pickaxe-regex' : ())
6127                        or die_error(500, "Open git-log failed");
6128
6129        git_header_html();
6130
6131        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6132        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6133
6134        print "<table class=\"pickaxe search\">\n";
6135        my $alternate = 1;
6136        undef %co;
6137        my @files;
6138        while (my $line = <$fd>) {
6139                chomp $line;
6140                next unless $line;
6141
6142                my %set = parse_difftree_raw_line($line);
6143                if (defined $set{'commit'}) {
6144                        # finish previous commit
6145                        if (%co) {
6146                                print "</td>\n" .
6147                                      "<td class=\"link\">" .
6148                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6149                                              "commit") .
6150                                      " | " .
6151                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6152                                                             hash_base=>$co{'id'})},
6153                                              "tree") .
6154                                      "</td>\n" .
6155                                      "</tr>\n";
6156                        }
6157
6158                        if ($alternate) {
6159                                print "<tr class=\"dark\">\n";
6160                        } else {
6161                                print "<tr class=\"light\">\n";
6162                        }
6163                        $alternate ^= 1;
6164                        %co = parse_commit($set{'commit'});
6165                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6166                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6167                              "<td><i>$author</i></td>\n" .
6168                              "<td>" .
6169                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6170                                      -class => "list subject"},
6171                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6172                } elsif (defined $set{'to_id'}) {
6173                        next if ($set{'to_id'} =~ m/^0{40}$/);
6174
6175                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6176                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6177                                      -class => "list"},
6178                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6179                              "<br/>\n";
6180                }
6181        }
6182        close $fd;
6183
6184        # finish last commit (warning: repetition!)
6185        if (%co) {
6186                print "</td>\n" .
6187                      "<td class=\"link\">" .
6188                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6189                              "commit") .
6190                      " | " .
6191                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6192                                             hash_base=>$co{'id'})},
6193                              "tree") .
6194                      "</td>\n" .
6195                      "</tr>\n";
6196        }
6197
6198        print "</table>\n";
6199
6200        git_footer_html();
6201}
6202
6203sub git_search_files {
6204        my %co = @_;
6205
6206        local $/ = "\n";
6207        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6208                $search_use_regexp ? ('-E', '-i') : '-F',
6209                $searchtext, $co{'tree'}
6210                        or die_error(500, "Open git-grep failed");
6211
6212        git_header_html();
6213
6214        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6215        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6216
6217        print "<table class=\"grep_search\">\n";
6218        my $alternate = 1;
6219        my $matches = 0;
6220        my $lastfile = '';
6221        my $file_href;
6222        while (my $line = <$fd>) {
6223                chomp $line;
6224                my ($file, $lno, $ltext, $binary);
6225                last if ($matches++ > 1000);
6226                if ($line =~ /^Binary file (.+) matches$/) {
6227                        $file = $1;
6228                        $binary = 1;
6229                } else {
6230                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6231                        $file =~ s/^$co{'tree'}://;
6232                }
6233                if ($file ne $lastfile) {
6234                        $lastfile and print "</td></tr>\n";
6235                        if ($alternate++) {
6236                                print "<tr class=\"dark\">\n";
6237                        } else {
6238                                print "<tr class=\"light\">\n";
6239                        }
6240                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6241                                          file_name=>$file);
6242                        print "<td class=\"list\">".
6243                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6244                        print "</td><td>\n";
6245                        $lastfile = $file;
6246                }
6247                if ($binary) {
6248                        print "<div class=\"binary\">Binary file</div>\n";
6249                } else {
6250                        $ltext = untabify($ltext);
6251                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6252                                $ltext = esc_html($1, -nbsp=>1);
6253                                $ltext .= '<span class="match">';
6254                                $ltext .= esc_html($2, -nbsp=>1);
6255                                $ltext .= '</span>';
6256                                $ltext .= esc_html($3, -nbsp=>1);
6257                        } else {
6258                                $ltext = esc_html($ltext, -nbsp=>1);
6259                        }
6260                        print "<div class=\"pre\">" .
6261                                $cgi->a({-href => $file_href.'#l'.$lno,
6262                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6263                                ' ' .  $ltext . "</div>\n";
6264                }
6265        }
6266        if ($lastfile) {
6267                print "</td></tr>\n";
6268                if ($matches > 1000) {
6269                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6270                }
6271        } else {
6272                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6273        }
6274        close $fd;
6275
6276        print "</table>\n";
6277
6278        git_footer_html();
6279}
6280
6281sub git_search_grep_body {
6282        my ($commitlist, $from, $to, $extra) = @_;
6283        $from = 0 unless defined $from;
6284        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6285
6286        print "<table class=\"commit_search\">\n";
6287        my $alternate = 1;
6288        for (my $i = $from; $i <= $to; $i++) {
6289                my %co = %{$commitlist->[$i]};
6290                if (!%co) {
6291                        next;
6292                }
6293                my $commit = $co{'id'};
6294                if ($alternate) {
6295                        print "<tr class=\"dark\">\n";
6296                } else {
6297                        print "<tr class=\"light\">\n";
6298                }
6299                $alternate ^= 1;
6300                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6301                      format_author_html('td', \%co, 15, 5) .
6302                      "<td>" .
6303                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6304                               -class => "list subject"},
6305                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6306                my $comment = $co{'comment'};
6307                foreach my $line (@$comment) {
6308                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6309                                my ($lead, $match, $trail) = ($1, $2, $3);
6310                                $match = chop_str($match, 70, 5, 'center');
6311                                my $contextlen = int((80 - length($match))/2);
6312                                $contextlen = 30 if ($contextlen > 30);
6313                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6314                                $trail = chop_str($trail, $contextlen, 10, 'right');
6315
6316                                $lead  = esc_html($lead);
6317                                $match = esc_html($match);
6318                                $trail = esc_html($trail);
6319
6320                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6321                        }
6322                }
6323                print "</td>\n" .
6324                      "<td class=\"link\">" .
6325                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6326                      " | " .
6327                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6328                      " | " .
6329                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6330                print "</td>\n" .
6331                      "</tr>\n";
6332        }
6333        if (defined $extra) {
6334                print "<tr>\n" .
6335                      "<td colspan=\"3\">$extra</td>\n" .
6336                      "</tr>\n";
6337        }
6338        print "</table>\n";
6339}
6340
6341## ======================================================================
6342## ======================================================================
6343## actions
6344
6345sub git_project_list {
6346        my $order = $input_params{'order'};
6347        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6348                die_error(400, "Unknown order parameter");
6349        }
6350
6351        my @list = git_get_projects_list($project_filter, $strict_export);
6352        if (!@list) {
6353                die_error(404, "No projects found");
6354        }
6355
6356        git_header_html();
6357        if (defined $home_text && -f $home_text) {
6358                print "<div class=\"index_include\">\n";
6359                insert_file($home_text);
6360                print "</div>\n";
6361        }
6362
6363        git_project_search_form($searchtext, $search_use_regexp);
6364        git_project_list_body(\@list, $order);
6365        git_footer_html();
6366}
6367
6368sub git_forks {
6369        my $order = $input_params{'order'};
6370        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6371                die_error(400, "Unknown order parameter");
6372        }
6373
6374        my $filter = $project;
6375        $filter =~ s/\.git$//;
6376        my @list = git_get_projects_list($filter);
6377        if (!@list) {
6378                die_error(404, "No forks found");
6379        }
6380
6381        git_header_html();
6382        git_print_page_nav('','');
6383        git_print_header_div('summary', "$project forks");
6384        git_project_list_body(\@list, $order);
6385        git_footer_html();
6386}
6387
6388sub git_project_index {
6389        my @projects = git_get_projects_list($project_filter, $strict_export);
6390        if (!@projects) {
6391                die_error(404, "No projects found");
6392        }
6393
6394        print $cgi->header(
6395                -type => 'text/plain',
6396                -charset => 'utf-8',
6397                -content_disposition => 'inline; filename="index.aux"');
6398
6399        foreach my $pr (@projects) {
6400                if (!exists $pr->{'owner'}) {
6401                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6402                }
6403
6404                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6405                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6406                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6407                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6408                $path  =~ s/ /\+/g;
6409                $owner =~ s/ /\+/g;
6410
6411                print "$path $owner\n";
6412        }
6413}
6414
6415sub git_summary {
6416        my $descr = git_get_project_description($project) || "none";
6417        my %co = parse_commit("HEAD");
6418        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6419        my $head = $co{'id'};
6420        my $remote_heads = gitweb_check_feature('remote_heads');
6421
6422        my $owner = git_get_project_owner($project);
6423
6424        my $refs = git_get_references();
6425        # These get_*_list functions return one more to allow us to see if
6426        # there are more ...
6427        my @taglist  = git_get_tags_list(16);
6428        my @headlist = git_get_heads_list(16);
6429        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6430        my @forklist;
6431        my $check_forks = gitweb_check_feature('forks');
6432
6433        if ($check_forks) {
6434                # find forks of a project
6435                my $filter = $project;
6436                $filter =~ s/\.git$//;
6437                @forklist = git_get_projects_list($filter);
6438                # filter out forks of forks
6439                @forklist = filter_forks_from_projects_list(\@forklist)
6440                        if (@forklist);
6441        }
6442
6443        git_header_html();
6444        git_print_page_nav('summary','', $head);
6445
6446        print "<div class=\"title\">&nbsp;</div>\n";
6447        print "<table class=\"projects_list\">\n" .
6448              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6449        unless ($omit_owner) {
6450                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6451        }
6452        if (defined $cd{'rfc2822'}) {
6453                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6454                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6455        }
6456
6457        # use per project git URL list in $projectroot/$project/cloneurl
6458        # or make project git URL from git base URL and project name
6459        my $url_tag = "URL";
6460        my @url_list = git_get_project_url_list($project);
6461        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6462        foreach my $git_url (@url_list) {
6463                next unless $git_url;
6464                print format_repo_url($url_tag, $git_url);
6465                $url_tag = "";
6466        }
6467
6468        # Tag cloud
6469        my $show_ctags = gitweb_check_feature('ctags');
6470        if ($show_ctags) {
6471                my $ctags = git_get_project_ctags($project);
6472                if (%$ctags) {
6473                        # without ability to add tags, don't show if there are none
6474                        my $cloud = git_populate_project_tagcloud($ctags);
6475                        print "<tr id=\"metadata_ctags\">" .
6476                              "<td>content tags</td>" .
6477                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6478                              "</tr>\n";
6479                }
6480        }
6481
6482        print "</table>\n";
6483
6484        # If XSS prevention is on, we don't include README.html.
6485        # TODO: Allow a readme in some safe format.
6486        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6487                print "<div class=\"title\">readme</div>\n" .
6488                      "<div class=\"readme\">\n";
6489                insert_file("$projectroot/$project/README.html");
6490                print "\n</div>\n"; # class="readme"
6491        }
6492
6493        # we need to request one more than 16 (0..15) to check if
6494        # those 16 are all
6495        my @commitlist = $head ? parse_commits($head, 17) : ();
6496        if (@commitlist) {
6497                git_print_header_div('shortlog');
6498                git_shortlog_body(\@commitlist, 0, 15, $refs,
6499                                  $#commitlist <=  15 ? undef :
6500                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6501        }
6502
6503        if (@taglist) {
6504                git_print_header_div('tags');
6505                git_tags_body(\@taglist, 0, 15,
6506                              $#taglist <=  15 ? undef :
6507                              $cgi->a({-href => href(action=>"tags")}, "..."));
6508        }
6509
6510        if (@headlist) {
6511                git_print_header_div('heads');
6512                git_heads_body(\@headlist, $head, 0, 15,
6513                               $#headlist <= 15 ? undef :
6514                               $cgi->a({-href => href(action=>"heads")}, "..."));
6515        }
6516
6517        if (%remotedata) {
6518                git_print_header_div('remotes');
6519                git_remotes_body(\%remotedata, 15, $head);
6520        }
6521
6522        if (@forklist) {
6523                git_print_header_div('forks');
6524                git_project_list_body(\@forklist, 'age', 0, 15,
6525                                      $#forklist <= 15 ? undef :
6526                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6527                                      'no_header');
6528        }
6529
6530        git_footer_html();
6531}
6532
6533sub git_tag {
6534        my %tag = parse_tag($hash);
6535
6536        if (! %tag) {
6537                die_error(404, "Unknown tag object");
6538        }
6539
6540        my $head = git_get_head_hash($project);
6541        git_header_html();
6542        git_print_page_nav('','', $head,undef,$head);
6543        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6544        print "<div class=\"title_text\">\n" .
6545              "<table class=\"object_header\">\n" .
6546              "<tr>\n" .
6547              "<td>object</td>\n" .
6548              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6549                               $tag{'object'}) . "</td>\n" .
6550              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6551                                              $tag{'type'}) . "</td>\n" .
6552              "</tr>\n";
6553        if (defined($tag{'author'})) {
6554                git_print_authorship_rows(\%tag, 'author');
6555        }
6556        print "</table>\n\n" .
6557              "</div>\n";
6558        print "<div class=\"page_body\">";
6559        my $comment = $tag{'comment'};
6560        foreach my $line (@$comment) {
6561                chomp $line;
6562                print esc_html($line, -nbsp=>1) . "<br/>\n";
6563        }
6564        print "</div>\n";
6565        git_footer_html();
6566}
6567
6568sub git_blame_common {
6569        my $format = shift || 'porcelain';
6570        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6571                $format = 'incremental';
6572                $action = 'blame_incremental'; # for page title etc
6573        }
6574
6575        # permissions
6576        gitweb_check_feature('blame')
6577                or die_error(403, "Blame view not allowed");
6578
6579        # error checking
6580        die_error(400, "No file name given") unless $file_name;
6581        $hash_base ||= git_get_head_hash($project);
6582        die_error(404, "Couldn't find base commit") unless $hash_base;
6583        my %co = parse_commit($hash_base)
6584                or die_error(404, "Commit not found");
6585        my $ftype = "blob";
6586        if (!defined $hash) {
6587                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6588                        or die_error(404, "Error looking up file");
6589        } else {
6590                $ftype = git_get_type($hash);
6591                if ($ftype !~ "blob") {
6592                        die_error(400, "Object is not a blob");
6593                }
6594        }
6595
6596        my $fd;
6597        if ($format eq 'incremental') {
6598                # get file contents (as base)
6599                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6600                        or die_error(500, "Open git-cat-file failed");
6601        } elsif ($format eq 'data') {
6602                # run git-blame --incremental
6603                open $fd, "-|", git_cmd(), "blame", "--incremental",
6604                        $hash_base, "--", $file_name
6605                        or die_error(500, "Open git-blame --incremental failed");
6606        } else {
6607                # run git-blame --porcelain
6608                open $fd, "-|", git_cmd(), "blame", '-p',
6609                        $hash_base, '--', $file_name
6610                        or die_error(500, "Open git-blame --porcelain failed");
6611        }
6612
6613        # incremental blame data returns early
6614        if ($format eq 'data') {
6615                print $cgi->header(
6616                        -type=>"text/plain", -charset => "utf-8",
6617                        -status=> "200 OK");
6618                local $| = 1; # output autoflush
6619                while (my $line = <$fd>) {
6620                        print to_utf8($line);
6621                }
6622                close $fd
6623                        or print "ERROR $!\n";
6624
6625                print 'END';
6626                if (defined $t0 && gitweb_check_feature('timed')) {
6627                        print ' '.
6628                              tv_interval($t0, [ gettimeofday() ]).
6629                              ' '.$number_of_git_cmds;
6630                }
6631                print "\n";
6632
6633                return;
6634        }
6635
6636        # page header
6637        git_header_html();
6638        my $formats_nav =
6639                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6640                        "blob") .
6641                " | ";
6642        if ($format eq 'incremental') {
6643                $formats_nav .=
6644                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6645                                "blame") . " (non-incremental)";
6646        } else {
6647                $formats_nav .=
6648                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6649                                "blame") . " (incremental)";
6650        }
6651        $formats_nav .=
6652                " | " .
6653                $cgi->a({-href => href(action=>"history", -replay=>1)},
6654                        "history") .
6655                " | " .
6656                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6657                        "HEAD");
6658        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6659        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6660        git_print_page_path($file_name, $ftype, $hash_base);
6661
6662        # page body
6663        if ($format eq 'incremental') {
6664                print "<noscript>\n<div class=\"error\"><center><b>\n".
6665                      "This page requires JavaScript to run.\n Use ".
6666                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6667                              'this page').
6668                      " instead.\n".
6669                      "</b></center></div>\n</noscript>\n";
6670
6671                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6672        }
6673
6674        print qq!<div class="page_body">\n!;
6675        print qq!<div id="progress_info">... / ...</div>\n!
6676                if ($format eq 'incremental');
6677        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6678              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6679              qq!<thead>\n!.
6680              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6681              qq!</thead>\n!.
6682              qq!<tbody>\n!;
6683
6684        my @rev_color = qw(light dark);
6685        my $num_colors = scalar(@rev_color);
6686        my $current_color = 0;
6687
6688        if ($format eq 'incremental') {
6689                my $color_class = $rev_color[$current_color];
6690
6691                #contents of a file
6692                my $linenr = 0;
6693        LINE:
6694                while (my $line = <$fd>) {
6695                        chomp $line;
6696                        $linenr++;
6697
6698                        print qq!<tr id="l$linenr" class="$color_class">!.
6699                              qq!<td class="sha1"><a href=""> </a></td>!.
6700                              qq!<td class="linenr">!.
6701                              qq!<a class="linenr" href="">$linenr</a></td>!;
6702                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6703                        print qq!</tr>\n!;
6704                }
6705
6706        } else { # porcelain, i.e. ordinary blame
6707                my %metainfo = (); # saves information about commits
6708
6709                # blame data
6710        LINE:
6711                while (my $line = <$fd>) {
6712                        chomp $line;
6713                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6714                        # no <lines in group> for subsequent lines in group of lines
6715                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6716                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6717                        if (!exists $metainfo{$full_rev}) {
6718                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6719                        }
6720                        my $meta = $metainfo{$full_rev};
6721                        my $data;
6722                        while ($data = <$fd>) {
6723                                chomp $data;
6724                                last if ($data =~ s/^\t//); # contents of line
6725                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6726                                        $meta->{$1} = $2 unless exists $meta->{$1};
6727                                }
6728                                if ($data =~ /^previous /) {
6729                                        $meta->{'nprevious'}++;
6730                                }
6731                        }
6732                        my $short_rev = substr($full_rev, 0, 8);
6733                        my $author = $meta->{'author'};
6734                        my %date =
6735                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6736                        my $date = $date{'iso-tz'};
6737                        if ($group_size) {
6738                                $current_color = ($current_color + 1) % $num_colors;
6739                        }
6740                        my $tr_class = $rev_color[$current_color];
6741                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6742                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6743                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6744                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6745                        if ($group_size) {
6746                                print "<td class=\"sha1\"";
6747                                print " title=\"". esc_html($author) . ", $date\"";
6748                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6749                                print ">";
6750                                print $cgi->a({-href => href(action=>"commit",
6751                                                             hash=>$full_rev,
6752                                                             file_name=>$file_name)},
6753                                              esc_html($short_rev));
6754                                if ($group_size >= 2) {
6755                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6756                                        if (@author_initials) {
6757                                                print "<br />" .
6758                                                      esc_html(join('', @author_initials));
6759                                                #           or join('.', ...)
6760                                        }
6761                                }
6762                                print "</td>\n";
6763                        }
6764                        # 'previous' <sha1 of parent commit> <filename at commit>
6765                        if (exists $meta->{'previous'} &&
6766                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6767                                $meta->{'parent'} = $1;
6768                                $meta->{'file_parent'} = unquote($2);
6769                        }
6770                        my $linenr_commit =
6771                                exists($meta->{'parent'}) ?
6772                                $meta->{'parent'} : $full_rev;
6773                        my $linenr_filename =
6774                                exists($meta->{'file_parent'}) ?
6775                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6776                        my $blamed = href(action => 'blame',
6777                                          file_name => $linenr_filename,
6778                                          hash_base => $linenr_commit);
6779                        print "<td class=\"linenr\">";
6780                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6781                                        -class => "linenr" },
6782                                      esc_html($lineno));
6783                        print "</td>";
6784                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6785                        print "</tr>\n";
6786                } # end while
6787
6788        }
6789
6790        # footer
6791        print "</tbody>\n".
6792              "</table>\n"; # class="blame"
6793        print "</div>\n";   # class="blame_body"
6794        close $fd
6795                or print "Reading blob failed\n";
6796
6797        git_footer_html();
6798}
6799
6800sub git_blame {
6801        git_blame_common();
6802}
6803
6804sub git_blame_incremental {
6805        git_blame_common('incremental');
6806}
6807
6808sub git_blame_data {
6809        git_blame_common('data');
6810}
6811
6812sub git_tags {
6813        my $head = git_get_head_hash($project);
6814        git_header_html();
6815        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6816        git_print_header_div('summary', $project);
6817
6818        my @tagslist = git_get_tags_list();
6819        if (@tagslist) {
6820                git_tags_body(\@tagslist);
6821        }
6822        git_footer_html();
6823}
6824
6825sub git_heads {
6826        my $head = git_get_head_hash($project);
6827        git_header_html();
6828        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6829        git_print_header_div('summary', $project);
6830
6831        my @headslist = git_get_heads_list();
6832        if (@headslist) {
6833                git_heads_body(\@headslist, $head);
6834        }
6835        git_footer_html();
6836}
6837
6838# used both for single remote view and for list of all the remotes
6839sub git_remotes {
6840        gitweb_check_feature('remote_heads')
6841                or die_error(403, "Remote heads view is disabled");
6842
6843        my $head = git_get_head_hash($project);
6844        my $remote = $input_params{'hash'};
6845
6846        my $remotedata = git_get_remotes_list($remote);
6847        die_error(500, "Unable to get remote information") unless defined $remotedata;
6848
6849        unless (%$remotedata) {
6850                die_error(404, defined $remote ?
6851                        "Remote $remote not found" :
6852                        "No remotes found");
6853        }
6854
6855        git_header_html(undef, undef, -action_extra => $remote);
6856        git_print_page_nav('', '',  $head, undef, $head,
6857                format_ref_views($remote ? '' : 'remotes'));
6858
6859        fill_remote_heads($remotedata);
6860        if (defined $remote) {
6861                git_print_header_div('remotes', "$remote remote for $project");
6862                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6863        } else {
6864                git_print_header_div('summary', "$project remotes");
6865                git_remotes_body($remotedata, undef, $head);
6866        }
6867
6868        git_footer_html();
6869}
6870
6871sub git_blob_plain {
6872        my $type = shift;
6873        my $expires;
6874
6875        if (!defined $hash) {
6876                if (defined $file_name) {
6877                        my $base = $hash_base || git_get_head_hash($project);
6878                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6879                                or die_error(404, "Cannot find file");
6880                } else {
6881                        die_error(400, "No file name defined");
6882                }
6883        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6884                # blobs defined by non-textual hash id's can be cached
6885                $expires = "+1d";
6886        }
6887
6888        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6889                or die_error(500, "Open git-cat-file blob '$hash' failed");
6890
6891        # content-type (can include charset)
6892        $type = blob_contenttype($fd, $file_name, $type);
6893
6894        # "save as" filename, even when no $file_name is given
6895        my $save_as = "$hash";
6896        if (defined $file_name) {
6897                $save_as = $file_name;
6898        } elsif ($type =~ m/^text\//) {
6899                $save_as .= '.txt';
6900        }
6901
6902        # With XSS prevention on, blobs of all types except a few known safe
6903        # ones are served with "Content-Disposition: attachment" to make sure
6904        # they don't run in our security domain.  For certain image types,
6905        # blob view writes an <img> tag referring to blob_plain view, and we
6906        # want to be sure not to break that by serving the image as an
6907        # attachment (though Firefox 3 doesn't seem to care).
6908        my $sandbox = $prevent_xss &&
6909                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6910
6911        # serve text/* as text/plain
6912        if ($prevent_xss &&
6913            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6914             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6915                my $rest = $1;
6916                $rest = defined $rest ? $rest : '';
6917                $type = "text/plain$rest";
6918        }
6919
6920        print $cgi->header(
6921                -type => $type,
6922                -expires => $expires,
6923                -content_disposition =>
6924                        ($sandbox ? 'attachment' : 'inline')
6925                        . '; filename="' . $save_as . '"');
6926        local $/ = undef;
6927        binmode STDOUT, ':raw';
6928        print <$fd>;
6929        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6930        close $fd;
6931}
6932
6933sub git_blob {
6934        my $expires;
6935
6936        if (!defined $hash) {
6937                if (defined $file_name) {
6938                        my $base = $hash_base || git_get_head_hash($project);
6939                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6940                                or die_error(404, "Cannot find file");
6941                } else {
6942                        die_error(400, "No file name defined");
6943                }
6944        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6945                # blobs defined by non-textual hash id's can be cached
6946                $expires = "+1d";
6947        }
6948
6949        my $have_blame = gitweb_check_feature('blame');
6950        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6951                or die_error(500, "Couldn't cat $file_name, $hash");
6952        my $mimetype = blob_mimetype($fd, $file_name);
6953        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6954        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6955                close $fd;
6956                return git_blob_plain($mimetype);
6957        }
6958        # we can have blame only for text/* mimetype
6959        $have_blame &&= ($mimetype =~ m!^text/!);
6960
6961        my $highlight = gitweb_check_feature('highlight');
6962        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6963        $fd = run_highlighter($fd, $highlight, $syntax)
6964                if $syntax;
6965
6966        git_header_html(undef, $expires);
6967        my $formats_nav = '';
6968        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6969                if (defined $file_name) {
6970                        if ($have_blame) {
6971                                $formats_nav .=
6972                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6973                                                "blame") .
6974                                        " | ";
6975                        }
6976                        $formats_nav .=
6977                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6978                                        "history") .
6979                                " | " .
6980                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6981                                        "raw") .
6982                                " | " .
6983                                $cgi->a({-href => href(action=>"blob",
6984                                                       hash_base=>"HEAD", file_name=>$file_name)},
6985                                        "HEAD");
6986                } else {
6987                        $formats_nav .=
6988                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6989                                        "raw");
6990                }
6991                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6992                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6993        } else {
6994                print "<div class=\"page_nav\">\n" .
6995                      "<br/><br/></div>\n" .
6996                      "<div class=\"title\">".esc_html($hash)."</div>\n";
6997        }
6998        git_print_page_path($file_name, "blob", $hash_base);
6999        print "<div class=\"page_body\">\n";
7000        if ($mimetype =~ m!^image/!) {
7001                print qq!<img type="!.esc_attr($mimetype).qq!"!;
7002                if ($file_name) {
7003                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7004                }
7005                print qq! src="! .
7006                      href(action=>"blob_plain", hash=>$hash,
7007                           hash_base=>$hash_base, file_name=>$file_name) .
7008                      qq!" />\n!;
7009        } else {
7010                my $nr;
7011                while (my $line = <$fd>) {
7012                        chomp $line;
7013                        $nr++;
7014                        $line = untabify($line);
7015                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7016                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7017                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7018                }
7019        }
7020        close $fd
7021                or print "Reading blob failed.\n";
7022        print "</div>";
7023        git_footer_html();
7024}
7025
7026sub git_tree {
7027        if (!defined $hash_base) {
7028                $hash_base = "HEAD";
7029        }
7030        if (!defined $hash) {
7031                if (defined $file_name) {
7032                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7033                } else {
7034                        $hash = $hash_base;
7035                }
7036        }
7037        die_error(404, "No such tree") unless defined($hash);
7038
7039        my $show_sizes = gitweb_check_feature('show-sizes');
7040        my $have_blame = gitweb_check_feature('blame');
7041
7042        my @entries = ();
7043        {
7044                local $/ = "\0";
7045                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7046                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7047                        or die_error(500, "Open git-ls-tree failed");
7048                @entries = map { chomp; $_ } <$fd>;
7049                close $fd
7050                        or die_error(404, "Reading tree failed");
7051        }
7052
7053        my $refs = git_get_references();
7054        my $ref = format_ref_marker($refs, $hash_base);
7055        git_header_html();
7056        my $basedir = '';
7057        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7058                my @views_nav = ();
7059                if (defined $file_name) {
7060                        push @views_nav,
7061                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7062                                        "history"),
7063                                $cgi->a({-href => href(action=>"tree",
7064                                                       hash_base=>"HEAD", file_name=>$file_name)},
7065                                        "HEAD"),
7066                }
7067                my $snapshot_links = format_snapshot_links($hash);
7068                if (defined $snapshot_links) {
7069                        # FIXME: Should be available when we have no hash base as well.
7070                        push @views_nav, $snapshot_links;
7071                }
7072                git_print_page_nav('tree','', $hash_base, undef, undef,
7073                                   join(' | ', @views_nav));
7074                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7075        } else {
7076                undef $hash_base;
7077                print "<div class=\"page_nav\">\n";
7078                print "<br/><br/></div>\n";
7079                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7080        }
7081        if (defined $file_name) {
7082                $basedir = $file_name;
7083                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7084                        $basedir .= '/';
7085                }
7086                git_print_page_path($file_name, 'tree', $hash_base);
7087        }
7088        print "<div class=\"page_body\">\n";
7089        print "<table class=\"tree\">\n";
7090        my $alternate = 1;
7091        # '..' (top directory) link if possible
7092        if (defined $hash_base &&
7093            defined $file_name && $file_name =~ m![^/]+$!) {
7094                if ($alternate) {
7095                        print "<tr class=\"dark\">\n";
7096                } else {
7097                        print "<tr class=\"light\">\n";
7098                }
7099                $alternate ^= 1;
7100
7101                my $up = $file_name;
7102                $up =~ s!/?[^/]+$!!;
7103                undef $up unless $up;
7104                # based on git_print_tree_entry
7105                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7106                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7107                print '<td class="list">';
7108                print $cgi->a({-href => href(action=>"tree",
7109                                             hash_base=>$hash_base,
7110                                             file_name=>$up)},
7111                              "..");
7112                print "</td>\n";
7113                print "<td class=\"link\"></td>\n";
7114
7115                print "</tr>\n";
7116        }
7117        foreach my $line (@entries) {
7118                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7119
7120                if ($alternate) {
7121                        print "<tr class=\"dark\">\n";
7122                } else {
7123                        print "<tr class=\"light\">\n";
7124                }
7125                $alternate ^= 1;
7126
7127                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7128
7129                print "</tr>\n";
7130        }
7131        print "</table>\n" .
7132              "</div>";
7133        git_footer_html();
7134}
7135
7136sub snapshot_name {
7137        my ($project, $hash) = @_;
7138
7139        # path/to/project.git  -> project
7140        # path/to/project/.git -> project
7141        my $name = to_utf8($project);
7142        $name =~ s,([^/])/*\.git$,$1,;
7143        $name = basename($name);
7144        # sanitize name
7145        $name =~ s/[[:cntrl:]]/?/g;
7146
7147        my $ver = $hash;
7148        if ($hash =~ /^[0-9a-fA-F]+$/) {
7149                # shorten SHA-1 hash
7150                my $full_hash = git_get_full_hash($project, $hash);
7151                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7152                        $ver = git_get_short_hash($project, $hash);
7153                }
7154        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7155                # tags don't need shortened SHA-1 hash
7156                $ver = $1;
7157        } else {
7158                # branches and other need shortened SHA-1 hash
7159                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7160                        $ver = $1;
7161                }
7162                $ver .= '-' . git_get_short_hash($project, $hash);
7163        }
7164        # in case of hierarchical branch names
7165        $ver =~ s!/!.!g;
7166
7167        # name = project-version_string
7168        $name = "$name-$ver";
7169
7170        return wantarray ? ($name, $name) : $name;
7171}
7172
7173sub exit_if_unmodified_since {
7174        my ($latest_epoch) = @_;
7175        our $cgi;
7176
7177        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7178        if (defined $if_modified) {
7179                my $since;
7180                if (eval { require HTTP::Date; 1; }) {
7181                        $since = HTTP::Date::str2time($if_modified);
7182                } elsif (eval { require Time::ParseDate; 1; }) {
7183                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7184                }
7185                if (defined $since && $latest_epoch <= $since) {
7186                        my %latest_date = parse_date($latest_epoch);
7187                        print $cgi->header(
7188                                -last_modified => $latest_date{'rfc2822'},
7189                                -status => '304 Not Modified');
7190                        goto DONE_GITWEB;
7191                }
7192        }
7193}
7194
7195sub git_snapshot {
7196        my $format = $input_params{'snapshot_format'};
7197        if (!@snapshot_fmts) {
7198                die_error(403, "Snapshots not allowed");
7199        }
7200        # default to first supported snapshot format
7201        $format ||= $snapshot_fmts[0];
7202        if ($format !~ m/^[a-z0-9]+$/) {
7203                die_error(400, "Invalid snapshot format parameter");
7204        } elsif (!exists($known_snapshot_formats{$format})) {
7205                die_error(400, "Unknown snapshot format");
7206        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7207                die_error(403, "Snapshot format not allowed");
7208        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7209                die_error(403, "Unsupported snapshot format");
7210        }
7211
7212        my $type = git_get_type("$hash^{}");
7213        if (!$type) {
7214                die_error(404, 'Object does not exist');
7215        }  elsif ($type eq 'blob') {
7216                die_error(400, 'Object is not a tree-ish');
7217        }
7218
7219        my ($name, $prefix) = snapshot_name($project, $hash);
7220        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7221
7222        my %co = parse_commit($hash);
7223        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7224
7225        my $cmd = quote_command(
7226                git_cmd(), 'archive',
7227                "--format=$known_snapshot_formats{$format}{'format'}",
7228                "--prefix=$prefix/", $hash);
7229        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7230                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7231        }
7232
7233        $filename =~ s/(["\\])/\\$1/g;
7234        my %latest_date;
7235        if (%co) {
7236                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7237        }
7238
7239        print $cgi->header(
7240                -type => $known_snapshot_formats{$format}{'type'},
7241                -content_disposition => 'inline; filename="' . $filename . '"',
7242                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7243                -status => '200 OK');
7244
7245        open my $fd, "-|", $cmd
7246                or die_error(500, "Execute git-archive failed");
7247        binmode STDOUT, ':raw';
7248        print <$fd>;
7249        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7250        close $fd;
7251}
7252
7253sub git_log_generic {
7254        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7255
7256        my $head = git_get_head_hash($project);
7257        if (!defined $base) {
7258                $base = $head;
7259        }
7260        if (!defined $page) {
7261                $page = 0;
7262        }
7263        my $refs = git_get_references();
7264
7265        my $commit_hash = $base;
7266        if (defined $parent) {
7267                $commit_hash = "$parent..$base";
7268        }
7269        my @commitlist =
7270                parse_commits($commit_hash, 101, (100 * $page),
7271                              defined $file_name ? ($file_name, "--full-history") : ());
7272
7273        my $ftype;
7274        if (!defined $file_hash && defined $file_name) {
7275                # some commits could have deleted file in question,
7276                # and not have it in tree, but one of them has to have it
7277                for (my $i = 0; $i < @commitlist; $i++) {
7278                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7279                        last if defined $file_hash;
7280                }
7281        }
7282        if (defined $file_hash) {
7283                $ftype = git_get_type($file_hash);
7284        }
7285        if (defined $file_name && !defined $ftype) {
7286                die_error(500, "Unknown type of object");
7287        }
7288        my %co;
7289        if (defined $file_name) {
7290                %co = parse_commit($base)
7291                        or die_error(404, "Unknown commit object");
7292        }
7293
7294
7295        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7296        my $next_link = '';
7297        if ($#commitlist >= 100) {
7298                $next_link =
7299                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7300                                 -accesskey => "n", -title => "Alt-n"}, "next");
7301        }
7302        my $patch_max = gitweb_get_feature('patches');
7303        if ($patch_max && !defined $file_name) {
7304                if ($patch_max < 0 || @commitlist <= $patch_max) {
7305                        $paging_nav .= " &sdot; " .
7306                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7307                                        "patches");
7308                }
7309        }
7310
7311        git_header_html();
7312        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7313        if (defined $file_name) {
7314                git_print_header_div('commit', esc_html($co{'title'}), $base);
7315        } else {
7316                git_print_header_div('summary', $project)
7317        }
7318        git_print_page_path($file_name, $ftype, $hash_base)
7319                if (defined $file_name);
7320
7321        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7322                     $file_name, $file_hash, $ftype);
7323
7324        git_footer_html();
7325}
7326
7327sub git_log {
7328        git_log_generic('log', \&git_log_body,
7329                        $hash, $hash_parent);
7330}
7331
7332sub git_commit {
7333        $hash ||= $hash_base || "HEAD";
7334        my %co = parse_commit($hash)
7335            or die_error(404, "Unknown commit object");
7336
7337        my $parent  = $co{'parent'};
7338        my $parents = $co{'parents'}; # listref
7339
7340        # we need to prepare $formats_nav before any parameter munging
7341        my $formats_nav;
7342        if (!defined $parent) {
7343                # --root commitdiff
7344                $formats_nav .= '(initial)';
7345        } elsif (@$parents == 1) {
7346                # single parent commit
7347                $formats_nav .=
7348                        '(parent: ' .
7349                        $cgi->a({-href => href(action=>"commit",
7350                                               hash=>$parent)},
7351                                esc_html(substr($parent, 0, 7))) .
7352                        ')';
7353        } else {
7354                # merge commit
7355                $formats_nav .=
7356                        '(merge: ' .
7357                        join(' ', map {
7358                                $cgi->a({-href => href(action=>"commit",
7359                                                       hash=>$_)},
7360                                        esc_html(substr($_, 0, 7)));
7361                        } @$parents ) .
7362                        ')';
7363        }
7364        if (gitweb_check_feature('patches') && @$parents <= 1) {
7365                $formats_nav .= " | " .
7366                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7367                                "patch");
7368        }
7369
7370        if (!defined $parent) {
7371                $parent = "--root";
7372        }
7373        my @difftree;
7374        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7375                @diff_opts,
7376                (@$parents <= 1 ? $parent : '-c'),
7377                $hash, "--"
7378                or die_error(500, "Open git-diff-tree failed");
7379        @difftree = map { chomp; $_ } <$fd>;
7380        close $fd or die_error(404, "Reading git-diff-tree failed");
7381
7382        # non-textual hash id's can be cached
7383        my $expires;
7384        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7385                $expires = "+1d";
7386        }
7387        my $refs = git_get_references();
7388        my $ref = format_ref_marker($refs, $co{'id'});
7389
7390        git_header_html(undef, $expires);
7391        git_print_page_nav('commit', '',
7392                           $hash, $co{'tree'}, $hash,
7393                           $formats_nav);
7394
7395        if (defined $co{'parent'}) {
7396                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7397        } else {
7398                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7399        }
7400        print "<div class=\"title_text\">\n" .
7401              "<table class=\"object_header\">\n";
7402        git_print_authorship_rows(\%co);
7403        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7404        print "<tr>" .
7405              "<td>tree</td>" .
7406              "<td class=\"sha1\">" .
7407              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7408                       class => "list"}, $co{'tree'}) .
7409              "</td>" .
7410              "<td class=\"link\">" .
7411              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7412                      "tree");
7413        my $snapshot_links = format_snapshot_links($hash);
7414        if (defined $snapshot_links) {
7415                print " | " . $snapshot_links;
7416        }
7417        print "</td>" .
7418              "</tr>\n";
7419
7420        foreach my $par (@$parents) {
7421                print "<tr>" .
7422                      "<td>parent</td>" .
7423                      "<td class=\"sha1\">" .
7424                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7425                               class => "list"}, $par) .
7426                      "</td>" .
7427                      "<td class=\"link\">" .
7428                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7429                      " | " .
7430                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7431                      "</td>" .
7432                      "</tr>\n";
7433        }
7434        print "</table>".
7435              "</div>\n";
7436
7437        print "<div class=\"page_body\">\n";
7438        git_print_log($co{'comment'});
7439        print "</div>\n";
7440
7441        git_difftree_body(\@difftree, $hash, @$parents);
7442
7443        git_footer_html();
7444}
7445
7446sub git_object {
7447        # object is defined by:
7448        # - hash or hash_base alone
7449        # - hash_base and file_name
7450        my $type;
7451
7452        # - hash or hash_base alone
7453        if ($hash || ($hash_base && !defined $file_name)) {
7454                my $object_id = $hash || $hash_base;
7455
7456                open my $fd, "-|", quote_command(
7457                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7458                        or die_error(404, "Object does not exist");
7459                $type = <$fd>;
7460                chomp $type;
7461                close $fd
7462                        or die_error(404, "Object does not exist");
7463
7464        # - hash_base and file_name
7465        } elsif ($hash_base && defined $file_name) {
7466                $file_name =~ s,/+$,,;
7467
7468                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7469                        or die_error(404, "Base object does not exist");
7470
7471                # here errors should not hapen
7472                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7473                        or die_error(500, "Open git-ls-tree failed");
7474                my $line = <$fd>;
7475                close $fd;
7476
7477                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7478                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7479                        die_error(404, "File or directory for given base does not exist");
7480                }
7481                $type = $2;
7482                $hash = $3;
7483        } else {
7484                die_error(400, "Not enough information to find object");
7485        }
7486
7487        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7488                                          hash=>$hash, hash_base=>$hash_base,
7489                                          file_name=>$file_name),
7490                             -status => '302 Found');
7491}
7492
7493sub git_blobdiff {
7494        my $format = shift || 'html';
7495        my $diff_style = $input_params{'diff_style'} || 'inline';
7496
7497        my $fd;
7498        my @difftree;
7499        my %diffinfo;
7500        my $expires;
7501
7502        # preparing $fd and %diffinfo for git_patchset_body
7503        # new style URI
7504        if (defined $hash_base && defined $hash_parent_base) {
7505                if (defined $file_name) {
7506                        # read raw output
7507                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7508                                $hash_parent_base, $hash_base,
7509                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7510                                or die_error(500, "Open git-diff-tree failed");
7511                        @difftree = map { chomp; $_ } <$fd>;
7512                        close $fd
7513                                or die_error(404, "Reading git-diff-tree failed");
7514                        @difftree
7515                                or die_error(404, "Blob diff not found");
7516
7517                } elsif (defined $hash &&
7518                         $hash =~ /[0-9a-fA-F]{40}/) {
7519                        # try to find filename from $hash
7520
7521                        # read filtered raw output
7522                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7523                                $hash_parent_base, $hash_base, "--"
7524                                or die_error(500, "Open git-diff-tree failed");
7525                        @difftree =
7526                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7527                                # $hash == to_id
7528                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7529                                map { chomp; $_ } <$fd>;
7530                        close $fd
7531                                or die_error(404, "Reading git-diff-tree failed");
7532                        @difftree
7533                                or die_error(404, "Blob diff not found");
7534
7535                } else {
7536                        die_error(400, "Missing one of the blob diff parameters");
7537                }
7538
7539                if (@difftree > 1) {
7540                        die_error(400, "Ambiguous blob diff specification");
7541                }
7542
7543                %diffinfo = parse_difftree_raw_line($difftree[0]);
7544                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7545                $file_name   ||= $diffinfo{'to_file'};
7546
7547                $hash_parent ||= $diffinfo{'from_id'};
7548                $hash        ||= $diffinfo{'to_id'};
7549
7550                # non-textual hash id's can be cached
7551                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7552                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7553                        $expires = '+1d';
7554                }
7555
7556                # open patch output
7557                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7558                        '-p', ($format eq 'html' ? "--full-index" : ()),
7559                        $hash_parent_base, $hash_base,
7560                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7561                        or die_error(500, "Open git-diff-tree failed");
7562        }
7563
7564        # old/legacy style URI -- not generated anymore since 1.4.3.
7565        if (!%diffinfo) {
7566                die_error('404 Not Found', "Missing one of the blob diff parameters")
7567        }
7568
7569        # header
7570        if ($format eq 'html') {
7571                my $formats_nav =
7572                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7573                                "raw");
7574                $formats_nav .= diff_style_nav($diff_style);
7575                git_header_html(undef, $expires);
7576                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7577                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7578                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7579                } else {
7580                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7581                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7582                }
7583                if (defined $file_name) {
7584                        git_print_page_path($file_name, "blob", $hash_base);
7585                } else {
7586                        print "<div class=\"page_path\"></div>\n";
7587                }
7588
7589        } elsif ($format eq 'plain') {
7590                print $cgi->header(
7591                        -type => 'text/plain',
7592                        -charset => 'utf-8',
7593                        -expires => $expires,
7594                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7595
7596                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7597
7598        } else {
7599                die_error(400, "Unknown blobdiff format");
7600        }
7601
7602        # patch
7603        if ($format eq 'html') {
7604                print "<div class=\"page_body\">\n";
7605
7606                git_patchset_body($fd, $diff_style,
7607                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7608                close $fd;
7609
7610                print "</div>\n"; # class="page_body"
7611                git_footer_html();
7612
7613        } else {
7614                while (my $line = <$fd>) {
7615                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7616                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7617
7618                        print $line;
7619
7620                        last if $line =~ m!^\+\+\+!;
7621                }
7622                local $/ = undef;
7623                print <$fd>;
7624                close $fd;
7625        }
7626}
7627
7628sub git_blobdiff_plain {
7629        git_blobdiff('plain');
7630}
7631
7632# assumes that it is added as later part of already existing navigation,
7633# so it returns "| foo | bar" rather than just "foo | bar"
7634sub diff_style_nav {
7635        my ($diff_style, $is_combined) = @_;
7636        $diff_style ||= 'inline';
7637
7638        return "" if ($is_combined);
7639
7640        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7641        my %styles = @styles;
7642        @styles =
7643                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7644
7645        return join '',
7646                map { " | ".$_ }
7647                map {
7648                        $_ eq $diff_style ? $styles{$_} :
7649                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7650                } @styles;
7651}
7652
7653sub git_commitdiff {
7654        my %params = @_;
7655        my $format = $params{-format} || 'html';
7656        my $diff_style = $input_params{'diff_style'} || 'inline';
7657
7658        my ($patch_max) = gitweb_get_feature('patches');
7659        if ($format eq 'patch') {
7660                die_error(403, "Patch view not allowed") unless $patch_max;
7661        }
7662
7663        $hash ||= $hash_base || "HEAD";
7664        my %co = parse_commit($hash)
7665            or die_error(404, "Unknown commit object");
7666
7667        # choose format for commitdiff for merge
7668        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7669                $hash_parent = '--cc';
7670        }
7671        # we need to prepare $formats_nav before almost any parameter munging
7672        my $formats_nav;
7673        if ($format eq 'html') {
7674                $formats_nav =
7675                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7676                                "raw");
7677                if ($patch_max && @{$co{'parents'}} <= 1) {
7678                        $formats_nav .= " | " .
7679                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7680                                        "patch");
7681                }
7682                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7683
7684                if (defined $hash_parent &&
7685                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7686                        # commitdiff with two commits given
7687                        my $hash_parent_short = $hash_parent;
7688                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7689                                $hash_parent_short = substr($hash_parent, 0, 7);
7690                        }
7691                        $formats_nav .=
7692                                ' (from';
7693                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7694                                if ($co{'parents'}[$i] eq $hash_parent) {
7695                                        $formats_nav .= ' parent ' . ($i+1);
7696                                        last;
7697                                }
7698                        }
7699                        $formats_nav .= ': ' .
7700                                $cgi->a({-href => href(-replay=>1,
7701                                                       hash=>$hash_parent, hash_base=>undef)},
7702                                        esc_html($hash_parent_short)) .
7703                                ')';
7704                } elsif (!$co{'parent'}) {
7705                        # --root commitdiff
7706                        $formats_nav .= ' (initial)';
7707                } elsif (scalar @{$co{'parents'}} == 1) {
7708                        # single parent commit
7709                        $formats_nav .=
7710                                ' (parent: ' .
7711                                $cgi->a({-href => href(-replay=>1,
7712                                                       hash=>$co{'parent'}, hash_base=>undef)},
7713                                        esc_html(substr($co{'parent'}, 0, 7))) .
7714                                ')';
7715                } else {
7716                        # merge commit
7717                        if ($hash_parent eq '--cc') {
7718                                $formats_nav .= ' | ' .
7719                                        $cgi->a({-href => href(-replay=>1,
7720                                                               hash=>$hash, hash_parent=>'-c')},
7721                                                'combined');
7722                        } else { # $hash_parent eq '-c'
7723                                $formats_nav .= ' | ' .
7724                                        $cgi->a({-href => href(-replay=>1,
7725                                                               hash=>$hash, hash_parent=>'--cc')},
7726                                                'compact');
7727                        }
7728                        $formats_nav .=
7729                                ' (merge: ' .
7730                                join(' ', map {
7731                                        $cgi->a({-href => href(-replay=>1,
7732                                                               hash=>$_, hash_base=>undef)},
7733                                                esc_html(substr($_, 0, 7)));
7734                                } @{$co{'parents'}} ) .
7735                                ')';
7736                }
7737        }
7738
7739        my $hash_parent_param = $hash_parent;
7740        if (!defined $hash_parent_param) {
7741                # --cc for multiple parents, --root for parentless
7742                $hash_parent_param =
7743                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7744        }
7745
7746        # read commitdiff
7747        my $fd;
7748        my @difftree;
7749        if ($format eq 'html') {
7750                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7751                        "--no-commit-id", "--patch-with-raw", "--full-index",
7752                        $hash_parent_param, $hash, "--"
7753                        or die_error(500, "Open git-diff-tree failed");
7754
7755                while (my $line = <$fd>) {
7756                        chomp $line;
7757                        # empty line ends raw part of diff-tree output
7758                        last unless $line;
7759                        push @difftree, scalar parse_difftree_raw_line($line);
7760                }
7761
7762        } elsif ($format eq 'plain') {
7763                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7764                        '-p', $hash_parent_param, $hash, "--"
7765                        or die_error(500, "Open git-diff-tree failed");
7766        } elsif ($format eq 'patch') {
7767                # For commit ranges, we limit the output to the number of
7768                # patches specified in the 'patches' feature.
7769                # For single commits, we limit the output to a single patch,
7770                # diverging from the git-format-patch default.
7771                my @commit_spec = ();
7772                if ($hash_parent) {
7773                        if ($patch_max > 0) {
7774                                push @commit_spec, "-$patch_max";
7775                        }
7776                        push @commit_spec, '-n', "$hash_parent..$hash";
7777                } else {
7778                        if ($params{-single}) {
7779                                push @commit_spec, '-1';
7780                        } else {
7781                                if ($patch_max > 0) {
7782                                        push @commit_spec, "-$patch_max";
7783                                }
7784                                push @commit_spec, "-n";
7785                        }
7786                        push @commit_spec, '--root', $hash;
7787                }
7788                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7789                        '--encoding=utf8', '--stdout', @commit_spec
7790                        or die_error(500, "Open git-format-patch failed");
7791        } else {
7792                die_error(400, "Unknown commitdiff format");
7793        }
7794
7795        # non-textual hash id's can be cached
7796        my $expires;
7797        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7798                $expires = "+1d";
7799        }
7800
7801        # write commit message
7802        if ($format eq 'html') {
7803                my $refs = git_get_references();
7804                my $ref = format_ref_marker($refs, $co{'id'});
7805
7806                git_header_html(undef, $expires);
7807                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7808                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7809                print "<div class=\"title_text\">\n" .
7810                      "<table class=\"object_header\">\n";
7811                git_print_authorship_rows(\%co);
7812                print "</table>".
7813                      "</div>\n";
7814                print "<div class=\"page_body\">\n";
7815                if (@{$co{'comment'}} > 1) {
7816                        print "<div class=\"log\">\n";
7817                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7818                        print "</div>\n"; # class="log"
7819                }
7820
7821        } elsif ($format eq 'plain') {
7822                my $refs = git_get_references("tags");
7823                my $tagname = git_get_rev_name_tags($hash);
7824                my $filename = basename($project) . "-$hash.patch";
7825
7826                print $cgi->header(
7827                        -type => 'text/plain',
7828                        -charset => 'utf-8',
7829                        -expires => $expires,
7830                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7831                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7832                print "From: " . to_utf8($co{'author'}) . "\n";
7833                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7834                print "Subject: " . to_utf8($co{'title'}) . "\n";
7835
7836                print "X-Git-Tag: $tagname\n" if $tagname;
7837                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7838
7839                foreach my $line (@{$co{'comment'}}) {
7840                        print to_utf8($line) . "\n";
7841                }
7842                print "---\n\n";
7843        } elsif ($format eq 'patch') {
7844                my $filename = basename($project) . "-$hash.patch";
7845
7846                print $cgi->header(
7847                        -type => 'text/plain',
7848                        -charset => 'utf-8',
7849                        -expires => $expires,
7850                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7851        }
7852
7853        # write patch
7854        if ($format eq 'html') {
7855                my $use_parents = !defined $hash_parent ||
7856                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7857                git_difftree_body(\@difftree, $hash,
7858                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7859                print "<br/>\n";
7860
7861                git_patchset_body($fd, $diff_style,
7862                                  \@difftree, $hash,
7863                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7864                close $fd;
7865                print "</div>\n"; # class="page_body"
7866                git_footer_html();
7867
7868        } elsif ($format eq 'plain') {
7869                local $/ = undef;
7870                print <$fd>;
7871                close $fd
7872                        or print "Reading git-diff-tree failed\n";
7873        } elsif ($format eq 'patch') {
7874                local $/ = undef;
7875                print <$fd>;
7876                close $fd
7877                        or print "Reading git-format-patch failed\n";
7878        }
7879}
7880
7881sub git_commitdiff_plain {
7882        git_commitdiff(-format => 'plain');
7883}
7884
7885# format-patch-style patches
7886sub git_patch {
7887        git_commitdiff(-format => 'patch', -single => 1);
7888}
7889
7890sub git_patches {
7891        git_commitdiff(-format => 'patch');
7892}
7893
7894sub git_history {
7895        git_log_generic('history', \&git_history_body,
7896                        $hash_base, $hash_parent_base,
7897                        $file_name, $hash);
7898}
7899
7900sub git_search {
7901        $searchtype ||= 'commit';
7902
7903        # check if appropriate features are enabled
7904        gitweb_check_feature('search')
7905                or die_error(403, "Search is disabled");
7906        if ($searchtype eq 'pickaxe') {
7907                # pickaxe may take all resources of your box and run for several minutes
7908                # with every query - so decide by yourself how public you make this feature
7909                gitweb_check_feature('pickaxe')
7910                        or die_error(403, "Pickaxe search is disabled");
7911        }
7912        if ($searchtype eq 'grep') {
7913                # grep search might be potentially CPU-intensive, too
7914                gitweb_check_feature('grep')
7915                        or die_error(403, "Grep search is disabled");
7916        }
7917
7918        if (!defined $searchtext) {
7919                die_error(400, "Text field is empty");
7920        }
7921        if (!defined $hash) {
7922                $hash = git_get_head_hash($project);
7923        }
7924        my %co = parse_commit($hash);
7925        if (!%co) {
7926                die_error(404, "Unknown commit object");
7927        }
7928        if (!defined $page) {
7929                $page = 0;
7930        }
7931
7932        if ($searchtype eq 'commit' ||
7933            $searchtype eq 'author' ||
7934            $searchtype eq 'committer') {
7935                git_search_message(%co);
7936        } elsif ($searchtype eq 'pickaxe') {
7937                git_search_changes(%co);
7938        } elsif ($searchtype eq 'grep') {
7939                git_search_files(%co);
7940        } else {
7941                die_error(400, "Unknown search type");
7942        }
7943}
7944
7945sub git_search_help {
7946        git_header_html();
7947        git_print_page_nav('','', $hash,$hash,$hash);
7948        print <<EOT;
7949<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7950regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7951the pattern entered is recognized as the POSIX extended
7952<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7953insensitive).</p>
7954<dl>
7955<dt><b>commit</b></dt>
7956<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7957EOT
7958        my $have_grep = gitweb_check_feature('grep');
7959        if ($have_grep) {
7960                print <<EOT;
7961<dt><b>grep</b></dt>
7962<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7963    a different one) are searched for the given pattern. On large trees, this search can take
7964a while and put some strain on the server, so please use it with some consideration. Note that
7965due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7966case-sensitive.</dd>
7967EOT
7968        }
7969        print <<EOT;
7970<dt><b>author</b></dt>
7971<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7972<dt><b>committer</b></dt>
7973<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7974EOT
7975        my $have_pickaxe = gitweb_check_feature('pickaxe');
7976        if ($have_pickaxe) {
7977                print <<EOT;
7978<dt><b>pickaxe</b></dt>
7979<dd>All commits that caused the string to appear or disappear from any file (changes that
7980added, removed or "modified" the string) will be listed. This search can take a while and
7981takes a lot of strain on the server, so please use it wisely. Note that since you may be
7982interested even in changes just changing the case as well, this search is case sensitive.</dd>
7983EOT
7984        }
7985        print "</dl>\n";
7986        git_footer_html();
7987}
7988
7989sub git_shortlog {
7990        git_log_generic('shortlog', \&git_shortlog_body,
7991                        $hash, $hash_parent);
7992}
7993
7994## ......................................................................
7995## feeds (RSS, Atom; OPML)
7996
7997sub git_feed {
7998        my $format = shift || 'atom';
7999        my $have_blame = gitweb_check_feature('blame');
8000
8001        # Atom: http://www.atomenabled.org/developers/syndication/
8002        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8003        if ($format ne 'rss' && $format ne 'atom') {
8004                die_error(400, "Unknown web feed format");
8005        }
8006
8007        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8008        my $head = $hash || 'HEAD';
8009        my @commitlist = parse_commits($head, 150, 0, $file_name);
8010
8011        my %latest_commit;
8012        my %latest_date;
8013        my $content_type = "application/$format+xml";
8014        if (defined $cgi->http('HTTP_ACCEPT') &&
8015                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8016                # browser (feed reader) prefers text/xml
8017                $content_type = 'text/xml';
8018        }
8019        if (defined($commitlist[0])) {
8020                %latest_commit = %{$commitlist[0]};
8021                my $latest_epoch = $latest_commit{'committer_epoch'};
8022                exit_if_unmodified_since($latest_epoch);
8023                %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8024        }
8025        print $cgi->header(
8026                -type => $content_type,
8027                -charset => 'utf-8',
8028                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8029                -status => '200 OK');
8030
8031        # Optimization: skip generating the body if client asks only
8032        # for Last-Modified date.
8033        return if ($cgi->request_method() eq 'HEAD');
8034
8035        # header variables
8036        my $title = "$site_name - $project/$action";
8037        my $feed_type = 'log';
8038        if (defined $hash) {
8039                $title .= " - '$hash'";
8040                $feed_type = 'branch log';
8041                if (defined $file_name) {
8042                        $title .= " :: $file_name";
8043                        $feed_type = 'history';
8044                }
8045        } elsif (defined $file_name) {
8046                $title .= " - $file_name";
8047                $feed_type = 'history';
8048        }
8049        $title .= " $feed_type";
8050        my $descr = git_get_project_description($project);
8051        if (defined $descr) {
8052                $descr = esc_html($descr);
8053        } else {
8054                $descr = "$project " .
8055                         ($format eq 'rss' ? 'RSS' : 'Atom') .
8056                         " feed";
8057        }
8058        my $owner = git_get_project_owner($project);
8059        $owner = esc_html($owner);
8060
8061        #header
8062        my $alt_url;
8063        if (defined $file_name) {
8064                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8065        } elsif (defined $hash) {
8066                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8067        } else {
8068                $alt_url = href(-full=>1, action=>"summary");
8069        }
8070        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8071        if ($format eq 'rss') {
8072                print <<XML;
8073<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8074<channel>
8075XML
8076                print "<title>$title</title>\n" .
8077                      "<link>$alt_url</link>\n" .
8078                      "<description>$descr</description>\n" .
8079                      "<language>en</language>\n" .
8080                      # project owner is responsible for 'editorial' content
8081                      "<managingEditor>$owner</managingEditor>\n";
8082                if (defined $logo || defined $favicon) {
8083                        # prefer the logo to the favicon, since RSS
8084                        # doesn't allow both
8085                        my $img = esc_url($logo || $favicon);
8086                        print "<image>\n" .
8087                              "<url>$img</url>\n" .
8088                              "<title>$title</title>\n" .
8089                              "<link>$alt_url</link>\n" .
8090                              "</image>\n";
8091                }
8092                if (%latest_date) {
8093                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8094                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8095                }
8096                print "<generator>gitweb v.$version/$git_version</generator>\n";
8097        } elsif ($format eq 'atom') {
8098                print <<XML;
8099<feed xmlns="http://www.w3.org/2005/Atom">
8100XML
8101                print "<title>$title</title>\n" .
8102                      "<subtitle>$descr</subtitle>\n" .
8103                      '<link rel="alternate" type="text/html" href="' .
8104                      $alt_url . '" />' . "\n" .
8105                      '<link rel="self" type="' . $content_type . '" href="' .
8106                      $cgi->self_url() . '" />' . "\n" .
8107                      "<id>" . href(-full=>1) . "</id>\n" .
8108                      # use project owner for feed author
8109                      "<author><name>$owner</name></author>\n";
8110                if (defined $favicon) {
8111                        print "<icon>" . esc_url($favicon) . "</icon>\n";
8112                }
8113                if (defined $logo) {
8114                        # not twice as wide as tall: 72 x 27 pixels
8115                        print "<logo>" . esc_url($logo) . "</logo>\n";
8116                }
8117                if (! %latest_date) {
8118                        # dummy date to keep the feed valid until commits trickle in:
8119                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
8120                } else {
8121                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
8122                }
8123                print "<generator version='$version/$git_version'>gitweb</generator>\n";
8124        }
8125
8126        # contents
8127        for (my $i = 0; $i <= $#commitlist; $i++) {
8128                my %co = %{$commitlist[$i]};
8129                my $commit = $co{'id'};
8130                # we read 150, we always show 30 and the ones more recent than 48 hours
8131                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8132                        last;
8133                }
8134                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8135
8136                # get list of changed files
8137                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8138                        $co{'parent'} || "--root",
8139                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
8140                        or next;
8141                my @difftree = map { chomp; $_ } <$fd>;
8142                close $fd
8143                        or next;
8144
8145                # print element (entry, item)
8146                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8147                if ($format eq 'rss') {
8148                        print "<item>\n" .
8149                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8150                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8151                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8152                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8153                              "<link>$co_url</link>\n" .
8154                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8155                              "<content:encoded>" .
8156                              "<![CDATA[\n";
8157                } elsif ($format eq 'atom') {
8158                        print "<entry>\n" .
8159                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8160                              "<updated>$cd{'iso-8601'}</updated>\n" .
8161                              "<author>\n" .
8162                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8163                        if ($co{'author_email'}) {
8164                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8165                        }
8166                        print "</author>\n" .
8167                              # use committer for contributor
8168                              "<contributor>\n" .
8169                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8170                        if ($co{'committer_email'}) {
8171                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8172                        }
8173                        print "</contributor>\n" .
8174                              "<published>$cd{'iso-8601'}</published>\n" .
8175                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8176                              "<id>$co_url</id>\n" .
8177                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8178                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8179                }
8180                my $comment = $co{'comment'};
8181                print "<pre>\n";
8182                foreach my $line (@$comment) {
8183                        $line = esc_html($line);
8184                        print "$line\n";
8185                }
8186                print "</pre><ul>\n";
8187                foreach my $difftree_line (@difftree) {
8188                        my %difftree = parse_difftree_raw_line($difftree_line);
8189                        next if !$difftree{'from_id'};
8190
8191                        my $file = $difftree{'file'} || $difftree{'to_file'};
8192
8193                        print "<li>" .
8194                              "[" .
8195                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8196                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8197                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8198                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8199                                      -title => "diff"}, 'D');
8200                        if ($have_blame) {
8201                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8202                                                             file_name=>$file, hash_base=>$commit),
8203                                              -title => "blame"}, 'B');
8204                        }
8205                        # if this is not a feed of a file history
8206                        if (!defined $file_name || $file_name ne $file) {
8207                                print $cgi->a({-href => href(-full=>1, action=>"history",
8208                                                             file_name=>$file, hash=>$commit),
8209                                              -title => "history"}, 'H');
8210                        }
8211                        $file = esc_path($file);
8212                        print "] ".
8213                              "$file</li>\n";
8214                }
8215                if ($format eq 'rss') {
8216                        print "</ul>]]>\n" .
8217                              "</content:encoded>\n" .
8218                              "</item>\n";
8219                } elsif ($format eq 'atom') {
8220                        print "</ul>\n</div>\n" .
8221                              "</content>\n" .
8222                              "</entry>\n";
8223                }
8224        }
8225
8226        # end of feed
8227        if ($format eq 'rss') {
8228                print "</channel>\n</rss>\n";
8229        } elsif ($format eq 'atom') {
8230                print "</feed>\n";
8231        }
8232}
8233
8234sub git_rss {
8235        git_feed('rss');
8236}
8237
8238sub git_atom {
8239        git_feed('atom');
8240}
8241
8242sub git_opml {
8243        my @list = git_get_projects_list($project_filter, $strict_export);
8244        if (!@list) {
8245                die_error(404, "No projects found");
8246        }
8247
8248        print $cgi->header(
8249                -type => 'text/xml',
8250                -charset => 'utf-8',
8251                -content_disposition => 'inline; filename="opml.xml"');
8252
8253        my $title = esc_html($site_name);
8254        my $filter = " within subdirectory ";
8255        if (defined $project_filter) {
8256                $filter .= esc_html($project_filter);
8257        } else {
8258                $filter = "";
8259        }
8260        print <<XML;
8261<?xml version="1.0" encoding="utf-8"?>
8262<opml version="1.0">
8263<head>
8264  <title>$title OPML Export$filter</title>
8265</head>
8266<body>
8267<outline text="git RSS feeds">
8268XML
8269
8270        foreach my $pr (@list) {
8271                my %proj = %$pr;
8272                my $head = git_get_head_hash($proj{'path'});
8273                if (!defined $head) {
8274                        next;
8275                }
8276                $git_dir = "$projectroot/$proj{'path'}";
8277                my %co = parse_commit($head);
8278                if (!%co) {
8279                        next;
8280                }
8281
8282                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8283                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8284                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8285                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8286        }
8287        print <<XML;
8288</outline>
8289</body>
8290</opml>
8291XML
8292}