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