gitweb / gitweb.perlon commit Merge branch 'da/gitk-reload-tag-contents' into maint-1.7.11 (f463cc5)
   1#!/usr/bin/perl
   2
   3# gitweb - simple web interface to track changes in git repositories
   4#
   5# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6# (C) 2005, Christian Gierke
   7#
   8# This program is licensed under the GPLv2
   9
  10use 5.008;
  11use strict;
  12use warnings;
  13use CGI qw(:standard :escapeHTML -nosticky);
  14use CGI::Util qw(unescape);
  15use CGI::Carp qw(fatalsToBrowser set_message);
  16use Encode;
  17use Fcntl ':mode';
  18use File::Find qw();
  19use File::Basename qw(basename);
  20use Time::HiRes qw(gettimeofday tv_interval);
  21binmode STDOUT, ':utf8';
  22
  23our $t0 = [ gettimeofday() ];
  24our $number_of_git_cmds = 0;
  25
  26BEGIN {
  27        CGI->compile() if $ENV{'MOD_PERL'};
  28}
  29
  30our $version = "++GIT_VERSION++";
  31
  32our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33sub evaluate_uri {
  34        our $cgi;
  35
  36        our $my_url = $cgi->url();
  37        our $my_uri = $cgi->url(-absolute => 1);
  38
  39        # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40        # needed and used only for URLs with nonempty PATH_INFO
  41        our $base_url = $my_url;
  42
  43        # When the script is used as DirectoryIndex, the URL does not contain the name
  44        # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45        # have to do it ourselves. We make $path_info global because it's also used
  46        # later on.
  47        #
  48        # Another issue with the script being the DirectoryIndex is that the resulting
  49        # $my_url data is not the full script URL: this is good, because we want
  50        # generated links to keep implying the script name if it wasn't explicitly
  51        # indicated in the URL we're handling, but it means that $my_url cannot be used
  52        # as base URL.
  53        # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54        # to build the base URL ourselves:
  55        our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56        if ($path_info) {
  57                # $path_info has already been URL-decoded by the web server, but
  58                # $my_url and $my_uri have not. URL-decode them so we can properly
  59                # strip $path_info.
  60                $my_url = unescape($my_url);
  61                $my_uri = unescape($my_uri);
  62                if ($my_url =~ s,\Q$path_info\E$,, &&
  63                    $my_uri =~ s,\Q$path_info\E$,, &&
  64                    defined $ENV{'SCRIPT_NAME'}) {
  65                        $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                }
  67        }
  68
  69        # target of the home link on top of all pages
  70        our $home_link = $my_uri || "/";
  71}
  72
  73# core git executable to use
  74# this can just be "git" if your webserver has a sensible PATH
  75our $GIT = "++GIT_BINDIR++/git";
  76
  77# absolute fs-path which will be prepended to the project path
  78#our $projectroot = "/pub/scm";
  79our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81# fs traversing limit for getting project list
  82# the number is relative to the projectroot
  83our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85# string of the home link on top of all pages
  86our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  87
  88# name of your site or organization to appear in page titles
  89# replace this with something more descriptive for clearer bookmarks
  90our $site_name = "++GITWEB_SITENAME++"
  91                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93# html snippet to include in the <head> section of each page
  94our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95# filename of html text to include at top of each page
  96our $site_header = "++GITWEB_SITE_HEADER++";
  97# html text to include at home page
  98our $home_text = "++GITWEB_HOMETEXT++";
  99# filename of html text to include at bottom of each page
 100our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102# URI of stylesheets
 103our @stylesheets = ("++GITWEB_CSS++");
 104# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105our $stylesheet = undef;
 106# URI of GIT logo (72x27 size)
 107our $logo = "++GITWEB_LOGO++";
 108# URI of GIT favicon, assumed to be image/png type
 109our $favicon = "++GITWEB_FAVICON++";
 110# URI of gitweb.js (JavaScript code for gitweb)
 111our $javascript = "++GITWEB_JS++";
 112
 113# URI and label (title) of GIT logo link
 114#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115#our $logo_label = "git documentation";
 116our $logo_url = "http://git-scm.com/";
 117our $logo_label = "git homepage";
 118
 119# source of projects list
 120our $projects_list = "++GITWEB_LIST++";
 121
 122# the width (in characters) of the projects list "Description" column
 123our $projects_list_description_width = 25;
 124
 125# group projects by category on the projects list
 126# (enabled if this variable evaluates to true)
 127our $projects_list_group_categories = 0;
 128
 129# default category if none specified
 130# (leave the empty string for no category)
 131our $project_list_default_category = "";
 132
 133# default order of projects list
 134# valid values are none, project, descr, owner, and age
 135our $default_projects_order = "project";
 136
 137# show repository only if this file exists
 138# (only effective if this variable evaluates to true)
 139our $export_ok = "++GITWEB_EXPORT_OK++";
 140
 141# don't generate age column on the projects list page
 142our $omit_age_column = 0;
 143
 144# don't generate information about owners of repositories
 145our $omit_owner=0;
 146
 147# show repository only if this subroutine returns true
 148# when given the path to the project, for example:
 149#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 150our $export_auth_hook = undef;
 151
 152# only allow viewing of repositories also shown on the overview page
 153our $strict_export = "++GITWEB_STRICT_EXPORT++";
 154
 155# list of git base URLs used for URL to where fetch project from,
 156# i.e. full URL is "$git_base_url/$project"
 157our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 158
 159# default blob_plain mimetype and default charset for text/plain blob
 160our $default_blob_plain_mimetype = 'text/plain';
 161our $default_text_plain_charset  = undef;
 162
 163# file to use for guessing MIME types before trying /etc/mime.types
 164# (relative to the current git repository)
 165our $mimetypes_file = undef;
 166
 167# assume this charset if line contains non-UTF-8 characters;
 168# it should be valid encoding (see Encoding::Supported(3pm) for list),
 169# for which encoding all byte sequences are valid, for example
 170# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 171# could be even 'utf-8' for the old behavior)
 172our $fallback_encoding = 'latin1';
 173
 174# rename detection options for git-diff and git-diff-tree
 175# - default is '-M', with the cost proportional to
 176#   (number of removed files) * (number of new files).
 177# - more costly is '-C' (which implies '-M'), with the cost proportional to
 178#   (number of changed files + number of removed files) * (number of new files)
 179# - even more costly is '-C', '--find-copies-harder' with cost
 180#   (number of files in the original tree) * (number of new files)
 181# - one might want to include '-B' option, e.g. '-B', '-M'
 182our @diff_opts = ('-M'); # taken from git_commit
 183
 184# Disables features that would allow repository owners to inject script into
 185# the gitweb domain.
 186our $prevent_xss = 0;
 187
 188# Path to the highlight executable to use (must be the one from
 189# http://www.andre-simon.de due to assumptions about parameters and output).
 190# Useful if highlight is not installed on your webserver's PATH.
 191# [Default: highlight]
 192our $highlight_bin = "++HIGHLIGHT_BIN++";
 193
 194# information about snapshot formats that gitweb is capable of serving
 195our %known_snapshot_formats = (
 196        # name => {
 197        #       'display' => display name,
 198        #       'type' => mime type,
 199        #       'suffix' => filename suffix,
 200        #       'format' => --format for git-archive,
 201        #       'compressor' => [compressor command and arguments]
 202        #                       (array reference, optional)
 203        #       'disabled' => boolean (optional)}
 204        #
 205        'tgz' => {
 206                'display' => 'tar.gz',
 207                'type' => 'application/x-gzip',
 208                'suffix' => '.tar.gz',
 209                'format' => 'tar',
 210                'compressor' => ['gzip', '-n']},
 211
 212        'tbz2' => {
 213                'display' => 'tar.bz2',
 214                'type' => 'application/x-bzip2',
 215                'suffix' => '.tar.bz2',
 216                'format' => 'tar',
 217                'compressor' => ['bzip2']},
 218
 219        'txz' => {
 220                'display' => 'tar.xz',
 221                'type' => 'application/x-xz',
 222                'suffix' => '.tar.xz',
 223                'format' => 'tar',
 224                'compressor' => ['xz'],
 225                'disabled' => 1},
 226
 227        'zip' => {
 228                'display' => 'zip',
 229                'type' => 'application/x-zip',
 230                'suffix' => '.zip',
 231                'format' => 'zip'},
 232);
 233
 234# Aliases so we understand old gitweb.snapshot values in repository
 235# configuration.
 236our %known_snapshot_format_aliases = (
 237        'gzip'  => 'tgz',
 238        'bzip2' => 'tbz2',
 239        'xz'    => 'txz',
 240
 241        # backward compatibility: legacy gitweb config support
 242        'x-gzip' => undef, 'gz' => undef,
 243        'x-bzip2' => undef, 'bz2' => undef,
 244        'x-zip' => undef, '' => undef,
 245);
 246
 247# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 248# are changed, it may be appropriate to change these values too via
 249# $GITWEB_CONFIG.
 250our %avatar_size = (
 251        'default' => 16,
 252        'double'  => 32
 253);
 254
 255# Used to set the maximum load that we will still respond to gitweb queries.
 256# If server load exceed this value then return "503 server busy" error.
 257# If gitweb cannot determined server load, it is taken to be 0.
 258# Leave it undefined (or set to 'undef') to turn off load checking.
 259our $maxload = 300;
 260
 261# configuration for 'highlight' (http://www.andre-simon.de/)
 262# match by basename
 263our %highlight_basename = (
 264        #'Program' => 'py',
 265        #'Library' => 'py',
 266        'SConstruct' => 'py', # SCons equivalent of Makefile
 267        'Makefile' => 'make',
 268);
 269# match by extension
 270our %highlight_ext = (
 271        # main extensions, defining name of syntax;
 272        # see files in /usr/share/highlight/langDefs/ directory
 273        map { $_ => $_ }
 274                qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 275        # alternate extensions, see /etc/highlight/filetypes.conf
 276        'h' => 'c',
 277        map { $_ => 'sh'  } qw(bash zsh ksh),
 278        map { $_ => 'cpp' } qw(cxx c++ cc),
 279        map { $_ => 'php' } qw(php3 php4 php5 phps),
 280        map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 281        map { $_ => 'make'} qw(mak mk),
 282        map { $_ => 'xml' } qw(xhtml html htm),
 283);
 284
 285# You define site-wide feature defaults here; override them with
 286# $GITWEB_CONFIG as necessary.
 287our %feature = (
 288        # feature => {
 289        #       'sub' => feature-sub (subroutine),
 290        #       'override' => allow-override (boolean),
 291        #       'default' => [ default options...] (array reference)}
 292        #
 293        # if feature is overridable (it means that allow-override has true value),
 294        # then feature-sub will be called with default options as parameters;
 295        # return value of feature-sub indicates if to enable specified feature
 296        #
 297        # if there is no 'sub' key (no feature-sub), then feature cannot be
 298        # overridden
 299        #
 300        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 301        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 302        # is enabled
 303
 304        # Enable the 'blame' blob view, showing the last commit that modified
 305        # each line in the file. This can be very CPU-intensive.
 306
 307        # To enable system wide have in $GITWEB_CONFIG
 308        # $feature{'blame'}{'default'} = [1];
 309        # To have project specific config enable override in $GITWEB_CONFIG
 310        # $feature{'blame'}{'override'} = 1;
 311        # and in project config gitweb.blame = 0|1;
 312        'blame' => {
 313                'sub' => sub { feature_bool('blame', @_) },
 314                'override' => 0,
 315                'default' => [0]},
 316
 317        # Enable the 'snapshot' link, providing a compressed archive of any
 318        # tree. This can potentially generate high traffic if you have large
 319        # project.
 320
 321        # Value is a list of formats defined in %known_snapshot_formats that
 322        # you wish to offer.
 323        # To disable system wide have in $GITWEB_CONFIG
 324        # $feature{'snapshot'}{'default'} = [];
 325        # To have project specific config enable override in $GITWEB_CONFIG
 326        # $feature{'snapshot'}{'override'} = 1;
 327        # and in project config, a comma-separated list of formats or "none"
 328        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 329        'snapshot' => {
 330                'sub' => \&feature_snapshot,
 331                'override' => 0,
 332                'default' => ['tgz']},
 333
 334        # Enable text search, which will list the commits which match author,
 335        # committer or commit text to a given string.  Enabled by default.
 336        # Project specific override is not supported.
 337        #
 338        # Note that this controls all search features, which means that if
 339        # it is disabled, then 'grep' and 'pickaxe' search would also be
 340        # disabled.
 341        'search' => {
 342                'override' => 0,
 343                'default' => [1]},
 344
 345        # Enable grep search, which will list the files in currently selected
 346        # tree containing the given string. Enabled by default. This can be
 347        # potentially CPU-intensive, of course.
 348        # Note that you need to have 'search' feature enabled too.
 349
 350        # To enable system wide have in $GITWEB_CONFIG
 351        # $feature{'grep'}{'default'} = [1];
 352        # To have project specific config enable override in $GITWEB_CONFIG
 353        # $feature{'grep'}{'override'} = 1;
 354        # and in project config gitweb.grep = 0|1;
 355        'grep' => {
 356                'sub' => sub { feature_bool('grep', @_) },
 357                'override' => 0,
 358                'default' => [1]},
 359
 360        # Enable the pickaxe search, which will list the commits that modified
 361        # a given string in a file. This can be practical and quite faster
 362        # alternative to 'blame', but still potentially CPU-intensive.
 363        # Note that you need to have 'search' feature enabled too.
 364
 365        # To enable system wide have in $GITWEB_CONFIG
 366        # $feature{'pickaxe'}{'default'} = [1];
 367        # To have project specific config enable override in $GITWEB_CONFIG
 368        # $feature{'pickaxe'}{'override'} = 1;
 369        # and in project config gitweb.pickaxe = 0|1;
 370        'pickaxe' => {
 371                'sub' => sub { feature_bool('pickaxe', @_) },
 372                'override' => 0,
 373                'default' => [1]},
 374
 375        # Enable showing size of blobs in a 'tree' view, in a separate
 376        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 377
 378        # To disable system wide have in $GITWEB_CONFIG
 379        # $feature{'show-sizes'}{'default'} = [0];
 380        # To have project specific config enable override in $GITWEB_CONFIG
 381        # $feature{'show-sizes'}{'override'} = 1;
 382        # and in project config gitweb.showsizes = 0|1;
 383        'show-sizes' => {
 384                'sub' => sub { feature_bool('showsizes', @_) },
 385                'override' => 0,
 386                'default' => [1]},
 387
 388        # Make gitweb use an alternative format of the URLs which can be
 389        # more readable and natural-looking: project name is embedded
 390        # directly in the path and the query string contains other
 391        # auxiliary information. All gitweb installations recognize
 392        # URL in either format; this configures in which formats gitweb
 393        # generates links.
 394
 395        # To enable system wide have in $GITWEB_CONFIG
 396        # $feature{'pathinfo'}{'default'} = [1];
 397        # Project specific override is not supported.
 398
 399        # Note that you will need to change the default location of CSS,
 400        # favicon, logo and possibly other files to an absolute URL. Also,
 401        # if gitweb.cgi serves as your indexfile, you will need to force
 402        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 403        'pathinfo' => {
 404                'override' => 0,
 405                'default' => [0]},
 406
 407        # Make gitweb consider projects in project root subdirectories
 408        # to be forks of existing projects. Given project $projname.git,
 409        # projects matching $projname/*.git will not be shown in the main
 410        # projects list, instead a '+' mark will be added to $projname
 411        # there and a 'forks' view will be enabled for the project, listing
 412        # all the forks. If project list is taken from a file, forks have
 413        # to be listed after the main project.
 414
 415        # To enable system wide have in $GITWEB_CONFIG
 416        # $feature{'forks'}{'default'} = [1];
 417        # Project specific override is not supported.
 418        'forks' => {
 419                'override' => 0,
 420                'default' => [0]},
 421
 422        # Insert custom links to the action bar of all project pages.
 423        # This enables you mainly to link to third-party scripts integrating
 424        # into gitweb; e.g. git-browser for graphical history representation
 425        # or custom web-based repository administration interface.
 426
 427        # The 'default' value consists of a list of triplets in the form
 428        # (label, link, position) where position is the label after which
 429        # to insert the link and link is a format string where %n expands
 430        # to the project name, %f to the project path within the filesystem,
 431        # %h to the current hash (h gitweb parameter) and %b to the current
 432        # hash base (hb gitweb parameter); %% expands to %.
 433
 434        # To enable system wide have in $GITWEB_CONFIG e.g.
 435        # $feature{'actions'}{'default'} = [('graphiclog',
 436        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 437        # Project specific override is not supported.
 438        'actions' => {
 439                'override' => 0,
 440                'default' => []},
 441
 442        # Allow gitweb scan project content tags of project repository,
 443        # and display the popular Web 2.0-ish "tag cloud" near the projects
 444        # list.  Note that this is something COMPLETELY different from the
 445        # normal Git tags.
 446
 447        # gitweb by itself can show existing tags, but it does not handle
 448        # tagging itself; you need to do it externally, outside gitweb.
 449        # The format is described in git_get_project_ctags() subroutine.
 450        # You may want to install the HTML::TagCloud Perl module to get
 451        # a pretty tag cloud instead of just a list of tags.
 452
 453        # To enable system wide have in $GITWEB_CONFIG
 454        # $feature{'ctags'}{'default'} = [1];
 455        # Project specific override is not supported.
 456
 457        # In the future whether ctags editing is enabled might depend
 458        # on the value, but using 1 should always mean no editing of ctags.
 459        'ctags' => {
 460                'override' => 0,
 461                'default' => [0]},
 462
 463        # The maximum number of patches in a patchset generated in patch
 464        # view. Set this to 0 or undef to disable patch view, or to a
 465        # negative number to remove any limit.
 466
 467        # To disable system wide have in $GITWEB_CONFIG
 468        # $feature{'patches'}{'default'} = [0];
 469        # To have project specific config enable override in $GITWEB_CONFIG
 470        # $feature{'patches'}{'override'} = 1;
 471        # and in project config gitweb.patches = 0|n;
 472        # where n is the maximum number of patches allowed in a patchset.
 473        'patches' => {
 474                'sub' => \&feature_patches,
 475                'override' => 0,
 476                'default' => [16]},
 477
 478        # Avatar support. When this feature is enabled, views such as
 479        # shortlog or commit will display an avatar associated with
 480        # the email of the committer(s) and/or author(s).
 481
 482        # Currently available providers are gravatar and picon.
 483        # If an unknown provider is specified, the feature is disabled.
 484
 485        # Gravatar depends on Digest::MD5.
 486        # Picon currently relies on the indiana.edu database.
 487
 488        # To enable system wide have in $GITWEB_CONFIG
 489        # $feature{'avatar'}{'default'} = ['<provider>'];
 490        # where <provider> is either gravatar or picon.
 491        # To have project specific config enable override in $GITWEB_CONFIG
 492        # $feature{'avatar'}{'override'} = 1;
 493        # and in project config gitweb.avatar = <provider>;
 494        'avatar' => {
 495                'sub' => \&feature_avatar,
 496                'override' => 0,
 497                'default' => ['']},
 498
 499        # Enable displaying how much time and how many git commands
 500        # it took to generate and display page.  Disabled by default.
 501        # Project specific override is not supported.
 502        'timed' => {
 503                'override' => 0,
 504                'default' => [0]},
 505
 506        # Enable turning some links into links to actions which require
 507        # JavaScript to run (like 'blame_incremental').  Not enabled by
 508        # default.  Project specific override is currently not supported.
 509        'javascript-actions' => {
 510                'override' => 0,
 511                'default' => [0]},
 512
 513        # Enable and configure ability to change common timezone for dates
 514        # in gitweb output via JavaScript.  Enabled by default.
 515        # Project specific override is not supported.
 516        'javascript-timezone' => {
 517                'override' => 0,
 518                'default' => [
 519                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 520                                     # or undef to turn off this feature
 521                        'gitweb_tz', # name of cookie where to store selected timezone
 522                        'datetime',  # CSS class used to mark up dates for manipulation
 523                ]},
 524
 525        # Syntax highlighting support. This is based on Daniel Svensson's
 526        # and Sham Chukoury's work in gitweb-xmms2.git.
 527        # It requires the 'highlight' program present in $PATH,
 528        # and therefore is disabled by default.
 529
 530        # To enable system wide have in $GITWEB_CONFIG
 531        # $feature{'highlight'}{'default'} = [1];
 532
 533        'highlight' => {
 534                'sub' => sub { feature_bool('highlight', @_) },
 535                'override' => 0,
 536                'default' => [0]},
 537
 538        # Enable displaying of remote heads in the heads list
 539
 540        # To enable system wide have in $GITWEB_CONFIG
 541        # $feature{'remote_heads'}{'default'} = [1];
 542        # To have project specific config enable override in $GITWEB_CONFIG
 543        # $feature{'remote_heads'}{'override'} = 1;
 544        # and in project config gitweb.remote_heads = 0|1;
 545        'remote_heads' => {
 546                'sub' => sub { feature_bool('remote_heads', @_) },
 547                'override' => 0,
 548                'default' => [0]},
 549);
 550
 551sub gitweb_get_feature {
 552        my ($name) = @_;
 553        return unless exists $feature{$name};
 554        my ($sub, $override, @defaults) = (
 555                $feature{$name}{'sub'},
 556                $feature{$name}{'override'},
 557                @{$feature{$name}{'default'}});
 558        # project specific override is possible only if we have project
 559        our $git_dir; # global variable, declared later
 560        if (!$override || !defined $git_dir) {
 561                return @defaults;
 562        }
 563        if (!defined $sub) {
 564                warn "feature $name is not overridable";
 565                return @defaults;
 566        }
 567        return $sub->(@defaults);
 568}
 569
 570# A wrapper to check if a given feature is enabled.
 571# With this, you can say
 572#
 573#   my $bool_feat = gitweb_check_feature('bool_feat');
 574#   gitweb_check_feature('bool_feat') or somecode;
 575#
 576# instead of
 577#
 578#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 579#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 580#
 581sub gitweb_check_feature {
 582        return (gitweb_get_feature(@_))[0];
 583}
 584
 585
 586sub feature_bool {
 587        my $key = shift;
 588        my ($val) = git_get_project_config($key, '--bool');
 589
 590        if (!defined $val) {
 591                return ($_[0]);
 592        } elsif ($val eq 'true') {
 593                return (1);
 594        } elsif ($val eq 'false') {
 595                return (0);
 596        }
 597}
 598
 599sub feature_snapshot {
 600        my (@fmts) = @_;
 601
 602        my ($val) = git_get_project_config('snapshot');
 603
 604        if ($val) {
 605                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 606        }
 607
 608        return @fmts;
 609}
 610
 611sub feature_patches {
 612        my @val = (git_get_project_config('patches', '--int'));
 613
 614        if (@val) {
 615                return @val;
 616        }
 617
 618        return ($_[0]);
 619}
 620
 621sub feature_avatar {
 622        my @val = (git_get_project_config('avatar'));
 623
 624        return @val ? @val : @_;
 625}
 626
 627# checking HEAD file with -e is fragile if the repository was
 628# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 629# and then pruned.
 630sub check_head_link {
 631        my ($dir) = @_;
 632        my $headfile = "$dir/HEAD";
 633        return ((-e $headfile) ||
 634                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 635}
 636
 637sub check_export_ok {
 638        my ($dir) = @_;
 639        return (check_head_link($dir) &&
 640                (!$export_ok || -e "$dir/$export_ok") &&
 641                (!$export_auth_hook || $export_auth_hook->($dir)));
 642}
 643
 644# process alternate names for backward compatibility
 645# filter out unsupported (unknown) snapshot formats
 646sub filter_snapshot_fmts {
 647        my @fmts = @_;
 648
 649        @fmts = map {
 650                exists $known_snapshot_format_aliases{$_} ?
 651                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 652        @fmts = grep {
 653                exists $known_snapshot_formats{$_} &&
 654                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 655}
 656
 657# If it is set to code reference, it is code that it is to be run once per
 658# request, allowing updating configurations that change with each request,
 659# while running other code in config file only once.
 660#
 661# Otherwise, if it is false then gitweb would process config file only once;
 662# if it is true then gitweb config would be run for each request.
 663our $per_request_config = 1;
 664
 665# read and parse gitweb config file given by its parameter.
 666# returns true on success, false on recoverable error, allowing
 667# to chain this subroutine, using first file that exists.
 668# dies on errors during parsing config file, as it is unrecoverable.
 669sub read_config_file {
 670        my $filename = shift;
 671        return unless defined $filename;
 672        # die if there are errors parsing config file
 673        if (-e $filename) {
 674                do $filename;
 675                die $@ if $@;
 676                return 1;
 677        }
 678        return;
 679}
 680
 681our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 682sub evaluate_gitweb_config {
 683        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 684        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 685        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 686
 687        # Protect agains duplications of file names, to not read config twice.
 688        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 689        # there possibility of duplication of filename there doesn't matter.
 690        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 691        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 692
 693        # Common system-wide settings for convenience.
 694        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 695        read_config_file($GITWEB_CONFIG_COMMON);
 696
 697        # Use first config file that exists.  This means use the per-instance
 698        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 699        read_config_file($GITWEB_CONFIG) and return;
 700        read_config_file($GITWEB_CONFIG_SYSTEM);
 701}
 702
 703# Get loadavg of system, to compare against $maxload.
 704# Currently it requires '/proc/loadavg' present to get loadavg;
 705# if it is not present it returns 0, which means no load checking.
 706sub get_loadavg {
 707        if( -e '/proc/loadavg' ){
 708                open my $fd, '<', '/proc/loadavg'
 709                        or return 0;
 710                my @load = split(/\s+/, scalar <$fd>);
 711                close $fd;
 712
 713                # The first three columns measure CPU and IO utilization of the last one,
 714                # five, and 10 minute periods.  The fourth column shows the number of
 715                # currently running processes and the total number of processes in the m/n
 716                # format.  The last column displays the last process ID used.
 717                return $load[0] || 0;
 718        }
 719        # additional checks for load average should go here for things that don't export
 720        # /proc/loadavg
 721
 722        return 0;
 723}
 724
 725# version of the core git binary
 726our $git_version;
 727sub evaluate_git_version {
 728        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 729        $number_of_git_cmds++;
 730}
 731
 732sub check_loadavg {
 733        if (defined $maxload && get_loadavg() > $maxload) {
 734                die_error(503, "The load average on the server is too high");
 735        }
 736}
 737
 738# ======================================================================
 739# input validation and dispatch
 740
 741# input parameters can be collected from a variety of sources (presently, CGI
 742# and PATH_INFO), so we define an %input_params hash that collects them all
 743# together during validation: this allows subsequent uses (e.g. href()) to be
 744# agnostic of the parameter origin
 745
 746our %input_params = ();
 747
 748# input parameters are stored with the long parameter name as key. This will
 749# also be used in the href subroutine to convert parameters to their CGI
 750# equivalent, and since the href() usage is the most frequent one, we store
 751# the name -> CGI key mapping here, instead of the reverse.
 752#
 753# XXX: Warning: If you touch this, check the search form for updating,
 754# too.
 755
 756our @cgi_param_mapping = (
 757        project => "p",
 758        action => "a",
 759        file_name => "f",
 760        file_parent => "fp",
 761        hash => "h",
 762        hash_parent => "hp",
 763        hash_base => "hb",
 764        hash_parent_base => "hpb",
 765        page => "pg",
 766        order => "o",
 767        searchtext => "s",
 768        searchtype => "st",
 769        snapshot_format => "sf",
 770        extra_options => "opt",
 771        search_use_regexp => "sr",
 772        ctag => "by_tag",
 773        diff_style => "ds",
 774        project_filter => "pf",
 775        # this must be last entry (for manipulation from JavaScript)
 776        javascript => "js"
 777);
 778our %cgi_param_mapping = @cgi_param_mapping;
 779
 780# we will also need to know the possible actions, for validation
 781our %actions = (
 782        "blame" => \&git_blame,
 783        "blame_incremental" => \&git_blame_incremental,
 784        "blame_data" => \&git_blame_data,
 785        "blobdiff" => \&git_blobdiff,
 786        "blobdiff_plain" => \&git_blobdiff_plain,
 787        "blob" => \&git_blob,
 788        "blob_plain" => \&git_blob_plain,
 789        "commitdiff" => \&git_commitdiff,
 790        "commitdiff_plain" => \&git_commitdiff_plain,
 791        "commit" => \&git_commit,
 792        "forks" => \&git_forks,
 793        "heads" => \&git_heads,
 794        "history" => \&git_history,
 795        "log" => \&git_log,
 796        "patch" => \&git_patch,
 797        "patches" => \&git_patches,
 798        "remotes" => \&git_remotes,
 799        "rss" => \&git_rss,
 800        "atom" => \&git_atom,
 801        "search" => \&git_search,
 802        "search_help" => \&git_search_help,
 803        "shortlog" => \&git_shortlog,
 804        "summary" => \&git_summary,
 805        "tag" => \&git_tag,
 806        "tags" => \&git_tags,
 807        "tree" => \&git_tree,
 808        "snapshot" => \&git_snapshot,
 809        "object" => \&git_object,
 810        # those below don't need $project
 811        "opml" => \&git_opml,
 812        "project_list" => \&git_project_list,
 813        "project_index" => \&git_project_index,
 814);
 815
 816# finally, we have the hash of allowed extra_options for the commands that
 817# allow them
 818our %allowed_options = (
 819        "--no-merges" => [ qw(rss atom log shortlog history) ],
 820);
 821
 822# fill %input_params with the CGI parameters. All values except for 'opt'
 823# should be single values, but opt can be an array. We should probably
 824# build an array of parameters that can be multi-valued, but since for the time
 825# being it's only this one, we just single it out
 826sub evaluate_query_params {
 827        our $cgi;
 828
 829        while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                if ($symbol eq 'opt') {
 831                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 832                } else {
 833                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 834                }
 835        }
 836}
 837
 838# now read PATH_INFO and update the parameter list for missing parameters
 839sub evaluate_path_info {
 840        return if defined $input_params{'project'};
 841        return if !$path_info;
 842        $path_info =~ s,^/+,,;
 843        return if !$path_info;
 844
 845        # find which part of PATH_INFO is project
 846        my $project = $path_info;
 847        $project =~ s,/+$,,;
 848        while ($project && !check_head_link("$projectroot/$project")) {
 849                $project =~ s,/*[^/]*$,,;
 850        }
 851        return unless $project;
 852        $input_params{'project'} = $project;
 853
 854        # do not change any parameters if an action is given using the query string
 855        return if $input_params{'action'};
 856        $path_info =~ s,^\Q$project\E/*,,;
 857
 858        # next, check if we have an action
 859        my $action = $path_info;
 860        $action =~ s,/.*$,,;
 861        if (exists $actions{$action}) {
 862                $path_info =~ s,^$action/*,,;
 863                $input_params{'action'} = $action;
 864        }
 865
 866        # list of actions that want hash_base instead of hash, but can have no
 867        # pathname (f) parameter
 868        my @wants_base = (
 869                'tree',
 870                'history',
 871        );
 872
 873        # we want to catch, among others
 874        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 875        my ($parentrefname, $parentpathname, $refname, $pathname) =
 876                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 877
 878        # first, analyze the 'current' part
 879        if (defined $pathname) {
 880                # we got "branch:filename" or "branch:dir/"
 881                # we could use git_get_type(branch:pathname), but:
 882                # - it needs $git_dir
 883                # - it does a git() call
 884                # - the convention of terminating directories with a slash
 885                #   makes it superfluous
 886                # - embedding the action in the PATH_INFO would make it even
 887                #   more superfluous
 888                $pathname =~ s,^/+,,;
 889                if (!$pathname || substr($pathname, -1) eq "/") {
 890                        $input_params{'action'} ||= "tree";
 891                        $pathname =~ s,/$,,;
 892                } else {
 893                        # the default action depends on whether we had parent info
 894                        # or not
 895                        if ($parentrefname) {
 896                                $input_params{'action'} ||= "blobdiff_plain";
 897                        } else {
 898                                $input_params{'action'} ||= "blob_plain";
 899                        }
 900                }
 901                $input_params{'hash_base'} ||= $refname;
 902                $input_params{'file_name'} ||= $pathname;
 903        } elsif (defined $refname) {
 904                # we got "branch". In this case we have to choose if we have to
 905                # set hash or hash_base.
 906                #
 907                # Most of the actions without a pathname only want hash to be
 908                # set, except for the ones specified in @wants_base that want
 909                # hash_base instead. It should also be noted that hand-crafted
 910                # links having 'history' as an action and no pathname or hash
 911                # set will fail, but that happens regardless of PATH_INFO.
 912                if (defined $parentrefname) {
 913                        # if there is parent let the default be 'shortlog' action
 914                        # (for http://git.example.com/repo.git/A..B links); if there
 915                        # is no parent, dispatch will detect type of object and set
 916                        # action appropriately if required (if action is not set)
 917                        $input_params{'action'} ||= "shortlog";
 918                }
 919                if ($input_params{'action'} &&
 920                    grep { $_ eq $input_params{'action'} } @wants_base) {
 921                        $input_params{'hash_base'} ||= $refname;
 922                } else {
 923                        $input_params{'hash'} ||= $refname;
 924                }
 925        }
 926
 927        # next, handle the 'parent' part, if present
 928        if (defined $parentrefname) {
 929                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 930                # someproject/blobdiff/oldrev..newrev:/filename
 931                if ($parentpathname) {
 932                        $parentpathname =~ s,^/+,,;
 933                        $parentpathname =~ s,/$,,;
 934                        $input_params{'file_parent'} ||= $parentpathname;
 935                } else {
 936                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 937                }
 938                # we assume that hash_parent_base is wanted if a path was specified,
 939                # or if the action wants hash_base instead of hash
 940                if (defined $input_params{'file_parent'} ||
 941                        grep { $_ eq $input_params{'action'} } @wants_base) {
 942                        $input_params{'hash_parent_base'} ||= $parentrefname;
 943                } else {
 944                        $input_params{'hash_parent'} ||= $parentrefname;
 945                }
 946        }
 947
 948        # for the snapshot action, we allow URLs in the form
 949        # $project/snapshot/$hash.ext
 950        # where .ext determines the snapshot and gets removed from the
 951        # passed $refname to provide the $hash.
 952        #
 953        # To be able to tell that $refname includes the format extension, we
 954        # require the following two conditions to be satisfied:
 955        # - the hash input parameter MUST have been set from the $refname part
 956        #   of the URL (i.e. they must be equal)
 957        # - the snapshot format MUST NOT have been defined already (e.g. from
 958        #   CGI parameter sf)
 959        # It's also useless to try any matching unless $refname has a dot,
 960        # so we check for that too
 961        if (defined $input_params{'action'} &&
 962                $input_params{'action'} eq 'snapshot' &&
 963                defined $refname && index($refname, '.') != -1 &&
 964                $refname eq $input_params{'hash'} &&
 965                !defined $input_params{'snapshot_format'}) {
 966                # We loop over the known snapshot formats, checking for
 967                # extensions. Allowed extensions are both the defined suffix
 968                # (which includes the initial dot already) and the snapshot
 969                # format key itself, with a prepended dot
 970                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 971                        my $hash = $refname;
 972                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 973                                next;
 974                        }
 975                        my $sfx = $1;
 976                        # a valid suffix was found, so set the snapshot format
 977                        # and reset the hash parameter
 978                        $input_params{'snapshot_format'} = $fmt;
 979                        $input_params{'hash'} = $hash;
 980                        # we also set the format suffix to the one requested
 981                        # in the URL: this way a request for e.g. .tgz returns
 982                        # a .tgz instead of a .tar.gz
 983                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 984                        last;
 985                }
 986        }
 987}
 988
 989our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 990     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 991     $searchtext, $search_regexp, $project_filter);
 992sub evaluate_and_validate_params {
 993        our $action = $input_params{'action'};
 994        if (defined $action) {
 995                if (!validate_action($action)) {
 996                        die_error(400, "Invalid action parameter");
 997                }
 998        }
 999
1000        # parameters which are pathnames
1001        our $project = $input_params{'project'};
1002        if (defined $project) {
1003                if (!validate_project($project)) {
1004                        undef $project;
1005                        die_error(404, "No such project");
1006                }
1007        }
1008
1009        our $project_filter = $input_params{'project_filter'};
1010        if (defined $project_filter) {
1011                if (!validate_pathname($project_filter)) {
1012                        die_error(404, "Invalid project_filter parameter");
1013                }
1014        }
1015
1016        our $file_name = $input_params{'file_name'};
1017        if (defined $file_name) {
1018                if (!validate_pathname($file_name)) {
1019                        die_error(400, "Invalid file parameter");
1020                }
1021        }
1022
1023        our $file_parent = $input_params{'file_parent'};
1024        if (defined $file_parent) {
1025                if (!validate_pathname($file_parent)) {
1026                        die_error(400, "Invalid file parent parameter");
1027                }
1028        }
1029
1030        # parameters which are refnames
1031        our $hash = $input_params{'hash'};
1032        if (defined $hash) {
1033                if (!validate_refname($hash)) {
1034                        die_error(400, "Invalid hash parameter");
1035                }
1036        }
1037
1038        our $hash_parent = $input_params{'hash_parent'};
1039        if (defined $hash_parent) {
1040                if (!validate_refname($hash_parent)) {
1041                        die_error(400, "Invalid hash parent parameter");
1042                }
1043        }
1044
1045        our $hash_base = $input_params{'hash_base'};
1046        if (defined $hash_base) {
1047                if (!validate_refname($hash_base)) {
1048                        die_error(400, "Invalid hash base parameter");
1049                }
1050        }
1051
1052        our @extra_options = @{$input_params{'extra_options'}};
1053        # @extra_options is always defined, since it can only be (currently) set from
1054        # CGI, and $cgi->param() returns the empty array in array context if the param
1055        # is not set
1056        foreach my $opt (@extra_options) {
1057                if (not exists $allowed_options{$opt}) {
1058                        die_error(400, "Invalid option parameter");
1059                }
1060                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1061                        die_error(400, "Invalid option parameter for this action");
1062                }
1063        }
1064
1065        our $hash_parent_base = $input_params{'hash_parent_base'};
1066        if (defined $hash_parent_base) {
1067                if (!validate_refname($hash_parent_base)) {
1068                        die_error(400, "Invalid hash parent base parameter");
1069                }
1070        }
1071
1072        # other parameters
1073        our $page = $input_params{'page'};
1074        if (defined $page) {
1075                if ($page =~ m/[^0-9]/) {
1076                        die_error(400, "Invalid page parameter");
1077                }
1078        }
1079
1080        our $searchtype = $input_params{'searchtype'};
1081        if (defined $searchtype) {
1082                if ($searchtype =~ m/[^a-z]/) {
1083                        die_error(400, "Invalid searchtype parameter");
1084                }
1085        }
1086
1087        our $search_use_regexp = $input_params{'search_use_regexp'};
1088
1089        our $searchtext = $input_params{'searchtext'};
1090        our $search_regexp;
1091        if (defined $searchtext) {
1092                if (length($searchtext) < 2) {
1093                        die_error(403, "At least two characters are required for search parameter");
1094                }
1095                if ($search_use_regexp) {
1096                        $search_regexp = $searchtext;
1097                        if (!eval { qr/$search_regexp/; 1; }) {
1098                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1099                                die_error(400, "Invalid search regexp '$search_regexp'",
1100                                          esc_html($error));
1101                        }
1102                } else {
1103                        $search_regexp = quotemeta $searchtext;
1104                }
1105        }
1106}
1107
1108# path to the current git repository
1109our $git_dir;
1110sub evaluate_git_dir {
1111        our $git_dir = "$projectroot/$project" if $project;
1112}
1113
1114our (@snapshot_fmts, $git_avatar);
1115sub configure_gitweb_features {
1116        # list of supported snapshot formats
1117        our @snapshot_fmts = gitweb_get_feature('snapshot');
1118        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1119
1120        # check that the avatar feature is set to a known provider name,
1121        # and for each provider check if the dependencies are satisfied.
1122        # if the provider name is invalid or the dependencies are not met,
1123        # reset $git_avatar to the empty string.
1124        our ($git_avatar) = gitweb_get_feature('avatar');
1125        if ($git_avatar eq 'gravatar') {
1126                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1127        } elsif ($git_avatar eq 'picon') {
1128                # no dependencies
1129        } else {
1130                $git_avatar = '';
1131        }
1132}
1133
1134# custom error handler: 'die <message>' is Internal Server Error
1135sub handle_errors_html {
1136        my $msg = shift; # it is already HTML escaped
1137
1138        # to avoid infinite loop where error occurs in die_error,
1139        # change handler to default handler, disabling handle_errors_html
1140        set_message("Error occured when inside die_error:\n$msg");
1141
1142        # you cannot jump out of die_error when called as error handler;
1143        # the subroutine set via CGI::Carp::set_message is called _after_
1144        # HTTP headers are already written, so it cannot write them itself
1145        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1146}
1147set_message(\&handle_errors_html);
1148
1149# dispatch
1150sub dispatch {
1151        if (!defined $action) {
1152                if (defined $hash) {
1153                        $action = git_get_type($hash);
1154                        $action or die_error(404, "Object does not exist");
1155                } elsif (defined $hash_base && defined $file_name) {
1156                        $action = git_get_type("$hash_base:$file_name");
1157                        $action or die_error(404, "File or directory does not exist");
1158                } elsif (defined $project) {
1159                        $action = 'summary';
1160                } else {
1161                        $action = 'project_list';
1162                }
1163        }
1164        if (!defined($actions{$action})) {
1165                die_error(400, "Unknown action");
1166        }
1167        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1168            !$project) {
1169                die_error(400, "Project needed");
1170        }
1171        $actions{$action}->();
1172}
1173
1174sub reset_timer {
1175        our $t0 = [ gettimeofday() ]
1176                if defined $t0;
1177        our $number_of_git_cmds = 0;
1178}
1179
1180our $first_request = 1;
1181sub run_request {
1182        reset_timer();
1183
1184        evaluate_uri();
1185        if ($first_request) {
1186                evaluate_gitweb_config();
1187                evaluate_git_version();
1188        }
1189        if ($per_request_config) {
1190                if (ref($per_request_config) eq 'CODE') {
1191                        $per_request_config->();
1192                } elsif (!$first_request) {
1193                        evaluate_gitweb_config();
1194                }
1195        }
1196        check_loadavg();
1197
1198        # $projectroot and $projects_list might be set in gitweb config file
1199        $projects_list ||= $projectroot;
1200
1201        evaluate_query_params();
1202        evaluate_path_info();
1203        evaluate_and_validate_params();
1204        evaluate_git_dir();
1205
1206        configure_gitweb_features();
1207
1208        dispatch();
1209}
1210
1211our $is_last_request = sub { 1 };
1212our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1213our $CGI = 'CGI';
1214our $cgi;
1215sub configure_as_fcgi {
1216        require CGI::Fast;
1217        our $CGI = 'CGI::Fast';
1218
1219        my $request_number = 0;
1220        # let each child service 100 requests
1221        our $is_last_request = sub { ++$request_number > 100 };
1222}
1223sub evaluate_argv {
1224        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1225        configure_as_fcgi()
1226                if $script_name =~ /\.fcgi$/;
1227
1228        return unless (@ARGV);
1229
1230        require Getopt::Long;
1231        Getopt::Long::GetOptions(
1232                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1233                'nproc|n=i' => sub {
1234                        my ($arg, $val) = @_;
1235                        return unless eval { require FCGI::ProcManager; 1; };
1236                        my $proc_manager = FCGI::ProcManager->new({
1237                                n_processes => $val,
1238                        });
1239                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1240                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1241                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1242                },
1243        );
1244}
1245
1246sub run {
1247        evaluate_argv();
1248
1249        $first_request = 1;
1250        $pre_listen_hook->()
1251                if $pre_listen_hook;
1252
1253 REQUEST:
1254        while ($cgi = $CGI->new()) {
1255                $pre_dispatch_hook->()
1256                        if $pre_dispatch_hook;
1257
1258                run_request();
1259
1260                $post_dispatch_hook->()
1261                        if $post_dispatch_hook;
1262                $first_request = 0;
1263
1264                last REQUEST if ($is_last_request->());
1265        }
1266
1267 DONE_GITWEB:
1268        1;
1269}
1270
1271run();
1272
1273if (defined caller) {
1274        # wrapped in a subroutine processing requests,
1275        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1276        return;
1277} else {
1278        # pure CGI script, serving single request
1279        exit;
1280}
1281
1282## ======================================================================
1283## action links
1284
1285# possible values of extra options
1286# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1287# -replay => 1      - start from a current view (replay with modifications)
1288# -path_info => 0|1 - don't use/use path_info URL (if possible)
1289# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1290sub href {
1291        my %params = @_;
1292        # default is to use -absolute url() i.e. $my_uri
1293        my $href = $params{-full} ? $my_url : $my_uri;
1294
1295        # implicit -replay, must be first of implicit params
1296        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1297
1298        $params{'project'} = $project unless exists $params{'project'};
1299
1300        if ($params{-replay}) {
1301                while (my ($name, $symbol) = each %cgi_param_mapping) {
1302                        if (!exists $params{$name}) {
1303                                $params{$name} = $input_params{$name};
1304                        }
1305                }
1306        }
1307
1308        my $use_pathinfo = gitweb_check_feature('pathinfo');
1309        if (defined $params{'project'} &&
1310            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1311                # try to put as many parameters as possible in PATH_INFO:
1312                #   - project name
1313                #   - action
1314                #   - hash_parent or hash_parent_base:/file_parent
1315                #   - hash or hash_base:/filename
1316                #   - the snapshot_format as an appropriate suffix
1317
1318                # When the script is the root DirectoryIndex for the domain,
1319                # $href here would be something like http://gitweb.example.com/
1320                # Thus, we strip any trailing / from $href, to spare us double
1321                # slashes in the final URL
1322                $href =~ s,/$,,;
1323
1324                # Then add the project name, if present
1325                $href .= "/".esc_path_info($params{'project'});
1326                delete $params{'project'};
1327
1328                # since we destructively absorb parameters, we keep this
1329                # boolean that remembers if we're handling a snapshot
1330                my $is_snapshot = $params{'action'} eq 'snapshot';
1331
1332                # Summary just uses the project path URL, any other action is
1333                # added to the URL
1334                if (defined $params{'action'}) {
1335                        $href .= "/".esc_path_info($params{'action'})
1336                                unless $params{'action'} eq 'summary';
1337                        delete $params{'action'};
1338                }
1339
1340                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1341                # stripping nonexistent or useless pieces
1342                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1343                        || $params{'hash_parent'} || $params{'hash'});
1344                if (defined $params{'hash_base'}) {
1345                        if (defined $params{'hash_parent_base'}) {
1346                                $href .= esc_path_info($params{'hash_parent_base'});
1347                                # skip the file_parent if it's the same as the file_name
1348                                if (defined $params{'file_parent'}) {
1349                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1350                                                delete $params{'file_parent'};
1351                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1352                                                $href .= ":/".esc_path_info($params{'file_parent'});
1353                                                delete $params{'file_parent'};
1354                                        }
1355                                }
1356                                $href .= "..";
1357                                delete $params{'hash_parent'};
1358                                delete $params{'hash_parent_base'};
1359                        } elsif (defined $params{'hash_parent'}) {
1360                                $href .= esc_path_info($params{'hash_parent'}). "..";
1361                                delete $params{'hash_parent'};
1362                        }
1363
1364                        $href .= esc_path_info($params{'hash_base'});
1365                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1366                                $href .= ":/".esc_path_info($params{'file_name'});
1367                                delete $params{'file_name'};
1368                        }
1369                        delete $params{'hash'};
1370                        delete $params{'hash_base'};
1371                } elsif (defined $params{'hash'}) {
1372                        $href .= esc_path_info($params{'hash'});
1373                        delete $params{'hash'};
1374                }
1375
1376                # If the action was a snapshot, we can absorb the
1377                # snapshot_format parameter too
1378                if ($is_snapshot) {
1379                        my $fmt = $params{'snapshot_format'};
1380                        # snapshot_format should always be defined when href()
1381                        # is called, but just in case some code forgets, we
1382                        # fall back to the default
1383                        $fmt ||= $snapshot_fmts[0];
1384                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1385                        delete $params{'snapshot_format'};
1386                }
1387        }
1388
1389        # now encode the parameters explicitly
1390        my @result = ();
1391        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1392                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1393                if (defined $params{$name}) {
1394                        if (ref($params{$name}) eq "ARRAY") {
1395                                foreach my $par (@{$params{$name}}) {
1396                                        push @result, $symbol . "=" . esc_param($par);
1397                                }
1398                        } else {
1399                                push @result, $symbol . "=" . esc_param($params{$name});
1400                        }
1401                }
1402        }
1403        $href .= "?" . join(';', @result) if scalar @result;
1404
1405        # final transformation: trailing spaces must be escaped (URI-encoded)
1406        $href =~ s/(\s+)$/CGI::escape($1)/e;
1407
1408        if ($params{-anchor}) {
1409                $href .= "#".esc_param($params{-anchor});
1410        }
1411
1412        return $href;
1413}
1414
1415
1416## ======================================================================
1417## validation, quoting/unquoting and escaping
1418
1419sub validate_action {
1420        my $input = shift || return undef;
1421        return undef unless exists $actions{$input};
1422        return $input;
1423}
1424
1425sub validate_project {
1426        my $input = shift || return undef;
1427        if (!validate_pathname($input) ||
1428                !(-d "$projectroot/$input") ||
1429                !check_export_ok("$projectroot/$input") ||
1430                ($strict_export && !project_in_list($input))) {
1431                return undef;
1432        } else {
1433                return $input;
1434        }
1435}
1436
1437sub validate_pathname {
1438        my $input = shift || return undef;
1439
1440        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1441        # at the beginning, at the end, and between slashes.
1442        # also this catches doubled slashes
1443        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1444                return undef;
1445        }
1446        # no null characters
1447        if ($input =~ m!\0!) {
1448                return undef;
1449        }
1450        return $input;
1451}
1452
1453sub validate_refname {
1454        my $input = shift || return undef;
1455
1456        # textual hashes are O.K.
1457        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1458                return $input;
1459        }
1460        # it must be correct pathname
1461        $input = validate_pathname($input)
1462                or return undef;
1463        # restrictions on ref name according to git-check-ref-format
1464        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1465                return undef;
1466        }
1467        return $input;
1468}
1469
1470# decode sequences of octets in utf8 into Perl's internal form,
1471# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1472# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1473sub to_utf8 {
1474        my $str = shift;
1475        return undef unless defined $str;
1476
1477        if (utf8::is_utf8($str) || utf8::decode($str)) {
1478                return $str;
1479        } else {
1480                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1481        }
1482}
1483
1484# quote unsafe chars, but keep the slash, even when it's not
1485# correct, but quoted slashes look too horrible in bookmarks
1486sub esc_param {
1487        my $str = shift;
1488        return undef unless defined $str;
1489        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1490        $str =~ s/ /\+/g;
1491        return $str;
1492}
1493
1494# the quoting rules for path_info fragment are slightly different
1495sub esc_path_info {
1496        my $str = shift;
1497        return undef unless defined $str;
1498
1499        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1500        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1501
1502        return $str;
1503}
1504
1505# quote unsafe chars in whole URL, so some characters cannot be quoted
1506sub esc_url {
1507        my $str = shift;
1508        return undef unless defined $str;
1509        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1510        $str =~ s/ /\+/g;
1511        return $str;
1512}
1513
1514# quote unsafe characters in HTML attributes
1515sub esc_attr {
1516
1517        # for XHTML conformance escaping '"' to '&quot;' is not enough
1518        return esc_html(@_);
1519}
1520
1521# replace invalid utf8 character with SUBSTITUTION sequence
1522sub esc_html {
1523        my $str = shift;
1524        my %opts = @_;
1525
1526        return undef unless defined $str;
1527
1528        $str = to_utf8($str);
1529        $str = $cgi->escapeHTML($str);
1530        if ($opts{'-nbsp'}) {
1531                $str =~ s/ /&nbsp;/g;
1532        }
1533        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1534        return $str;
1535}
1536
1537# quote control characters and escape filename to HTML
1538sub esc_path {
1539        my $str = shift;
1540        my %opts = @_;
1541
1542        return undef unless defined $str;
1543
1544        $str = to_utf8($str);
1545        $str = $cgi->escapeHTML($str);
1546        if ($opts{'-nbsp'}) {
1547                $str =~ s/ /&nbsp;/g;
1548        }
1549        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1550        return $str;
1551}
1552
1553# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1554sub sanitize {
1555        my $str = shift;
1556
1557        return undef unless defined $str;
1558
1559        $str = to_utf8($str);
1560        $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1561        return $str;
1562}
1563
1564# Make control characters "printable", using character escape codes (CEC)
1565sub quot_cec {
1566        my $cntrl = shift;
1567        my %opts = @_;
1568        my %es = ( # character escape codes, aka escape sequences
1569                "\t" => '\t',   # tab            (HT)
1570                "\n" => '\n',   # line feed      (LF)
1571                "\r" => '\r',   # carrige return (CR)
1572                "\f" => '\f',   # form feed      (FF)
1573                "\b" => '\b',   # backspace      (BS)
1574                "\a" => '\a',   # alarm (bell)   (BEL)
1575                "\e" => '\e',   # escape         (ESC)
1576                "\013" => '\v', # vertical tab   (VT)
1577                "\000" => '\0', # nul character  (NUL)
1578        );
1579        my $chr = ( (exists $es{$cntrl})
1580                    ? $es{$cntrl}
1581                    : sprintf('\%2x', ord($cntrl)) );
1582        if ($opts{-nohtml}) {
1583                return $chr;
1584        } else {
1585                return "<span class=\"cntrl\">$chr</span>";
1586        }
1587}
1588
1589# Alternatively use unicode control pictures codepoints,
1590# Unicode "printable representation" (PR)
1591sub quot_upr {
1592        my $cntrl = shift;
1593        my %opts = @_;
1594
1595        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1596        if ($opts{-nohtml}) {
1597                return $chr;
1598        } else {
1599                return "<span class=\"cntrl\">$chr</span>";
1600        }
1601}
1602
1603# git may return quoted and escaped filenames
1604sub unquote {
1605        my $str = shift;
1606
1607        sub unq {
1608                my $seq = shift;
1609                my %es = ( # character escape codes, aka escape sequences
1610                        't' => "\t",   # tab            (HT, TAB)
1611                        'n' => "\n",   # newline        (NL)
1612                        'r' => "\r",   # return         (CR)
1613                        'f' => "\f",   # form feed      (FF)
1614                        'b' => "\b",   # backspace      (BS)
1615                        'a' => "\a",   # alarm (bell)   (BEL)
1616                        'e' => "\e",   # escape         (ESC)
1617                        'v' => "\013", # vertical tab   (VT)
1618                );
1619
1620                if ($seq =~ m/^[0-7]{1,3}$/) {
1621                        # octal char sequence
1622                        return chr(oct($seq));
1623                } elsif (exists $es{$seq}) {
1624                        # C escape sequence, aka character escape code
1625                        return $es{$seq};
1626                }
1627                # quoted ordinary character
1628                return $seq;
1629        }
1630
1631        if ($str =~ m/^"(.*)"$/) {
1632                # needs unquoting
1633                $str = $1;
1634                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1635        }
1636        return $str;
1637}
1638
1639# escape tabs (convert tabs to spaces)
1640sub untabify {
1641        my $line = shift;
1642
1643        while ((my $pos = index($line, "\t")) != -1) {
1644                if (my $count = (8 - ($pos % 8))) {
1645                        my $spaces = ' ' x $count;
1646                        $line =~ s/\t/$spaces/;
1647                }
1648        }
1649
1650        return $line;
1651}
1652
1653sub project_in_list {
1654        my $project = shift;
1655        my @list = git_get_projects_list();
1656        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1657}
1658
1659## ----------------------------------------------------------------------
1660## HTML aware string manipulation
1661
1662# Try to chop given string on a word boundary between position
1663# $len and $len+$add_len. If there is no word boundary there,
1664# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1665# (marking chopped part) would be longer than given string.
1666sub chop_str {
1667        my $str = shift;
1668        my $len = shift;
1669        my $add_len = shift || 10;
1670        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1671
1672        # Make sure perl knows it is utf8 encoded so we don't
1673        # cut in the middle of a utf8 multibyte char.
1674        $str = to_utf8($str);
1675
1676        # allow only $len chars, but don't cut a word if it would fit in $add_len
1677        # if it doesn't fit, cut it if it's still longer than the dots we would add
1678        # remove chopped character entities entirely
1679
1680        # when chopping in the middle, distribute $len into left and right part
1681        # return early if chopping wouldn't make string shorter
1682        if ($where eq 'center') {
1683                return $str if ($len + 5 >= length($str)); # filler is length 5
1684                $len = int($len/2);
1685        } else {
1686                return $str if ($len + 4 >= length($str)); # filler is length 4
1687        }
1688
1689        # regexps: ending and beginning with word part up to $add_len
1690        my $endre = qr/.{$len}\w{0,$add_len}/;
1691        my $begre = qr/\w{0,$add_len}.{$len}/;
1692
1693        if ($where eq 'left') {
1694                $str =~ m/^(.*?)($begre)$/;
1695                my ($lead, $body) = ($1, $2);
1696                if (length($lead) > 4) {
1697                        $lead = " ...";
1698                }
1699                return "$lead$body";
1700
1701        } elsif ($where eq 'center') {
1702                $str =~ m/^($endre)(.*)$/;
1703                my ($left, $str)  = ($1, $2);
1704                $str =~ m/^(.*?)($begre)$/;
1705                my ($mid, $right) = ($1, $2);
1706                if (length($mid) > 5) {
1707                        $mid = " ... ";
1708                }
1709                return "$left$mid$right";
1710
1711        } else {
1712                $str =~ m/^($endre)(.*)$/;
1713                my $body = $1;
1714                my $tail = $2;
1715                if (length($tail) > 4) {
1716                        $tail = "... ";
1717                }
1718                return "$body$tail";
1719        }
1720}
1721
1722# takes the same arguments as chop_str, but also wraps a <span> around the
1723# result with a title attribute if it does get chopped. Additionally, the
1724# string is HTML-escaped.
1725sub chop_and_escape_str {
1726        my ($str) = @_;
1727
1728        my $chopped = chop_str(@_);
1729        $str = to_utf8($str);
1730        if ($chopped eq $str) {
1731                return esc_html($chopped);
1732        } else {
1733                $str =~ s/[[:cntrl:]]/?/g;
1734                return $cgi->span({-title=>$str}, esc_html($chopped));
1735        }
1736}
1737
1738# Highlight selected fragments of string, using given CSS class,
1739# and escape HTML.  It is assumed that fragments do not overlap.
1740# Regions are passed as list of pairs (array references).
1741#
1742# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1743# '<span class="mark">foo</span>bar'
1744sub esc_html_hl_regions {
1745        my ($str, $css_class, @sel) = @_;
1746        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1747        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1748        return esc_html($str, %opts) unless @sel;
1749
1750        my $out = '';
1751        my $pos = 0;
1752
1753        for my $s (@sel) {
1754                my ($begin, $end) = @$s;
1755
1756                # Don't create empty <span> elements.
1757                next if $end <= $begin;
1758
1759                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1760                                       %opts);
1761
1762                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1763                        if ($begin - $pos > 0);
1764                $out .= $cgi->span({-class => $css_class}, $escaped);
1765
1766                $pos = $end;
1767        }
1768        $out .= esc_html(substr($str, $pos), %opts)
1769                if ($pos < length($str));
1770
1771        return $out;
1772}
1773
1774# return positions of beginning and end of each match
1775sub matchpos_list {
1776        my ($str, $regexp) = @_;
1777        return unless (defined $str && defined $regexp);
1778
1779        my @matches;
1780        while ($str =~ /$regexp/g) {
1781                push @matches, [$-[0], $+[0]];
1782        }
1783        return @matches;
1784}
1785
1786# highlight match (if any), and escape HTML
1787sub esc_html_match_hl {
1788        my ($str, $regexp) = @_;
1789        return esc_html($str) unless defined $regexp;
1790
1791        my @matches = matchpos_list($str, $regexp);
1792        return esc_html($str) unless @matches;
1793
1794        return esc_html_hl_regions($str, 'match', @matches);
1795}
1796
1797
1798# highlight match (if any) of shortened string, and escape HTML
1799sub esc_html_match_hl_chopped {
1800        my ($str, $chopped, $regexp) = @_;
1801        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1802
1803        my @matches = matchpos_list($str, $regexp);
1804        return esc_html($chopped) unless @matches;
1805
1806        # filter matches so that we mark chopped string
1807        my $tail = "... "; # see chop_str
1808        unless ($chopped =~ s/\Q$tail\E$//) {
1809                $tail = '';
1810        }
1811        my $chop_len = length($chopped);
1812        my $tail_len = length($tail);
1813        my @filtered;
1814
1815        for my $m (@matches) {
1816                if ($m->[0] > $chop_len) {
1817                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1818                        last;
1819                } elsif ($m->[1] > $chop_len) {
1820                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1821                        last;
1822                }
1823                push @filtered, $m;
1824        }
1825
1826        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1827}
1828
1829## ----------------------------------------------------------------------
1830## functions returning short strings
1831
1832# CSS class for given age value (in seconds)
1833sub age_class {
1834        my $age = shift;
1835
1836        if (!defined $age) {
1837                return "noage";
1838        } elsif ($age < 60*60*2) {
1839                return "age0";
1840        } elsif ($age < 60*60*24*2) {
1841                return "age1";
1842        } else {
1843                return "age2";
1844        }
1845}
1846
1847# convert age in seconds to "nn units ago" string
1848sub age_string {
1849        my $age = shift;
1850        my $age_str;
1851
1852        if ($age > 60*60*24*365*2) {
1853                $age_str = (int $age/60/60/24/365);
1854                $age_str .= " years ago";
1855        } elsif ($age > 60*60*24*(365/12)*2) {
1856                $age_str = int $age/60/60/24/(365/12);
1857                $age_str .= " months ago";
1858        } elsif ($age > 60*60*24*7*2) {
1859                $age_str = int $age/60/60/24/7;
1860                $age_str .= " weeks ago";
1861        } elsif ($age > 60*60*24*2) {
1862                $age_str = int $age/60/60/24;
1863                $age_str .= " days ago";
1864        } elsif ($age > 60*60*2) {
1865                $age_str = int $age/60/60;
1866                $age_str .= " hours ago";
1867        } elsif ($age > 60*2) {
1868                $age_str = int $age/60;
1869                $age_str .= " min ago";
1870        } elsif ($age > 2) {
1871                $age_str = int $age;
1872                $age_str .= " sec ago";
1873        } else {
1874                $age_str .= " right now";
1875        }
1876        return $age_str;
1877}
1878
1879use constant {
1880        S_IFINVALID => 0030000,
1881        S_IFGITLINK => 0160000,
1882};
1883
1884# submodule/subproject, a commit object reference
1885sub S_ISGITLINK {
1886        my $mode = shift;
1887
1888        return (($mode & S_IFMT) == S_IFGITLINK)
1889}
1890
1891# convert file mode in octal to symbolic file mode string
1892sub mode_str {
1893        my $mode = oct shift;
1894
1895        if (S_ISGITLINK($mode)) {
1896                return 'm---------';
1897        } elsif (S_ISDIR($mode & S_IFMT)) {
1898                return 'drwxr-xr-x';
1899        } elsif (S_ISLNK($mode)) {
1900                return 'lrwxrwxrwx';
1901        } elsif (S_ISREG($mode)) {
1902                # git cares only about the executable bit
1903                if ($mode & S_IXUSR) {
1904                        return '-rwxr-xr-x';
1905                } else {
1906                        return '-rw-r--r--';
1907                };
1908        } else {
1909                return '----------';
1910        }
1911}
1912
1913# convert file mode in octal to file type string
1914sub file_type {
1915        my $mode = shift;
1916
1917        if ($mode !~ m/^[0-7]+$/) {
1918                return $mode;
1919        } else {
1920                $mode = oct $mode;
1921        }
1922
1923        if (S_ISGITLINK($mode)) {
1924                return "submodule";
1925        } elsif (S_ISDIR($mode & S_IFMT)) {
1926                return "directory";
1927        } elsif (S_ISLNK($mode)) {
1928                return "symlink";
1929        } elsif (S_ISREG($mode)) {
1930                return "file";
1931        } else {
1932                return "unknown";
1933        }
1934}
1935
1936# convert file mode in octal to file type description string
1937sub file_type_long {
1938        my $mode = shift;
1939
1940        if ($mode !~ m/^[0-7]+$/) {
1941                return $mode;
1942        } else {
1943                $mode = oct $mode;
1944        }
1945
1946        if (S_ISGITLINK($mode)) {
1947                return "submodule";
1948        } elsif (S_ISDIR($mode & S_IFMT)) {
1949                return "directory";
1950        } elsif (S_ISLNK($mode)) {
1951                return "symlink";
1952        } elsif (S_ISREG($mode)) {
1953                if ($mode & S_IXUSR) {
1954                        return "executable";
1955                } else {
1956                        return "file";
1957                };
1958        } else {
1959                return "unknown";
1960        }
1961}
1962
1963
1964## ----------------------------------------------------------------------
1965## functions returning short HTML fragments, or transforming HTML fragments
1966## which don't belong to other sections
1967
1968# format line of commit message.
1969sub format_log_line_html {
1970        my $line = shift;
1971
1972        $line = esc_html($line, -nbsp=>1);
1973        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1974                $cgi->a({-href => href(action=>"object", hash=>$1),
1975                                        -class => "text"}, $1);
1976        }eg;
1977
1978        return $line;
1979}
1980
1981# format marker of refs pointing to given object
1982
1983# the destination action is chosen based on object type and current context:
1984# - for annotated tags, we choose the tag view unless it's the current view
1985#   already, in which case we go to shortlog view
1986# - for other refs, we keep the current view if we're in history, shortlog or
1987#   log view, and select shortlog otherwise
1988sub format_ref_marker {
1989        my ($refs, $id) = @_;
1990        my $markers = '';
1991
1992        if (defined $refs->{$id}) {
1993                foreach my $ref (@{$refs->{$id}}) {
1994                        # this code exploits the fact that non-lightweight tags are the
1995                        # only indirect objects, and that they are the only objects for which
1996                        # we want to use tag instead of shortlog as action
1997                        my ($type, $name) = qw();
1998                        my $indirect = ($ref =~ s/\^\{\}$//);
1999                        # e.g. tags/v2.6.11 or heads/next
2000                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
2001                                $type = $1;
2002                                $name = $2;
2003                        } else {
2004                                $type = "ref";
2005                                $name = $ref;
2006                        }
2007
2008                        my $class = $type;
2009                        $class .= " indirect" if $indirect;
2010
2011                        my $dest_action = "shortlog";
2012
2013                        if ($indirect) {
2014                                $dest_action = "tag" unless $action eq "tag";
2015                        } elsif ($action =~ /^(history|(short)?log)$/) {
2016                                $dest_action = $action;
2017                        }
2018
2019                        my $dest = "";
2020                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2021                        $dest .= $ref;
2022
2023                        my $link = $cgi->a({
2024                                -href => href(
2025                                        action=>$dest_action,
2026                                        hash=>$dest
2027                                )}, $name);
2028
2029                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2030                                $link . "</span>";
2031                }
2032        }
2033
2034        if ($markers) {
2035                return ' <span class="refs">'. $markers . '</span>';
2036        } else {
2037                return "";
2038        }
2039}
2040
2041# format, perhaps shortened and with markers, title line
2042sub format_subject_html {
2043        my ($long, $short, $href, $extra) = @_;
2044        $extra = '' unless defined($extra);
2045
2046        if (length($short) < length($long)) {
2047                $long =~ s/[[:cntrl:]]/?/g;
2048                return $cgi->a({-href => $href, -class => "list subject",
2049                                -title => to_utf8($long)},
2050                       esc_html($short)) . $extra;
2051        } else {
2052                return $cgi->a({-href => $href, -class => "list subject"},
2053                       esc_html($long)) . $extra;
2054        }
2055}
2056
2057# Rather than recomputing the url for an email multiple times, we cache it
2058# after the first hit. This gives a visible benefit in views where the avatar
2059# for the same email is used repeatedly (e.g. shortlog).
2060# The cache is shared by all avatar engines (currently gravatar only), which
2061# are free to use it as preferred. Since only one avatar engine is used for any
2062# given page, there's no risk for cache conflicts.
2063our %avatar_cache = ();
2064
2065# Compute the picon url for a given email, by using the picon search service over at
2066# http://www.cs.indiana.edu/picons/search.html
2067sub picon_url {
2068        my $email = lc shift;
2069        if (!$avatar_cache{$email}) {
2070                my ($user, $domain) = split('@', $email);
2071                $avatar_cache{$email} =
2072                        "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2073                        "$domain/$user/" .
2074                        "users+domains+unknown/up/single";
2075        }
2076        return $avatar_cache{$email};
2077}
2078
2079# Compute the gravatar url for a given email, if it's not in the cache already.
2080# Gravatar stores only the part of the URL before the size, since that's the
2081# one computationally more expensive. This also allows reuse of the cache for
2082# different sizes (for this particular engine).
2083sub gravatar_url {
2084        my $email = lc shift;
2085        my $size = shift;
2086        $avatar_cache{$email} ||=
2087                "http://www.gravatar.com/avatar/" .
2088                        Digest::MD5::md5_hex($email) . "?s=";
2089        return $avatar_cache{$email} . $size;
2090}
2091
2092# Insert an avatar for the given $email at the given $size if the feature
2093# is enabled.
2094sub git_get_avatar {
2095        my ($email, %opts) = @_;
2096        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2097        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2098        $opts{-size} ||= 'default';
2099        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2100        my $url = "";
2101        if ($git_avatar eq 'gravatar') {
2102                $url = gravatar_url($email, $size);
2103        } elsif ($git_avatar eq 'picon') {
2104                $url = picon_url($email);
2105        }
2106        # Other providers can be added by extending the if chain, defining $url
2107        # as needed. If no variant puts something in $url, we assume avatars
2108        # are completely disabled/unavailable.
2109        if ($url) {
2110                return $pre_white .
2111                       "<img width=\"$size\" " .
2112                            "class=\"avatar\" " .
2113                            "src=\"".esc_url($url)."\" " .
2114                            "alt=\"\" " .
2115                       "/>" . $post_white;
2116        } else {
2117                return "";
2118        }
2119}
2120
2121sub format_search_author {
2122        my ($author, $searchtype, $displaytext) = @_;
2123        my $have_search = gitweb_check_feature('search');
2124
2125        if ($have_search) {
2126                my $performed = "";
2127                if ($searchtype eq 'author') {
2128                        $performed = "authored";
2129                } elsif ($searchtype eq 'committer') {
2130                        $performed = "committed";
2131                }
2132
2133                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2134                                searchtext=>$author,
2135                                searchtype=>$searchtype), class=>"list",
2136                                title=>"Search for commits $performed by $author"},
2137                                $displaytext);
2138
2139        } else {
2140                return $displaytext;
2141        }
2142}
2143
2144# format the author name of the given commit with the given tag
2145# the author name is chopped and escaped according to the other
2146# optional parameters (see chop_str).
2147sub format_author_html {
2148        my $tag = shift;
2149        my $co = shift;
2150        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2151        return "<$tag class=\"author\">" .
2152               format_search_author($co->{'author_name'}, "author",
2153                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2154                       $author) .
2155               "</$tag>";
2156}
2157
2158# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2159sub format_git_diff_header_line {
2160        my $line = shift;
2161        my $diffinfo = shift;
2162        my ($from, $to) = @_;
2163
2164        if ($diffinfo->{'nparents'}) {
2165                # combined diff
2166                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2167                if ($to->{'href'}) {
2168                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2169                                         esc_path($to->{'file'}));
2170                } else { # file was deleted (no href)
2171                        $line .= esc_path($to->{'file'});
2172                }
2173        } else {
2174                # "ordinary" diff
2175                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2176                if ($from->{'href'}) {
2177                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2178                                         'a/' . esc_path($from->{'file'}));
2179                } else { # file was added (no href)
2180                        $line .= 'a/' . esc_path($from->{'file'});
2181                }
2182                $line .= ' ';
2183                if ($to->{'href'}) {
2184                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2185                                         'b/' . esc_path($to->{'file'}));
2186                } else { # file was deleted
2187                        $line .= 'b/' . esc_path($to->{'file'});
2188                }
2189        }
2190
2191        return "<div class=\"diff header\">$line</div>\n";
2192}
2193
2194# format extended diff header line, before patch itself
2195sub format_extended_diff_header_line {
2196        my $line = shift;
2197        my $diffinfo = shift;
2198        my ($from, $to) = @_;
2199
2200        # match <path>
2201        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2202                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2203                                       esc_path($from->{'file'}));
2204        }
2205        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2206                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2207                                 esc_path($to->{'file'}));
2208        }
2209        # match single <mode>
2210        if ($line =~ m/\s(\d{6})$/) {
2211                $line .= '<span class="info"> (' .
2212                         file_type_long($1) .
2213                         ')</span>';
2214        }
2215        # match <hash>
2216        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2217                # can match only for combined diff
2218                $line = 'index ';
2219                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2220                        if ($from->{'href'}[$i]) {
2221                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2222                                                  -class=>"hash"},
2223                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2224                        } else {
2225                                $line .= '0' x 7;
2226                        }
2227                        # separator
2228                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2229                }
2230                $line .= '..';
2231                if ($to->{'href'}) {
2232                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2233                                         substr($diffinfo->{'to_id'},0,7));
2234                } else {
2235                        $line .= '0' x 7;
2236                }
2237
2238        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2239                # can match only for ordinary diff
2240                my ($from_link, $to_link);
2241                if ($from->{'href'}) {
2242                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2243                                             substr($diffinfo->{'from_id'},0,7));
2244                } else {
2245                        $from_link = '0' x 7;
2246                }
2247                if ($to->{'href'}) {
2248                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2249                                           substr($diffinfo->{'to_id'},0,7));
2250                } else {
2251                        $to_link = '0' x 7;
2252                }
2253                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2254                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2255        }
2256
2257        return $line . "<br/>\n";
2258}
2259
2260# format from-file/to-file diff header
2261sub format_diff_from_to_header {
2262        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2263        my $line;
2264        my $result = '';
2265
2266        $line = $from_line;
2267        #assert($line =~ m/^---/) if DEBUG;
2268        # no extra formatting for "^--- /dev/null"
2269        if (! $diffinfo->{'nparents'}) {
2270                # ordinary (single parent) diff
2271                if ($line =~ m!^--- "?a/!) {
2272                        if ($from->{'href'}) {
2273                                $line = '--- a/' .
2274                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2275                                                esc_path($from->{'file'}));
2276                        } else {
2277                                $line = '--- a/' .
2278                                        esc_path($from->{'file'});
2279                        }
2280                }
2281                $result .= qq!<div class="diff from_file">$line</div>\n!;
2282
2283        } else {
2284                # combined diff (merge commit)
2285                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2286                        if ($from->{'href'}[$i]) {
2287                                $line = '--- ' .
2288                                        $cgi->a({-href=>href(action=>"blobdiff",
2289                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2290                                                             hash_parent_base=>$parents[$i],
2291                                                             file_parent=>$from->{'file'}[$i],
2292                                                             hash=>$diffinfo->{'to_id'},
2293                                                             hash_base=>$hash,
2294                                                             file_name=>$to->{'file'}),
2295                                                 -class=>"path",
2296                                                 -title=>"diff" . ($i+1)},
2297                                                $i+1) .
2298                                        '/' .
2299                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2300                                                esc_path($from->{'file'}[$i]));
2301                        } else {
2302                                $line = '--- /dev/null';
2303                        }
2304                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2305                }
2306        }
2307
2308        $line = $to_line;
2309        #assert($line =~ m/^\+\+\+/) if DEBUG;
2310        # no extra formatting for "^+++ /dev/null"
2311        if ($line =~ m!^\+\+\+ "?b/!) {
2312                if ($to->{'href'}) {
2313                        $line = '+++ b/' .
2314                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2315                                        esc_path($to->{'file'}));
2316                } else {
2317                        $line = '+++ b/' .
2318                                esc_path($to->{'file'});
2319                }
2320        }
2321        $result .= qq!<div class="diff to_file">$line</div>\n!;
2322
2323        return $result;
2324}
2325
2326# create note for patch simplified by combined diff
2327sub format_diff_cc_simplified {
2328        my ($diffinfo, @parents) = @_;
2329        my $result = '';
2330
2331        $result .= "<div class=\"diff header\">" .
2332                   "diff --cc ";
2333        if (!is_deleted($diffinfo)) {
2334                $result .= $cgi->a({-href => href(action=>"blob",
2335                                                  hash_base=>$hash,
2336                                                  hash=>$diffinfo->{'to_id'},
2337                                                  file_name=>$diffinfo->{'to_file'}),
2338                                    -class => "path"},
2339                                   esc_path($diffinfo->{'to_file'}));
2340        } else {
2341                $result .= esc_path($diffinfo->{'to_file'});
2342        }
2343        $result .= "</div>\n" . # class="diff header"
2344                   "<div class=\"diff nodifferences\">" .
2345                   "Simple merge" .
2346                   "</div>\n"; # class="diff nodifferences"
2347
2348        return $result;
2349}
2350
2351sub diff_line_class {
2352        my ($line, $from, $to) = @_;
2353
2354        # ordinary diff
2355        my $num_sign = 1;
2356        # combined diff
2357        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2358                $num_sign = scalar @{$from->{'href'}};
2359        }
2360
2361        my @diff_line_classifier = (
2362                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2363                { regexp => qr/^\\/,               class => "incomplete"  },
2364                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2365                # classifier for context must come before classifier add/rem,
2366                # or we would have to use more complicated regexp, for example
2367                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2368                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2369                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2370        );
2371        for my $clsfy (@diff_line_classifier) {
2372                return $clsfy->{'class'}
2373                        if ($line =~ $clsfy->{'regexp'});
2374        }
2375
2376        # fallback
2377        return "";
2378}
2379
2380# assumes that $from and $to are defined and correctly filled,
2381# and that $line holds a line of chunk header for unified diff
2382sub format_unidiff_chunk_header {
2383        my ($line, $from, $to) = @_;
2384
2385        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2386                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2387
2388        $from_lines = 0 unless defined $from_lines;
2389        $to_lines   = 0 unless defined $to_lines;
2390
2391        if ($from->{'href'}) {
2392                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2393                                     -class=>"list"}, $from_text);
2394        }
2395        if ($to->{'href'}) {
2396                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2397                                     -class=>"list"}, $to_text);
2398        }
2399        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2400                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2401        return $line;
2402}
2403
2404# assumes that $from and $to are defined and correctly filled,
2405# and that $line holds a line of chunk header for combined diff
2406sub format_cc_diff_chunk_header {
2407        my ($line, $from, $to) = @_;
2408
2409        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2410        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2411
2412        @from_text = split(' ', $ranges);
2413        for (my $i = 0; $i < @from_text; ++$i) {
2414                ($from_start[$i], $from_nlines[$i]) =
2415                        (split(',', substr($from_text[$i], 1)), 0);
2416        }
2417
2418        $to_text   = pop @from_text;
2419        $to_start  = pop @from_start;
2420        $to_nlines = pop @from_nlines;
2421
2422        $line = "<span class=\"chunk_info\">$prefix ";
2423        for (my $i = 0; $i < @from_text; ++$i) {
2424                if ($from->{'href'}[$i]) {
2425                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2426                                          -class=>"list"}, $from_text[$i]);
2427                } else {
2428                        $line .= $from_text[$i];
2429                }
2430                $line .= " ";
2431        }
2432        if ($to->{'href'}) {
2433                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2434                                  -class=>"list"}, $to_text);
2435        } else {
2436                $line .= $to_text;
2437        }
2438        $line .= " $prefix</span>" .
2439                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2440        return $line;
2441}
2442
2443# process patch (diff) line (not to be used for diff headers),
2444# returning HTML-formatted (but not wrapped) line.
2445# If the line is passed as a reference, it is treated as HTML and not
2446# esc_html()'ed.
2447sub format_diff_line {
2448        my ($line, $diff_class, $from, $to) = @_;
2449
2450        if (ref($line)) {
2451                $line = $$line;
2452        } else {
2453                chomp $line;
2454                $line = untabify($line);
2455
2456                if ($from && $to && $line =~ m/^\@{2} /) {
2457                        $line = format_unidiff_chunk_header($line, $from, $to);
2458                } elsif ($from && $to && $line =~ m/^\@{3}/) {
2459                        $line = format_cc_diff_chunk_header($line, $from, $to);
2460                } else {
2461                        $line = esc_html($line, -nbsp=>1);
2462                }
2463        }
2464
2465        my $diff_classes = "diff";
2466        $diff_classes .= " $diff_class" if ($diff_class);
2467        $line = "<div class=\"$diff_classes\">$line</div>\n";
2468
2469        return $line;
2470}
2471
2472# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2473# linked.  Pass the hash of the tree/commit to snapshot.
2474sub format_snapshot_links {
2475        my ($hash) = @_;
2476        my $num_fmts = @snapshot_fmts;
2477        if ($num_fmts > 1) {
2478                # A parenthesized list of links bearing format names.
2479                # e.g. "snapshot (_tar.gz_ _zip_)"
2480                return "snapshot (" . join(' ', map
2481                        $cgi->a({
2482                                -href => href(
2483                                        action=>"snapshot",
2484                                        hash=>$hash,
2485                                        snapshot_format=>$_
2486                                )
2487                        }, $known_snapshot_formats{$_}{'display'})
2488                , @snapshot_fmts) . ")";
2489        } elsif ($num_fmts == 1) {
2490                # A single "snapshot" link whose tooltip bears the format name.
2491                # i.e. "_snapshot_"
2492                my ($fmt) = @snapshot_fmts;
2493                return
2494                        $cgi->a({
2495                                -href => href(
2496                                        action=>"snapshot",
2497                                        hash=>$hash,
2498                                        snapshot_format=>$fmt
2499                                ),
2500                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2501                        }, "snapshot");
2502        } else { # $num_fmts == 0
2503                return undef;
2504        }
2505}
2506
2507## ......................................................................
2508## functions returning values to be passed, perhaps after some
2509## transformation, to other functions; e.g. returning arguments to href()
2510
2511# returns hash to be passed to href to generate gitweb URL
2512# in -title key it returns description of link
2513sub get_feed_info {
2514        my $format = shift || 'Atom';
2515        my %res = (action => lc($format));
2516
2517        # feed links are possible only for project views
2518        return unless (defined $project);
2519        # some views should link to OPML, or to generic project feed,
2520        # or don't have specific feed yet (so they should use generic)
2521        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2522
2523        my $branch;
2524        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2525        # from tag links; this also makes possible to detect branch links
2526        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2527            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2528                $branch = $1;
2529        }
2530        # find log type for feed description (title)
2531        my $type = 'log';
2532        if (defined $file_name) {
2533                $type  = "history of $file_name";
2534                $type .= "/" if ($action eq 'tree');
2535                $type .= " on '$branch'" if (defined $branch);
2536        } else {
2537                $type = "log of $branch" if (defined $branch);
2538        }
2539
2540        $res{-title} = $type;
2541        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2542        $res{'file_name'} = $file_name;
2543
2544        return %res;
2545}
2546
2547## ----------------------------------------------------------------------
2548## git utility subroutines, invoking git commands
2549
2550# returns path to the core git executable and the --git-dir parameter as list
2551sub git_cmd {
2552        $number_of_git_cmds++;
2553        return $GIT, '--git-dir='.$git_dir;
2554}
2555
2556# quote the given arguments for passing them to the shell
2557# quote_command("command", "arg 1", "arg with ' and ! characters")
2558# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2559# Try to avoid using this function wherever possible.
2560sub quote_command {
2561        return join(' ',
2562                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2563}
2564
2565# get HEAD ref of given project as hash
2566sub git_get_head_hash {
2567        return git_get_full_hash(shift, 'HEAD');
2568}
2569
2570sub git_get_full_hash {
2571        return git_get_hash(@_);
2572}
2573
2574sub git_get_short_hash {
2575        return git_get_hash(@_, '--short=7');
2576}
2577
2578sub git_get_hash {
2579        my ($project, $hash, @options) = @_;
2580        my $o_git_dir = $git_dir;
2581        my $retval = undef;
2582        $git_dir = "$projectroot/$project";
2583        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2584            '--verify', '-q', @options, $hash) {
2585                $retval = <$fd>;
2586                chomp $retval if defined $retval;
2587                close $fd;
2588        }
2589        if (defined $o_git_dir) {
2590                $git_dir = $o_git_dir;
2591        }
2592        return $retval;
2593}
2594
2595# get type of given object
2596sub git_get_type {
2597        my $hash = shift;
2598
2599        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2600        my $type = <$fd>;
2601        close $fd or return;
2602        chomp $type;
2603        return $type;
2604}
2605
2606# repository configuration
2607our $config_file = '';
2608our %config;
2609
2610# store multiple values for single key as anonymous array reference
2611# single values stored directly in the hash, not as [ <value> ]
2612sub hash_set_multi {
2613        my ($hash, $key, $value) = @_;
2614
2615        if (!exists $hash->{$key}) {
2616                $hash->{$key} = $value;
2617        } elsif (!ref $hash->{$key}) {
2618                $hash->{$key} = [ $hash->{$key}, $value ];
2619        } else {
2620                push @{$hash->{$key}}, $value;
2621        }
2622}
2623
2624# return hash of git project configuration
2625# optionally limited to some section, e.g. 'gitweb'
2626sub git_parse_project_config {
2627        my $section_regexp = shift;
2628        my %config;
2629
2630        local $/ = "\0";
2631
2632        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2633                or return;
2634
2635        while (my $keyval = <$fh>) {
2636                chomp $keyval;
2637                my ($key, $value) = split(/\n/, $keyval, 2);
2638
2639                hash_set_multi(\%config, $key, $value)
2640                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2641        }
2642        close $fh;
2643
2644        return %config;
2645}
2646
2647# convert config value to boolean: 'true' or 'false'
2648# no value, number > 0, 'true' and 'yes' values are true
2649# rest of values are treated as false (never as error)
2650sub config_to_bool {
2651        my $val = shift;
2652
2653        return 1 if !defined $val;             # section.key
2654
2655        # strip leading and trailing whitespace
2656        $val =~ s/^\s+//;
2657        $val =~ s/\s+$//;
2658
2659        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2660                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2661}
2662
2663# convert config value to simple decimal number
2664# an optional value suffix of 'k', 'm', or 'g' will cause the value
2665# to be multiplied by 1024, 1048576, or 1073741824
2666sub config_to_int {
2667        my $val = shift;
2668
2669        # strip leading and trailing whitespace
2670        $val =~ s/^\s+//;
2671        $val =~ s/\s+$//;
2672
2673        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2674                $unit = lc($unit);
2675                # unknown unit is treated as 1
2676                return $num * ($unit eq 'g' ? 1073741824 :
2677                               $unit eq 'm' ?    1048576 :
2678                               $unit eq 'k' ?       1024 : 1);
2679        }
2680        return $val;
2681}
2682
2683# convert config value to array reference, if needed
2684sub config_to_multi {
2685        my $val = shift;
2686
2687        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2688}
2689
2690sub git_get_project_config {
2691        my ($key, $type) = @_;
2692
2693        return unless defined $git_dir;
2694
2695        # key sanity check
2696        return unless ($key);
2697        # only subsection, if exists, is case sensitive,
2698        # and not lowercased by 'git config -z -l'
2699        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2700                $key = join(".", lc($hi), $mi, lc($lo));
2701        } else {
2702                $key = lc($key);
2703        }
2704        $key =~ s/^gitweb\.//;
2705        return if ($key =~ m/\W/);
2706
2707        # type sanity check
2708        if (defined $type) {
2709                $type =~ s/^--//;
2710                $type = undef
2711                        unless ($type eq 'bool' || $type eq 'int');
2712        }
2713
2714        # get config
2715        if (!defined $config_file ||
2716            $config_file ne "$git_dir/config") {
2717                %config = git_parse_project_config('gitweb');
2718                $config_file = "$git_dir/config";
2719        }
2720
2721        # check if config variable (key) exists
2722        return unless exists $config{"gitweb.$key"};
2723
2724        # ensure given type
2725        if (!defined $type) {
2726                return $config{"gitweb.$key"};
2727        } elsif ($type eq 'bool') {
2728                # backward compatibility: 'git config --bool' returns true/false
2729                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2730        } elsif ($type eq 'int') {
2731                return config_to_int($config{"gitweb.$key"});
2732        }
2733        return $config{"gitweb.$key"};
2734}
2735
2736# get hash of given path at given ref
2737sub git_get_hash_by_path {
2738        my $base = shift;
2739        my $path = shift || return undef;
2740        my $type = shift;
2741
2742        $path =~ s,/+$,,;
2743
2744        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2745                or die_error(500, "Open git-ls-tree failed");
2746        my $line = <$fd>;
2747        close $fd or return undef;
2748
2749        if (!defined $line) {
2750                # there is no tree or hash given by $path at $base
2751                return undef;
2752        }
2753
2754        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2755        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2756        if (defined $type && $type ne $2) {
2757                # type doesn't match
2758                return undef;
2759        }
2760        return $3;
2761}
2762
2763# get path of entry with given hash at given tree-ish (ref)
2764# used to get 'from' filename for combined diff (merge commit) for renames
2765sub git_get_path_by_hash {
2766        my $base = shift || return;
2767        my $hash = shift || return;
2768
2769        local $/ = "\0";
2770
2771        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2772                or return undef;
2773        while (my $line = <$fd>) {
2774                chomp $line;
2775
2776                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2777                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2778                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2779                        close $fd;
2780                        return $1;
2781                }
2782        }
2783        close $fd;
2784        return undef;
2785}
2786
2787## ......................................................................
2788## git utility functions, directly accessing git repository
2789
2790# get the value of config variable either from file named as the variable
2791# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2792# configuration variable in the repository config file.
2793sub git_get_file_or_project_config {
2794        my ($path, $name) = @_;
2795
2796        $git_dir = "$projectroot/$path";
2797        open my $fd, '<', "$git_dir/$name"
2798                or return git_get_project_config($name);
2799        my $conf = <$fd>;
2800        close $fd;
2801        if (defined $conf) {
2802                chomp $conf;
2803        }
2804        return $conf;
2805}
2806
2807sub git_get_project_description {
2808        my $path = shift;
2809        return git_get_file_or_project_config($path, 'description');
2810}
2811
2812sub git_get_project_category {
2813        my $path = shift;
2814        return git_get_file_or_project_config($path, 'category');
2815}
2816
2817
2818# supported formats:
2819# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2820#   - if its contents is a number, use it as tag weight,
2821#   - otherwise add a tag with weight 1
2822# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2823#   the same value multiple times increases tag weight
2824# * `gitweb.ctag' multi-valued repo config variable
2825sub git_get_project_ctags {
2826        my $project = shift;
2827        my $ctags = {};
2828
2829        $git_dir = "$projectroot/$project";
2830        if (opendir my $dh, "$git_dir/ctags") {
2831                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2832                foreach my $tagfile (@files) {
2833                        open my $ct, '<', $tagfile
2834                                or next;
2835                        my $val = <$ct>;
2836                        chomp $val if $val;
2837                        close $ct;
2838
2839                        (my $ctag = $tagfile) =~ s#.*/##;
2840                        if ($val =~ /^\d+$/) {
2841                                $ctags->{$ctag} = $val;
2842                        } else {
2843                                $ctags->{$ctag} = 1;
2844                        }
2845                }
2846                closedir $dh;
2847
2848        } elsif (open my $fh, '<', "$git_dir/ctags") {
2849                while (my $line = <$fh>) {
2850                        chomp $line;
2851                        $ctags->{$line}++ if $line;
2852                }
2853                close $fh;
2854
2855        } else {
2856                my $taglist = config_to_multi(git_get_project_config('ctag'));
2857                foreach my $tag (@$taglist) {
2858                        $ctags->{$tag}++;
2859                }
2860        }
2861
2862        return $ctags;
2863}
2864
2865# return hash, where keys are content tags ('ctags'),
2866# and values are sum of weights of given tag in every project
2867sub git_gather_all_ctags {
2868        my $projects = shift;
2869        my $ctags = {};
2870
2871        foreach my $p (@$projects) {
2872                foreach my $ct (keys %{$p->{'ctags'}}) {
2873                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2874                }
2875        }
2876
2877        return $ctags;
2878}
2879
2880sub git_populate_project_tagcloud {
2881        my $ctags = shift;
2882
2883        # First, merge different-cased tags; tags vote on casing
2884        my %ctags_lc;
2885        foreach (keys %$ctags) {
2886                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2887                if (not $ctags_lc{lc $_}->{topcount}
2888                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2889                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2890                        $ctags_lc{lc $_}->{topname} = $_;
2891                }
2892        }
2893
2894        my $cloud;
2895        my $matched = $input_params{'ctag'};
2896        if (eval { require HTML::TagCloud; 1; }) {
2897                $cloud = HTML::TagCloud->new;
2898                foreach my $ctag (sort keys %ctags_lc) {
2899                        # Pad the title with spaces so that the cloud looks
2900                        # less crammed.
2901                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2902                        $title =~ s/ /&nbsp;/g;
2903                        $title =~ s/^/&nbsp;/g;
2904                        $title =~ s/$/&nbsp;/g;
2905                        if (defined $matched && $matched eq $ctag) {
2906                                $title = qq(<span class="match">$title</span>);
2907                        }
2908                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2909                                    $ctags_lc{$ctag}->{count});
2910                }
2911        } else {
2912                $cloud = {};
2913                foreach my $ctag (keys %ctags_lc) {
2914                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2915                        if (defined $matched && $matched eq $ctag) {
2916                                $title = qq(<span class="match">$title</span>);
2917                        }
2918                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2919                        $cloud->{$ctag}{ctag} =
2920                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2921                }
2922        }
2923        return $cloud;
2924}
2925
2926sub git_show_project_tagcloud {
2927        my ($cloud, $count) = @_;
2928        if (ref $cloud eq 'HTML::TagCloud') {
2929                return $cloud->html_and_css($count);
2930        } else {
2931                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2932                return
2933                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2934                        join (', ', map {
2935                                $cloud->{$_}->{'ctag'}
2936                        } splice(@tags, 0, $count)) .
2937                        '</div>';
2938        }
2939}
2940
2941sub git_get_project_url_list {
2942        my $path = shift;
2943
2944        $git_dir = "$projectroot/$path";
2945        open my $fd, '<', "$git_dir/cloneurl"
2946                or return wantarray ?
2947                @{ config_to_multi(git_get_project_config('url')) } :
2948                   config_to_multi(git_get_project_config('url'));
2949        my @git_project_url_list = map { chomp; $_ } <$fd>;
2950        close $fd;
2951
2952        return wantarray ? @git_project_url_list : \@git_project_url_list;
2953}
2954
2955sub git_get_projects_list {
2956        my $filter = shift || '';
2957        my $paranoid = shift;
2958        my @list;
2959
2960        if (-d $projects_list) {
2961                # search in directory
2962                my $dir = $projects_list;
2963                # remove the trailing "/"
2964                $dir =~ s!/+$!!;
2965                my $pfxlen = length("$dir");
2966                my $pfxdepth = ($dir =~ tr!/!!);
2967                # when filtering, search only given subdirectory
2968                if ($filter && !$paranoid) {
2969                        $dir .= "/$filter";
2970                        $dir =~ s!/+$!!;
2971                }
2972
2973                File::Find::find({
2974                        follow_fast => 1, # follow symbolic links
2975                        follow_skip => 2, # ignore duplicates
2976                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2977                        wanted => sub {
2978                                # global variables
2979                                our $project_maxdepth;
2980                                our $projectroot;
2981                                # skip project-list toplevel, if we get it.
2982                                return if (m!^[/.]$!);
2983                                # only directories can be git repositories
2984                                return unless (-d $_);
2985                                # don't traverse too deep (Find is super slow on os x)
2986                                # $project_maxdepth excludes depth of $projectroot
2987                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2988                                        $File::Find::prune = 1;
2989                                        return;
2990                                }
2991
2992                                my $path = substr($File::Find::name, $pfxlen + 1);
2993                                # paranoidly only filter here
2994                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2995                                        next;
2996                                }
2997                                # we check related file in $projectroot
2998                                if (check_export_ok("$projectroot/$path")) {
2999                                        push @list, { path => $path };
3000                                        $File::Find::prune = 1;
3001                                }
3002                        },
3003                }, "$dir");
3004
3005        } elsif (-f $projects_list) {
3006                # read from file(url-encoded):
3007                # 'git%2Fgit.git Linus+Torvalds'
3008                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3009                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3010                open my $fd, '<', $projects_list or return;
3011        PROJECT:
3012                while (my $line = <$fd>) {
3013                        chomp $line;
3014                        my ($path, $owner) = split ' ', $line;
3015                        $path = unescape($path);
3016                        $owner = unescape($owner);
3017                        if (!defined $path) {
3018                                next;
3019                        }
3020                        # if $filter is rpovided, check if $path begins with $filter
3021                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3022                                next;
3023                        }
3024                        if (check_export_ok("$projectroot/$path")) {
3025                                my $pr = {
3026                                        path => $path
3027                                };
3028                                if ($owner) {
3029                                        $pr->{'owner'} = to_utf8($owner);
3030                                }
3031                                push @list, $pr;
3032                        }
3033                }
3034                close $fd;
3035        }
3036        return @list;
3037}
3038
3039# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3040# as side effects it sets 'forks' field to list of forks for forked projects
3041sub filter_forks_from_projects_list {
3042        my $projects = shift;
3043
3044        my %trie; # prefix tree of directories (path components)
3045        # generate trie out of those directories that might contain forks
3046        foreach my $pr (@$projects) {
3047                my $path = $pr->{'path'};
3048                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3049                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3050                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3051                next unless (-d "$projectroot/$path"); # containing directory exists
3052                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3053
3054                # add to trie
3055                my @dirs = split('/', $path);
3056                # walk the trie, until either runs out of components or out of trie
3057                my $ref = \%trie;
3058                while (scalar @dirs &&
3059                       exists($ref->{$dirs[0]})) {
3060                        $ref = $ref->{shift @dirs};
3061                }
3062                # create rest of trie structure from rest of components
3063                foreach my $dir (@dirs) {
3064                        $ref = $ref->{$dir} = {};
3065                }
3066                # create end marker, store $pr as a data
3067                $ref->{''} = $pr if (!exists $ref->{''});
3068        }
3069
3070        # filter out forks, by finding shortest prefix match for paths
3071        my @filtered;
3072 PROJECT:
3073        foreach my $pr (@$projects) {
3074                # trie lookup
3075                my $ref = \%trie;
3076        DIR:
3077                foreach my $dir (split('/', $pr->{'path'})) {
3078                        if (exists $ref->{''}) {
3079                                # found [shortest] prefix, is a fork - skip it
3080                                push @{$ref->{''}{'forks'}}, $pr;
3081                                next PROJECT;
3082                        }
3083                        if (!exists $ref->{$dir}) {
3084                                # not in trie, cannot have prefix, not a fork
3085                                push @filtered, $pr;
3086                                next PROJECT;
3087                        }
3088                        # If the dir is there, we just walk one step down the trie.
3089                        $ref = $ref->{$dir};
3090                }
3091                # we ran out of trie
3092                # (shouldn't happen: it's either no match, or end marker)
3093                push @filtered, $pr;
3094        }
3095
3096        return @filtered;
3097}
3098
3099# note: fill_project_list_info must be run first,
3100# for 'descr_long' and 'ctags' to be filled
3101sub search_projects_list {
3102        my ($projlist, %opts) = @_;
3103        my $tagfilter  = $opts{'tagfilter'};
3104        my $search_re = $opts{'search_regexp'};
3105
3106        return @$projlist
3107                unless ($tagfilter || $search_re);
3108
3109        # searching projects require filling to be run before it;
3110        fill_project_list_info($projlist,
3111                               $tagfilter  ? 'ctags' : (),
3112                               $search_re ? ('path', 'descr') : ());
3113        my @projects;
3114 PROJECT:
3115        foreach my $pr (@$projlist) {
3116
3117                if ($tagfilter) {
3118                        next unless ref($pr->{'ctags'}) eq 'HASH';
3119                        next unless
3120                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3121                }
3122
3123                if ($search_re) {
3124                        next unless
3125                                $pr->{'path'} =~ /$search_re/ ||
3126                                $pr->{'descr_long'} =~ /$search_re/;
3127                }
3128
3129                push @projects, $pr;
3130        }
3131
3132        return @projects;
3133}
3134
3135our $gitweb_project_owner = undef;
3136sub git_get_project_list_from_file {
3137
3138        return if (defined $gitweb_project_owner);
3139
3140        $gitweb_project_owner = {};
3141        # read from file (url-encoded):
3142        # 'git%2Fgit.git Linus+Torvalds'
3143        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3144        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3145        if (-f $projects_list) {
3146                open(my $fd, '<', $projects_list);
3147                while (my $line = <$fd>) {
3148                        chomp $line;
3149                        my ($pr, $ow) = split ' ', $line;
3150                        $pr = unescape($pr);
3151                        $ow = unescape($ow);
3152                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3153                }
3154                close $fd;
3155        }
3156}
3157
3158sub git_get_project_owner {
3159        my $project = shift;
3160        my $owner;
3161
3162        return undef unless $project;
3163        $git_dir = "$projectroot/$project";
3164
3165        if (!defined $gitweb_project_owner) {
3166                git_get_project_list_from_file();
3167        }
3168
3169        if (exists $gitweb_project_owner->{$project}) {
3170                $owner = $gitweb_project_owner->{$project};
3171        }
3172        if (!defined $owner){
3173                $owner = git_get_project_config('owner');
3174        }
3175        if (!defined $owner) {
3176                $owner = get_file_owner("$git_dir");
3177        }
3178
3179        return $owner;
3180}
3181
3182sub git_get_last_activity {
3183        my ($path) = @_;
3184        my $fd;
3185
3186        $git_dir = "$projectroot/$path";
3187        open($fd, "-|", git_cmd(), 'for-each-ref',
3188             '--format=%(committer)',
3189             '--sort=-committerdate',
3190             '--count=1',
3191             'refs/heads') or return;
3192        my $most_recent = <$fd>;
3193        close $fd or return;
3194        if (defined $most_recent &&
3195            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3196                my $timestamp = $1;
3197                my $age = time - $timestamp;
3198                return ($age, age_string($age));
3199        }
3200        return (undef, undef);
3201}
3202
3203# Implementation note: when a single remote is wanted, we cannot use 'git
3204# remote show -n' because that command always work (assuming it's a remote URL
3205# if it's not defined), and we cannot use 'git remote show' because that would
3206# try to make a network roundtrip. So the only way to find if that particular
3207# remote is defined is to walk the list provided by 'git remote -v' and stop if
3208# and when we find what we want.
3209sub git_get_remotes_list {
3210        my $wanted = shift;
3211        my %remotes = ();
3212
3213        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3214        return unless $fd;
3215        while (my $remote = <$fd>) {
3216                chomp $remote;
3217                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3218                next if $wanted and not $remote eq $wanted;
3219                my ($url, $key) = ($1, $2);
3220
3221                $remotes{$remote} ||= { 'heads' => () };
3222                $remotes{$remote}{$key} = $url;
3223        }
3224        close $fd or return;
3225        return wantarray ? %remotes : \%remotes;
3226}
3227
3228# Takes a hash of remotes as first parameter and fills it by adding the
3229# available remote heads for each of the indicated remotes.
3230sub fill_remote_heads {
3231        my $remotes = shift;
3232        my @heads = map { "remotes/$_" } keys %$remotes;
3233        my @remoteheads = git_get_heads_list(undef, @heads);
3234        foreach my $remote (keys %$remotes) {
3235                $remotes->{$remote}{'heads'} = [ grep {
3236                        $_->{'name'} =~ s!^$remote/!!
3237                        } @remoteheads ];
3238        }
3239}
3240
3241sub git_get_references {
3242        my $type = shift || "";
3243        my %refs;
3244        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3245        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3246        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3247                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3248                or return;
3249
3250        while (my $line = <$fd>) {
3251                chomp $line;
3252                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3253                        if (defined $refs{$1}) {
3254                                push @{$refs{$1}}, $2;
3255                        } else {
3256                                $refs{$1} = [ $2 ];
3257                        }
3258                }
3259        }
3260        close $fd or return;
3261        return \%refs;
3262}
3263
3264sub git_get_rev_name_tags {
3265        my $hash = shift || return undef;
3266
3267        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3268                or return;
3269        my $name_rev = <$fd>;
3270        close $fd;
3271
3272        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3273                return $1;
3274        } else {
3275                # catches also '$hash undefined' output
3276                return undef;
3277        }
3278}
3279
3280## ----------------------------------------------------------------------
3281## parse to hash functions
3282
3283sub parse_date {
3284        my $epoch = shift;
3285        my $tz = shift || "-0000";
3286
3287        my %date;
3288        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3289        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3290        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3291        $date{'hour'} = $hour;
3292        $date{'minute'} = $min;
3293        $date{'mday'} = $mday;
3294        $date{'day'} = $days[$wday];
3295        $date{'month'} = $months[$mon];
3296        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3297                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3298        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3299                             $mday, $months[$mon], $hour ,$min;
3300        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3301                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3302
3303        my ($tz_sign, $tz_hour, $tz_min) =
3304                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3305        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3306        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3307        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3308        $date{'hour_local'} = $hour;
3309        $date{'minute_local'} = $min;
3310        $date{'tz_local'} = $tz;
3311        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3312                                  1900+$year, $mon+1, $mday,
3313                                  $hour, $min, $sec, $tz);
3314        return %date;
3315}
3316
3317sub parse_tag {
3318        my $tag_id = shift;
3319        my %tag;
3320        my @comment;
3321
3322        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3323        $tag{'id'} = $tag_id;
3324        while (my $line = <$fd>) {
3325                chomp $line;
3326                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3327                        $tag{'object'} = $1;
3328                } elsif ($line =~ m/^type (.+)$/) {
3329                        $tag{'type'} = $1;
3330                } elsif ($line =~ m/^tag (.+)$/) {
3331                        $tag{'name'} = $1;
3332                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3333                        $tag{'author'} = $1;
3334                        $tag{'author_epoch'} = $2;
3335                        $tag{'author_tz'} = $3;
3336                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3337                                $tag{'author_name'}  = $1;
3338                                $tag{'author_email'} = $2;
3339                        } else {
3340                                $tag{'author_name'} = $tag{'author'};
3341                        }
3342                } elsif ($line =~ m/--BEGIN/) {
3343                        push @comment, $line;
3344                        last;
3345                } elsif ($line eq "") {
3346                        last;
3347                }
3348        }
3349        push @comment, <$fd>;
3350        $tag{'comment'} = \@comment;
3351        close $fd or return;
3352        if (!defined $tag{'name'}) {
3353                return
3354        };
3355        return %tag
3356}
3357
3358sub parse_commit_text {
3359        my ($commit_text, $withparents) = @_;
3360        my @commit_lines = split '\n', $commit_text;
3361        my %co;
3362
3363        pop @commit_lines; # Remove '\0'
3364
3365        if (! @commit_lines) {
3366                return;
3367        }
3368
3369        my $header = shift @commit_lines;
3370        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3371                return;
3372        }
3373        ($co{'id'}, my @parents) = split ' ', $header;
3374        while (my $line = shift @commit_lines) {
3375                last if $line eq "\n";
3376                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3377                        $co{'tree'} = $1;
3378                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3379                        push @parents, $1;
3380                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3381                        $co{'author'} = to_utf8($1);
3382                        $co{'author_epoch'} = $2;
3383                        $co{'author_tz'} = $3;
3384                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3385                                $co{'author_name'}  = $1;
3386                                $co{'author_email'} = $2;
3387                        } else {
3388                                $co{'author_name'} = $co{'author'};
3389                        }
3390                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3391                        $co{'committer'} = to_utf8($1);
3392                        $co{'committer_epoch'} = $2;
3393                        $co{'committer_tz'} = $3;
3394                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3395                                $co{'committer_name'}  = $1;
3396                                $co{'committer_email'} = $2;
3397                        } else {
3398                                $co{'committer_name'} = $co{'committer'};
3399                        }
3400                }
3401        }
3402        if (!defined $co{'tree'}) {
3403                return;
3404        };
3405        $co{'parents'} = \@parents;
3406        $co{'parent'} = $parents[0];
3407
3408        foreach my $title (@commit_lines) {
3409                $title =~ s/^    //;
3410                if ($title ne "") {
3411                        $co{'title'} = chop_str($title, 80, 5);
3412                        # remove leading stuff of merges to make the interesting part visible
3413                        if (length($title) > 50) {
3414                                $title =~ s/^Automatic //;
3415                                $title =~ s/^merge (of|with) /Merge ... /i;
3416                                if (length($title) > 50) {
3417                                        $title =~ s/(http|rsync):\/\///;
3418                                }
3419                                if (length($title) > 50) {
3420                                        $title =~ s/(master|www|rsync)\.//;
3421                                }
3422                                if (length($title) > 50) {
3423                                        $title =~ s/kernel.org:?//;
3424                                }
3425                                if (length($title) > 50) {
3426                                        $title =~ s/\/pub\/scm//;
3427                                }
3428                        }
3429                        $co{'title_short'} = chop_str($title, 50, 5);
3430                        last;
3431                }
3432        }
3433        if (! defined $co{'title'} || $co{'title'} eq "") {
3434                $co{'title'} = $co{'title_short'} = '(no commit message)';
3435        }
3436        # remove added spaces
3437        foreach my $line (@commit_lines) {
3438                $line =~ s/^    //;
3439        }
3440        $co{'comment'} = \@commit_lines;
3441
3442        my $age = time - $co{'committer_epoch'};
3443        $co{'age'} = $age;
3444        $co{'age_string'} = age_string($age);
3445        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3446        if ($age > 60*60*24*7*2) {
3447                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3448                $co{'age_string_age'} = $co{'age_string'};
3449        } else {
3450                $co{'age_string_date'} = $co{'age_string'};
3451                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3452        }
3453        return %co;
3454}
3455
3456sub parse_commit {
3457        my ($commit_id) = @_;
3458        my %co;
3459
3460        local $/ = "\0";
3461
3462        open my $fd, "-|", git_cmd(), "rev-list",
3463                "--parents",
3464                "--header",
3465                "--max-count=1",
3466                $commit_id,
3467                "--",
3468                or die_error(500, "Open git-rev-list failed");
3469        %co = parse_commit_text(<$fd>, 1);
3470        close $fd;
3471
3472        return %co;
3473}
3474
3475sub parse_commits {
3476        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3477        my @cos;
3478
3479        $maxcount ||= 1;
3480        $skip ||= 0;
3481
3482        local $/ = "\0";
3483
3484        open my $fd, "-|", git_cmd(), "rev-list",
3485                "--header",
3486                @args,
3487                ("--max-count=" . $maxcount),
3488                ("--skip=" . $skip),
3489                @extra_options,
3490                $commit_id,
3491                "--",
3492                ($filename ? ($filename) : ())
3493                or die_error(500, "Open git-rev-list failed");
3494        while (my $line = <$fd>) {
3495                my %co = parse_commit_text($line);
3496                push @cos, \%co;
3497        }
3498        close $fd;
3499
3500        return wantarray ? @cos : \@cos;
3501}
3502
3503# parse line of git-diff-tree "raw" output
3504sub parse_difftree_raw_line {
3505        my $line = shift;
3506        my %res;
3507
3508        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3509        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3510        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3511                $res{'from_mode'} = $1;
3512                $res{'to_mode'} = $2;
3513                $res{'from_id'} = $3;
3514                $res{'to_id'} = $4;
3515                $res{'status'} = $5;
3516                $res{'similarity'} = $6;
3517                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3518                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3519                } else {
3520                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3521                }
3522        }
3523        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3524        # combined diff (for merge commit)
3525        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3526                $res{'nparents'}  = length($1);
3527                $res{'from_mode'} = [ split(' ', $2) ];
3528                $res{'to_mode'} = pop @{$res{'from_mode'}};
3529                $res{'from_id'} = [ split(' ', $3) ];
3530                $res{'to_id'} = pop @{$res{'from_id'}};
3531                $res{'status'} = [ split('', $4) ];
3532                $res{'to_file'} = unquote($5);
3533        }
3534        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3535        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3536                $res{'commit'} = $1;
3537        }
3538
3539        return wantarray ? %res : \%res;
3540}
3541
3542# wrapper: return parsed line of git-diff-tree "raw" output
3543# (the argument might be raw line, or parsed info)
3544sub parsed_difftree_line {
3545        my $line_or_ref = shift;
3546
3547        if (ref($line_or_ref) eq "HASH") {
3548                # pre-parsed (or generated by hand)
3549                return $line_or_ref;
3550        } else {
3551                return parse_difftree_raw_line($line_or_ref);
3552        }
3553}
3554
3555# parse line of git-ls-tree output
3556sub parse_ls_tree_line {
3557        my $line = shift;
3558        my %opts = @_;
3559        my %res;
3560
3561        if ($opts{'-l'}) {
3562                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3563                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3564
3565                $res{'mode'} = $1;
3566                $res{'type'} = $2;
3567                $res{'hash'} = $3;
3568                $res{'size'} = $4;
3569                if ($opts{'-z'}) {
3570                        $res{'name'} = $5;
3571                } else {
3572                        $res{'name'} = unquote($5);
3573                }
3574        } else {
3575                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3576                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3577
3578                $res{'mode'} = $1;
3579                $res{'type'} = $2;
3580                $res{'hash'} = $3;
3581                if ($opts{'-z'}) {
3582                        $res{'name'} = $4;
3583                } else {
3584                        $res{'name'} = unquote($4);
3585                }
3586        }
3587
3588        return wantarray ? %res : \%res;
3589}
3590
3591# generates _two_ hashes, references to which are passed as 2 and 3 argument
3592sub parse_from_to_diffinfo {
3593        my ($diffinfo, $from, $to, @parents) = @_;
3594
3595        if ($diffinfo->{'nparents'}) {
3596                # combined diff
3597                $from->{'file'} = [];
3598                $from->{'href'} = [];
3599                fill_from_file_info($diffinfo, @parents)
3600                        unless exists $diffinfo->{'from_file'};
3601                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3602                        $from->{'file'}[$i] =
3603                                defined $diffinfo->{'from_file'}[$i] ?
3604                                        $diffinfo->{'from_file'}[$i] :
3605                                        $diffinfo->{'to_file'};
3606                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3607                                $from->{'href'}[$i] = href(action=>"blob",
3608                                                           hash_base=>$parents[$i],
3609                                                           hash=>$diffinfo->{'from_id'}[$i],
3610                                                           file_name=>$from->{'file'}[$i]);
3611                        } else {
3612                                $from->{'href'}[$i] = undef;
3613                        }
3614                }
3615        } else {
3616                # ordinary (not combined) diff
3617                $from->{'file'} = $diffinfo->{'from_file'};
3618                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3619                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3620                                               hash=>$diffinfo->{'from_id'},
3621                                               file_name=>$from->{'file'});
3622                } else {
3623                        delete $from->{'href'};
3624                }
3625        }
3626
3627        $to->{'file'} = $diffinfo->{'to_file'};
3628        if (!is_deleted($diffinfo)) { # file exists in result
3629                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3630                                     hash=>$diffinfo->{'to_id'},
3631                                     file_name=>$to->{'file'});
3632        } else {
3633                delete $to->{'href'};
3634        }
3635}
3636
3637## ......................................................................
3638## parse to array of hashes functions
3639
3640sub git_get_heads_list {
3641        my ($limit, @classes) = @_;
3642        @classes = ('heads') unless @classes;
3643        my @patterns = map { "refs/$_" } @classes;
3644        my @headslist;
3645
3646        open my $fd, '-|', git_cmd(), 'for-each-ref',
3647                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3648                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3649                @patterns
3650                or return;
3651        while (my $line = <$fd>) {
3652                my %ref_item;
3653
3654                chomp $line;
3655                my ($refinfo, $committerinfo) = split(/\0/, $line);
3656                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3657                my ($committer, $epoch, $tz) =
3658                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3659                $ref_item{'fullname'}  = $name;
3660                $name =~ s!^refs/(?:head|remote)s/!!;
3661
3662                $ref_item{'name'}  = $name;
3663                $ref_item{'id'}    = $hash;
3664                $ref_item{'title'} = $title || '(no commit message)';
3665                $ref_item{'epoch'} = $epoch;
3666                if ($epoch) {
3667                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3668                } else {
3669                        $ref_item{'age'} = "unknown";
3670                }
3671
3672                push @headslist, \%ref_item;
3673        }
3674        close $fd;
3675
3676        return wantarray ? @headslist : \@headslist;
3677}
3678
3679sub git_get_tags_list {
3680        my $limit = shift;
3681        my @tagslist;
3682
3683        open my $fd, '-|', git_cmd(), 'for-each-ref',
3684                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3685                '--format=%(objectname) %(objecttype) %(refname) '.
3686                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3687                'refs/tags'
3688                or return;
3689        while (my $line = <$fd>) {
3690                my %ref_item;
3691
3692                chomp $line;
3693                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3694                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3695                my ($creator, $epoch, $tz) =
3696                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3697                $ref_item{'fullname'} = $name;
3698                $name =~ s!^refs/tags/!!;
3699
3700                $ref_item{'type'} = $type;
3701                $ref_item{'id'} = $id;
3702                $ref_item{'name'} = $name;
3703                if ($type eq "tag") {
3704                        $ref_item{'subject'} = $title;
3705                        $ref_item{'reftype'} = $reftype;
3706                        $ref_item{'refid'}   = $refid;
3707                } else {
3708                        $ref_item{'reftype'} = $type;
3709                        $ref_item{'refid'}   = $id;
3710                }
3711
3712                if ($type eq "tag" || $type eq "commit") {
3713                        $ref_item{'epoch'} = $epoch;
3714                        if ($epoch) {
3715                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3716                        } else {
3717                                $ref_item{'age'} = "unknown";
3718                        }
3719                }
3720
3721                push @tagslist, \%ref_item;
3722        }
3723        close $fd;
3724
3725        return wantarray ? @tagslist : \@tagslist;
3726}
3727
3728## ----------------------------------------------------------------------
3729## filesystem-related functions
3730
3731sub get_file_owner {
3732        my $path = shift;
3733
3734        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3735        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3736        if (!defined $gcos) {
3737                return undef;
3738        }
3739        my $owner = $gcos;
3740        $owner =~ s/[,;].*$//;
3741        return to_utf8($owner);
3742}
3743
3744# assume that file exists
3745sub insert_file {
3746        my $filename = shift;
3747
3748        open my $fd, '<', $filename;
3749        print map { to_utf8($_) } <$fd>;
3750        close $fd;
3751}
3752
3753## ......................................................................
3754## mimetype related functions
3755
3756sub mimetype_guess_file {
3757        my $filename = shift;
3758        my $mimemap = shift;
3759        -r $mimemap or return undef;
3760
3761        my %mimemap;
3762        open(my $mh, '<', $mimemap) or return undef;
3763        while (<$mh>) {
3764                next if m/^#/; # skip comments
3765                my ($mimetype, @exts) = split(/\s+/);
3766                foreach my $ext (@exts) {
3767                        $mimemap{$ext} = $mimetype;
3768                }
3769        }
3770        close($mh);
3771
3772        $filename =~ /\.([^.]*)$/;
3773        return $mimemap{$1};
3774}
3775
3776sub mimetype_guess {
3777        my $filename = shift;
3778        my $mime;
3779        $filename =~ /\./ or return undef;
3780
3781        if ($mimetypes_file) {
3782                my $file = $mimetypes_file;
3783                if ($file !~ m!^/!) { # if it is relative path
3784                        # it is relative to project
3785                        $file = "$projectroot/$project/$file";
3786                }
3787                $mime = mimetype_guess_file($filename, $file);
3788        }
3789        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3790        return $mime;
3791}
3792
3793sub blob_mimetype {
3794        my $fd = shift;
3795        my $filename = shift;
3796
3797        if ($filename) {
3798                my $mime = mimetype_guess($filename);
3799                $mime and return $mime;
3800        }
3801
3802        # just in case
3803        return $default_blob_plain_mimetype unless $fd;
3804
3805        if (-T $fd) {
3806                return 'text/plain';
3807        } elsif (! $filename) {
3808                return 'application/octet-stream';
3809        } elsif ($filename =~ m/\.png$/i) {
3810                return 'image/png';
3811        } elsif ($filename =~ m/\.gif$/i) {
3812                return 'image/gif';
3813        } elsif ($filename =~ m/\.jpe?g$/i) {
3814                return 'image/jpeg';
3815        } else {
3816                return 'application/octet-stream';
3817        }
3818}
3819
3820sub blob_contenttype {
3821        my ($fd, $file_name, $type) = @_;
3822
3823        $type ||= blob_mimetype($fd, $file_name);
3824        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3825                $type .= "; charset=$default_text_plain_charset";
3826        }
3827
3828        return $type;
3829}
3830
3831# guess file syntax for syntax highlighting; return undef if no highlighting
3832# the name of syntax can (in the future) depend on syntax highlighter used
3833sub guess_file_syntax {
3834        my ($highlight, $mimetype, $file_name) = @_;
3835        return undef unless ($highlight && defined $file_name);
3836        my $basename = basename($file_name, '.in');
3837        return $highlight_basename{$basename}
3838                if exists $highlight_basename{$basename};
3839
3840        $basename =~ /\.([^.]*)$/;
3841        my $ext = $1 or return undef;
3842        return $highlight_ext{$ext}
3843                if exists $highlight_ext{$ext};
3844
3845        return undef;
3846}
3847
3848# run highlighter and return FD of its output,
3849# or return original FD if no highlighting
3850sub run_highlighter {
3851        my ($fd, $highlight, $syntax) = @_;
3852        return $fd unless ($highlight && defined $syntax);
3853
3854        close $fd;
3855        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3856                  quote_command($highlight_bin).
3857                  " --replace-tabs=8 --fragment --syntax $syntax |"
3858                or die_error(500, "Couldn't open file or run syntax highlighter");
3859        return $fd;
3860}
3861
3862## ======================================================================
3863## functions printing HTML: header, footer, error page
3864
3865sub get_page_title {
3866        my $title = to_utf8($site_name);
3867
3868        unless (defined $project) {
3869                if (defined $project_filter) {
3870                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3871                }
3872                return $title;
3873        }
3874        $title .= " - " . to_utf8($project);
3875
3876        return $title unless (defined $action);
3877        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3878
3879        return $title unless (defined $file_name);
3880        $title .= " - " . esc_path($file_name);
3881        if ($action eq "tree" && $file_name !~ m|/$|) {
3882                $title .= "/";
3883        }
3884
3885        return $title;
3886}
3887
3888sub get_content_type_html {
3889        # require explicit support from the UA if we are to send the page as
3890        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3891        # we have to do this because MSIE sometimes globs '*/*', pretending to
3892        # support xhtml+xml but choking when it gets what it asked for.
3893        if (defined $cgi->http('HTTP_ACCEPT') &&
3894            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3895            $cgi->Accept('application/xhtml+xml') != 0) {
3896                return 'application/xhtml+xml';
3897        } else {
3898                return 'text/html';
3899        }
3900}
3901
3902sub print_feed_meta {
3903        if (defined $project) {
3904                my %href_params = get_feed_info();
3905                if (!exists $href_params{'-title'}) {
3906                        $href_params{'-title'} = 'log';
3907                }
3908
3909                foreach my $format (qw(RSS Atom)) {
3910                        my $type = lc($format);
3911                        my %link_attr = (
3912                                '-rel' => 'alternate',
3913                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3914                                '-type' => "application/$type+xml"
3915                        );
3916
3917                        $href_params{'extra_options'} = undef;
3918                        $href_params{'action'} = $type;
3919                        $link_attr{'-href'} = href(%href_params);
3920                        print "<link ".
3921                              "rel=\"$link_attr{'-rel'}\" ".
3922                              "title=\"$link_attr{'-title'}\" ".
3923                              "href=\"$link_attr{'-href'}\" ".
3924                              "type=\"$link_attr{'-type'}\" ".
3925                              "/>\n";
3926
3927                        $href_params{'extra_options'} = '--no-merges';
3928                        $link_attr{'-href'} = href(%href_params);
3929                        $link_attr{'-title'} .= ' (no merges)';
3930                        print "<link ".
3931                              "rel=\"$link_attr{'-rel'}\" ".
3932                              "title=\"$link_attr{'-title'}\" ".
3933                              "href=\"$link_attr{'-href'}\" ".
3934                              "type=\"$link_attr{'-type'}\" ".
3935                              "/>\n";
3936                }
3937
3938        } else {
3939                printf('<link rel="alternate" title="%s projects list" '.
3940                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3941                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3942                printf('<link rel="alternate" title="%s projects feeds" '.
3943                       'href="%s" type="text/x-opml" />'."\n",
3944                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3945        }
3946}
3947
3948sub print_header_links {
3949        my $status = shift;
3950
3951        # print out each stylesheet that exist, providing backwards capability
3952        # for those people who defined $stylesheet in a config file
3953        if (defined $stylesheet) {
3954                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3955        } else {
3956                foreach my $stylesheet (@stylesheets) {
3957                        next unless $stylesheet;
3958                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3959                }
3960        }
3961        print_feed_meta()
3962                if ($status eq '200 OK');
3963        if (defined $favicon) {
3964                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3965        }
3966}
3967
3968sub print_nav_breadcrumbs_path {
3969        my $dirprefix = undef;
3970        while (my $part = shift) {
3971                $dirprefix .= "/" if defined $dirprefix;
3972                $dirprefix .= $part;
3973                print $cgi->a({-href => href(project => undef,
3974                                             project_filter => $dirprefix,
3975                                             action => "project_list")},
3976                              esc_html($part)) . " / ";
3977        }
3978}
3979
3980sub print_nav_breadcrumbs {
3981        my %opts = @_;
3982
3983        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3984        if (defined $project) {
3985                my @dirname = split '/', $project;
3986                my $projectbasename = pop @dirname;
3987                print_nav_breadcrumbs_path(@dirname);
3988                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3989                if (defined $action) {
3990                        my $action_print = $action ;
3991                        if (defined $opts{-action_extra}) {
3992                                $action_print = $cgi->a({-href => href(action=>$action)},
3993                                        $action);
3994                        }
3995                        print " / $action_print";
3996                }
3997                if (defined $opts{-action_extra}) {
3998                        print " / $opts{-action_extra}";
3999                }
4000                print "\n";
4001        } elsif (defined $project_filter) {
4002                print_nav_breadcrumbs_path(split '/', $project_filter);
4003        }
4004}
4005
4006sub print_search_form {
4007        if (!defined $searchtext) {
4008                $searchtext = "";
4009        }
4010        my $search_hash;
4011        if (defined $hash_base) {
4012                $search_hash = $hash_base;
4013        } elsif (defined $hash) {
4014                $search_hash = $hash;
4015        } else {
4016                $search_hash = "HEAD";
4017        }
4018        my $action = $my_uri;
4019        my $use_pathinfo = gitweb_check_feature('pathinfo');
4020        if ($use_pathinfo) {
4021                $action .= "/".esc_url($project);
4022        }
4023        print $cgi->startform(-method => "get", -action => $action) .
4024              "<div class=\"search\">\n" .
4025              (!$use_pathinfo &&
4026              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4027              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4028              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4029              $cgi->popup_menu(-name => 'st', -default => 'commit',
4030                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4031              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4032              " search:\n",
4033              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4034              "<span title=\"Extended regular expression\">" .
4035              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4036                             -checked => $search_use_regexp) .
4037              "</span>" .
4038              "</div>" .
4039              $cgi->end_form() . "\n";
4040}
4041
4042sub git_header_html {
4043        my $status = shift || "200 OK";
4044        my $expires = shift;
4045        my %opts = @_;
4046
4047        my $title = get_page_title();
4048        my $content_type = get_content_type_html();
4049        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4050                           -status=> $status, -expires => $expires)
4051                unless ($opts{'-no_http_header'});
4052        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4053        print <<EOF;
4054<?xml version="1.0" encoding="utf-8"?>
4055<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4056<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4057<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4058<!-- git core binaries version $git_version -->
4059<head>
4060<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4061<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4062<meta name="robots" content="index, nofollow"/>
4063<title>$title</title>
4064EOF
4065        # the stylesheet, favicon etc urls won't work correctly with path_info
4066        # unless we set the appropriate base URL
4067        if ($ENV{'PATH_INFO'}) {
4068                print "<base href=\"".esc_url($base_url)."\" />\n";
4069        }
4070        print_header_links($status);
4071
4072        if (defined $site_html_head_string) {
4073                print to_utf8($site_html_head_string);
4074        }
4075
4076        print "</head>\n" .
4077              "<body>\n";
4078
4079        if (defined $site_header && -f $site_header) {
4080                insert_file($site_header);
4081        }
4082
4083        print "<div class=\"page_header\">\n";
4084        if (defined $logo) {
4085                print $cgi->a({-href => esc_url($logo_url),
4086                               -title => $logo_label},
4087                              $cgi->img({-src => esc_url($logo),
4088                                         -width => 72, -height => 27,
4089                                         -alt => "git",
4090                                         -class => "logo"}));
4091        }
4092        print_nav_breadcrumbs(%opts);
4093        print "</div>\n";
4094
4095        my $have_search = gitweb_check_feature('search');
4096        if (defined $project && $have_search) {
4097                print_search_form();
4098        }
4099}
4100
4101sub git_footer_html {
4102        my $feed_class = 'rss_logo';
4103
4104        print "<div class=\"page_footer\">\n";
4105        if (defined $project) {
4106                my $descr = git_get_project_description($project);
4107                if (defined $descr) {
4108                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4109                }
4110
4111                my %href_params = get_feed_info();
4112                if (!%href_params) {
4113                        $feed_class .= ' generic';
4114                }
4115                $href_params{'-title'} ||= 'log';
4116
4117                foreach my $format (qw(RSS Atom)) {
4118                        $href_params{'action'} = lc($format);
4119                        print $cgi->a({-href => href(%href_params),
4120                                      -title => "$href_params{'-title'} $format feed",
4121                                      -class => $feed_class}, $format)."\n";
4122                }
4123
4124        } else {
4125                print $cgi->a({-href => href(project=>undef, action=>"opml",
4126                                             project_filter => $project_filter),
4127                              -class => $feed_class}, "OPML") . " ";
4128                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4129                                             project_filter => $project_filter),
4130                              -class => $feed_class}, "TXT") . "\n";
4131        }
4132        print "</div>\n"; # class="page_footer"
4133
4134        if (defined $t0 && gitweb_check_feature('timed')) {
4135                print "<div id=\"generating_info\">\n";
4136                print 'This page took '.
4137                      '<span id="generating_time" class="time_span">'.
4138                      tv_interval($t0, [ gettimeofday() ]).
4139                      ' seconds </span>'.
4140                      ' and '.
4141                      '<span id="generating_cmd">'.
4142                      $number_of_git_cmds.
4143                      '</span> git commands '.
4144                      " to generate.\n";
4145                print "</div>\n"; # class="page_footer"
4146        }
4147
4148        if (defined $site_footer && -f $site_footer) {
4149                insert_file($site_footer);
4150        }
4151
4152        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4153        if (defined $action &&
4154            $action eq 'blame_incremental') {
4155                print qq!<script type="text/javascript">\n!.
4156                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4157                      qq!           "!. href() .qq!");\n!.
4158                      qq!</script>\n!;
4159        } else {
4160                my ($jstimezone, $tz_cookie, $datetime_class) =
4161                        gitweb_get_feature('javascript-timezone');
4162
4163                print qq!<script type="text/javascript">\n!.
4164                      qq!window.onload = function () {\n!;
4165                if (gitweb_check_feature('javascript-actions')) {
4166                        print qq!       fixLinks();\n!;
4167                }
4168                if ($jstimezone && $tz_cookie && $datetime_class) {
4169                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4170                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4171                }
4172                print qq!};\n!.
4173                      qq!</script>\n!;
4174        }
4175
4176        print "</body>\n" .
4177              "</html>";
4178}
4179
4180# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4181# Example: die_error(404, 'Hash not found')
4182# By convention, use the following status codes (as defined in RFC 2616):
4183# 400: Invalid or missing CGI parameters, or
4184#      requested object exists but has wrong type.
4185# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4186#      this server or project.
4187# 404: Requested object/revision/project doesn't exist.
4188# 500: The server isn't configured properly, or
4189#      an internal error occurred (e.g. failed assertions caused by bugs), or
4190#      an unknown error occurred (e.g. the git binary died unexpectedly).
4191# 503: The server is currently unavailable (because it is overloaded,
4192#      or down for maintenance).  Generally, this is a temporary state.
4193sub die_error {
4194        my $status = shift || 500;
4195        my $error = esc_html(shift) || "Internal Server Error";
4196        my $extra = shift;
4197        my %opts = @_;
4198
4199        my %http_responses = (
4200                400 => '400 Bad Request',
4201                403 => '403 Forbidden',
4202                404 => '404 Not Found',
4203                500 => '500 Internal Server Error',
4204                503 => '503 Service Unavailable',
4205        );
4206        git_header_html($http_responses{$status}, undef, %opts);
4207        print <<EOF;
4208<div class="page_body">
4209<br /><br />
4210$status - $error
4211<br />
4212EOF
4213        if (defined $extra) {
4214                print "<hr />\n" .
4215                      "$extra\n";
4216        }
4217        print "</div>\n";
4218
4219        git_footer_html();
4220        goto DONE_GITWEB
4221                unless ($opts{'-error_handler'});
4222}
4223
4224## ----------------------------------------------------------------------
4225## functions printing or outputting HTML: navigation
4226
4227sub git_print_page_nav {
4228        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4229        $extra = '' if !defined $extra; # pager or formats
4230
4231        my @navs = qw(summary shortlog log commit commitdiff tree);
4232        if ($suppress) {
4233                @navs = grep { $_ ne $suppress } @navs;
4234        }
4235
4236        my %arg = map { $_ => {action=>$_} } @navs;
4237        if (defined $head) {
4238                for (qw(commit commitdiff)) {
4239                        $arg{$_}{'hash'} = $head;
4240                }
4241                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4242                        for (qw(shortlog log)) {
4243                                $arg{$_}{'hash'} = $head;
4244                        }
4245                }
4246        }
4247
4248        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4249        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4250
4251        my @actions = gitweb_get_feature('actions');
4252        my %repl = (
4253                '%' => '%',
4254                'n' => $project,         # project name
4255                'f' => $git_dir,         # project path within filesystem
4256                'h' => $treehead || '',  # current hash ('h' parameter)
4257                'b' => $treebase || '',  # hash base ('hb' parameter)
4258        );
4259        while (@actions) {
4260                my ($label, $link, $pos) = splice(@actions,0,3);
4261                # insert
4262                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4263                # munch munch
4264                $link =~ s/%([%nfhb])/$repl{$1}/g;
4265                $arg{$label}{'_href'} = $link;
4266        }
4267
4268        print "<div class=\"page_nav\">\n" .
4269                (join " | ",
4270                 map { $_ eq $current ?
4271                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4272                 } @navs);
4273        print "<br/>\n$extra<br/>\n" .
4274              "</div>\n";
4275}
4276
4277# returns a submenu for the nagivation of the refs views (tags, heads,
4278# remotes) with the current view disabled and the remotes view only
4279# available if the feature is enabled
4280sub format_ref_views {
4281        my ($current) = @_;
4282        my @ref_views = qw{tags heads};
4283        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4284        return join " | ", map {
4285                $_ eq $current ? $_ :
4286                $cgi->a({-href => href(action=>$_)}, $_)
4287        } @ref_views
4288}
4289
4290sub format_paging_nav {
4291        my ($action, $page, $has_next_link) = @_;
4292        my $paging_nav;
4293
4294
4295        if ($page > 0) {
4296                $paging_nav .=
4297                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4298                        " &sdot; " .
4299                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4300                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4301        } else {
4302                $paging_nav .= "first &sdot; prev";
4303        }
4304
4305        if ($has_next_link) {
4306                $paging_nav .= " &sdot; " .
4307                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4308                                 -accesskey => "n", -title => "Alt-n"}, "next");
4309        } else {
4310                $paging_nav .= " &sdot; next";
4311        }
4312
4313        return $paging_nav;
4314}
4315
4316## ......................................................................
4317## functions printing or outputting HTML: div
4318
4319sub git_print_header_div {
4320        my ($action, $title, $hash, $hash_base) = @_;
4321        my %args = ();
4322
4323        $args{'action'} = $action;
4324        $args{'hash'} = $hash if $hash;
4325        $args{'hash_base'} = $hash_base if $hash_base;
4326
4327        print "<div class=\"header\">\n" .
4328              $cgi->a({-href => href(%args), -class => "title"},
4329              $title ? $title : $action) .
4330              "\n</div>\n";
4331}
4332
4333sub format_repo_url {
4334        my ($name, $url) = @_;
4335        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4336}
4337
4338# Group output by placing it in a DIV element and adding a header.
4339# Options for start_div() can be provided by passing a hash reference as the
4340# first parameter to the function.
4341# Options to git_print_header_div() can be provided by passing an array
4342# reference. This must follow the options to start_div if they are present.
4343# The content can be a scalar, which is output as-is, a scalar reference, which
4344# is output after html escaping, an IO handle passed either as *handle or
4345# *handle{IO}, or a function reference. In the latter case all following
4346# parameters will be taken as argument to the content function call.
4347sub git_print_section {
4348        my ($div_args, $header_args, $content);
4349        my $arg = shift;
4350        if (ref($arg) eq 'HASH') {
4351                $div_args = $arg;
4352                $arg = shift;
4353        }
4354        if (ref($arg) eq 'ARRAY') {
4355                $header_args = $arg;
4356                $arg = shift;
4357        }
4358        $content = $arg;
4359
4360        print $cgi->start_div($div_args);
4361        git_print_header_div(@$header_args);
4362
4363        if (ref($content) eq 'CODE') {
4364                $content->(@_);
4365        } elsif (ref($content) eq 'SCALAR') {
4366                print esc_html($$content);
4367        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4368                print <$content>;
4369        } elsif (!ref($content) && defined($content)) {
4370                print $content;
4371        }
4372
4373        print $cgi->end_div;
4374}
4375
4376sub format_timestamp_html {
4377        my $date = shift;
4378        my $strtime = $date->{'rfc2822'};
4379
4380        my (undef, undef, $datetime_class) =
4381                gitweb_get_feature('javascript-timezone');
4382        if ($datetime_class) {
4383                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4384        }
4385
4386        my $localtime_format = '(%02d:%02d %s)';
4387        if ($date->{'hour_local'} < 6) {
4388                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4389        }
4390        $strtime .= ' ' .
4391                    sprintf($localtime_format,
4392                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4393
4394        return $strtime;
4395}
4396
4397# Outputs the author name and date in long form
4398sub git_print_authorship {
4399        my $co = shift;
4400        my %opts = @_;
4401        my $tag = $opts{-tag} || 'div';
4402        my $author = $co->{'author_name'};
4403
4404        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4405        print "<$tag class=\"author_date\">" .
4406              format_search_author($author, "author", esc_html($author)) .
4407              " [".format_timestamp_html(\%ad)."]".
4408              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4409              "</$tag>\n";
4410}
4411
4412# Outputs table rows containing the full author or committer information,
4413# in the format expected for 'commit' view (& similar).
4414# Parameters are a commit hash reference, followed by the list of people
4415# to output information for. If the list is empty it defaults to both
4416# author and committer.
4417sub git_print_authorship_rows {
4418        my $co = shift;
4419        # too bad we can't use @people = @_ || ('author', 'committer')
4420        my @people = @_;
4421        @people = ('author', 'committer') unless @people;
4422        foreach my $who (@people) {
4423                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4424                print "<tr><td>$who</td><td>" .
4425                      format_search_author($co->{"${who}_name"}, $who,
4426                                           esc_html($co->{"${who}_name"})) . " " .
4427                      format_search_author($co->{"${who}_email"}, $who,
4428                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4429                      "</td><td rowspan=\"2\">" .
4430                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4431                      "</td></tr>\n" .
4432                      "<tr>" .
4433                      "<td></td><td>" .
4434                      format_timestamp_html(\%wd) .
4435                      "</td>" .
4436                      "</tr>\n";
4437        }
4438}
4439
4440sub git_print_page_path {
4441        my $name = shift;
4442        my $type = shift;
4443        my $hb = shift;
4444
4445
4446        print "<div class=\"page_path\">";
4447        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4448                      -title => 'tree root'}, to_utf8("[$project]"));
4449        print " / ";
4450        if (defined $name) {
4451                my @dirname = split '/', $name;
4452                my $basename = pop @dirname;
4453                my $fullname = '';
4454
4455                foreach my $dir (@dirname) {
4456                        $fullname .= ($fullname ? '/' : '') . $dir;
4457                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4458                                                     hash_base=>$hb),
4459                                      -title => $fullname}, esc_path($dir));
4460                        print " / ";
4461                }
4462                if (defined $type && $type eq 'blob') {
4463                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4464                                                     hash_base=>$hb),
4465                                      -title => $name}, esc_path($basename));
4466                } elsif (defined $type && $type eq 'tree') {
4467                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4468                                                     hash_base=>$hb),
4469                                      -title => $name}, esc_path($basename));
4470                        print " / ";
4471                } else {
4472                        print esc_path($basename);
4473                }
4474        }
4475        print "<br/></div>\n";
4476}
4477
4478sub git_print_log {
4479        my $log = shift;
4480        my %opts = @_;
4481
4482        if ($opts{'-remove_title'}) {
4483                # remove title, i.e. first line of log
4484                shift @$log;
4485        }
4486        # remove leading empty lines
4487        while (defined $log->[0] && $log->[0] eq "") {
4488                shift @$log;
4489        }
4490
4491        # print log
4492        my $signoff = 0;
4493        my $empty = 0;
4494        foreach my $line (@$log) {
4495                if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4496                        $signoff = 1;
4497                        $empty = 0;
4498                        if (! $opts{'-remove_signoff'}) {
4499                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4500                                next;
4501                        } else {
4502                                # remove signoff lines
4503                                next;
4504                        }
4505                } else {
4506                        $signoff = 0;
4507                }
4508
4509                # print only one empty line
4510                # do not print empty line after signoff
4511                if ($line eq "") {
4512                        next if ($empty || $signoff);
4513                        $empty = 1;
4514                } else {
4515                        $empty = 0;
4516                }
4517
4518                print format_log_line_html($line) . "<br/>\n";
4519        }
4520
4521        if ($opts{'-final_empty_line'}) {
4522                # end with single empty line
4523                print "<br/>\n" unless $empty;
4524        }
4525}
4526
4527# return link target (what link points to)
4528sub git_get_link_target {
4529        my $hash = shift;
4530        my $link_target;
4531
4532        # read link
4533        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4534                or return;
4535        {
4536                local $/ = undef;
4537                $link_target = <$fd>;
4538        }
4539        close $fd
4540                or return;
4541
4542        return $link_target;
4543}
4544
4545# given link target, and the directory (basedir) the link is in,
4546# return target of link relative to top directory (top tree);
4547# return undef if it is not possible (including absolute links).
4548sub normalize_link_target {
4549        my ($link_target, $basedir) = @_;
4550
4551        # absolute symlinks (beginning with '/') cannot be normalized
4552        return if (substr($link_target, 0, 1) eq '/');
4553
4554        # normalize link target to path from top (root) tree (dir)
4555        my $path;
4556        if ($basedir) {
4557                $path = $basedir . '/' . $link_target;
4558        } else {
4559                # we are in top (root) tree (dir)
4560                $path = $link_target;
4561        }
4562
4563        # remove //, /./, and /../
4564        my @path_parts;
4565        foreach my $part (split('/', $path)) {
4566                # discard '.' and ''
4567                next if (!$part || $part eq '.');
4568                # handle '..'
4569                if ($part eq '..') {
4570                        if (@path_parts) {
4571                                pop @path_parts;
4572                        } else {
4573                                # link leads outside repository (outside top dir)
4574                                return;
4575                        }
4576                } else {
4577                        push @path_parts, $part;
4578                }
4579        }
4580        $path = join('/', @path_parts);
4581
4582        return $path;
4583}
4584
4585# print tree entry (row of git_tree), but without encompassing <tr> element
4586sub git_print_tree_entry {
4587        my ($t, $basedir, $hash_base, $have_blame) = @_;
4588
4589        my %base_key = ();
4590        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4591
4592        # The format of a table row is: mode list link.  Where mode is
4593        # the mode of the entry, list is the name of the entry, an href,
4594        # and link is the action links of the entry.
4595
4596        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4597        if (exists $t->{'size'}) {
4598                print "<td class=\"size\">$t->{'size'}</td>\n";
4599        }
4600        if ($t->{'type'} eq "blob") {
4601                print "<td class=\"list\">" .
4602                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4603                                               file_name=>"$basedir$t->{'name'}", %base_key),
4604                                -class => "list"}, esc_path($t->{'name'}));
4605                if (S_ISLNK(oct $t->{'mode'})) {
4606                        my $link_target = git_get_link_target($t->{'hash'});
4607                        if ($link_target) {
4608                                my $norm_target = normalize_link_target($link_target, $basedir);
4609                                if (defined $norm_target) {
4610                                        print " -> " .
4611                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4612                                                                     file_name=>$norm_target),
4613                                                       -title => $norm_target}, esc_path($link_target));
4614                                } else {
4615                                        print " -> " . esc_path($link_target);
4616                                }
4617                        }
4618                }
4619                print "</td>\n";
4620                print "<td class=\"link\">";
4621                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4622                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4623                              "blob");
4624                if ($have_blame) {
4625                        print " | " .
4626                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4627                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4628                                      "blame");
4629                }
4630                if (defined $hash_base) {
4631                        print " | " .
4632                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4633                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4634                                      "history");
4635                }
4636                print " | " .
4637                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4638                                               file_name=>"$basedir$t->{'name'}")},
4639                                "raw");
4640                print "</td>\n";
4641
4642        } elsif ($t->{'type'} eq "tree") {
4643                print "<td class=\"list\">";
4644                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4645                                             file_name=>"$basedir$t->{'name'}",
4646                                             %base_key)},
4647                              esc_path($t->{'name'}));
4648                print "</td>\n";
4649                print "<td class=\"link\">";
4650                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4651                                             file_name=>"$basedir$t->{'name'}",
4652                                             %base_key)},
4653                              "tree");
4654                if (defined $hash_base) {
4655                        print " | " .
4656                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4657                                                     file_name=>"$basedir$t->{'name'}")},
4658                                      "history");
4659                }
4660                print "</td>\n";
4661        } else {
4662                # unknown object: we can only present history for it
4663                # (this includes 'commit' object, i.e. submodule support)
4664                print "<td class=\"list\">" .
4665                      esc_path($t->{'name'}) .
4666                      "</td>\n";
4667                print "<td class=\"link\">";
4668                if (defined $hash_base) {
4669                        print $cgi->a({-href => href(action=>"history",
4670                                                     hash_base=>$hash_base,
4671                                                     file_name=>"$basedir$t->{'name'}")},
4672                                      "history");
4673                }
4674                print "</td>\n";
4675        }
4676}
4677
4678## ......................................................................
4679## functions printing large fragments of HTML
4680
4681# get pre-image filenames for merge (combined) diff
4682sub fill_from_file_info {
4683        my ($diff, @parents) = @_;
4684
4685        $diff->{'from_file'} = [ ];
4686        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4687        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4688                if ($diff->{'status'}[$i] eq 'R' ||
4689                    $diff->{'status'}[$i] eq 'C') {
4690                        $diff->{'from_file'}[$i] =
4691                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4692                }
4693        }
4694
4695        return $diff;
4696}
4697
4698# is current raw difftree line of file deletion
4699sub is_deleted {
4700        my $diffinfo = shift;
4701
4702        return $diffinfo->{'to_id'} eq ('0' x 40);
4703}
4704
4705# does patch correspond to [previous] difftree raw line
4706# $diffinfo  - hashref of parsed raw diff format
4707# $patchinfo - hashref of parsed patch diff format
4708#              (the same keys as in $diffinfo)
4709sub is_patch_split {
4710        my ($diffinfo, $patchinfo) = @_;
4711
4712        return defined $diffinfo && defined $patchinfo
4713                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4714}
4715
4716
4717sub git_difftree_body {
4718        my ($difftree, $hash, @parents) = @_;
4719        my ($parent) = $parents[0];
4720        my $have_blame = gitweb_check_feature('blame');
4721        print "<div class=\"list_head\">\n";
4722        if ($#{$difftree} > 10) {
4723                print(($#{$difftree} + 1) . " files changed:\n");
4724        }
4725        print "</div>\n";
4726
4727        print "<table class=\"" .
4728              (@parents > 1 ? "combined " : "") .
4729              "diff_tree\">\n";
4730
4731        # header only for combined diff in 'commitdiff' view
4732        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4733        if ($has_header) {
4734                # table header
4735                print "<thead><tr>\n" .
4736                       "<th></th><th></th>\n"; # filename, patchN link
4737                for (my $i = 0; $i < @parents; $i++) {
4738                        my $par = $parents[$i];
4739                        print "<th>" .
4740                              $cgi->a({-href => href(action=>"commitdiff",
4741                                                     hash=>$hash, hash_parent=>$par),
4742                                       -title => 'commitdiff to parent number ' .
4743                                                  ($i+1) . ': ' . substr($par,0,7)},
4744                                      $i+1) .
4745                              "&nbsp;</th>\n";
4746                }
4747                print "</tr></thead>\n<tbody>\n";
4748        }
4749
4750        my $alternate = 1;
4751        my $patchno = 0;
4752        foreach my $line (@{$difftree}) {
4753                my $diff = parsed_difftree_line($line);
4754
4755                if ($alternate) {
4756                        print "<tr class=\"dark\">\n";
4757                } else {
4758                        print "<tr class=\"light\">\n";
4759                }
4760                $alternate ^= 1;
4761
4762                if (exists $diff->{'nparents'}) { # combined diff
4763
4764                        fill_from_file_info($diff, @parents)
4765                                unless exists $diff->{'from_file'};
4766
4767                        if (!is_deleted($diff)) {
4768                                # file exists in the result (child) commit
4769                                print "<td>" .
4770                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4771                                                             file_name=>$diff->{'to_file'},
4772                                                             hash_base=>$hash),
4773                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4774                                      "</td>\n";
4775                        } else {
4776                                print "<td>" .
4777                                      esc_path($diff->{'to_file'}) .
4778                                      "</td>\n";
4779                        }
4780
4781                        if ($action eq 'commitdiff') {
4782                                # link to patch
4783                                $patchno++;
4784                                print "<td class=\"link\">" .
4785                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4786                                              "patch") .
4787                                      " | " .
4788                                      "</td>\n";
4789                        }
4790
4791                        my $has_history = 0;
4792                        my $not_deleted = 0;
4793                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4794                                my $hash_parent = $parents[$i];
4795                                my $from_hash = $diff->{'from_id'}[$i];
4796                                my $from_path = $diff->{'from_file'}[$i];
4797                                my $status = $diff->{'status'}[$i];
4798
4799                                $has_history ||= ($status ne 'A');
4800                                $not_deleted ||= ($status ne 'D');
4801
4802                                if ($status eq 'A') {
4803                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4804                                } elsif ($status eq 'D') {
4805                                        print "<td class=\"link\">" .
4806                                              $cgi->a({-href => href(action=>"blob",
4807                                                                     hash_base=>$hash,
4808                                                                     hash=>$from_hash,
4809                                                                     file_name=>$from_path)},
4810                                                      "blob" . ($i+1)) .
4811                                              " | </td>\n";
4812                                } else {
4813                                        if ($diff->{'to_id'} eq $from_hash) {
4814                                                print "<td class=\"link nochange\">";
4815                                        } else {
4816                                                print "<td class=\"link\">";
4817                                        }
4818                                        print $cgi->a({-href => href(action=>"blobdiff",
4819                                                                     hash=>$diff->{'to_id'},
4820                                                                     hash_parent=>$from_hash,
4821                                                                     hash_base=>$hash,
4822                                                                     hash_parent_base=>$hash_parent,
4823                                                                     file_name=>$diff->{'to_file'},
4824                                                                     file_parent=>$from_path)},
4825                                                      "diff" . ($i+1)) .
4826                                              " | </td>\n";
4827                                }
4828                        }
4829
4830                        print "<td class=\"link\">";
4831                        if ($not_deleted) {
4832                                print $cgi->a({-href => href(action=>"blob",
4833                                                             hash=>$diff->{'to_id'},
4834                                                             file_name=>$diff->{'to_file'},
4835                                                             hash_base=>$hash)},
4836                                              "blob");
4837                                print " | " if ($has_history);
4838                        }
4839                        if ($has_history) {
4840                                print $cgi->a({-href => href(action=>"history",
4841                                                             file_name=>$diff->{'to_file'},
4842                                                             hash_base=>$hash)},
4843                                              "history");
4844                        }
4845                        print "</td>\n";
4846
4847                        print "</tr>\n";
4848                        next; # instead of 'else' clause, to avoid extra indent
4849                }
4850                # else ordinary diff
4851
4852                my ($to_mode_oct, $to_mode_str, $to_file_type);
4853                my ($from_mode_oct, $from_mode_str, $from_file_type);
4854                if ($diff->{'to_mode'} ne ('0' x 6)) {
4855                        $to_mode_oct = oct $diff->{'to_mode'};
4856                        if (S_ISREG($to_mode_oct)) { # only for regular file
4857                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4858                        }
4859                        $to_file_type = file_type($diff->{'to_mode'});
4860                }
4861                if ($diff->{'from_mode'} ne ('0' x 6)) {
4862                        $from_mode_oct = oct $diff->{'from_mode'};
4863                        if (S_ISREG($from_mode_oct)) { # only for regular file
4864                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4865                        }
4866                        $from_file_type = file_type($diff->{'from_mode'});
4867                }
4868
4869                if ($diff->{'status'} eq "A") { # created
4870                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4871                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4872                        $mode_chng   .= "]</span>";
4873                        print "<td>";
4874                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4875                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4876                                      -class => "list"}, esc_path($diff->{'file'}));
4877                        print "</td>\n";
4878                        print "<td>$mode_chng</td>\n";
4879                        print "<td class=\"link\">";
4880                        if ($action eq 'commitdiff') {
4881                                # link to patch
4882                                $patchno++;
4883                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4884                                              "patch") .
4885                                      " | ";
4886                        }
4887                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4888                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4889                                      "blob");
4890                        print "</td>\n";
4891
4892                } elsif ($diff->{'status'} eq "D") { # deleted
4893                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4894                        print "<td>";
4895                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4896                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4897                                       -class => "list"}, esc_path($diff->{'file'}));
4898                        print "</td>\n";
4899                        print "<td>$mode_chng</td>\n";
4900                        print "<td class=\"link\">";
4901                        if ($action eq 'commitdiff') {
4902                                # link to patch
4903                                $patchno++;
4904                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4905                                              "patch") .
4906                                      " | ";
4907                        }
4908                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4909                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4910                                      "blob") . " | ";
4911                        if ($have_blame) {
4912                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4913                                                             file_name=>$diff->{'file'})},
4914                                              "blame") . " | ";
4915                        }
4916                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4917                                                     file_name=>$diff->{'file'})},
4918                                      "history");
4919                        print "</td>\n";
4920
4921                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4922                        my $mode_chnge = "";
4923                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4924                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4925                                if ($from_file_type ne $to_file_type) {
4926                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4927                                }
4928                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4929                                        if ($from_mode_str && $to_mode_str) {
4930                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4931                                        } elsif ($to_mode_str) {
4932                                                $mode_chnge .= " mode: $to_mode_str";
4933                                        }
4934                                }
4935                                $mode_chnge .= "]</span>\n";
4936                        }
4937                        print "<td>";
4938                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4939                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4940                                      -class => "list"}, esc_path($diff->{'file'}));
4941                        print "</td>\n";
4942                        print "<td>$mode_chnge</td>\n";
4943                        print "<td class=\"link\">";
4944                        if ($action eq 'commitdiff') {
4945                                # link to patch
4946                                $patchno++;
4947                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4948                                              "patch") .
4949                                      " | ";
4950                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4951                                # "commit" view and modified file (not onlu mode changed)
4952                                print $cgi->a({-href => href(action=>"blobdiff",
4953                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4954                                                             hash_base=>$hash, hash_parent_base=>$parent,
4955                                                             file_name=>$diff->{'file'})},
4956                                              "diff") .
4957                                      " | ";
4958                        }
4959                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4960                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4961                                       "blob") . " | ";
4962                        if ($have_blame) {
4963                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4964                                                             file_name=>$diff->{'file'})},
4965                                              "blame") . " | ";
4966                        }
4967                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4968                                                     file_name=>$diff->{'file'})},
4969                                      "history");
4970                        print "</td>\n";
4971
4972                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4973                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4974                        my $nstatus = $status_name{$diff->{'status'}};
4975                        my $mode_chng = "";
4976                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4977                                # mode also for directories, so we cannot use $to_mode_str
4978                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4979                        }
4980                        print "<td>" .
4981                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4982                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4983                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4984                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4985                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4986                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4987                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4988                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4989                              "<td class=\"link\">";
4990                        if ($action eq 'commitdiff') {
4991                                # link to patch
4992                                $patchno++;
4993                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4994                                              "patch") .
4995                                      " | ";
4996                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4997                                # "commit" view and modified file (not only pure rename or copy)
4998                                print $cgi->a({-href => href(action=>"blobdiff",
4999                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5000                                                             hash_base=>$hash, hash_parent_base=>$parent,
5001                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5002                                              "diff") .
5003                                      " | ";
5004                        }
5005                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5006                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
5007                                      "blob") . " | ";
5008                        if ($have_blame) {
5009                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5010                                                             file_name=>$diff->{'to_file'})},
5011                                              "blame") . " | ";
5012                        }
5013                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5014                                                    file_name=>$diff->{'to_file'})},
5015                                      "history");
5016                        print "</td>\n";
5017
5018                } # we should not encounter Unmerged (U) or Unknown (X) status
5019                print "</tr>\n";
5020        }
5021        print "</tbody>" if $has_header;
5022        print "</table>\n";
5023}
5024
5025# Print context lines and then rem/add lines in a side-by-side manner.
5026sub print_sidebyside_diff_lines {
5027        my ($ctx, $rem, $add) = @_;
5028
5029        # print context block before add/rem block
5030        if (@$ctx) {
5031                print join '',
5032                        '<div class="chunk_block ctx">',
5033                                '<div class="old">',
5034                                @$ctx,
5035                                '</div>',
5036                                '<div class="new">',
5037                                @$ctx,
5038                                '</div>',
5039                        '</div>';
5040        }
5041
5042        if (!@$add) {
5043                # pure removal
5044                print join '',
5045                        '<div class="chunk_block rem">',
5046                                '<div class="old">',
5047                                @$rem,
5048                                '</div>',
5049                        '</div>';
5050        } elsif (!@$rem) {
5051                # pure addition
5052                print join '',
5053                        '<div class="chunk_block add">',
5054                                '<div class="new">',
5055                                @$add,
5056                                '</div>',
5057                        '</div>';
5058        } else {
5059                print join '',
5060                        '<div class="chunk_block chg">',
5061                                '<div class="old">',
5062                                @$rem,
5063                                '</div>',
5064                                '<div class="new">',
5065                                @$add,
5066                                '</div>',
5067                        '</div>';
5068        }
5069}
5070
5071# Print context lines and then rem/add lines in inline manner.
5072sub print_inline_diff_lines {
5073        my ($ctx, $rem, $add) = @_;
5074
5075        print @$ctx, @$rem, @$add;
5076}
5077
5078# Format removed and added line, mark changed part and HTML-format them.
5079# Implementation is based on contrib/diff-highlight
5080sub format_rem_add_lines_pair {
5081        my ($rem, $add, $num_parents) = @_;
5082
5083        # We need to untabify lines before split()'ing them;
5084        # otherwise offsets would be invalid.
5085        chomp $rem;
5086        chomp $add;
5087        $rem = untabify($rem);
5088        $add = untabify($add);
5089
5090        my @rem = split(//, $rem);
5091        my @add = split(//, $add);
5092        my ($esc_rem, $esc_add);
5093        # Ignore leading +/- characters for each parent.
5094        my ($prefix_len, $suffix_len) = ($num_parents, 0);
5095        my ($prefix_has_nonspace, $suffix_has_nonspace);
5096
5097        my $shorter = (@rem < @add) ? @rem : @add;
5098        while ($prefix_len < $shorter) {
5099                last if ($rem[$prefix_len] ne $add[$prefix_len]);
5100
5101                $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5102                $prefix_len++;
5103        }
5104
5105        while ($prefix_len + $suffix_len < $shorter) {
5106                last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5107
5108                $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5109                $suffix_len++;
5110        }
5111
5112        # Mark lines that are different from each other, but have some common
5113        # part that isn't whitespace.  If lines are completely different, don't
5114        # mark them because that would make output unreadable, especially if
5115        # diff consists of multiple lines.
5116        if ($prefix_has_nonspace || $suffix_has_nonspace) {
5117                $esc_rem = esc_html_hl_regions($rem, 'marked',
5118                        [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5119                $esc_add = esc_html_hl_regions($add, 'marked',
5120                        [$prefix_len, @add - $suffix_len], -nbsp=>1);
5121        } else {
5122                $esc_rem = esc_html($rem, -nbsp=>1);
5123                $esc_add = esc_html($add, -nbsp=>1);
5124        }
5125
5126        return format_diff_line(\$esc_rem, 'rem'),
5127               format_diff_line(\$esc_add, 'add');
5128}
5129
5130# HTML-format diff context, removed and added lines.
5131sub format_ctx_rem_add_lines {
5132        my ($ctx, $rem, $add, $num_parents) = @_;
5133        my (@new_ctx, @new_rem, @new_add);
5134        my $can_highlight = 0;
5135        my $is_combined = ($num_parents > 1);
5136
5137        # Highlight if every removed line has a corresponding added line.
5138        if (@$add > 0 && @$add == @$rem) {
5139                $can_highlight = 1;
5140
5141                # Highlight lines in combined diff only if the chunk contains
5142                # diff between the same version, e.g.
5143                #
5144                #    - a
5145                #   -  b
5146                #    + c
5147                #   +  d
5148                #
5149                # Otherwise the highlightling would be confusing.
5150                if ($is_combined) {
5151                        for (my $i = 0; $i < @$add; $i++) {
5152                                my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5153                                my $prefix_add = substr($add->[$i], 0, $num_parents);
5154
5155                                $prefix_rem =~ s/-/+/g;
5156
5157                                if ($prefix_rem ne $prefix_add) {
5158                                        $can_highlight = 0;
5159                                        last;
5160                                }
5161                        }
5162                }
5163        }
5164
5165        if ($can_highlight) {
5166                for (my $i = 0; $i < @$add; $i++) {
5167                        my ($line_rem, $line_add) = format_rem_add_lines_pair(
5168                                $rem->[$i], $add->[$i], $num_parents);
5169                        push @new_rem, $line_rem;
5170                        push @new_add, $line_add;
5171                }
5172        } else {
5173                @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5174                @new_add = map { format_diff_line($_, 'add') } @$add;
5175        }
5176
5177        @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5178
5179        return (\@new_ctx, \@new_rem, \@new_add);
5180}
5181
5182# Print context lines and then rem/add lines.
5183sub print_diff_lines {
5184        my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5185        my $is_combined = $num_parents > 1;
5186
5187        ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5188                $num_parents);
5189
5190        if ($diff_style eq 'sidebyside' && !$is_combined) {
5191                print_sidebyside_diff_lines($ctx, $rem, $add);
5192        } else {
5193                # default 'inline' style and unknown styles
5194                print_inline_diff_lines($ctx, $rem, $add);
5195        }
5196}
5197
5198sub print_diff_chunk {
5199        my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5200        my (@ctx, @rem, @add);
5201
5202        # The class of the previous line.
5203        my $prev_class = '';
5204
5205        return unless @chunk;
5206
5207        # incomplete last line might be among removed or added lines,
5208        # or both, or among context lines: find which
5209        for (my $i = 1; $i < @chunk; $i++) {
5210                if ($chunk[$i][0] eq 'incomplete') {
5211                        $chunk[$i][0] = $chunk[$i-1][0];
5212                }
5213        }
5214
5215        # guardian
5216        push @chunk, ["", ""];
5217
5218        foreach my $line_info (@chunk) {
5219                my ($class, $line) = @$line_info;
5220
5221                # print chunk headers
5222                if ($class && $class eq 'chunk_header') {
5223                        print format_diff_line($line, $class, $from, $to);
5224                        next;
5225                }
5226
5227                ## print from accumulator when have some add/rem lines or end
5228                # of chunk (flush context lines), or when have add and rem
5229                # lines and new block is reached (otherwise add/rem lines could
5230                # be reordered)
5231                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5232                    (@rem && @add && $class ne $prev_class)) {
5233                        print_diff_lines(\@ctx, \@rem, \@add,
5234                                         $diff_style, $num_parents);
5235                        @ctx = @rem = @add = ();
5236                }
5237
5238                ## adding lines to accumulator
5239                # guardian value
5240                last unless $line;
5241                # rem, add or change
5242                if ($class eq 'rem') {
5243                        push @rem, $line;
5244                } elsif ($class eq 'add') {
5245                        push @add, $line;
5246                }
5247                # context line
5248                if ($class eq 'ctx') {
5249                        push @ctx, $line;
5250                }
5251
5252                $prev_class = $class;
5253        }
5254}
5255
5256sub git_patchset_body {
5257        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5258        my ($hash_parent) = $hash_parents[0];
5259
5260        my $is_combined = (@hash_parents > 1);
5261        my $patch_idx = 0;
5262        my $patch_number = 0;
5263        my $patch_line;
5264        my $diffinfo;
5265        my $to_name;
5266        my (%from, %to);
5267        my @chunk; # for side-by-side diff
5268
5269        print "<div class=\"patchset\">\n";
5270
5271        # skip to first patch
5272        while ($patch_line = <$fd>) {
5273                chomp $patch_line;
5274
5275                last if ($patch_line =~ m/^diff /);
5276        }
5277
5278 PATCH:
5279        while ($patch_line) {
5280
5281                # parse "git diff" header line
5282                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5283                        # $1 is from_name, which we do not use
5284                        $to_name = unquote($2);
5285                        $to_name =~ s!^b/!!;
5286                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5287                        # $1 is 'cc' or 'combined', which we do not use
5288                        $to_name = unquote($2);
5289                } else {
5290                        $to_name = undef;
5291                }
5292
5293                # check if current patch belong to current raw line
5294                # and parse raw git-diff line if needed
5295                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5296                        # this is continuation of a split patch
5297                        print "<div class=\"patch cont\">\n";
5298                } else {
5299                        # advance raw git-diff output if needed
5300                        $patch_idx++ if defined $diffinfo;
5301
5302                        # read and prepare patch information
5303                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5304
5305                        # compact combined diff output can have some patches skipped
5306                        # find which patch (using pathname of result) we are at now;
5307                        if ($is_combined) {
5308                                while ($to_name ne $diffinfo->{'to_file'}) {
5309                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5310                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5311                                              "</div>\n";  # class="patch"
5312
5313                                        $patch_idx++;
5314                                        $patch_number++;
5315
5316                                        last if $patch_idx > $#$difftree;
5317                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5318                                }
5319                        }
5320
5321                        # modifies %from, %to hashes
5322                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5323
5324                        # this is first patch for raw difftree line with $patch_idx index
5325                        # we index @$difftree array from 0, but number patches from 1
5326                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5327                }
5328
5329                # git diff header
5330                #assert($patch_line =~ m/^diff /) if DEBUG;
5331                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5332                $patch_number++;
5333                # print "git diff" header
5334                print format_git_diff_header_line($patch_line, $diffinfo,
5335                                                  \%from, \%to);
5336
5337                # print extended diff header
5338                print "<div class=\"diff extended_header\">\n";
5339        EXTENDED_HEADER:
5340                while ($patch_line = <$fd>) {
5341                        chomp $patch_line;
5342
5343                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5344
5345                        print format_extended_diff_header_line($patch_line, $diffinfo,
5346                                                               \%from, \%to);
5347                }
5348                print "</div>\n"; # class="diff extended_header"
5349
5350                # from-file/to-file diff header
5351                if (! $patch_line) {
5352                        print "</div>\n"; # class="patch"
5353                        last PATCH;
5354                }
5355                next PATCH if ($patch_line =~ m/^diff /);
5356                #assert($patch_line =~ m/^---/) if DEBUG;
5357
5358                my $last_patch_line = $patch_line;
5359                $patch_line = <$fd>;
5360                chomp $patch_line;
5361                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5362
5363                print format_diff_from_to_header($last_patch_line, $patch_line,
5364                                                 $diffinfo, \%from, \%to,
5365                                                 @hash_parents);
5366
5367                # the patch itself
5368        LINE:
5369                while ($patch_line = <$fd>) {
5370                        chomp $patch_line;
5371
5372                        next PATCH if ($patch_line =~ m/^diff /);
5373
5374                        my $class = diff_line_class($patch_line, \%from, \%to);
5375
5376                        if ($class eq 'chunk_header') {
5377                                print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5378                                @chunk = ();
5379                        }
5380
5381                        push @chunk, [ $class, $patch_line ];
5382                }
5383
5384        } continue {
5385                if (@chunk) {
5386                        print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5387                        @chunk = ();
5388                }
5389                print "</div>\n"; # class="patch"
5390        }
5391
5392        # for compact combined (--cc) format, with chunk and patch simplification
5393        # the patchset might be empty, but there might be unprocessed raw lines
5394        for (++$patch_idx if $patch_number > 0;
5395             $patch_idx < @$difftree;
5396             ++$patch_idx) {
5397                # read and prepare patch information
5398                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5399
5400                # generate anchor for "patch" links in difftree / whatchanged part
5401                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5402                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5403                      "</div>\n";  # class="patch"
5404
5405                $patch_number++;
5406        }
5407
5408        if ($patch_number == 0) {
5409                if (@hash_parents > 1) {
5410                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5411                } else {
5412                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5413                }
5414        }
5415
5416        print "</div>\n"; # class="patchset"
5417}
5418
5419# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5420
5421sub git_project_search_form {
5422        my ($searchtext, $search_use_regexp) = @_;
5423
5424        my $limit = '';
5425        if ($project_filter) {
5426                $limit = " in '$project_filter/'";
5427        }
5428
5429        print "<div class=\"projsearch\">\n";
5430        print $cgi->startform(-method => 'get', -action => $my_uri) .
5431              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5432        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5433                if (defined $project_filter);
5434        print $cgi->textfield(-name => 's', -value => $searchtext,
5435                              -title => "Search project by name and description$limit",
5436                              -size => 60) . "\n" .
5437              "<span title=\"Extended regular expression\">" .
5438              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5439                             -checked => $search_use_regexp) .
5440              "</span>\n" .
5441              $cgi->submit(-name => 'btnS', -value => 'Search') .
5442              $cgi->end_form() . "\n" .
5443              $cgi->a({-href => href(project => undef, searchtext => undef,
5444                                     project_filter => $project_filter)},
5445                      esc_html("List all projects$limit")) . "<br />\n";
5446        print "</div>\n";
5447}
5448
5449# entry for given @keys needs filling if at least one of keys in list
5450# is not present in %$project_info
5451sub project_info_needs_filling {
5452        my ($project_info, @keys) = @_;
5453
5454        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5455        foreach my $key (@keys) {
5456                if (!exists $project_info->{$key}) {
5457                        return 1;
5458                }
5459        }
5460        return;
5461}
5462
5463# fills project list info (age, description, owner, category, forks, etc.)
5464# for each project in the list, removing invalid projects from
5465# returned list, or fill only specified info.
5466#
5467# Invalid projects are removed from the returned list if and only if you
5468# ask 'age' or 'age_string' to be filled, because they are the only fields
5469# that run unconditionally git command that requires repository, and
5470# therefore do always check if project repository is invalid.
5471#
5472# USAGE:
5473# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5474#   ensures that 'descr_long' and 'ctags' fields are filled
5475# * @project_list = fill_project_list_info(\@project_list)
5476#   ensures that all fields are filled (and invalid projects removed)
5477#
5478# NOTE: modifies $projlist, but does not remove entries from it
5479sub fill_project_list_info {
5480        my ($projlist, @wanted_keys) = @_;
5481        my @projects;
5482        my $filter_set = sub { return @_; };
5483        if (@wanted_keys) {
5484                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5485                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5486        }
5487
5488        my $show_ctags = gitweb_check_feature('ctags');
5489 PROJECT:
5490        foreach my $pr (@$projlist) {
5491                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5492                        my (@activity) = git_get_last_activity($pr->{'path'});
5493                        unless (@activity) {
5494                                next PROJECT;
5495                        }
5496                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5497                }
5498                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5499                        my $descr = git_get_project_description($pr->{'path'}) || "";
5500                        $descr = to_utf8($descr);
5501                        $pr->{'descr_long'} = $descr;
5502                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5503                }
5504                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5505                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5506                }
5507                if ($show_ctags &&
5508                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5509                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5510                }
5511                if ($projects_list_group_categories &&
5512                    project_info_needs_filling($pr, $filter_set->('category'))) {
5513                        my $cat = git_get_project_category($pr->{'path'}) ||
5514                                                           $project_list_default_category;
5515                        $pr->{'category'} = to_utf8($cat);
5516                }
5517
5518                push @projects, $pr;
5519        }
5520
5521        return @projects;
5522}
5523
5524sub sort_projects_list {
5525        my ($projlist, $order) = @_;
5526        my @projects;
5527
5528        my %order_info = (
5529                project => { key => 'path', type => 'str' },
5530                descr => { key => 'descr_long', type => 'str' },
5531                owner => { key => 'owner', type => 'str' },
5532                age => { key => 'age', type => 'num' }
5533        );
5534        my $oi = $order_info{$order};
5535        return @$projlist unless defined $oi;
5536        if ($oi->{'type'} eq 'str') {
5537                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5538        } else {
5539                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5540        }
5541
5542        return @projects;
5543}
5544
5545# returns a hash of categories, containing the list of project
5546# belonging to each category
5547sub build_projlist_by_category {
5548        my ($projlist, $from, $to) = @_;
5549        my %categories;
5550
5551        $from = 0 unless defined $from;
5552        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5553
5554        for (my $i = $from; $i <= $to; $i++) {
5555                my $pr = $projlist->[$i];
5556                push @{$categories{ $pr->{'category'} }}, $pr;
5557        }
5558
5559        return wantarray ? %categories : \%categories;
5560}
5561
5562# print 'sort by' <th> element, generating 'sort by $name' replay link
5563# if that order is not selected
5564sub print_sort_th {
5565        print format_sort_th(@_);
5566}
5567
5568sub format_sort_th {
5569        my ($name, $order, $header) = @_;
5570        my $sort_th = "";
5571        $header ||= ucfirst($name);
5572
5573        if ($order eq $name) {
5574                $sort_th .= "<th>$header</th>\n";
5575        } else {
5576                $sort_th .= "<th>" .
5577                            $cgi->a({-href => href(-replay=>1, order=>$name),
5578                                     -class => "header"}, $header) .
5579                            "</th>\n";
5580        }
5581
5582        return $sort_th;
5583}
5584
5585sub git_project_list_rows {
5586        my ($projlist, $from, $to, $check_forks) = @_;
5587
5588        $from = 0 unless defined $from;
5589        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5590
5591        my $alternate = 1;
5592        for (my $i = $from; $i <= $to; $i++) {
5593                my $pr = $projlist->[$i];
5594
5595                if ($alternate) {
5596                        print "<tr class=\"dark\">\n";
5597                } else {
5598                        print "<tr class=\"light\">\n";
5599                }
5600                $alternate ^= 1;
5601
5602                if ($check_forks) {
5603                        print "<td>";
5604                        if ($pr->{'forks'}) {
5605                                my $nforks = scalar @{$pr->{'forks'}};
5606                                if ($nforks > 0) {
5607                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5608                                                       -title => "$nforks forks"}, "+");
5609                                } else {
5610                                        print $cgi->span({-title => "$nforks forks"}, "+");
5611                                }
5612                        }
5613                        print "</td>\n";
5614                }
5615                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5616                                        -class => "list"},
5617                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5618                      "</td>\n" .
5619                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5620                                        -class => "list",
5621                                        -title => $pr->{'descr_long'}},
5622                                        $search_regexp
5623                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5624                                                                    $pr->{'descr'}, $search_regexp)
5625                                        : esc_html($pr->{'descr'})) .
5626                      "</td>\n";
5627                unless ($omit_owner) {
5628                        print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5629                }
5630                unless ($omit_age_column) {
5631                        print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5632                            (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5633                }
5634                print"<td class=\"link\">" .
5635                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5636                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5637                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5638                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5639                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5640                      "</td>\n" .
5641                      "</tr>\n";
5642        }
5643}
5644
5645sub git_project_list_body {
5646        # actually uses global variable $project
5647        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5648        my @projects = @$projlist;
5649
5650        my $check_forks = gitweb_check_feature('forks');
5651        my $show_ctags  = gitweb_check_feature('ctags');
5652        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5653        $check_forks = undef
5654                if ($tagfilter || $search_regexp);
5655
5656        # filtering out forks before filling info allows to do less work
5657        @projects = filter_forks_from_projects_list(\@projects)
5658                if ($check_forks);
5659        # search_projects_list pre-fills required info
5660        @projects = search_projects_list(\@projects,
5661                                         'search_regexp' => $search_regexp,
5662                                         'tagfilter'  => $tagfilter)
5663                if ($tagfilter || $search_regexp);
5664        # fill the rest
5665        my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5666        push @all_fields, ('age', 'age_string') unless($omit_age_column);
5667        push @all_fields, 'owner' unless($omit_owner);
5668        @projects = fill_project_list_info(\@projects, @all_fields);
5669
5670        $order ||= $default_projects_order;
5671        $from = 0 unless defined $from;
5672        $to = $#projects if (!defined $to || $#projects < $to);
5673
5674        # short circuit
5675        if ($from > $to) {
5676                print "<center>\n".
5677                      "<b>No such projects found</b><br />\n".
5678                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5679                      "</center>\n<br />\n";
5680                return;
5681        }
5682
5683        @projects = sort_projects_list(\@projects, $order);
5684
5685        if ($show_ctags) {
5686                my $ctags = git_gather_all_ctags(\@projects);
5687                my $cloud = git_populate_project_tagcloud($ctags);
5688                print git_show_project_tagcloud($cloud, 64);
5689        }
5690
5691        print "<table class=\"project_list\">\n";
5692        unless ($no_header) {
5693                print "<tr>\n";
5694                if ($check_forks) {
5695                        print "<th></th>\n";
5696                }
5697                print_sort_th('project', $order, 'Project');
5698                print_sort_th('descr', $order, 'Description');
5699                print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5700                print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5701                print "<th></th>\n" . # for links
5702                      "</tr>\n";
5703        }
5704
5705        if ($projects_list_group_categories) {
5706                # only display categories with projects in the $from-$to window
5707                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5708                my %categories = build_projlist_by_category(\@projects, $from, $to);
5709                foreach my $cat (sort keys %categories) {
5710                        unless ($cat eq "") {
5711                                print "<tr>\n";
5712                                if ($check_forks) {
5713                                        print "<td></td>\n";
5714                                }
5715                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5716                                print "</tr>\n";
5717                        }
5718
5719                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5720                }
5721        } else {
5722                git_project_list_rows(\@projects, $from, $to, $check_forks);
5723        }
5724
5725        if (defined $extra) {
5726                print "<tr>\n";
5727                if ($check_forks) {
5728                        print "<td></td>\n";
5729                }
5730                print "<td colspan=\"5\">$extra</td>\n" .
5731                      "</tr>\n";
5732        }
5733        print "</table>\n";
5734}
5735
5736sub git_log_body {
5737        # uses global variable $project
5738        my ($commitlist, $from, $to, $refs, $extra) = @_;
5739
5740        $from = 0 unless defined $from;
5741        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5742
5743        for (my $i = 0; $i <= $to; $i++) {
5744                my %co = %{$commitlist->[$i]};
5745                next if !%co;
5746                my $commit = $co{'id'};
5747                my $ref = format_ref_marker($refs, $commit);
5748                git_print_header_div('commit',
5749                               "<span class=\"age\">$co{'age_string'}</span>" .
5750                               esc_html($co{'title'}) . $ref,
5751                               $commit);
5752                print "<div class=\"title_text\">\n" .
5753                      "<div class=\"log_link\">\n" .
5754                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5755                      " | " .
5756                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5757                      " | " .
5758                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5759                      "<br/>\n" .
5760                      "</div>\n";
5761                      git_print_authorship(\%co, -tag => 'span');
5762                      print "<br/>\n</div>\n";
5763
5764                print "<div class=\"log_body\">\n";
5765                git_print_log($co{'comment'}, -final_empty_line=> 1);
5766                print "</div>\n";
5767        }
5768        if ($extra) {
5769                print "<div class=\"page_nav\">\n";
5770                print "$extra\n";
5771                print "</div>\n";
5772        }
5773}
5774
5775sub git_shortlog_body {
5776        # uses global variable $project
5777        my ($commitlist, $from, $to, $refs, $extra) = @_;
5778
5779        $from = 0 unless defined $from;
5780        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5781
5782        print "<table class=\"shortlog\">\n";
5783        my $alternate = 1;
5784        for (my $i = $from; $i <= $to; $i++) {
5785                my %co = %{$commitlist->[$i]};
5786                my $commit = $co{'id'};
5787                my $ref = format_ref_marker($refs, $commit);
5788                if ($alternate) {
5789                        print "<tr class=\"dark\">\n";
5790                } else {
5791                        print "<tr class=\"light\">\n";
5792                }
5793                $alternate ^= 1;
5794                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5795                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5796                      format_author_html('td', \%co, 10) . "<td>";
5797                print format_subject_html($co{'title'}, $co{'title_short'},
5798                                          href(action=>"commit", hash=>$commit), $ref);
5799                print "</td>\n" .
5800                      "<td class=\"link\">" .
5801                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5802                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5803                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5804                my $snapshot_links = format_snapshot_links($commit);
5805                if (defined $snapshot_links) {
5806                        print " | " . $snapshot_links;
5807                }
5808                print "</td>\n" .
5809                      "</tr>\n";
5810        }
5811        if (defined $extra) {
5812                print "<tr>\n" .
5813                      "<td colspan=\"4\">$extra</td>\n" .
5814                      "</tr>\n";
5815        }
5816        print "</table>\n";
5817}
5818
5819sub git_history_body {
5820        # Warning: assumes constant type (blob or tree) during history
5821        my ($commitlist, $from, $to, $refs, $extra,
5822            $file_name, $file_hash, $ftype) = @_;
5823
5824        $from = 0 unless defined $from;
5825        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5826
5827        print "<table class=\"history\">\n";
5828        my $alternate = 1;
5829        for (my $i = $from; $i <= $to; $i++) {
5830                my %co = %{$commitlist->[$i]};
5831                if (!%co) {
5832                        next;
5833                }
5834                my $commit = $co{'id'};
5835
5836                my $ref = format_ref_marker($refs, $commit);
5837
5838                if ($alternate) {
5839                        print "<tr class=\"dark\">\n";
5840                } else {
5841                        print "<tr class=\"light\">\n";
5842                }
5843                $alternate ^= 1;
5844                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5845        # shortlog:   format_author_html('td', \%co, 10)
5846                      format_author_html('td', \%co, 15, 3) . "<td>";
5847                # originally git_history used chop_str($co{'title'}, 50)
5848                print format_subject_html($co{'title'}, $co{'title_short'},
5849                                          href(action=>"commit", hash=>$commit), $ref);
5850                print "</td>\n" .
5851                      "<td class=\"link\">" .
5852                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5853                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5854
5855                if ($ftype eq 'blob') {
5856                        my $blob_current = $file_hash;
5857                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5858                        if (defined $blob_current && defined $blob_parent &&
5859                                        $blob_current ne $blob_parent) {
5860                                print " | " .
5861                                        $cgi->a({-href => href(action=>"blobdiff",
5862                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5863                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5864                                                               file_name=>$file_name)},
5865                                                "diff to current");
5866                        }
5867                }
5868                print "</td>\n" .
5869                      "</tr>\n";
5870        }
5871        if (defined $extra) {
5872                print "<tr>\n" .
5873                      "<td colspan=\"4\">$extra</td>\n" .
5874                      "</tr>\n";
5875        }
5876        print "</table>\n";
5877}
5878
5879sub git_tags_body {
5880        # uses global variable $project
5881        my ($taglist, $from, $to, $extra) = @_;
5882        $from = 0 unless defined $from;
5883        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5884
5885        print "<table class=\"tags\">\n";
5886        my $alternate = 1;
5887        for (my $i = $from; $i <= $to; $i++) {
5888                my $entry = $taglist->[$i];
5889                my %tag = %$entry;
5890                my $comment = $tag{'subject'};
5891                my $comment_short;
5892                if (defined $comment) {
5893                        $comment_short = chop_str($comment, 30, 5);
5894                }
5895                if ($alternate) {
5896                        print "<tr class=\"dark\">\n";
5897                } else {
5898                        print "<tr class=\"light\">\n";
5899                }
5900                $alternate ^= 1;
5901                if (defined $tag{'age'}) {
5902                        print "<td><i>$tag{'age'}</i></td>\n";
5903                } else {
5904                        print "<td></td>\n";
5905                }
5906                print "<td>" .
5907                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5908                               -class => "list name"}, esc_html($tag{'name'})) .
5909                      "</td>\n" .
5910                      "<td>";
5911                if (defined $comment) {
5912                        print format_subject_html($comment, $comment_short,
5913                                                  href(action=>"tag", hash=>$tag{'id'}));
5914                }
5915                print "</td>\n" .
5916                      "<td class=\"selflink\">";
5917                if ($tag{'type'} eq "tag") {
5918                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5919                } else {
5920                        print "&nbsp;";
5921                }
5922                print "</td>\n" .
5923                      "<td class=\"link\">" . " | " .
5924                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5925                if ($tag{'reftype'} eq "commit") {
5926                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5927                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5928                } elsif ($tag{'reftype'} eq "blob") {
5929                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5930                }
5931                print "</td>\n" .
5932                      "</tr>";
5933        }
5934        if (defined $extra) {
5935                print "<tr>\n" .
5936                      "<td colspan=\"5\">$extra</td>\n" .
5937                      "</tr>\n";
5938        }
5939        print "</table>\n";
5940}
5941
5942sub git_heads_body {
5943        # uses global variable $project
5944        my ($headlist, $head_at, $from, $to, $extra) = @_;
5945        $from = 0 unless defined $from;
5946        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5947
5948        print "<table class=\"heads\">\n";
5949        my $alternate = 1;
5950        for (my $i = $from; $i <= $to; $i++) {
5951                my $entry = $headlist->[$i];
5952                my %ref = %$entry;
5953                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5954                if ($alternate) {
5955                        print "<tr class=\"dark\">\n";
5956                } else {
5957                        print "<tr class=\"light\">\n";
5958                }
5959                $alternate ^= 1;
5960                print "<td><i>$ref{'age'}</i></td>\n" .
5961                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5962                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5963                               -class => "list name"},esc_html($ref{'name'})) .
5964                      "</td>\n" .
5965                      "<td class=\"link\">" .
5966                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5967                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5968                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5969                      "</td>\n" .
5970                      "</tr>";
5971        }
5972        if (defined $extra) {
5973                print "<tr>\n" .
5974                      "<td colspan=\"3\">$extra</td>\n" .
5975                      "</tr>\n";
5976        }
5977        print "</table>\n";
5978}
5979
5980# Display a single remote block
5981sub git_remote_block {
5982        my ($remote, $rdata, $limit, $head) = @_;
5983
5984        my $heads = $rdata->{'heads'};
5985        my $fetch = $rdata->{'fetch'};
5986        my $push = $rdata->{'push'};
5987
5988        my $urls_table = "<table class=\"projects_list\">\n" ;
5989
5990        if (defined $fetch) {
5991                if ($fetch eq $push) {
5992                        $urls_table .= format_repo_url("URL", $fetch);
5993                } else {
5994                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5995                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5996                }
5997        } elsif (defined $push) {
5998                $urls_table .= format_repo_url("Push URL", $push);
5999        } else {
6000                $urls_table .= format_repo_url("", "No remote URL");
6001        }
6002
6003        $urls_table .= "</table>\n";
6004
6005        my $dots;
6006        if (defined $limit && $limit < @$heads) {
6007                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6008        }
6009
6010        print $urls_table;
6011        git_heads_body($heads, $head, 0, $limit, $dots);
6012}
6013
6014# Display a list of remote names with the respective fetch and push URLs
6015sub git_remotes_list {
6016        my ($remotedata, $limit) = @_;
6017        print "<table class=\"heads\">\n";
6018        my $alternate = 1;
6019        my @remotes = sort keys %$remotedata;
6020
6021        my $limited = $limit && $limit < @remotes;
6022
6023        $#remotes = $limit - 1 if $limited;
6024
6025        while (my $remote = shift @remotes) {
6026                my $rdata = $remotedata->{$remote};
6027                my $fetch = $rdata->{'fetch'};
6028                my $push = $rdata->{'push'};
6029                if ($alternate) {
6030                        print "<tr class=\"dark\">\n";
6031                } else {
6032                        print "<tr class=\"light\">\n";
6033                }
6034                $alternate ^= 1;
6035                print "<td>" .
6036                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6037                               -class=> "list name"},esc_html($remote)) .
6038                      "</td>";
6039                print "<td class=\"link\">" .
6040                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6041                      " | " .
6042                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6043                      "</td>";
6044
6045                print "</tr>\n";
6046        }
6047
6048        if ($limited) {
6049                print "<tr>\n" .
6050                      "<td colspan=\"3\">" .
6051                      $cgi->a({-href => href(action=>"remotes")}, "...") .
6052                      "</td>\n" . "</tr>\n";
6053        }
6054
6055        print "</table>";
6056}
6057
6058# Display remote heads grouped by remote, unless there are too many
6059# remotes, in which case we only display the remote names
6060sub git_remotes_body {
6061        my ($remotedata, $limit, $head) = @_;
6062        if ($limit and $limit < keys %$remotedata) {
6063                git_remotes_list($remotedata, $limit);
6064        } else {
6065                fill_remote_heads($remotedata);
6066                while (my ($remote, $rdata) = each %$remotedata) {
6067                        git_print_section({-class=>"remote", -id=>$remote},
6068                                ["remotes", $remote, $remote], sub {
6069                                        git_remote_block($remote, $rdata, $limit, $head);
6070                                });
6071                }
6072        }
6073}
6074
6075sub git_search_message {
6076        my %co = @_;
6077
6078        my $greptype;
6079        if ($searchtype eq 'commit') {
6080                $greptype = "--grep=";
6081        } elsif ($searchtype eq 'author') {
6082                $greptype = "--author=";
6083        } elsif ($searchtype eq 'committer') {
6084                $greptype = "--committer=";
6085        }
6086        $greptype .= $searchtext;
6087        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6088                                       $greptype, '--regexp-ignore-case',
6089                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6090
6091        my $paging_nav = '';
6092        if ($page > 0) {
6093                $paging_nav .=
6094                        $cgi->a({-href => href(-replay=>1, page=>undef)},
6095                                "first") .
6096                        " &sdot; " .
6097                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
6098                                 -accesskey => "p", -title => "Alt-p"}, "prev");
6099        } else {
6100                $paging_nav .= "first &sdot; prev";
6101        }
6102        my $next_link = '';
6103        if ($#commitlist >= 100) {
6104                $next_link =
6105                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6106                                 -accesskey => "n", -title => "Alt-n"}, "next");
6107                $paging_nav .= " &sdot; $next_link";
6108        } else {
6109                $paging_nav .= " &sdot; next";
6110        }
6111
6112        git_header_html();
6113
6114        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6115        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6116        if ($page == 0 && !@commitlist) {
6117                print "<p>No match.</p>\n";
6118        } else {
6119                git_search_grep_body(\@commitlist, 0, 99, $next_link);
6120        }
6121
6122        git_footer_html();
6123}
6124
6125sub git_search_changes {
6126        my %co = @_;
6127
6128        local $/ = "\n";
6129        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6130                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6131                ($search_use_regexp ? '--pickaxe-regex' : ())
6132                        or die_error(500, "Open git-log failed");
6133
6134        git_header_html();
6135
6136        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6137        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6138
6139        print "<table class=\"pickaxe search\">\n";
6140        my $alternate = 1;
6141        undef %co;
6142        my @files;
6143        while (my $line = <$fd>) {
6144                chomp $line;
6145                next unless $line;
6146
6147                my %set = parse_difftree_raw_line($line);
6148                if (defined $set{'commit'}) {
6149                        # finish previous commit
6150                        if (%co) {
6151                                print "</td>\n" .
6152                                      "<td class=\"link\">" .
6153                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6154                                              "commit") .
6155                                      " | " .
6156                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6157                                                             hash_base=>$co{'id'})},
6158                                              "tree") .
6159                                      "</td>\n" .
6160                                      "</tr>\n";
6161                        }
6162
6163                        if ($alternate) {
6164                                print "<tr class=\"dark\">\n";
6165                        } else {
6166                                print "<tr class=\"light\">\n";
6167                        }
6168                        $alternate ^= 1;
6169                        %co = parse_commit($set{'commit'});
6170                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6171                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6172                              "<td><i>$author</i></td>\n" .
6173                              "<td>" .
6174                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6175                                      -class => "list subject"},
6176                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6177                } elsif (defined $set{'to_id'}) {
6178                        next if ($set{'to_id'} =~ m/^0{40}$/);
6179
6180                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6181                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6182                                      -class => "list"},
6183                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6184                              "<br/>\n";
6185                }
6186        }
6187        close $fd;
6188
6189        # finish last commit (warning: repetition!)
6190        if (%co) {
6191                print "</td>\n" .
6192                      "<td class=\"link\">" .
6193                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6194                              "commit") .
6195                      " | " .
6196                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6197                                             hash_base=>$co{'id'})},
6198                              "tree") .
6199                      "</td>\n" .
6200                      "</tr>\n";
6201        }
6202
6203        print "</table>\n";
6204
6205        git_footer_html();
6206}
6207
6208sub git_search_files {
6209        my %co = @_;
6210
6211        local $/ = "\n";
6212        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6213                $search_use_regexp ? ('-E', '-i') : '-F',
6214                $searchtext, $co{'tree'}
6215                        or die_error(500, "Open git-grep failed");
6216
6217        git_header_html();
6218
6219        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6220        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6221
6222        print "<table class=\"grep_search\">\n";
6223        my $alternate = 1;
6224        my $matches = 0;
6225        my $lastfile = '';
6226        my $file_href;
6227        while (my $line = <$fd>) {
6228                chomp $line;
6229                my ($file, $lno, $ltext, $binary);
6230                last if ($matches++ > 1000);
6231                if ($line =~ /^Binary file (.+) matches$/) {
6232                        $file = $1;
6233                        $binary = 1;
6234                } else {
6235                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6236                        $file =~ s/^$co{'tree'}://;
6237                }
6238                if ($file ne $lastfile) {
6239                        $lastfile and print "</td></tr>\n";
6240                        if ($alternate++) {
6241                                print "<tr class=\"dark\">\n";
6242                        } else {
6243                                print "<tr class=\"light\">\n";
6244                        }
6245                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6246                                          file_name=>$file);
6247                        print "<td class=\"list\">".
6248                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6249                        print "</td><td>\n";
6250                        $lastfile = $file;
6251                }
6252                if ($binary) {
6253                        print "<div class=\"binary\">Binary file</div>\n";
6254                } else {
6255                        $ltext = untabify($ltext);
6256                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6257                                $ltext = esc_html($1, -nbsp=>1);
6258                                $ltext .= '<span class="match">';
6259                                $ltext .= esc_html($2, -nbsp=>1);
6260                                $ltext .= '</span>';
6261                                $ltext .= esc_html($3, -nbsp=>1);
6262                        } else {
6263                                $ltext = esc_html($ltext, -nbsp=>1);
6264                        }
6265                        print "<div class=\"pre\">" .
6266                                $cgi->a({-href => $file_href.'#l'.$lno,
6267                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6268                                ' ' .  $ltext . "</div>\n";
6269                }
6270        }
6271        if ($lastfile) {
6272                print "</td></tr>\n";
6273                if ($matches > 1000) {
6274                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6275                }
6276        } else {
6277                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6278        }
6279        close $fd;
6280
6281        print "</table>\n";
6282
6283        git_footer_html();
6284}
6285
6286sub git_search_grep_body {
6287        my ($commitlist, $from, $to, $extra) = @_;
6288        $from = 0 unless defined $from;
6289        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6290
6291        print "<table class=\"commit_search\">\n";
6292        my $alternate = 1;
6293        for (my $i = $from; $i <= $to; $i++) {
6294                my %co = %{$commitlist->[$i]};
6295                if (!%co) {
6296                        next;
6297                }
6298                my $commit = $co{'id'};
6299                if ($alternate) {
6300                        print "<tr class=\"dark\">\n";
6301                } else {
6302                        print "<tr class=\"light\">\n";
6303                }
6304                $alternate ^= 1;
6305                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6306                      format_author_html('td', \%co, 15, 5) .
6307                      "<td>" .
6308                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6309                               -class => "list subject"},
6310                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6311                my $comment = $co{'comment'};
6312                foreach my $line (@$comment) {
6313                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6314                                my ($lead, $match, $trail) = ($1, $2, $3);
6315                                $match = chop_str($match, 70, 5, 'center');
6316                                my $contextlen = int((80 - length($match))/2);
6317                                $contextlen = 30 if ($contextlen > 30);
6318                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6319                                $trail = chop_str($trail, $contextlen, 10, 'right');
6320
6321                                $lead  = esc_html($lead);
6322                                $match = esc_html($match);
6323                                $trail = esc_html($trail);
6324
6325                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6326                        }
6327                }
6328                print "</td>\n" .
6329                      "<td class=\"link\">" .
6330                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6331                      " | " .
6332                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6333                      " | " .
6334                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6335                print "</td>\n" .
6336                      "</tr>\n";
6337        }
6338        if (defined $extra) {
6339                print "<tr>\n" .
6340                      "<td colspan=\"3\">$extra</td>\n" .
6341                      "</tr>\n";
6342        }
6343        print "</table>\n";
6344}
6345
6346## ======================================================================
6347## ======================================================================
6348## actions
6349
6350sub git_project_list {
6351        my $order = $input_params{'order'};
6352        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6353                die_error(400, "Unknown order parameter");
6354        }
6355
6356        my @list = git_get_projects_list($project_filter, $strict_export);
6357        if (!@list) {
6358                die_error(404, "No projects found");
6359        }
6360
6361        git_header_html();
6362        if (defined $home_text && -f $home_text) {
6363                print "<div class=\"index_include\">\n";
6364                insert_file($home_text);
6365                print "</div>\n";
6366        }
6367
6368        git_project_search_form($searchtext, $search_use_regexp);
6369        git_project_list_body(\@list, $order);
6370        git_footer_html();
6371}
6372
6373sub git_forks {
6374        my $order = $input_params{'order'};
6375        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6376                die_error(400, "Unknown order parameter");
6377        }
6378
6379        my $filter = $project;
6380        $filter =~ s/\.git$//;
6381        my @list = git_get_projects_list($filter);
6382        if (!@list) {
6383                die_error(404, "No forks found");
6384        }
6385
6386        git_header_html();
6387        git_print_page_nav('','');
6388        git_print_header_div('summary', "$project forks");
6389        git_project_list_body(\@list, $order);
6390        git_footer_html();
6391}
6392
6393sub git_project_index {
6394        my @projects = git_get_projects_list($project_filter, $strict_export);
6395        if (!@projects) {
6396                die_error(404, "No projects found");
6397        }
6398
6399        print $cgi->header(
6400                -type => 'text/plain',
6401                -charset => 'utf-8',
6402                -content_disposition => 'inline; filename="index.aux"');
6403
6404        foreach my $pr (@projects) {
6405                if (!exists $pr->{'owner'}) {
6406                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6407                }
6408
6409                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6410                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6411                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6412                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6413                $path  =~ s/ /\+/g;
6414                $owner =~ s/ /\+/g;
6415
6416                print "$path $owner\n";
6417        }
6418}
6419
6420sub git_summary {
6421        my $descr = git_get_project_description($project) || "none";
6422        my %co = parse_commit("HEAD");
6423        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6424        my $head = $co{'id'};
6425        my $remote_heads = gitweb_check_feature('remote_heads');
6426
6427        my $owner = git_get_project_owner($project);
6428
6429        my $refs = git_get_references();
6430        # These get_*_list functions return one more to allow us to see if
6431        # there are more ...
6432        my @taglist  = git_get_tags_list(16);
6433        my @headlist = git_get_heads_list(16);
6434        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6435        my @forklist;
6436        my $check_forks = gitweb_check_feature('forks');
6437
6438        if ($check_forks) {
6439                # find forks of a project
6440                my $filter = $project;
6441                $filter =~ s/\.git$//;
6442                @forklist = git_get_projects_list($filter);
6443                # filter out forks of forks
6444                @forklist = filter_forks_from_projects_list(\@forklist)
6445                        if (@forklist);
6446        }
6447
6448        git_header_html();
6449        git_print_page_nav('summary','', $head);
6450
6451        print "<div class=\"title\">&nbsp;</div>\n";
6452        print "<table class=\"projects_list\">\n" .
6453              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6454        unless ($omit_owner) {
6455                print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6456        }
6457        if (defined $cd{'rfc2822'}) {
6458                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6459                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6460        }
6461
6462        # use per project git URL list in $projectroot/$project/cloneurl
6463        # or make project git URL from git base URL and project name
6464        my $url_tag = "URL";
6465        my @url_list = git_get_project_url_list($project);
6466        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6467        foreach my $git_url (@url_list) {
6468                next unless $git_url;
6469                print format_repo_url($url_tag, $git_url);
6470                $url_tag = "";
6471        }
6472
6473        # Tag cloud
6474        my $show_ctags = gitweb_check_feature('ctags');
6475        if ($show_ctags) {
6476                my $ctags = git_get_project_ctags($project);
6477                if (%$ctags) {
6478                        # without ability to add tags, don't show if there are none
6479                        my $cloud = git_populate_project_tagcloud($ctags);
6480                        print "<tr id=\"metadata_ctags\">" .
6481                              "<td>content tags</td>" .
6482                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6483                              "</tr>\n";
6484                }
6485        }
6486
6487        print "</table>\n";
6488
6489        # If XSS prevention is on, we don't include README.html.
6490        # TODO: Allow a readme in some safe format.
6491        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6492                print "<div class=\"title\">readme</div>\n" .
6493                      "<div class=\"readme\">\n";
6494                insert_file("$projectroot/$project/README.html");
6495                print "\n</div>\n"; # class="readme"
6496        }
6497
6498        # we need to request one more than 16 (0..15) to check if
6499        # those 16 are all
6500        my @commitlist = $head ? parse_commits($head, 17) : ();
6501        if (@commitlist) {
6502                git_print_header_div('shortlog');
6503                git_shortlog_body(\@commitlist, 0, 15, $refs,
6504                                  $#commitlist <=  15 ? undef :
6505                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6506        }
6507
6508        if (@taglist) {
6509                git_print_header_div('tags');
6510                git_tags_body(\@taglist, 0, 15,
6511                              $#taglist <=  15 ? undef :
6512                              $cgi->a({-href => href(action=>"tags")}, "..."));
6513        }
6514
6515        if (@headlist) {
6516                git_print_header_div('heads');
6517                git_heads_body(\@headlist, $head, 0, 15,
6518                               $#headlist <= 15 ? undef :
6519                               $cgi->a({-href => href(action=>"heads")}, "..."));
6520        }
6521
6522        if (%remotedata) {
6523                git_print_header_div('remotes');
6524                git_remotes_body(\%remotedata, 15, $head);
6525        }
6526
6527        if (@forklist) {
6528                git_print_header_div('forks');
6529                git_project_list_body(\@forklist, 'age', 0, 15,
6530                                      $#forklist <= 15 ? undef :
6531                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6532                                      'no_header');
6533        }
6534
6535        git_footer_html();
6536}
6537
6538sub git_tag {
6539        my %tag = parse_tag($hash);
6540
6541        if (! %tag) {
6542                die_error(404, "Unknown tag object");
6543        }
6544
6545        my $head = git_get_head_hash($project);
6546        git_header_html();
6547        git_print_page_nav('','', $head,undef,$head);
6548        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6549        print "<div class=\"title_text\">\n" .
6550              "<table class=\"object_header\">\n" .
6551              "<tr>\n" .
6552              "<td>object</td>\n" .
6553              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6554                               $tag{'object'}) . "</td>\n" .
6555              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6556                                              $tag{'type'}) . "</td>\n" .
6557              "</tr>\n";
6558        if (defined($tag{'author'})) {
6559                git_print_authorship_rows(\%tag, 'author');
6560        }
6561        print "</table>\n\n" .
6562              "</div>\n";
6563        print "<div class=\"page_body\">";
6564        my $comment = $tag{'comment'};
6565        foreach my $line (@$comment) {
6566                chomp $line;
6567                print esc_html($line, -nbsp=>1) . "<br/>\n";
6568        }
6569        print "</div>\n";
6570        git_footer_html();
6571}
6572
6573sub git_blame_common {
6574        my $format = shift || 'porcelain';
6575        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6576                $format = 'incremental';
6577                $action = 'blame_incremental'; # for page title etc
6578        }
6579
6580        # permissions
6581        gitweb_check_feature('blame')
6582                or die_error(403, "Blame view not allowed");
6583
6584        # error checking
6585        die_error(400, "No file name given") unless $file_name;
6586        $hash_base ||= git_get_head_hash($project);
6587        die_error(404, "Couldn't find base commit") unless $hash_base;
6588        my %co = parse_commit($hash_base)
6589                or die_error(404, "Commit not found");
6590        my $ftype = "blob";
6591        if (!defined $hash) {
6592                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6593                        or die_error(404, "Error looking up file");
6594        } else {
6595                $ftype = git_get_type($hash);
6596                if ($ftype !~ "blob") {
6597                        die_error(400, "Object is not a blob");
6598                }
6599        }
6600
6601        my $fd;
6602        if ($format eq 'incremental') {
6603                # get file contents (as base)
6604                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6605                        or die_error(500, "Open git-cat-file failed");
6606        } elsif ($format eq 'data') {
6607                # run git-blame --incremental
6608                open $fd, "-|", git_cmd(), "blame", "--incremental",
6609                        $hash_base, "--", $file_name
6610                        or die_error(500, "Open git-blame --incremental failed");
6611        } else {
6612                # run git-blame --porcelain
6613                open $fd, "-|", git_cmd(), "blame", '-p',
6614                        $hash_base, '--', $file_name
6615                        or die_error(500, "Open git-blame --porcelain failed");
6616        }
6617
6618        # incremental blame data returns early
6619        if ($format eq 'data') {
6620                print $cgi->header(
6621                        -type=>"text/plain", -charset => "utf-8",
6622                        -status=> "200 OK");
6623                local $| = 1; # output autoflush
6624                while (my $line = <$fd>) {
6625                        print to_utf8($line);
6626                }
6627                close $fd
6628                        or print "ERROR $!\n";
6629
6630                print 'END';
6631                if (defined $t0 && gitweb_check_feature('timed')) {
6632                        print ' '.
6633                              tv_interval($t0, [ gettimeofday() ]).
6634                              ' '.$number_of_git_cmds;
6635                }
6636                print "\n";
6637
6638                return;
6639        }
6640
6641        # page header
6642        git_header_html();
6643        my $formats_nav =
6644                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6645                        "blob") .
6646                " | ";
6647        if ($format eq 'incremental') {
6648                $formats_nav .=
6649                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6650                                "blame") . " (non-incremental)";
6651        } else {
6652                $formats_nav .=
6653                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6654                                "blame") . " (incremental)";
6655        }
6656        $formats_nav .=
6657                " | " .
6658                $cgi->a({-href => href(action=>"history", -replay=>1)},
6659                        "history") .
6660                " | " .
6661                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6662                        "HEAD");
6663        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6664        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6665        git_print_page_path($file_name, $ftype, $hash_base);
6666
6667        # page body
6668        if ($format eq 'incremental') {
6669                print "<noscript>\n<div class=\"error\"><center><b>\n".
6670                      "This page requires JavaScript to run.\n Use ".
6671                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6672                              'this page').
6673                      " instead.\n".
6674                      "</b></center></div>\n</noscript>\n";
6675
6676                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6677        }
6678
6679        print qq!<div class="page_body">\n!;
6680        print qq!<div id="progress_info">... / ...</div>\n!
6681                if ($format eq 'incremental');
6682        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6683              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6684              qq!<thead>\n!.
6685              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6686              qq!</thead>\n!.
6687              qq!<tbody>\n!;
6688
6689        my @rev_color = qw(light dark);
6690        my $num_colors = scalar(@rev_color);
6691        my $current_color = 0;
6692
6693        if ($format eq 'incremental') {
6694                my $color_class = $rev_color[$current_color];
6695
6696                #contents of a file
6697                my $linenr = 0;
6698        LINE:
6699                while (my $line = <$fd>) {
6700                        chomp $line;
6701                        $linenr++;
6702
6703                        print qq!<tr id="l$linenr" class="$color_class">!.
6704                              qq!<td class="sha1"><a href=""> </a></td>!.
6705                              qq!<td class="linenr">!.
6706                              qq!<a class="linenr" href="">$linenr</a></td>!;
6707                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6708                        print qq!</tr>\n!;
6709                }
6710
6711        } else { # porcelain, i.e. ordinary blame
6712                my %metainfo = (); # saves information about commits
6713
6714                # blame data
6715        LINE:
6716                while (my $line = <$fd>) {
6717                        chomp $line;
6718                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6719                        # no <lines in group> for subsequent lines in group of lines
6720                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6721                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6722                        if (!exists $metainfo{$full_rev}) {
6723                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6724                        }
6725                        my $meta = $metainfo{$full_rev};
6726                        my $data;
6727                        while ($data = <$fd>) {
6728                                chomp $data;
6729                                last if ($data =~ s/^\t//); # contents of line
6730                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6731                                        $meta->{$1} = $2 unless exists $meta->{$1};
6732                                }
6733                                if ($data =~ /^previous /) {
6734                                        $meta->{'nprevious'}++;
6735                                }
6736                        }
6737                        my $short_rev = substr($full_rev, 0, 8);
6738                        my $author = $meta->{'author'};
6739                        my %date =
6740                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6741                        my $date = $date{'iso-tz'};
6742                        if ($group_size) {
6743                                $current_color = ($current_color + 1) % $num_colors;
6744                        }
6745                        my $tr_class = $rev_color[$current_color];
6746                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6747                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6748                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6749                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6750                        if ($group_size) {
6751                                print "<td class=\"sha1\"";
6752                                print " title=\"". esc_html($author) . ", $date\"";
6753                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6754                                print ">";
6755                                print $cgi->a({-href => href(action=>"commit",
6756                                                             hash=>$full_rev,
6757                                                             file_name=>$file_name)},
6758                                              esc_html($short_rev));
6759                                if ($group_size >= 2) {
6760                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6761                                        if (@author_initials) {
6762                                                print "<br />" .
6763                                                      esc_html(join('', @author_initials));
6764                                                #           or join('.', ...)
6765                                        }
6766                                }
6767                                print "</td>\n";
6768                        }
6769                        # 'previous' <sha1 of parent commit> <filename at commit>
6770                        if (exists $meta->{'previous'} &&
6771                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6772                                $meta->{'parent'} = $1;
6773                                $meta->{'file_parent'} = unquote($2);
6774                        }
6775                        my $linenr_commit =
6776                                exists($meta->{'parent'}) ?
6777                                $meta->{'parent'} : $full_rev;
6778                        my $linenr_filename =
6779                                exists($meta->{'file_parent'}) ?
6780                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6781                        my $blamed = href(action => 'blame',
6782                                          file_name => $linenr_filename,
6783                                          hash_base => $linenr_commit);
6784                        print "<td class=\"linenr\">";
6785                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6786                                        -class => "linenr" },
6787                                      esc_html($lineno));
6788                        print "</td>";
6789                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6790                        print "</tr>\n";
6791                } # end while
6792
6793        }
6794
6795        # footer
6796        print "</tbody>\n".
6797              "</table>\n"; # class="blame"
6798        print "</div>\n";   # class="blame_body"
6799        close $fd
6800                or print "Reading blob failed\n";
6801
6802        git_footer_html();
6803}
6804
6805sub git_blame {
6806        git_blame_common();
6807}
6808
6809sub git_blame_incremental {
6810        git_blame_common('incremental');
6811}
6812
6813sub git_blame_data {
6814        git_blame_common('data');
6815}
6816
6817sub git_tags {
6818        my $head = git_get_head_hash($project);
6819        git_header_html();
6820        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6821        git_print_header_div('summary', $project);
6822
6823        my @tagslist = git_get_tags_list();
6824        if (@tagslist) {
6825                git_tags_body(\@tagslist);
6826        }
6827        git_footer_html();
6828}
6829
6830sub git_heads {
6831        my $head = git_get_head_hash($project);
6832        git_header_html();
6833        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6834        git_print_header_div('summary', $project);
6835
6836        my @headslist = git_get_heads_list();
6837        if (@headslist) {
6838                git_heads_body(\@headslist, $head);
6839        }
6840        git_footer_html();
6841}
6842
6843# used both for single remote view and for list of all the remotes
6844sub git_remotes {
6845        gitweb_check_feature('remote_heads')
6846                or die_error(403, "Remote heads view is disabled");
6847
6848        my $head = git_get_head_hash($project);
6849        my $remote = $input_params{'hash'};
6850
6851        my $remotedata = git_get_remotes_list($remote);
6852        die_error(500, "Unable to get remote information") unless defined $remotedata;
6853
6854        unless (%$remotedata) {
6855                die_error(404, defined $remote ?
6856                        "Remote $remote not found" :
6857                        "No remotes found");
6858        }
6859
6860        git_header_html(undef, undef, -action_extra => $remote);
6861        git_print_page_nav('', '',  $head, undef, $head,
6862                format_ref_views($remote ? '' : 'remotes'));
6863
6864        fill_remote_heads($remotedata);
6865        if (defined $remote) {
6866                git_print_header_div('remotes', "$remote remote for $project");
6867                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6868        } else {
6869                git_print_header_div('summary', "$project remotes");
6870                git_remotes_body($remotedata, undef, $head);
6871        }
6872
6873        git_footer_html();
6874}
6875
6876sub git_blob_plain {
6877        my $type = shift;
6878        my $expires;
6879
6880        if (!defined $hash) {
6881                if (defined $file_name) {
6882                        my $base = $hash_base || git_get_head_hash($project);
6883                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6884                                or die_error(404, "Cannot find file");
6885                } else {
6886                        die_error(400, "No file name defined");
6887                }
6888        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6889                # blobs defined by non-textual hash id's can be cached
6890                $expires = "+1d";
6891        }
6892
6893        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6894                or die_error(500, "Open git-cat-file blob '$hash' failed");
6895
6896        # content-type (can include charset)
6897        $type = blob_contenttype($fd, $file_name, $type);
6898
6899        # "save as" filename, even when no $file_name is given
6900        my $save_as = "$hash";
6901        if (defined $file_name) {
6902                $save_as = $file_name;
6903        } elsif ($type =~ m/^text\//) {
6904                $save_as .= '.txt';
6905        }
6906
6907        # With XSS prevention on, blobs of all types except a few known safe
6908        # ones are served with "Content-Disposition: attachment" to make sure
6909        # they don't run in our security domain.  For certain image types,
6910        # blob view writes an <img> tag referring to blob_plain view, and we
6911        # want to be sure not to break that by serving the image as an
6912        # attachment (though Firefox 3 doesn't seem to care).
6913        my $sandbox = $prevent_xss &&
6914                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6915
6916        # serve text/* as text/plain
6917        if ($prevent_xss &&
6918            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6919             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6920                my $rest = $1;
6921                $rest = defined $rest ? $rest : '';
6922                $type = "text/plain$rest";
6923        }
6924
6925        print $cgi->header(
6926                -type => $type,
6927                -expires => $expires,
6928                -content_disposition =>
6929                        ($sandbox ? 'attachment' : 'inline')
6930                        . '; filename="' . $save_as . '"');
6931        local $/ = undef;
6932        binmode STDOUT, ':raw';
6933        print <$fd>;
6934        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6935        close $fd;
6936}
6937
6938sub git_blob {
6939        my $expires;
6940
6941        if (!defined $hash) {
6942                if (defined $file_name) {
6943                        my $base = $hash_base || git_get_head_hash($project);
6944                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6945                                or die_error(404, "Cannot find file");
6946                } else {
6947                        die_error(400, "No file name defined");
6948                }
6949        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6950                # blobs defined by non-textual hash id's can be cached
6951                $expires = "+1d";
6952        }
6953
6954        my $have_blame = gitweb_check_feature('blame');
6955        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6956                or die_error(500, "Couldn't cat $file_name, $hash");
6957        my $mimetype = blob_mimetype($fd, $file_name);
6958        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6959        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6960                close $fd;
6961                return git_blob_plain($mimetype);
6962        }
6963        # we can have blame only for text/* mimetype
6964        $have_blame &&= ($mimetype =~ m!^text/!);
6965
6966        my $highlight = gitweb_check_feature('highlight');
6967        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6968        $fd = run_highlighter($fd, $highlight, $syntax)
6969                if $syntax;
6970
6971        git_header_html(undef, $expires);
6972        my $formats_nav = '';
6973        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6974                if (defined $file_name) {
6975                        if ($have_blame) {
6976                                $formats_nav .=
6977                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6978                                                "blame") .
6979                                        " | ";
6980                        }
6981                        $formats_nav .=
6982                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6983                                        "history") .
6984                                " | " .
6985                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6986                                        "raw") .
6987                                " | " .
6988                                $cgi->a({-href => href(action=>"blob",
6989                                                       hash_base=>"HEAD", file_name=>$file_name)},
6990                                        "HEAD");
6991                } else {
6992                        $formats_nav .=
6993                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6994                                        "raw");
6995                }
6996                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6997                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6998        } else {
6999                print "<div class=\"page_nav\">\n" .
7000                      "<br/><br/></div>\n" .
7001                      "<div class=\"title\">".esc_html($hash)."</div>\n";
7002        }
7003        git_print_page_path($file_name, "blob", $hash_base);
7004        print "<div class=\"page_body\">\n";
7005        if ($mimetype =~ m!^image/!) {
7006                print qq!<img type="!.esc_attr($mimetype).qq!"!;
7007                if ($file_name) {
7008                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7009                }
7010                print qq! src="! .
7011                      href(action=>"blob_plain", hash=>$hash,
7012                           hash_base=>$hash_base, file_name=>$file_name) .
7013                      qq!" />\n!;
7014        } else {
7015                my $nr;
7016                while (my $line = <$fd>) {
7017                        chomp $line;
7018                        $nr++;
7019                        $line = untabify($line);
7020                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7021                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7022                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7023                }
7024        }
7025        close $fd
7026                or print "Reading blob failed.\n";
7027        print "</div>";
7028        git_footer_html();
7029}
7030
7031sub git_tree {
7032        if (!defined $hash_base) {
7033                $hash_base = "HEAD";
7034        }
7035        if (!defined $hash) {
7036                if (defined $file_name) {
7037                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7038                } else {
7039                        $hash = $hash_base;
7040                }
7041        }
7042        die_error(404, "No such tree") unless defined($hash);
7043
7044        my $show_sizes = gitweb_check_feature('show-sizes');
7045        my $have_blame = gitweb_check_feature('blame');
7046
7047        my @entries = ();
7048        {
7049                local $/ = "\0";
7050                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7051                        ($show_sizes ? '-l' : ()), @extra_options, $hash
7052                        or die_error(500, "Open git-ls-tree failed");
7053                @entries = map { chomp; $_ } <$fd>;
7054                close $fd
7055                        or die_error(404, "Reading tree failed");
7056        }
7057
7058        my $refs = git_get_references();
7059        my $ref = format_ref_marker($refs, $hash_base);
7060        git_header_html();
7061        my $basedir = '';
7062        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7063                my @views_nav = ();
7064                if (defined $file_name) {
7065                        push @views_nav,
7066                                $cgi->a({-href => href(action=>"history", -replay=>1)},
7067                                        "history"),
7068                                $cgi->a({-href => href(action=>"tree",
7069                                                       hash_base=>"HEAD", file_name=>$file_name)},
7070                                        "HEAD"),
7071                }
7072                my $snapshot_links = format_snapshot_links($hash);
7073                if (defined $snapshot_links) {
7074                        # FIXME: Should be available when we have no hash base as well.
7075                        push @views_nav, $snapshot_links;
7076                }
7077                git_print_page_nav('tree','', $hash_base, undef, undef,
7078                                   join(' | ', @views_nav));
7079                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7080        } else {
7081                undef $hash_base;
7082                print "<div class=\"page_nav\">\n";
7083                print "<br/><br/></div>\n";
7084                print "<div class=\"title\">".esc_html($hash)."</div>\n";
7085        }
7086        if (defined $file_name) {
7087                $basedir = $file_name;
7088                if ($basedir ne '' && substr($basedir, -1) ne '/') {
7089                        $basedir .= '/';
7090                }
7091                git_print_page_path($file_name, 'tree', $hash_base);
7092        }
7093        print "<div class=\"page_body\">\n";
7094        print "<table class=\"tree\">\n";
7095        my $alternate = 1;
7096        # '..' (top directory) link if possible
7097        if (defined $hash_base &&
7098            defined $file_name && $file_name =~ m![^/]+$!) {
7099                if ($alternate) {
7100                        print "<tr class=\"dark\">\n";
7101                } else {
7102                        print "<tr class=\"light\">\n";
7103                }
7104                $alternate ^= 1;
7105
7106                my $up = $file_name;
7107                $up =~ s!/?[^/]+$!!;
7108                undef $up unless $up;
7109                # based on git_print_tree_entry
7110                print '<td class="mode">' . mode_str('040000') . "</td>\n";
7111                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7112                print '<td class="list">';
7113                print $cgi->a({-href => href(action=>"tree",
7114                                             hash_base=>$hash_base,
7115                                             file_name=>$up)},
7116                              "..");
7117                print "</td>\n";
7118                print "<td class=\"link\"></td>\n";
7119
7120                print "</tr>\n";
7121        }
7122        foreach my $line (@entries) {
7123                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7124
7125                if ($alternate) {
7126                        print "<tr class=\"dark\">\n";
7127                } else {
7128                        print "<tr class=\"light\">\n";
7129                }
7130                $alternate ^= 1;
7131
7132                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7133
7134                print "</tr>\n";
7135        }
7136        print "</table>\n" .
7137              "</div>";
7138        git_footer_html();
7139}
7140
7141sub snapshot_name {
7142        my ($project, $hash) = @_;
7143
7144        # path/to/project.git  -> project
7145        # path/to/project/.git -> project
7146        my $name = to_utf8($project);
7147        $name =~ s,([^/])/*\.git$,$1,;
7148        $name = basename($name);
7149        # sanitize name
7150        $name =~ s/[[:cntrl:]]/?/g;
7151
7152        my $ver = $hash;
7153        if ($hash =~ /^[0-9a-fA-F]+$/) {
7154                # shorten SHA-1 hash
7155                my $full_hash = git_get_full_hash($project, $hash);
7156                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7157                        $ver = git_get_short_hash($project, $hash);
7158                }
7159        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7160                # tags don't need shortened SHA-1 hash
7161                $ver = $1;
7162        } else {
7163                # branches and other need shortened SHA-1 hash
7164                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7165                        $ver = $1;
7166                }
7167                $ver .= '-' . git_get_short_hash($project, $hash);
7168        }
7169        # in case of hierarchical branch names
7170        $ver =~ s!/!.!g;
7171
7172        # name = project-version_string
7173        $name = "$name-$ver";
7174
7175        return wantarray ? ($name, $name) : $name;
7176}
7177
7178sub exit_if_unmodified_since {
7179        my ($latest_epoch) = @_;
7180        our $cgi;
7181
7182        my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7183        if (defined $if_modified) {
7184                my $since;
7185                if (eval { require HTTP::Date; 1; }) {
7186                        $since = HTTP::Date::str2time($if_modified);
7187                } elsif (eval { require Time::ParseDate; 1; }) {
7188                        $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7189                }
7190                if (defined $since && $latest_epoch <= $since) {
7191                        my %latest_date = parse_date($latest_epoch);
7192                        print $cgi->header(
7193                                -last_modified => $latest_date{'rfc2822'},
7194                                -status => '304 Not Modified');
7195                        goto DONE_GITWEB;
7196                }
7197        }
7198}
7199
7200sub git_snapshot {
7201        my $format = $input_params{'snapshot_format'};
7202        if (!@snapshot_fmts) {
7203                die_error(403, "Snapshots not allowed");
7204        }
7205        # default to first supported snapshot format
7206        $format ||= $snapshot_fmts[0];
7207        if ($format !~ m/^[a-z0-9]+$/) {
7208                die_error(400, "Invalid snapshot format parameter");
7209        } elsif (!exists($known_snapshot_formats{$format})) {
7210                die_error(400, "Unknown snapshot format");
7211        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7212                die_error(403, "Snapshot format not allowed");
7213        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7214                die_error(403, "Unsupported snapshot format");
7215        }
7216
7217        my $type = git_get_type("$hash^{}");
7218        if (!$type) {
7219                die_error(404, 'Object does not exist');
7220        }  elsif ($type eq 'blob') {
7221                die_error(400, 'Object is not a tree-ish');
7222        }
7223
7224        my ($name, $prefix) = snapshot_name($project, $hash);
7225        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7226
7227        my %co = parse_commit($hash);
7228        exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7229
7230        my $cmd = quote_command(
7231                git_cmd(), 'archive',
7232                "--format=$known_snapshot_formats{$format}{'format'}",
7233                "--prefix=$prefix/", $hash);
7234        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7235                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7236        }
7237
7238        $filename =~ s/(["\\])/\\$1/g;
7239        my %latest_date;
7240        if (%co) {
7241                %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7242        }
7243
7244        print $cgi->header(
7245                -type => $known_snapshot_formats{$format}{'type'},
7246                -content_disposition => 'inline; filename="' . $filename . '"',
7247                %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7248                -status => '200 OK');
7249
7250        open my $fd, "-|", $cmd
7251                or die_error(500, "Execute git-archive failed");
7252        binmode STDOUT, ':raw';
7253        print <$fd>;
7254        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7255        close $fd;
7256}
7257
7258sub git_log_generic {
7259        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7260
7261        my $head = git_get_head_hash($project);
7262        if (!defined $base) {
7263                $base = $head;
7264        }
7265        if (!defined $page) {
7266                $page = 0;
7267        }
7268        my $refs = git_get_references();
7269
7270        my $commit_hash = $base;
7271        if (defined $parent) {
7272                $commit_hash = "$parent..$base";
7273        }
7274        my @commitlist =
7275                parse_commits($commit_hash, 101, (100 * $page),
7276                              defined $file_name ? ($file_name, "--full-history") : ());
7277
7278        my $ftype;
7279        if (!defined $file_hash && defined $file_name) {
7280                # some commits could have deleted file in question,
7281                # and not have it in tree, but one of them has to have it
7282                for (my $i = 0; $i < @commitlist; $i++) {
7283                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7284                        last if defined $file_hash;
7285                }
7286        }
7287        if (defined $file_hash) {
7288                $ftype = git_get_type($file_hash);
7289        }
7290        if (defined $file_name && !defined $ftype) {
7291                die_error(500, "Unknown type of object");
7292        }
7293        my %co;
7294        if (defined $file_name) {
7295                %co = parse_commit($base)
7296                        or die_error(404, "Unknown commit object");
7297        }
7298
7299
7300        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7301        my $next_link = '';
7302        if ($#commitlist >= 100) {
7303                $next_link =
7304                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7305                                 -accesskey => "n", -title => "Alt-n"}, "next");
7306        }
7307        my $patch_max = gitweb_get_feature('patches');
7308        if ($patch_max && !defined $file_name) {
7309                if ($patch_max < 0 || @commitlist <= $patch_max) {
7310                        $paging_nav .= " &sdot; " .
7311                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7312                                        "patches");
7313                }
7314        }
7315
7316        git_header_html();
7317        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7318        if (defined $file_name) {
7319                git_print_header_div('commit', esc_html($co{'title'}), $base);
7320        } else {
7321                git_print_header_div('summary', $project)
7322        }
7323        git_print_page_path($file_name, $ftype, $hash_base)
7324                if (defined $file_name);
7325
7326        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7327                     $file_name, $file_hash, $ftype);
7328
7329        git_footer_html();
7330}
7331
7332sub git_log {
7333        git_log_generic('log', \&git_log_body,
7334                        $hash, $hash_parent);
7335}
7336
7337sub git_commit {
7338        $hash ||= $hash_base || "HEAD";
7339        my %co = parse_commit($hash)
7340            or die_error(404, "Unknown commit object");
7341
7342        my $parent  = $co{'parent'};
7343        my $parents = $co{'parents'}; # listref
7344
7345        # we need to prepare $formats_nav before any parameter munging
7346        my $formats_nav;
7347        if (!defined $parent) {
7348                # --root commitdiff
7349                $formats_nav .= '(initial)';
7350        } elsif (@$parents == 1) {
7351                # single parent commit
7352                $formats_nav .=
7353                        '(parent: ' .
7354                        $cgi->a({-href => href(action=>"commit",
7355                                               hash=>$parent)},
7356                                esc_html(substr($parent, 0, 7))) .
7357                        ')';
7358        } else {
7359                # merge commit
7360                $formats_nav .=
7361                        '(merge: ' .
7362                        join(' ', map {
7363                                $cgi->a({-href => href(action=>"commit",
7364                                                       hash=>$_)},
7365                                        esc_html(substr($_, 0, 7)));
7366                        } @$parents ) .
7367                        ')';
7368        }
7369        if (gitweb_check_feature('patches') && @$parents <= 1) {
7370                $formats_nav .= " | " .
7371                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7372                                "patch");
7373        }
7374
7375        if (!defined $parent) {
7376                $parent = "--root";
7377        }
7378        my @difftree;
7379        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7380                @diff_opts,
7381                (@$parents <= 1 ? $parent : '-c'),
7382                $hash, "--"
7383                or die_error(500, "Open git-diff-tree failed");
7384        @difftree = map { chomp; $_ } <$fd>;
7385        close $fd or die_error(404, "Reading git-diff-tree failed");
7386
7387        # non-textual hash id's can be cached
7388        my $expires;
7389        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7390                $expires = "+1d";
7391        }
7392        my $refs = git_get_references();
7393        my $ref = format_ref_marker($refs, $co{'id'});
7394
7395        git_header_html(undef, $expires);
7396        git_print_page_nav('commit', '',
7397                           $hash, $co{'tree'}, $hash,
7398                           $formats_nav);
7399
7400        if (defined $co{'parent'}) {
7401                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7402        } else {
7403                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7404        }
7405        print "<div class=\"title_text\">\n" .
7406              "<table class=\"object_header\">\n";
7407        git_print_authorship_rows(\%co);
7408        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7409        print "<tr>" .
7410              "<td>tree</td>" .
7411              "<td class=\"sha1\">" .
7412              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7413                       class => "list"}, $co{'tree'}) .
7414              "</td>" .
7415              "<td class=\"link\">" .
7416              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7417                      "tree");
7418        my $snapshot_links = format_snapshot_links($hash);
7419        if (defined $snapshot_links) {
7420                print " | " . $snapshot_links;
7421        }
7422        print "</td>" .
7423              "</tr>\n";
7424
7425        foreach my $par (@$parents) {
7426                print "<tr>" .
7427                      "<td>parent</td>" .
7428                      "<td class=\"sha1\">" .
7429                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7430                               class => "list"}, $par) .
7431                      "</td>" .
7432                      "<td class=\"link\">" .
7433                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7434                      " | " .
7435                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7436                      "</td>" .
7437                      "</tr>\n";
7438        }
7439        print "</table>".
7440              "</div>\n";
7441
7442        print "<div class=\"page_body\">\n";
7443        git_print_log($co{'comment'});
7444        print "</div>\n";
7445
7446        git_difftree_body(\@difftree, $hash, @$parents);
7447
7448        git_footer_html();
7449}
7450
7451sub git_object {
7452        # object is defined by:
7453        # - hash or hash_base alone
7454        # - hash_base and file_name
7455        my $type;
7456
7457        # - hash or hash_base alone
7458        if ($hash || ($hash_base && !defined $file_name)) {
7459                my $object_id = $hash || $hash_base;
7460
7461                open my $fd, "-|", quote_command(
7462                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7463                        or die_error(404, "Object does not exist");
7464                $type = <$fd>;
7465                chomp $type;
7466                close $fd
7467                        or die_error(404, "Object does not exist");
7468
7469        # - hash_base and file_name
7470        } elsif ($hash_base && defined $file_name) {
7471                $file_name =~ s,/+$,,;
7472
7473                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7474                        or die_error(404, "Base object does not exist");
7475
7476                # here errors should not hapen
7477                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7478                        or die_error(500, "Open git-ls-tree failed");
7479                my $line = <$fd>;
7480                close $fd;
7481
7482                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7483                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7484                        die_error(404, "File or directory for given base does not exist");
7485                }
7486                $type = $2;
7487                $hash = $3;
7488        } else {
7489                die_error(400, "Not enough information to find object");
7490        }
7491
7492        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7493                                          hash=>$hash, hash_base=>$hash_base,
7494                                          file_name=>$file_name),
7495                             -status => '302 Found');
7496}
7497
7498sub git_blobdiff {
7499        my $format = shift || 'html';
7500        my $diff_style = $input_params{'diff_style'} || 'inline';
7501
7502        my $fd;
7503        my @difftree;
7504        my %diffinfo;
7505        my $expires;
7506
7507        # preparing $fd and %diffinfo for git_patchset_body
7508        # new style URI
7509        if (defined $hash_base && defined $hash_parent_base) {
7510                if (defined $file_name) {
7511                        # read raw output
7512                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7513                                $hash_parent_base, $hash_base,
7514                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7515                                or die_error(500, "Open git-diff-tree failed");
7516                        @difftree = map { chomp; $_ } <$fd>;
7517                        close $fd
7518                                or die_error(404, "Reading git-diff-tree failed");
7519                        @difftree
7520                                or die_error(404, "Blob diff not found");
7521
7522                } elsif (defined $hash &&
7523                         $hash =~ /[0-9a-fA-F]{40}/) {
7524                        # try to find filename from $hash
7525
7526                        # read filtered raw output
7527                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7528                                $hash_parent_base, $hash_base, "--"
7529                                or die_error(500, "Open git-diff-tree failed");
7530                        @difftree =
7531                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7532                                # $hash == to_id
7533                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7534                                map { chomp; $_ } <$fd>;
7535                        close $fd
7536                                or die_error(404, "Reading git-diff-tree failed");
7537                        @difftree
7538                                or die_error(404, "Blob diff not found");
7539
7540                } else {
7541                        die_error(400, "Missing one of the blob diff parameters");
7542                }
7543
7544                if (@difftree > 1) {
7545                        die_error(400, "Ambiguous blob diff specification");
7546                }
7547
7548                %diffinfo = parse_difftree_raw_line($difftree[0]);
7549                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7550                $file_name   ||= $diffinfo{'to_file'};
7551
7552                $hash_parent ||= $diffinfo{'from_id'};
7553                $hash        ||= $diffinfo{'to_id'};
7554
7555                # non-textual hash id's can be cached
7556                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7557                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7558                        $expires = '+1d';
7559                }
7560
7561                # open patch output
7562                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7563                        '-p', ($format eq 'html' ? "--full-index" : ()),
7564                        $hash_parent_base, $hash_base,
7565                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7566                        or die_error(500, "Open git-diff-tree failed");
7567        }
7568
7569        # old/legacy style URI -- not generated anymore since 1.4.3.
7570        if (!%diffinfo) {
7571                die_error('404 Not Found', "Missing one of the blob diff parameters")
7572        }
7573
7574        # header
7575        if ($format eq 'html') {
7576                my $formats_nav =
7577                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7578                                "raw");
7579                $formats_nav .= diff_style_nav($diff_style);
7580                git_header_html(undef, $expires);
7581                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7582                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7583                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7584                } else {
7585                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7586                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7587                }
7588                if (defined $file_name) {
7589                        git_print_page_path($file_name, "blob", $hash_base);
7590                } else {
7591                        print "<div class=\"page_path\"></div>\n";
7592                }
7593
7594        } elsif ($format eq 'plain') {
7595                print $cgi->header(
7596                        -type => 'text/plain',
7597                        -charset => 'utf-8',
7598                        -expires => $expires,
7599                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7600
7601                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7602
7603        } else {
7604                die_error(400, "Unknown blobdiff format");
7605        }
7606
7607        # patch
7608        if ($format eq 'html') {
7609                print "<div class=\"page_body\">\n";
7610
7611                git_patchset_body($fd, $diff_style,
7612                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7613                close $fd;
7614
7615                print "</div>\n"; # class="page_body"
7616                git_footer_html();
7617
7618        } else {
7619                while (my $line = <$fd>) {
7620                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7621                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7622
7623                        print $line;
7624
7625                        last if $line =~ m!^\+\+\+!;
7626                }
7627                local $/ = undef;
7628                print <$fd>;
7629                close $fd;
7630        }
7631}
7632
7633sub git_blobdiff_plain {
7634        git_blobdiff('plain');
7635}
7636
7637# assumes that it is added as later part of already existing navigation,
7638# so it returns "| foo | bar" rather than just "foo | bar"
7639sub diff_style_nav {
7640        my ($diff_style, $is_combined) = @_;
7641        $diff_style ||= 'inline';
7642
7643        return "" if ($is_combined);
7644
7645        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7646        my %styles = @styles;
7647        @styles =
7648                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7649
7650        return join '',
7651                map { " | ".$_ }
7652                map {
7653                        $_ eq $diff_style ? $styles{$_} :
7654                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7655                } @styles;
7656}
7657
7658sub git_commitdiff {
7659        my %params = @_;
7660        my $format = $params{-format} || 'html';
7661        my $diff_style = $input_params{'diff_style'} || 'inline';
7662
7663        my ($patch_max) = gitweb_get_feature('patches');
7664        if ($format eq 'patch') {
7665                die_error(403, "Patch view not allowed") unless $patch_max;
7666        }
7667
7668        $hash ||= $hash_base || "HEAD";
7669        my %co = parse_commit($hash)
7670            or die_error(404, "Unknown commit object");
7671
7672        # choose format for commitdiff for merge
7673        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7674                $hash_parent = '--cc';
7675        }
7676        # we need to prepare $formats_nav before almost any parameter munging
7677        my $formats_nav;
7678        if ($format eq 'html') {
7679                $formats_nav =
7680                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7681                                "raw");
7682                if ($patch_max && @{$co{'parents'}} <= 1) {
7683                        $formats_nav .= " | " .
7684                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7685                                        "patch");
7686                }
7687                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7688
7689                if (defined $hash_parent &&
7690                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7691                        # commitdiff with two commits given
7692                        my $hash_parent_short = $hash_parent;
7693                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7694                                $hash_parent_short = substr($hash_parent, 0, 7);
7695                        }
7696                        $formats_nav .=
7697                                ' (from';
7698                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7699                                if ($co{'parents'}[$i] eq $hash_parent) {
7700                                        $formats_nav .= ' parent ' . ($i+1);
7701                                        last;
7702                                }
7703                        }
7704                        $formats_nav .= ': ' .
7705                                $cgi->a({-href => href(-replay=>1,
7706                                                       hash=>$hash_parent, hash_base=>undef)},
7707                                        esc_html($hash_parent_short)) .
7708                                ')';
7709                } elsif (!$co{'parent'}) {
7710                        # --root commitdiff
7711                        $formats_nav .= ' (initial)';
7712                } elsif (scalar @{$co{'parents'}} == 1) {
7713                        # single parent commit
7714                        $formats_nav .=
7715                                ' (parent: ' .
7716                                $cgi->a({-href => href(-replay=>1,
7717                                                       hash=>$co{'parent'}, hash_base=>undef)},
7718                                        esc_html(substr($co{'parent'}, 0, 7))) .
7719                                ')';
7720                } else {
7721                        # merge commit
7722                        if ($hash_parent eq '--cc') {
7723                                $formats_nav .= ' | ' .
7724                                        $cgi->a({-href => href(-replay=>1,
7725                                                               hash=>$hash, hash_parent=>'-c')},
7726                                                'combined');
7727                        } else { # $hash_parent eq '-c'
7728                                $formats_nav .= ' | ' .
7729                                        $cgi->a({-href => href(-replay=>1,
7730                                                               hash=>$hash, hash_parent=>'--cc')},
7731                                                'compact');
7732                        }
7733                        $formats_nav .=
7734                                ' (merge: ' .
7735                                join(' ', map {
7736                                        $cgi->a({-href => href(-replay=>1,
7737                                                               hash=>$_, hash_base=>undef)},
7738                                                esc_html(substr($_, 0, 7)));
7739                                } @{$co{'parents'}} ) .
7740                                ')';
7741                }
7742        }
7743
7744        my $hash_parent_param = $hash_parent;
7745        if (!defined $hash_parent_param) {
7746                # --cc for multiple parents, --root for parentless
7747                $hash_parent_param =
7748                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7749        }
7750
7751        # read commitdiff
7752        my $fd;
7753        my @difftree;
7754        if ($format eq 'html') {
7755                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7756                        "--no-commit-id", "--patch-with-raw", "--full-index",
7757                        $hash_parent_param, $hash, "--"
7758                        or die_error(500, "Open git-diff-tree failed");
7759
7760                while (my $line = <$fd>) {
7761                        chomp $line;
7762                        # empty line ends raw part of diff-tree output
7763                        last unless $line;
7764                        push @difftree, scalar parse_difftree_raw_line($line);
7765                }
7766
7767        } elsif ($format eq 'plain') {
7768                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7769                        '-p', $hash_parent_param, $hash, "--"
7770                        or die_error(500, "Open git-diff-tree failed");
7771        } elsif ($format eq 'patch') {
7772                # For commit ranges, we limit the output to the number of
7773                # patches specified in the 'patches' feature.
7774                # For single commits, we limit the output to a single patch,
7775                # diverging from the git-format-patch default.
7776                my @commit_spec = ();
7777                if ($hash_parent) {
7778                        if ($patch_max > 0) {
7779                                push @commit_spec, "-$patch_max";
7780                        }
7781                        push @commit_spec, '-n', "$hash_parent..$hash";
7782                } else {
7783                        if ($params{-single}) {
7784                                push @commit_spec, '-1';
7785                        } else {
7786                                if ($patch_max > 0) {
7787                                        push @commit_spec, "-$patch_max";
7788                                }
7789                                push @commit_spec, "-n";
7790                        }
7791                        push @commit_spec, '--root', $hash;
7792                }
7793                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7794                        '--encoding=utf8', '--stdout', @commit_spec
7795                        or die_error(500, "Open git-format-patch failed");
7796        } else {
7797                die_error(400, "Unknown commitdiff format");
7798        }
7799
7800        # non-textual hash id's can be cached
7801        my $expires;
7802        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7803                $expires = "+1d";
7804        }
7805
7806        # write commit message
7807        if ($format eq 'html') {
7808                my $refs = git_get_references();
7809                my $ref = format_ref_marker($refs, $co{'id'});
7810
7811                git_header_html(undef, $expires);
7812                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7813                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7814                print "<div class=\"title_text\">\n" .
7815                      "<table class=\"object_header\">\n";
7816                git_print_authorship_rows(\%co);
7817                print "</table>".
7818                      "</div>\n";
7819                print "<div class=\"page_body\">\n";
7820                if (@{$co{'comment'}} > 1) {
7821                        print "<div class=\"log\">\n";
7822                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7823                        print "</div>\n"; # class="log"
7824                }
7825
7826        } elsif ($format eq 'plain') {
7827                my $refs = git_get_references("tags");
7828                my $tagname = git_get_rev_name_tags($hash);
7829                my $filename = basename($project) . "-$hash.patch";
7830
7831                print $cgi->header(
7832                        -type => 'text/plain',
7833                        -charset => 'utf-8',
7834                        -expires => $expires,
7835                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7836                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7837                print "From: " . to_utf8($co{'author'}) . "\n";
7838                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7839                print "Subject: " . to_utf8($co{'title'}) . "\n";
7840
7841                print "X-Git-Tag: $tagname\n" if $tagname;
7842                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7843
7844                foreach my $line (@{$co{'comment'}}) {
7845                        print to_utf8($line) . "\n";
7846                }
7847                print "---\n\n";
7848        } elsif ($format eq 'patch') {
7849                my $filename = basename($project) . "-$hash.patch";
7850
7851                print $cgi->header(
7852                        -type => 'text/plain',
7853                        -charset => 'utf-8',
7854                        -expires => $expires,
7855                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7856        }
7857
7858        # write patch
7859        if ($format eq 'html') {
7860                my $use_parents = !defined $hash_parent ||
7861                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7862                git_difftree_body(\@difftree, $hash,
7863                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7864                print "<br/>\n";
7865
7866                git_patchset_body($fd, $diff_style,
7867                                  \@difftree, $hash,
7868                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7869                close $fd;
7870                print "</div>\n"; # class="page_body"
7871                git_footer_html();
7872
7873        } elsif ($format eq 'plain') {
7874                local $/ = undef;
7875                print <$fd>;
7876                close $fd
7877                        or print "Reading git-diff-tree failed\n";
7878        } elsif ($format eq 'patch') {
7879                local $/ = undef;
7880                print <$fd>;
7881                close $fd
7882                        or print "Reading git-format-patch failed\n";
7883        }
7884}
7885
7886sub git_commitdiff_plain {
7887        git_commitdiff(-format => 'plain');
7888}
7889
7890# format-patch-style patches
7891sub git_patch {
7892        git_commitdiff(-format => 'patch', -single => 1);
7893}
7894
7895sub git_patches {
7896        git_commitdiff(-format => 'patch');
7897}
7898
7899sub git_history {
7900        git_log_generic('history', \&git_history_body,
7901                        $hash_base, $hash_parent_base,
7902                        $file_name, $hash);
7903}
7904
7905sub git_search {
7906        $searchtype ||= 'commit';
7907
7908        # check if appropriate features are enabled
7909        gitweb_check_feature('search')
7910                or die_error(403, "Search is disabled");
7911        if ($searchtype eq 'pickaxe') {
7912                # pickaxe may take all resources of your box and run for several minutes
7913                # with every query - so decide by yourself how public you make this feature
7914                gitweb_check_feature('pickaxe')
7915                        or die_error(403, "Pickaxe search is disabled");
7916        }
7917        if ($searchtype eq 'grep') {
7918                # grep search might be potentially CPU-intensive, too
7919                gitweb_check_feature('grep')
7920                        or die_error(403, "Grep search is disabled");
7921        }
7922
7923        if (!defined $searchtext) {
7924                die_error(400, "Text field is empty");
7925        }
7926        if (!defined $hash) {
7927                $hash = git_get_head_hash($project);
7928        }
7929        my %co = parse_commit($hash);
7930        if (!%co) {
7931                die_error(404, "Unknown commit object");
7932        }
7933        if (!defined $page) {
7934                $page = 0;
7935        }
7936
7937        if ($searchtype eq 'commit' ||
7938            $searchtype eq 'author' ||
7939            $searchtype eq 'committer') {
7940                git_search_message(%co);
7941        } elsif ($searchtype eq 'pickaxe') {
7942                git_search_changes(%co);
7943        } elsif ($searchtype eq 'grep') {
7944                git_search_files(%co);
7945        } else {
7946                die_error(400, "Unknown search type");
7947        }
7948}
7949
7950sub git_search_help {
7951        git_header_html();
7952        git_print_page_nav('','', $hash,$hash,$hash);
7953        print <<EOT;
7954<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7955regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7956the pattern entered is recognized as the POSIX extended
7957<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7958insensitive).</p>
7959<dl>
7960<dt><b>commit</b></dt>
7961<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7962EOT
7963        my $have_grep = gitweb_check_feature('grep');
7964        if ($have_grep) {
7965                print <<EOT;
7966<dt><b>grep</b></dt>
7967<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7968    a different one) are searched for the given pattern. On large trees, this search can take
7969a while and put some strain on the server, so please use it with some consideration. Note that
7970due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7971case-sensitive.</dd>
7972EOT
7973        }
7974        print <<EOT;
7975<dt><b>author</b></dt>
7976<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7977<dt><b>committer</b></dt>
7978<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7979EOT
7980        my $have_pickaxe = gitweb_check_feature('pickaxe');
7981        if ($have_pickaxe) {
7982                print <<EOT;
7983<dt><b>pickaxe</b></dt>
7984<dd>All commits that caused the string to appear or disappear from any file (changes that
7985added, removed or "modified" the string) will be listed. This search can take a while and
7986takes a lot of strain on the server, so please use it wisely. Note that since you may be
7987interested even in changes just changing the case as well, this search is case sensitive.</dd>
7988EOT
7989        }
7990        print "</dl>\n";
7991        git_footer_html();
7992}
7993
7994sub git_shortlog {
7995        git_log_generic('shortlog', \&git_shortlog_body,
7996                        $hash, $hash_parent);
7997}
7998
7999## ......................................................................
8000## feeds (RSS, Atom; OPML)
8001
8002sub git_feed {
8003        my $format = shift || 'atom';
8004        my $have_blame = gitweb_check_feature('blame');
8005
8006        # Atom: http://www.atomenabled.org/developers/syndication/
8007        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8008        if ($format ne 'rss' && $format ne 'atom') {
8009                die_error(400, "Unknown web feed format");
8010        }
8011
8012        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8013        my $head = $hash || 'HEAD';
8014        my @commitlist = parse_commits($head, 150, 0, $file_name);
8015
8016        my %latest_commit;
8017        my %latest_date;
8018        my $content_type = "application/$format+xml";
8019        if (defined $cgi->http('HTTP_ACCEPT') &&
8020                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8021                # browser (feed reader) prefers text/xml
8022                $content_type = 'text/xml';
8023        }
8024        if (defined($commitlist[0])) {
8025                %latest_commit = %{$commitlist[0]};
8026                my $latest_epoch = $latest_commit{'committer_epoch'};
8027                exit_if_unmodified_since($latest_epoch);
8028                %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8029        }
8030        print $cgi->header(
8031                -type => $content_type,
8032                -charset => 'utf-8',
8033                %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8034                -status => '200 OK');
8035
8036        # Optimization: skip generating the body if client asks only
8037        # for Last-Modified date.
8038        return if ($cgi->request_method() eq 'HEAD');
8039
8040        # header variables
8041        my $title = "$site_name - $project/$action";
8042        my $feed_type = 'log';
8043        if (defined $hash) {
8044                $title .= " - '$hash'";
8045                $feed_type = 'branch log';
8046                if (defined $file_name) {
8047                        $title .= " :: $file_name";
8048                        $feed_type = 'history';
8049                }
8050        } elsif (defined $file_name) {
8051                $title .= " - $file_name";
8052                $feed_type = 'history';
8053        }
8054        $title .= " $feed_type";
8055        my $descr = git_get_project_description($project);
8056        if (defined $descr) {
8057                $descr = esc_html($descr);
8058        } else {
8059                $descr = "$project " .
8060                         ($format eq 'rss' ? 'RSS' : 'Atom') .
8061                         " feed";
8062        }
8063        my $owner = git_get_project_owner($project);
8064        $owner = esc_html($owner);
8065
8066        #header
8067        my $alt_url;
8068        if (defined $file_name) {
8069                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8070        } elsif (defined $hash) {
8071                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8072        } else {
8073                $alt_url = href(-full=>1, action=>"summary");
8074        }
8075        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8076        if ($format eq 'rss') {
8077                print <<XML;
8078<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8079<channel>
8080XML
8081                print "<title>$title</title>\n" .
8082                      "<link>$alt_url</link>\n" .
8083                      "<description>$descr</description>\n" .
8084                      "<language>en</language>\n" .
8085                      # project owner is responsible for 'editorial' content
8086                      "<managingEditor>$owner</managingEditor>\n";
8087                if (defined $logo || defined $favicon) {
8088                        # prefer the logo to the favicon, since RSS
8089                        # doesn't allow both
8090                        my $img = esc_url($logo || $favicon);
8091                        print "<image>\n" .
8092                              "<url>$img</url>\n" .
8093                              "<title>$title</title>\n" .
8094                              "<link>$alt_url</link>\n" .
8095                              "</image>\n";
8096                }
8097                if (%latest_date) {
8098                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8099                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8100                }
8101                print "<generator>gitweb v.$version/$git_version</generator>\n";
8102        } elsif ($format eq 'atom') {
8103                print <<XML;
8104<feed xmlns="http://www.w3.org/2005/Atom">
8105XML
8106                print "<title>$title</title>\n" .
8107                      "<subtitle>$descr</subtitle>\n" .
8108                      '<link rel="alternate" type="text/html" href="' .
8109                      $alt_url . '" />' . "\n" .
8110                      '<link rel="self" type="' . $content_type . '" href="' .
8111                      $cgi->self_url() . '" />' . "\n" .
8112                      "<id>" . href(-full=>1) . "</id>\n" .
8113                      # use project owner for feed author
8114                      "<author><name>$owner</name></author>\n";
8115                if (defined $favicon) {
8116                        print "<icon>" . esc_url($favicon) . "</icon>\n";
8117                }
8118                if (defined $logo) {
8119                        # not twice as wide as tall: 72 x 27 pixels
8120                        print "<logo>" . esc_url($logo) . "</logo>\n";
8121                }
8122                if (! %latest_date) {
8123                        # dummy date to keep the feed valid until commits trickle in:
8124                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
8125                } else {
8126                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
8127                }
8128                print "<generator version='$version/$git_version'>gitweb</generator>\n";
8129        }
8130
8131        # contents
8132        for (my $i = 0; $i <= $#commitlist; $i++) {
8133                my %co = %{$commitlist[$i]};
8134                my $commit = $co{'id'};
8135                # we read 150, we always show 30 and the ones more recent than 48 hours
8136                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8137                        last;
8138                }
8139                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8140
8141                # get list of changed files
8142                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8143                        $co{'parent'} || "--root",
8144                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
8145                        or next;
8146                my @difftree = map { chomp; $_ } <$fd>;
8147                close $fd
8148                        or next;
8149
8150                # print element (entry, item)
8151                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8152                if ($format eq 'rss') {
8153                        print "<item>\n" .
8154                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8155                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8156                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8157                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8158                              "<link>$co_url</link>\n" .
8159                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8160                              "<content:encoded>" .
8161                              "<![CDATA[\n";
8162                } elsif ($format eq 'atom') {
8163                        print "<entry>\n" .
8164                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8165                              "<updated>$cd{'iso-8601'}</updated>\n" .
8166                              "<author>\n" .
8167                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8168                        if ($co{'author_email'}) {
8169                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8170                        }
8171                        print "</author>\n" .
8172                              # use committer for contributor
8173                              "<contributor>\n" .
8174                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8175                        if ($co{'committer_email'}) {
8176                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8177                        }
8178                        print "</contributor>\n" .
8179                              "<published>$cd{'iso-8601'}</published>\n" .
8180                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8181                              "<id>$co_url</id>\n" .
8182                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8183                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8184                }
8185                my $comment = $co{'comment'};
8186                print "<pre>\n";
8187                foreach my $line (@$comment) {
8188                        $line = esc_html($line);
8189                        print "$line\n";
8190                }
8191                print "</pre><ul>\n";
8192                foreach my $difftree_line (@difftree) {
8193                        my %difftree = parse_difftree_raw_line($difftree_line);
8194                        next if !$difftree{'from_id'};
8195
8196                        my $file = $difftree{'file'} || $difftree{'to_file'};
8197
8198                        print "<li>" .
8199                              "[" .
8200                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8201                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8202                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8203                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8204                                      -title => "diff"}, 'D');
8205                        if ($have_blame) {
8206                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8207                                                             file_name=>$file, hash_base=>$commit),
8208                                              -title => "blame"}, 'B');
8209                        }
8210                        # if this is not a feed of a file history
8211                        if (!defined $file_name || $file_name ne $file) {
8212                                print $cgi->a({-href => href(-full=>1, action=>"history",
8213                                                             file_name=>$file, hash=>$commit),
8214                                              -title => "history"}, 'H');
8215                        }
8216                        $file = esc_path($file);
8217                        print "] ".
8218                              "$file</li>\n";
8219                }
8220                if ($format eq 'rss') {
8221                        print "</ul>]]>\n" .
8222                              "</content:encoded>\n" .
8223                              "</item>\n";
8224                } elsif ($format eq 'atom') {
8225                        print "</ul>\n</div>\n" .
8226                              "</content>\n" .
8227                              "</entry>\n";
8228                }
8229        }
8230
8231        # end of feed
8232        if ($format eq 'rss') {
8233                print "</channel>\n</rss>\n";
8234        } elsif ($format eq 'atom') {
8235                print "</feed>\n";
8236        }
8237}
8238
8239sub git_rss {
8240        git_feed('rss');
8241}
8242
8243sub git_atom {
8244        git_feed('atom');
8245}
8246
8247sub git_opml {
8248        my @list = git_get_projects_list($project_filter, $strict_export);
8249        if (!@list) {
8250                die_error(404, "No projects found");
8251        }
8252
8253        print $cgi->header(
8254                -type => 'text/xml',
8255                -charset => 'utf-8',
8256                -content_disposition => 'inline; filename="opml.xml"');
8257
8258        my $title = esc_html($site_name);
8259        my $filter = " within subdirectory ";
8260        if (defined $project_filter) {
8261                $filter .= esc_html($project_filter);
8262        } else {
8263                $filter = "";
8264        }
8265        print <<XML;
8266<?xml version="1.0" encoding="utf-8"?>
8267<opml version="1.0">
8268<head>
8269  <title>$title OPML Export$filter</title>
8270</head>
8271<body>
8272<outline text="git RSS feeds">
8273XML
8274
8275        foreach my $pr (@list) {
8276                my %proj = %$pr;
8277                my $head = git_get_head_hash($proj{'path'});
8278                if (!defined $head) {
8279                        next;
8280                }
8281                $git_dir = "$projectroot/$proj{'path'}";
8282                my %co = parse_commit($head);
8283                if (!%co) {
8284                        next;
8285                }
8286
8287                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8288                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8289                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8290                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8291        }
8292        print <<XML;
8293</outline>
8294</body>
8295</opml>
8296XML
8297}