gitweb / gitweb.perlon commit Merge branch 'jc/am-3-nonstandard-popt' into maint (b91a13b)
   1#!/usr/bin/perl
   2
   3# gitweb - simple web interface to track changes in git repositories
   4#
   5# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6# (C) 2005, Christian Gierke
   7#
   8# This program is licensed under the GPLv2
   9
  10use 5.008;
  11use strict;
  12use warnings;
  13use CGI qw(:standard :escapeHTML -nosticky);
  14use CGI::Util qw(unescape);
  15use CGI::Carp qw(fatalsToBrowser set_message);
  16use Encode;
  17use Fcntl ':mode';
  18use File::Find qw();
  19use File::Basename qw(basename);
  20use Time::HiRes qw(gettimeofday tv_interval);
  21binmode STDOUT, ':utf8';
  22
  23our $t0 = [ gettimeofday() ];
  24our $number_of_git_cmds = 0;
  25
  26BEGIN {
  27        CGI->compile() if $ENV{'MOD_PERL'};
  28}
  29
  30our $version = "++GIT_VERSION++";
  31
  32our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33sub evaluate_uri {
  34        our $cgi;
  35
  36        our $my_url = $cgi->url();
  37        our $my_uri = $cgi->url(-absolute => 1);
  38
  39        # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40        # needed and used only for URLs with nonempty PATH_INFO
  41        our $base_url = $my_url;
  42
  43        # When the script is used as DirectoryIndex, the URL does not contain the name
  44        # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45        # have to do it ourselves. We make $path_info global because it's also used
  46        # later on.
  47        #
  48        # Another issue with the script being the DirectoryIndex is that the resulting
  49        # $my_url data is not the full script URL: this is good, because we want
  50        # generated links to keep implying the script name if it wasn't explicitly
  51        # indicated in the URL we're handling, but it means that $my_url cannot be used
  52        # as base URL.
  53        # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54        # to build the base URL ourselves:
  55        our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56        if ($path_info) {
  57                if ($my_url =~ s,\Q$path_info\E$,, &&
  58                    $my_uri =~ s,\Q$path_info\E$,, &&
  59                    defined $ENV{'SCRIPT_NAME'}) {
  60                        $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                }
  62        }
  63
  64        # target of the home link on top of all pages
  65        our $home_link = $my_uri || "/";
  66}
  67
  68# core git executable to use
  69# this can just be "git" if your webserver has a sensible PATH
  70our $GIT = "++GIT_BINDIR++/git";
  71
  72# absolute fs-path which will be prepended to the project path
  73#our $projectroot = "/pub/scm";
  74our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76# fs traversing limit for getting project list
  77# the number is relative to the projectroot
  78our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80# string of the home link on top of all pages
  81our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83# name of your site or organization to appear in page titles
  84# replace this with something more descriptive for clearer bookmarks
  85our $site_name = "++GITWEB_SITENAME++"
  86                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88# html snippet to include in the <head> section of each page
  89our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90# filename of html text to include at top of each page
  91our $site_header = "++GITWEB_SITE_HEADER++";
  92# html text to include at home page
  93our $home_text = "++GITWEB_HOMETEXT++";
  94# filename of html text to include at bottom of each page
  95our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97# URI of stylesheets
  98our @stylesheets = ("++GITWEB_CSS++");
  99# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100our $stylesheet = undef;
 101# URI of GIT logo (72x27 size)
 102our $logo = "++GITWEB_LOGO++";
 103# URI of GIT favicon, assumed to be image/png type
 104our $favicon = "++GITWEB_FAVICON++";
 105# URI of gitweb.js (JavaScript code for gitweb)
 106our $javascript = "++GITWEB_JS++";
 107
 108# URI and label (title) of GIT logo link
 109#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110#our $logo_label = "git documentation";
 111our $logo_url = "http://git-scm.com/";
 112our $logo_label = "git homepage";
 113
 114# source of projects list
 115our $projects_list = "++GITWEB_LIST++";
 116
 117# the width (in characters) of the projects list "Description" column
 118our $projects_list_description_width = 25;
 119
 120# group projects by category on the projects list
 121# (enabled if this variable evaluates to true)
 122our $projects_list_group_categories = 0;
 123
 124# default category if none specified
 125# (leave the empty string for no category)
 126our $project_list_default_category = "";
 127
 128# default order of projects list
 129# valid values are none, project, descr, owner, and age
 130our $default_projects_order = "project";
 131
 132# show repository only if this file exists
 133# (only effective if this variable evaluates to true)
 134our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136# show repository only if this subroutine returns true
 137# when given the path to the project, for example:
 138#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139our $export_auth_hook = undef;
 140
 141# only allow viewing of repositories also shown on the overview page
 142our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144# list of git base URLs used for URL to where fetch project from,
 145# i.e. full URL is "$git_base_url/$project"
 146our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148# default blob_plain mimetype and default charset for text/plain blob
 149our $default_blob_plain_mimetype = 'text/plain';
 150our $default_text_plain_charset  = undef;
 151
 152# file to use for guessing MIME types before trying /etc/mime.types
 153# (relative to the current git repository)
 154our $mimetypes_file = undef;
 155
 156# assume this charset if line contains non-UTF-8 characters;
 157# it should be valid encoding (see Encoding::Supported(3pm) for list),
 158# for which encoding all byte sequences are valid, for example
 159# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160# could be even 'utf-8' for the old behavior)
 161our $fallback_encoding = 'latin1';
 162
 163# rename detection options for git-diff and git-diff-tree
 164# - default is '-M', with the cost proportional to
 165#   (number of removed files) * (number of new files).
 166# - more costly is '-C' (which implies '-M'), with the cost proportional to
 167#   (number of changed files + number of removed files) * (number of new files)
 168# - even more costly is '-C', '--find-copies-harder' with cost
 169#   (number of files in the original tree) * (number of new files)
 170# - one might want to include '-B' option, e.g. '-B', '-M'
 171our @diff_opts = ('-M'); # taken from git_commit
 172
 173# Disables features that would allow repository owners to inject script into
 174# the gitweb domain.
 175our $prevent_xss = 0;
 176
 177# Path to the highlight executable to use (must be the one from
 178# http://www.andre-simon.de due to assumptions about parameters and output).
 179# Useful if highlight is not installed on your webserver's PATH.
 180# [Default: highlight]
 181our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183# information about snapshot formats that gitweb is capable of serving
 184our %known_snapshot_formats = (
 185        # name => {
 186        #       'display' => display name,
 187        #       'type' => mime type,
 188        #       'suffix' => filename suffix,
 189        #       'format' => --format for git-archive,
 190        #       'compressor' => [compressor command and arguments]
 191        #                       (array reference, optional)
 192        #       'disabled' => boolean (optional)}
 193        #
 194        'tgz' => {
 195                'display' => 'tar.gz',
 196                'type' => 'application/x-gzip',
 197                'suffix' => '.tar.gz',
 198                'format' => 'tar',
 199                'compressor' => ['gzip', '-n']},
 200
 201        'tbz2' => {
 202                'display' => 'tar.bz2',
 203                'type' => 'application/x-bzip2',
 204                'suffix' => '.tar.bz2',
 205                'format' => 'tar',
 206                'compressor' => ['bzip2']},
 207
 208        'txz' => {
 209                'display' => 'tar.xz',
 210                'type' => 'application/x-xz',
 211                'suffix' => '.tar.xz',
 212                'format' => 'tar',
 213                'compressor' => ['xz'],
 214                'disabled' => 1},
 215
 216        'zip' => {
 217                'display' => 'zip',
 218                'type' => 'application/x-zip',
 219                'suffix' => '.zip',
 220                'format' => 'zip'},
 221);
 222
 223# Aliases so we understand old gitweb.snapshot values in repository
 224# configuration.
 225our %known_snapshot_format_aliases = (
 226        'gzip'  => 'tgz',
 227        'bzip2' => 'tbz2',
 228        'xz'    => 'txz',
 229
 230        # backward compatibility: legacy gitweb config support
 231        'x-gzip' => undef, 'gz' => undef,
 232        'x-bzip2' => undef, 'bz2' => undef,
 233        'x-zip' => undef, '' => undef,
 234);
 235
 236# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237# are changed, it may be appropriate to change these values too via
 238# $GITWEB_CONFIG.
 239our %avatar_size = (
 240        'default' => 16,
 241        'double'  => 32
 242);
 243
 244# Used to set the maximum load that we will still respond to gitweb queries.
 245# If server load exceed this value then return "503 server busy" error.
 246# If gitweb cannot determined server load, it is taken to be 0.
 247# Leave it undefined (or set to 'undef') to turn off load checking.
 248our $maxload = 300;
 249
 250# configuration for 'highlight' (http://www.andre-simon.de/)
 251# match by basename
 252our %highlight_basename = (
 253        #'Program' => 'py',
 254        #'Library' => 'py',
 255        'SConstruct' => 'py', # SCons equivalent of Makefile
 256        'Makefile' => 'make',
 257);
 258# match by extension
 259our %highlight_ext = (
 260        # main extensions, defining name of syntax;
 261        # see files in /usr/share/highlight/langDefs/ directory
 262        map { $_ => $_ }
 263                qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264        # alternate extensions, see /etc/highlight/filetypes.conf
 265        'h' => 'c',
 266        map { $_ => 'sh'  } qw(bash zsh ksh),
 267        map { $_ => 'cpp' } qw(cxx c++ cc),
 268        map { $_ => 'php' } qw(php3 php4 php5 phps),
 269        map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270        map { $_ => 'make'} qw(mak mk),
 271        map { $_ => 'xml' } qw(xhtml html htm),
 272);
 273
 274# You define site-wide feature defaults here; override them with
 275# $GITWEB_CONFIG as necessary.
 276our %feature = (
 277        # feature => {
 278        #       'sub' => feature-sub (subroutine),
 279        #       'override' => allow-override (boolean),
 280        #       'default' => [ default options...] (array reference)}
 281        #
 282        # if feature is overridable (it means that allow-override has true value),
 283        # then feature-sub will be called with default options as parameters;
 284        # return value of feature-sub indicates if to enable specified feature
 285        #
 286        # if there is no 'sub' key (no feature-sub), then feature cannot be
 287        # overridden
 288        #
 289        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291        # is enabled
 292
 293        # Enable the 'blame' blob view, showing the last commit that modified
 294        # each line in the file. This can be very CPU-intensive.
 295
 296        # To enable system wide have in $GITWEB_CONFIG
 297        # $feature{'blame'}{'default'} = [1];
 298        # To have project specific config enable override in $GITWEB_CONFIG
 299        # $feature{'blame'}{'override'} = 1;
 300        # and in project config gitweb.blame = 0|1;
 301        'blame' => {
 302                'sub' => sub { feature_bool('blame', @_) },
 303                'override' => 0,
 304                'default' => [0]},
 305
 306        # Enable the 'snapshot' link, providing a compressed archive of any
 307        # tree. This can potentially generate high traffic if you have large
 308        # project.
 309
 310        # Value is a list of formats defined in %known_snapshot_formats that
 311        # you wish to offer.
 312        # To disable system wide have in $GITWEB_CONFIG
 313        # $feature{'snapshot'}{'default'} = [];
 314        # To have project specific config enable override in $GITWEB_CONFIG
 315        # $feature{'snapshot'}{'override'} = 1;
 316        # and in project config, a comma-separated list of formats or "none"
 317        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318        'snapshot' => {
 319                'sub' => \&feature_snapshot,
 320                'override' => 0,
 321                'default' => ['tgz']},
 322
 323        # Enable text search, which will list the commits which match author,
 324        # committer or commit text to a given string.  Enabled by default.
 325        # Project specific override is not supported.
 326        #
 327        # Note that this controls all search features, which means that if
 328        # it is disabled, then 'grep' and 'pickaxe' search would also be
 329        # disabled.
 330        'search' => {
 331                'override' => 0,
 332                'default' => [1]},
 333
 334        # Enable grep search, which will list the files in currently selected
 335        # tree containing the given string. Enabled by default. This can be
 336        # potentially CPU-intensive, of course.
 337        # Note that you need to have 'search' feature enabled too.
 338
 339        # To enable system wide have in $GITWEB_CONFIG
 340        # $feature{'grep'}{'default'} = [1];
 341        # To have project specific config enable override in $GITWEB_CONFIG
 342        # $feature{'grep'}{'override'} = 1;
 343        # and in project config gitweb.grep = 0|1;
 344        'grep' => {
 345                'sub' => sub { feature_bool('grep', @_) },
 346                'override' => 0,
 347                'default' => [1]},
 348
 349        # Enable the pickaxe search, which will list the commits that modified
 350        # a given string in a file. This can be practical and quite faster
 351        # alternative to 'blame', but still potentially CPU-intensive.
 352        # Note that you need to have 'search' feature enabled too.
 353
 354        # To enable system wide have in $GITWEB_CONFIG
 355        # $feature{'pickaxe'}{'default'} = [1];
 356        # To have project specific config enable override in $GITWEB_CONFIG
 357        # $feature{'pickaxe'}{'override'} = 1;
 358        # and in project config gitweb.pickaxe = 0|1;
 359        'pickaxe' => {
 360                'sub' => sub { feature_bool('pickaxe', @_) },
 361                'override' => 0,
 362                'default' => [1]},
 363
 364        # Enable showing size of blobs in a 'tree' view, in a separate
 365        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367        # To disable system wide have in $GITWEB_CONFIG
 368        # $feature{'show-sizes'}{'default'} = [0];
 369        # To have project specific config enable override in $GITWEB_CONFIG
 370        # $feature{'show-sizes'}{'override'} = 1;
 371        # and in project config gitweb.showsizes = 0|1;
 372        'show-sizes' => {
 373                'sub' => sub { feature_bool('showsizes', @_) },
 374                'override' => 0,
 375                'default' => [1]},
 376
 377        # Make gitweb use an alternative format of the URLs which can be
 378        # more readable and natural-looking: project name is embedded
 379        # directly in the path and the query string contains other
 380        # auxiliary information. All gitweb installations recognize
 381        # URL in either format; this configures in which formats gitweb
 382        # generates links.
 383
 384        # To enable system wide have in $GITWEB_CONFIG
 385        # $feature{'pathinfo'}{'default'} = [1];
 386        # Project specific override is not supported.
 387
 388        # Note that you will need to change the default location of CSS,
 389        # favicon, logo and possibly other files to an absolute URL. Also,
 390        # if gitweb.cgi serves as your indexfile, you will need to force
 391        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392        'pathinfo' => {
 393                'override' => 0,
 394                'default' => [0]},
 395
 396        # Make gitweb consider projects in project root subdirectories
 397        # to be forks of existing projects. Given project $projname.git,
 398        # projects matching $projname/*.git will not be shown in the main
 399        # projects list, instead a '+' mark will be added to $projname
 400        # there and a 'forks' view will be enabled for the project, listing
 401        # all the forks. If project list is taken from a file, forks have
 402        # to be listed after the main project.
 403
 404        # To enable system wide have in $GITWEB_CONFIG
 405        # $feature{'forks'}{'default'} = [1];
 406        # Project specific override is not supported.
 407        'forks' => {
 408                'override' => 0,
 409                'default' => [0]},
 410
 411        # Insert custom links to the action bar of all project pages.
 412        # This enables you mainly to link to third-party scripts integrating
 413        # into gitweb; e.g. git-browser for graphical history representation
 414        # or custom web-based repository administration interface.
 415
 416        # The 'default' value consists of a list of triplets in the form
 417        # (label, link, position) where position is the label after which
 418        # to insert the link and link is a format string where %n expands
 419        # to the project name, %f to the project path within the filesystem,
 420        # %h to the current hash (h gitweb parameter) and %b to the current
 421        # hash base (hb gitweb parameter); %% expands to %.
 422
 423        # To enable system wide have in $GITWEB_CONFIG e.g.
 424        # $feature{'actions'}{'default'} = [('graphiclog',
 425        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426        # Project specific override is not supported.
 427        'actions' => {
 428                'override' => 0,
 429                'default' => []},
 430
 431        # Allow gitweb scan project content tags of project repository,
 432        # and display the popular Web 2.0-ish "tag cloud" near the projects
 433        # list.  Note that this is something COMPLETELY different from the
 434        # normal Git tags.
 435
 436        # gitweb by itself can show existing tags, but it does not handle
 437        # tagging itself; you need to do it externally, outside gitweb.
 438        # The format is described in git_get_project_ctags() subroutine.
 439        # You may want to install the HTML::TagCloud Perl module to get
 440        # a pretty tag cloud instead of just a list of tags.
 441
 442        # To enable system wide have in $GITWEB_CONFIG
 443        # $feature{'ctags'}{'default'} = [1];
 444        # Project specific override is not supported.
 445
 446        # In the future whether ctags editing is enabled might depend
 447        # on the value, but using 1 should always mean no editing of ctags.
 448        'ctags' => {
 449                'override' => 0,
 450                'default' => [0]},
 451
 452        # The maximum number of patches in a patchset generated in patch
 453        # view. Set this to 0 or undef to disable patch view, or to a
 454        # negative number to remove any limit.
 455
 456        # To disable system wide have in $GITWEB_CONFIG
 457        # $feature{'patches'}{'default'} = [0];
 458        # To have project specific config enable override in $GITWEB_CONFIG
 459        # $feature{'patches'}{'override'} = 1;
 460        # and in project config gitweb.patches = 0|n;
 461        # where n is the maximum number of patches allowed in a patchset.
 462        'patches' => {
 463                'sub' => \&feature_patches,
 464                'override' => 0,
 465                'default' => [16]},
 466
 467        # Avatar support. When this feature is enabled, views such as
 468        # shortlog or commit will display an avatar associated with
 469        # the email of the committer(s) and/or author(s).
 470
 471        # Currently available providers are gravatar and picon.
 472        # If an unknown provider is specified, the feature is disabled.
 473
 474        # Gravatar depends on Digest::MD5.
 475        # Picon currently relies on the indiana.edu database.
 476
 477        # To enable system wide have in $GITWEB_CONFIG
 478        # $feature{'avatar'}{'default'} = ['<provider>'];
 479        # where <provider> is either gravatar or picon.
 480        # To have project specific config enable override in $GITWEB_CONFIG
 481        # $feature{'avatar'}{'override'} = 1;
 482        # and in project config gitweb.avatar = <provider>;
 483        'avatar' => {
 484                'sub' => \&feature_avatar,
 485                'override' => 0,
 486                'default' => ['']},
 487
 488        # Enable displaying how much time and how many git commands
 489        # it took to generate and display page.  Disabled by default.
 490        # Project specific override is not supported.
 491        'timed' => {
 492                'override' => 0,
 493                'default' => [0]},
 494
 495        # Enable turning some links into links to actions which require
 496        # JavaScript to run (like 'blame_incremental').  Not enabled by
 497        # default.  Project specific override is currently not supported.
 498        'javascript-actions' => {
 499                'override' => 0,
 500                'default' => [0]},
 501
 502        # Enable and configure ability to change common timezone for dates
 503        # in gitweb output via JavaScript.  Enabled by default.
 504        # Project specific override is not supported.
 505        'javascript-timezone' => {
 506                'override' => 0,
 507                'default' => [
 508                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                     # or undef to turn off this feature
 510                        'gitweb_tz', # name of cookie where to store selected timezone
 511                        'datetime',  # CSS class used to mark up dates for manipulation
 512                ]},
 513
 514        # Syntax highlighting support. This is based on Daniel Svensson's
 515        # and Sham Chukoury's work in gitweb-xmms2.git.
 516        # It requires the 'highlight' program present in $PATH,
 517        # and therefore is disabled by default.
 518
 519        # To enable system wide have in $GITWEB_CONFIG
 520        # $feature{'highlight'}{'default'} = [1];
 521
 522        'highlight' => {
 523                'sub' => sub { feature_bool('highlight', @_) },
 524                'override' => 0,
 525                'default' => [0]},
 526
 527        # Enable displaying of remote heads in the heads list
 528
 529        # To enable system wide have in $GITWEB_CONFIG
 530        # $feature{'remote_heads'}{'default'} = [1];
 531        # To have project specific config enable override in $GITWEB_CONFIG
 532        # $feature{'remote_heads'}{'override'} = 1;
 533        # and in project config gitweb.remote_heads = 0|1;
 534        'remote_heads' => {
 535                'sub' => sub { feature_bool('remote_heads', @_) },
 536                'override' => 0,
 537                'default' => [0]},
 538);
 539
 540sub gitweb_get_feature {
 541        my ($name) = @_;
 542        return unless exists $feature{$name};
 543        my ($sub, $override, @defaults) = (
 544                $feature{$name}{'sub'},
 545                $feature{$name}{'override'},
 546                @{$feature{$name}{'default'}});
 547        # project specific override is possible only if we have project
 548        our $git_dir; # global variable, declared later
 549        if (!$override || !defined $git_dir) {
 550                return @defaults;
 551        }
 552        if (!defined $sub) {
 553                warn "feature $name is not overridable";
 554                return @defaults;
 555        }
 556        return $sub->(@defaults);
 557}
 558
 559# A wrapper to check if a given feature is enabled.
 560# With this, you can say
 561#
 562#   my $bool_feat = gitweb_check_feature('bool_feat');
 563#   gitweb_check_feature('bool_feat') or somecode;
 564#
 565# instead of
 566#
 567#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569#
 570sub gitweb_check_feature {
 571        return (gitweb_get_feature(@_))[0];
 572}
 573
 574
 575sub feature_bool {
 576        my $key = shift;
 577        my ($val) = git_get_project_config($key, '--bool');
 578
 579        if (!defined $val) {
 580                return ($_[0]);
 581        } elsif ($val eq 'true') {
 582                return (1);
 583        } elsif ($val eq 'false') {
 584                return (0);
 585        }
 586}
 587
 588sub feature_snapshot {
 589        my (@fmts) = @_;
 590
 591        my ($val) = git_get_project_config('snapshot');
 592
 593        if ($val) {
 594                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595        }
 596
 597        return @fmts;
 598}
 599
 600sub feature_patches {
 601        my @val = (git_get_project_config('patches', '--int'));
 602
 603        if (@val) {
 604                return @val;
 605        }
 606
 607        return ($_[0]);
 608}
 609
 610sub feature_avatar {
 611        my @val = (git_get_project_config('avatar'));
 612
 613        return @val ? @val : @_;
 614}
 615
 616# checking HEAD file with -e is fragile if the repository was
 617# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618# and then pruned.
 619sub check_head_link {
 620        my ($dir) = @_;
 621        my $headfile = "$dir/HEAD";
 622        return ((-e $headfile) ||
 623                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624}
 625
 626sub check_export_ok {
 627        my ($dir) = @_;
 628        return (check_head_link($dir) &&
 629                (!$export_ok || -e "$dir/$export_ok") &&
 630                (!$export_auth_hook || $export_auth_hook->($dir)));
 631}
 632
 633# process alternate names for backward compatibility
 634# filter out unsupported (unknown) snapshot formats
 635sub filter_snapshot_fmts {
 636        my @fmts = @_;
 637
 638        @fmts = map {
 639                exists $known_snapshot_format_aliases{$_} ?
 640                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 641        @fmts = grep {
 642                exists $known_snapshot_formats{$_} &&
 643                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644}
 645
 646# If it is set to code reference, it is code that it is to be run once per
 647# request, allowing updating configurations that change with each request,
 648# while running other code in config file only once.
 649#
 650# Otherwise, if it is false then gitweb would process config file only once;
 651# if it is true then gitweb config would be run for each request.
 652our $per_request_config = 1;
 653
 654# read and parse gitweb config file given by its parameter.
 655# returns true on success, false on recoverable error, allowing
 656# to chain this subroutine, using first file that exists.
 657# dies on errors during parsing config file, as it is unrecoverable.
 658sub read_config_file {
 659        my $filename = shift;
 660        return unless defined $filename;
 661        # die if there are errors parsing config file
 662        if (-e $filename) {
 663                do $filename;
 664                die $@ if $@;
 665                return 1;
 666        }
 667        return;
 668}
 669
 670our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671sub evaluate_gitweb_config {
 672        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676        # Protect agains duplications of file names, to not read config twice.
 677        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678        # there possibility of duplication of filename there doesn't matter.
 679        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682        # Common system-wide settings for convenience.
 683        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684        read_config_file($GITWEB_CONFIG_COMMON);
 685
 686        # Use first config file that exists.  This means use the per-instance
 687        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688        read_config_file($GITWEB_CONFIG) and return;
 689        read_config_file($GITWEB_CONFIG_SYSTEM);
 690}
 691
 692# Get loadavg of system, to compare against $maxload.
 693# Currently it requires '/proc/loadavg' present to get loadavg;
 694# if it is not present it returns 0, which means no load checking.
 695sub get_loadavg {
 696        if( -e '/proc/loadavg' ){
 697                open my $fd, '<', '/proc/loadavg'
 698                        or return 0;
 699                my @load = split(/\s+/, scalar <$fd>);
 700                close $fd;
 701
 702                # The first three columns measure CPU and IO utilization of the last one,
 703                # five, and 10 minute periods.  The fourth column shows the number of
 704                # currently running processes and the total number of processes in the m/n
 705                # format.  The last column displays the last process ID used.
 706                return $load[0] || 0;
 707        }
 708        # additional checks for load average should go here for things that don't export
 709        # /proc/loadavg
 710
 711        return 0;
 712}
 713
 714# version of the core git binary
 715our $git_version;
 716sub evaluate_git_version {
 717        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718        $number_of_git_cmds++;
 719}
 720
 721sub check_loadavg {
 722        if (defined $maxload && get_loadavg() > $maxload) {
 723                die_error(503, "The load average on the server is too high");
 724        }
 725}
 726
 727# ======================================================================
 728# input validation and dispatch
 729
 730# input parameters can be collected from a variety of sources (presently, CGI
 731# and PATH_INFO), so we define an %input_params hash that collects them all
 732# together during validation: this allows subsequent uses (e.g. href()) to be
 733# agnostic of the parameter origin
 734
 735our %input_params = ();
 736
 737# input parameters are stored with the long parameter name as key. This will
 738# also be used in the href subroutine to convert parameters to their CGI
 739# equivalent, and since the href() usage is the most frequent one, we store
 740# the name -> CGI key mapping here, instead of the reverse.
 741#
 742# XXX: Warning: If you touch this, check the search form for updating,
 743# too.
 744
 745our @cgi_param_mapping = (
 746        project => "p",
 747        action => "a",
 748        file_name => "f",
 749        file_parent => "fp",
 750        hash => "h",
 751        hash_parent => "hp",
 752        hash_base => "hb",
 753        hash_parent_base => "hpb",
 754        page => "pg",
 755        order => "o",
 756        searchtext => "s",
 757        searchtype => "st",
 758        snapshot_format => "sf",
 759        extra_options => "opt",
 760        search_use_regexp => "sr",
 761        ctag => "by_tag",
 762        diff_style => "ds",
 763        # this must be last entry (for manipulation from JavaScript)
 764        javascript => "js"
 765);
 766our %cgi_param_mapping = @cgi_param_mapping;
 767
 768# we will also need to know the possible actions, for validation
 769our %actions = (
 770        "blame" => \&git_blame,
 771        "blame_incremental" => \&git_blame_incremental,
 772        "blame_data" => \&git_blame_data,
 773        "blobdiff" => \&git_blobdiff,
 774        "blobdiff_plain" => \&git_blobdiff_plain,
 775        "blob" => \&git_blob,
 776        "blob_plain" => \&git_blob_plain,
 777        "commitdiff" => \&git_commitdiff,
 778        "commitdiff_plain" => \&git_commitdiff_plain,
 779        "commit" => \&git_commit,
 780        "forks" => \&git_forks,
 781        "heads" => \&git_heads,
 782        "history" => \&git_history,
 783        "log" => \&git_log,
 784        "patch" => \&git_patch,
 785        "patches" => \&git_patches,
 786        "remotes" => \&git_remotes,
 787        "rss" => \&git_rss,
 788        "atom" => \&git_atom,
 789        "search" => \&git_search,
 790        "search_help" => \&git_search_help,
 791        "shortlog" => \&git_shortlog,
 792        "summary" => \&git_summary,
 793        "tag" => \&git_tag,
 794        "tags" => \&git_tags,
 795        "tree" => \&git_tree,
 796        "snapshot" => \&git_snapshot,
 797        "object" => \&git_object,
 798        # those below don't need $project
 799        "opml" => \&git_opml,
 800        "project_list" => \&git_project_list,
 801        "project_index" => \&git_project_index,
 802);
 803
 804# finally, we have the hash of allowed extra_options for the commands that
 805# allow them
 806our %allowed_options = (
 807        "--no-merges" => [ qw(rss atom log shortlog history) ],
 808);
 809
 810# fill %input_params with the CGI parameters. All values except for 'opt'
 811# should be single values, but opt can be an array. We should probably
 812# build an array of parameters that can be multi-valued, but since for the time
 813# being it's only this one, we just single it out
 814sub evaluate_query_params {
 815        our $cgi;
 816
 817        while (my ($name, $symbol) = each %cgi_param_mapping) {
 818                if ($symbol eq 'opt') {
 819                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 820                } else {
 821                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 822                }
 823        }
 824}
 825
 826# now read PATH_INFO and update the parameter list for missing parameters
 827sub evaluate_path_info {
 828        return if defined $input_params{'project'};
 829        return if !$path_info;
 830        $path_info =~ s,^/+,,;
 831        return if !$path_info;
 832
 833        # find which part of PATH_INFO is project
 834        my $project = $path_info;
 835        $project =~ s,/+$,,;
 836        while ($project && !check_head_link("$projectroot/$project")) {
 837                $project =~ s,/*[^/]*$,,;
 838        }
 839        return unless $project;
 840        $input_params{'project'} = $project;
 841
 842        # do not change any parameters if an action is given using the query string
 843        return if $input_params{'action'};
 844        $path_info =~ s,^\Q$project\E/*,,;
 845
 846        # next, check if we have an action
 847        my $action = $path_info;
 848        $action =~ s,/.*$,,;
 849        if (exists $actions{$action}) {
 850                $path_info =~ s,^$action/*,,;
 851                $input_params{'action'} = $action;
 852        }
 853
 854        # list of actions that want hash_base instead of hash, but can have no
 855        # pathname (f) parameter
 856        my @wants_base = (
 857                'tree',
 858                'history',
 859        );
 860
 861        # we want to catch, among others
 862        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 863        my ($parentrefname, $parentpathname, $refname, $pathname) =
 864                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 865
 866        # first, analyze the 'current' part
 867        if (defined $pathname) {
 868                # we got "branch:filename" or "branch:dir/"
 869                # we could use git_get_type(branch:pathname), but:
 870                # - it needs $git_dir
 871                # - it does a git() call
 872                # - the convention of terminating directories with a slash
 873                #   makes it superfluous
 874                # - embedding the action in the PATH_INFO would make it even
 875                #   more superfluous
 876                $pathname =~ s,^/+,,;
 877                if (!$pathname || substr($pathname, -1) eq "/") {
 878                        $input_params{'action'} ||= "tree";
 879                        $pathname =~ s,/$,,;
 880                } else {
 881                        # the default action depends on whether we had parent info
 882                        # or not
 883                        if ($parentrefname) {
 884                                $input_params{'action'} ||= "blobdiff_plain";
 885                        } else {
 886                                $input_params{'action'} ||= "blob_plain";
 887                        }
 888                }
 889                $input_params{'hash_base'} ||= $refname;
 890                $input_params{'file_name'} ||= $pathname;
 891        } elsif (defined $refname) {
 892                # we got "branch". In this case we have to choose if we have to
 893                # set hash or hash_base.
 894                #
 895                # Most of the actions without a pathname only want hash to be
 896                # set, except for the ones specified in @wants_base that want
 897                # hash_base instead. It should also be noted that hand-crafted
 898                # links having 'history' as an action and no pathname or hash
 899                # set will fail, but that happens regardless of PATH_INFO.
 900                if (defined $parentrefname) {
 901                        # if there is parent let the default be 'shortlog' action
 902                        # (for http://git.example.com/repo.git/A..B links); if there
 903                        # is no parent, dispatch will detect type of object and set
 904                        # action appropriately if required (if action is not set)
 905                        $input_params{'action'} ||= "shortlog";
 906                }
 907                if ($input_params{'action'} &&
 908                    grep { $_ eq $input_params{'action'} } @wants_base) {
 909                        $input_params{'hash_base'} ||= $refname;
 910                } else {
 911                        $input_params{'hash'} ||= $refname;
 912                }
 913        }
 914
 915        # next, handle the 'parent' part, if present
 916        if (defined $parentrefname) {
 917                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 918                # someproject/blobdiff/oldrev..newrev:/filename
 919                if ($parentpathname) {
 920                        $parentpathname =~ s,^/+,,;
 921                        $parentpathname =~ s,/$,,;
 922                        $input_params{'file_parent'} ||= $parentpathname;
 923                } else {
 924                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 925                }
 926                # we assume that hash_parent_base is wanted if a path was specified,
 927                # or if the action wants hash_base instead of hash
 928                if (defined $input_params{'file_parent'} ||
 929                        grep { $_ eq $input_params{'action'} } @wants_base) {
 930                        $input_params{'hash_parent_base'} ||= $parentrefname;
 931                } else {
 932                        $input_params{'hash_parent'} ||= $parentrefname;
 933                }
 934        }
 935
 936        # for the snapshot action, we allow URLs in the form
 937        # $project/snapshot/$hash.ext
 938        # where .ext determines the snapshot and gets removed from the
 939        # passed $refname to provide the $hash.
 940        #
 941        # To be able to tell that $refname includes the format extension, we
 942        # require the following two conditions to be satisfied:
 943        # - the hash input parameter MUST have been set from the $refname part
 944        #   of the URL (i.e. they must be equal)
 945        # - the snapshot format MUST NOT have been defined already (e.g. from
 946        #   CGI parameter sf)
 947        # It's also useless to try any matching unless $refname has a dot,
 948        # so we check for that too
 949        if (defined $input_params{'action'} &&
 950                $input_params{'action'} eq 'snapshot' &&
 951                defined $refname && index($refname, '.') != -1 &&
 952                $refname eq $input_params{'hash'} &&
 953                !defined $input_params{'snapshot_format'}) {
 954                # We loop over the known snapshot formats, checking for
 955                # extensions. Allowed extensions are both the defined suffix
 956                # (which includes the initial dot already) and the snapshot
 957                # format key itself, with a prepended dot
 958                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 959                        my $hash = $refname;
 960                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 961                                next;
 962                        }
 963                        my $sfx = $1;
 964                        # a valid suffix was found, so set the snapshot format
 965                        # and reset the hash parameter
 966                        $input_params{'snapshot_format'} = $fmt;
 967                        $input_params{'hash'} = $hash;
 968                        # we also set the format suffix to the one requested
 969                        # in the URL: this way a request for e.g. .tgz returns
 970                        # a .tgz instead of a .tar.gz
 971                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 972                        last;
 973                }
 974        }
 975}
 976
 977our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 978     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 979     $searchtext, $search_regexp);
 980sub evaluate_and_validate_params {
 981        our $action = $input_params{'action'};
 982        if (defined $action) {
 983                if (!validate_action($action)) {
 984                        die_error(400, "Invalid action parameter");
 985                }
 986        }
 987
 988        # parameters which are pathnames
 989        our $project = $input_params{'project'};
 990        if (defined $project) {
 991                if (!validate_project($project)) {
 992                        undef $project;
 993                        die_error(404, "No such project");
 994                }
 995        }
 996
 997        our $file_name = $input_params{'file_name'};
 998        if (defined $file_name) {
 999                if (!validate_pathname($file_name)) {
1000                        die_error(400, "Invalid file parameter");
1001                }
1002        }
1003
1004        our $file_parent = $input_params{'file_parent'};
1005        if (defined $file_parent) {
1006                if (!validate_pathname($file_parent)) {
1007                        die_error(400, "Invalid file parent parameter");
1008                }
1009        }
1010
1011        # parameters which are refnames
1012        our $hash = $input_params{'hash'};
1013        if (defined $hash) {
1014                if (!validate_refname($hash)) {
1015                        die_error(400, "Invalid hash parameter");
1016                }
1017        }
1018
1019        our $hash_parent = $input_params{'hash_parent'};
1020        if (defined $hash_parent) {
1021                if (!validate_refname($hash_parent)) {
1022                        die_error(400, "Invalid hash parent parameter");
1023                }
1024        }
1025
1026        our $hash_base = $input_params{'hash_base'};
1027        if (defined $hash_base) {
1028                if (!validate_refname($hash_base)) {
1029                        die_error(400, "Invalid hash base parameter");
1030                }
1031        }
1032
1033        our @extra_options = @{$input_params{'extra_options'}};
1034        # @extra_options is always defined, since it can only be (currently) set from
1035        # CGI, and $cgi->param() returns the empty array in array context if the param
1036        # is not set
1037        foreach my $opt (@extra_options) {
1038                if (not exists $allowed_options{$opt}) {
1039                        die_error(400, "Invalid option parameter");
1040                }
1041                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1042                        die_error(400, "Invalid option parameter for this action");
1043                }
1044        }
1045
1046        our $hash_parent_base = $input_params{'hash_parent_base'};
1047        if (defined $hash_parent_base) {
1048                if (!validate_refname($hash_parent_base)) {
1049                        die_error(400, "Invalid hash parent base parameter");
1050                }
1051        }
1052
1053        # other parameters
1054        our $page = $input_params{'page'};
1055        if (defined $page) {
1056                if ($page =~ m/[^0-9]/) {
1057                        die_error(400, "Invalid page parameter");
1058                }
1059        }
1060
1061        our $searchtype = $input_params{'searchtype'};
1062        if (defined $searchtype) {
1063                if ($searchtype =~ m/[^a-z]/) {
1064                        die_error(400, "Invalid searchtype parameter");
1065                }
1066        }
1067
1068        our $search_use_regexp = $input_params{'search_use_regexp'};
1069
1070        our $searchtext = $input_params{'searchtext'};
1071        our $search_regexp;
1072        if (defined $searchtext) {
1073                if (length($searchtext) < 2) {
1074                        die_error(403, "At least two characters are required for search parameter");
1075                }
1076                if ($search_use_regexp) {
1077                        $search_regexp = $searchtext;
1078                        if (!eval { qr/$search_regexp/; 1; }) {
1079                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1080                                die_error(400, "Invalid search regexp '$search_regexp'",
1081                                          esc_html($error));
1082                        }
1083                } else {
1084                        $search_regexp = quotemeta $searchtext;
1085                }
1086        }
1087}
1088
1089# path to the current git repository
1090our $git_dir;
1091sub evaluate_git_dir {
1092        our $git_dir = "$projectroot/$project" if $project;
1093}
1094
1095our (@snapshot_fmts, $git_avatar);
1096sub configure_gitweb_features {
1097        # list of supported snapshot formats
1098        our @snapshot_fmts = gitweb_get_feature('snapshot');
1099        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1100
1101        # check that the avatar feature is set to a known provider name,
1102        # and for each provider check if the dependencies are satisfied.
1103        # if the provider name is invalid or the dependencies are not met,
1104        # reset $git_avatar to the empty string.
1105        our ($git_avatar) = gitweb_get_feature('avatar');
1106        if ($git_avatar eq 'gravatar') {
1107                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1108        } elsif ($git_avatar eq 'picon') {
1109                # no dependencies
1110        } else {
1111                $git_avatar = '';
1112        }
1113}
1114
1115# custom error handler: 'die <message>' is Internal Server Error
1116sub handle_errors_html {
1117        my $msg = shift; # it is already HTML escaped
1118
1119        # to avoid infinite loop where error occurs in die_error,
1120        # change handler to default handler, disabling handle_errors_html
1121        set_message("Error occured when inside die_error:\n$msg");
1122
1123        # you cannot jump out of die_error when called as error handler;
1124        # the subroutine set via CGI::Carp::set_message is called _after_
1125        # HTTP headers are already written, so it cannot write them itself
1126        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1127}
1128set_message(\&handle_errors_html);
1129
1130# dispatch
1131sub dispatch {
1132        if (!defined $action) {
1133                if (defined $hash) {
1134                        $action = git_get_type($hash);
1135                } elsif (defined $hash_base && defined $file_name) {
1136                        $action = git_get_type("$hash_base:$file_name");
1137                } elsif (defined $project) {
1138                        $action = 'summary';
1139                } else {
1140                        $action = 'project_list';
1141                }
1142        }
1143        if (!defined($actions{$action})) {
1144                die_error(400, "Unknown action");
1145        }
1146        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1147            !$project) {
1148                die_error(400, "Project needed");
1149        }
1150        $actions{$action}->();
1151}
1152
1153sub reset_timer {
1154        our $t0 = [ gettimeofday() ]
1155                if defined $t0;
1156        our $number_of_git_cmds = 0;
1157}
1158
1159our $first_request = 1;
1160sub run_request {
1161        reset_timer();
1162
1163        evaluate_uri();
1164        if ($first_request) {
1165                evaluate_gitweb_config();
1166                evaluate_git_version();
1167        }
1168        if ($per_request_config) {
1169                if (ref($per_request_config) eq 'CODE') {
1170                        $per_request_config->();
1171                } elsif (!$first_request) {
1172                        evaluate_gitweb_config();
1173                }
1174        }
1175        check_loadavg();
1176
1177        # $projectroot and $projects_list might be set in gitweb config file
1178        $projects_list ||= $projectroot;
1179
1180        evaluate_query_params();
1181        evaluate_path_info();
1182        evaluate_and_validate_params();
1183        evaluate_git_dir();
1184
1185        configure_gitweb_features();
1186
1187        dispatch();
1188}
1189
1190our $is_last_request = sub { 1 };
1191our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1192our $CGI = 'CGI';
1193our $cgi;
1194sub configure_as_fcgi {
1195        require CGI::Fast;
1196        our $CGI = 'CGI::Fast';
1197
1198        my $request_number = 0;
1199        # let each child service 100 requests
1200        our $is_last_request = sub { ++$request_number > 100 };
1201}
1202sub evaluate_argv {
1203        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1204        configure_as_fcgi()
1205                if $script_name =~ /\.fcgi$/;
1206
1207        return unless (@ARGV);
1208
1209        require Getopt::Long;
1210        Getopt::Long::GetOptions(
1211                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1212                'nproc|n=i' => sub {
1213                        my ($arg, $val) = @_;
1214                        return unless eval { require FCGI::ProcManager; 1; };
1215                        my $proc_manager = FCGI::ProcManager->new({
1216                                n_processes => $val,
1217                        });
1218                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1219                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1220                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1221                },
1222        );
1223}
1224
1225sub run {
1226        evaluate_argv();
1227
1228        $first_request = 1;
1229        $pre_listen_hook->()
1230                if $pre_listen_hook;
1231
1232 REQUEST:
1233        while ($cgi = $CGI->new()) {
1234                $pre_dispatch_hook->()
1235                        if $pre_dispatch_hook;
1236
1237                run_request();
1238
1239                $post_dispatch_hook->()
1240                        if $post_dispatch_hook;
1241                $first_request = 0;
1242
1243                last REQUEST if ($is_last_request->());
1244        }
1245
1246 DONE_GITWEB:
1247        1;
1248}
1249
1250run();
1251
1252if (defined caller) {
1253        # wrapped in a subroutine processing requests,
1254        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1255        return;
1256} else {
1257        # pure CGI script, serving single request
1258        exit;
1259}
1260
1261## ======================================================================
1262## action links
1263
1264# possible values of extra options
1265# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1266# -replay => 1      - start from a current view (replay with modifications)
1267# -path_info => 0|1 - don't use/use path_info URL (if possible)
1268# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1269sub href {
1270        my %params = @_;
1271        # default is to use -absolute url() i.e. $my_uri
1272        my $href = $params{-full} ? $my_url : $my_uri;
1273
1274        # implicit -replay, must be first of implicit params
1275        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1276
1277        $params{'project'} = $project unless exists $params{'project'};
1278
1279        if ($params{-replay}) {
1280                while (my ($name, $symbol) = each %cgi_param_mapping) {
1281                        if (!exists $params{$name}) {
1282                                $params{$name} = $input_params{$name};
1283                        }
1284                }
1285        }
1286
1287        my $use_pathinfo = gitweb_check_feature('pathinfo');
1288        if (defined $params{'project'} &&
1289            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1290                # try to put as many parameters as possible in PATH_INFO:
1291                #   - project name
1292                #   - action
1293                #   - hash_parent or hash_parent_base:/file_parent
1294                #   - hash or hash_base:/filename
1295                #   - the snapshot_format as an appropriate suffix
1296
1297                # When the script is the root DirectoryIndex for the domain,
1298                # $href here would be something like http://gitweb.example.com/
1299                # Thus, we strip any trailing / from $href, to spare us double
1300                # slashes in the final URL
1301                $href =~ s,/$,,;
1302
1303                # Then add the project name, if present
1304                $href .= "/".esc_path_info($params{'project'});
1305                delete $params{'project'};
1306
1307                # since we destructively absorb parameters, we keep this
1308                # boolean that remembers if we're handling a snapshot
1309                my $is_snapshot = $params{'action'} eq 'snapshot';
1310
1311                # Summary just uses the project path URL, any other action is
1312                # added to the URL
1313                if (defined $params{'action'}) {
1314                        $href .= "/".esc_path_info($params{'action'})
1315                                unless $params{'action'} eq 'summary';
1316                        delete $params{'action'};
1317                }
1318
1319                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1320                # stripping nonexistent or useless pieces
1321                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1322                        || $params{'hash_parent'} || $params{'hash'});
1323                if (defined $params{'hash_base'}) {
1324                        if (defined $params{'hash_parent_base'}) {
1325                                $href .= esc_path_info($params{'hash_parent_base'});
1326                                # skip the file_parent if it's the same as the file_name
1327                                if (defined $params{'file_parent'}) {
1328                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1329                                                delete $params{'file_parent'};
1330                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1331                                                $href .= ":/".esc_path_info($params{'file_parent'});
1332                                                delete $params{'file_parent'};
1333                                        }
1334                                }
1335                                $href .= "..";
1336                                delete $params{'hash_parent'};
1337                                delete $params{'hash_parent_base'};
1338                        } elsif (defined $params{'hash_parent'}) {
1339                                $href .= esc_path_info($params{'hash_parent'}). "..";
1340                                delete $params{'hash_parent'};
1341                        }
1342
1343                        $href .= esc_path_info($params{'hash_base'});
1344                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1345                                $href .= ":/".esc_path_info($params{'file_name'});
1346                                delete $params{'file_name'};
1347                        }
1348                        delete $params{'hash'};
1349                        delete $params{'hash_base'};
1350                } elsif (defined $params{'hash'}) {
1351                        $href .= esc_path_info($params{'hash'});
1352                        delete $params{'hash'};
1353                }
1354
1355                # If the action was a snapshot, we can absorb the
1356                # snapshot_format parameter too
1357                if ($is_snapshot) {
1358                        my $fmt = $params{'snapshot_format'};
1359                        # snapshot_format should always be defined when href()
1360                        # is called, but just in case some code forgets, we
1361                        # fall back to the default
1362                        $fmt ||= $snapshot_fmts[0];
1363                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1364                        delete $params{'snapshot_format'};
1365                }
1366        }
1367
1368        # now encode the parameters explicitly
1369        my @result = ();
1370        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1371                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1372                if (defined $params{$name}) {
1373                        if (ref($params{$name}) eq "ARRAY") {
1374                                foreach my $par (@{$params{$name}}) {
1375                                        push @result, $symbol . "=" . esc_param($par);
1376                                }
1377                        } else {
1378                                push @result, $symbol . "=" . esc_param($params{$name});
1379                        }
1380                }
1381        }
1382        $href .= "?" . join(';', @result) if scalar @result;
1383
1384        # final transformation: trailing spaces must be escaped (URI-encoded)
1385        $href =~ s/(\s+)$/CGI::escape($1)/e;
1386
1387        if ($params{-anchor}) {
1388                $href .= "#".esc_param($params{-anchor});
1389        }
1390
1391        return $href;
1392}
1393
1394
1395## ======================================================================
1396## validation, quoting/unquoting and escaping
1397
1398sub validate_action {
1399        my $input = shift || return undef;
1400        return undef unless exists $actions{$input};
1401        return $input;
1402}
1403
1404sub validate_project {
1405        my $input = shift || return undef;
1406        if (!validate_pathname($input) ||
1407                !(-d "$projectroot/$input") ||
1408                !check_export_ok("$projectroot/$input") ||
1409                ($strict_export && !project_in_list($input))) {
1410                return undef;
1411        } else {
1412                return $input;
1413        }
1414}
1415
1416sub validate_pathname {
1417        my $input = shift || return undef;
1418
1419        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1420        # at the beginning, at the end, and between slashes.
1421        # also this catches doubled slashes
1422        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1423                return undef;
1424        }
1425        # no null characters
1426        if ($input =~ m!\0!) {
1427                return undef;
1428        }
1429        return $input;
1430}
1431
1432sub validate_refname {
1433        my $input = shift || return undef;
1434
1435        # textual hashes are O.K.
1436        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1437                return $input;
1438        }
1439        # it must be correct pathname
1440        $input = validate_pathname($input)
1441                or return undef;
1442        # restrictions on ref name according to git-check-ref-format
1443        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1444                return undef;
1445        }
1446        return $input;
1447}
1448
1449# decode sequences of octets in utf8 into Perl's internal form,
1450# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1451# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1452sub to_utf8 {
1453        my $str = shift;
1454        return undef unless defined $str;
1455
1456        if (utf8::is_utf8($str) || utf8::decode($str)) {
1457                return $str;
1458        } else {
1459                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1460        }
1461}
1462
1463# quote unsafe chars, but keep the slash, even when it's not
1464# correct, but quoted slashes look too horrible in bookmarks
1465sub esc_param {
1466        my $str = shift;
1467        return undef unless defined $str;
1468        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1469        $str =~ s/ /\+/g;
1470        return $str;
1471}
1472
1473# the quoting rules for path_info fragment are slightly different
1474sub esc_path_info {
1475        my $str = shift;
1476        return undef unless defined $str;
1477
1478        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1479        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1480
1481        return $str;
1482}
1483
1484# quote unsafe chars in whole URL, so some characters cannot be quoted
1485sub esc_url {
1486        my $str = shift;
1487        return undef unless defined $str;
1488        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1489        $str =~ s/ /\+/g;
1490        return $str;
1491}
1492
1493# quote unsafe characters in HTML attributes
1494sub esc_attr {
1495
1496        # for XHTML conformance escaping '"' to '&quot;' is not enough
1497        return esc_html(@_);
1498}
1499
1500# replace invalid utf8 character with SUBSTITUTION sequence
1501sub esc_html {
1502        my $str = shift;
1503        my %opts = @_;
1504
1505        return undef unless defined $str;
1506
1507        $str = to_utf8($str);
1508        $str = $cgi->escapeHTML($str);
1509        if ($opts{'-nbsp'}) {
1510                $str =~ s/ /&nbsp;/g;
1511        }
1512        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1513        return $str;
1514}
1515
1516# quote control characters and escape filename to HTML
1517sub esc_path {
1518        my $str = shift;
1519        my %opts = @_;
1520
1521        return undef unless defined $str;
1522
1523        $str = to_utf8($str);
1524        $str = $cgi->escapeHTML($str);
1525        if ($opts{'-nbsp'}) {
1526                $str =~ s/ /&nbsp;/g;
1527        }
1528        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1529        return $str;
1530}
1531
1532# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1533sub sanitize {
1534        my $str = shift;
1535
1536        return undef unless defined $str;
1537
1538        $str = to_utf8($str);
1539        $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1540        return $str;
1541}
1542
1543# Make control characters "printable", using character escape codes (CEC)
1544sub quot_cec {
1545        my $cntrl = shift;
1546        my %opts = @_;
1547        my %es = ( # character escape codes, aka escape sequences
1548                "\t" => '\t',   # tab            (HT)
1549                "\n" => '\n',   # line feed      (LF)
1550                "\r" => '\r',   # carrige return (CR)
1551                "\f" => '\f',   # form feed      (FF)
1552                "\b" => '\b',   # backspace      (BS)
1553                "\a" => '\a',   # alarm (bell)   (BEL)
1554                "\e" => '\e',   # escape         (ESC)
1555                "\013" => '\v', # vertical tab   (VT)
1556                "\000" => '\0', # nul character  (NUL)
1557        );
1558        my $chr = ( (exists $es{$cntrl})
1559                    ? $es{$cntrl}
1560                    : sprintf('\%2x', ord($cntrl)) );
1561        if ($opts{-nohtml}) {
1562                return $chr;
1563        } else {
1564                return "<span class=\"cntrl\">$chr</span>";
1565        }
1566}
1567
1568# Alternatively use unicode control pictures codepoints,
1569# Unicode "printable representation" (PR)
1570sub quot_upr {
1571        my $cntrl = shift;
1572        my %opts = @_;
1573
1574        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1575        if ($opts{-nohtml}) {
1576                return $chr;
1577        } else {
1578                return "<span class=\"cntrl\">$chr</span>";
1579        }
1580}
1581
1582# git may return quoted and escaped filenames
1583sub unquote {
1584        my $str = shift;
1585
1586        sub unq {
1587                my $seq = shift;
1588                my %es = ( # character escape codes, aka escape sequences
1589                        't' => "\t",   # tab            (HT, TAB)
1590                        'n' => "\n",   # newline        (NL)
1591                        'r' => "\r",   # return         (CR)
1592                        'f' => "\f",   # form feed      (FF)
1593                        'b' => "\b",   # backspace      (BS)
1594                        'a' => "\a",   # alarm (bell)   (BEL)
1595                        'e' => "\e",   # escape         (ESC)
1596                        'v' => "\013", # vertical tab   (VT)
1597                );
1598
1599                if ($seq =~ m/^[0-7]{1,3}$/) {
1600                        # octal char sequence
1601                        return chr(oct($seq));
1602                } elsif (exists $es{$seq}) {
1603                        # C escape sequence, aka character escape code
1604                        return $es{$seq};
1605                }
1606                # quoted ordinary character
1607                return $seq;
1608        }
1609
1610        if ($str =~ m/^"(.*)"$/) {
1611                # needs unquoting
1612                $str = $1;
1613                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1614        }
1615        return $str;
1616}
1617
1618# escape tabs (convert tabs to spaces)
1619sub untabify {
1620        my $line = shift;
1621
1622        while ((my $pos = index($line, "\t")) != -1) {
1623                if (my $count = (8 - ($pos % 8))) {
1624                        my $spaces = ' ' x $count;
1625                        $line =~ s/\t/$spaces/;
1626                }
1627        }
1628
1629        return $line;
1630}
1631
1632sub project_in_list {
1633        my $project = shift;
1634        my @list = git_get_projects_list();
1635        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1636}
1637
1638## ----------------------------------------------------------------------
1639## HTML aware string manipulation
1640
1641# Try to chop given string on a word boundary between position
1642# $len and $len+$add_len. If there is no word boundary there,
1643# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1644# (marking chopped part) would be longer than given string.
1645sub chop_str {
1646        my $str = shift;
1647        my $len = shift;
1648        my $add_len = shift || 10;
1649        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1650
1651        # Make sure perl knows it is utf8 encoded so we don't
1652        # cut in the middle of a utf8 multibyte char.
1653        $str = to_utf8($str);
1654
1655        # allow only $len chars, but don't cut a word if it would fit in $add_len
1656        # if it doesn't fit, cut it if it's still longer than the dots we would add
1657        # remove chopped character entities entirely
1658
1659        # when chopping in the middle, distribute $len into left and right part
1660        # return early if chopping wouldn't make string shorter
1661        if ($where eq 'center') {
1662                return $str if ($len + 5 >= length($str)); # filler is length 5
1663                $len = int($len/2);
1664        } else {
1665                return $str if ($len + 4 >= length($str)); # filler is length 4
1666        }
1667
1668        # regexps: ending and beginning with word part up to $add_len
1669        my $endre = qr/.{$len}\w{0,$add_len}/;
1670        my $begre = qr/\w{0,$add_len}.{$len}/;
1671
1672        if ($where eq 'left') {
1673                $str =~ m/^(.*?)($begre)$/;
1674                my ($lead, $body) = ($1, $2);
1675                if (length($lead) > 4) {
1676                        $lead = " ...";
1677                }
1678                return "$lead$body";
1679
1680        } elsif ($where eq 'center') {
1681                $str =~ m/^($endre)(.*)$/;
1682                my ($left, $str)  = ($1, $2);
1683                $str =~ m/^(.*?)($begre)$/;
1684                my ($mid, $right) = ($1, $2);
1685                if (length($mid) > 5) {
1686                        $mid = " ... ";
1687                }
1688                return "$left$mid$right";
1689
1690        } else {
1691                $str =~ m/^($endre)(.*)$/;
1692                my $body = $1;
1693                my $tail = $2;
1694                if (length($tail) > 4) {
1695                        $tail = "... ";
1696                }
1697                return "$body$tail";
1698        }
1699}
1700
1701# takes the same arguments as chop_str, but also wraps a <span> around the
1702# result with a title attribute if it does get chopped. Additionally, the
1703# string is HTML-escaped.
1704sub chop_and_escape_str {
1705        my ($str) = @_;
1706
1707        my $chopped = chop_str(@_);
1708        $str = to_utf8($str);
1709        if ($chopped eq $str) {
1710                return esc_html($chopped);
1711        } else {
1712                $str =~ s/[[:cntrl:]]/?/g;
1713                return $cgi->span({-title=>$str}, esc_html($chopped));
1714        }
1715}
1716
1717## ----------------------------------------------------------------------
1718## functions returning short strings
1719
1720# CSS class for given age value (in seconds)
1721sub age_class {
1722        my $age = shift;
1723
1724        if (!defined $age) {
1725                return "noage";
1726        } elsif ($age < 60*60*2) {
1727                return "age0";
1728        } elsif ($age < 60*60*24*2) {
1729                return "age1";
1730        } else {
1731                return "age2";
1732        }
1733}
1734
1735# convert age in seconds to "nn units ago" string
1736sub age_string {
1737        my $age = shift;
1738        my $age_str;
1739
1740        if ($age > 60*60*24*365*2) {
1741                $age_str = (int $age/60/60/24/365);
1742                $age_str .= " years ago";
1743        } elsif ($age > 60*60*24*(365/12)*2) {
1744                $age_str = int $age/60/60/24/(365/12);
1745                $age_str .= " months ago";
1746        } elsif ($age > 60*60*24*7*2) {
1747                $age_str = int $age/60/60/24/7;
1748                $age_str .= " weeks ago";
1749        } elsif ($age > 60*60*24*2) {
1750                $age_str = int $age/60/60/24;
1751                $age_str .= " days ago";
1752        } elsif ($age > 60*60*2) {
1753                $age_str = int $age/60/60;
1754                $age_str .= " hours ago";
1755        } elsif ($age > 60*2) {
1756                $age_str = int $age/60;
1757                $age_str .= " min ago";
1758        } elsif ($age > 2) {
1759                $age_str = int $age;
1760                $age_str .= " sec ago";
1761        } else {
1762                $age_str .= " right now";
1763        }
1764        return $age_str;
1765}
1766
1767use constant {
1768        S_IFINVALID => 0030000,
1769        S_IFGITLINK => 0160000,
1770};
1771
1772# submodule/subproject, a commit object reference
1773sub S_ISGITLINK {
1774        my $mode = shift;
1775
1776        return (($mode & S_IFMT) == S_IFGITLINK)
1777}
1778
1779# convert file mode in octal to symbolic file mode string
1780sub mode_str {
1781        my $mode = oct shift;
1782
1783        if (S_ISGITLINK($mode)) {
1784                return 'm---------';
1785        } elsif (S_ISDIR($mode & S_IFMT)) {
1786                return 'drwxr-xr-x';
1787        } elsif (S_ISLNK($mode)) {
1788                return 'lrwxrwxrwx';
1789        } elsif (S_ISREG($mode)) {
1790                # git cares only about the executable bit
1791                if ($mode & S_IXUSR) {
1792                        return '-rwxr-xr-x';
1793                } else {
1794                        return '-rw-r--r--';
1795                };
1796        } else {
1797                return '----------';
1798        }
1799}
1800
1801# convert file mode in octal to file type string
1802sub file_type {
1803        my $mode = shift;
1804
1805        if ($mode !~ m/^[0-7]+$/) {
1806                return $mode;
1807        } else {
1808                $mode = oct $mode;
1809        }
1810
1811        if (S_ISGITLINK($mode)) {
1812                return "submodule";
1813        } elsif (S_ISDIR($mode & S_IFMT)) {
1814                return "directory";
1815        } elsif (S_ISLNK($mode)) {
1816                return "symlink";
1817        } elsif (S_ISREG($mode)) {
1818                return "file";
1819        } else {
1820                return "unknown";
1821        }
1822}
1823
1824# convert file mode in octal to file type description string
1825sub file_type_long {
1826        my $mode = shift;
1827
1828        if ($mode !~ m/^[0-7]+$/) {
1829                return $mode;
1830        } else {
1831                $mode = oct $mode;
1832        }
1833
1834        if (S_ISGITLINK($mode)) {
1835                return "submodule";
1836        } elsif (S_ISDIR($mode & S_IFMT)) {
1837                return "directory";
1838        } elsif (S_ISLNK($mode)) {
1839                return "symlink";
1840        } elsif (S_ISREG($mode)) {
1841                if ($mode & S_IXUSR) {
1842                        return "executable";
1843                } else {
1844                        return "file";
1845                };
1846        } else {
1847                return "unknown";
1848        }
1849}
1850
1851
1852## ----------------------------------------------------------------------
1853## functions returning short HTML fragments, or transforming HTML fragments
1854## which don't belong to other sections
1855
1856# format line of commit message.
1857sub format_log_line_html {
1858        my $line = shift;
1859
1860        $line = esc_html($line, -nbsp=>1);
1861        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1862                $cgi->a({-href => href(action=>"object", hash=>$1),
1863                                        -class => "text"}, $1);
1864        }eg;
1865
1866        return $line;
1867}
1868
1869# format marker of refs pointing to given object
1870
1871# the destination action is chosen based on object type and current context:
1872# - for annotated tags, we choose the tag view unless it's the current view
1873#   already, in which case we go to shortlog view
1874# - for other refs, we keep the current view if we're in history, shortlog or
1875#   log view, and select shortlog otherwise
1876sub format_ref_marker {
1877        my ($refs, $id) = @_;
1878        my $markers = '';
1879
1880        if (defined $refs->{$id}) {
1881                foreach my $ref (@{$refs->{$id}}) {
1882                        # this code exploits the fact that non-lightweight tags are the
1883                        # only indirect objects, and that they are the only objects for which
1884                        # we want to use tag instead of shortlog as action
1885                        my ($type, $name) = qw();
1886                        my $indirect = ($ref =~ s/\^\{\}$//);
1887                        # e.g. tags/v2.6.11 or heads/next
1888                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
1889                                $type = $1;
1890                                $name = $2;
1891                        } else {
1892                                $type = "ref";
1893                                $name = $ref;
1894                        }
1895
1896                        my $class = $type;
1897                        $class .= " indirect" if $indirect;
1898
1899                        my $dest_action = "shortlog";
1900
1901                        if ($indirect) {
1902                                $dest_action = "tag" unless $action eq "tag";
1903                        } elsif ($action =~ /^(history|(short)?log)$/) {
1904                                $dest_action = $action;
1905                        }
1906
1907                        my $dest = "";
1908                        $dest .= "refs/" unless $ref =~ m!^refs/!;
1909                        $dest .= $ref;
1910
1911                        my $link = $cgi->a({
1912                                -href => href(
1913                                        action=>$dest_action,
1914                                        hash=>$dest
1915                                )}, $name);
1916
1917                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1918                                $link . "</span>";
1919                }
1920        }
1921
1922        if ($markers) {
1923                return ' <span class="refs">'. $markers . '</span>';
1924        } else {
1925                return "";
1926        }
1927}
1928
1929# format, perhaps shortened and with markers, title line
1930sub format_subject_html {
1931        my ($long, $short, $href, $extra) = @_;
1932        $extra = '' unless defined($extra);
1933
1934        if (length($short) < length($long)) {
1935                $long =~ s/[[:cntrl:]]/?/g;
1936                return $cgi->a({-href => $href, -class => "list subject",
1937                                -title => to_utf8($long)},
1938                       esc_html($short)) . $extra;
1939        } else {
1940                return $cgi->a({-href => $href, -class => "list subject"},
1941                       esc_html($long)) . $extra;
1942        }
1943}
1944
1945# Rather than recomputing the url for an email multiple times, we cache it
1946# after the first hit. This gives a visible benefit in views where the avatar
1947# for the same email is used repeatedly (e.g. shortlog).
1948# The cache is shared by all avatar engines (currently gravatar only), which
1949# are free to use it as preferred. Since only one avatar engine is used for any
1950# given page, there's no risk for cache conflicts.
1951our %avatar_cache = ();
1952
1953# Compute the picon url for a given email, by using the picon search service over at
1954# http://www.cs.indiana.edu/picons/search.html
1955sub picon_url {
1956        my $email = lc shift;
1957        if (!$avatar_cache{$email}) {
1958                my ($user, $domain) = split('@', $email);
1959                $avatar_cache{$email} =
1960                        "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1961                        "$domain/$user/" .
1962                        "users+domains+unknown/up/single";
1963        }
1964        return $avatar_cache{$email};
1965}
1966
1967# Compute the gravatar url for a given email, if it's not in the cache already.
1968# Gravatar stores only the part of the URL before the size, since that's the
1969# one computationally more expensive. This also allows reuse of the cache for
1970# different sizes (for this particular engine).
1971sub gravatar_url {
1972        my $email = lc shift;
1973        my $size = shift;
1974        $avatar_cache{$email} ||=
1975                "http://www.gravatar.com/avatar/" .
1976                        Digest::MD5::md5_hex($email) . "?s=";
1977        return $avatar_cache{$email} . $size;
1978}
1979
1980# Insert an avatar for the given $email at the given $size if the feature
1981# is enabled.
1982sub git_get_avatar {
1983        my ($email, %opts) = @_;
1984        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1985        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1986        $opts{-size} ||= 'default';
1987        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1988        my $url = "";
1989        if ($git_avatar eq 'gravatar') {
1990                $url = gravatar_url($email, $size);
1991        } elsif ($git_avatar eq 'picon') {
1992                $url = picon_url($email);
1993        }
1994        # Other providers can be added by extending the if chain, defining $url
1995        # as needed. If no variant puts something in $url, we assume avatars
1996        # are completely disabled/unavailable.
1997        if ($url) {
1998                return $pre_white .
1999                       "<img width=\"$size\" " .
2000                            "class=\"avatar\" " .
2001                            "src=\"".esc_url($url)."\" " .
2002                            "alt=\"\" " .
2003                       "/>" . $post_white;
2004        } else {
2005                return "";
2006        }
2007}
2008
2009sub format_search_author {
2010        my ($author, $searchtype, $displaytext) = @_;
2011        my $have_search = gitweb_check_feature('search');
2012
2013        if ($have_search) {
2014                my $performed = "";
2015                if ($searchtype eq 'author') {
2016                        $performed = "authored";
2017                } elsif ($searchtype eq 'committer') {
2018                        $performed = "committed";
2019                }
2020
2021                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2022                                searchtext=>$author,
2023                                searchtype=>$searchtype), class=>"list",
2024                                title=>"Search for commits $performed by $author"},
2025                                $displaytext);
2026
2027        } else {
2028                return $displaytext;
2029        }
2030}
2031
2032# format the author name of the given commit with the given tag
2033# the author name is chopped and escaped according to the other
2034# optional parameters (see chop_str).
2035sub format_author_html {
2036        my $tag = shift;
2037        my $co = shift;
2038        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2039        return "<$tag class=\"author\">" .
2040               format_search_author($co->{'author_name'}, "author",
2041                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2042                       $author) .
2043               "</$tag>";
2044}
2045
2046# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2047sub format_git_diff_header_line {
2048        my $line = shift;
2049        my $diffinfo = shift;
2050        my ($from, $to) = @_;
2051
2052        if ($diffinfo->{'nparents'}) {
2053                # combined diff
2054                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2055                if ($to->{'href'}) {
2056                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2057                                         esc_path($to->{'file'}));
2058                } else { # file was deleted (no href)
2059                        $line .= esc_path($to->{'file'});
2060                }
2061        } else {
2062                # "ordinary" diff
2063                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2064                if ($from->{'href'}) {
2065                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2066                                         'a/' . esc_path($from->{'file'}));
2067                } else { # file was added (no href)
2068                        $line .= 'a/' . esc_path($from->{'file'});
2069                }
2070                $line .= ' ';
2071                if ($to->{'href'}) {
2072                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2073                                         'b/' . esc_path($to->{'file'}));
2074                } else { # file was deleted
2075                        $line .= 'b/' . esc_path($to->{'file'});
2076                }
2077        }
2078
2079        return "<div class=\"diff header\">$line</div>\n";
2080}
2081
2082# format extended diff header line, before patch itself
2083sub format_extended_diff_header_line {
2084        my $line = shift;
2085        my $diffinfo = shift;
2086        my ($from, $to) = @_;
2087
2088        # match <path>
2089        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2090                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2091                                       esc_path($from->{'file'}));
2092        }
2093        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2094                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2095                                 esc_path($to->{'file'}));
2096        }
2097        # match single <mode>
2098        if ($line =~ m/\s(\d{6})$/) {
2099                $line .= '<span class="info"> (' .
2100                         file_type_long($1) .
2101                         ')</span>';
2102        }
2103        # match <hash>
2104        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2105                # can match only for combined diff
2106                $line = 'index ';
2107                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2108                        if ($from->{'href'}[$i]) {
2109                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2110                                                  -class=>"hash"},
2111                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2112                        } else {
2113                                $line .= '0' x 7;
2114                        }
2115                        # separator
2116                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2117                }
2118                $line .= '..';
2119                if ($to->{'href'}) {
2120                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2121                                         substr($diffinfo->{'to_id'},0,7));
2122                } else {
2123                        $line .= '0' x 7;
2124                }
2125
2126        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2127                # can match only for ordinary diff
2128                my ($from_link, $to_link);
2129                if ($from->{'href'}) {
2130                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2131                                             substr($diffinfo->{'from_id'},0,7));
2132                } else {
2133                        $from_link = '0' x 7;
2134                }
2135                if ($to->{'href'}) {
2136                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2137                                           substr($diffinfo->{'to_id'},0,7));
2138                } else {
2139                        $to_link = '0' x 7;
2140                }
2141                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2142                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2143        }
2144
2145        return $line . "<br/>\n";
2146}
2147
2148# format from-file/to-file diff header
2149sub format_diff_from_to_header {
2150        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2151        my $line;
2152        my $result = '';
2153
2154        $line = $from_line;
2155        #assert($line =~ m/^---/) if DEBUG;
2156        # no extra formatting for "^--- /dev/null"
2157        if (! $diffinfo->{'nparents'}) {
2158                # ordinary (single parent) diff
2159                if ($line =~ m!^--- "?a/!) {
2160                        if ($from->{'href'}) {
2161                                $line = '--- a/' .
2162                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2163                                                esc_path($from->{'file'}));
2164                        } else {
2165                                $line = '--- a/' .
2166                                        esc_path($from->{'file'});
2167                        }
2168                }
2169                $result .= qq!<div class="diff from_file">$line</div>\n!;
2170
2171        } else {
2172                # combined diff (merge commit)
2173                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2174                        if ($from->{'href'}[$i]) {
2175                                $line = '--- ' .
2176                                        $cgi->a({-href=>href(action=>"blobdiff",
2177                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2178                                                             hash_parent_base=>$parents[$i],
2179                                                             file_parent=>$from->{'file'}[$i],
2180                                                             hash=>$diffinfo->{'to_id'},
2181                                                             hash_base=>$hash,
2182                                                             file_name=>$to->{'file'}),
2183                                                 -class=>"path",
2184                                                 -title=>"diff" . ($i+1)},
2185                                                $i+1) .
2186                                        '/' .
2187                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2188                                                esc_path($from->{'file'}[$i]));
2189                        } else {
2190                                $line = '--- /dev/null';
2191                        }
2192                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2193                }
2194        }
2195
2196        $line = $to_line;
2197        #assert($line =~ m/^\+\+\+/) if DEBUG;
2198        # no extra formatting for "^+++ /dev/null"
2199        if ($line =~ m!^\+\+\+ "?b/!) {
2200                if ($to->{'href'}) {
2201                        $line = '+++ b/' .
2202                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2203                                        esc_path($to->{'file'}));
2204                } else {
2205                        $line = '+++ b/' .
2206                                esc_path($to->{'file'});
2207                }
2208        }
2209        $result .= qq!<div class="diff to_file">$line</div>\n!;
2210
2211        return $result;
2212}
2213
2214# create note for patch simplified by combined diff
2215sub format_diff_cc_simplified {
2216        my ($diffinfo, @parents) = @_;
2217        my $result = '';
2218
2219        $result .= "<div class=\"diff header\">" .
2220                   "diff --cc ";
2221        if (!is_deleted($diffinfo)) {
2222                $result .= $cgi->a({-href => href(action=>"blob",
2223                                                  hash_base=>$hash,
2224                                                  hash=>$diffinfo->{'to_id'},
2225                                                  file_name=>$diffinfo->{'to_file'}),
2226                                    -class => "path"},
2227                                   esc_path($diffinfo->{'to_file'}));
2228        } else {
2229                $result .= esc_path($diffinfo->{'to_file'});
2230        }
2231        $result .= "</div>\n" . # class="diff header"
2232                   "<div class=\"diff nodifferences\">" .
2233                   "Simple merge" .
2234                   "</div>\n"; # class="diff nodifferences"
2235
2236        return $result;
2237}
2238
2239sub diff_line_class {
2240        my ($line, $from, $to) = @_;
2241
2242        # ordinary diff
2243        my $num_sign = 1;
2244        # combined diff
2245        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2246                $num_sign = scalar @{$from->{'href'}};
2247        }
2248
2249        my @diff_line_classifier = (
2250                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2251                { regexp => qr/^\\/,               class => "incomplete"  },
2252                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2253                # classifier for context must come before classifier add/rem,
2254                # or we would have to use more complicated regexp, for example
2255                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2256                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2257                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2258        );
2259        for my $clsfy (@diff_line_classifier) {
2260                return $clsfy->{'class'}
2261                        if ($line =~ $clsfy->{'regexp'});
2262        }
2263
2264        # fallback
2265        return "";
2266}
2267
2268# assumes that $from and $to are defined and correctly filled,
2269# and that $line holds a line of chunk header for unified diff
2270sub format_unidiff_chunk_header {
2271        my ($line, $from, $to) = @_;
2272
2273        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2274                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2275
2276        $from_lines = 0 unless defined $from_lines;
2277        $to_lines   = 0 unless defined $to_lines;
2278
2279        if ($from->{'href'}) {
2280                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2281                                     -class=>"list"}, $from_text);
2282        }
2283        if ($to->{'href'}) {
2284                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2285                                     -class=>"list"}, $to_text);
2286        }
2287        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2288                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2289        return $line;
2290}
2291
2292# assumes that $from and $to are defined and correctly filled,
2293# and that $line holds a line of chunk header for combined diff
2294sub format_cc_diff_chunk_header {
2295        my ($line, $from, $to) = @_;
2296
2297        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2298        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2299
2300        @from_text = split(' ', $ranges);
2301        for (my $i = 0; $i < @from_text; ++$i) {
2302                ($from_start[$i], $from_nlines[$i]) =
2303                        (split(',', substr($from_text[$i], 1)), 0);
2304        }
2305
2306        $to_text   = pop @from_text;
2307        $to_start  = pop @from_start;
2308        $to_nlines = pop @from_nlines;
2309
2310        $line = "<span class=\"chunk_info\">$prefix ";
2311        for (my $i = 0; $i < @from_text; ++$i) {
2312                if ($from->{'href'}[$i]) {
2313                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2314                                          -class=>"list"}, $from_text[$i]);
2315                } else {
2316                        $line .= $from_text[$i];
2317                }
2318                $line .= " ";
2319        }
2320        if ($to->{'href'}) {
2321                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2322                                  -class=>"list"}, $to_text);
2323        } else {
2324                $line .= $to_text;
2325        }
2326        $line .= " $prefix</span>" .
2327                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2328        return $line;
2329}
2330
2331# process patch (diff) line (not to be used for diff headers),
2332# returning class and HTML-formatted (but not wrapped) line
2333sub process_diff_line {
2334        my $line = shift;
2335        my ($from, $to) = @_;
2336
2337        my $diff_class = diff_line_class($line, $from, $to);
2338
2339        chomp $line;
2340        $line = untabify($line);
2341
2342        if ($from && $to && $line =~ m/^\@{2} /) {
2343                $line = format_unidiff_chunk_header($line, $from, $to);
2344                return $diff_class, $line;
2345
2346        } elsif ($from && $to && $line =~ m/^\@{3}/) {
2347                $line = format_cc_diff_chunk_header($line, $from, $to);
2348                return $diff_class, $line;
2349
2350        }
2351        return $diff_class, esc_html($line, -nbsp=>1);
2352}
2353
2354# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2355# linked.  Pass the hash of the tree/commit to snapshot.
2356sub format_snapshot_links {
2357        my ($hash) = @_;
2358        my $num_fmts = @snapshot_fmts;
2359        if ($num_fmts > 1) {
2360                # A parenthesized list of links bearing format names.
2361                # e.g. "snapshot (_tar.gz_ _zip_)"
2362                return "snapshot (" . join(' ', map
2363                        $cgi->a({
2364                                -href => href(
2365                                        action=>"snapshot",
2366                                        hash=>$hash,
2367                                        snapshot_format=>$_
2368                                )
2369                        }, $known_snapshot_formats{$_}{'display'})
2370                , @snapshot_fmts) . ")";
2371        } elsif ($num_fmts == 1) {
2372                # A single "snapshot" link whose tooltip bears the format name.
2373                # i.e. "_snapshot_"
2374                my ($fmt) = @snapshot_fmts;
2375                return
2376                        $cgi->a({
2377                                -href => href(
2378                                        action=>"snapshot",
2379                                        hash=>$hash,
2380                                        snapshot_format=>$fmt
2381                                ),
2382                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2383                        }, "snapshot");
2384        } else { # $num_fmts == 0
2385                return undef;
2386        }
2387}
2388
2389## ......................................................................
2390## functions returning values to be passed, perhaps after some
2391## transformation, to other functions; e.g. returning arguments to href()
2392
2393# returns hash to be passed to href to generate gitweb URL
2394# in -title key it returns description of link
2395sub get_feed_info {
2396        my $format = shift || 'Atom';
2397        my %res = (action => lc($format));
2398
2399        # feed links are possible only for project views
2400        return unless (defined $project);
2401        # some views should link to OPML, or to generic project feed,
2402        # or don't have specific feed yet (so they should use generic)
2403        return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2404
2405        my $branch;
2406        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2407        # from tag links; this also makes possible to detect branch links
2408        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2409            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2410                $branch = $1;
2411        }
2412        # find log type for feed description (title)
2413        my $type = 'log';
2414        if (defined $file_name) {
2415                $type  = "history of $file_name";
2416                $type .= "/" if ($action eq 'tree');
2417                $type .= " on '$branch'" if (defined $branch);
2418        } else {
2419                $type = "log of $branch" if (defined $branch);
2420        }
2421
2422        $res{-title} = $type;
2423        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2424        $res{'file_name'} = $file_name;
2425
2426        return %res;
2427}
2428
2429## ----------------------------------------------------------------------
2430## git utility subroutines, invoking git commands
2431
2432# returns path to the core git executable and the --git-dir parameter as list
2433sub git_cmd {
2434        $number_of_git_cmds++;
2435        return $GIT, '--git-dir='.$git_dir;
2436}
2437
2438# quote the given arguments for passing them to the shell
2439# quote_command("command", "arg 1", "arg with ' and ! characters")
2440# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2441# Try to avoid using this function wherever possible.
2442sub quote_command {
2443        return join(' ',
2444                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2445}
2446
2447# get HEAD ref of given project as hash
2448sub git_get_head_hash {
2449        return git_get_full_hash(shift, 'HEAD');
2450}
2451
2452sub git_get_full_hash {
2453        return git_get_hash(@_);
2454}
2455
2456sub git_get_short_hash {
2457        return git_get_hash(@_, '--short=7');
2458}
2459
2460sub git_get_hash {
2461        my ($project, $hash, @options) = @_;
2462        my $o_git_dir = $git_dir;
2463        my $retval = undef;
2464        $git_dir = "$projectroot/$project";
2465        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2466            '--verify', '-q', @options, $hash) {
2467                $retval = <$fd>;
2468                chomp $retval if defined $retval;
2469                close $fd;
2470        }
2471        if (defined $o_git_dir) {
2472                $git_dir = $o_git_dir;
2473        }
2474        return $retval;
2475}
2476
2477# get type of given object
2478sub git_get_type {
2479        my $hash = shift;
2480
2481        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2482        my $type = <$fd>;
2483        close $fd or return;
2484        chomp $type;
2485        return $type;
2486}
2487
2488# repository configuration
2489our $config_file = '';
2490our %config;
2491
2492# store multiple values for single key as anonymous array reference
2493# single values stored directly in the hash, not as [ <value> ]
2494sub hash_set_multi {
2495        my ($hash, $key, $value) = @_;
2496
2497        if (!exists $hash->{$key}) {
2498                $hash->{$key} = $value;
2499        } elsif (!ref $hash->{$key}) {
2500                $hash->{$key} = [ $hash->{$key}, $value ];
2501        } else {
2502                push @{$hash->{$key}}, $value;
2503        }
2504}
2505
2506# return hash of git project configuration
2507# optionally limited to some section, e.g. 'gitweb'
2508sub git_parse_project_config {
2509        my $section_regexp = shift;
2510        my %config;
2511
2512        local $/ = "\0";
2513
2514        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2515                or return;
2516
2517        while (my $keyval = <$fh>) {
2518                chomp $keyval;
2519                my ($key, $value) = split(/\n/, $keyval, 2);
2520
2521                hash_set_multi(\%config, $key, $value)
2522                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2523        }
2524        close $fh;
2525
2526        return %config;
2527}
2528
2529# convert config value to boolean: 'true' or 'false'
2530# no value, number > 0, 'true' and 'yes' values are true
2531# rest of values are treated as false (never as error)
2532sub config_to_bool {
2533        my $val = shift;
2534
2535        return 1 if !defined $val;             # section.key
2536
2537        # strip leading and trailing whitespace
2538        $val =~ s/^\s+//;
2539        $val =~ s/\s+$//;
2540
2541        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2542                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2543}
2544
2545# convert config value to simple decimal number
2546# an optional value suffix of 'k', 'm', or 'g' will cause the value
2547# to be multiplied by 1024, 1048576, or 1073741824
2548sub config_to_int {
2549        my $val = shift;
2550
2551        # strip leading and trailing whitespace
2552        $val =~ s/^\s+//;
2553        $val =~ s/\s+$//;
2554
2555        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2556                $unit = lc($unit);
2557                # unknown unit is treated as 1
2558                return $num * ($unit eq 'g' ? 1073741824 :
2559                               $unit eq 'm' ?    1048576 :
2560                               $unit eq 'k' ?       1024 : 1);
2561        }
2562        return $val;
2563}
2564
2565# convert config value to array reference, if needed
2566sub config_to_multi {
2567        my $val = shift;
2568
2569        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2570}
2571
2572sub git_get_project_config {
2573        my ($key, $type) = @_;
2574
2575        return unless defined $git_dir;
2576
2577        # key sanity check
2578        return unless ($key);
2579        # only subsection, if exists, is case sensitive,
2580        # and not lowercased by 'git config -z -l'
2581        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2582                $key = join(".", lc($hi), $mi, lc($lo));
2583        } else {
2584                $key = lc($key);
2585        }
2586        $key =~ s/^gitweb\.//;
2587        return if ($key =~ m/\W/);
2588
2589        # type sanity check
2590        if (defined $type) {
2591                $type =~ s/^--//;
2592                $type = undef
2593                        unless ($type eq 'bool' || $type eq 'int');
2594        }
2595
2596        # get config
2597        if (!defined $config_file ||
2598            $config_file ne "$git_dir/config") {
2599                %config = git_parse_project_config('gitweb');
2600                $config_file = "$git_dir/config";
2601        }
2602
2603        # check if config variable (key) exists
2604        return unless exists $config{"gitweb.$key"};
2605
2606        # ensure given type
2607        if (!defined $type) {
2608                return $config{"gitweb.$key"};
2609        } elsif ($type eq 'bool') {
2610                # backward compatibility: 'git config --bool' returns true/false
2611                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2612        } elsif ($type eq 'int') {
2613                return config_to_int($config{"gitweb.$key"});
2614        }
2615        return $config{"gitweb.$key"};
2616}
2617
2618# get hash of given path at given ref
2619sub git_get_hash_by_path {
2620        my $base = shift;
2621        my $path = shift || return undef;
2622        my $type = shift;
2623
2624        $path =~ s,/+$,,;
2625
2626        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2627                or die_error(500, "Open git-ls-tree failed");
2628        my $line = <$fd>;
2629        close $fd or return undef;
2630
2631        if (!defined $line) {
2632                # there is no tree or hash given by $path at $base
2633                return undef;
2634        }
2635
2636        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2637        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2638        if (defined $type && $type ne $2) {
2639                # type doesn't match
2640                return undef;
2641        }
2642        return $3;
2643}
2644
2645# get path of entry with given hash at given tree-ish (ref)
2646# used to get 'from' filename for combined diff (merge commit) for renames
2647sub git_get_path_by_hash {
2648        my $base = shift || return;
2649        my $hash = shift || return;
2650
2651        local $/ = "\0";
2652
2653        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2654                or return undef;
2655        while (my $line = <$fd>) {
2656                chomp $line;
2657
2658                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2659                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2660                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2661                        close $fd;
2662                        return $1;
2663                }
2664        }
2665        close $fd;
2666        return undef;
2667}
2668
2669## ......................................................................
2670## git utility functions, directly accessing git repository
2671
2672# get the value of config variable either from file named as the variable
2673# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2674# configuration variable in the repository config file.
2675sub git_get_file_or_project_config {
2676        my ($path, $name) = @_;
2677
2678        $git_dir = "$projectroot/$path";
2679        open my $fd, '<', "$git_dir/$name"
2680                or return git_get_project_config($name);
2681        my $conf = <$fd>;
2682        close $fd;
2683        if (defined $conf) {
2684                chomp $conf;
2685        }
2686        return $conf;
2687}
2688
2689sub git_get_project_description {
2690        my $path = shift;
2691        return git_get_file_or_project_config($path, 'description');
2692}
2693
2694sub git_get_project_category {
2695        my $path = shift;
2696        return git_get_file_or_project_config($path, 'category');
2697}
2698
2699
2700# supported formats:
2701# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2702#   - if its contents is a number, use it as tag weight,
2703#   - otherwise add a tag with weight 1
2704# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2705#   the same value multiple times increases tag weight
2706# * `gitweb.ctag' multi-valued repo config variable
2707sub git_get_project_ctags {
2708        my $project = shift;
2709        my $ctags = {};
2710
2711        $git_dir = "$projectroot/$project";
2712        if (opendir my $dh, "$git_dir/ctags") {
2713                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2714                foreach my $tagfile (@files) {
2715                        open my $ct, '<', $tagfile
2716                                or next;
2717                        my $val = <$ct>;
2718                        chomp $val if $val;
2719                        close $ct;
2720
2721                        (my $ctag = $tagfile) =~ s#.*/##;
2722                        if ($val =~ /^\d+$/) {
2723                                $ctags->{$ctag} = $val;
2724                        } else {
2725                                $ctags->{$ctag} = 1;
2726                        }
2727                }
2728                closedir $dh;
2729
2730        } elsif (open my $fh, '<', "$git_dir/ctags") {
2731                while (my $line = <$fh>) {
2732                        chomp $line;
2733                        $ctags->{$line}++ if $line;
2734                }
2735                close $fh;
2736
2737        } else {
2738                my $taglist = config_to_multi(git_get_project_config('ctag'));
2739                foreach my $tag (@$taglist) {
2740                        $ctags->{$tag}++;
2741                }
2742        }
2743
2744        return $ctags;
2745}
2746
2747# return hash, where keys are content tags ('ctags'),
2748# and values are sum of weights of given tag in every project
2749sub git_gather_all_ctags {
2750        my $projects = shift;
2751        my $ctags = {};
2752
2753        foreach my $p (@$projects) {
2754                foreach my $ct (keys %{$p->{'ctags'}}) {
2755                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2756                }
2757        }
2758
2759        return $ctags;
2760}
2761
2762sub git_populate_project_tagcloud {
2763        my $ctags = shift;
2764
2765        # First, merge different-cased tags; tags vote on casing
2766        my %ctags_lc;
2767        foreach (keys %$ctags) {
2768                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2769                if (not $ctags_lc{lc $_}->{topcount}
2770                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2771                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2772                        $ctags_lc{lc $_}->{topname} = $_;
2773                }
2774        }
2775
2776        my $cloud;
2777        my $matched = $input_params{'ctag'};
2778        if (eval { require HTML::TagCloud; 1; }) {
2779                $cloud = HTML::TagCloud->new;
2780                foreach my $ctag (sort keys %ctags_lc) {
2781                        # Pad the title with spaces so that the cloud looks
2782                        # less crammed.
2783                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2784                        $title =~ s/ /&nbsp;/g;
2785                        $title =~ s/^/&nbsp;/g;
2786                        $title =~ s/$/&nbsp;/g;
2787                        if (defined $matched && $matched eq $ctag) {
2788                                $title = qq(<span class="match">$title</span>);
2789                        }
2790                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2791                                    $ctags_lc{$ctag}->{count});
2792                }
2793        } else {
2794                $cloud = {};
2795                foreach my $ctag (keys %ctags_lc) {
2796                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2797                        if (defined $matched && $matched eq $ctag) {
2798                                $title = qq(<span class="match">$title</span>);
2799                        }
2800                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2801                        $cloud->{$ctag}{ctag} =
2802                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2803                }
2804        }
2805        return $cloud;
2806}
2807
2808sub git_show_project_tagcloud {
2809        my ($cloud, $count) = @_;
2810        if (ref $cloud eq 'HTML::TagCloud') {
2811                return $cloud->html_and_css($count);
2812        } else {
2813                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2814                return
2815                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2816                        join (', ', map {
2817                                $cloud->{$_}->{'ctag'}
2818                        } splice(@tags, 0, $count)) .
2819                        '</div>';
2820        }
2821}
2822
2823sub git_get_project_url_list {
2824        my $path = shift;
2825
2826        $git_dir = "$projectroot/$path";
2827        open my $fd, '<', "$git_dir/cloneurl"
2828                or return wantarray ?
2829                @{ config_to_multi(git_get_project_config('url')) } :
2830                   config_to_multi(git_get_project_config('url'));
2831        my @git_project_url_list = map { chomp; $_ } <$fd>;
2832        close $fd;
2833
2834        return wantarray ? @git_project_url_list : \@git_project_url_list;
2835}
2836
2837sub git_get_projects_list {
2838        my $filter = shift || '';
2839        my @list;
2840
2841        $filter =~ s/\.git$//;
2842
2843        if (-d $projects_list) {
2844                # search in directory
2845                my $dir = $projects_list;
2846                # remove the trailing "/"
2847                $dir =~ s!/+$!!;
2848                my $pfxlen = length("$dir");
2849                my $pfxdepth = ($dir =~ tr!/!!);
2850                # when filtering, search only given subdirectory
2851                if ($filter) {
2852                        $dir .= "/$filter";
2853                        $dir =~ s!/+$!!;
2854                }
2855
2856                File::Find::find({
2857                        follow_fast => 1, # follow symbolic links
2858                        follow_skip => 2, # ignore duplicates
2859                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2860                        wanted => sub {
2861                                # global variables
2862                                our $project_maxdepth;
2863                                our $projectroot;
2864                                # skip project-list toplevel, if we get it.
2865                                return if (m!^[/.]$!);
2866                                # only directories can be git repositories
2867                                return unless (-d $_);
2868                                # don't traverse too deep (Find is super slow on os x)
2869                                # $project_maxdepth excludes depth of $projectroot
2870                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2871                                        $File::Find::prune = 1;
2872                                        return;
2873                                }
2874
2875                                my $path = substr($File::Find::name, $pfxlen + 1);
2876                                # we check related file in $projectroot
2877                                if (check_export_ok("$projectroot/$path")) {
2878                                        push @list, { path => $path };
2879                                        $File::Find::prune = 1;
2880                                }
2881                        },
2882                }, "$dir");
2883
2884        } elsif (-f $projects_list) {
2885                # read from file(url-encoded):
2886                # 'git%2Fgit.git Linus+Torvalds'
2887                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2888                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2889                open my $fd, '<', $projects_list or return;
2890        PROJECT:
2891                while (my $line = <$fd>) {
2892                        chomp $line;
2893                        my ($path, $owner) = split ' ', $line;
2894                        $path = unescape($path);
2895                        $owner = unescape($owner);
2896                        if (!defined $path) {
2897                                next;
2898                        }
2899                        # if $filter is rpovided, check if $path begins with $filter
2900                        if ($filter && $path !~ m!^\Q$filter\E/!) {
2901                                next;
2902                        }
2903                        if (check_export_ok("$projectroot/$path")) {
2904                                my $pr = {
2905                                        path => $path,
2906                                        owner => to_utf8($owner),
2907                                };
2908                                push @list, $pr;
2909                        }
2910                }
2911                close $fd;
2912        }
2913        return @list;
2914}
2915
2916# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
2917# as side effects it sets 'forks' field to list of forks for forked projects
2918sub filter_forks_from_projects_list {
2919        my $projects = shift;
2920
2921        my %trie; # prefix tree of directories (path components)
2922        # generate trie out of those directories that might contain forks
2923        foreach my $pr (@$projects) {
2924                my $path = $pr->{'path'};
2925                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
2926                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
2927                next unless ($path);      # skip '.git' repository: tests, git-instaweb
2928                next unless (-d "$projectroot/$path"); # containing directory exists
2929                $pr->{'forks'} = [];      # there can be 0 or more forks of project
2930
2931                # add to trie
2932                my @dirs = split('/', $path);
2933                # walk the trie, until either runs out of components or out of trie
2934                my $ref = \%trie;
2935                while (scalar @dirs &&
2936                       exists($ref->{$dirs[0]})) {
2937                        $ref = $ref->{shift @dirs};
2938                }
2939                # create rest of trie structure from rest of components
2940                foreach my $dir (@dirs) {
2941                        $ref = $ref->{$dir} = {};
2942                }
2943                # create end marker, store $pr as a data
2944                $ref->{''} = $pr if (!exists $ref->{''});
2945        }
2946
2947        # filter out forks, by finding shortest prefix match for paths
2948        my @filtered;
2949 PROJECT:
2950        foreach my $pr (@$projects) {
2951                # trie lookup
2952                my $ref = \%trie;
2953        DIR:
2954                foreach my $dir (split('/', $pr->{'path'})) {
2955                        if (exists $ref->{''}) {
2956                                # found [shortest] prefix, is a fork - skip it
2957                                push @{$ref->{''}{'forks'}}, $pr;
2958                                next PROJECT;
2959                        }
2960                        if (!exists $ref->{$dir}) {
2961                                # not in trie, cannot have prefix, not a fork
2962                                push @filtered, $pr;
2963                                next PROJECT;
2964                        }
2965                        # If the dir is there, we just walk one step down the trie.
2966                        $ref = $ref->{$dir};
2967                }
2968                # we ran out of trie
2969                # (shouldn't happen: it's either no match, or end marker)
2970                push @filtered, $pr;
2971        }
2972
2973        return @filtered;
2974}
2975
2976# note: fill_project_list_info must be run first,
2977# for 'descr_long' and 'ctags' to be filled
2978sub search_projects_list {
2979        my ($projlist, %opts) = @_;
2980        my $tagfilter  = $opts{'tagfilter'};
2981        my $searchtext = $opts{'searchtext'};
2982
2983        return @$projlist
2984                unless ($tagfilter || $searchtext);
2985
2986        my @projects;
2987 PROJECT:
2988        foreach my $pr (@$projlist) {
2989
2990                if ($tagfilter) {
2991                        next unless ref($pr->{'ctags'}) eq 'HASH';
2992                        next unless
2993                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
2994                }
2995
2996                if ($searchtext) {
2997                        next unless
2998                                $pr->{'path'} =~ /$searchtext/ ||
2999                                $pr->{'descr_long'} =~ /$searchtext/;
3000                }
3001
3002                push @projects, $pr;
3003        }
3004
3005        return @projects;
3006}
3007
3008our $gitweb_project_owner = undef;
3009sub git_get_project_list_from_file {
3010
3011        return if (defined $gitweb_project_owner);
3012
3013        $gitweb_project_owner = {};
3014        # read from file (url-encoded):
3015        # 'git%2Fgit.git Linus+Torvalds'
3016        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3017        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3018        if (-f $projects_list) {
3019                open(my $fd, '<', $projects_list);
3020                while (my $line = <$fd>) {
3021                        chomp $line;
3022                        my ($pr, $ow) = split ' ', $line;
3023                        $pr = unescape($pr);
3024                        $ow = unescape($ow);
3025                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3026                }
3027                close $fd;
3028        }
3029}
3030
3031sub git_get_project_owner {
3032        my $project = shift;
3033        my $owner;
3034
3035        return undef unless $project;
3036        $git_dir = "$projectroot/$project";
3037
3038        if (!defined $gitweb_project_owner) {
3039                git_get_project_list_from_file();
3040        }
3041
3042        if (exists $gitweb_project_owner->{$project}) {
3043                $owner = $gitweb_project_owner->{$project};
3044        }
3045        if (!defined $owner){
3046                $owner = git_get_project_config('owner');
3047        }
3048        if (!defined $owner) {
3049                $owner = get_file_owner("$git_dir");
3050        }
3051
3052        return $owner;
3053}
3054
3055sub git_get_last_activity {
3056        my ($path) = @_;
3057        my $fd;
3058
3059        $git_dir = "$projectroot/$path";
3060        open($fd, "-|", git_cmd(), 'for-each-ref',
3061             '--format=%(committer)',
3062             '--sort=-committerdate',
3063             '--count=1',
3064             'refs/heads') or return;
3065        my $most_recent = <$fd>;
3066        close $fd or return;
3067        if (defined $most_recent &&
3068            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3069                my $timestamp = $1;
3070                my $age = time - $timestamp;
3071                return ($age, age_string($age));
3072        }
3073        return (undef, undef);
3074}
3075
3076# Implementation note: when a single remote is wanted, we cannot use 'git
3077# remote show -n' because that command always work (assuming it's a remote URL
3078# if it's not defined), and we cannot use 'git remote show' because that would
3079# try to make a network roundtrip. So the only way to find if that particular
3080# remote is defined is to walk the list provided by 'git remote -v' and stop if
3081# and when we find what we want.
3082sub git_get_remotes_list {
3083        my $wanted = shift;
3084        my %remotes = ();
3085
3086        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3087        return unless $fd;
3088        while (my $remote = <$fd>) {
3089                chomp $remote;
3090                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3091                next if $wanted and not $remote eq $wanted;
3092                my ($url, $key) = ($1, $2);
3093
3094                $remotes{$remote} ||= { 'heads' => () };
3095                $remotes{$remote}{$key} = $url;
3096        }
3097        close $fd or return;
3098        return wantarray ? %remotes : \%remotes;
3099}
3100
3101# Takes a hash of remotes as first parameter and fills it by adding the
3102# available remote heads for each of the indicated remotes.
3103sub fill_remote_heads {
3104        my $remotes = shift;
3105        my @heads = map { "remotes/$_" } keys %$remotes;
3106        my @remoteheads = git_get_heads_list(undef, @heads);
3107        foreach my $remote (keys %$remotes) {
3108                $remotes->{$remote}{'heads'} = [ grep {
3109                        $_->{'name'} =~ s!^$remote/!!
3110                        } @remoteheads ];
3111        }
3112}
3113
3114sub git_get_references {
3115        my $type = shift || "";
3116        my %refs;
3117        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3118        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3119        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3120                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3121                or return;
3122
3123        while (my $line = <$fd>) {
3124                chomp $line;
3125                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3126                        if (defined $refs{$1}) {
3127                                push @{$refs{$1}}, $2;
3128                        } else {
3129                                $refs{$1} = [ $2 ];
3130                        }
3131                }
3132        }
3133        close $fd or return;
3134        return \%refs;
3135}
3136
3137sub git_get_rev_name_tags {
3138        my $hash = shift || return undef;
3139
3140        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3141                or return;
3142        my $name_rev = <$fd>;
3143        close $fd;
3144
3145        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3146                return $1;
3147        } else {
3148                # catches also '$hash undefined' output
3149                return undef;
3150        }
3151}
3152
3153## ----------------------------------------------------------------------
3154## parse to hash functions
3155
3156sub parse_date {
3157        my $epoch = shift;
3158        my $tz = shift || "-0000";
3159
3160        my %date;
3161        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3162        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3163        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3164        $date{'hour'} = $hour;
3165        $date{'minute'} = $min;
3166        $date{'mday'} = $mday;
3167        $date{'day'} = $days[$wday];
3168        $date{'month'} = $months[$mon];
3169        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3170                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3171        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3172                             $mday, $months[$mon], $hour ,$min;
3173        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3174                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3175
3176        my ($tz_sign, $tz_hour, $tz_min) =
3177                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3178        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3179        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3180        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3181        $date{'hour_local'} = $hour;
3182        $date{'minute_local'} = $min;
3183        $date{'tz_local'} = $tz;
3184        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3185                                  1900+$year, $mon+1, $mday,
3186                                  $hour, $min, $sec, $tz);
3187        return %date;
3188}
3189
3190sub parse_tag {
3191        my $tag_id = shift;
3192        my %tag;
3193        my @comment;
3194
3195        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3196        $tag{'id'} = $tag_id;
3197        while (my $line = <$fd>) {
3198                chomp $line;
3199                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3200                        $tag{'object'} = $1;
3201                } elsif ($line =~ m/^type (.+)$/) {
3202                        $tag{'type'} = $1;
3203                } elsif ($line =~ m/^tag (.+)$/) {
3204                        $tag{'name'} = $1;
3205                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3206                        $tag{'author'} = $1;
3207                        $tag{'author_epoch'} = $2;
3208                        $tag{'author_tz'} = $3;
3209                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3210                                $tag{'author_name'}  = $1;
3211                                $tag{'author_email'} = $2;
3212                        } else {
3213                                $tag{'author_name'} = $tag{'author'};
3214                        }
3215                } elsif ($line =~ m/--BEGIN/) {
3216                        push @comment, $line;
3217                        last;
3218                } elsif ($line eq "") {
3219                        last;
3220                }
3221        }
3222        push @comment, <$fd>;
3223        $tag{'comment'} = \@comment;
3224        close $fd or return;
3225        if (!defined $tag{'name'}) {
3226                return
3227        };
3228        return %tag
3229}
3230
3231sub parse_commit_text {
3232        my ($commit_text, $withparents) = @_;
3233        my @commit_lines = split '\n', $commit_text;
3234        my %co;
3235
3236        pop @commit_lines; # Remove '\0'
3237
3238        if (! @commit_lines) {
3239                return;
3240        }
3241
3242        my $header = shift @commit_lines;
3243        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3244                return;
3245        }
3246        ($co{'id'}, my @parents) = split ' ', $header;
3247        while (my $line = shift @commit_lines) {
3248                last if $line eq "\n";
3249                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3250                        $co{'tree'} = $1;
3251                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3252                        push @parents, $1;
3253                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3254                        $co{'author'} = to_utf8($1);
3255                        $co{'author_epoch'} = $2;
3256                        $co{'author_tz'} = $3;
3257                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3258                                $co{'author_name'}  = $1;
3259                                $co{'author_email'} = $2;
3260                        } else {
3261                                $co{'author_name'} = $co{'author'};
3262                        }
3263                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3264                        $co{'committer'} = to_utf8($1);
3265                        $co{'committer_epoch'} = $2;
3266                        $co{'committer_tz'} = $3;
3267                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3268                                $co{'committer_name'}  = $1;
3269                                $co{'committer_email'} = $2;
3270                        } else {
3271                                $co{'committer_name'} = $co{'committer'};
3272                        }
3273                }
3274        }
3275        if (!defined $co{'tree'}) {
3276                return;
3277        };
3278        $co{'parents'} = \@parents;
3279        $co{'parent'} = $parents[0];
3280
3281        foreach my $title (@commit_lines) {
3282                $title =~ s/^    //;
3283                if ($title ne "") {
3284                        $co{'title'} = chop_str($title, 80, 5);
3285                        # remove leading stuff of merges to make the interesting part visible
3286                        if (length($title) > 50) {
3287                                $title =~ s/^Automatic //;
3288                                $title =~ s/^merge (of|with) /Merge ... /i;
3289                                if (length($title) > 50) {
3290                                        $title =~ s/(http|rsync):\/\///;
3291                                }
3292                                if (length($title) > 50) {
3293                                        $title =~ s/(master|www|rsync)\.//;
3294                                }
3295                                if (length($title) > 50) {
3296                                        $title =~ s/kernel.org:?//;
3297                                }
3298                                if (length($title) > 50) {
3299                                        $title =~ s/\/pub\/scm//;
3300                                }
3301                        }
3302                        $co{'title_short'} = chop_str($title, 50, 5);
3303                        last;
3304                }
3305        }
3306        if (! defined $co{'title'} || $co{'title'} eq "") {
3307                $co{'title'} = $co{'title_short'} = '(no commit message)';
3308        }
3309        # remove added spaces
3310        foreach my $line (@commit_lines) {
3311                $line =~ s/^    //;
3312        }
3313        $co{'comment'} = \@commit_lines;
3314
3315        my $age = time - $co{'committer_epoch'};
3316        $co{'age'} = $age;
3317        $co{'age_string'} = age_string($age);
3318        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3319        if ($age > 60*60*24*7*2) {
3320                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3321                $co{'age_string_age'} = $co{'age_string'};
3322        } else {
3323                $co{'age_string_date'} = $co{'age_string'};
3324                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3325        }
3326        return %co;
3327}
3328
3329sub parse_commit {
3330        my ($commit_id) = @_;
3331        my %co;
3332
3333        local $/ = "\0";
3334
3335        open my $fd, "-|", git_cmd(), "rev-list",
3336                "--parents",
3337                "--header",
3338                "--max-count=1",
3339                $commit_id,
3340                "--",
3341                or die_error(500, "Open git-rev-list failed");
3342        %co = parse_commit_text(<$fd>, 1);
3343        close $fd;
3344
3345        return %co;
3346}
3347
3348sub parse_commits {
3349        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3350        my @cos;
3351
3352        $maxcount ||= 1;
3353        $skip ||= 0;
3354
3355        local $/ = "\0";
3356
3357        open my $fd, "-|", git_cmd(), "rev-list",
3358                "--header",
3359                @args,
3360                ("--max-count=" . $maxcount),
3361                ("--skip=" . $skip),
3362                @extra_options,
3363                $commit_id,
3364                "--",
3365                ($filename ? ($filename) : ())
3366                or die_error(500, "Open git-rev-list failed");
3367        while (my $line = <$fd>) {
3368                my %co = parse_commit_text($line);
3369                push @cos, \%co;
3370        }
3371        close $fd;
3372
3373        return wantarray ? @cos : \@cos;
3374}
3375
3376# parse line of git-diff-tree "raw" output
3377sub parse_difftree_raw_line {
3378        my $line = shift;
3379        my %res;
3380
3381        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3382        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3383        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3384                $res{'from_mode'} = $1;
3385                $res{'to_mode'} = $2;
3386                $res{'from_id'} = $3;
3387                $res{'to_id'} = $4;
3388                $res{'status'} = $5;
3389                $res{'similarity'} = $6;
3390                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3391                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3392                } else {
3393                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3394                }
3395        }
3396        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3397        # combined diff (for merge commit)
3398        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3399                $res{'nparents'}  = length($1);
3400                $res{'from_mode'} = [ split(' ', $2) ];
3401                $res{'to_mode'} = pop @{$res{'from_mode'}};
3402                $res{'from_id'} = [ split(' ', $3) ];
3403                $res{'to_id'} = pop @{$res{'from_id'}};
3404                $res{'status'} = [ split('', $4) ];
3405                $res{'to_file'} = unquote($5);
3406        }
3407        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3408        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3409                $res{'commit'} = $1;
3410        }
3411
3412        return wantarray ? %res : \%res;
3413}
3414
3415# wrapper: return parsed line of git-diff-tree "raw" output
3416# (the argument might be raw line, or parsed info)
3417sub parsed_difftree_line {
3418        my $line_or_ref = shift;
3419
3420        if (ref($line_or_ref) eq "HASH") {
3421                # pre-parsed (or generated by hand)
3422                return $line_or_ref;
3423        } else {
3424                return parse_difftree_raw_line($line_or_ref);
3425        }
3426}
3427
3428# parse line of git-ls-tree output
3429sub parse_ls_tree_line {
3430        my $line = shift;
3431        my %opts = @_;
3432        my %res;
3433
3434        if ($opts{'-l'}) {
3435                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3436                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3437
3438                $res{'mode'} = $1;
3439                $res{'type'} = $2;
3440                $res{'hash'} = $3;
3441                $res{'size'} = $4;
3442                if ($opts{'-z'}) {
3443                        $res{'name'} = $5;
3444                } else {
3445                        $res{'name'} = unquote($5);
3446                }
3447        } else {
3448                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3449                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3450
3451                $res{'mode'} = $1;
3452                $res{'type'} = $2;
3453                $res{'hash'} = $3;
3454                if ($opts{'-z'}) {
3455                        $res{'name'} = $4;
3456                } else {
3457                        $res{'name'} = unquote($4);
3458                }
3459        }
3460
3461        return wantarray ? %res : \%res;
3462}
3463
3464# generates _two_ hashes, references to which are passed as 2 and 3 argument
3465sub parse_from_to_diffinfo {
3466        my ($diffinfo, $from, $to, @parents) = @_;
3467
3468        if ($diffinfo->{'nparents'}) {
3469                # combined diff
3470                $from->{'file'} = [];
3471                $from->{'href'} = [];
3472                fill_from_file_info($diffinfo, @parents)
3473                        unless exists $diffinfo->{'from_file'};
3474                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3475                        $from->{'file'}[$i] =
3476                                defined $diffinfo->{'from_file'}[$i] ?
3477                                        $diffinfo->{'from_file'}[$i] :
3478                                        $diffinfo->{'to_file'};
3479                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3480                                $from->{'href'}[$i] = href(action=>"blob",
3481                                                           hash_base=>$parents[$i],
3482                                                           hash=>$diffinfo->{'from_id'}[$i],
3483                                                           file_name=>$from->{'file'}[$i]);
3484                        } else {
3485                                $from->{'href'}[$i] = undef;
3486                        }
3487                }
3488        } else {
3489                # ordinary (not combined) diff
3490                $from->{'file'} = $diffinfo->{'from_file'};
3491                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3492                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3493                                               hash=>$diffinfo->{'from_id'},
3494                                               file_name=>$from->{'file'});
3495                } else {
3496                        delete $from->{'href'};
3497                }
3498        }
3499
3500        $to->{'file'} = $diffinfo->{'to_file'};
3501        if (!is_deleted($diffinfo)) { # file exists in result
3502                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3503                                     hash=>$diffinfo->{'to_id'},
3504                                     file_name=>$to->{'file'});
3505        } else {
3506                delete $to->{'href'};
3507        }
3508}
3509
3510## ......................................................................
3511## parse to array of hashes functions
3512
3513sub git_get_heads_list {
3514        my ($limit, @classes) = @_;
3515        @classes = ('heads') unless @classes;
3516        my @patterns = map { "refs/$_" } @classes;
3517        my @headslist;
3518
3519        open my $fd, '-|', git_cmd(), 'for-each-ref',
3520                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3521                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3522                @patterns
3523                or return;
3524        while (my $line = <$fd>) {
3525                my %ref_item;
3526
3527                chomp $line;
3528                my ($refinfo, $committerinfo) = split(/\0/, $line);
3529                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3530                my ($committer, $epoch, $tz) =
3531                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3532                $ref_item{'fullname'}  = $name;
3533                $name =~ s!^refs/(?:head|remote)s/!!;
3534
3535                $ref_item{'name'}  = $name;
3536                $ref_item{'id'}    = $hash;
3537                $ref_item{'title'} = $title || '(no commit message)';
3538                $ref_item{'epoch'} = $epoch;
3539                if ($epoch) {
3540                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3541                } else {
3542                        $ref_item{'age'} = "unknown";
3543                }
3544
3545                push @headslist, \%ref_item;
3546        }
3547        close $fd;
3548
3549        return wantarray ? @headslist : \@headslist;
3550}
3551
3552sub git_get_tags_list {
3553        my $limit = shift;
3554        my @tagslist;
3555
3556        open my $fd, '-|', git_cmd(), 'for-each-ref',
3557                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3558                '--format=%(objectname) %(objecttype) %(refname) '.
3559                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3560                'refs/tags'
3561                or return;
3562        while (my $line = <$fd>) {
3563                my %ref_item;
3564
3565                chomp $line;
3566                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3567                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3568                my ($creator, $epoch, $tz) =
3569                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3570                $ref_item{'fullname'} = $name;
3571                $name =~ s!^refs/tags/!!;
3572
3573                $ref_item{'type'} = $type;
3574                $ref_item{'id'} = $id;
3575                $ref_item{'name'} = $name;
3576                if ($type eq "tag") {
3577                        $ref_item{'subject'} = $title;
3578                        $ref_item{'reftype'} = $reftype;
3579                        $ref_item{'refid'}   = $refid;
3580                } else {
3581                        $ref_item{'reftype'} = $type;
3582                        $ref_item{'refid'}   = $id;
3583                }
3584
3585                if ($type eq "tag" || $type eq "commit") {
3586                        $ref_item{'epoch'} = $epoch;
3587                        if ($epoch) {
3588                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3589                        } else {
3590                                $ref_item{'age'} = "unknown";
3591                        }
3592                }
3593
3594                push @tagslist, \%ref_item;
3595        }
3596        close $fd;
3597
3598        return wantarray ? @tagslist : \@tagslist;
3599}
3600
3601## ----------------------------------------------------------------------
3602## filesystem-related functions
3603
3604sub get_file_owner {
3605        my $path = shift;
3606
3607        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3608        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3609        if (!defined $gcos) {
3610                return undef;
3611        }
3612        my $owner = $gcos;
3613        $owner =~ s/[,;].*$//;
3614        return to_utf8($owner);
3615}
3616
3617# assume that file exists
3618sub insert_file {
3619        my $filename = shift;
3620
3621        open my $fd, '<', $filename;
3622        print map { to_utf8($_) } <$fd>;
3623        close $fd;
3624}
3625
3626## ......................................................................
3627## mimetype related functions
3628
3629sub mimetype_guess_file {
3630        my $filename = shift;
3631        my $mimemap = shift;
3632        -r $mimemap or return undef;
3633
3634        my %mimemap;
3635        open(my $mh, '<', $mimemap) or return undef;
3636        while (<$mh>) {
3637                next if m/^#/; # skip comments
3638                my ($mimetype, @exts) = split(/\s+/);
3639                foreach my $ext (@exts) {
3640                        $mimemap{$ext} = $mimetype;
3641                }
3642        }
3643        close($mh);
3644
3645        $filename =~ /\.([^.]*)$/;
3646        return $mimemap{$1};
3647}
3648
3649sub mimetype_guess {
3650        my $filename = shift;
3651        my $mime;
3652        $filename =~ /\./ or return undef;
3653
3654        if ($mimetypes_file) {
3655                my $file = $mimetypes_file;
3656                if ($file !~ m!^/!) { # if it is relative path
3657                        # it is relative to project
3658                        $file = "$projectroot/$project/$file";
3659                }
3660                $mime = mimetype_guess_file($filename, $file);
3661        }
3662        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3663        return $mime;
3664}
3665
3666sub blob_mimetype {
3667        my $fd = shift;
3668        my $filename = shift;
3669
3670        if ($filename) {
3671                my $mime = mimetype_guess($filename);
3672                $mime and return $mime;
3673        }
3674
3675        # just in case
3676        return $default_blob_plain_mimetype unless $fd;
3677
3678        if (-T $fd) {
3679                return 'text/plain';
3680        } elsif (! $filename) {
3681                return 'application/octet-stream';
3682        } elsif ($filename =~ m/\.png$/i) {
3683                return 'image/png';
3684        } elsif ($filename =~ m/\.gif$/i) {
3685                return 'image/gif';
3686        } elsif ($filename =~ m/\.jpe?g$/i) {
3687                return 'image/jpeg';
3688        } else {
3689                return 'application/octet-stream';
3690        }
3691}
3692
3693sub blob_contenttype {
3694        my ($fd, $file_name, $type) = @_;
3695
3696        $type ||= blob_mimetype($fd, $file_name);
3697        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3698                $type .= "; charset=$default_text_plain_charset";
3699        }
3700
3701        return $type;
3702}
3703
3704# guess file syntax for syntax highlighting; return undef if no highlighting
3705# the name of syntax can (in the future) depend on syntax highlighter used
3706sub guess_file_syntax {
3707        my ($highlight, $mimetype, $file_name) = @_;
3708        return undef unless ($highlight && defined $file_name);
3709        my $basename = basename($file_name, '.in');
3710        return $highlight_basename{$basename}
3711                if exists $highlight_basename{$basename};
3712
3713        $basename =~ /\.([^.]*)$/;
3714        my $ext = $1 or return undef;
3715        return $highlight_ext{$ext}
3716                if exists $highlight_ext{$ext};
3717
3718        return undef;
3719}
3720
3721# run highlighter and return FD of its output,
3722# or return original FD if no highlighting
3723sub run_highlighter {
3724        my ($fd, $highlight, $syntax) = @_;
3725        return $fd unless ($highlight && defined $syntax);
3726
3727        close $fd;
3728        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3729                  quote_command($highlight_bin).
3730                  " --replace-tabs=8 --fragment --syntax $syntax |"
3731                or die_error(500, "Couldn't open file or run syntax highlighter");
3732        return $fd;
3733}
3734
3735## ======================================================================
3736## functions printing HTML: header, footer, error page
3737
3738sub get_page_title {
3739        my $title = to_utf8($site_name);
3740
3741        return $title unless (defined $project);
3742        $title .= " - " . to_utf8($project);
3743
3744        return $title unless (defined $action);
3745        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3746
3747        return $title unless (defined $file_name);
3748        $title .= " - " . esc_path($file_name);
3749        if ($action eq "tree" && $file_name !~ m|/$|) {
3750                $title .= "/";
3751        }
3752
3753        return $title;
3754}
3755
3756sub get_content_type_html {
3757        # require explicit support from the UA if we are to send the page as
3758        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3759        # we have to do this because MSIE sometimes globs '*/*', pretending to
3760        # support xhtml+xml but choking when it gets what it asked for.
3761        if (defined $cgi->http('HTTP_ACCEPT') &&
3762            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3763            $cgi->Accept('application/xhtml+xml') != 0) {
3764                return 'application/xhtml+xml';
3765        } else {
3766                return 'text/html';
3767        }
3768}
3769
3770sub print_feed_meta {
3771        if (defined $project) {
3772                my %href_params = get_feed_info();
3773                if (!exists $href_params{'-title'}) {
3774                        $href_params{'-title'} = 'log';
3775                }
3776
3777                foreach my $format (qw(RSS Atom)) {
3778                        my $type = lc($format);
3779                        my %link_attr = (
3780                                '-rel' => 'alternate',
3781                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3782                                '-type' => "application/$type+xml"
3783                        );
3784
3785                        $href_params{'action'} = $type;
3786                        $link_attr{'-href'} = href(%href_params);
3787                        print "<link ".
3788                              "rel=\"$link_attr{'-rel'}\" ".
3789                              "title=\"$link_attr{'-title'}\" ".
3790                              "href=\"$link_attr{'-href'}\" ".
3791                              "type=\"$link_attr{'-type'}\" ".
3792                              "/>\n";
3793
3794                        $href_params{'extra_options'} = '--no-merges';
3795                        $link_attr{'-href'} = href(%href_params);
3796                        $link_attr{'-title'} .= ' (no merges)';
3797                        print "<link ".
3798                              "rel=\"$link_attr{'-rel'}\" ".
3799                              "title=\"$link_attr{'-title'}\" ".
3800                              "href=\"$link_attr{'-href'}\" ".
3801                              "type=\"$link_attr{'-type'}\" ".
3802                              "/>\n";
3803                }
3804
3805        } else {
3806                printf('<link rel="alternate" title="%s projects list" '.
3807                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3808                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3809                printf('<link rel="alternate" title="%s projects feeds" '.
3810                       'href="%s" type="text/x-opml" />'."\n",
3811                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3812        }
3813}
3814
3815sub print_header_links {
3816        my $status = shift;
3817
3818        # print out each stylesheet that exist, providing backwards capability
3819        # for those people who defined $stylesheet in a config file
3820        if (defined $stylesheet) {
3821                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3822        } else {
3823                foreach my $stylesheet (@stylesheets) {
3824                        next unless $stylesheet;
3825                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3826                }
3827        }
3828        print_feed_meta()
3829                if ($status eq '200 OK');
3830        if (defined $favicon) {
3831                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3832        }
3833}
3834
3835sub print_nav_breadcrumbs {
3836        my %opts = @_;
3837
3838        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3839        if (defined $project) {
3840                print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3841                if (defined $action) {
3842                        my $action_print = $action ;
3843                        if (defined $opts{-action_extra}) {
3844                                $action_print = $cgi->a({-href => href(action=>$action)},
3845                                        $action);
3846                        }
3847                        print " / $action_print";
3848                }
3849                if (defined $opts{-action_extra}) {
3850                        print " / $opts{-action_extra}";
3851                }
3852                print "\n";
3853        }
3854}
3855
3856sub print_search_form {
3857        if (!defined $searchtext) {
3858                $searchtext = "";
3859        }
3860        my $search_hash;
3861        if (defined $hash_base) {
3862                $search_hash = $hash_base;
3863        } elsif (defined $hash) {
3864                $search_hash = $hash;
3865        } else {
3866                $search_hash = "HEAD";
3867        }
3868        my $action = $my_uri;
3869        my $use_pathinfo = gitweb_check_feature('pathinfo');
3870        if ($use_pathinfo) {
3871                $action .= "/".esc_url($project);
3872        }
3873        print $cgi->startform(-method => "get", -action => $action) .
3874              "<div class=\"search\">\n" .
3875              (!$use_pathinfo &&
3876              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3877              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3878              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3879              $cgi->popup_menu(-name => 'st', -default => 'commit',
3880                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3881              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3882              " search:\n",
3883              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
3884              "<span title=\"Extended regular expression\">" .
3885              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3886                             -checked => $search_use_regexp) .
3887              "</span>" .
3888              "</div>" .
3889              $cgi->end_form() . "\n";
3890}
3891
3892sub git_header_html {
3893        my $status = shift || "200 OK";
3894        my $expires = shift;
3895        my %opts = @_;
3896
3897        my $title = get_page_title();
3898        my $content_type = get_content_type_html();
3899        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3900                           -status=> $status, -expires => $expires)
3901                unless ($opts{'-no_http_header'});
3902        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3903        print <<EOF;
3904<?xml version="1.0" encoding="utf-8"?>
3905<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3906<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3907<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3908<!-- git core binaries version $git_version -->
3909<head>
3910<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3911<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3912<meta name="robots" content="index, nofollow"/>
3913<title>$title</title>
3914EOF
3915        # the stylesheet, favicon etc urls won't work correctly with path_info
3916        # unless we set the appropriate base URL
3917        if ($ENV{'PATH_INFO'}) {
3918                print "<base href=\"".esc_url($base_url)."\" />\n";
3919        }
3920        print_header_links($status);
3921
3922        if (defined $site_html_head_string) {
3923                print to_utf8($site_html_head_string);
3924        }
3925
3926        print "</head>\n" .
3927              "<body>\n";
3928
3929        if (defined $site_header && -f $site_header) {
3930                insert_file($site_header);
3931        }
3932
3933        print "<div class=\"page_header\">\n";
3934        if (defined $logo) {
3935                print $cgi->a({-href => esc_url($logo_url),
3936                               -title => $logo_label},
3937                              $cgi->img({-src => esc_url($logo),
3938                                         -width => 72, -height => 27,
3939                                         -alt => "git",
3940                                         -class => "logo"}));
3941        }
3942        print_nav_breadcrumbs(%opts);
3943        print "</div>\n";
3944
3945        my $have_search = gitweb_check_feature('search');
3946        if (defined $project && $have_search) {
3947                print_search_form();
3948        }
3949}
3950
3951sub git_footer_html {
3952        my $feed_class = 'rss_logo';
3953
3954        print "<div class=\"page_footer\">\n";
3955        if (defined $project) {
3956                my $descr = git_get_project_description($project);
3957                if (defined $descr) {
3958                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3959                }
3960
3961                my %href_params = get_feed_info();
3962                if (!%href_params) {
3963                        $feed_class .= ' generic';
3964                }
3965                $href_params{'-title'} ||= 'log';
3966
3967                foreach my $format (qw(RSS Atom)) {
3968                        $href_params{'action'} = lc($format);
3969                        print $cgi->a({-href => href(%href_params),
3970                                      -title => "$href_params{'-title'} $format feed",
3971                                      -class => $feed_class}, $format)."\n";
3972                }
3973
3974        } else {
3975                print $cgi->a({-href => href(project=>undef, action=>"opml"),
3976                              -class => $feed_class}, "OPML") . " ";
3977                print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3978                              -class => $feed_class}, "TXT") . "\n";
3979        }
3980        print "</div>\n"; # class="page_footer"
3981
3982        if (defined $t0 && gitweb_check_feature('timed')) {
3983                print "<div id=\"generating_info\">\n";
3984                print 'This page took '.
3985                      '<span id="generating_time" class="time_span">'.
3986                      tv_interval($t0, [ gettimeofday() ]).
3987                      ' seconds </span>'.
3988                      ' and '.
3989                      '<span id="generating_cmd">'.
3990                      $number_of_git_cmds.
3991                      '</span> git commands '.
3992                      " to generate.\n";
3993                print "</div>\n"; # class="page_footer"
3994        }
3995
3996        if (defined $site_footer && -f $site_footer) {
3997                insert_file($site_footer);
3998        }
3999
4000        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4001        if (defined $action &&
4002            $action eq 'blame_incremental') {
4003                print qq!<script type="text/javascript">\n!.
4004                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4005                      qq!           "!. href() .qq!");\n!.
4006                      qq!</script>\n!;
4007        } else {
4008                my ($jstimezone, $tz_cookie, $datetime_class) =
4009                        gitweb_get_feature('javascript-timezone');
4010
4011                print qq!<script type="text/javascript">\n!.
4012                      qq!window.onload = function () {\n!;
4013                if (gitweb_check_feature('javascript-actions')) {
4014                        print qq!       fixLinks();\n!;
4015                }
4016                if ($jstimezone && $tz_cookie && $datetime_class) {
4017                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4018                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4019                }
4020                print qq!};\n!.
4021                      qq!</script>\n!;
4022        }
4023
4024        print "</body>\n" .
4025              "</html>";
4026}
4027
4028# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4029# Example: die_error(404, 'Hash not found')
4030# By convention, use the following status codes (as defined in RFC 2616):
4031# 400: Invalid or missing CGI parameters, or
4032#      requested object exists but has wrong type.
4033# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4034#      this server or project.
4035# 404: Requested object/revision/project doesn't exist.
4036# 500: The server isn't configured properly, or
4037#      an internal error occurred (e.g. failed assertions caused by bugs), or
4038#      an unknown error occurred (e.g. the git binary died unexpectedly).
4039# 503: The server is currently unavailable (because it is overloaded,
4040#      or down for maintenance).  Generally, this is a temporary state.
4041sub die_error {
4042        my $status = shift || 500;
4043        my $error = esc_html(shift) || "Internal Server Error";
4044        my $extra = shift;
4045        my %opts = @_;
4046
4047        my %http_responses = (
4048                400 => '400 Bad Request',
4049                403 => '403 Forbidden',
4050                404 => '404 Not Found',
4051                500 => '500 Internal Server Error',
4052                503 => '503 Service Unavailable',
4053        );
4054        git_header_html($http_responses{$status}, undef, %opts);
4055        print <<EOF;
4056<div class="page_body">
4057<br /><br />
4058$status - $error
4059<br />
4060EOF
4061        if (defined $extra) {
4062                print "<hr />\n" .
4063                      "$extra\n";
4064        }
4065        print "</div>\n";
4066
4067        git_footer_html();
4068        goto DONE_GITWEB
4069                unless ($opts{'-error_handler'});
4070}
4071
4072## ----------------------------------------------------------------------
4073## functions printing or outputting HTML: navigation
4074
4075sub git_print_page_nav {
4076        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4077        $extra = '' if !defined $extra; # pager or formats
4078
4079        my @navs = qw(summary shortlog log commit commitdiff tree);
4080        if ($suppress) {
4081                @navs = grep { $_ ne $suppress } @navs;
4082        }
4083
4084        my %arg = map { $_ => {action=>$_} } @navs;
4085        if (defined $head) {
4086                for (qw(commit commitdiff)) {
4087                        $arg{$_}{'hash'} = $head;
4088                }
4089                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4090                        for (qw(shortlog log)) {
4091                                $arg{$_}{'hash'} = $head;
4092                        }
4093                }
4094        }
4095
4096        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4097        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4098
4099        my @actions = gitweb_get_feature('actions');
4100        my %repl = (
4101                '%' => '%',
4102                'n' => $project,         # project name
4103                'f' => $git_dir,         # project path within filesystem
4104                'h' => $treehead || '',  # current hash ('h' parameter)
4105                'b' => $treebase || '',  # hash base ('hb' parameter)
4106        );
4107        while (@actions) {
4108                my ($label, $link, $pos) = splice(@actions,0,3);
4109                # insert
4110                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4111                # munch munch
4112                $link =~ s/%([%nfhb])/$repl{$1}/g;
4113                $arg{$label}{'_href'} = $link;
4114        }
4115
4116        print "<div class=\"page_nav\">\n" .
4117                (join " | ",
4118                 map { $_ eq $current ?
4119                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4120                 } @navs);
4121        print "<br/>\n$extra<br/>\n" .
4122              "</div>\n";
4123}
4124
4125# returns a submenu for the nagivation of the refs views (tags, heads,
4126# remotes) with the current view disabled and the remotes view only
4127# available if the feature is enabled
4128sub format_ref_views {
4129        my ($current) = @_;
4130        my @ref_views = qw{tags heads};
4131        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4132        return join " | ", map {
4133                $_ eq $current ? $_ :
4134                $cgi->a({-href => href(action=>$_)}, $_)
4135        } @ref_views
4136}
4137
4138sub format_paging_nav {
4139        my ($action, $page, $has_next_link) = @_;
4140        my $paging_nav;
4141
4142
4143        if ($page > 0) {
4144                $paging_nav .=
4145                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4146                        " &sdot; " .
4147                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4148                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4149        } else {
4150                $paging_nav .= "first &sdot; prev";
4151        }
4152
4153        if ($has_next_link) {
4154                $paging_nav .= " &sdot; " .
4155                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4156                                 -accesskey => "n", -title => "Alt-n"}, "next");
4157        } else {
4158                $paging_nav .= " &sdot; next";
4159        }
4160
4161        return $paging_nav;
4162}
4163
4164## ......................................................................
4165## functions printing or outputting HTML: div
4166
4167sub git_print_header_div {
4168        my ($action, $title, $hash, $hash_base) = @_;
4169        my %args = ();
4170
4171        $args{'action'} = $action;
4172        $args{'hash'} = $hash if $hash;
4173        $args{'hash_base'} = $hash_base if $hash_base;
4174
4175        print "<div class=\"header\">\n" .
4176              $cgi->a({-href => href(%args), -class => "title"},
4177              $title ? $title : $action) .
4178              "\n</div>\n";
4179}
4180
4181sub format_repo_url {
4182        my ($name, $url) = @_;
4183        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4184}
4185
4186# Group output by placing it in a DIV element and adding a header.
4187# Options for start_div() can be provided by passing a hash reference as the
4188# first parameter to the function.
4189# Options to git_print_header_div() can be provided by passing an array
4190# reference. This must follow the options to start_div if they are present.
4191# The content can be a scalar, which is output as-is, a scalar reference, which
4192# is output after html escaping, an IO handle passed either as *handle or
4193# *handle{IO}, or a function reference. In the latter case all following
4194# parameters will be taken as argument to the content function call.
4195sub git_print_section {
4196        my ($div_args, $header_args, $content);
4197        my $arg = shift;
4198        if (ref($arg) eq 'HASH') {
4199                $div_args = $arg;
4200                $arg = shift;
4201        }
4202        if (ref($arg) eq 'ARRAY') {
4203                $header_args = $arg;
4204                $arg = shift;
4205        }
4206        $content = $arg;
4207
4208        print $cgi->start_div($div_args);
4209        git_print_header_div(@$header_args);
4210
4211        if (ref($content) eq 'CODE') {
4212                $content->(@_);
4213        } elsif (ref($content) eq 'SCALAR') {
4214                print esc_html($$content);
4215        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4216                print <$content>;
4217        } elsif (!ref($content) && defined($content)) {
4218                print $content;
4219        }
4220
4221        print $cgi->end_div;
4222}
4223
4224sub format_timestamp_html {
4225        my $date = shift;
4226        my $strtime = $date->{'rfc2822'};
4227
4228        my (undef, undef, $datetime_class) =
4229                gitweb_get_feature('javascript-timezone');
4230        if ($datetime_class) {
4231                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4232        }
4233
4234        my $localtime_format = '(%02d:%02d %s)';
4235        if ($date->{'hour_local'} < 6) {
4236                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4237        }
4238        $strtime .= ' ' .
4239                    sprintf($localtime_format,
4240                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4241
4242        return $strtime;
4243}
4244
4245# Outputs the author name and date in long form
4246sub git_print_authorship {
4247        my $co = shift;
4248        my %opts = @_;
4249        my $tag = $opts{-tag} || 'div';
4250        my $author = $co->{'author_name'};
4251
4252        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4253        print "<$tag class=\"author_date\">" .
4254              format_search_author($author, "author", esc_html($author)) .
4255              " [".format_timestamp_html(\%ad)."]".
4256              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4257              "</$tag>\n";
4258}
4259
4260# Outputs table rows containing the full author or committer information,
4261# in the format expected for 'commit' view (& similar).
4262# Parameters are a commit hash reference, followed by the list of people
4263# to output information for. If the list is empty it defaults to both
4264# author and committer.
4265sub git_print_authorship_rows {
4266        my $co = shift;
4267        # too bad we can't use @people = @_ || ('author', 'committer')
4268        my @people = @_;
4269        @people = ('author', 'committer') unless @people;
4270        foreach my $who (@people) {
4271                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4272                print "<tr><td>$who</td><td>" .
4273                      format_search_author($co->{"${who}_name"}, $who,
4274                                           esc_html($co->{"${who}_name"})) . " " .
4275                      format_search_author($co->{"${who}_email"}, $who,
4276                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4277                      "</td><td rowspan=\"2\">" .
4278                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4279                      "</td></tr>\n" .
4280                      "<tr>" .
4281                      "<td></td><td>" .
4282                      format_timestamp_html(\%wd) .
4283                      "</td>" .
4284                      "</tr>\n";
4285        }
4286}
4287
4288sub git_print_page_path {
4289        my $name = shift;
4290        my $type = shift;
4291        my $hb = shift;
4292
4293
4294        print "<div class=\"page_path\">";
4295        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4296                      -title => 'tree root'}, to_utf8("[$project]"));
4297        print " / ";
4298        if (defined $name) {
4299                my @dirname = split '/', $name;
4300                my $basename = pop @dirname;
4301                my $fullname = '';
4302
4303                foreach my $dir (@dirname) {
4304                        $fullname .= ($fullname ? '/' : '') . $dir;
4305                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4306                                                     hash_base=>$hb),
4307                                      -title => $fullname}, esc_path($dir));
4308                        print " / ";
4309                }
4310                if (defined $type && $type eq 'blob') {
4311                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4312                                                     hash_base=>$hb),
4313                                      -title => $name}, esc_path($basename));
4314                } elsif (defined $type && $type eq 'tree') {
4315                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4316                                                     hash_base=>$hb),
4317                                      -title => $name}, esc_path($basename));
4318                        print " / ";
4319                } else {
4320                        print esc_path($basename);
4321                }
4322        }
4323        print "<br/></div>\n";
4324}
4325
4326sub git_print_log {
4327        my $log = shift;
4328        my %opts = @_;
4329
4330        if ($opts{'-remove_title'}) {
4331                # remove title, i.e. first line of log
4332                shift @$log;
4333        }
4334        # remove leading empty lines
4335        while (defined $log->[0] && $log->[0] eq "") {
4336                shift @$log;
4337        }
4338
4339        # print log
4340        my $signoff = 0;
4341        my $empty = 0;
4342        foreach my $line (@$log) {
4343                if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4344                        $signoff = 1;
4345                        $empty = 0;
4346                        if (! $opts{'-remove_signoff'}) {
4347                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4348                                next;
4349                        } else {
4350                                # remove signoff lines
4351                                next;
4352                        }
4353                } else {
4354                        $signoff = 0;
4355                }
4356
4357                # print only one empty line
4358                # do not print empty line after signoff
4359                if ($line eq "") {
4360                        next if ($empty || $signoff);
4361                        $empty = 1;
4362                } else {
4363                        $empty = 0;
4364                }
4365
4366                print format_log_line_html($line) . "<br/>\n";
4367        }
4368
4369        if ($opts{'-final_empty_line'}) {
4370                # end with single empty line
4371                print "<br/>\n" unless $empty;
4372        }
4373}
4374
4375# return link target (what link points to)
4376sub git_get_link_target {
4377        my $hash = shift;
4378        my $link_target;
4379
4380        # read link
4381        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4382                or return;
4383        {
4384                local $/ = undef;
4385                $link_target = <$fd>;
4386        }
4387        close $fd
4388                or return;
4389
4390        return $link_target;
4391}
4392
4393# given link target, and the directory (basedir) the link is in,
4394# return target of link relative to top directory (top tree);
4395# return undef if it is not possible (including absolute links).
4396sub normalize_link_target {
4397        my ($link_target, $basedir) = @_;
4398
4399        # absolute symlinks (beginning with '/') cannot be normalized
4400        return if (substr($link_target, 0, 1) eq '/');
4401
4402        # normalize link target to path from top (root) tree (dir)
4403        my $path;
4404        if ($basedir) {
4405                $path = $basedir . '/' . $link_target;
4406        } else {
4407                # we are in top (root) tree (dir)
4408                $path = $link_target;
4409        }
4410
4411        # remove //, /./, and /../
4412        my @path_parts;
4413        foreach my $part (split('/', $path)) {
4414                # discard '.' and ''
4415                next if (!$part || $part eq '.');
4416                # handle '..'
4417                if ($part eq '..') {
4418                        if (@path_parts) {
4419                                pop @path_parts;
4420                        } else {
4421                                # link leads outside repository (outside top dir)
4422                                return;
4423                        }
4424                } else {
4425                        push @path_parts, $part;
4426                }
4427        }
4428        $path = join('/', @path_parts);
4429
4430        return $path;
4431}
4432
4433# print tree entry (row of git_tree), but without encompassing <tr> element
4434sub git_print_tree_entry {
4435        my ($t, $basedir, $hash_base, $have_blame) = @_;
4436
4437        my %base_key = ();
4438        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4439
4440        # The format of a table row is: mode list link.  Where mode is
4441        # the mode of the entry, list is the name of the entry, an href,
4442        # and link is the action links of the entry.
4443
4444        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4445        if (exists $t->{'size'}) {
4446                print "<td class=\"size\">$t->{'size'}</td>\n";
4447        }
4448        if ($t->{'type'} eq "blob") {
4449                print "<td class=\"list\">" .
4450                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4451                                               file_name=>"$basedir$t->{'name'}", %base_key),
4452                                -class => "list"}, esc_path($t->{'name'}));
4453                if (S_ISLNK(oct $t->{'mode'})) {
4454                        my $link_target = git_get_link_target($t->{'hash'});
4455                        if ($link_target) {
4456                                my $norm_target = normalize_link_target($link_target, $basedir);
4457                                if (defined $norm_target) {
4458                                        print " -> " .
4459                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4460                                                                     file_name=>$norm_target),
4461                                                       -title => $norm_target}, esc_path($link_target));
4462                                } else {
4463                                        print " -> " . esc_path($link_target);
4464                                }
4465                        }
4466                }
4467                print "</td>\n";
4468                print "<td class=\"link\">";
4469                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4470                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4471                              "blob");
4472                if ($have_blame) {
4473                        print " | " .
4474                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4475                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4476                                      "blame");
4477                }
4478                if (defined $hash_base) {
4479                        print " | " .
4480                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4481                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4482                                      "history");
4483                }
4484                print " | " .
4485                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4486                                               file_name=>"$basedir$t->{'name'}")},
4487                                "raw");
4488                print "</td>\n";
4489
4490        } elsif ($t->{'type'} eq "tree") {
4491                print "<td class=\"list\">";
4492                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4493                                             file_name=>"$basedir$t->{'name'}",
4494                                             %base_key)},
4495                              esc_path($t->{'name'}));
4496                print "</td>\n";
4497                print "<td class=\"link\">";
4498                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4499                                             file_name=>"$basedir$t->{'name'}",
4500                                             %base_key)},
4501                              "tree");
4502                if (defined $hash_base) {
4503                        print " | " .
4504                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4505                                                     file_name=>"$basedir$t->{'name'}")},
4506                                      "history");
4507                }
4508                print "</td>\n";
4509        } else {
4510                # unknown object: we can only present history for it
4511                # (this includes 'commit' object, i.e. submodule support)
4512                print "<td class=\"list\">" .
4513                      esc_path($t->{'name'}) .
4514                      "</td>\n";
4515                print "<td class=\"link\">";
4516                if (defined $hash_base) {
4517                        print $cgi->a({-href => href(action=>"history",
4518                                                     hash_base=>$hash_base,
4519                                                     file_name=>"$basedir$t->{'name'}")},
4520                                      "history");
4521                }
4522                print "</td>\n";
4523        }
4524}
4525
4526## ......................................................................
4527## functions printing large fragments of HTML
4528
4529# get pre-image filenames for merge (combined) diff
4530sub fill_from_file_info {
4531        my ($diff, @parents) = @_;
4532
4533        $diff->{'from_file'} = [ ];
4534        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4535        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4536                if ($diff->{'status'}[$i] eq 'R' ||
4537                    $diff->{'status'}[$i] eq 'C') {
4538                        $diff->{'from_file'}[$i] =
4539                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4540                }
4541        }
4542
4543        return $diff;
4544}
4545
4546# is current raw difftree line of file deletion
4547sub is_deleted {
4548        my $diffinfo = shift;
4549
4550        return $diffinfo->{'to_id'} eq ('0' x 40);
4551}
4552
4553# does patch correspond to [previous] difftree raw line
4554# $diffinfo  - hashref of parsed raw diff format
4555# $patchinfo - hashref of parsed patch diff format
4556#              (the same keys as in $diffinfo)
4557sub is_patch_split {
4558        my ($diffinfo, $patchinfo) = @_;
4559
4560        return defined $diffinfo && defined $patchinfo
4561                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4562}
4563
4564
4565sub git_difftree_body {
4566        my ($difftree, $hash, @parents) = @_;
4567        my ($parent) = $parents[0];
4568        my $have_blame = gitweb_check_feature('blame');
4569        print "<div class=\"list_head\">\n";
4570        if ($#{$difftree} > 10) {
4571                print(($#{$difftree} + 1) . " files changed:\n");
4572        }
4573        print "</div>\n";
4574
4575        print "<table class=\"" .
4576              (@parents > 1 ? "combined " : "") .
4577              "diff_tree\">\n";
4578
4579        # header only for combined diff in 'commitdiff' view
4580        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4581        if ($has_header) {
4582                # table header
4583                print "<thead><tr>\n" .
4584                       "<th></th><th></th>\n"; # filename, patchN link
4585                for (my $i = 0; $i < @parents; $i++) {
4586                        my $par = $parents[$i];
4587                        print "<th>" .
4588                              $cgi->a({-href => href(action=>"commitdiff",
4589                                                     hash=>$hash, hash_parent=>$par),
4590                                       -title => 'commitdiff to parent number ' .
4591                                                  ($i+1) . ': ' . substr($par,0,7)},
4592                                      $i+1) .
4593                              "&nbsp;</th>\n";
4594                }
4595                print "</tr></thead>\n<tbody>\n";
4596        }
4597
4598        my $alternate = 1;
4599        my $patchno = 0;
4600        foreach my $line (@{$difftree}) {
4601                my $diff = parsed_difftree_line($line);
4602
4603                if ($alternate) {
4604                        print "<tr class=\"dark\">\n";
4605                } else {
4606                        print "<tr class=\"light\">\n";
4607                }
4608                $alternate ^= 1;
4609
4610                if (exists $diff->{'nparents'}) { # combined diff
4611
4612                        fill_from_file_info($diff, @parents)
4613                                unless exists $diff->{'from_file'};
4614
4615                        if (!is_deleted($diff)) {
4616                                # file exists in the result (child) commit
4617                                print "<td>" .
4618                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4619                                                             file_name=>$diff->{'to_file'},
4620                                                             hash_base=>$hash),
4621                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4622                                      "</td>\n";
4623                        } else {
4624                                print "<td>" .
4625                                      esc_path($diff->{'to_file'}) .
4626                                      "</td>\n";
4627                        }
4628
4629                        if ($action eq 'commitdiff') {
4630                                # link to patch
4631                                $patchno++;
4632                                print "<td class=\"link\">" .
4633                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4634                                              "patch") .
4635                                      " | " .
4636                                      "</td>\n";
4637                        }
4638
4639                        my $has_history = 0;
4640                        my $not_deleted = 0;
4641                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4642                                my $hash_parent = $parents[$i];
4643                                my $from_hash = $diff->{'from_id'}[$i];
4644                                my $from_path = $diff->{'from_file'}[$i];
4645                                my $status = $diff->{'status'}[$i];
4646
4647                                $has_history ||= ($status ne 'A');
4648                                $not_deleted ||= ($status ne 'D');
4649
4650                                if ($status eq 'A') {
4651                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4652                                } elsif ($status eq 'D') {
4653                                        print "<td class=\"link\">" .
4654                                              $cgi->a({-href => href(action=>"blob",
4655                                                                     hash_base=>$hash,
4656                                                                     hash=>$from_hash,
4657                                                                     file_name=>$from_path)},
4658                                                      "blob" . ($i+1)) .
4659                                              " | </td>\n";
4660                                } else {
4661                                        if ($diff->{'to_id'} eq $from_hash) {
4662                                                print "<td class=\"link nochange\">";
4663                                        } else {
4664                                                print "<td class=\"link\">";
4665                                        }
4666                                        print $cgi->a({-href => href(action=>"blobdiff",
4667                                                                     hash=>$diff->{'to_id'},
4668                                                                     hash_parent=>$from_hash,
4669                                                                     hash_base=>$hash,
4670                                                                     hash_parent_base=>$hash_parent,
4671                                                                     file_name=>$diff->{'to_file'},
4672                                                                     file_parent=>$from_path)},
4673                                                      "diff" . ($i+1)) .
4674                                              " | </td>\n";
4675                                }
4676                        }
4677
4678                        print "<td class=\"link\">";
4679                        if ($not_deleted) {
4680                                print $cgi->a({-href => href(action=>"blob",
4681                                                             hash=>$diff->{'to_id'},
4682                                                             file_name=>$diff->{'to_file'},
4683                                                             hash_base=>$hash)},
4684                                              "blob");
4685                                print " | " if ($has_history);
4686                        }
4687                        if ($has_history) {
4688                                print $cgi->a({-href => href(action=>"history",
4689                                                             file_name=>$diff->{'to_file'},
4690                                                             hash_base=>$hash)},
4691                                              "history");
4692                        }
4693                        print "</td>\n";
4694
4695                        print "</tr>\n";
4696                        next; # instead of 'else' clause, to avoid extra indent
4697                }
4698                # else ordinary diff
4699
4700                my ($to_mode_oct, $to_mode_str, $to_file_type);
4701                my ($from_mode_oct, $from_mode_str, $from_file_type);
4702                if ($diff->{'to_mode'} ne ('0' x 6)) {
4703                        $to_mode_oct = oct $diff->{'to_mode'};
4704                        if (S_ISREG($to_mode_oct)) { # only for regular file
4705                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4706                        }
4707                        $to_file_type = file_type($diff->{'to_mode'});
4708                }
4709                if ($diff->{'from_mode'} ne ('0' x 6)) {
4710                        $from_mode_oct = oct $diff->{'from_mode'};
4711                        if (S_ISREG($from_mode_oct)) { # only for regular file
4712                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4713                        }
4714                        $from_file_type = file_type($diff->{'from_mode'});
4715                }
4716
4717                if ($diff->{'status'} eq "A") { # created
4718                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4719                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4720                        $mode_chng   .= "]</span>";
4721                        print "<td>";
4722                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4723                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4724                                      -class => "list"}, esc_path($diff->{'file'}));
4725                        print "</td>\n";
4726                        print "<td>$mode_chng</td>\n";
4727                        print "<td class=\"link\">";
4728                        if ($action eq 'commitdiff') {
4729                                # link to patch
4730                                $patchno++;
4731                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4732                                              "patch") .
4733                                      " | ";
4734                        }
4735                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4736                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4737                                      "blob");
4738                        print "</td>\n";
4739
4740                } elsif ($diff->{'status'} eq "D") { # deleted
4741                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4742                        print "<td>";
4743                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4744                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4745                                       -class => "list"}, esc_path($diff->{'file'}));
4746                        print "</td>\n";
4747                        print "<td>$mode_chng</td>\n";
4748                        print "<td class=\"link\">";
4749                        if ($action eq 'commitdiff') {
4750                                # link to patch
4751                                $patchno++;
4752                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4753                                              "patch") .
4754                                      " | ";
4755                        }
4756                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4757                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4758                                      "blob") . " | ";
4759                        if ($have_blame) {
4760                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4761                                                             file_name=>$diff->{'file'})},
4762                                              "blame") . " | ";
4763                        }
4764                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4765                                                     file_name=>$diff->{'file'})},
4766                                      "history");
4767                        print "</td>\n";
4768
4769                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4770                        my $mode_chnge = "";
4771                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4772                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4773                                if ($from_file_type ne $to_file_type) {
4774                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4775                                }
4776                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4777                                        if ($from_mode_str && $to_mode_str) {
4778                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4779                                        } elsif ($to_mode_str) {
4780                                                $mode_chnge .= " mode: $to_mode_str";
4781                                        }
4782                                }
4783                                $mode_chnge .= "]</span>\n";
4784                        }
4785                        print "<td>";
4786                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4787                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4788                                      -class => "list"}, esc_path($diff->{'file'}));
4789                        print "</td>\n";
4790                        print "<td>$mode_chnge</td>\n";
4791                        print "<td class=\"link\">";
4792                        if ($action eq 'commitdiff') {
4793                                # link to patch
4794                                $patchno++;
4795                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4796                                              "patch") .
4797                                      " | ";
4798                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4799                                # "commit" view and modified file (not onlu mode changed)
4800                                print $cgi->a({-href => href(action=>"blobdiff",
4801                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4802                                                             hash_base=>$hash, hash_parent_base=>$parent,
4803                                                             file_name=>$diff->{'file'})},
4804                                              "diff") .
4805                                      " | ";
4806                        }
4807                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4808                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4809                                       "blob") . " | ";
4810                        if ($have_blame) {
4811                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4812                                                             file_name=>$diff->{'file'})},
4813                                              "blame") . " | ";
4814                        }
4815                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4816                                                     file_name=>$diff->{'file'})},
4817                                      "history");
4818                        print "</td>\n";
4819
4820                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4821                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4822                        my $nstatus = $status_name{$diff->{'status'}};
4823                        my $mode_chng = "";
4824                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4825                                # mode also for directories, so we cannot use $to_mode_str
4826                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4827                        }
4828                        print "<td>" .
4829                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4830                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4831                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4832                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4833                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4834                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4835                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4836                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4837                              "<td class=\"link\">";
4838                        if ($action eq 'commitdiff') {
4839                                # link to patch
4840                                $patchno++;
4841                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4842                                              "patch") .
4843                                      " | ";
4844                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4845                                # "commit" view and modified file (not only pure rename or copy)
4846                                print $cgi->a({-href => href(action=>"blobdiff",
4847                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4848                                                             hash_base=>$hash, hash_parent_base=>$parent,
4849                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4850                                              "diff") .
4851                                      " | ";
4852                        }
4853                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4854                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
4855                                      "blob") . " | ";
4856                        if ($have_blame) {
4857                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4858                                                             file_name=>$diff->{'to_file'})},
4859                                              "blame") . " | ";
4860                        }
4861                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4862                                                    file_name=>$diff->{'to_file'})},
4863                                      "history");
4864                        print "</td>\n";
4865
4866                } # we should not encounter Unmerged (U) or Unknown (X) status
4867                print "</tr>\n";
4868        }
4869        print "</tbody>" if $has_header;
4870        print "</table>\n";
4871}
4872
4873sub print_sidebyside_diff_chunk {
4874        my @chunk = @_;
4875        my (@ctx, @rem, @add);
4876
4877        return unless @chunk;
4878
4879        # incomplete last line might be among removed or added lines,
4880        # or both, or among context lines: find which
4881        for (my $i = 1; $i < @chunk; $i++) {
4882                if ($chunk[$i][0] eq 'incomplete') {
4883                        $chunk[$i][0] = $chunk[$i-1][0];
4884                }
4885        }
4886
4887        # guardian
4888        push @chunk, ["", ""];
4889
4890        foreach my $line_info (@chunk) {
4891                my ($class, $line) = @$line_info;
4892
4893                # print chunk headers
4894                if ($class && $class eq 'chunk_header') {
4895                        print $line;
4896                        next;
4897                }
4898
4899                ## print from accumulator when type of class of lines change
4900                # empty contents block on start rem/add block, or end of chunk
4901                if (@ctx && (!$class || $class eq 'rem' || $class eq 'add')) {
4902                        print join '',
4903                                '<div class="chunk_block ctx">',
4904                                        '<div class="old">',
4905                                        @ctx,
4906                                        '</div>',
4907                                        '<div class="new">',
4908                                        @ctx,
4909                                        '</div>',
4910                                '</div>';
4911                        @ctx = ();
4912                }
4913                # empty add/rem block on start context block, or end of chunk
4914                if ((@rem || @add) && (!$class || $class eq 'ctx')) {
4915                        if (!@add) {
4916                                # pure removal
4917                                print join '',
4918                                        '<div class="chunk_block rem">',
4919                                                '<div class="old">',
4920                                                @rem,
4921                                                '</div>',
4922                                        '</div>';
4923                        } elsif (!@rem) {
4924                                # pure addition
4925                                print join '',
4926                                        '<div class="chunk_block add">',
4927                                                '<div class="new">',
4928                                                @add,
4929                                                '</div>',
4930                                        '</div>';
4931                        } else {
4932                                # assume that it is change
4933                                print join '',
4934                                        '<div class="chunk_block chg">',
4935                                                '<div class="old">',
4936                                                @rem,
4937                                                '</div>',
4938                                                '<div class="new">',
4939                                                @add,
4940                                                '</div>',
4941                                        '</div>';
4942                        }
4943                        @rem = @add = ();
4944                }
4945
4946                ## adding lines to accumulator
4947                # guardian value
4948                last unless $line;
4949                # rem, add or change
4950                if ($class eq 'rem') {
4951                        push @rem, $line;
4952                } elsif ($class eq 'add') {
4953                        push @add, $line;
4954                }
4955                # context line
4956                if ($class eq 'ctx') {
4957                        push @ctx, $line;
4958                }
4959        }
4960}
4961
4962sub git_patchset_body {
4963        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
4964        my ($hash_parent) = $hash_parents[0];
4965
4966        my $is_combined = (@hash_parents > 1);
4967        my $patch_idx = 0;
4968        my $patch_number = 0;
4969        my $patch_line;
4970        my $diffinfo;
4971        my $to_name;
4972        my (%from, %to);
4973        my @chunk; # for side-by-side diff
4974
4975        print "<div class=\"patchset\">\n";
4976
4977        # skip to first patch
4978        while ($patch_line = <$fd>) {
4979                chomp $patch_line;
4980
4981                last if ($patch_line =~ m/^diff /);
4982        }
4983
4984 PATCH:
4985        while ($patch_line) {
4986
4987                # parse "git diff" header line
4988                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4989                        # $1 is from_name, which we do not use
4990                        $to_name = unquote($2);
4991                        $to_name =~ s!^b/!!;
4992                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4993                        # $1 is 'cc' or 'combined', which we do not use
4994                        $to_name = unquote($2);
4995                } else {
4996                        $to_name = undef;
4997                }
4998
4999                # check if current patch belong to current raw line
5000                # and parse raw git-diff line if needed
5001                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5002                        # this is continuation of a split patch
5003                        print "<div class=\"patch cont\">\n";
5004                } else {
5005                        # advance raw git-diff output if needed
5006                        $patch_idx++ if defined $diffinfo;
5007
5008                        # read and prepare patch information
5009                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5010
5011                        # compact combined diff output can have some patches skipped
5012                        # find which patch (using pathname of result) we are at now;
5013                        if ($is_combined) {
5014                                while ($to_name ne $diffinfo->{'to_file'}) {
5015                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5016                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5017                                              "</div>\n";  # class="patch"
5018
5019                                        $patch_idx++;
5020                                        $patch_number++;
5021
5022                                        last if $patch_idx > $#$difftree;
5023                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5024                                }
5025                        }
5026
5027                        # modifies %from, %to hashes
5028                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5029
5030                        # this is first patch for raw difftree line with $patch_idx index
5031                        # we index @$difftree array from 0, but number patches from 1
5032                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5033                }
5034
5035                # git diff header
5036                #assert($patch_line =~ m/^diff /) if DEBUG;
5037                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5038                $patch_number++;
5039                # print "git diff" header
5040                print format_git_diff_header_line($patch_line, $diffinfo,
5041                                                  \%from, \%to);
5042
5043                # print extended diff header
5044                print "<div class=\"diff extended_header\">\n";
5045        EXTENDED_HEADER:
5046                while ($patch_line = <$fd>) {
5047                        chomp $patch_line;
5048
5049                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5050
5051                        print format_extended_diff_header_line($patch_line, $diffinfo,
5052                                                               \%from, \%to);
5053                }
5054                print "</div>\n"; # class="diff extended_header"
5055
5056                # from-file/to-file diff header
5057                if (! $patch_line) {
5058                        print "</div>\n"; # class="patch"
5059                        last PATCH;
5060                }
5061                next PATCH if ($patch_line =~ m/^diff /);
5062                #assert($patch_line =~ m/^---/) if DEBUG;
5063
5064                my $last_patch_line = $patch_line;
5065                $patch_line = <$fd>;
5066                chomp $patch_line;
5067                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5068
5069                print format_diff_from_to_header($last_patch_line, $patch_line,
5070                                                 $diffinfo, \%from, \%to,
5071                                                 @hash_parents);
5072
5073                # the patch itself
5074        LINE:
5075                while ($patch_line = <$fd>) {
5076                        chomp $patch_line;
5077
5078                        next PATCH if ($patch_line =~ m/^diff /);
5079
5080                        my ($class, $line) = process_diff_line($patch_line, \%from, \%to);
5081                        my $diff_classes = "diff";
5082                        $diff_classes .= " $class" if ($class);
5083                        $line = "<div class=\"$diff_classes\">$line</div>\n";
5084
5085                        if ($diff_style eq 'sidebyside' && !$is_combined) {
5086                                if ($class eq 'chunk_header') {
5087                                        print_sidebyside_diff_chunk(@chunk);
5088                                        @chunk = ( [ $class, $line ] );
5089                                } else {
5090                                        push @chunk, [ $class, $line ];
5091                                }
5092                        } else {
5093                                # default 'inline' style and unknown styles
5094                                print $line;
5095                        }
5096                }
5097
5098        } continue {
5099                if (@chunk) {
5100                        print_sidebyside_diff_chunk(@chunk);
5101                        @chunk = ();
5102                }
5103                print "</div>\n"; # class="patch"
5104        }
5105
5106        # for compact combined (--cc) format, with chunk and patch simplification
5107        # the patchset might be empty, but there might be unprocessed raw lines
5108        for (++$patch_idx if $patch_number > 0;
5109             $patch_idx < @$difftree;
5110             ++$patch_idx) {
5111                # read and prepare patch information
5112                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5113
5114                # generate anchor for "patch" links in difftree / whatchanged part
5115                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5116                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5117                      "</div>\n";  # class="patch"
5118
5119                $patch_number++;
5120        }
5121
5122        if ($patch_number == 0) {
5123                if (@hash_parents > 1) {
5124                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5125                } else {
5126                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5127                }
5128        }
5129
5130        print "</div>\n"; # class="patchset"
5131}
5132
5133# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5134
5135# fills project list info (age, description, owner, category, forks)
5136# for each project in the list, removing invalid projects from
5137# returned list
5138# NOTE: modifies $projlist, but does not remove entries from it
5139sub fill_project_list_info {
5140        my $projlist = shift;
5141        my @projects;
5142
5143        my $show_ctags = gitweb_check_feature('ctags');
5144 PROJECT:
5145        foreach my $pr (@$projlist) {
5146                my (@activity) = git_get_last_activity($pr->{'path'});
5147                unless (@activity) {
5148                        next PROJECT;
5149                }
5150                ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5151                if (!defined $pr->{'descr'}) {
5152                        my $descr = git_get_project_description($pr->{'path'}) || "";
5153                        $descr = to_utf8($descr);
5154                        $pr->{'descr_long'} = $descr;
5155                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5156                }
5157                if (!defined $pr->{'owner'}) {
5158                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5159                }
5160                if ($show_ctags) {
5161                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5162                }
5163                if ($projects_list_group_categories && !defined $pr->{'category'}) {
5164                        my $cat = git_get_project_category($pr->{'path'}) ||
5165                                                           $project_list_default_category;
5166                        $pr->{'category'} = to_utf8($cat);
5167                }
5168
5169                push @projects, $pr;
5170        }
5171
5172        return @projects;
5173}
5174
5175sub sort_projects_list {
5176        my ($projlist, $order) = @_;
5177        my @projects;
5178
5179        my %order_info = (
5180                project => { key => 'path', type => 'str' },
5181                descr => { key => 'descr_long', type => 'str' },
5182                owner => { key => 'owner', type => 'str' },
5183                age => { key => 'age', type => 'num' }
5184        );
5185        my $oi = $order_info{$order};
5186        return @$projlist unless defined $oi;
5187        if ($oi->{'type'} eq 'str') {
5188                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5189        } else {
5190                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5191        }
5192
5193        return @projects;
5194}
5195
5196# returns a hash of categories, containing the list of project
5197# belonging to each category
5198sub build_projlist_by_category {
5199        my ($projlist, $from, $to) = @_;
5200        my %categories;
5201
5202        $from = 0 unless defined $from;
5203        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5204
5205        for (my $i = $from; $i <= $to; $i++) {
5206                my $pr = $projlist->[$i];
5207                push @{$categories{ $pr->{'category'} }}, $pr;
5208        }
5209
5210        return wantarray ? %categories : \%categories;
5211}
5212
5213# print 'sort by' <th> element, generating 'sort by $name' replay link
5214# if that order is not selected
5215sub print_sort_th {
5216        print format_sort_th(@_);
5217}
5218
5219sub format_sort_th {
5220        my ($name, $order, $header) = @_;
5221        my $sort_th = "";
5222        $header ||= ucfirst($name);
5223
5224        if ($order eq $name) {
5225                $sort_th .= "<th>$header</th>\n";
5226        } else {
5227                $sort_th .= "<th>" .
5228                            $cgi->a({-href => href(-replay=>1, order=>$name),
5229                                     -class => "header"}, $header) .
5230                            "</th>\n";
5231        }
5232
5233        return $sort_th;
5234}
5235
5236sub git_project_list_rows {
5237        my ($projlist, $from, $to, $check_forks) = @_;
5238
5239        $from = 0 unless defined $from;
5240        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5241
5242        my $alternate = 1;
5243        for (my $i = $from; $i <= $to; $i++) {
5244                my $pr = $projlist->[$i];
5245
5246                if ($alternate) {
5247                        print "<tr class=\"dark\">\n";
5248                } else {
5249                        print "<tr class=\"light\">\n";
5250                }
5251                $alternate ^= 1;
5252
5253                if ($check_forks) {
5254                        print "<td>";
5255                        if ($pr->{'forks'}) {
5256                                my $nforks = scalar @{$pr->{'forks'}};
5257                                if ($nforks > 0) {
5258                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5259                                                       -title => "$nforks forks"}, "+");
5260                                } else {
5261                                        print $cgi->span({-title => "$nforks forks"}, "+");
5262                                }
5263                        }
5264                        print "</td>\n";
5265                }
5266                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5267                                        -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5268                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5269                                        -class => "list", -title => $pr->{'descr_long'}},
5270                                        esc_html($pr->{'descr'})) . "</td>\n" .
5271                      "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5272                print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5273                      (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5274                      "<td class=\"link\">" .
5275                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5276                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5277                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5278                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5279                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5280                      "</td>\n" .
5281                      "</tr>\n";
5282        }
5283}
5284
5285sub git_project_list_body {
5286        # actually uses global variable $project
5287        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5288        my @projects = @$projlist;
5289
5290        my $check_forks = gitweb_check_feature('forks');
5291        my $show_ctags  = gitweb_check_feature('ctags');
5292        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5293        $check_forks = undef
5294                if ($tagfilter || $searchtext);
5295
5296        # filtering out forks before filling info allows to do less work
5297        @projects = filter_forks_from_projects_list(\@projects)
5298                if ($check_forks);
5299        @projects = fill_project_list_info(\@projects);
5300        # searching projects require filling to be run before it
5301        @projects = search_projects_list(\@projects,
5302                                         'searchtext' => $searchtext,
5303                                         'tagfilter'  => $tagfilter)
5304                if ($tagfilter || $searchtext);
5305
5306        $order ||= $default_projects_order;
5307        $from = 0 unless defined $from;
5308        $to = $#projects if (!defined $to || $#projects < $to);
5309
5310        # short circuit
5311        if ($from > $to) {
5312                print "<center>\n".
5313                      "<b>No such projects found</b><br />\n".
5314                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5315                      "</center>\n<br />\n";
5316                return;
5317        }
5318
5319        @projects = sort_projects_list(\@projects, $order);
5320
5321        if ($show_ctags) {
5322                my $ctags = git_gather_all_ctags(\@projects);
5323                my $cloud = git_populate_project_tagcloud($ctags);
5324                print git_show_project_tagcloud($cloud, 64);
5325        }
5326
5327        print "<table class=\"project_list\">\n";
5328        unless ($no_header) {
5329                print "<tr>\n";
5330                if ($check_forks) {
5331                        print "<th></th>\n";
5332                }
5333                print_sort_th('project', $order, 'Project');
5334                print_sort_th('descr', $order, 'Description');
5335                print_sort_th('owner', $order, 'Owner');
5336                print_sort_th('age', $order, 'Last Change');
5337                print "<th></th>\n" . # for links
5338                      "</tr>\n";
5339        }
5340
5341        if ($projects_list_group_categories) {
5342                # only display categories with projects in the $from-$to window
5343                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5344                my %categories = build_projlist_by_category(\@projects, $from, $to);
5345                foreach my $cat (sort keys %categories) {
5346                        unless ($cat eq "") {
5347                                print "<tr>\n";
5348                                if ($check_forks) {
5349                                        print "<td></td>\n";
5350                                }
5351                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5352                                print "</tr>\n";
5353                        }
5354
5355                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5356                }
5357        } else {
5358                git_project_list_rows(\@projects, $from, $to, $check_forks);
5359        }
5360
5361        if (defined $extra) {
5362                print "<tr>\n";
5363                if ($check_forks) {
5364                        print "<td></td>\n";
5365                }
5366                print "<td colspan=\"5\">$extra</td>\n" .
5367                      "</tr>\n";
5368        }
5369        print "</table>\n";
5370}
5371
5372sub git_log_body {
5373        # uses global variable $project
5374        my ($commitlist, $from, $to, $refs, $extra) = @_;
5375
5376        $from = 0 unless defined $from;
5377        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5378
5379        for (my $i = 0; $i <= $to; $i++) {
5380                my %co = %{$commitlist->[$i]};
5381                next if !%co;
5382                my $commit = $co{'id'};
5383                my $ref = format_ref_marker($refs, $commit);
5384                git_print_header_div('commit',
5385                               "<span class=\"age\">$co{'age_string'}</span>" .
5386                               esc_html($co{'title'}) . $ref,
5387                               $commit);
5388                print "<div class=\"title_text\">\n" .
5389                      "<div class=\"log_link\">\n" .
5390                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5391                      " | " .
5392                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5393                      " | " .
5394                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5395                      "<br/>\n" .
5396                      "</div>\n";
5397                      git_print_authorship(\%co, -tag => 'span');
5398                      print "<br/>\n</div>\n";
5399
5400                print "<div class=\"log_body\">\n";
5401                git_print_log($co{'comment'}, -final_empty_line=> 1);
5402                print "</div>\n";
5403        }
5404        if ($extra) {
5405                print "<div class=\"page_nav\">\n";
5406                print "$extra\n";
5407                print "</div>\n";
5408        }
5409}
5410
5411sub git_shortlog_body {
5412        # uses global variable $project
5413        my ($commitlist, $from, $to, $refs, $extra) = @_;
5414
5415        $from = 0 unless defined $from;
5416        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5417
5418        print "<table class=\"shortlog\">\n";
5419        my $alternate = 1;
5420        for (my $i = $from; $i <= $to; $i++) {
5421                my %co = %{$commitlist->[$i]};
5422                my $commit = $co{'id'};
5423                my $ref = format_ref_marker($refs, $commit);
5424                if ($alternate) {
5425                        print "<tr class=\"dark\">\n";
5426                } else {
5427                        print "<tr class=\"light\">\n";
5428                }
5429                $alternate ^= 1;
5430                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5431                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5432                      format_author_html('td', \%co, 10) . "<td>";
5433                print format_subject_html($co{'title'}, $co{'title_short'},
5434                                          href(action=>"commit", hash=>$commit), $ref);
5435                print "</td>\n" .
5436                      "<td class=\"link\">" .
5437                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5438                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5439                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5440                my $snapshot_links = format_snapshot_links($commit);
5441                if (defined $snapshot_links) {
5442                        print " | " . $snapshot_links;
5443                }
5444                print "</td>\n" .
5445                      "</tr>\n";
5446        }
5447        if (defined $extra) {
5448                print "<tr>\n" .
5449                      "<td colspan=\"4\">$extra</td>\n" .
5450                      "</tr>\n";
5451        }
5452        print "</table>\n";
5453}
5454
5455sub git_history_body {
5456        # Warning: assumes constant type (blob or tree) during history
5457        my ($commitlist, $from, $to, $refs, $extra,
5458            $file_name, $file_hash, $ftype) = @_;
5459
5460        $from = 0 unless defined $from;
5461        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5462
5463        print "<table class=\"history\">\n";
5464        my $alternate = 1;
5465        for (my $i = $from; $i <= $to; $i++) {
5466                my %co = %{$commitlist->[$i]};
5467                if (!%co) {
5468                        next;
5469                }
5470                my $commit = $co{'id'};
5471
5472                my $ref = format_ref_marker($refs, $commit);
5473
5474                if ($alternate) {
5475                        print "<tr class=\"dark\">\n";
5476                } else {
5477                        print "<tr class=\"light\">\n";
5478                }
5479                $alternate ^= 1;
5480                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5481        # shortlog:   format_author_html('td', \%co, 10)
5482                      format_author_html('td', \%co, 15, 3) . "<td>";
5483                # originally git_history used chop_str($co{'title'}, 50)
5484                print format_subject_html($co{'title'}, $co{'title_short'},
5485                                          href(action=>"commit", hash=>$commit), $ref);
5486                print "</td>\n" .
5487                      "<td class=\"link\">" .
5488                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5489                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5490
5491                if ($ftype eq 'blob') {
5492                        my $blob_current = $file_hash;
5493                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5494                        if (defined $blob_current && defined $blob_parent &&
5495                                        $blob_current ne $blob_parent) {
5496                                print " | " .
5497                                        $cgi->a({-href => href(action=>"blobdiff",
5498                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5499                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5500                                                               file_name=>$file_name)},
5501                                                "diff to current");
5502                        }
5503                }
5504                print "</td>\n" .
5505                      "</tr>\n";
5506        }
5507        if (defined $extra) {
5508                print "<tr>\n" .
5509                      "<td colspan=\"4\">$extra</td>\n" .
5510                      "</tr>\n";
5511        }
5512        print "</table>\n";
5513}
5514
5515sub git_tags_body {
5516        # uses global variable $project
5517        my ($taglist, $from, $to, $extra) = @_;
5518        $from = 0 unless defined $from;
5519        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5520
5521        print "<table class=\"tags\">\n";
5522        my $alternate = 1;
5523        for (my $i = $from; $i <= $to; $i++) {
5524                my $entry = $taglist->[$i];
5525                my %tag = %$entry;
5526                my $comment = $tag{'subject'};
5527                my $comment_short;
5528                if (defined $comment) {
5529                        $comment_short = chop_str($comment, 30, 5);
5530                }
5531                if ($alternate) {
5532                        print "<tr class=\"dark\">\n";
5533                } else {
5534                        print "<tr class=\"light\">\n";
5535                }
5536                $alternate ^= 1;
5537                if (defined $tag{'age'}) {
5538                        print "<td><i>$tag{'age'}</i></td>\n";
5539                } else {
5540                        print "<td></td>\n";
5541                }
5542                print "<td>" .
5543                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5544                               -class => "list name"}, esc_html($tag{'name'})) .
5545                      "</td>\n" .
5546                      "<td>";
5547                if (defined $comment) {
5548                        print format_subject_html($comment, $comment_short,
5549                                                  href(action=>"tag", hash=>$tag{'id'}));
5550                }
5551                print "</td>\n" .
5552                      "<td class=\"selflink\">";
5553                if ($tag{'type'} eq "tag") {
5554                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5555                } else {
5556                        print "&nbsp;";
5557                }
5558                print "</td>\n" .
5559                      "<td class=\"link\">" . " | " .
5560                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5561                if ($tag{'reftype'} eq "commit") {
5562                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5563                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5564                } elsif ($tag{'reftype'} eq "blob") {
5565                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5566                }
5567                print "</td>\n" .
5568                      "</tr>";
5569        }
5570        if (defined $extra) {
5571                print "<tr>\n" .
5572                      "<td colspan=\"5\">$extra</td>\n" .
5573                      "</tr>\n";
5574        }
5575        print "</table>\n";
5576}
5577
5578sub git_heads_body {
5579        # uses global variable $project
5580        my ($headlist, $head_at, $from, $to, $extra) = @_;
5581        $from = 0 unless defined $from;
5582        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5583
5584        print "<table class=\"heads\">\n";
5585        my $alternate = 1;
5586        for (my $i = $from; $i <= $to; $i++) {
5587                my $entry = $headlist->[$i];
5588                my %ref = %$entry;
5589                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5590                if ($alternate) {
5591                        print "<tr class=\"dark\">\n";
5592                } else {
5593                        print "<tr class=\"light\">\n";
5594                }
5595                $alternate ^= 1;
5596                print "<td><i>$ref{'age'}</i></td>\n" .
5597                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5598                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5599                               -class => "list name"},esc_html($ref{'name'})) .
5600                      "</td>\n" .
5601                      "<td class=\"link\">" .
5602                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5603                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5604                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5605                      "</td>\n" .
5606                      "</tr>";
5607        }
5608        if (defined $extra) {
5609                print "<tr>\n" .
5610                      "<td colspan=\"3\">$extra</td>\n" .
5611                      "</tr>\n";
5612        }
5613        print "</table>\n";
5614}
5615
5616# Display a single remote block
5617sub git_remote_block {
5618        my ($remote, $rdata, $limit, $head) = @_;
5619
5620        my $heads = $rdata->{'heads'};
5621        my $fetch = $rdata->{'fetch'};
5622        my $push = $rdata->{'push'};
5623
5624        my $urls_table = "<table class=\"projects_list\">\n" ;
5625
5626        if (defined $fetch) {
5627                if ($fetch eq $push) {
5628                        $urls_table .= format_repo_url("URL", $fetch);
5629                } else {
5630                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5631                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5632                }
5633        } elsif (defined $push) {
5634                $urls_table .= format_repo_url("Push URL", $push);
5635        } else {
5636                $urls_table .= format_repo_url("", "No remote URL");
5637        }
5638
5639        $urls_table .= "</table>\n";
5640
5641        my $dots;
5642        if (defined $limit && $limit < @$heads) {
5643                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5644        }
5645
5646        print $urls_table;
5647        git_heads_body($heads, $head, 0, $limit, $dots);
5648}
5649
5650# Display a list of remote names with the respective fetch and push URLs
5651sub git_remotes_list {
5652        my ($remotedata, $limit) = @_;
5653        print "<table class=\"heads\">\n";
5654        my $alternate = 1;
5655        my @remotes = sort keys %$remotedata;
5656
5657        my $limited = $limit && $limit < @remotes;
5658
5659        $#remotes = $limit - 1 if $limited;
5660
5661        while (my $remote = shift @remotes) {
5662                my $rdata = $remotedata->{$remote};
5663                my $fetch = $rdata->{'fetch'};
5664                my $push = $rdata->{'push'};
5665                if ($alternate) {
5666                        print "<tr class=\"dark\">\n";
5667                } else {
5668                        print "<tr class=\"light\">\n";
5669                }
5670                $alternate ^= 1;
5671                print "<td>" .
5672                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5673                               -class=> "list name"},esc_html($remote)) .
5674                      "</td>";
5675                print "<td class=\"link\">" .
5676                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5677                      " | " .
5678                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5679                      "</td>";
5680
5681                print "</tr>\n";
5682        }
5683
5684        if ($limited) {
5685                print "<tr>\n" .
5686                      "<td colspan=\"3\">" .
5687                      $cgi->a({-href => href(action=>"remotes")}, "...") .
5688                      "</td>\n" . "</tr>\n";
5689        }
5690
5691        print "</table>";
5692}
5693
5694# Display remote heads grouped by remote, unless there are too many
5695# remotes, in which case we only display the remote names
5696sub git_remotes_body {
5697        my ($remotedata, $limit, $head) = @_;
5698        if ($limit and $limit < keys %$remotedata) {
5699                git_remotes_list($remotedata, $limit);
5700        } else {
5701                fill_remote_heads($remotedata);
5702                while (my ($remote, $rdata) = each %$remotedata) {
5703                        git_print_section({-class=>"remote", -id=>$remote},
5704                                ["remotes", $remote, $remote], sub {
5705                                        git_remote_block($remote, $rdata, $limit, $head);
5706                                });
5707                }
5708        }
5709}
5710
5711sub git_search_message {
5712        my %co = @_;
5713
5714        my $greptype;
5715        if ($searchtype eq 'commit') {
5716                $greptype = "--grep=";
5717        } elsif ($searchtype eq 'author') {
5718                $greptype = "--author=";
5719        } elsif ($searchtype eq 'committer') {
5720                $greptype = "--committer=";
5721        }
5722        $greptype .= $searchtext;
5723        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5724                                       $greptype, '--regexp-ignore-case',
5725                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5726
5727        my $paging_nav = '';
5728        if ($page > 0) {
5729                $paging_nav .=
5730                        $cgi->a({-href => href(-replay=>1, page=>undef)},
5731                                "first") .
5732                        " &sdot; " .
5733                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
5734                                 -accesskey => "p", -title => "Alt-p"}, "prev");
5735        } else {
5736                $paging_nav .= "first &sdot; prev";
5737        }
5738        my $next_link = '';
5739        if ($#commitlist >= 100) {
5740                $next_link =
5741                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
5742                                 -accesskey => "n", -title => "Alt-n"}, "next");
5743                $paging_nav .= " &sdot; $next_link";
5744        } else {
5745                $paging_nav .= " &sdot; next";
5746        }
5747
5748        git_header_html();
5749
5750        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5751        git_print_header_div('commit', esc_html($co{'title'}), $hash);
5752        if ($page == 0 && !@commitlist) {
5753                print "<p>No match.</p>\n";
5754        } else {
5755                git_search_grep_body(\@commitlist, 0, 99, $next_link);
5756        }
5757
5758        git_footer_html();
5759}
5760
5761sub git_search_changes {
5762        my %co = @_;
5763
5764        local $/ = "\n";
5765        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5766                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5767                ($search_use_regexp ? '--pickaxe-regex' : ())
5768                        or die_error(500, "Open git-log failed");
5769
5770        git_header_html();
5771
5772        git_print_page_nav('','', $hash,$co{'tree'},$hash);
5773        git_print_header_div('commit', esc_html($co{'title'}), $hash);
5774
5775        print "<table class=\"pickaxe search\">\n";
5776        my $alternate = 1;
5777        undef %co;
5778        my @files;
5779        while (my $line = <$fd>) {
5780                chomp $line;
5781                next unless $line;
5782
5783                my %set = parse_difftree_raw_line($line);
5784                if (defined $set{'commit'}) {
5785                        # finish previous commit
5786                        if (%co) {
5787                                print "</td>\n" .
5788                                      "<td class=\"link\">" .
5789                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5790                                              "commit") .
5791                                      " | " .
5792                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5793                                                             hash_base=>$co{'id'})},
5794                                              "tree") .
5795                                      "</td>\n" .
5796                                      "</tr>\n";
5797                        }
5798
5799                        if ($alternate) {
5800                                print "<tr class=\"dark\">\n";
5801                        } else {
5802                                print "<tr class=\"light\">\n";
5803                        }
5804                        $alternate ^= 1;
5805                        %co = parse_commit($set{'commit'});
5806                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5807                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5808                              "<td><i>$author</i></td>\n" .
5809                              "<td>" .
5810                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5811                                      -class => "list subject"},
5812                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
5813                } elsif (defined $set{'to_id'}) {
5814                        next if ($set{'to_id'} =~ m/^0{40}$/);
5815
5816                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5817                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5818                                      -class => "list"},
5819                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5820                              "<br/>\n";
5821                }
5822        }
5823        close $fd;
5824
5825        # finish last commit (warning: repetition!)
5826        if (%co) {
5827                print "</td>\n" .
5828                      "<td class=\"link\">" .
5829                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
5830                              "commit") .
5831                      " | " .
5832                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
5833                                             hash_base=>$co{'id'})},
5834                              "tree") .
5835                      "</td>\n" .
5836                      "</tr>\n";
5837        }
5838
5839        print "</table>\n";
5840
5841        git_footer_html();
5842}
5843
5844sub git_search_files {
5845        my %co = @_;
5846
5847        local $/ = "\n";
5848        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
5849                $search_use_regexp ? ('-E', '-i') : '-F',
5850                $searchtext, $co{'tree'}
5851                        or die_error(500, "Open git-grep failed");
5852
5853        git_header_html();
5854
5855        git_print_page_nav('','', $hash,$co{'tree'},$hash);
5856        git_print_header_div('commit', esc_html($co{'title'}), $hash);
5857
5858        print "<table class=\"grep_search\">\n";
5859        my $alternate = 1;
5860        my $matches = 0;
5861        my $lastfile = '';
5862        my $file_href;
5863        while (my $line = <$fd>) {
5864                chomp $line;
5865                my ($file, $lno, $ltext, $binary);
5866                last if ($matches++ > 1000);
5867                if ($line =~ /^Binary file (.+) matches$/) {
5868                        $file = $1;
5869                        $binary = 1;
5870                } else {
5871                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
5872                        $file =~ s/^$co{'tree'}://;
5873                }
5874                if ($file ne $lastfile) {
5875                        $lastfile and print "</td></tr>\n";
5876                        if ($alternate++) {
5877                                print "<tr class=\"dark\">\n";
5878                        } else {
5879                                print "<tr class=\"light\">\n";
5880                        }
5881                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
5882                                          file_name=>$file);
5883                        print "<td class=\"list\">".
5884                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
5885                        print "</td><td>\n";
5886                        $lastfile = $file;
5887                }
5888                if ($binary) {
5889                        print "<div class=\"binary\">Binary file</div>\n";
5890                } else {
5891                        $ltext = untabify($ltext);
5892                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5893                                $ltext = esc_html($1, -nbsp=>1);
5894                                $ltext .= '<span class="match">';
5895                                $ltext .= esc_html($2, -nbsp=>1);
5896                                $ltext .= '</span>';
5897                                $ltext .= esc_html($3, -nbsp=>1);
5898                        } else {
5899                                $ltext = esc_html($ltext, -nbsp=>1);
5900                        }
5901                        print "<div class=\"pre\">" .
5902                                $cgi->a({-href => $file_href.'#l'.$lno,
5903                                        -class => "linenr"}, sprintf('%4i', $lno)) .
5904                                ' ' .  $ltext . "</div>\n";
5905                }
5906        }
5907        if ($lastfile) {
5908                print "</td></tr>\n";
5909                if ($matches > 1000) {
5910                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5911                }
5912        } else {
5913                print "<div class=\"diff nodifferences\">No matches found</div>\n";
5914        }
5915        close $fd;
5916
5917        print "</table>\n";
5918
5919        git_footer_html();
5920}
5921
5922sub git_search_grep_body {
5923        my ($commitlist, $from, $to, $extra) = @_;
5924        $from = 0 unless defined $from;
5925        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5926
5927        print "<table class=\"commit_search\">\n";
5928        my $alternate = 1;
5929        for (my $i = $from; $i <= $to; $i++) {
5930                my %co = %{$commitlist->[$i]};
5931                if (!%co) {
5932                        next;
5933                }
5934                my $commit = $co{'id'};
5935                if ($alternate) {
5936                        print "<tr class=\"dark\">\n";
5937                } else {
5938                        print "<tr class=\"light\">\n";
5939                }
5940                $alternate ^= 1;
5941                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5942                      format_author_html('td', \%co, 15, 5) .
5943                      "<td>" .
5944                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5945                               -class => "list subject"},
5946                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
5947                my $comment = $co{'comment'};
5948                foreach my $line (@$comment) {
5949                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5950                                my ($lead, $match, $trail) = ($1, $2, $3);
5951                                $match = chop_str($match, 70, 5, 'center');
5952                                my $contextlen = int((80 - length($match))/2);
5953                                $contextlen = 30 if ($contextlen > 30);
5954                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
5955                                $trail = chop_str($trail, $contextlen, 10, 'right');
5956
5957                                $lead  = esc_html($lead);
5958                                $match = esc_html($match);
5959                                $trail = esc_html($trail);
5960
5961                                print "$lead<span class=\"match\">$match</span>$trail<br />";
5962                        }
5963                }
5964                print "</td>\n" .
5965                      "<td class=\"link\">" .
5966                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5967                      " | " .
5968                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5969                      " | " .
5970                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5971                print "</td>\n" .
5972                      "</tr>\n";
5973        }
5974        if (defined $extra) {
5975                print "<tr>\n" .
5976                      "<td colspan=\"3\">$extra</td>\n" .
5977                      "</tr>\n";
5978        }
5979        print "</table>\n";
5980}
5981
5982## ======================================================================
5983## ======================================================================
5984## actions
5985
5986sub git_project_list {
5987        my $order = $input_params{'order'};
5988        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5989                die_error(400, "Unknown order parameter");
5990        }
5991
5992        my @list = git_get_projects_list();
5993        if (!@list) {
5994                die_error(404, "No projects found");
5995        }
5996
5997        git_header_html();
5998        if (defined $home_text && -f $home_text) {
5999                print "<div class=\"index_include\">\n";
6000                insert_file($home_text);
6001                print "</div>\n";
6002        }
6003        print $cgi->startform(-method => "get") .
6004              "<p class=\"projsearch\">Search:\n" .
6005              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
6006              "</p>" .
6007              $cgi->end_form() . "\n";
6008        git_project_list_body(\@list, $order);
6009        git_footer_html();
6010}
6011
6012sub git_forks {
6013        my $order = $input_params{'order'};
6014        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6015                die_error(400, "Unknown order parameter");
6016        }
6017
6018        my @list = git_get_projects_list($project);
6019        if (!@list) {
6020                die_error(404, "No forks found");
6021        }
6022
6023        git_header_html();
6024        git_print_page_nav('','');
6025        git_print_header_div('summary', "$project forks");
6026        git_project_list_body(\@list, $order);
6027        git_footer_html();
6028}
6029
6030sub git_project_index {
6031        my @projects = git_get_projects_list();
6032        if (!@projects) {
6033                die_error(404, "No projects found");
6034        }
6035
6036        print $cgi->header(
6037                -type => 'text/plain',
6038                -charset => 'utf-8',
6039                -content_disposition => 'inline; filename="index.aux"');
6040
6041        foreach my $pr (@projects) {
6042                if (!exists $pr->{'owner'}) {
6043                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6044                }
6045
6046                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6047                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6048                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6049                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6050                $path  =~ s/ /\+/g;
6051                $owner =~ s/ /\+/g;
6052
6053                print "$path $owner\n";
6054        }
6055}
6056
6057sub git_summary {
6058        my $descr = git_get_project_description($project) || "none";
6059        my %co = parse_commit("HEAD");
6060        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6061        my $head = $co{'id'};
6062        my $remote_heads = gitweb_check_feature('remote_heads');
6063
6064        my $owner = git_get_project_owner($project);
6065
6066        my $refs = git_get_references();
6067        # These get_*_list functions return one more to allow us to see if
6068        # there are more ...
6069        my @taglist  = git_get_tags_list(16);
6070        my @headlist = git_get_heads_list(16);
6071        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6072        my @forklist;
6073        my $check_forks = gitweb_check_feature('forks');
6074
6075        if ($check_forks) {
6076                # find forks of a project
6077                @forklist = git_get_projects_list($project);
6078                # filter out forks of forks
6079                @forklist = filter_forks_from_projects_list(\@forklist)
6080                        if (@forklist);
6081        }
6082
6083        git_header_html();
6084        git_print_page_nav('summary','', $head);
6085
6086        print "<div class=\"title\">&nbsp;</div>\n";
6087        print "<table class=\"projects_list\">\n" .
6088              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6089              "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6090        if (defined $cd{'rfc2822'}) {
6091                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6092                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6093        }
6094
6095        # use per project git URL list in $projectroot/$project/cloneurl
6096        # or make project git URL from git base URL and project name
6097        my $url_tag = "URL";
6098        my @url_list = git_get_project_url_list($project);
6099        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6100        foreach my $git_url (@url_list) {
6101                next unless $git_url;
6102                print format_repo_url($url_tag, $git_url);
6103                $url_tag = "";
6104        }
6105
6106        # Tag cloud
6107        my $show_ctags = gitweb_check_feature('ctags');
6108        if ($show_ctags) {
6109                my $ctags = git_get_project_ctags($project);
6110                if (%$ctags) {
6111                        # without ability to add tags, don't show if there are none
6112                        my $cloud = git_populate_project_tagcloud($ctags);
6113                        print "<tr id=\"metadata_ctags\">" .
6114                              "<td>content tags</td>" .
6115                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6116                              "</tr>\n";
6117                }
6118        }
6119
6120        print "</table>\n";
6121
6122        # If XSS prevention is on, we don't include README.html.
6123        # TODO: Allow a readme in some safe format.
6124        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6125                print "<div class=\"title\">readme</div>\n" .
6126                      "<div class=\"readme\">\n";
6127                insert_file("$projectroot/$project/README.html");
6128                print "\n</div>\n"; # class="readme"
6129        }
6130
6131        # we need to request one more than 16 (0..15) to check if
6132        # those 16 are all
6133        my @commitlist = $head ? parse_commits($head, 17) : ();
6134        if (@commitlist) {
6135                git_print_header_div('shortlog');
6136                git_shortlog_body(\@commitlist, 0, 15, $refs,
6137                                  $#commitlist <=  15 ? undef :
6138                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6139        }
6140
6141        if (@taglist) {
6142                git_print_header_div('tags');
6143                git_tags_body(\@taglist, 0, 15,
6144                              $#taglist <=  15 ? undef :
6145                              $cgi->a({-href => href(action=>"tags")}, "..."));
6146        }
6147
6148        if (@headlist) {
6149                git_print_header_div('heads');
6150                git_heads_body(\@headlist, $head, 0, 15,
6151                               $#headlist <= 15 ? undef :
6152                               $cgi->a({-href => href(action=>"heads")}, "..."));
6153        }
6154
6155        if (%remotedata) {
6156                git_print_header_div('remotes');
6157                git_remotes_body(\%remotedata, 15, $head);
6158        }
6159
6160        if (@forklist) {
6161                git_print_header_div('forks');
6162                git_project_list_body(\@forklist, 'age', 0, 15,
6163                                      $#forklist <= 15 ? undef :
6164                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6165                                      'no_header');
6166        }
6167
6168        git_footer_html();
6169}
6170
6171sub git_tag {
6172        my %tag = parse_tag($hash);
6173
6174        if (! %tag) {
6175                die_error(404, "Unknown tag object");
6176        }
6177
6178        my $head = git_get_head_hash($project);
6179        git_header_html();
6180        git_print_page_nav('','', $head,undef,$head);
6181        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6182        print "<div class=\"title_text\">\n" .
6183              "<table class=\"object_header\">\n" .
6184              "<tr>\n" .
6185              "<td>object</td>\n" .
6186              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6187                               $tag{'object'}) . "</td>\n" .
6188              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6189                                              $tag{'type'}) . "</td>\n" .
6190              "</tr>\n";
6191        if (defined($tag{'author'})) {
6192                git_print_authorship_rows(\%tag, 'author');
6193        }
6194        print "</table>\n\n" .
6195              "</div>\n";
6196        print "<div class=\"page_body\">";
6197        my $comment = $tag{'comment'};
6198        foreach my $line (@$comment) {
6199                chomp $line;
6200                print esc_html($line, -nbsp=>1) . "<br/>\n";
6201        }
6202        print "</div>\n";
6203        git_footer_html();
6204}
6205
6206sub git_blame_common {
6207        my $format = shift || 'porcelain';
6208        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6209                $format = 'incremental';
6210                $action = 'blame_incremental'; # for page title etc
6211        }
6212
6213        # permissions
6214        gitweb_check_feature('blame')
6215                or die_error(403, "Blame view not allowed");
6216
6217        # error checking
6218        die_error(400, "No file name given") unless $file_name;
6219        $hash_base ||= git_get_head_hash($project);
6220        die_error(404, "Couldn't find base commit") unless $hash_base;
6221        my %co = parse_commit($hash_base)
6222                or die_error(404, "Commit not found");
6223        my $ftype = "blob";
6224        if (!defined $hash) {
6225                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6226                        or die_error(404, "Error looking up file");
6227        } else {
6228                $ftype = git_get_type($hash);
6229                if ($ftype !~ "blob") {
6230                        die_error(400, "Object is not a blob");
6231                }
6232        }
6233
6234        my $fd;
6235        if ($format eq 'incremental') {
6236                # get file contents (as base)
6237                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6238                        or die_error(500, "Open git-cat-file failed");
6239        } elsif ($format eq 'data') {
6240                # run git-blame --incremental
6241                open $fd, "-|", git_cmd(), "blame", "--incremental",
6242                        $hash_base, "--", $file_name
6243                        or die_error(500, "Open git-blame --incremental failed");
6244        } else {
6245                # run git-blame --porcelain
6246                open $fd, "-|", git_cmd(), "blame", '-p',
6247                        $hash_base, '--', $file_name
6248                        or die_error(500, "Open git-blame --porcelain failed");
6249        }
6250
6251        # incremental blame data returns early
6252        if ($format eq 'data') {
6253                print $cgi->header(
6254                        -type=>"text/plain", -charset => "utf-8",
6255                        -status=> "200 OK");
6256                local $| = 1; # output autoflush
6257                while (my $line = <$fd>) {
6258                        print to_utf8($line);
6259                }
6260                close $fd
6261                        or print "ERROR $!\n";
6262
6263                print 'END';
6264                if (defined $t0 && gitweb_check_feature('timed')) {
6265                        print ' '.
6266                              tv_interval($t0, [ gettimeofday() ]).
6267                              ' '.$number_of_git_cmds;
6268                }
6269                print "\n";
6270
6271                return;
6272        }
6273
6274        # page header
6275        git_header_html();
6276        my $formats_nav =
6277                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6278                        "blob") .
6279                " | ";
6280        if ($format eq 'incremental') {
6281                $formats_nav .=
6282                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6283                                "blame") . " (non-incremental)";
6284        } else {
6285                $formats_nav .=
6286                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6287                                "blame") . " (incremental)";
6288        }
6289        $formats_nav .=
6290                " | " .
6291                $cgi->a({-href => href(action=>"history", -replay=>1)},
6292                        "history") .
6293                " | " .
6294                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6295                        "HEAD");
6296        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6297        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6298        git_print_page_path($file_name, $ftype, $hash_base);
6299
6300        # page body
6301        if ($format eq 'incremental') {
6302                print "<noscript>\n<div class=\"error\"><center><b>\n".
6303                      "This page requires JavaScript to run.\n Use ".
6304                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6305                              'this page').
6306                      " instead.\n".
6307                      "</b></center></div>\n</noscript>\n";
6308
6309                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6310        }
6311
6312        print qq!<div class="page_body">\n!;
6313        print qq!<div id="progress_info">... / ...</div>\n!
6314                if ($format eq 'incremental');
6315        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6316              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6317              qq!<thead>\n!.
6318              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6319              qq!</thead>\n!.
6320              qq!<tbody>\n!;
6321
6322        my @rev_color = qw(light dark);
6323        my $num_colors = scalar(@rev_color);
6324        my $current_color = 0;
6325
6326        if ($format eq 'incremental') {
6327                my $color_class = $rev_color[$current_color];
6328
6329                #contents of a file
6330                my $linenr = 0;
6331        LINE:
6332                while (my $line = <$fd>) {
6333                        chomp $line;
6334                        $linenr++;
6335
6336                        print qq!<tr id="l$linenr" class="$color_class">!.
6337                              qq!<td class="sha1"><a href=""> </a></td>!.
6338                              qq!<td class="linenr">!.
6339                              qq!<a class="linenr" href="">$linenr</a></td>!;
6340                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6341                        print qq!</tr>\n!;
6342                }
6343
6344        } else { # porcelain, i.e. ordinary blame
6345                my %metainfo = (); # saves information about commits
6346
6347                # blame data
6348        LINE:
6349                while (my $line = <$fd>) {
6350                        chomp $line;
6351                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6352                        # no <lines in group> for subsequent lines in group of lines
6353                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6354                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6355                        if (!exists $metainfo{$full_rev}) {
6356                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6357                        }
6358                        my $meta = $metainfo{$full_rev};
6359                        my $data;
6360                        while ($data = <$fd>) {
6361                                chomp $data;
6362                                last if ($data =~ s/^\t//); # contents of line
6363                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6364                                        $meta->{$1} = $2 unless exists $meta->{$1};
6365                                }
6366                                if ($data =~ /^previous /) {
6367                                        $meta->{'nprevious'}++;
6368                                }
6369                        }
6370                        my $short_rev = substr($full_rev, 0, 8);
6371                        my $author = $meta->{'author'};
6372                        my %date =
6373                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6374                        my $date = $date{'iso-tz'};
6375                        if ($group_size) {
6376                                $current_color = ($current_color + 1) % $num_colors;
6377                        }
6378                        my $tr_class = $rev_color[$current_color];
6379                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6380                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6381                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6382                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6383                        if ($group_size) {
6384                                print "<td class=\"sha1\"";
6385                                print " title=\"". esc_html($author) . ", $date\"";
6386                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6387                                print ">";
6388                                print $cgi->a({-href => href(action=>"commit",
6389                                                             hash=>$full_rev,
6390                                                             file_name=>$file_name)},
6391                                              esc_html($short_rev));
6392                                if ($group_size >= 2) {
6393                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6394                                        if (@author_initials) {
6395                                                print "<br />" .
6396                                                      esc_html(join('', @author_initials));
6397                                                #           or join('.', ...)
6398                                        }
6399                                }
6400                                print "</td>\n";
6401                        }
6402                        # 'previous' <sha1 of parent commit> <filename at commit>
6403                        if (exists $meta->{'previous'} &&
6404                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6405                                $meta->{'parent'} = $1;
6406                                $meta->{'file_parent'} = unquote($2);
6407                        }
6408                        my $linenr_commit =
6409                                exists($meta->{'parent'}) ?
6410                                $meta->{'parent'} : $full_rev;
6411                        my $linenr_filename =
6412                                exists($meta->{'file_parent'}) ?
6413                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6414                        my $blamed = href(action => 'blame',
6415                                          file_name => $linenr_filename,
6416                                          hash_base => $linenr_commit);
6417                        print "<td class=\"linenr\">";
6418                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6419                                        -class => "linenr" },
6420                                      esc_html($lineno));
6421                        print "</td>";
6422                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6423                        print "</tr>\n";
6424                } # end while
6425
6426        }
6427
6428        # footer
6429        print "</tbody>\n".
6430              "</table>\n"; # class="blame"
6431        print "</div>\n";   # class="blame_body"
6432        close $fd
6433                or print "Reading blob failed\n";
6434
6435        git_footer_html();
6436}
6437
6438sub git_blame {
6439        git_blame_common();
6440}
6441
6442sub git_blame_incremental {
6443        git_blame_common('incremental');
6444}
6445
6446sub git_blame_data {
6447        git_blame_common('data');
6448}
6449
6450sub git_tags {
6451        my $head = git_get_head_hash($project);
6452        git_header_html();
6453        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6454        git_print_header_div('summary', $project);
6455
6456        my @tagslist = git_get_tags_list();
6457        if (@tagslist) {
6458                git_tags_body(\@tagslist);
6459        }
6460        git_footer_html();
6461}
6462
6463sub git_heads {
6464        my $head = git_get_head_hash($project);
6465        git_header_html();
6466        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6467        git_print_header_div('summary', $project);
6468
6469        my @headslist = git_get_heads_list();
6470        if (@headslist) {
6471                git_heads_body(\@headslist, $head);
6472        }
6473        git_footer_html();
6474}
6475
6476# used both for single remote view and for list of all the remotes
6477sub git_remotes {
6478        gitweb_check_feature('remote_heads')
6479                or die_error(403, "Remote heads view is disabled");
6480
6481        my $head = git_get_head_hash($project);
6482        my $remote = $input_params{'hash'};
6483
6484        my $remotedata = git_get_remotes_list($remote);
6485        die_error(500, "Unable to get remote information") unless defined $remotedata;
6486
6487        unless (%$remotedata) {
6488                die_error(404, defined $remote ?
6489                        "Remote $remote not found" :
6490                        "No remotes found");
6491        }
6492
6493        git_header_html(undef, undef, -action_extra => $remote);
6494        git_print_page_nav('', '',  $head, undef, $head,
6495                format_ref_views($remote ? '' : 'remotes'));
6496
6497        fill_remote_heads($remotedata);
6498        if (defined $remote) {
6499                git_print_header_div('remotes', "$remote remote for $project");
6500                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6501        } else {
6502                git_print_header_div('summary', "$project remotes");
6503                git_remotes_body($remotedata, undef, $head);
6504        }
6505
6506        git_footer_html();
6507}
6508
6509sub git_blob_plain {
6510        my $type = shift;
6511        my $expires;
6512
6513        if (!defined $hash) {
6514                if (defined $file_name) {
6515                        my $base = $hash_base || git_get_head_hash($project);
6516                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6517                                or die_error(404, "Cannot find file");
6518                } else {
6519                        die_error(400, "No file name defined");
6520                }
6521        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6522                # blobs defined by non-textual hash id's can be cached
6523                $expires = "+1d";
6524        }
6525
6526        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6527                or die_error(500, "Open git-cat-file blob '$hash' failed");
6528
6529        # content-type (can include charset)
6530        $type = blob_contenttype($fd, $file_name, $type);
6531
6532        # "save as" filename, even when no $file_name is given
6533        my $save_as = "$hash";
6534        if (defined $file_name) {
6535                $save_as = $file_name;
6536        } elsif ($type =~ m/^text\//) {
6537                $save_as .= '.txt';
6538        }
6539
6540        # With XSS prevention on, blobs of all types except a few known safe
6541        # ones are served with "Content-Disposition: attachment" to make sure
6542        # they don't run in our security domain.  For certain image types,
6543        # blob view writes an <img> tag referring to blob_plain view, and we
6544        # want to be sure not to break that by serving the image as an
6545        # attachment (though Firefox 3 doesn't seem to care).
6546        my $sandbox = $prevent_xss &&
6547                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6548
6549        # serve text/* as text/plain
6550        if ($prevent_xss &&
6551            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6552             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6553                my $rest = $1;
6554                $rest = defined $rest ? $rest : '';
6555                $type = "text/plain$rest";
6556        }
6557
6558        print $cgi->header(
6559                -type => $type,
6560                -expires => $expires,
6561                -content_disposition =>
6562                        ($sandbox ? 'attachment' : 'inline')
6563                        . '; filename="' . $save_as . '"');
6564        local $/ = undef;
6565        binmode STDOUT, ':raw';
6566        print <$fd>;
6567        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6568        close $fd;
6569}
6570
6571sub git_blob {
6572        my $expires;
6573
6574        if (!defined $hash) {
6575                if (defined $file_name) {
6576                        my $base = $hash_base || git_get_head_hash($project);
6577                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6578                                or die_error(404, "Cannot find file");
6579                } else {
6580                        die_error(400, "No file name defined");
6581                }
6582        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6583                # blobs defined by non-textual hash id's can be cached
6584                $expires = "+1d";
6585        }
6586
6587        my $have_blame = gitweb_check_feature('blame');
6588        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6589                or die_error(500, "Couldn't cat $file_name, $hash");
6590        my $mimetype = blob_mimetype($fd, $file_name);
6591        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6592        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6593                close $fd;
6594                return git_blob_plain($mimetype);
6595        }
6596        # we can have blame only for text/* mimetype
6597        $have_blame &&= ($mimetype =~ m!^text/!);
6598
6599        my $highlight = gitweb_check_feature('highlight');
6600        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6601        $fd = run_highlighter($fd, $highlight, $syntax)
6602                if $syntax;
6603
6604        git_header_html(undef, $expires);
6605        my $formats_nav = '';
6606        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6607                if (defined $file_name) {
6608                        if ($have_blame) {
6609                                $formats_nav .=
6610                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6611                                                "blame") .
6612                                        " | ";
6613                        }
6614                        $formats_nav .=
6615                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6616                                        "history") .
6617                                " | " .
6618                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6619                                        "raw") .
6620                                " | " .
6621                                $cgi->a({-href => href(action=>"blob",
6622                                                       hash_base=>"HEAD", file_name=>$file_name)},
6623                                        "HEAD");
6624                } else {
6625                        $formats_nav .=
6626                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6627                                        "raw");
6628                }
6629                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6630                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6631        } else {
6632                print "<div class=\"page_nav\">\n" .
6633                      "<br/><br/></div>\n" .
6634                      "<div class=\"title\">".esc_html($hash)."</div>\n";
6635        }
6636        git_print_page_path($file_name, "blob", $hash_base);
6637        print "<div class=\"page_body\">\n";
6638        if ($mimetype =~ m!^image/!) {
6639                print qq!<img type="!.esc_attr($mimetype).qq!"!;
6640                if ($file_name) {
6641                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6642                }
6643                print qq! src="! .
6644                      href(action=>"blob_plain", hash=>$hash,
6645                           hash_base=>$hash_base, file_name=>$file_name) .
6646                      qq!" />\n!;
6647        } else {
6648                my $nr;
6649                while (my $line = <$fd>) {
6650                        chomp $line;
6651                        $nr++;
6652                        $line = untabify($line);
6653                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6654                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6655                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6656                }
6657        }
6658        close $fd
6659                or print "Reading blob failed.\n";
6660        print "</div>";
6661        git_footer_html();
6662}
6663
6664sub git_tree {
6665        if (!defined $hash_base) {
6666                $hash_base = "HEAD";
6667        }
6668        if (!defined $hash) {
6669                if (defined $file_name) {
6670                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6671                } else {
6672                        $hash = $hash_base;
6673                }
6674        }
6675        die_error(404, "No such tree") unless defined($hash);
6676
6677        my $show_sizes = gitweb_check_feature('show-sizes');
6678        my $have_blame = gitweb_check_feature('blame');
6679
6680        my @entries = ();
6681        {
6682                local $/ = "\0";
6683                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6684                        ($show_sizes ? '-l' : ()), @extra_options, $hash
6685                        or die_error(500, "Open git-ls-tree failed");
6686                @entries = map { chomp; $_ } <$fd>;
6687                close $fd
6688                        or die_error(404, "Reading tree failed");
6689        }
6690
6691        my $refs = git_get_references();
6692        my $ref = format_ref_marker($refs, $hash_base);
6693        git_header_html();
6694        my $basedir = '';
6695        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6696                my @views_nav = ();
6697                if (defined $file_name) {
6698                        push @views_nav,
6699                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6700                                        "history"),
6701                                $cgi->a({-href => href(action=>"tree",
6702                                                       hash_base=>"HEAD", file_name=>$file_name)},
6703                                        "HEAD"),
6704                }
6705                my $snapshot_links = format_snapshot_links($hash);
6706                if (defined $snapshot_links) {
6707                        # FIXME: Should be available when we have no hash base as well.
6708                        push @views_nav, $snapshot_links;
6709                }
6710                git_print_page_nav('tree','', $hash_base, undef, undef,
6711                                   join(' | ', @views_nav));
6712                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6713        } else {
6714                undef $hash_base;
6715                print "<div class=\"page_nav\">\n";
6716                print "<br/><br/></div>\n";
6717                print "<div class=\"title\">".esc_html($hash)."</div>\n";
6718        }
6719        if (defined $file_name) {
6720                $basedir = $file_name;
6721                if ($basedir ne '' && substr($basedir, -1) ne '/') {
6722                        $basedir .= '/';
6723                }
6724                git_print_page_path($file_name, 'tree', $hash_base);
6725        }
6726        print "<div class=\"page_body\">\n";
6727        print "<table class=\"tree\">\n";
6728        my $alternate = 1;
6729        # '..' (top directory) link if possible
6730        if (defined $hash_base &&
6731            defined $file_name && $file_name =~ m![^/]+$!) {
6732                if ($alternate) {
6733                        print "<tr class=\"dark\">\n";
6734                } else {
6735                        print "<tr class=\"light\">\n";
6736                }
6737                $alternate ^= 1;
6738
6739                my $up = $file_name;
6740                $up =~ s!/?[^/]+$!!;
6741                undef $up unless $up;
6742                # based on git_print_tree_entry
6743                print '<td class="mode">' . mode_str('040000') . "</td>\n";
6744                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6745                print '<td class="list">';
6746                print $cgi->a({-href => href(action=>"tree",
6747                                             hash_base=>$hash_base,
6748                                             file_name=>$up)},
6749                              "..");
6750                print "</td>\n";
6751                print "<td class=\"link\"></td>\n";
6752
6753                print "</tr>\n";
6754        }
6755        foreach my $line (@entries) {
6756                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6757
6758                if ($alternate) {
6759                        print "<tr class=\"dark\">\n";
6760                } else {
6761                        print "<tr class=\"light\">\n";
6762                }
6763                $alternate ^= 1;
6764
6765                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6766
6767                print "</tr>\n";
6768        }
6769        print "</table>\n" .
6770              "</div>";
6771        git_footer_html();
6772}
6773
6774sub snapshot_name {
6775        my ($project, $hash) = @_;
6776
6777        # path/to/project.git  -> project
6778        # path/to/project/.git -> project
6779        my $name = to_utf8($project);
6780        $name =~ s,([^/])/*\.git$,$1,;
6781        $name = basename($name);
6782        # sanitize name
6783        $name =~ s/[[:cntrl:]]/?/g;
6784
6785        my $ver = $hash;
6786        if ($hash =~ /^[0-9a-fA-F]+$/) {
6787                # shorten SHA-1 hash
6788                my $full_hash = git_get_full_hash($project, $hash);
6789                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6790                        $ver = git_get_short_hash($project, $hash);
6791                }
6792        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6793                # tags don't need shortened SHA-1 hash
6794                $ver = $1;
6795        } else {
6796                # branches and other need shortened SHA-1 hash
6797                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6798                        $ver = $1;
6799                }
6800                $ver .= '-' . git_get_short_hash($project, $hash);
6801        }
6802        # in case of hierarchical branch names
6803        $ver =~ s!/!.!g;
6804
6805        # name = project-version_string
6806        $name = "$name-$ver";
6807
6808        return wantarray ? ($name, $name) : $name;
6809}
6810
6811sub git_snapshot {
6812        my $format = $input_params{'snapshot_format'};
6813        if (!@snapshot_fmts) {
6814                die_error(403, "Snapshots not allowed");
6815        }
6816        # default to first supported snapshot format
6817        $format ||= $snapshot_fmts[0];
6818        if ($format !~ m/^[a-z0-9]+$/) {
6819                die_error(400, "Invalid snapshot format parameter");
6820        } elsif (!exists($known_snapshot_formats{$format})) {
6821                die_error(400, "Unknown snapshot format");
6822        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6823                die_error(403, "Snapshot format not allowed");
6824        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6825                die_error(403, "Unsupported snapshot format");
6826        }
6827
6828        my $type = git_get_type("$hash^{}");
6829        if (!$type) {
6830                die_error(404, 'Object does not exist');
6831        }  elsif ($type eq 'blob') {
6832                die_error(400, 'Object is not a tree-ish');
6833        }
6834
6835        my ($name, $prefix) = snapshot_name($project, $hash);
6836        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6837        my $cmd = quote_command(
6838                git_cmd(), 'archive',
6839                "--format=$known_snapshot_formats{$format}{'format'}",
6840                "--prefix=$prefix/", $hash);
6841        if (exists $known_snapshot_formats{$format}{'compressor'}) {
6842                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6843        }
6844
6845        $filename =~ s/(["\\])/\\$1/g;
6846        print $cgi->header(
6847                -type => $known_snapshot_formats{$format}{'type'},
6848                -content_disposition => 'inline; filename="' . $filename . '"',
6849                -status => '200 OK');
6850
6851        open my $fd, "-|", $cmd
6852                or die_error(500, "Execute git-archive failed");
6853        binmode STDOUT, ':raw';
6854        print <$fd>;
6855        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6856        close $fd;
6857}
6858
6859sub git_log_generic {
6860        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6861
6862        my $head = git_get_head_hash($project);
6863        if (!defined $base) {
6864                $base = $head;
6865        }
6866        if (!defined $page) {
6867                $page = 0;
6868        }
6869        my $refs = git_get_references();
6870
6871        my $commit_hash = $base;
6872        if (defined $parent) {
6873                $commit_hash = "$parent..$base";
6874        }
6875        my @commitlist =
6876                parse_commits($commit_hash, 101, (100 * $page),
6877                              defined $file_name ? ($file_name, "--full-history") : ());
6878
6879        my $ftype;
6880        if (!defined $file_hash && defined $file_name) {
6881                # some commits could have deleted file in question,
6882                # and not have it in tree, but one of them has to have it
6883                for (my $i = 0; $i < @commitlist; $i++) {
6884                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6885                        last if defined $file_hash;
6886                }
6887        }
6888        if (defined $file_hash) {
6889                $ftype = git_get_type($file_hash);
6890        }
6891        if (defined $file_name && !defined $ftype) {
6892                die_error(500, "Unknown type of object");
6893        }
6894        my %co;
6895        if (defined $file_name) {
6896                %co = parse_commit($base)
6897                        or die_error(404, "Unknown commit object");
6898        }
6899
6900
6901        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6902        my $next_link = '';
6903        if ($#commitlist >= 100) {
6904                $next_link =
6905                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
6906                                 -accesskey => "n", -title => "Alt-n"}, "next");
6907        }
6908        my $patch_max = gitweb_get_feature('patches');
6909        if ($patch_max && !defined $file_name) {
6910                if ($patch_max < 0 || @commitlist <= $patch_max) {
6911                        $paging_nav .= " &sdot; " .
6912                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
6913                                        "patches");
6914                }
6915        }
6916
6917        git_header_html();
6918        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6919        if (defined $file_name) {
6920                git_print_header_div('commit', esc_html($co{'title'}), $base);
6921        } else {
6922                git_print_header_div('summary', $project)
6923        }
6924        git_print_page_path($file_name, $ftype, $hash_base)
6925                if (defined $file_name);
6926
6927        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6928                     $file_name, $file_hash, $ftype);
6929
6930        git_footer_html();
6931}
6932
6933sub git_log {
6934        git_log_generic('log', \&git_log_body,
6935                        $hash, $hash_parent);
6936}
6937
6938sub git_commit {
6939        $hash ||= $hash_base || "HEAD";
6940        my %co = parse_commit($hash)
6941            or die_error(404, "Unknown commit object");
6942
6943        my $parent  = $co{'parent'};
6944        my $parents = $co{'parents'}; # listref
6945
6946        # we need to prepare $formats_nav before any parameter munging
6947        my $formats_nav;
6948        if (!defined $parent) {
6949                # --root commitdiff
6950                $formats_nav .= '(initial)';
6951        } elsif (@$parents == 1) {
6952                # single parent commit
6953                $formats_nav .=
6954                        '(parent: ' .
6955                        $cgi->a({-href => href(action=>"commit",
6956                                               hash=>$parent)},
6957                                esc_html(substr($parent, 0, 7))) .
6958                        ')';
6959        } else {
6960                # merge commit
6961                $formats_nav .=
6962                        '(merge: ' .
6963                        join(' ', map {
6964                                $cgi->a({-href => href(action=>"commit",
6965                                                       hash=>$_)},
6966                                        esc_html(substr($_, 0, 7)));
6967                        } @$parents ) .
6968                        ')';
6969        }
6970        if (gitweb_check_feature('patches') && @$parents <= 1) {
6971                $formats_nav .= " | " .
6972                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
6973                                "patch");
6974        }
6975
6976        if (!defined $parent) {
6977                $parent = "--root";
6978        }
6979        my @difftree;
6980        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6981                @diff_opts,
6982                (@$parents <= 1 ? $parent : '-c'),
6983                $hash, "--"
6984                or die_error(500, "Open git-diff-tree failed");
6985        @difftree = map { chomp; $_ } <$fd>;
6986        close $fd or die_error(404, "Reading git-diff-tree failed");
6987
6988        # non-textual hash id's can be cached
6989        my $expires;
6990        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6991                $expires = "+1d";
6992        }
6993        my $refs = git_get_references();
6994        my $ref = format_ref_marker($refs, $co{'id'});
6995
6996        git_header_html(undef, $expires);
6997        git_print_page_nav('commit', '',
6998                           $hash, $co{'tree'}, $hash,
6999                           $formats_nav);
7000
7001        if (defined $co{'parent'}) {
7002                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7003        } else {
7004                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7005        }
7006        print "<div class=\"title_text\">\n" .
7007              "<table class=\"object_header\">\n";
7008        git_print_authorship_rows(\%co);
7009        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7010        print "<tr>" .
7011              "<td>tree</td>" .
7012              "<td class=\"sha1\">" .
7013              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7014                       class => "list"}, $co{'tree'}) .
7015              "</td>" .
7016              "<td class=\"link\">" .
7017              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7018                      "tree");
7019        my $snapshot_links = format_snapshot_links($hash);
7020        if (defined $snapshot_links) {
7021                print " | " . $snapshot_links;
7022        }
7023        print "</td>" .
7024              "</tr>\n";
7025
7026        foreach my $par (@$parents) {
7027                print "<tr>" .
7028                      "<td>parent</td>" .
7029                      "<td class=\"sha1\">" .
7030                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7031                               class => "list"}, $par) .
7032                      "</td>" .
7033                      "<td class=\"link\">" .
7034                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7035                      " | " .
7036                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7037                      "</td>" .
7038                      "</tr>\n";
7039        }
7040        print "</table>".
7041              "</div>\n";
7042
7043        print "<div class=\"page_body\">\n";
7044        git_print_log($co{'comment'});
7045        print "</div>\n";
7046
7047        git_difftree_body(\@difftree, $hash, @$parents);
7048
7049        git_footer_html();
7050}
7051
7052sub git_object {
7053        # object is defined by:
7054        # - hash or hash_base alone
7055        # - hash_base and file_name
7056        my $type;
7057
7058        # - hash or hash_base alone
7059        if ($hash || ($hash_base && !defined $file_name)) {
7060                my $object_id = $hash || $hash_base;
7061
7062                open my $fd, "-|", quote_command(
7063                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7064                        or die_error(404, "Object does not exist");
7065                $type = <$fd>;
7066                chomp $type;
7067                close $fd
7068                        or die_error(404, "Object does not exist");
7069
7070        # - hash_base and file_name
7071        } elsif ($hash_base && defined $file_name) {
7072                $file_name =~ s,/+$,,;
7073
7074                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7075                        or die_error(404, "Base object does not exist");
7076
7077                # here errors should not hapen
7078                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7079                        or die_error(500, "Open git-ls-tree failed");
7080                my $line = <$fd>;
7081                close $fd;
7082
7083                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7084                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7085                        die_error(404, "File or directory for given base does not exist");
7086                }
7087                $type = $2;
7088                $hash = $3;
7089        } else {
7090                die_error(400, "Not enough information to find object");
7091        }
7092
7093        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7094                                          hash=>$hash, hash_base=>$hash_base,
7095                                          file_name=>$file_name),
7096                             -status => '302 Found');
7097}
7098
7099sub git_blobdiff {
7100        my $format = shift || 'html';
7101        my $diff_style = $input_params{'diff_style'} || 'inline';
7102
7103        my $fd;
7104        my @difftree;
7105        my %diffinfo;
7106        my $expires;
7107
7108        # preparing $fd and %diffinfo for git_patchset_body
7109        # new style URI
7110        if (defined $hash_base && defined $hash_parent_base) {
7111                if (defined $file_name) {
7112                        # read raw output
7113                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7114                                $hash_parent_base, $hash_base,
7115                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7116                                or die_error(500, "Open git-diff-tree failed");
7117                        @difftree = map { chomp; $_ } <$fd>;
7118                        close $fd
7119                                or die_error(404, "Reading git-diff-tree failed");
7120                        @difftree
7121                                or die_error(404, "Blob diff not found");
7122
7123                } elsif (defined $hash &&
7124                         $hash =~ /[0-9a-fA-F]{40}/) {
7125                        # try to find filename from $hash
7126
7127                        # read filtered raw output
7128                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7129                                $hash_parent_base, $hash_base, "--"
7130                                or die_error(500, "Open git-diff-tree failed");
7131                        @difftree =
7132                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7133                                # $hash == to_id
7134                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7135                                map { chomp; $_ } <$fd>;
7136                        close $fd
7137                                or die_error(404, "Reading git-diff-tree failed");
7138                        @difftree
7139                                or die_error(404, "Blob diff not found");
7140
7141                } else {
7142                        die_error(400, "Missing one of the blob diff parameters");
7143                }
7144
7145                if (@difftree > 1) {
7146                        die_error(400, "Ambiguous blob diff specification");
7147                }
7148
7149                %diffinfo = parse_difftree_raw_line($difftree[0]);
7150                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7151                $file_name   ||= $diffinfo{'to_file'};
7152
7153                $hash_parent ||= $diffinfo{'from_id'};
7154                $hash        ||= $diffinfo{'to_id'};
7155
7156                # non-textual hash id's can be cached
7157                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7158                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7159                        $expires = '+1d';
7160                }
7161
7162                # open patch output
7163                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7164                        '-p', ($format eq 'html' ? "--full-index" : ()),
7165                        $hash_parent_base, $hash_base,
7166                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7167                        or die_error(500, "Open git-diff-tree failed");
7168        }
7169
7170        # old/legacy style URI -- not generated anymore since 1.4.3.
7171        if (!%diffinfo) {
7172                die_error('404 Not Found', "Missing one of the blob diff parameters")
7173        }
7174
7175        # header
7176        if ($format eq 'html') {
7177                my $formats_nav =
7178                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7179                                "raw");
7180                $formats_nav .= diff_style_nav($diff_style);
7181                git_header_html(undef, $expires);
7182                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7183                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7184                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7185                } else {
7186                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7187                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7188                }
7189                if (defined $file_name) {
7190                        git_print_page_path($file_name, "blob", $hash_base);
7191                } else {
7192                        print "<div class=\"page_path\"></div>\n";
7193                }
7194
7195        } elsif ($format eq 'plain') {
7196                print $cgi->header(
7197                        -type => 'text/plain',
7198                        -charset => 'utf-8',
7199                        -expires => $expires,
7200                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7201
7202                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7203
7204        } else {
7205                die_error(400, "Unknown blobdiff format");
7206        }
7207
7208        # patch
7209        if ($format eq 'html') {
7210                print "<div class=\"page_body\">\n";
7211
7212                git_patchset_body($fd, $diff_style,
7213                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7214                close $fd;
7215
7216                print "</div>\n"; # class="page_body"
7217                git_footer_html();
7218
7219        } else {
7220                while (my $line = <$fd>) {
7221                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7222                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7223
7224                        print $line;
7225
7226                        last if $line =~ m!^\+\+\+!;
7227                }
7228                local $/ = undef;
7229                print <$fd>;
7230                close $fd;
7231        }
7232}
7233
7234sub git_blobdiff_plain {
7235        git_blobdiff('plain');
7236}
7237
7238# assumes that it is added as later part of already existing navigation,
7239# so it returns "| foo | bar" rather than just "foo | bar"
7240sub diff_style_nav {
7241        my ($diff_style, $is_combined) = @_;
7242        $diff_style ||= 'inline';
7243
7244        return "" if ($is_combined);
7245
7246        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7247        my %styles = @styles;
7248        @styles =
7249                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7250
7251        return join '',
7252                map { " | ".$_ }
7253                map {
7254                        $_ eq $diff_style ? $styles{$_} :
7255                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7256                } @styles;
7257}
7258
7259sub git_commitdiff {
7260        my %params = @_;
7261        my $format = $params{-format} || 'html';
7262        my $diff_style = $input_params{'diff_style'} || 'inline';
7263
7264        my ($patch_max) = gitweb_get_feature('patches');
7265        if ($format eq 'patch') {
7266                die_error(403, "Patch view not allowed") unless $patch_max;
7267        }
7268
7269        $hash ||= $hash_base || "HEAD";
7270        my %co = parse_commit($hash)
7271            or die_error(404, "Unknown commit object");
7272
7273        # choose format for commitdiff for merge
7274        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7275                $hash_parent = '--cc';
7276        }
7277        # we need to prepare $formats_nav before almost any parameter munging
7278        my $formats_nav;
7279        if ($format eq 'html') {
7280                $formats_nav =
7281                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7282                                "raw");
7283                if ($patch_max && @{$co{'parents'}} <= 1) {
7284                        $formats_nav .= " | " .
7285                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7286                                        "patch");
7287                }
7288                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7289
7290                if (defined $hash_parent &&
7291                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7292                        # commitdiff with two commits given
7293                        my $hash_parent_short = $hash_parent;
7294                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7295                                $hash_parent_short = substr($hash_parent, 0, 7);
7296                        }
7297                        $formats_nav .=
7298                                ' (from';
7299                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7300                                if ($co{'parents'}[$i] eq $hash_parent) {
7301                                        $formats_nav .= ' parent ' . ($i+1);
7302                                        last;
7303                                }
7304                        }
7305                        $formats_nav .= ': ' .
7306                                $cgi->a({-href => href(-replay=>1,
7307                                                       hash=>$hash_parent, hash_base=>undef)},
7308                                        esc_html($hash_parent_short)) .
7309                                ')';
7310                } elsif (!$co{'parent'}) {
7311                        # --root commitdiff
7312                        $formats_nav .= ' (initial)';
7313                } elsif (scalar @{$co{'parents'}} == 1) {
7314                        # single parent commit
7315                        $formats_nav .=
7316                                ' (parent: ' .
7317                                $cgi->a({-href => href(-replay=>1,
7318                                                       hash=>$co{'parent'}, hash_base=>undef)},
7319                                        esc_html(substr($co{'parent'}, 0, 7))) .
7320                                ')';
7321                } else {
7322                        # merge commit
7323                        if ($hash_parent eq '--cc') {
7324                                $formats_nav .= ' | ' .
7325                                        $cgi->a({-href => href(-replay=>1,
7326                                                               hash=>$hash, hash_parent=>'-c')},
7327                                                'combined');
7328                        } else { # $hash_parent eq '-c'
7329                                $formats_nav .= ' | ' .
7330                                        $cgi->a({-href => href(-replay=>1,
7331                                                               hash=>$hash, hash_parent=>'--cc')},
7332                                                'compact');
7333                        }
7334                        $formats_nav .=
7335                                ' (merge: ' .
7336                                join(' ', map {
7337                                        $cgi->a({-href => href(-replay=>1,
7338                                                               hash=>$_, hash_base=>undef)},
7339                                                esc_html(substr($_, 0, 7)));
7340                                } @{$co{'parents'}} ) .
7341                                ')';
7342                }
7343        }
7344
7345        my $hash_parent_param = $hash_parent;
7346        if (!defined $hash_parent_param) {
7347                # --cc for multiple parents, --root for parentless
7348                $hash_parent_param =
7349                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7350        }
7351
7352        # read commitdiff
7353        my $fd;
7354        my @difftree;
7355        if ($format eq 'html') {
7356                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7357                        "--no-commit-id", "--patch-with-raw", "--full-index",
7358                        $hash_parent_param, $hash, "--"
7359                        or die_error(500, "Open git-diff-tree failed");
7360
7361                while (my $line = <$fd>) {
7362                        chomp $line;
7363                        # empty line ends raw part of diff-tree output
7364                        last unless $line;
7365                        push @difftree, scalar parse_difftree_raw_line($line);
7366                }
7367
7368        } elsif ($format eq 'plain') {
7369                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7370                        '-p', $hash_parent_param, $hash, "--"
7371                        or die_error(500, "Open git-diff-tree failed");
7372        } elsif ($format eq 'patch') {
7373                # For commit ranges, we limit the output to the number of
7374                # patches specified in the 'patches' feature.
7375                # For single commits, we limit the output to a single patch,
7376                # diverging from the git-format-patch default.
7377                my @commit_spec = ();
7378                if ($hash_parent) {
7379                        if ($patch_max > 0) {
7380                                push @commit_spec, "-$patch_max";
7381                        }
7382                        push @commit_spec, '-n', "$hash_parent..$hash";
7383                } else {
7384                        if ($params{-single}) {
7385                                push @commit_spec, '-1';
7386                        } else {
7387                                if ($patch_max > 0) {
7388                                        push @commit_spec, "-$patch_max";
7389                                }
7390                                push @commit_spec, "-n";
7391                        }
7392                        push @commit_spec, '--root', $hash;
7393                }
7394                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7395                        '--encoding=utf8', '--stdout', @commit_spec
7396                        or die_error(500, "Open git-format-patch failed");
7397        } else {
7398                die_error(400, "Unknown commitdiff format");
7399        }
7400
7401        # non-textual hash id's can be cached
7402        my $expires;
7403        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7404                $expires = "+1d";
7405        }
7406
7407        # write commit message
7408        if ($format eq 'html') {
7409                my $refs = git_get_references();
7410                my $ref = format_ref_marker($refs, $co{'id'});
7411
7412                git_header_html(undef, $expires);
7413                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7414                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7415                print "<div class=\"title_text\">\n" .
7416                      "<table class=\"object_header\">\n";
7417                git_print_authorship_rows(\%co);
7418                print "</table>".
7419                      "</div>\n";
7420                print "<div class=\"page_body\">\n";
7421                if (@{$co{'comment'}} > 1) {
7422                        print "<div class=\"log\">\n";
7423                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7424                        print "</div>\n"; # class="log"
7425                }
7426
7427        } elsif ($format eq 'plain') {
7428                my $refs = git_get_references("tags");
7429                my $tagname = git_get_rev_name_tags($hash);
7430                my $filename = basename($project) . "-$hash.patch";
7431
7432                print $cgi->header(
7433                        -type => 'text/plain',
7434                        -charset => 'utf-8',
7435                        -expires => $expires,
7436                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7437                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7438                print "From: " . to_utf8($co{'author'}) . "\n";
7439                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7440                print "Subject: " . to_utf8($co{'title'}) . "\n";
7441
7442                print "X-Git-Tag: $tagname\n" if $tagname;
7443                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7444
7445                foreach my $line (@{$co{'comment'}}) {
7446                        print to_utf8($line) . "\n";
7447                }
7448                print "---\n\n";
7449        } elsif ($format eq 'patch') {
7450                my $filename = basename($project) . "-$hash.patch";
7451
7452                print $cgi->header(
7453                        -type => 'text/plain',
7454                        -charset => 'utf-8',
7455                        -expires => $expires,
7456                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7457        }
7458
7459        # write patch
7460        if ($format eq 'html') {
7461                my $use_parents = !defined $hash_parent ||
7462                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7463                git_difftree_body(\@difftree, $hash,
7464                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7465                print "<br/>\n";
7466
7467                git_patchset_body($fd, $diff_style,
7468                                  \@difftree, $hash,
7469                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7470                close $fd;
7471                print "</div>\n"; # class="page_body"
7472                git_footer_html();
7473
7474        } elsif ($format eq 'plain') {
7475                local $/ = undef;
7476                print <$fd>;
7477                close $fd
7478                        or print "Reading git-diff-tree failed\n";
7479        } elsif ($format eq 'patch') {
7480                local $/ = undef;
7481                print <$fd>;
7482                close $fd
7483                        or print "Reading git-format-patch failed\n";
7484        }
7485}
7486
7487sub git_commitdiff_plain {
7488        git_commitdiff(-format => 'plain');
7489}
7490
7491# format-patch-style patches
7492sub git_patch {
7493        git_commitdiff(-format => 'patch', -single => 1);
7494}
7495
7496sub git_patches {
7497        git_commitdiff(-format => 'patch');
7498}
7499
7500sub git_history {
7501        git_log_generic('history', \&git_history_body,
7502                        $hash_base, $hash_parent_base,
7503                        $file_name, $hash);
7504}
7505
7506sub git_search {
7507        $searchtype ||= 'commit';
7508
7509        # check if appropriate features are enabled
7510        gitweb_check_feature('search')
7511                or die_error(403, "Search is disabled");
7512        if ($searchtype eq 'pickaxe') {
7513                # pickaxe may take all resources of your box and run for several minutes
7514                # with every query - so decide by yourself how public you make this feature
7515                gitweb_check_feature('pickaxe')
7516                        or die_error(403, "Pickaxe search is disabled");
7517        }
7518        if ($searchtype eq 'grep') {
7519                # grep search might be potentially CPU-intensive, too
7520                gitweb_check_feature('grep')
7521                        or die_error(403, "Grep search is disabled");
7522        }
7523
7524        if (!defined $searchtext) {
7525                die_error(400, "Text field is empty");
7526        }
7527        if (!defined $hash) {
7528                $hash = git_get_head_hash($project);
7529        }
7530        my %co = parse_commit($hash);
7531        if (!%co) {
7532                die_error(404, "Unknown commit object");
7533        }
7534        if (!defined $page) {
7535                $page = 0;
7536        }
7537
7538        if ($searchtype eq 'commit' ||
7539            $searchtype eq 'author' ||
7540            $searchtype eq 'committer') {
7541                git_search_message(%co);
7542        } elsif ($searchtype eq 'pickaxe') {
7543                git_search_changes(%co);
7544        } elsif ($searchtype eq 'grep') {
7545                git_search_files(%co);
7546        } else {
7547                die_error(400, "Unknown search type");
7548        }
7549}
7550
7551sub git_search_help {
7552        git_header_html();
7553        git_print_page_nav('','', $hash,$hash,$hash);
7554        print <<EOT;
7555<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7556regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7557the pattern entered is recognized as the POSIX extended
7558<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7559insensitive).</p>
7560<dl>
7561<dt><b>commit</b></dt>
7562<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7563EOT
7564        my $have_grep = gitweb_check_feature('grep');
7565        if ($have_grep) {
7566                print <<EOT;
7567<dt><b>grep</b></dt>
7568<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7569    a different one) are searched for the given pattern. On large trees, this search can take
7570a while and put some strain on the server, so please use it with some consideration. Note that
7571due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7572case-sensitive.</dd>
7573EOT
7574        }
7575        print <<EOT;
7576<dt><b>author</b></dt>
7577<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7578<dt><b>committer</b></dt>
7579<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7580EOT
7581        my $have_pickaxe = gitweb_check_feature('pickaxe');
7582        if ($have_pickaxe) {
7583                print <<EOT;
7584<dt><b>pickaxe</b></dt>
7585<dd>All commits that caused the string to appear or disappear from any file (changes that
7586added, removed or "modified" the string) will be listed. This search can take a while and
7587takes a lot of strain on the server, so please use it wisely. Note that since you may be
7588interested even in changes just changing the case as well, this search is case sensitive.</dd>
7589EOT
7590        }
7591        print "</dl>\n";
7592        git_footer_html();
7593}
7594
7595sub git_shortlog {
7596        git_log_generic('shortlog', \&git_shortlog_body,
7597                        $hash, $hash_parent);
7598}
7599
7600## ......................................................................
7601## feeds (RSS, Atom; OPML)
7602
7603sub git_feed {
7604        my $format = shift || 'atom';
7605        my $have_blame = gitweb_check_feature('blame');
7606
7607        # Atom: http://www.atomenabled.org/developers/syndication/
7608        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7609        if ($format ne 'rss' && $format ne 'atom') {
7610                die_error(400, "Unknown web feed format");
7611        }
7612
7613        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7614        my $head = $hash || 'HEAD';
7615        my @commitlist = parse_commits($head, 150, 0, $file_name);
7616
7617        my %latest_commit;
7618        my %latest_date;
7619        my $content_type = "application/$format+xml";
7620        if (defined $cgi->http('HTTP_ACCEPT') &&
7621                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7622                # browser (feed reader) prefers text/xml
7623                $content_type = 'text/xml';
7624        }
7625        if (defined($commitlist[0])) {
7626                %latest_commit = %{$commitlist[0]};
7627                my $latest_epoch = $latest_commit{'committer_epoch'};
7628                %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7629                my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7630                if (defined $if_modified) {
7631                        my $since;
7632                        if (eval { require HTTP::Date; 1; }) {
7633                                $since = HTTP::Date::str2time($if_modified);
7634                        } elsif (eval { require Time::ParseDate; 1; }) {
7635                                $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7636                        }
7637                        if (defined $since && $latest_epoch <= $since) {
7638                                print $cgi->header(
7639                                        -type => $content_type,
7640                                        -charset => 'utf-8',
7641                                        -last_modified => $latest_date{'rfc2822'},
7642                                        -status => '304 Not Modified');
7643                                return;
7644                        }
7645                }
7646                print $cgi->header(
7647                        -type => $content_type,
7648                        -charset => 'utf-8',
7649                        -last_modified => $latest_date{'rfc2822'});
7650        } else {
7651                print $cgi->header(
7652                        -type => $content_type,
7653                        -charset => 'utf-8');
7654        }
7655
7656        # Optimization: skip generating the body if client asks only
7657        # for Last-Modified date.
7658        return if ($cgi->request_method() eq 'HEAD');
7659
7660        # header variables
7661        my $title = "$site_name - $project/$action";
7662        my $feed_type = 'log';
7663        if (defined $hash) {
7664                $title .= " - '$hash'";
7665                $feed_type = 'branch log';
7666                if (defined $file_name) {
7667                        $title .= " :: $file_name";
7668                        $feed_type = 'history';
7669                }
7670        } elsif (defined $file_name) {
7671                $title .= " - $file_name";
7672                $feed_type = 'history';
7673        }
7674        $title .= " $feed_type";
7675        my $descr = git_get_project_description($project);
7676        if (defined $descr) {
7677                $descr = esc_html($descr);
7678        } else {
7679                $descr = "$project " .
7680                         ($format eq 'rss' ? 'RSS' : 'Atom') .
7681                         " feed";
7682        }
7683        my $owner = git_get_project_owner($project);
7684        $owner = esc_html($owner);
7685
7686        #header
7687        my $alt_url;
7688        if (defined $file_name) {
7689                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7690        } elsif (defined $hash) {
7691                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7692        } else {
7693                $alt_url = href(-full=>1, action=>"summary");
7694        }
7695        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7696        if ($format eq 'rss') {
7697                print <<XML;
7698<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7699<channel>
7700XML
7701                print "<title>$title</title>\n" .
7702                      "<link>$alt_url</link>\n" .
7703                      "<description>$descr</description>\n" .
7704                      "<language>en</language>\n" .
7705                      # project owner is responsible for 'editorial' content
7706                      "<managingEditor>$owner</managingEditor>\n";
7707                if (defined $logo || defined $favicon) {
7708                        # prefer the logo to the favicon, since RSS
7709                        # doesn't allow both
7710                        my $img = esc_url($logo || $favicon);
7711                        print "<image>\n" .
7712                              "<url>$img</url>\n" .
7713                              "<title>$title</title>\n" .
7714                              "<link>$alt_url</link>\n" .
7715                              "</image>\n";
7716                }
7717                if (%latest_date) {
7718                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7719                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7720                }
7721                print "<generator>gitweb v.$version/$git_version</generator>\n";
7722        } elsif ($format eq 'atom') {
7723                print <<XML;
7724<feed xmlns="http://www.w3.org/2005/Atom">
7725XML
7726                print "<title>$title</title>\n" .
7727                      "<subtitle>$descr</subtitle>\n" .
7728                      '<link rel="alternate" type="text/html" href="' .
7729                      $alt_url . '" />' . "\n" .
7730                      '<link rel="self" type="' . $content_type . '" href="' .
7731                      $cgi->self_url() . '" />' . "\n" .
7732                      "<id>" . href(-full=>1) . "</id>\n" .
7733                      # use project owner for feed author
7734                      "<author><name>$owner</name></author>\n";
7735                if (defined $favicon) {
7736                        print "<icon>" . esc_url($favicon) . "</icon>\n";
7737                }
7738                if (defined $logo) {
7739                        # not twice as wide as tall: 72 x 27 pixels
7740                        print "<logo>" . esc_url($logo) . "</logo>\n";
7741                }
7742                if (! %latest_date) {
7743                        # dummy date to keep the feed valid until commits trickle in:
7744                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
7745                } else {
7746                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
7747                }
7748                print "<generator version='$version/$git_version'>gitweb</generator>\n";
7749        }
7750
7751        # contents
7752        for (my $i = 0; $i <= $#commitlist; $i++) {
7753                my %co = %{$commitlist[$i]};
7754                my $commit = $co{'id'};
7755                # we read 150, we always show 30 and the ones more recent than 48 hours
7756                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7757                        last;
7758                }
7759                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7760
7761                # get list of changed files
7762                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7763                        $co{'parent'} || "--root",
7764                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
7765                        or next;
7766                my @difftree = map { chomp; $_ } <$fd>;
7767                close $fd
7768                        or next;
7769
7770                # print element (entry, item)
7771                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7772                if ($format eq 'rss') {
7773                        print "<item>\n" .
7774                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
7775                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
7776                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7777                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7778                              "<link>$co_url</link>\n" .
7779                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
7780                              "<content:encoded>" .
7781                              "<![CDATA[\n";
7782                } elsif ($format eq 'atom') {
7783                        print "<entry>\n" .
7784                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7785                              "<updated>$cd{'iso-8601'}</updated>\n" .
7786                              "<author>\n" .
7787                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7788                        if ($co{'author_email'}) {
7789                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7790                        }
7791                        print "</author>\n" .
7792                              # use committer for contributor
7793                              "<contributor>\n" .
7794                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7795                        if ($co{'committer_email'}) {
7796                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7797                        }
7798                        print "</contributor>\n" .
7799                              "<published>$cd{'iso-8601'}</published>\n" .
7800                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7801                              "<id>$co_url</id>\n" .
7802                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7803                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7804                }
7805                my $comment = $co{'comment'};
7806                print "<pre>\n";
7807                foreach my $line (@$comment) {
7808                        $line = esc_html($line);
7809                        print "$line\n";
7810                }
7811                print "</pre><ul>\n";
7812                foreach my $difftree_line (@difftree) {
7813                        my %difftree = parse_difftree_raw_line($difftree_line);
7814                        next if !$difftree{'from_id'};
7815
7816                        my $file = $difftree{'file'} || $difftree{'to_file'};
7817
7818                        print "<li>" .
7819                              "[" .
7820                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7821                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7822                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7823                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
7824                                      -title => "diff"}, 'D');
7825                        if ($have_blame) {
7826                                print $cgi->a({-href => href(-full=>1, action=>"blame",
7827                                                             file_name=>$file, hash_base=>$commit),
7828                                              -title => "blame"}, 'B');
7829                        }
7830                        # if this is not a feed of a file history
7831                        if (!defined $file_name || $file_name ne $file) {
7832                                print $cgi->a({-href => href(-full=>1, action=>"history",
7833                                                             file_name=>$file, hash=>$commit),
7834                                              -title => "history"}, 'H');
7835                        }
7836                        $file = esc_path($file);
7837                        print "] ".
7838                              "$file</li>\n";
7839                }
7840                if ($format eq 'rss') {
7841                        print "</ul>]]>\n" .
7842                              "</content:encoded>\n" .
7843                              "</item>\n";
7844                } elsif ($format eq 'atom') {
7845                        print "</ul>\n</div>\n" .
7846                              "</content>\n" .
7847                              "</entry>\n";
7848                }
7849        }
7850
7851        # end of feed
7852        if ($format eq 'rss') {
7853                print "</channel>\n</rss>\n";
7854        } elsif ($format eq 'atom') {
7855                print "</feed>\n";
7856        }
7857}
7858
7859sub git_rss {
7860        git_feed('rss');
7861}
7862
7863sub git_atom {
7864        git_feed('atom');
7865}
7866
7867sub git_opml {
7868        my @list = git_get_projects_list();
7869        if (!@list) {
7870                die_error(404, "No projects found");
7871        }
7872
7873        print $cgi->header(
7874                -type => 'text/xml',
7875                -charset => 'utf-8',
7876                -content_disposition => 'inline; filename="opml.xml"');
7877
7878        my $title = esc_html($site_name);
7879        print <<XML;
7880<?xml version="1.0" encoding="utf-8"?>
7881<opml version="1.0">
7882<head>
7883  <title>$title OPML Export</title>
7884</head>
7885<body>
7886<outline text="git RSS feeds">
7887XML
7888
7889        foreach my $pr (@list) {
7890                my %proj = %$pr;
7891                my $head = git_get_head_hash($proj{'path'});
7892                if (!defined $head) {
7893                        next;
7894                }
7895                $git_dir = "$projectroot/$proj{'path'}";
7896                my %co = parse_commit($head);
7897                if (!%co) {
7898                        next;
7899                }
7900
7901                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7902                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7903                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7904                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7905        }
7906        print <<XML;
7907</outline>
7908</body>
7909</opml>
7910XML
7911}