390774ed93a01300947171dfba045084188000a8
   1#!/usr/bin/perl
   2
   3# gitweb - simple web interface to track changes in git repositories
   4#
   5# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6# (C) 2005, Christian Gierke
   7#
   8# This program is licensed under the GPLv2
   9
  10use 5.008;
  11use strict;
  12use warnings;
  13use CGI qw(:standard :escapeHTML -nosticky);
  14use CGI::Util qw(unescape);
  15use CGI::Carp qw(fatalsToBrowser set_message);
  16use Encode;
  17use Fcntl ':mode';
  18use File::Find qw();
  19use File::Basename qw(basename);
  20use Time::HiRes qw(gettimeofday tv_interval);
  21binmode STDOUT, ':utf8';
  22
  23our $t0 = [ gettimeofday() ];
  24our $number_of_git_cmds = 0;
  25
  26BEGIN {
  27        CGI->compile() if $ENV{'MOD_PERL'};
  28}
  29
  30our $version = "++GIT_VERSION++";
  31
  32our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33sub evaluate_uri {
  34        our $cgi;
  35
  36        our $my_url = $cgi->url();
  37        our $my_uri = $cgi->url(-absolute => 1);
  38
  39        # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40        # needed and used only for URLs with nonempty PATH_INFO
  41        our $base_url = $my_url;
  42
  43        # When the script is used as DirectoryIndex, the URL does not contain the name
  44        # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45        # have to do it ourselves. We make $path_info global because it's also used
  46        # later on.
  47        #
  48        # Another issue with the script being the DirectoryIndex is that the resulting
  49        # $my_url data is not the full script URL: this is good, because we want
  50        # generated links to keep implying the script name if it wasn't explicitly
  51        # indicated in the URL we're handling, but it means that $my_url cannot be used
  52        # as base URL.
  53        # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54        # to build the base URL ourselves:
  55        our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56        if ($path_info) {
  57                if ($my_url =~ s,\Q$path_info\E$,, &&
  58                    $my_uri =~ s,\Q$path_info\E$,, &&
  59                    defined $ENV{'SCRIPT_NAME'}) {
  60                        $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  61                }
  62        }
  63
  64        # target of the home link on top of all pages
  65        our $home_link = $my_uri || "/";
  66}
  67
  68# core git executable to use
  69# this can just be "git" if your webserver has a sensible PATH
  70our $GIT = "++GIT_BINDIR++/git";
  71
  72# absolute fs-path which will be prepended to the project path
  73#our $projectroot = "/pub/scm";
  74our $projectroot = "++GITWEB_PROJECTROOT++";
  75
  76# fs traversing limit for getting project list
  77# the number is relative to the projectroot
  78our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  79
  80# string of the home link on top of all pages
  81our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  82
  83# name of your site or organization to appear in page titles
  84# replace this with something more descriptive for clearer bookmarks
  85our $site_name = "++GITWEB_SITENAME++"
  86                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  87
  88# html snippet to include in the <head> section of each page
  89our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  90# filename of html text to include at top of each page
  91our $site_header = "++GITWEB_SITE_HEADER++";
  92# html text to include at home page
  93our $home_text = "++GITWEB_HOMETEXT++";
  94# filename of html text to include at bottom of each page
  95our $site_footer = "++GITWEB_SITE_FOOTER++";
  96
  97# URI of stylesheets
  98our @stylesheets = ("++GITWEB_CSS++");
  99# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 100our $stylesheet = undef;
 101# URI of GIT logo (72x27 size)
 102our $logo = "++GITWEB_LOGO++";
 103# URI of GIT favicon, assumed to be image/png type
 104our $favicon = "++GITWEB_FAVICON++";
 105# URI of gitweb.js (JavaScript code for gitweb)
 106our $javascript = "++GITWEB_JS++";
 107
 108# URI and label (title) of GIT logo link
 109#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 110#our $logo_label = "git documentation";
 111our $logo_url = "http://git-scm.com/";
 112our $logo_label = "git homepage";
 113
 114# source of projects list
 115our $projects_list = "++GITWEB_LIST++";
 116
 117# the width (in characters) of the projects list "Description" column
 118our $projects_list_description_width = 25;
 119
 120# group projects by category on the projects list
 121# (enabled if this variable evaluates to true)
 122our $projects_list_group_categories = 0;
 123
 124# default category if none specified
 125# (leave the empty string for no category)
 126our $project_list_default_category = "";
 127
 128# default order of projects list
 129# valid values are none, project, descr, owner, and age
 130our $default_projects_order = "project";
 131
 132# show repository only if this file exists
 133# (only effective if this variable evaluates to true)
 134our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136# show repository only if this subroutine returns true
 137# when given the path to the project, for example:
 138#    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139our $export_auth_hook = undef;
 140
 141# only allow viewing of repositories also shown on the overview page
 142our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144# list of git base URLs used for URL to where fetch project from,
 145# i.e. full URL is "$git_base_url/$project"
 146our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148# default blob_plain mimetype and default charset for text/plain blob
 149our $default_blob_plain_mimetype = 'text/plain';
 150our $default_text_plain_charset  = undef;
 151
 152# file to use for guessing MIME types before trying /etc/mime.types
 153# (relative to the current git repository)
 154our $mimetypes_file = undef;
 155
 156# assume this charset if line contains non-UTF-8 characters;
 157# it should be valid encoding (see Encoding::Supported(3pm) for list),
 158# for which encoding all byte sequences are valid, for example
 159# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160# could be even 'utf-8' for the old behavior)
 161our $fallback_encoding = 'latin1';
 162
 163# rename detection options for git-diff and git-diff-tree
 164# - default is '-M', with the cost proportional to
 165#   (number of removed files) * (number of new files).
 166# - more costly is '-C' (which implies '-M'), with the cost proportional to
 167#   (number of changed files + number of removed files) * (number of new files)
 168# - even more costly is '-C', '--find-copies-harder' with cost
 169#   (number of files in the original tree) * (number of new files)
 170# - one might want to include '-B' option, e.g. '-B', '-M'
 171our @diff_opts = ('-M'); # taken from git_commit
 172
 173# Disables features that would allow repository owners to inject script into
 174# the gitweb domain.
 175our $prevent_xss = 0;
 176
 177# Path to the highlight executable to use (must be the one from
 178# http://www.andre-simon.de due to assumptions about parameters and output).
 179# Useful if highlight is not installed on your webserver's PATH.
 180# [Default: highlight]
 181our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183# information about snapshot formats that gitweb is capable of serving
 184our %known_snapshot_formats = (
 185        # name => {
 186        #       'display' => display name,
 187        #       'type' => mime type,
 188        #       'suffix' => filename suffix,
 189        #       'format' => --format for git-archive,
 190        #       'compressor' => [compressor command and arguments]
 191        #                       (array reference, optional)
 192        #       'disabled' => boolean (optional)}
 193        #
 194        'tgz' => {
 195                'display' => 'tar.gz',
 196                'type' => 'application/x-gzip',
 197                'suffix' => '.tar.gz',
 198                'format' => 'tar',
 199                'compressor' => ['gzip', '-n']},
 200
 201        'tbz2' => {
 202                'display' => 'tar.bz2',
 203                'type' => 'application/x-bzip2',
 204                'suffix' => '.tar.bz2',
 205                'format' => 'tar',
 206                'compressor' => ['bzip2']},
 207
 208        'txz' => {
 209                'display' => 'tar.xz',
 210                'type' => 'application/x-xz',
 211                'suffix' => '.tar.xz',
 212                'format' => 'tar',
 213                'compressor' => ['xz'],
 214                'disabled' => 1},
 215
 216        'zip' => {
 217                'display' => 'zip',
 218                'type' => 'application/x-zip',
 219                'suffix' => '.zip',
 220                'format' => 'zip'},
 221);
 222
 223# Aliases so we understand old gitweb.snapshot values in repository
 224# configuration.
 225our %known_snapshot_format_aliases = (
 226        'gzip'  => 'tgz',
 227        'bzip2' => 'tbz2',
 228        'xz'    => 'txz',
 229
 230        # backward compatibility: legacy gitweb config support
 231        'x-gzip' => undef, 'gz' => undef,
 232        'x-bzip2' => undef, 'bz2' => undef,
 233        'x-zip' => undef, '' => undef,
 234);
 235
 236# Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237# are changed, it may be appropriate to change these values too via
 238# $GITWEB_CONFIG.
 239our %avatar_size = (
 240        'default' => 16,
 241        'double'  => 32
 242);
 243
 244# Used to set the maximum load that we will still respond to gitweb queries.
 245# If server load exceed this value then return "503 server busy" error.
 246# If gitweb cannot determined server load, it is taken to be 0.
 247# Leave it undefined (or set to 'undef') to turn off load checking.
 248our $maxload = 300;
 249
 250# configuration for 'highlight' (http://www.andre-simon.de/)
 251# match by basename
 252our %highlight_basename = (
 253        #'Program' => 'py',
 254        #'Library' => 'py',
 255        'SConstruct' => 'py', # SCons equivalent of Makefile
 256        'Makefile' => 'make',
 257);
 258# match by extension
 259our %highlight_ext = (
 260        # main extensions, defining name of syntax;
 261        # see files in /usr/share/highlight/langDefs/ directory
 262        map { $_ => $_ }
 263                qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 264        # alternate extensions, see /etc/highlight/filetypes.conf
 265        'h' => 'c',
 266        map { $_ => 'sh'  } qw(bash zsh ksh),
 267        map { $_ => 'cpp' } qw(cxx c++ cc),
 268        map { $_ => 'php' } qw(php3 php4 php5 phps),
 269        map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 270        map { $_ => 'make'} qw(mak mk),
 271        map { $_ => 'xml' } qw(xhtml html htm),
 272);
 273
 274# You define site-wide feature defaults here; override them with
 275# $GITWEB_CONFIG as necessary.
 276our %feature = (
 277        # feature => {
 278        #       'sub' => feature-sub (subroutine),
 279        #       'override' => allow-override (boolean),
 280        #       'default' => [ default options...] (array reference)}
 281        #
 282        # if feature is overridable (it means that allow-override has true value),
 283        # then feature-sub will be called with default options as parameters;
 284        # return value of feature-sub indicates if to enable specified feature
 285        #
 286        # if there is no 'sub' key (no feature-sub), then feature cannot be
 287        # overridden
 288        #
 289        # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 290        # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 291        # is enabled
 292
 293        # Enable the 'blame' blob view, showing the last commit that modified
 294        # each line in the file. This can be very CPU-intensive.
 295
 296        # To enable system wide have in $GITWEB_CONFIG
 297        # $feature{'blame'}{'default'} = [1];
 298        # To have project specific config enable override in $GITWEB_CONFIG
 299        # $feature{'blame'}{'override'} = 1;
 300        # and in project config gitweb.blame = 0|1;
 301        'blame' => {
 302                'sub' => sub { feature_bool('blame', @_) },
 303                'override' => 0,
 304                'default' => [0]},
 305
 306        # Enable the 'snapshot' link, providing a compressed archive of any
 307        # tree. This can potentially generate high traffic if you have large
 308        # project.
 309
 310        # Value is a list of formats defined in %known_snapshot_formats that
 311        # you wish to offer.
 312        # To disable system wide have in $GITWEB_CONFIG
 313        # $feature{'snapshot'}{'default'} = [];
 314        # To have project specific config enable override in $GITWEB_CONFIG
 315        # $feature{'snapshot'}{'override'} = 1;
 316        # and in project config, a comma-separated list of formats or "none"
 317        # to disable.  Example: gitweb.snapshot = tbz2,zip;
 318        'snapshot' => {
 319                'sub' => \&feature_snapshot,
 320                'override' => 0,
 321                'default' => ['tgz']},
 322
 323        # Enable text search, which will list the commits which match author,
 324        # committer or commit text to a given string.  Enabled by default.
 325        # Project specific override is not supported.
 326        #
 327        # Note that this controls all search features, which means that if
 328        # it is disabled, then 'grep' and 'pickaxe' search would also be
 329        # disabled.
 330        'search' => {
 331                'override' => 0,
 332                'default' => [1]},
 333
 334        # Enable grep search, which will list the files in currently selected
 335        # tree containing the given string. Enabled by default. This can be
 336        # potentially CPU-intensive, of course.
 337        # Note that you need to have 'search' feature enabled too.
 338
 339        # To enable system wide have in $GITWEB_CONFIG
 340        # $feature{'grep'}{'default'} = [1];
 341        # To have project specific config enable override in $GITWEB_CONFIG
 342        # $feature{'grep'}{'override'} = 1;
 343        # and in project config gitweb.grep = 0|1;
 344        'grep' => {
 345                'sub' => sub { feature_bool('grep', @_) },
 346                'override' => 0,
 347                'default' => [1]},
 348
 349        # Enable the pickaxe search, which will list the commits that modified
 350        # a given string in a file. This can be practical and quite faster
 351        # alternative to 'blame', but still potentially CPU-intensive.
 352        # Note that you need to have 'search' feature enabled too.
 353
 354        # To enable system wide have in $GITWEB_CONFIG
 355        # $feature{'pickaxe'}{'default'} = [1];
 356        # To have project specific config enable override in $GITWEB_CONFIG
 357        # $feature{'pickaxe'}{'override'} = 1;
 358        # and in project config gitweb.pickaxe = 0|1;
 359        'pickaxe' => {
 360                'sub' => sub { feature_bool('pickaxe', @_) },
 361                'override' => 0,
 362                'default' => [1]},
 363
 364        # Enable showing size of blobs in a 'tree' view, in a separate
 365        # column, similar to what 'ls -l' does.  This cost a bit of IO.
 366
 367        # To disable system wide have in $GITWEB_CONFIG
 368        # $feature{'show-sizes'}{'default'} = [0];
 369        # To have project specific config enable override in $GITWEB_CONFIG
 370        # $feature{'show-sizes'}{'override'} = 1;
 371        # and in project config gitweb.showsizes = 0|1;
 372        'show-sizes' => {
 373                'sub' => sub { feature_bool('showsizes', @_) },
 374                'override' => 0,
 375                'default' => [1]},
 376
 377        # Make gitweb use an alternative format of the URLs which can be
 378        # more readable and natural-looking: project name is embedded
 379        # directly in the path and the query string contains other
 380        # auxiliary information. All gitweb installations recognize
 381        # URL in either format; this configures in which formats gitweb
 382        # generates links.
 383
 384        # To enable system wide have in $GITWEB_CONFIG
 385        # $feature{'pathinfo'}{'default'} = [1];
 386        # Project specific override is not supported.
 387
 388        # Note that you will need to change the default location of CSS,
 389        # favicon, logo and possibly other files to an absolute URL. Also,
 390        # if gitweb.cgi serves as your indexfile, you will need to force
 391        # $my_uri to contain the script name in your $GITWEB_CONFIG.
 392        'pathinfo' => {
 393                'override' => 0,
 394                'default' => [0]},
 395
 396        # Make gitweb consider projects in project root subdirectories
 397        # to be forks of existing projects. Given project $projname.git,
 398        # projects matching $projname/*.git will not be shown in the main
 399        # projects list, instead a '+' mark will be added to $projname
 400        # there and a 'forks' view will be enabled for the project, listing
 401        # all the forks. If project list is taken from a file, forks have
 402        # to be listed after the main project.
 403
 404        # To enable system wide have in $GITWEB_CONFIG
 405        # $feature{'forks'}{'default'} = [1];
 406        # Project specific override is not supported.
 407        'forks' => {
 408                'override' => 0,
 409                'default' => [0]},
 410
 411        # Insert custom links to the action bar of all project pages.
 412        # This enables you mainly to link to third-party scripts integrating
 413        # into gitweb; e.g. git-browser for graphical history representation
 414        # or custom web-based repository administration interface.
 415
 416        # The 'default' value consists of a list of triplets in the form
 417        # (label, link, position) where position is the label after which
 418        # to insert the link and link is a format string where %n expands
 419        # to the project name, %f to the project path within the filesystem,
 420        # %h to the current hash (h gitweb parameter) and %b to the current
 421        # hash base (hb gitweb parameter); %% expands to %.
 422
 423        # To enable system wide have in $GITWEB_CONFIG e.g.
 424        # $feature{'actions'}{'default'} = [('graphiclog',
 425        #       '/git-browser/by-commit.html?r=%n', 'summary')];
 426        # Project specific override is not supported.
 427        'actions' => {
 428                'override' => 0,
 429                'default' => []},
 430
 431        # Allow gitweb scan project content tags of project repository,
 432        # and display the popular Web 2.0-ish "tag cloud" near the projects
 433        # list.  Note that this is something COMPLETELY different from the
 434        # normal Git tags.
 435
 436        # gitweb by itself can show existing tags, but it does not handle
 437        # tagging itself; you need to do it externally, outside gitweb.
 438        # The format is described in git_get_project_ctags() subroutine.
 439        # You may want to install the HTML::TagCloud Perl module to get
 440        # a pretty tag cloud instead of just a list of tags.
 441
 442        # To enable system wide have in $GITWEB_CONFIG
 443        # $feature{'ctags'}{'default'} = [1];
 444        # Project specific override is not supported.
 445
 446        # In the future whether ctags editing is enabled might depend
 447        # on the value, but using 1 should always mean no editing of ctags.
 448        'ctags' => {
 449                'override' => 0,
 450                'default' => [0]},
 451
 452        # The maximum number of patches in a patchset generated in patch
 453        # view. Set this to 0 or undef to disable patch view, or to a
 454        # negative number to remove any limit.
 455
 456        # To disable system wide have in $GITWEB_CONFIG
 457        # $feature{'patches'}{'default'} = [0];
 458        # To have project specific config enable override in $GITWEB_CONFIG
 459        # $feature{'patches'}{'override'} = 1;
 460        # and in project config gitweb.patches = 0|n;
 461        # where n is the maximum number of patches allowed in a patchset.
 462        'patches' => {
 463                'sub' => \&feature_patches,
 464                'override' => 0,
 465                'default' => [16]},
 466
 467        # Avatar support. When this feature is enabled, views such as
 468        # shortlog or commit will display an avatar associated with
 469        # the email of the committer(s) and/or author(s).
 470
 471        # Currently available providers are gravatar and picon.
 472        # If an unknown provider is specified, the feature is disabled.
 473
 474        # Gravatar depends on Digest::MD5.
 475        # Picon currently relies on the indiana.edu database.
 476
 477        # To enable system wide have in $GITWEB_CONFIG
 478        # $feature{'avatar'}{'default'} = ['<provider>'];
 479        # where <provider> is either gravatar or picon.
 480        # To have project specific config enable override in $GITWEB_CONFIG
 481        # $feature{'avatar'}{'override'} = 1;
 482        # and in project config gitweb.avatar = <provider>;
 483        'avatar' => {
 484                'sub' => \&feature_avatar,
 485                'override' => 0,
 486                'default' => ['']},
 487
 488        # Enable displaying how much time and how many git commands
 489        # it took to generate and display page.  Disabled by default.
 490        # Project specific override is not supported.
 491        'timed' => {
 492                'override' => 0,
 493                'default' => [0]},
 494
 495        # Enable turning some links into links to actions which require
 496        # JavaScript to run (like 'blame_incremental').  Not enabled by
 497        # default.  Project specific override is currently not supported.
 498        'javascript-actions' => {
 499                'override' => 0,
 500                'default' => [0]},
 501
 502        # Enable and configure ability to change common timezone for dates
 503        # in gitweb output via JavaScript.  Enabled by default.
 504        # Project specific override is not supported.
 505        'javascript-timezone' => {
 506                'override' => 0,
 507                'default' => [
 508                        'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 509                                     # or undef to turn off this feature
 510                        'gitweb_tz', # name of cookie where to store selected timezone
 511                        'datetime',  # CSS class used to mark up dates for manipulation
 512                ]},
 513
 514        # Syntax highlighting support. This is based on Daniel Svensson's
 515        # and Sham Chukoury's work in gitweb-xmms2.git.
 516        # It requires the 'highlight' program present in $PATH,
 517        # and therefore is disabled by default.
 518
 519        # To enable system wide have in $GITWEB_CONFIG
 520        # $feature{'highlight'}{'default'} = [1];
 521
 522        'highlight' => {
 523                'sub' => sub { feature_bool('highlight', @_) },
 524                'override' => 0,
 525                'default' => [0]},
 526
 527        # Enable displaying of remote heads in the heads list
 528
 529        # To enable system wide have in $GITWEB_CONFIG
 530        # $feature{'remote_heads'}{'default'} = [1];
 531        # To have project specific config enable override in $GITWEB_CONFIG
 532        # $feature{'remote_heads'}{'override'} = 1;
 533        # and in project config gitweb.remote_heads = 0|1;
 534        'remote_heads' => {
 535                'sub' => sub { feature_bool('remote_heads', @_) },
 536                'override' => 0,
 537                'default' => [0]},
 538);
 539
 540sub gitweb_get_feature {
 541        my ($name) = @_;
 542        return unless exists $feature{$name};
 543        my ($sub, $override, @defaults) = (
 544                $feature{$name}{'sub'},
 545                $feature{$name}{'override'},
 546                @{$feature{$name}{'default'}});
 547        # project specific override is possible only if we have project
 548        our $git_dir; # global variable, declared later
 549        if (!$override || !defined $git_dir) {
 550                return @defaults;
 551        }
 552        if (!defined $sub) {
 553                warn "feature $name is not overridable";
 554                return @defaults;
 555        }
 556        return $sub->(@defaults);
 557}
 558
 559# A wrapper to check if a given feature is enabled.
 560# With this, you can say
 561#
 562#   my $bool_feat = gitweb_check_feature('bool_feat');
 563#   gitweb_check_feature('bool_feat') or somecode;
 564#
 565# instead of
 566#
 567#   my ($bool_feat) = gitweb_get_feature('bool_feat');
 568#   (gitweb_get_feature('bool_feat'))[0] or somecode;
 569#
 570sub gitweb_check_feature {
 571        return (gitweb_get_feature(@_))[0];
 572}
 573
 574
 575sub feature_bool {
 576        my $key = shift;
 577        my ($val) = git_get_project_config($key, '--bool');
 578
 579        if (!defined $val) {
 580                return ($_[0]);
 581        } elsif ($val eq 'true') {
 582                return (1);
 583        } elsif ($val eq 'false') {
 584                return (0);
 585        }
 586}
 587
 588sub feature_snapshot {
 589        my (@fmts) = @_;
 590
 591        my ($val) = git_get_project_config('snapshot');
 592
 593        if ($val) {
 594                @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 595        }
 596
 597        return @fmts;
 598}
 599
 600sub feature_patches {
 601        my @val = (git_get_project_config('patches', '--int'));
 602
 603        if (@val) {
 604                return @val;
 605        }
 606
 607        return ($_[0]);
 608}
 609
 610sub feature_avatar {
 611        my @val = (git_get_project_config('avatar'));
 612
 613        return @val ? @val : @_;
 614}
 615
 616# checking HEAD file with -e is fragile if the repository was
 617# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 618# and then pruned.
 619sub check_head_link {
 620        my ($dir) = @_;
 621        my $headfile = "$dir/HEAD";
 622        return ((-e $headfile) ||
 623                (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 624}
 625
 626sub check_export_ok {
 627        my ($dir) = @_;
 628        return (check_head_link($dir) &&
 629                (!$export_ok || -e "$dir/$export_ok") &&
 630                (!$export_auth_hook || $export_auth_hook->($dir)));
 631}
 632
 633# process alternate names for backward compatibility
 634# filter out unsupported (unknown) snapshot formats
 635sub filter_snapshot_fmts {
 636        my @fmts = @_;
 637
 638        @fmts = map {
 639                exists $known_snapshot_format_aliases{$_} ?
 640                       $known_snapshot_format_aliases{$_} : $_} @fmts;
 641        @fmts = grep {
 642                exists $known_snapshot_formats{$_} &&
 643                !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 644}
 645
 646# If it is set to code reference, it is code that it is to be run once per
 647# request, allowing updating configurations that change with each request,
 648# while running other code in config file only once.
 649#
 650# Otherwise, if it is false then gitweb would process config file only once;
 651# if it is true then gitweb config would be run for each request.
 652our $per_request_config = 1;
 653
 654# read and parse gitweb config file given by its parameter.
 655# returns true on success, false on recoverable error, allowing
 656# to chain this subroutine, using first file that exists.
 657# dies on errors during parsing config file, as it is unrecoverable.
 658sub read_config_file {
 659        my $filename = shift;
 660        return unless defined $filename;
 661        # die if there are errors parsing config file
 662        if (-e $filename) {
 663                do $filename;
 664                die $@ if $@;
 665                return 1;
 666        }
 667        return;
 668}
 669
 670our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 671sub evaluate_gitweb_config {
 672        our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 673        our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 674        our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 675
 676        # Protect agains duplications of file names, to not read config twice.
 677        # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 678        # there possibility of duplication of filename there doesn't matter.
 679        $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 680        $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 681
 682        # Common system-wide settings for convenience.
 683        # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 684        read_config_file($GITWEB_CONFIG_COMMON);
 685
 686        # Use first config file that exists.  This means use the per-instance
 687        # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 688        read_config_file($GITWEB_CONFIG) and return;
 689        read_config_file($GITWEB_CONFIG_SYSTEM);
 690}
 691
 692# Get loadavg of system, to compare against $maxload.
 693# Currently it requires '/proc/loadavg' present to get loadavg;
 694# if it is not present it returns 0, which means no load checking.
 695sub get_loadavg {
 696        if( -e '/proc/loadavg' ){
 697                open my $fd, '<', '/proc/loadavg'
 698                        or return 0;
 699                my @load = split(/\s+/, scalar <$fd>);
 700                close $fd;
 701
 702                # The first three columns measure CPU and IO utilization of the last one,
 703                # five, and 10 minute periods.  The fourth column shows the number of
 704                # currently running processes and the total number of processes in the m/n
 705                # format.  The last column displays the last process ID used.
 706                return $load[0] || 0;
 707        }
 708        # additional checks for load average should go here for things that don't export
 709        # /proc/loadavg
 710
 711        return 0;
 712}
 713
 714# version of the core git binary
 715our $git_version;
 716sub evaluate_git_version {
 717        our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 718        $number_of_git_cmds++;
 719}
 720
 721sub check_loadavg {
 722        if (defined $maxload && get_loadavg() > $maxload) {
 723                die_error(503, "The load average on the server is too high");
 724        }
 725}
 726
 727# ======================================================================
 728# input validation and dispatch
 729
 730# input parameters can be collected from a variety of sources (presently, CGI
 731# and PATH_INFO), so we define an %input_params hash that collects them all
 732# together during validation: this allows subsequent uses (e.g. href()) to be
 733# agnostic of the parameter origin
 734
 735our %input_params = ();
 736
 737# input parameters are stored with the long parameter name as key. This will
 738# also be used in the href subroutine to convert parameters to their CGI
 739# equivalent, and since the href() usage is the most frequent one, we store
 740# the name -> CGI key mapping here, instead of the reverse.
 741#
 742# XXX: Warning: If you touch this, check the search form for updating,
 743# too.
 744
 745our @cgi_param_mapping = (
 746        project => "p",
 747        action => "a",
 748        file_name => "f",
 749        file_parent => "fp",
 750        hash => "h",
 751        hash_parent => "hp",
 752        hash_base => "hb",
 753        hash_parent_base => "hpb",
 754        page => "pg",
 755        order => "o",
 756        searchtext => "s",
 757        searchtype => "st",
 758        snapshot_format => "sf",
 759        extra_options => "opt",
 760        search_use_regexp => "sr",
 761        ctag => "by_tag",
 762        diff_style => "ds",
 763        project_filter => "pf",
 764        # this must be last entry (for manipulation from JavaScript)
 765        javascript => "js"
 766);
 767our %cgi_param_mapping = @cgi_param_mapping;
 768
 769# we will also need to know the possible actions, for validation
 770our %actions = (
 771        "blame" => \&git_blame,
 772        "blame_incremental" => \&git_blame_incremental,
 773        "blame_data" => \&git_blame_data,
 774        "blobdiff" => \&git_blobdiff,
 775        "blobdiff_plain" => \&git_blobdiff_plain,
 776        "blob" => \&git_blob,
 777        "blob_plain" => \&git_blob_plain,
 778        "commitdiff" => \&git_commitdiff,
 779        "commitdiff_plain" => \&git_commitdiff_plain,
 780        "commit" => \&git_commit,
 781        "forks" => \&git_forks,
 782        "heads" => \&git_heads,
 783        "history" => \&git_history,
 784        "log" => \&git_log,
 785        "patch" => \&git_patch,
 786        "patches" => \&git_patches,
 787        "remotes" => \&git_remotes,
 788        "rss" => \&git_rss,
 789        "atom" => \&git_atom,
 790        "search" => \&git_search,
 791        "search_help" => \&git_search_help,
 792        "shortlog" => \&git_shortlog,
 793        "summary" => \&git_summary,
 794        "tag" => \&git_tag,
 795        "tags" => \&git_tags,
 796        "tree" => \&git_tree,
 797        "snapshot" => \&git_snapshot,
 798        "object" => \&git_object,
 799        # those below don't need $project
 800        "opml" => \&git_opml,
 801        "project_list" => \&git_project_list,
 802        "project_index" => \&git_project_index,
 803);
 804
 805# finally, we have the hash of allowed extra_options for the commands that
 806# allow them
 807our %allowed_options = (
 808        "--no-merges" => [ qw(rss atom log shortlog history) ],
 809);
 810
 811# fill %input_params with the CGI parameters. All values except for 'opt'
 812# should be single values, but opt can be an array. We should probably
 813# build an array of parameters that can be multi-valued, but since for the time
 814# being it's only this one, we just single it out
 815sub evaluate_query_params {
 816        our $cgi;
 817
 818        while (my ($name, $symbol) = each %cgi_param_mapping) {
 819                if ($symbol eq 'opt') {
 820                        $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 821                } else {
 822                        $input_params{$name} = decode_utf8($cgi->param($symbol));
 823                }
 824        }
 825}
 826
 827# now read PATH_INFO and update the parameter list for missing parameters
 828sub evaluate_path_info {
 829        return if defined $input_params{'project'};
 830        return if !$path_info;
 831        $path_info =~ s,^/+,,;
 832        return if !$path_info;
 833
 834        # find which part of PATH_INFO is project
 835        my $project = $path_info;
 836        $project =~ s,/+$,,;
 837        while ($project && !check_head_link("$projectroot/$project")) {
 838                $project =~ s,/*[^/]*$,,;
 839        }
 840        return unless $project;
 841        $input_params{'project'} = $project;
 842
 843        # do not change any parameters if an action is given using the query string
 844        return if $input_params{'action'};
 845        $path_info =~ s,^\Q$project\E/*,,;
 846
 847        # next, check if we have an action
 848        my $action = $path_info;
 849        $action =~ s,/.*$,,;
 850        if (exists $actions{$action}) {
 851                $path_info =~ s,^$action/*,,;
 852                $input_params{'action'} = $action;
 853        }
 854
 855        # list of actions that want hash_base instead of hash, but can have no
 856        # pathname (f) parameter
 857        my @wants_base = (
 858                'tree',
 859                'history',
 860        );
 861
 862        # we want to catch, among others
 863        # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 864        my ($parentrefname, $parentpathname, $refname, $pathname) =
 865                ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 866
 867        # first, analyze the 'current' part
 868        if (defined $pathname) {
 869                # we got "branch:filename" or "branch:dir/"
 870                # we could use git_get_type(branch:pathname), but:
 871                # - it needs $git_dir
 872                # - it does a git() call
 873                # - the convention of terminating directories with a slash
 874                #   makes it superfluous
 875                # - embedding the action in the PATH_INFO would make it even
 876                #   more superfluous
 877                $pathname =~ s,^/+,,;
 878                if (!$pathname || substr($pathname, -1) eq "/") {
 879                        $input_params{'action'} ||= "tree";
 880                        $pathname =~ s,/$,,;
 881                } else {
 882                        # the default action depends on whether we had parent info
 883                        # or not
 884                        if ($parentrefname) {
 885                                $input_params{'action'} ||= "blobdiff_plain";
 886                        } else {
 887                                $input_params{'action'} ||= "blob_plain";
 888                        }
 889                }
 890                $input_params{'hash_base'} ||= $refname;
 891                $input_params{'file_name'} ||= $pathname;
 892        } elsif (defined $refname) {
 893                # we got "branch". In this case we have to choose if we have to
 894                # set hash or hash_base.
 895                #
 896                # Most of the actions without a pathname only want hash to be
 897                # set, except for the ones specified in @wants_base that want
 898                # hash_base instead. It should also be noted that hand-crafted
 899                # links having 'history' as an action and no pathname or hash
 900                # set will fail, but that happens regardless of PATH_INFO.
 901                if (defined $parentrefname) {
 902                        # if there is parent let the default be 'shortlog' action
 903                        # (for http://git.example.com/repo.git/A..B links); if there
 904                        # is no parent, dispatch will detect type of object and set
 905                        # action appropriately if required (if action is not set)
 906                        $input_params{'action'} ||= "shortlog";
 907                }
 908                if ($input_params{'action'} &&
 909                    grep { $_ eq $input_params{'action'} } @wants_base) {
 910                        $input_params{'hash_base'} ||= $refname;
 911                } else {
 912                        $input_params{'hash'} ||= $refname;
 913                }
 914        }
 915
 916        # next, handle the 'parent' part, if present
 917        if (defined $parentrefname) {
 918                # a missing pathspec defaults to the 'current' filename, allowing e.g.
 919                # someproject/blobdiff/oldrev..newrev:/filename
 920                if ($parentpathname) {
 921                        $parentpathname =~ s,^/+,,;
 922                        $parentpathname =~ s,/$,,;
 923                        $input_params{'file_parent'} ||= $parentpathname;
 924                } else {
 925                        $input_params{'file_parent'} ||= $input_params{'file_name'};
 926                }
 927                # we assume that hash_parent_base is wanted if a path was specified,
 928                # or if the action wants hash_base instead of hash
 929                if (defined $input_params{'file_parent'} ||
 930                        grep { $_ eq $input_params{'action'} } @wants_base) {
 931                        $input_params{'hash_parent_base'} ||= $parentrefname;
 932                } else {
 933                        $input_params{'hash_parent'} ||= $parentrefname;
 934                }
 935        }
 936
 937        # for the snapshot action, we allow URLs in the form
 938        # $project/snapshot/$hash.ext
 939        # where .ext determines the snapshot and gets removed from the
 940        # passed $refname to provide the $hash.
 941        #
 942        # To be able to tell that $refname includes the format extension, we
 943        # require the following two conditions to be satisfied:
 944        # - the hash input parameter MUST have been set from the $refname part
 945        #   of the URL (i.e. they must be equal)
 946        # - the snapshot format MUST NOT have been defined already (e.g. from
 947        #   CGI parameter sf)
 948        # It's also useless to try any matching unless $refname has a dot,
 949        # so we check for that too
 950        if (defined $input_params{'action'} &&
 951                $input_params{'action'} eq 'snapshot' &&
 952                defined $refname && index($refname, '.') != -1 &&
 953                $refname eq $input_params{'hash'} &&
 954                !defined $input_params{'snapshot_format'}) {
 955                # We loop over the known snapshot formats, checking for
 956                # extensions. Allowed extensions are both the defined suffix
 957                # (which includes the initial dot already) and the snapshot
 958                # format key itself, with a prepended dot
 959                while (my ($fmt, $opt) = each %known_snapshot_formats) {
 960                        my $hash = $refname;
 961                        unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 962                                next;
 963                        }
 964                        my $sfx = $1;
 965                        # a valid suffix was found, so set the snapshot format
 966                        # and reset the hash parameter
 967                        $input_params{'snapshot_format'} = $fmt;
 968                        $input_params{'hash'} = $hash;
 969                        # we also set the format suffix to the one requested
 970                        # in the URL: this way a request for e.g. .tgz returns
 971                        # a .tgz instead of a .tar.gz
 972                        $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 973                        last;
 974                }
 975        }
 976}
 977
 978our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 979     $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 980     $searchtext, $search_regexp, $project_filter);
 981sub evaluate_and_validate_params {
 982        our $action = $input_params{'action'};
 983        if (defined $action) {
 984                if (!validate_action($action)) {
 985                        die_error(400, "Invalid action parameter");
 986                }
 987        }
 988
 989        # parameters which are pathnames
 990        our $project = $input_params{'project'};
 991        if (defined $project) {
 992                if (!validate_project($project)) {
 993                        undef $project;
 994                        die_error(404, "No such project");
 995                }
 996        }
 997
 998        our $project_filter = $input_params{'project_filter'};
 999        if (defined $project_filter) {
1000                if (!validate_pathname($project_filter)) {
1001                        die_error(404, "Invalid project_filter parameter");
1002                }
1003        }
1004
1005        our $file_name = $input_params{'file_name'};
1006        if (defined $file_name) {
1007                if (!validate_pathname($file_name)) {
1008                        die_error(400, "Invalid file parameter");
1009                }
1010        }
1011
1012        our $file_parent = $input_params{'file_parent'};
1013        if (defined $file_parent) {
1014                if (!validate_pathname($file_parent)) {
1015                        die_error(400, "Invalid file parent parameter");
1016                }
1017        }
1018
1019        # parameters which are refnames
1020        our $hash = $input_params{'hash'};
1021        if (defined $hash) {
1022                if (!validate_refname($hash)) {
1023                        die_error(400, "Invalid hash parameter");
1024                }
1025        }
1026
1027        our $hash_parent = $input_params{'hash_parent'};
1028        if (defined $hash_parent) {
1029                if (!validate_refname($hash_parent)) {
1030                        die_error(400, "Invalid hash parent parameter");
1031                }
1032        }
1033
1034        our $hash_base = $input_params{'hash_base'};
1035        if (defined $hash_base) {
1036                if (!validate_refname($hash_base)) {
1037                        die_error(400, "Invalid hash base parameter");
1038                }
1039        }
1040
1041        our @extra_options = @{$input_params{'extra_options'}};
1042        # @extra_options is always defined, since it can only be (currently) set from
1043        # CGI, and $cgi->param() returns the empty array in array context if the param
1044        # is not set
1045        foreach my $opt (@extra_options) {
1046                if (not exists $allowed_options{$opt}) {
1047                        die_error(400, "Invalid option parameter");
1048                }
1049                if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1050                        die_error(400, "Invalid option parameter for this action");
1051                }
1052        }
1053
1054        our $hash_parent_base = $input_params{'hash_parent_base'};
1055        if (defined $hash_parent_base) {
1056                if (!validate_refname($hash_parent_base)) {
1057                        die_error(400, "Invalid hash parent base parameter");
1058                }
1059        }
1060
1061        # other parameters
1062        our $page = $input_params{'page'};
1063        if (defined $page) {
1064                if ($page =~ m/[^0-9]/) {
1065                        die_error(400, "Invalid page parameter");
1066                }
1067        }
1068
1069        our $searchtype = $input_params{'searchtype'};
1070        if (defined $searchtype) {
1071                if ($searchtype =~ m/[^a-z]/) {
1072                        die_error(400, "Invalid searchtype parameter");
1073                }
1074        }
1075
1076        our $search_use_regexp = $input_params{'search_use_regexp'};
1077
1078        our $searchtext = $input_params{'searchtext'};
1079        our $search_regexp;
1080        if (defined $searchtext) {
1081                if (length($searchtext) < 2) {
1082                        die_error(403, "At least two characters are required for search parameter");
1083                }
1084                if ($search_use_regexp) {
1085                        $search_regexp = $searchtext;
1086                        if (!eval { qr/$search_regexp/; 1; }) {
1087                                (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1088                                die_error(400, "Invalid search regexp '$search_regexp'",
1089                                          esc_html($error));
1090                        }
1091                } else {
1092                        $search_regexp = quotemeta $searchtext;
1093                }
1094        }
1095}
1096
1097# path to the current git repository
1098our $git_dir;
1099sub evaluate_git_dir {
1100        our $git_dir = "$projectroot/$project" if $project;
1101}
1102
1103our (@snapshot_fmts, $git_avatar);
1104sub configure_gitweb_features {
1105        # list of supported snapshot formats
1106        our @snapshot_fmts = gitweb_get_feature('snapshot');
1107        @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1108
1109        # check that the avatar feature is set to a known provider name,
1110        # and for each provider check if the dependencies are satisfied.
1111        # if the provider name is invalid or the dependencies are not met,
1112        # reset $git_avatar to the empty string.
1113        our ($git_avatar) = gitweb_get_feature('avatar');
1114        if ($git_avatar eq 'gravatar') {
1115                $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1116        } elsif ($git_avatar eq 'picon') {
1117                # no dependencies
1118        } else {
1119                $git_avatar = '';
1120        }
1121}
1122
1123# custom error handler: 'die <message>' is Internal Server Error
1124sub handle_errors_html {
1125        my $msg = shift; # it is already HTML escaped
1126
1127        # to avoid infinite loop where error occurs in die_error,
1128        # change handler to default handler, disabling handle_errors_html
1129        set_message("Error occured when inside die_error:\n$msg");
1130
1131        # you cannot jump out of die_error when called as error handler;
1132        # the subroutine set via CGI::Carp::set_message is called _after_
1133        # HTTP headers are already written, so it cannot write them itself
1134        die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1135}
1136set_message(\&handle_errors_html);
1137
1138# dispatch
1139sub dispatch {
1140        if (!defined $action) {
1141                if (defined $hash) {
1142                        $action = git_get_type($hash);
1143                        $action or die_error(404, "Object does not exist");
1144                } elsif (defined $hash_base && defined $file_name) {
1145                        $action = git_get_type("$hash_base:$file_name");
1146                        $action or die_error(404, "File or directory does not exist");
1147                } elsif (defined $project) {
1148                        $action = 'summary';
1149                } else {
1150                        $action = 'project_list';
1151                }
1152        }
1153        if (!defined($actions{$action})) {
1154                die_error(400, "Unknown action");
1155        }
1156        if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1157            !$project) {
1158                die_error(400, "Project needed");
1159        }
1160        $actions{$action}->();
1161}
1162
1163sub reset_timer {
1164        our $t0 = [ gettimeofday() ]
1165                if defined $t0;
1166        our $number_of_git_cmds = 0;
1167}
1168
1169our $first_request = 1;
1170sub run_request {
1171        reset_timer();
1172
1173        evaluate_uri();
1174        if ($first_request) {
1175                evaluate_gitweb_config();
1176                evaluate_git_version();
1177        }
1178        if ($per_request_config) {
1179                if (ref($per_request_config) eq 'CODE') {
1180                        $per_request_config->();
1181                } elsif (!$first_request) {
1182                        evaluate_gitweb_config();
1183                }
1184        }
1185        check_loadavg();
1186
1187        # $projectroot and $projects_list might be set in gitweb config file
1188        $projects_list ||= $projectroot;
1189
1190        evaluate_query_params();
1191        evaluate_path_info();
1192        evaluate_and_validate_params();
1193        evaluate_git_dir();
1194
1195        configure_gitweb_features();
1196
1197        dispatch();
1198}
1199
1200our $is_last_request = sub { 1 };
1201our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1202our $CGI = 'CGI';
1203our $cgi;
1204sub configure_as_fcgi {
1205        require CGI::Fast;
1206        our $CGI = 'CGI::Fast';
1207
1208        my $request_number = 0;
1209        # let each child service 100 requests
1210        our $is_last_request = sub { ++$request_number > 100 };
1211}
1212sub evaluate_argv {
1213        my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1214        configure_as_fcgi()
1215                if $script_name =~ /\.fcgi$/;
1216
1217        return unless (@ARGV);
1218
1219        require Getopt::Long;
1220        Getopt::Long::GetOptions(
1221                'fastcgi|fcgi|f' => \&configure_as_fcgi,
1222                'nproc|n=i' => sub {
1223                        my ($arg, $val) = @_;
1224                        return unless eval { require FCGI::ProcManager; 1; };
1225                        my $proc_manager = FCGI::ProcManager->new({
1226                                n_processes => $val,
1227                        });
1228                        our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1229                        our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1230                        our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1231                },
1232        );
1233}
1234
1235sub run {
1236        evaluate_argv();
1237
1238        $first_request = 1;
1239        $pre_listen_hook->()
1240                if $pre_listen_hook;
1241
1242 REQUEST:
1243        while ($cgi = $CGI->new()) {
1244                $pre_dispatch_hook->()
1245                        if $pre_dispatch_hook;
1246
1247                run_request();
1248
1249                $post_dispatch_hook->()
1250                        if $post_dispatch_hook;
1251                $first_request = 0;
1252
1253                last REQUEST if ($is_last_request->());
1254        }
1255
1256 DONE_GITWEB:
1257        1;
1258}
1259
1260run();
1261
1262if (defined caller) {
1263        # wrapped in a subroutine processing requests,
1264        # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1265        return;
1266} else {
1267        # pure CGI script, serving single request
1268        exit;
1269}
1270
1271## ======================================================================
1272## action links
1273
1274# possible values of extra options
1275# -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1276# -replay => 1      - start from a current view (replay with modifications)
1277# -path_info => 0|1 - don't use/use path_info URL (if possible)
1278# -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1279sub href {
1280        my %params = @_;
1281        # default is to use -absolute url() i.e. $my_uri
1282        my $href = $params{-full} ? $my_url : $my_uri;
1283
1284        # implicit -replay, must be first of implicit params
1285        $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1286
1287        $params{'project'} = $project unless exists $params{'project'};
1288
1289        if ($params{-replay}) {
1290                while (my ($name, $symbol) = each %cgi_param_mapping) {
1291                        if (!exists $params{$name}) {
1292                                $params{$name} = $input_params{$name};
1293                        }
1294                }
1295        }
1296
1297        my $use_pathinfo = gitweb_check_feature('pathinfo');
1298        if (defined $params{'project'} &&
1299            (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1300                # try to put as many parameters as possible in PATH_INFO:
1301                #   - project name
1302                #   - action
1303                #   - hash_parent or hash_parent_base:/file_parent
1304                #   - hash or hash_base:/filename
1305                #   - the snapshot_format as an appropriate suffix
1306
1307                # When the script is the root DirectoryIndex for the domain,
1308                # $href here would be something like http://gitweb.example.com/
1309                # Thus, we strip any trailing / from $href, to spare us double
1310                # slashes in the final URL
1311                $href =~ s,/$,,;
1312
1313                # Then add the project name, if present
1314                $href .= "/".esc_path_info($params{'project'});
1315                delete $params{'project'};
1316
1317                # since we destructively absorb parameters, we keep this
1318                # boolean that remembers if we're handling a snapshot
1319                my $is_snapshot = $params{'action'} eq 'snapshot';
1320
1321                # Summary just uses the project path URL, any other action is
1322                # added to the URL
1323                if (defined $params{'action'}) {
1324                        $href .= "/".esc_path_info($params{'action'})
1325                                unless $params{'action'} eq 'summary';
1326                        delete $params{'action'};
1327                }
1328
1329                # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1330                # stripping nonexistent or useless pieces
1331                $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1332                        || $params{'hash_parent'} || $params{'hash'});
1333                if (defined $params{'hash_base'}) {
1334                        if (defined $params{'hash_parent_base'}) {
1335                                $href .= esc_path_info($params{'hash_parent_base'});
1336                                # skip the file_parent if it's the same as the file_name
1337                                if (defined $params{'file_parent'}) {
1338                                        if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1339                                                delete $params{'file_parent'};
1340                                        } elsif ($params{'file_parent'} !~ /\.\./) {
1341                                                $href .= ":/".esc_path_info($params{'file_parent'});
1342                                                delete $params{'file_parent'};
1343                                        }
1344                                }
1345                                $href .= "..";
1346                                delete $params{'hash_parent'};
1347                                delete $params{'hash_parent_base'};
1348                        } elsif (defined $params{'hash_parent'}) {
1349                                $href .= esc_path_info($params{'hash_parent'}). "..";
1350                                delete $params{'hash_parent'};
1351                        }
1352
1353                        $href .= esc_path_info($params{'hash_base'});
1354                        if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1355                                $href .= ":/".esc_path_info($params{'file_name'});
1356                                delete $params{'file_name'};
1357                        }
1358                        delete $params{'hash'};
1359                        delete $params{'hash_base'};
1360                } elsif (defined $params{'hash'}) {
1361                        $href .= esc_path_info($params{'hash'});
1362                        delete $params{'hash'};
1363                }
1364
1365                # If the action was a snapshot, we can absorb the
1366                # snapshot_format parameter too
1367                if ($is_snapshot) {
1368                        my $fmt = $params{'snapshot_format'};
1369                        # snapshot_format should always be defined when href()
1370                        # is called, but just in case some code forgets, we
1371                        # fall back to the default
1372                        $fmt ||= $snapshot_fmts[0];
1373                        $href .= $known_snapshot_formats{$fmt}{'suffix'};
1374                        delete $params{'snapshot_format'};
1375                }
1376        }
1377
1378        # now encode the parameters explicitly
1379        my @result = ();
1380        for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1381                my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1382                if (defined $params{$name}) {
1383                        if (ref($params{$name}) eq "ARRAY") {
1384                                foreach my $par (@{$params{$name}}) {
1385                                        push @result, $symbol . "=" . esc_param($par);
1386                                }
1387                        } else {
1388                                push @result, $symbol . "=" . esc_param($params{$name});
1389                        }
1390                }
1391        }
1392        $href .= "?" . join(';', @result) if scalar @result;
1393
1394        # final transformation: trailing spaces must be escaped (URI-encoded)
1395        $href =~ s/(\s+)$/CGI::escape($1)/e;
1396
1397        if ($params{-anchor}) {
1398                $href .= "#".esc_param($params{-anchor});
1399        }
1400
1401        return $href;
1402}
1403
1404
1405## ======================================================================
1406## validation, quoting/unquoting and escaping
1407
1408sub validate_action {
1409        my $input = shift || return undef;
1410        return undef unless exists $actions{$input};
1411        return $input;
1412}
1413
1414sub validate_project {
1415        my $input = shift || return undef;
1416        if (!validate_pathname($input) ||
1417                !(-d "$projectroot/$input") ||
1418                !check_export_ok("$projectroot/$input") ||
1419                ($strict_export && !project_in_list($input))) {
1420                return undef;
1421        } else {
1422                return $input;
1423        }
1424}
1425
1426sub validate_pathname {
1427        my $input = shift || return undef;
1428
1429        # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1430        # at the beginning, at the end, and between slashes.
1431        # also this catches doubled slashes
1432        if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1433                return undef;
1434        }
1435        # no null characters
1436        if ($input =~ m!\0!) {
1437                return undef;
1438        }
1439        return $input;
1440}
1441
1442sub validate_refname {
1443        my $input = shift || return undef;
1444
1445        # textual hashes are O.K.
1446        if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1447                return $input;
1448        }
1449        # it must be correct pathname
1450        $input = validate_pathname($input)
1451                or return undef;
1452        # restrictions on ref name according to git-check-ref-format
1453        if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1454                return undef;
1455        }
1456        return $input;
1457}
1458
1459# decode sequences of octets in utf8 into Perl's internal form,
1460# which is utf-8 with utf8 flag set if needed.  gitweb writes out
1461# in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1462sub to_utf8 {
1463        my $str = shift;
1464        return undef unless defined $str;
1465
1466        if (utf8::is_utf8($str) || utf8::decode($str)) {
1467                return $str;
1468        } else {
1469                return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1470        }
1471}
1472
1473# quote unsafe chars, but keep the slash, even when it's not
1474# correct, but quoted slashes look too horrible in bookmarks
1475sub esc_param {
1476        my $str = shift;
1477        return undef unless defined $str;
1478        $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1479        $str =~ s/ /\+/g;
1480        return $str;
1481}
1482
1483# the quoting rules for path_info fragment are slightly different
1484sub esc_path_info {
1485        my $str = shift;
1486        return undef unless defined $str;
1487
1488        # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1489        $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1490
1491        return $str;
1492}
1493
1494# quote unsafe chars in whole URL, so some characters cannot be quoted
1495sub esc_url {
1496        my $str = shift;
1497        return undef unless defined $str;
1498        $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1499        $str =~ s/ /\+/g;
1500        return $str;
1501}
1502
1503# quote unsafe characters in HTML attributes
1504sub esc_attr {
1505
1506        # for XHTML conformance escaping '"' to '&quot;' is not enough
1507        return esc_html(@_);
1508}
1509
1510# replace invalid utf8 character with SUBSTITUTION sequence
1511sub esc_html {
1512        my $str = shift;
1513        my %opts = @_;
1514
1515        return undef unless defined $str;
1516
1517        $str = to_utf8($str);
1518        $str = $cgi->escapeHTML($str);
1519        if ($opts{'-nbsp'}) {
1520                $str =~ s/ /&nbsp;/g;
1521        }
1522        $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1523        return $str;
1524}
1525
1526# quote control characters and escape filename to HTML
1527sub esc_path {
1528        my $str = shift;
1529        my %opts = @_;
1530
1531        return undef unless defined $str;
1532
1533        $str = to_utf8($str);
1534        $str = $cgi->escapeHTML($str);
1535        if ($opts{'-nbsp'}) {
1536                $str =~ s/ /&nbsp;/g;
1537        }
1538        $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1539        return $str;
1540}
1541
1542# Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1543sub sanitize {
1544        my $str = shift;
1545
1546        return undef unless defined $str;
1547
1548        $str = to_utf8($str);
1549        $str =~ s|([[:cntrl:]])|($1 =~ /[\t\n\r]/ ? $1 : quot_cec($1))|eg;
1550        return $str;
1551}
1552
1553# Make control characters "printable", using character escape codes (CEC)
1554sub quot_cec {
1555        my $cntrl = shift;
1556        my %opts = @_;
1557        my %es = ( # character escape codes, aka escape sequences
1558                "\t" => '\t',   # tab            (HT)
1559                "\n" => '\n',   # line feed      (LF)
1560                "\r" => '\r',   # carrige return (CR)
1561                "\f" => '\f',   # form feed      (FF)
1562                "\b" => '\b',   # backspace      (BS)
1563                "\a" => '\a',   # alarm (bell)   (BEL)
1564                "\e" => '\e',   # escape         (ESC)
1565                "\013" => '\v', # vertical tab   (VT)
1566                "\000" => '\0', # nul character  (NUL)
1567        );
1568        my $chr = ( (exists $es{$cntrl})
1569                    ? $es{$cntrl}
1570                    : sprintf('\%2x', ord($cntrl)) );
1571        if ($opts{-nohtml}) {
1572                return $chr;
1573        } else {
1574                return "<span class=\"cntrl\">$chr</span>";
1575        }
1576}
1577
1578# Alternatively use unicode control pictures codepoints,
1579# Unicode "printable representation" (PR)
1580sub quot_upr {
1581        my $cntrl = shift;
1582        my %opts = @_;
1583
1584        my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1585        if ($opts{-nohtml}) {
1586                return $chr;
1587        } else {
1588                return "<span class=\"cntrl\">$chr</span>";
1589        }
1590}
1591
1592# git may return quoted and escaped filenames
1593sub unquote {
1594        my $str = shift;
1595
1596        sub unq {
1597                my $seq = shift;
1598                my %es = ( # character escape codes, aka escape sequences
1599                        't' => "\t",   # tab            (HT, TAB)
1600                        'n' => "\n",   # newline        (NL)
1601                        'r' => "\r",   # return         (CR)
1602                        'f' => "\f",   # form feed      (FF)
1603                        'b' => "\b",   # backspace      (BS)
1604                        'a' => "\a",   # alarm (bell)   (BEL)
1605                        'e' => "\e",   # escape         (ESC)
1606                        'v' => "\013", # vertical tab   (VT)
1607                );
1608
1609                if ($seq =~ m/^[0-7]{1,3}$/) {
1610                        # octal char sequence
1611                        return chr(oct($seq));
1612                } elsif (exists $es{$seq}) {
1613                        # C escape sequence, aka character escape code
1614                        return $es{$seq};
1615                }
1616                # quoted ordinary character
1617                return $seq;
1618        }
1619
1620        if ($str =~ m/^"(.*)"$/) {
1621                # needs unquoting
1622                $str = $1;
1623                $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1624        }
1625        return $str;
1626}
1627
1628# escape tabs (convert tabs to spaces)
1629sub untabify {
1630        my $line = shift;
1631
1632        while ((my $pos = index($line, "\t")) != -1) {
1633                if (my $count = (8 - ($pos % 8))) {
1634                        my $spaces = ' ' x $count;
1635                        $line =~ s/\t/$spaces/;
1636                }
1637        }
1638
1639        return $line;
1640}
1641
1642sub project_in_list {
1643        my $project = shift;
1644        my @list = git_get_projects_list();
1645        return @list && scalar(grep { $_->{'path'} eq $project } @list);
1646}
1647
1648## ----------------------------------------------------------------------
1649## HTML aware string manipulation
1650
1651# Try to chop given string on a word boundary between position
1652# $len and $len+$add_len. If there is no word boundary there,
1653# chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1654# (marking chopped part) would be longer than given string.
1655sub chop_str {
1656        my $str = shift;
1657        my $len = shift;
1658        my $add_len = shift || 10;
1659        my $where = shift || 'right'; # 'left' | 'center' | 'right'
1660
1661        # Make sure perl knows it is utf8 encoded so we don't
1662        # cut in the middle of a utf8 multibyte char.
1663        $str = to_utf8($str);
1664
1665        # allow only $len chars, but don't cut a word if it would fit in $add_len
1666        # if it doesn't fit, cut it if it's still longer than the dots we would add
1667        # remove chopped character entities entirely
1668
1669        # when chopping in the middle, distribute $len into left and right part
1670        # return early if chopping wouldn't make string shorter
1671        if ($where eq 'center') {
1672                return $str if ($len + 5 >= length($str)); # filler is length 5
1673                $len = int($len/2);
1674        } else {
1675                return $str if ($len + 4 >= length($str)); # filler is length 4
1676        }
1677
1678        # regexps: ending and beginning with word part up to $add_len
1679        my $endre = qr/.{$len}\w{0,$add_len}/;
1680        my $begre = qr/\w{0,$add_len}.{$len}/;
1681
1682        if ($where eq 'left') {
1683                $str =~ m/^(.*?)($begre)$/;
1684                my ($lead, $body) = ($1, $2);
1685                if (length($lead) > 4) {
1686                        $lead = " ...";
1687                }
1688                return "$lead$body";
1689
1690        } elsif ($where eq 'center') {
1691                $str =~ m/^($endre)(.*)$/;
1692                my ($left, $str)  = ($1, $2);
1693                $str =~ m/^(.*?)($begre)$/;
1694                my ($mid, $right) = ($1, $2);
1695                if (length($mid) > 5) {
1696                        $mid = " ... ";
1697                }
1698                return "$left$mid$right";
1699
1700        } else {
1701                $str =~ m/^($endre)(.*)$/;
1702                my $body = $1;
1703                my $tail = $2;
1704                if (length($tail) > 4) {
1705                        $tail = "... ";
1706                }
1707                return "$body$tail";
1708        }
1709}
1710
1711# takes the same arguments as chop_str, but also wraps a <span> around the
1712# result with a title attribute if it does get chopped. Additionally, the
1713# string is HTML-escaped.
1714sub chop_and_escape_str {
1715        my ($str) = @_;
1716
1717        my $chopped = chop_str(@_);
1718        $str = to_utf8($str);
1719        if ($chopped eq $str) {
1720                return esc_html($chopped);
1721        } else {
1722                $str =~ s/[[:cntrl:]]/?/g;
1723                return $cgi->span({-title=>$str}, esc_html($chopped));
1724        }
1725}
1726
1727# Highlight selected fragments of string, using given CSS class,
1728# and escape HTML.  It is assumed that fragments do not overlap.
1729# Regions are passed as list of pairs (array references).
1730#
1731# Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1732# '<span class="mark">foo</span>bar'
1733sub esc_html_hl_regions {
1734        my ($str, $css_class, @sel) = @_;
1735        my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1736        @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1737        return esc_html($str, %opts) unless @sel;
1738
1739        my $out = '';
1740        my $pos = 0;
1741
1742        for my $s (@sel) {
1743                my ($begin, $end) = @$s;
1744
1745                # Don't create empty <span> elements.
1746                next if $end <= $begin;
1747
1748                my $escaped = esc_html(substr($str, $begin, $end - $begin),
1749                                       %opts);
1750
1751                $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1752                        if ($begin - $pos > 0);
1753                $out .= $cgi->span({-class => $css_class}, $escaped);
1754
1755                $pos = $end;
1756        }
1757        $out .= esc_html(substr($str, $pos), %opts)
1758                if ($pos < length($str));
1759
1760        return $out;
1761}
1762
1763# return positions of beginning and end of each match
1764sub matchpos_list {
1765        my ($str, $regexp) = @_;
1766        return unless (defined $str && defined $regexp);
1767
1768        my @matches;
1769        while ($str =~ /$regexp/g) {
1770                push @matches, [$-[0], $+[0]];
1771        }
1772        return @matches;
1773}
1774
1775# highlight match (if any), and escape HTML
1776sub esc_html_match_hl {
1777        my ($str, $regexp) = @_;
1778        return esc_html($str) unless defined $regexp;
1779
1780        my @matches = matchpos_list($str, $regexp);
1781        return esc_html($str) unless @matches;
1782
1783        return esc_html_hl_regions($str, 'match', @matches);
1784}
1785
1786
1787# highlight match (if any) of shortened string, and escape HTML
1788sub esc_html_match_hl_chopped {
1789        my ($str, $chopped, $regexp) = @_;
1790        return esc_html_match_hl($str, $regexp) unless defined $chopped;
1791
1792        my @matches = matchpos_list($str, $regexp);
1793        return esc_html($chopped) unless @matches;
1794
1795        # filter matches so that we mark chopped string
1796        my $tail = "... "; # see chop_str
1797        unless ($chopped =~ s/\Q$tail\E$//) {
1798                $tail = '';
1799        }
1800        my $chop_len = length($chopped);
1801        my $tail_len = length($tail);
1802        my @filtered;
1803
1804        for my $m (@matches) {
1805                if ($m->[0] > $chop_len) {
1806                        push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1807                        last;
1808                } elsif ($m->[1] > $chop_len) {
1809                        push @filtered, [ $m->[0], $chop_len + $tail_len ];
1810                        last;
1811                }
1812                push @filtered, $m;
1813        }
1814
1815        return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1816}
1817
1818## ----------------------------------------------------------------------
1819## functions returning short strings
1820
1821# CSS class for given age value (in seconds)
1822sub age_class {
1823        my $age = shift;
1824
1825        if (!defined $age) {
1826                return "noage";
1827        } elsif ($age < 60*60*2) {
1828                return "age0";
1829        } elsif ($age < 60*60*24*2) {
1830                return "age1";
1831        } else {
1832                return "age2";
1833        }
1834}
1835
1836# convert age in seconds to "nn units ago" string
1837sub age_string {
1838        my $age = shift;
1839        my $age_str;
1840
1841        if ($age > 60*60*24*365*2) {
1842                $age_str = (int $age/60/60/24/365);
1843                $age_str .= " years ago";
1844        } elsif ($age > 60*60*24*(365/12)*2) {
1845                $age_str = int $age/60/60/24/(365/12);
1846                $age_str .= " months ago";
1847        } elsif ($age > 60*60*24*7*2) {
1848                $age_str = int $age/60/60/24/7;
1849                $age_str .= " weeks ago";
1850        } elsif ($age > 60*60*24*2) {
1851                $age_str = int $age/60/60/24;
1852                $age_str .= " days ago";
1853        } elsif ($age > 60*60*2) {
1854                $age_str = int $age/60/60;
1855                $age_str .= " hours ago";
1856        } elsif ($age > 60*2) {
1857                $age_str = int $age/60;
1858                $age_str .= " min ago";
1859        } elsif ($age > 2) {
1860                $age_str = int $age;
1861                $age_str .= " sec ago";
1862        } else {
1863                $age_str .= " right now";
1864        }
1865        return $age_str;
1866}
1867
1868use constant {
1869        S_IFINVALID => 0030000,
1870        S_IFGITLINK => 0160000,
1871};
1872
1873# submodule/subproject, a commit object reference
1874sub S_ISGITLINK {
1875        my $mode = shift;
1876
1877        return (($mode & S_IFMT) == S_IFGITLINK)
1878}
1879
1880# convert file mode in octal to symbolic file mode string
1881sub mode_str {
1882        my $mode = oct shift;
1883
1884        if (S_ISGITLINK($mode)) {
1885                return 'm---------';
1886        } elsif (S_ISDIR($mode & S_IFMT)) {
1887                return 'drwxr-xr-x';
1888        } elsif (S_ISLNK($mode)) {
1889                return 'lrwxrwxrwx';
1890        } elsif (S_ISREG($mode)) {
1891                # git cares only about the executable bit
1892                if ($mode & S_IXUSR) {
1893                        return '-rwxr-xr-x';
1894                } else {
1895                        return '-rw-r--r--';
1896                };
1897        } else {
1898                return '----------';
1899        }
1900}
1901
1902# convert file mode in octal to file type string
1903sub file_type {
1904        my $mode = shift;
1905
1906        if ($mode !~ m/^[0-7]+$/) {
1907                return $mode;
1908        } else {
1909                $mode = oct $mode;
1910        }
1911
1912        if (S_ISGITLINK($mode)) {
1913                return "submodule";
1914        } elsif (S_ISDIR($mode & S_IFMT)) {
1915                return "directory";
1916        } elsif (S_ISLNK($mode)) {
1917                return "symlink";
1918        } elsif (S_ISREG($mode)) {
1919                return "file";
1920        } else {
1921                return "unknown";
1922        }
1923}
1924
1925# convert file mode in octal to file type description string
1926sub file_type_long {
1927        my $mode = shift;
1928
1929        if ($mode !~ m/^[0-7]+$/) {
1930                return $mode;
1931        } else {
1932                $mode = oct $mode;
1933        }
1934
1935        if (S_ISGITLINK($mode)) {
1936                return "submodule";
1937        } elsif (S_ISDIR($mode & S_IFMT)) {
1938                return "directory";
1939        } elsif (S_ISLNK($mode)) {
1940                return "symlink";
1941        } elsif (S_ISREG($mode)) {
1942                if ($mode & S_IXUSR) {
1943                        return "executable";
1944                } else {
1945                        return "file";
1946                };
1947        } else {
1948                return "unknown";
1949        }
1950}
1951
1952
1953## ----------------------------------------------------------------------
1954## functions returning short HTML fragments, or transforming HTML fragments
1955## which don't belong to other sections
1956
1957# format line of commit message.
1958sub format_log_line_html {
1959        my $line = shift;
1960
1961        $line = esc_html($line, -nbsp=>1);
1962        $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1963                $cgi->a({-href => href(action=>"object", hash=>$1),
1964                                        -class => "text"}, $1);
1965        }eg;
1966
1967        return $line;
1968}
1969
1970# format marker of refs pointing to given object
1971
1972# the destination action is chosen based on object type and current context:
1973# - for annotated tags, we choose the tag view unless it's the current view
1974#   already, in which case we go to shortlog view
1975# - for other refs, we keep the current view if we're in history, shortlog or
1976#   log view, and select shortlog otherwise
1977sub format_ref_marker {
1978        my ($refs, $id) = @_;
1979        my $markers = '';
1980
1981        if (defined $refs->{$id}) {
1982                foreach my $ref (@{$refs->{$id}}) {
1983                        # this code exploits the fact that non-lightweight tags are the
1984                        # only indirect objects, and that they are the only objects for which
1985                        # we want to use tag instead of shortlog as action
1986                        my ($type, $name) = qw();
1987                        my $indirect = ($ref =~ s/\^\{\}$//);
1988                        # e.g. tags/v2.6.11 or heads/next
1989                        if ($ref =~ m!^(.*?)s?/(.*)$!) {
1990                                $type = $1;
1991                                $name = $2;
1992                        } else {
1993                                $type = "ref";
1994                                $name = $ref;
1995                        }
1996
1997                        my $class = $type;
1998                        $class .= " indirect" if $indirect;
1999
2000                        my $dest_action = "shortlog";
2001
2002                        if ($indirect) {
2003                                $dest_action = "tag" unless $action eq "tag";
2004                        } elsif ($action =~ /^(history|(short)?log)$/) {
2005                                $dest_action = $action;
2006                        }
2007
2008                        my $dest = "";
2009                        $dest .= "refs/" unless $ref =~ m!^refs/!;
2010                        $dest .= $ref;
2011
2012                        my $link = $cgi->a({
2013                                -href => href(
2014                                        action=>$dest_action,
2015                                        hash=>$dest
2016                                )}, $name);
2017
2018                        $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2019                                $link . "</span>";
2020                }
2021        }
2022
2023        if ($markers) {
2024                return ' <span class="refs">'. $markers . '</span>';
2025        } else {
2026                return "";
2027        }
2028}
2029
2030# format, perhaps shortened and with markers, title line
2031sub format_subject_html {
2032        my ($long, $short, $href, $extra) = @_;
2033        $extra = '' unless defined($extra);
2034
2035        if (length($short) < length($long)) {
2036                $long =~ s/[[:cntrl:]]/?/g;
2037                return $cgi->a({-href => $href, -class => "list subject",
2038                                -title => to_utf8($long)},
2039                       esc_html($short)) . $extra;
2040        } else {
2041                return $cgi->a({-href => $href, -class => "list subject"},
2042                       esc_html($long)) . $extra;
2043        }
2044}
2045
2046# Rather than recomputing the url for an email multiple times, we cache it
2047# after the first hit. This gives a visible benefit in views where the avatar
2048# for the same email is used repeatedly (e.g. shortlog).
2049# The cache is shared by all avatar engines (currently gravatar only), which
2050# are free to use it as preferred. Since only one avatar engine is used for any
2051# given page, there's no risk for cache conflicts.
2052our %avatar_cache = ();
2053
2054# Compute the picon url for a given email, by using the picon search service over at
2055# http://www.cs.indiana.edu/picons/search.html
2056sub picon_url {
2057        my $email = lc shift;
2058        if (!$avatar_cache{$email}) {
2059                my ($user, $domain) = split('@', $email);
2060                $avatar_cache{$email} =
2061                        "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2062                        "$domain/$user/" .
2063                        "users+domains+unknown/up/single";
2064        }
2065        return $avatar_cache{$email};
2066}
2067
2068# Compute the gravatar url for a given email, if it's not in the cache already.
2069# Gravatar stores only the part of the URL before the size, since that's the
2070# one computationally more expensive. This also allows reuse of the cache for
2071# different sizes (for this particular engine).
2072sub gravatar_url {
2073        my $email = lc shift;
2074        my $size = shift;
2075        $avatar_cache{$email} ||=
2076                "http://www.gravatar.com/avatar/" .
2077                        Digest::MD5::md5_hex($email) . "?s=";
2078        return $avatar_cache{$email} . $size;
2079}
2080
2081# Insert an avatar for the given $email at the given $size if the feature
2082# is enabled.
2083sub git_get_avatar {
2084        my ($email, %opts) = @_;
2085        my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2086        my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2087        $opts{-size} ||= 'default';
2088        my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2089        my $url = "";
2090        if ($git_avatar eq 'gravatar') {
2091                $url = gravatar_url($email, $size);
2092        } elsif ($git_avatar eq 'picon') {
2093                $url = picon_url($email);
2094        }
2095        # Other providers can be added by extending the if chain, defining $url
2096        # as needed. If no variant puts something in $url, we assume avatars
2097        # are completely disabled/unavailable.
2098        if ($url) {
2099                return $pre_white .
2100                       "<img width=\"$size\" " .
2101                            "class=\"avatar\" " .
2102                            "src=\"".esc_url($url)."\" " .
2103                            "alt=\"\" " .
2104                       "/>" . $post_white;
2105        } else {
2106                return "";
2107        }
2108}
2109
2110sub format_search_author {
2111        my ($author, $searchtype, $displaytext) = @_;
2112        my $have_search = gitweb_check_feature('search');
2113
2114        if ($have_search) {
2115                my $performed = "";
2116                if ($searchtype eq 'author') {
2117                        $performed = "authored";
2118                } elsif ($searchtype eq 'committer') {
2119                        $performed = "committed";
2120                }
2121
2122                return $cgi->a({-href => href(action=>"search", hash=>$hash,
2123                                searchtext=>$author,
2124                                searchtype=>$searchtype), class=>"list",
2125                                title=>"Search for commits $performed by $author"},
2126                                $displaytext);
2127
2128        } else {
2129                return $displaytext;
2130        }
2131}
2132
2133# format the author name of the given commit with the given tag
2134# the author name is chopped and escaped according to the other
2135# optional parameters (see chop_str).
2136sub format_author_html {
2137        my $tag = shift;
2138        my $co = shift;
2139        my $author = chop_and_escape_str($co->{'author_name'}, @_);
2140        return "<$tag class=\"author\">" .
2141               format_search_author($co->{'author_name'}, "author",
2142                       git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2143                       $author) .
2144               "</$tag>";
2145}
2146
2147# format git diff header line, i.e. "diff --(git|combined|cc) ..."
2148sub format_git_diff_header_line {
2149        my $line = shift;
2150        my $diffinfo = shift;
2151        my ($from, $to) = @_;
2152
2153        if ($diffinfo->{'nparents'}) {
2154                # combined diff
2155                $line =~ s!^(diff (.*?) )"?.*$!$1!;
2156                if ($to->{'href'}) {
2157                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2158                                         esc_path($to->{'file'}));
2159                } else { # file was deleted (no href)
2160                        $line .= esc_path($to->{'file'});
2161                }
2162        } else {
2163                # "ordinary" diff
2164                $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2165                if ($from->{'href'}) {
2166                        $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2167                                         'a/' . esc_path($from->{'file'}));
2168                } else { # file was added (no href)
2169                        $line .= 'a/' . esc_path($from->{'file'});
2170                }
2171                $line .= ' ';
2172                if ($to->{'href'}) {
2173                        $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2174                                         'b/' . esc_path($to->{'file'}));
2175                } else { # file was deleted
2176                        $line .= 'b/' . esc_path($to->{'file'});
2177                }
2178        }
2179
2180        return "<div class=\"diff header\">$line</div>\n";
2181}
2182
2183# format extended diff header line, before patch itself
2184sub format_extended_diff_header_line {
2185        my $line = shift;
2186        my $diffinfo = shift;
2187        my ($from, $to) = @_;
2188
2189        # match <path>
2190        if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2191                $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2192                                       esc_path($from->{'file'}));
2193        }
2194        if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2195                $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2196                                 esc_path($to->{'file'}));
2197        }
2198        # match single <mode>
2199        if ($line =~ m/\s(\d{6})$/) {
2200                $line .= '<span class="info"> (' .
2201                         file_type_long($1) .
2202                         ')</span>';
2203        }
2204        # match <hash>
2205        if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2206                # can match only for combined diff
2207                $line = 'index ';
2208                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2209                        if ($from->{'href'}[$i]) {
2210                                $line .= $cgi->a({-href=>$from->{'href'}[$i],
2211                                                  -class=>"hash"},
2212                                                 substr($diffinfo->{'from_id'}[$i],0,7));
2213                        } else {
2214                                $line .= '0' x 7;
2215                        }
2216                        # separator
2217                        $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2218                }
2219                $line .= '..';
2220                if ($to->{'href'}) {
2221                        $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2222                                         substr($diffinfo->{'to_id'},0,7));
2223                } else {
2224                        $line .= '0' x 7;
2225                }
2226
2227        } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2228                # can match only for ordinary diff
2229                my ($from_link, $to_link);
2230                if ($from->{'href'}) {
2231                        $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2232                                             substr($diffinfo->{'from_id'},0,7));
2233                } else {
2234                        $from_link = '0' x 7;
2235                }
2236                if ($to->{'href'}) {
2237                        $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2238                                           substr($diffinfo->{'to_id'},0,7));
2239                } else {
2240                        $to_link = '0' x 7;
2241                }
2242                my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2243                $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2244        }
2245
2246        return $line . "<br/>\n";
2247}
2248
2249# format from-file/to-file diff header
2250sub format_diff_from_to_header {
2251        my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2252        my $line;
2253        my $result = '';
2254
2255        $line = $from_line;
2256        #assert($line =~ m/^---/) if DEBUG;
2257        # no extra formatting for "^--- /dev/null"
2258        if (! $diffinfo->{'nparents'}) {
2259                # ordinary (single parent) diff
2260                if ($line =~ m!^--- "?a/!) {
2261                        if ($from->{'href'}) {
2262                                $line = '--- a/' .
2263                                        $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2264                                                esc_path($from->{'file'}));
2265                        } else {
2266                                $line = '--- a/' .
2267                                        esc_path($from->{'file'});
2268                        }
2269                }
2270                $result .= qq!<div class="diff from_file">$line</div>\n!;
2271
2272        } else {
2273                # combined diff (merge commit)
2274                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2275                        if ($from->{'href'}[$i]) {
2276                                $line = '--- ' .
2277                                        $cgi->a({-href=>href(action=>"blobdiff",
2278                                                             hash_parent=>$diffinfo->{'from_id'}[$i],
2279                                                             hash_parent_base=>$parents[$i],
2280                                                             file_parent=>$from->{'file'}[$i],
2281                                                             hash=>$diffinfo->{'to_id'},
2282                                                             hash_base=>$hash,
2283                                                             file_name=>$to->{'file'}),
2284                                                 -class=>"path",
2285                                                 -title=>"diff" . ($i+1)},
2286                                                $i+1) .
2287                                        '/' .
2288                                        $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2289                                                esc_path($from->{'file'}[$i]));
2290                        } else {
2291                                $line = '--- /dev/null';
2292                        }
2293                        $result .= qq!<div class="diff from_file">$line</div>\n!;
2294                }
2295        }
2296
2297        $line = $to_line;
2298        #assert($line =~ m/^\+\+\+/) if DEBUG;
2299        # no extra formatting for "^+++ /dev/null"
2300        if ($line =~ m!^\+\+\+ "?b/!) {
2301                if ($to->{'href'}) {
2302                        $line = '+++ b/' .
2303                                $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2304                                        esc_path($to->{'file'}));
2305                } else {
2306                        $line = '+++ b/' .
2307                                esc_path($to->{'file'});
2308                }
2309        }
2310        $result .= qq!<div class="diff to_file">$line</div>\n!;
2311
2312        return $result;
2313}
2314
2315# create note for patch simplified by combined diff
2316sub format_diff_cc_simplified {
2317        my ($diffinfo, @parents) = @_;
2318        my $result = '';
2319
2320        $result .= "<div class=\"diff header\">" .
2321                   "diff --cc ";
2322        if (!is_deleted($diffinfo)) {
2323                $result .= $cgi->a({-href => href(action=>"blob",
2324                                                  hash_base=>$hash,
2325                                                  hash=>$diffinfo->{'to_id'},
2326                                                  file_name=>$diffinfo->{'to_file'}),
2327                                    -class => "path"},
2328                                   esc_path($diffinfo->{'to_file'}));
2329        } else {
2330                $result .= esc_path($diffinfo->{'to_file'});
2331        }
2332        $result .= "</div>\n" . # class="diff header"
2333                   "<div class=\"diff nodifferences\">" .
2334                   "Simple merge" .
2335                   "</div>\n"; # class="diff nodifferences"
2336
2337        return $result;
2338}
2339
2340sub diff_line_class {
2341        my ($line, $from, $to) = @_;
2342
2343        # ordinary diff
2344        my $num_sign = 1;
2345        # combined diff
2346        if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2347                $num_sign = scalar @{$from->{'href'}};
2348        }
2349
2350        my @diff_line_classifier = (
2351                { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2352                { regexp => qr/^\\/,               class => "incomplete"  },
2353                { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2354                # classifier for context must come before classifier add/rem,
2355                # or we would have to use more complicated regexp, for example
2356                # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2357                { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2358                { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2359        );
2360        for my $clsfy (@diff_line_classifier) {
2361                return $clsfy->{'class'}
2362                        if ($line =~ $clsfy->{'regexp'});
2363        }
2364
2365        # fallback
2366        return "";
2367}
2368
2369# assumes that $from and $to are defined and correctly filled,
2370# and that $line holds a line of chunk header for unified diff
2371sub format_unidiff_chunk_header {
2372        my ($line, $from, $to) = @_;
2373
2374        my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2375                $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2376
2377        $from_lines = 0 unless defined $from_lines;
2378        $to_lines   = 0 unless defined $to_lines;
2379
2380        if ($from->{'href'}) {
2381                $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2382                                     -class=>"list"}, $from_text);
2383        }
2384        if ($to->{'href'}) {
2385                $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2386                                     -class=>"list"}, $to_text);
2387        }
2388        $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2389                "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2390        return $line;
2391}
2392
2393# assumes that $from and $to are defined and correctly filled,
2394# and that $line holds a line of chunk header for combined diff
2395sub format_cc_diff_chunk_header {
2396        my ($line, $from, $to) = @_;
2397
2398        my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2399        my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2400
2401        @from_text = split(' ', $ranges);
2402        for (my $i = 0; $i < @from_text; ++$i) {
2403                ($from_start[$i], $from_nlines[$i]) =
2404                        (split(',', substr($from_text[$i], 1)), 0);
2405        }
2406
2407        $to_text   = pop @from_text;
2408        $to_start  = pop @from_start;
2409        $to_nlines = pop @from_nlines;
2410
2411        $line = "<span class=\"chunk_info\">$prefix ";
2412        for (my $i = 0; $i < @from_text; ++$i) {
2413                if ($from->{'href'}[$i]) {
2414                        $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2415                                          -class=>"list"}, $from_text[$i]);
2416                } else {
2417                        $line .= $from_text[$i];
2418                }
2419                $line .= " ";
2420        }
2421        if ($to->{'href'}) {
2422                $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2423                                  -class=>"list"}, $to_text);
2424        } else {
2425                $line .= $to_text;
2426        }
2427        $line .= " $prefix</span>" .
2428                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2429        return $line;
2430}
2431
2432# process patch (diff) line (not to be used for diff headers),
2433# returning HTML-formatted (but not wrapped) line
2434sub format_diff_line {
2435        my ($line, $diff_class, $from, $to) = @_;
2436
2437        chomp $line;
2438        $line = untabify($line);
2439
2440        if ($from && $to && $line =~ m/^\@{2} /) {
2441                $line = format_unidiff_chunk_header($line, $from, $to);
2442        } elsif ($from && $to && $line =~ m/^\@{3}/) {
2443                $line = format_cc_diff_chunk_header($line, $from, $to);
2444        } else {
2445                $line = esc_html($line, -nbsp=>1);
2446        }
2447
2448        my $diff_classes = "diff";
2449        $diff_classes .= " $diff_class" if ($diff_class);
2450        $line = "<div class=\"$diff_classes\">$line</div>\n";
2451
2452        return $line;
2453}
2454
2455# Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2456# linked.  Pass the hash of the tree/commit to snapshot.
2457sub format_snapshot_links {
2458        my ($hash) = @_;
2459        my $num_fmts = @snapshot_fmts;
2460        if ($num_fmts > 1) {
2461                # A parenthesized list of links bearing format names.
2462                # e.g. "snapshot (_tar.gz_ _zip_)"
2463                return "snapshot (" . join(' ', map
2464                        $cgi->a({
2465                                -href => href(
2466                                        action=>"snapshot",
2467                                        hash=>$hash,
2468                                        snapshot_format=>$_
2469                                )
2470                        }, $known_snapshot_formats{$_}{'display'})
2471                , @snapshot_fmts) . ")";
2472        } elsif ($num_fmts == 1) {
2473                # A single "snapshot" link whose tooltip bears the format name.
2474                # i.e. "_snapshot_"
2475                my ($fmt) = @snapshot_fmts;
2476                return
2477                        $cgi->a({
2478                                -href => href(
2479                                        action=>"snapshot",
2480                                        hash=>$hash,
2481                                        snapshot_format=>$fmt
2482                                ),
2483                                -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2484                        }, "snapshot");
2485        } else { # $num_fmts == 0
2486                return undef;
2487        }
2488}
2489
2490## ......................................................................
2491## functions returning values to be passed, perhaps after some
2492## transformation, to other functions; e.g. returning arguments to href()
2493
2494# returns hash to be passed to href to generate gitweb URL
2495# in -title key it returns description of link
2496sub get_feed_info {
2497        my $format = shift || 'Atom';
2498        my %res = (action => lc($format));
2499
2500        # feed links are possible only for project views
2501        return unless (defined $project);
2502        # some views should link to OPML, or to generic project feed,
2503        # or don't have specific feed yet (so they should use generic)
2504        return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2505
2506        my $branch;
2507        # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2508        # from tag links; this also makes possible to detect branch links
2509        if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2510            (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2511                $branch = $1;
2512        }
2513        # find log type for feed description (title)
2514        my $type = 'log';
2515        if (defined $file_name) {
2516                $type  = "history of $file_name";
2517                $type .= "/" if ($action eq 'tree');
2518                $type .= " on '$branch'" if (defined $branch);
2519        } else {
2520                $type = "log of $branch" if (defined $branch);
2521        }
2522
2523        $res{-title} = $type;
2524        $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2525        $res{'file_name'} = $file_name;
2526
2527        return %res;
2528}
2529
2530## ----------------------------------------------------------------------
2531## git utility subroutines, invoking git commands
2532
2533# returns path to the core git executable and the --git-dir parameter as list
2534sub git_cmd {
2535        $number_of_git_cmds++;
2536        return $GIT, '--git-dir='.$git_dir;
2537}
2538
2539# quote the given arguments for passing them to the shell
2540# quote_command("command", "arg 1", "arg with ' and ! characters")
2541# => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2542# Try to avoid using this function wherever possible.
2543sub quote_command {
2544        return join(' ',
2545                map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2546}
2547
2548# get HEAD ref of given project as hash
2549sub git_get_head_hash {
2550        return git_get_full_hash(shift, 'HEAD');
2551}
2552
2553sub git_get_full_hash {
2554        return git_get_hash(@_);
2555}
2556
2557sub git_get_short_hash {
2558        return git_get_hash(@_, '--short=7');
2559}
2560
2561sub git_get_hash {
2562        my ($project, $hash, @options) = @_;
2563        my $o_git_dir = $git_dir;
2564        my $retval = undef;
2565        $git_dir = "$projectroot/$project";
2566        if (open my $fd, '-|', git_cmd(), 'rev-parse',
2567            '--verify', '-q', @options, $hash) {
2568                $retval = <$fd>;
2569                chomp $retval if defined $retval;
2570                close $fd;
2571        }
2572        if (defined $o_git_dir) {
2573                $git_dir = $o_git_dir;
2574        }
2575        return $retval;
2576}
2577
2578# get type of given object
2579sub git_get_type {
2580        my $hash = shift;
2581
2582        open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2583        my $type = <$fd>;
2584        close $fd or return;
2585        chomp $type;
2586        return $type;
2587}
2588
2589# repository configuration
2590our $config_file = '';
2591our %config;
2592
2593# store multiple values for single key as anonymous array reference
2594# single values stored directly in the hash, not as [ <value> ]
2595sub hash_set_multi {
2596        my ($hash, $key, $value) = @_;
2597
2598        if (!exists $hash->{$key}) {
2599                $hash->{$key} = $value;
2600        } elsif (!ref $hash->{$key}) {
2601                $hash->{$key} = [ $hash->{$key}, $value ];
2602        } else {
2603                push @{$hash->{$key}}, $value;
2604        }
2605}
2606
2607# return hash of git project configuration
2608# optionally limited to some section, e.g. 'gitweb'
2609sub git_parse_project_config {
2610        my $section_regexp = shift;
2611        my %config;
2612
2613        local $/ = "\0";
2614
2615        open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2616                or return;
2617
2618        while (my $keyval = <$fh>) {
2619                chomp $keyval;
2620                my ($key, $value) = split(/\n/, $keyval, 2);
2621
2622                hash_set_multi(\%config, $key, $value)
2623                        if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2624        }
2625        close $fh;
2626
2627        return %config;
2628}
2629
2630# convert config value to boolean: 'true' or 'false'
2631# no value, number > 0, 'true' and 'yes' values are true
2632# rest of values are treated as false (never as error)
2633sub config_to_bool {
2634        my $val = shift;
2635
2636        return 1 if !defined $val;             # section.key
2637
2638        # strip leading and trailing whitespace
2639        $val =~ s/^\s+//;
2640        $val =~ s/\s+$//;
2641
2642        return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2643                ($val =~ /^(?:true|yes)$/i));  # section.key = true
2644}
2645
2646# convert config value to simple decimal number
2647# an optional value suffix of 'k', 'm', or 'g' will cause the value
2648# to be multiplied by 1024, 1048576, or 1073741824
2649sub config_to_int {
2650        my $val = shift;
2651
2652        # strip leading and trailing whitespace
2653        $val =~ s/^\s+//;
2654        $val =~ s/\s+$//;
2655
2656        if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2657                $unit = lc($unit);
2658                # unknown unit is treated as 1
2659                return $num * ($unit eq 'g' ? 1073741824 :
2660                               $unit eq 'm' ?    1048576 :
2661                               $unit eq 'k' ?       1024 : 1);
2662        }
2663        return $val;
2664}
2665
2666# convert config value to array reference, if needed
2667sub config_to_multi {
2668        my $val = shift;
2669
2670        return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2671}
2672
2673sub git_get_project_config {
2674        my ($key, $type) = @_;
2675
2676        return unless defined $git_dir;
2677
2678        # key sanity check
2679        return unless ($key);
2680        # only subsection, if exists, is case sensitive,
2681        # and not lowercased by 'git config -z -l'
2682        if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2683                $key = join(".", lc($hi), $mi, lc($lo));
2684        } else {
2685                $key = lc($key);
2686        }
2687        $key =~ s/^gitweb\.//;
2688        return if ($key =~ m/\W/);
2689
2690        # type sanity check
2691        if (defined $type) {
2692                $type =~ s/^--//;
2693                $type = undef
2694                        unless ($type eq 'bool' || $type eq 'int');
2695        }
2696
2697        # get config
2698        if (!defined $config_file ||
2699            $config_file ne "$git_dir/config") {
2700                %config = git_parse_project_config('gitweb');
2701                $config_file = "$git_dir/config";
2702        }
2703
2704        # check if config variable (key) exists
2705        return unless exists $config{"gitweb.$key"};
2706
2707        # ensure given type
2708        if (!defined $type) {
2709                return $config{"gitweb.$key"};
2710        } elsif ($type eq 'bool') {
2711                # backward compatibility: 'git config --bool' returns true/false
2712                return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2713        } elsif ($type eq 'int') {
2714                return config_to_int($config{"gitweb.$key"});
2715        }
2716        return $config{"gitweb.$key"};
2717}
2718
2719# get hash of given path at given ref
2720sub git_get_hash_by_path {
2721        my $base = shift;
2722        my $path = shift || return undef;
2723        my $type = shift;
2724
2725        $path =~ s,/+$,,;
2726
2727        open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2728                or die_error(500, "Open git-ls-tree failed");
2729        my $line = <$fd>;
2730        close $fd or return undef;
2731
2732        if (!defined $line) {
2733                # there is no tree or hash given by $path at $base
2734                return undef;
2735        }
2736
2737        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2738        $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2739        if (defined $type && $type ne $2) {
2740                # type doesn't match
2741                return undef;
2742        }
2743        return $3;
2744}
2745
2746# get path of entry with given hash at given tree-ish (ref)
2747# used to get 'from' filename for combined diff (merge commit) for renames
2748sub git_get_path_by_hash {
2749        my $base = shift || return;
2750        my $hash = shift || return;
2751
2752        local $/ = "\0";
2753
2754        open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2755                or return undef;
2756        while (my $line = <$fd>) {
2757                chomp $line;
2758
2759                #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2760                #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2761                if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2762                        close $fd;
2763                        return $1;
2764                }
2765        }
2766        close $fd;
2767        return undef;
2768}
2769
2770## ......................................................................
2771## git utility functions, directly accessing git repository
2772
2773# get the value of config variable either from file named as the variable
2774# itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2775# configuration variable in the repository config file.
2776sub git_get_file_or_project_config {
2777        my ($path, $name) = @_;
2778
2779        $git_dir = "$projectroot/$path";
2780        open my $fd, '<', "$git_dir/$name"
2781                or return git_get_project_config($name);
2782        my $conf = <$fd>;
2783        close $fd;
2784        if (defined $conf) {
2785                chomp $conf;
2786        }
2787        return $conf;
2788}
2789
2790sub git_get_project_description {
2791        my $path = shift;
2792        return git_get_file_or_project_config($path, 'description');
2793}
2794
2795sub git_get_project_category {
2796        my $path = shift;
2797        return git_get_file_or_project_config($path, 'category');
2798}
2799
2800
2801# supported formats:
2802# * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2803#   - if its contents is a number, use it as tag weight,
2804#   - otherwise add a tag with weight 1
2805# * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2806#   the same value multiple times increases tag weight
2807# * `gitweb.ctag' multi-valued repo config variable
2808sub git_get_project_ctags {
2809        my $project = shift;
2810        my $ctags = {};
2811
2812        $git_dir = "$projectroot/$project";
2813        if (opendir my $dh, "$git_dir/ctags") {
2814                my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2815                foreach my $tagfile (@files) {
2816                        open my $ct, '<', $tagfile
2817                                or next;
2818                        my $val = <$ct>;
2819                        chomp $val if $val;
2820                        close $ct;
2821
2822                        (my $ctag = $tagfile) =~ s#.*/##;
2823                        if ($val =~ /^\d+$/) {
2824                                $ctags->{$ctag} = $val;
2825                        } else {
2826                                $ctags->{$ctag} = 1;
2827                        }
2828                }
2829                closedir $dh;
2830
2831        } elsif (open my $fh, '<', "$git_dir/ctags") {
2832                while (my $line = <$fh>) {
2833                        chomp $line;
2834                        $ctags->{$line}++ if $line;
2835                }
2836                close $fh;
2837
2838        } else {
2839                my $taglist = config_to_multi(git_get_project_config('ctag'));
2840                foreach my $tag (@$taglist) {
2841                        $ctags->{$tag}++;
2842                }
2843        }
2844
2845        return $ctags;
2846}
2847
2848# return hash, where keys are content tags ('ctags'),
2849# and values are sum of weights of given tag in every project
2850sub git_gather_all_ctags {
2851        my $projects = shift;
2852        my $ctags = {};
2853
2854        foreach my $p (@$projects) {
2855                foreach my $ct (keys %{$p->{'ctags'}}) {
2856                        $ctags->{$ct} += $p->{'ctags'}->{$ct};
2857                }
2858        }
2859
2860        return $ctags;
2861}
2862
2863sub git_populate_project_tagcloud {
2864        my $ctags = shift;
2865
2866        # First, merge different-cased tags; tags vote on casing
2867        my %ctags_lc;
2868        foreach (keys %$ctags) {
2869                $ctags_lc{lc $_}->{count} += $ctags->{$_};
2870                if (not $ctags_lc{lc $_}->{topcount}
2871                    or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2872                        $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2873                        $ctags_lc{lc $_}->{topname} = $_;
2874                }
2875        }
2876
2877        my $cloud;
2878        my $matched = $input_params{'ctag'};
2879        if (eval { require HTML::TagCloud; 1; }) {
2880                $cloud = HTML::TagCloud->new;
2881                foreach my $ctag (sort keys %ctags_lc) {
2882                        # Pad the title with spaces so that the cloud looks
2883                        # less crammed.
2884                        my $title = esc_html($ctags_lc{$ctag}->{topname});
2885                        $title =~ s/ /&nbsp;/g;
2886                        $title =~ s/^/&nbsp;/g;
2887                        $title =~ s/$/&nbsp;/g;
2888                        if (defined $matched && $matched eq $ctag) {
2889                                $title = qq(<span class="match">$title</span>);
2890                        }
2891                        $cloud->add($title, href(project=>undef, ctag=>$ctag),
2892                                    $ctags_lc{$ctag}->{count});
2893                }
2894        } else {
2895                $cloud = {};
2896                foreach my $ctag (keys %ctags_lc) {
2897                        my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2898                        if (defined $matched && $matched eq $ctag) {
2899                                $title = qq(<span class="match">$title</span>);
2900                        }
2901                        $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2902                        $cloud->{$ctag}{ctag} =
2903                                $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2904                }
2905        }
2906        return $cloud;
2907}
2908
2909sub git_show_project_tagcloud {
2910        my ($cloud, $count) = @_;
2911        if (ref $cloud eq 'HTML::TagCloud') {
2912                return $cloud->html_and_css($count);
2913        } else {
2914                my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2915                return
2916                        '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2917                        join (', ', map {
2918                                $cloud->{$_}->{'ctag'}
2919                        } splice(@tags, 0, $count)) .
2920                        '</div>';
2921        }
2922}
2923
2924sub git_get_project_url_list {
2925        my $path = shift;
2926
2927        $git_dir = "$projectroot/$path";
2928        open my $fd, '<', "$git_dir/cloneurl"
2929                or return wantarray ?
2930                @{ config_to_multi(git_get_project_config('url')) } :
2931                   config_to_multi(git_get_project_config('url'));
2932        my @git_project_url_list = map { chomp; $_ } <$fd>;
2933        close $fd;
2934
2935        return wantarray ? @git_project_url_list : \@git_project_url_list;
2936}
2937
2938sub git_get_projects_list {
2939        my $filter = shift || '';
2940        my $paranoid = shift;
2941        my @list;
2942
2943        if (-d $projects_list) {
2944                # search in directory
2945                my $dir = $projects_list;
2946                # remove the trailing "/"
2947                $dir =~ s!/+$!!;
2948                my $pfxlen = length("$dir");
2949                my $pfxdepth = ($dir =~ tr!/!!);
2950                # when filtering, search only given subdirectory
2951                if ($filter && !$paranoid) {
2952                        $dir .= "/$filter";
2953                        $dir =~ s!/+$!!;
2954                }
2955
2956                File::Find::find({
2957                        follow_fast => 1, # follow symbolic links
2958                        follow_skip => 2, # ignore duplicates
2959                        dangling_symlinks => 0, # ignore dangling symlinks, silently
2960                        wanted => sub {
2961                                # global variables
2962                                our $project_maxdepth;
2963                                our $projectroot;
2964                                # skip project-list toplevel, if we get it.
2965                                return if (m!^[/.]$!);
2966                                # only directories can be git repositories
2967                                return unless (-d $_);
2968                                # don't traverse too deep (Find is super slow on os x)
2969                                # $project_maxdepth excludes depth of $projectroot
2970                                if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2971                                        $File::Find::prune = 1;
2972                                        return;
2973                                }
2974
2975                                my $path = substr($File::Find::name, $pfxlen + 1);
2976                                # paranoidly only filter here
2977                                if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2978                                        next;
2979                                }
2980                                # we check related file in $projectroot
2981                                if (check_export_ok("$projectroot/$path")) {
2982                                        push @list, { path => $path };
2983                                        $File::Find::prune = 1;
2984                                }
2985                        },
2986                }, "$dir");
2987
2988        } elsif (-f $projects_list) {
2989                # read from file(url-encoded):
2990                # 'git%2Fgit.git Linus+Torvalds'
2991                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2992                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2993                open my $fd, '<', $projects_list or return;
2994        PROJECT:
2995                while (my $line = <$fd>) {
2996                        chomp $line;
2997                        my ($path, $owner) = split ' ', $line;
2998                        $path = unescape($path);
2999                        $owner = unescape($owner);
3000                        if (!defined $path) {
3001                                next;
3002                        }
3003                        # if $filter is rpovided, check if $path begins with $filter
3004                        if ($filter && $path !~ m!^\Q$filter\E/!) {
3005                                next;
3006                        }
3007                        if (check_export_ok("$projectroot/$path")) {
3008                                my $pr = {
3009                                        path => $path,
3010                                        owner => to_utf8($owner),
3011                                };
3012                                push @list, $pr;
3013                        }
3014                }
3015                close $fd;
3016        }
3017        return @list;
3018}
3019
3020# written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3021# as side effects it sets 'forks' field to list of forks for forked projects
3022sub filter_forks_from_projects_list {
3023        my $projects = shift;
3024
3025        my %trie; # prefix tree of directories (path components)
3026        # generate trie out of those directories that might contain forks
3027        foreach my $pr (@$projects) {
3028                my $path = $pr->{'path'};
3029                $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3030                next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3031                next unless ($path);      # skip '.git' repository: tests, git-instaweb
3032                next unless (-d "$projectroot/$path"); # containing directory exists
3033                $pr->{'forks'} = [];      # there can be 0 or more forks of project
3034
3035                # add to trie
3036                my @dirs = split('/', $path);
3037                # walk the trie, until either runs out of components or out of trie
3038                my $ref = \%trie;
3039                while (scalar @dirs &&
3040                       exists($ref->{$dirs[0]})) {
3041                        $ref = $ref->{shift @dirs};
3042                }
3043                # create rest of trie structure from rest of components
3044                foreach my $dir (@dirs) {
3045                        $ref = $ref->{$dir} = {};
3046                }
3047                # create end marker, store $pr as a data
3048                $ref->{''} = $pr if (!exists $ref->{''});
3049        }
3050
3051        # filter out forks, by finding shortest prefix match for paths
3052        my @filtered;
3053 PROJECT:
3054        foreach my $pr (@$projects) {
3055                # trie lookup
3056                my $ref = \%trie;
3057        DIR:
3058                foreach my $dir (split('/', $pr->{'path'})) {
3059                        if (exists $ref->{''}) {
3060                                # found [shortest] prefix, is a fork - skip it
3061                                push @{$ref->{''}{'forks'}}, $pr;
3062                                next PROJECT;
3063                        }
3064                        if (!exists $ref->{$dir}) {
3065                                # not in trie, cannot have prefix, not a fork
3066                                push @filtered, $pr;
3067                                next PROJECT;
3068                        }
3069                        # If the dir is there, we just walk one step down the trie.
3070                        $ref = $ref->{$dir};
3071                }
3072                # we ran out of trie
3073                # (shouldn't happen: it's either no match, or end marker)
3074                push @filtered, $pr;
3075        }
3076
3077        return @filtered;
3078}
3079
3080# note: fill_project_list_info must be run first,
3081# for 'descr_long' and 'ctags' to be filled
3082sub search_projects_list {
3083        my ($projlist, %opts) = @_;
3084        my $tagfilter  = $opts{'tagfilter'};
3085        my $search_re = $opts{'search_regexp'};
3086
3087        return @$projlist
3088                unless ($tagfilter || $search_re);
3089
3090        # searching projects require filling to be run before it;
3091        fill_project_list_info($projlist,
3092                               $tagfilter  ? 'ctags' : (),
3093                               $search_re ? ('path', 'descr') : ());
3094        my @projects;
3095 PROJECT:
3096        foreach my $pr (@$projlist) {
3097
3098                if ($tagfilter) {
3099                        next unless ref($pr->{'ctags'}) eq 'HASH';
3100                        next unless
3101                                grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3102                }
3103
3104                if ($search_re) {
3105                        next unless
3106                                $pr->{'path'} =~ /$search_re/ ||
3107                                $pr->{'descr_long'} =~ /$search_re/;
3108                }
3109
3110                push @projects, $pr;
3111        }
3112
3113        return @projects;
3114}
3115
3116our $gitweb_project_owner = undef;
3117sub git_get_project_list_from_file {
3118
3119        return if (defined $gitweb_project_owner);
3120
3121        $gitweb_project_owner = {};
3122        # read from file (url-encoded):
3123        # 'git%2Fgit.git Linus+Torvalds'
3124        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3125        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3126        if (-f $projects_list) {
3127                open(my $fd, '<', $projects_list);
3128                while (my $line = <$fd>) {
3129                        chomp $line;
3130                        my ($pr, $ow) = split ' ', $line;
3131                        $pr = unescape($pr);
3132                        $ow = unescape($ow);
3133                        $gitweb_project_owner->{$pr} = to_utf8($ow);
3134                }
3135                close $fd;
3136        }
3137}
3138
3139sub git_get_project_owner {
3140        my $project = shift;
3141        my $owner;
3142
3143        return undef unless $project;
3144        $git_dir = "$projectroot/$project";
3145
3146        if (!defined $gitweb_project_owner) {
3147                git_get_project_list_from_file();
3148        }
3149
3150        if (exists $gitweb_project_owner->{$project}) {
3151                $owner = $gitweb_project_owner->{$project};
3152        }
3153        if (!defined $owner){
3154                $owner = git_get_project_config('owner');
3155        }
3156        if (!defined $owner) {
3157                $owner = get_file_owner("$git_dir");
3158        }
3159
3160        return $owner;
3161}
3162
3163sub git_get_last_activity {
3164        my ($path) = @_;
3165        my $fd;
3166
3167        $git_dir = "$projectroot/$path";
3168        open($fd, "-|", git_cmd(), 'for-each-ref',
3169             '--format=%(committer)',
3170             '--sort=-committerdate',
3171             '--count=1',
3172             'refs/heads') or return;
3173        my $most_recent = <$fd>;
3174        close $fd or return;
3175        if (defined $most_recent &&
3176            $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3177                my $timestamp = $1;
3178                my $age = time - $timestamp;
3179                return ($age, age_string($age));
3180        }
3181        return (undef, undef);
3182}
3183
3184# Implementation note: when a single remote is wanted, we cannot use 'git
3185# remote show -n' because that command always work (assuming it's a remote URL
3186# if it's not defined), and we cannot use 'git remote show' because that would
3187# try to make a network roundtrip. So the only way to find if that particular
3188# remote is defined is to walk the list provided by 'git remote -v' and stop if
3189# and when we find what we want.
3190sub git_get_remotes_list {
3191        my $wanted = shift;
3192        my %remotes = ();
3193
3194        open my $fd, '-|' , git_cmd(), 'remote', '-v';
3195        return unless $fd;
3196        while (my $remote = <$fd>) {
3197                chomp $remote;
3198                $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3199                next if $wanted and not $remote eq $wanted;
3200                my ($url, $key) = ($1, $2);
3201
3202                $remotes{$remote} ||= { 'heads' => () };
3203                $remotes{$remote}{$key} = $url;
3204        }
3205        close $fd or return;
3206        return wantarray ? %remotes : \%remotes;
3207}
3208
3209# Takes a hash of remotes as first parameter and fills it by adding the
3210# available remote heads for each of the indicated remotes.
3211sub fill_remote_heads {
3212        my $remotes = shift;
3213        my @heads = map { "remotes/$_" } keys %$remotes;
3214        my @remoteheads = git_get_heads_list(undef, @heads);
3215        foreach my $remote (keys %$remotes) {
3216                $remotes->{$remote}{'heads'} = [ grep {
3217                        $_->{'name'} =~ s!^$remote/!!
3218                        } @remoteheads ];
3219        }
3220}
3221
3222sub git_get_references {
3223        my $type = shift || "";
3224        my %refs;
3225        # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3226        # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3227        open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3228                ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3229                or return;
3230
3231        while (my $line = <$fd>) {
3232                chomp $line;
3233                if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3234                        if (defined $refs{$1}) {
3235                                push @{$refs{$1}}, $2;
3236                        } else {
3237                                $refs{$1} = [ $2 ];
3238                        }
3239                }
3240        }
3241        close $fd or return;
3242        return \%refs;
3243}
3244
3245sub git_get_rev_name_tags {
3246        my $hash = shift || return undef;
3247
3248        open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3249                or return;
3250        my $name_rev = <$fd>;
3251        close $fd;
3252
3253        if ($name_rev =~ m|^$hash tags/(.*)$|) {
3254                return $1;
3255        } else {
3256                # catches also '$hash undefined' output
3257                return undef;
3258        }
3259}
3260
3261## ----------------------------------------------------------------------
3262## parse to hash functions
3263
3264sub parse_date {
3265        my $epoch = shift;
3266        my $tz = shift || "-0000";
3267
3268        my %date;
3269        my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3270        my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3271        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3272        $date{'hour'} = $hour;
3273        $date{'minute'} = $min;
3274        $date{'mday'} = $mday;
3275        $date{'day'} = $days[$wday];
3276        $date{'month'} = $months[$mon];
3277        $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3278                             $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3279        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3280                             $mday, $months[$mon], $hour ,$min;
3281        $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3282                             1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3283
3284        my ($tz_sign, $tz_hour, $tz_min) =
3285                ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3286        $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3287        my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3288        ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3289        $date{'hour_local'} = $hour;
3290        $date{'minute_local'} = $min;
3291        $date{'tz_local'} = $tz;
3292        $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3293                                  1900+$year, $mon+1, $mday,
3294                                  $hour, $min, $sec, $tz);
3295        return %date;
3296}
3297
3298sub parse_tag {
3299        my $tag_id = shift;
3300        my %tag;
3301        my @comment;
3302
3303        open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3304        $tag{'id'} = $tag_id;
3305        while (my $line = <$fd>) {
3306                chomp $line;
3307                if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3308                        $tag{'object'} = $1;
3309                } elsif ($line =~ m/^type (.+)$/) {
3310                        $tag{'type'} = $1;
3311                } elsif ($line =~ m/^tag (.+)$/) {
3312                        $tag{'name'} = $1;
3313                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3314                        $tag{'author'} = $1;
3315                        $tag{'author_epoch'} = $2;
3316                        $tag{'author_tz'} = $3;
3317                        if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3318                                $tag{'author_name'}  = $1;
3319                                $tag{'author_email'} = $2;
3320                        } else {
3321                                $tag{'author_name'} = $tag{'author'};
3322                        }
3323                } elsif ($line =~ m/--BEGIN/) {
3324                        push @comment, $line;
3325                        last;
3326                } elsif ($line eq "") {
3327                        last;
3328                }
3329        }
3330        push @comment, <$fd>;
3331        $tag{'comment'} = \@comment;
3332        close $fd or return;
3333        if (!defined $tag{'name'}) {
3334                return
3335        };
3336        return %tag
3337}
3338
3339sub parse_commit_text {
3340        my ($commit_text, $withparents) = @_;
3341        my @commit_lines = split '\n', $commit_text;
3342        my %co;
3343
3344        pop @commit_lines; # Remove '\0'
3345
3346        if (! @commit_lines) {
3347                return;
3348        }
3349
3350        my $header = shift @commit_lines;
3351        if ($header !~ m/^[0-9a-fA-F]{40}/) {
3352                return;
3353        }
3354        ($co{'id'}, my @parents) = split ' ', $header;
3355        while (my $line = shift @commit_lines) {
3356                last if $line eq "\n";
3357                if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3358                        $co{'tree'} = $1;
3359                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3360                        push @parents, $1;
3361                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3362                        $co{'author'} = to_utf8($1);
3363                        $co{'author_epoch'} = $2;
3364                        $co{'author_tz'} = $3;
3365                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3366                                $co{'author_name'}  = $1;
3367                                $co{'author_email'} = $2;
3368                        } else {
3369                                $co{'author_name'} = $co{'author'};
3370                        }
3371                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3372                        $co{'committer'} = to_utf8($1);
3373                        $co{'committer_epoch'} = $2;
3374                        $co{'committer_tz'} = $3;
3375                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3376                                $co{'committer_name'}  = $1;
3377                                $co{'committer_email'} = $2;
3378                        } else {
3379                                $co{'committer_name'} = $co{'committer'};
3380                        }
3381                }
3382        }
3383        if (!defined $co{'tree'}) {
3384                return;
3385        };
3386        $co{'parents'} = \@parents;
3387        $co{'parent'} = $parents[0];
3388
3389        foreach my $title (@commit_lines) {
3390                $title =~ s/^    //;
3391                if ($title ne "") {
3392                        $co{'title'} = chop_str($title, 80, 5);
3393                        # remove leading stuff of merges to make the interesting part visible
3394                        if (length($title) > 50) {
3395                                $title =~ s/^Automatic //;
3396                                $title =~ s/^merge (of|with) /Merge ... /i;
3397                                if (length($title) > 50) {
3398                                        $title =~ s/(http|rsync):\/\///;
3399                                }
3400                                if (length($title) > 50) {
3401                                        $title =~ s/(master|www|rsync)\.//;
3402                                }
3403                                if (length($title) > 50) {
3404                                        $title =~ s/kernel.org:?//;
3405                                }
3406                                if (length($title) > 50) {
3407                                        $title =~ s/\/pub\/scm//;
3408                                }
3409                        }
3410                        $co{'title_short'} = chop_str($title, 50, 5);
3411                        last;
3412                }
3413        }
3414        if (! defined $co{'title'} || $co{'title'} eq "") {
3415                $co{'title'} = $co{'title_short'} = '(no commit message)';
3416        }
3417        # remove added spaces
3418        foreach my $line (@commit_lines) {
3419                $line =~ s/^    //;
3420        }
3421        $co{'comment'} = \@commit_lines;
3422
3423        my $age = time - $co{'committer_epoch'};
3424        $co{'age'} = $age;
3425        $co{'age_string'} = age_string($age);
3426        my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3427        if ($age > 60*60*24*7*2) {
3428                $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3429                $co{'age_string_age'} = $co{'age_string'};
3430        } else {
3431                $co{'age_string_date'} = $co{'age_string'};
3432                $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3433        }
3434        return %co;
3435}
3436
3437sub parse_commit {
3438        my ($commit_id) = @_;
3439        my %co;
3440
3441        local $/ = "\0";
3442
3443        open my $fd, "-|", git_cmd(), "rev-list",
3444                "--parents",
3445                "--header",
3446                "--max-count=1",
3447                $commit_id,
3448                "--",
3449                or die_error(500, "Open git-rev-list failed");
3450        %co = parse_commit_text(<$fd>, 1);
3451        close $fd;
3452
3453        return %co;
3454}
3455
3456sub parse_commits {
3457        my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3458        my @cos;
3459
3460        $maxcount ||= 1;
3461        $skip ||= 0;
3462
3463        local $/ = "\0";
3464
3465        open my $fd, "-|", git_cmd(), "rev-list",
3466                "--header",
3467                @args,
3468                ("--max-count=" . $maxcount),
3469                ("--skip=" . $skip),
3470                @extra_options,
3471                $commit_id,
3472                "--",
3473                ($filename ? ($filename) : ())
3474                or die_error(500, "Open git-rev-list failed");
3475        while (my $line = <$fd>) {
3476                my %co = parse_commit_text($line);
3477                push @cos, \%co;
3478        }
3479        close $fd;
3480
3481        return wantarray ? @cos : \@cos;
3482}
3483
3484# parse line of git-diff-tree "raw" output
3485sub parse_difftree_raw_line {
3486        my $line = shift;
3487        my %res;
3488
3489        # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3490        # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3491        if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3492                $res{'from_mode'} = $1;
3493                $res{'to_mode'} = $2;
3494                $res{'from_id'} = $3;
3495                $res{'to_id'} = $4;
3496                $res{'status'} = $5;
3497                $res{'similarity'} = $6;
3498                if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3499                        ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3500                } else {
3501                        $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3502                }
3503        }
3504        # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3505        # combined diff (for merge commit)
3506        elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3507                $res{'nparents'}  = length($1);
3508                $res{'from_mode'} = [ split(' ', $2) ];
3509                $res{'to_mode'} = pop @{$res{'from_mode'}};
3510                $res{'from_id'} = [ split(' ', $3) ];
3511                $res{'to_id'} = pop @{$res{'from_id'}};
3512                $res{'status'} = [ split('', $4) ];
3513                $res{'to_file'} = unquote($5);
3514        }
3515        # 'c512b523472485aef4fff9e57b229d9d243c967f'
3516        elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3517                $res{'commit'} = $1;
3518        }
3519
3520        return wantarray ? %res : \%res;
3521}
3522
3523# wrapper: return parsed line of git-diff-tree "raw" output
3524# (the argument might be raw line, or parsed info)
3525sub parsed_difftree_line {
3526        my $line_or_ref = shift;
3527
3528        if (ref($line_or_ref) eq "HASH") {
3529                # pre-parsed (or generated by hand)
3530                return $line_or_ref;
3531        } else {
3532                return parse_difftree_raw_line($line_or_ref);
3533        }
3534}
3535
3536# parse line of git-ls-tree output
3537sub parse_ls_tree_line {
3538        my $line = shift;
3539        my %opts = @_;
3540        my %res;
3541
3542        if ($opts{'-l'}) {
3543                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3544                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3545
3546                $res{'mode'} = $1;
3547                $res{'type'} = $2;
3548                $res{'hash'} = $3;
3549                $res{'size'} = $4;
3550                if ($opts{'-z'}) {
3551                        $res{'name'} = $5;
3552                } else {
3553                        $res{'name'} = unquote($5);
3554                }
3555        } else {
3556                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3557                $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3558
3559                $res{'mode'} = $1;
3560                $res{'type'} = $2;
3561                $res{'hash'} = $3;
3562                if ($opts{'-z'}) {
3563                        $res{'name'} = $4;
3564                } else {
3565                        $res{'name'} = unquote($4);
3566                }
3567        }
3568
3569        return wantarray ? %res : \%res;
3570}
3571
3572# generates _two_ hashes, references to which are passed as 2 and 3 argument
3573sub parse_from_to_diffinfo {
3574        my ($diffinfo, $from, $to, @parents) = @_;
3575
3576        if ($diffinfo->{'nparents'}) {
3577                # combined diff
3578                $from->{'file'} = [];
3579                $from->{'href'} = [];
3580                fill_from_file_info($diffinfo, @parents)
3581                        unless exists $diffinfo->{'from_file'};
3582                for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3583                        $from->{'file'}[$i] =
3584                                defined $diffinfo->{'from_file'}[$i] ?
3585                                        $diffinfo->{'from_file'}[$i] :
3586                                        $diffinfo->{'to_file'};
3587                        if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3588                                $from->{'href'}[$i] = href(action=>"blob",
3589                                                           hash_base=>$parents[$i],
3590                                                           hash=>$diffinfo->{'from_id'}[$i],
3591                                                           file_name=>$from->{'file'}[$i]);
3592                        } else {
3593                                $from->{'href'}[$i] = undef;
3594                        }
3595                }
3596        } else {
3597                # ordinary (not combined) diff
3598                $from->{'file'} = $diffinfo->{'from_file'};
3599                if ($diffinfo->{'status'} ne "A") { # not new (added) file
3600                        $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3601                                               hash=>$diffinfo->{'from_id'},
3602                                               file_name=>$from->{'file'});
3603                } else {
3604                        delete $from->{'href'};
3605                }
3606        }
3607
3608        $to->{'file'} = $diffinfo->{'to_file'};
3609        if (!is_deleted($diffinfo)) { # file exists in result
3610                $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3611                                     hash=>$diffinfo->{'to_id'},
3612                                     file_name=>$to->{'file'});
3613        } else {
3614                delete $to->{'href'};
3615        }
3616}
3617
3618## ......................................................................
3619## parse to array of hashes functions
3620
3621sub git_get_heads_list {
3622        my ($limit, @classes) = @_;
3623        @classes = ('heads') unless @classes;
3624        my @patterns = map { "refs/$_" } @classes;
3625        my @headslist;
3626
3627        open my $fd, '-|', git_cmd(), 'for-each-ref',
3628                ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3629                '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3630                @patterns
3631                or return;
3632        while (my $line = <$fd>) {
3633                my %ref_item;
3634
3635                chomp $line;
3636                my ($refinfo, $committerinfo) = split(/\0/, $line);
3637                my ($hash, $name, $title) = split(' ', $refinfo, 3);
3638                my ($committer, $epoch, $tz) =
3639                        ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3640                $ref_item{'fullname'}  = $name;
3641                $name =~ s!^refs/(?:head|remote)s/!!;
3642
3643                $ref_item{'name'}  = $name;
3644                $ref_item{'id'}    = $hash;
3645                $ref_item{'title'} = $title || '(no commit message)';
3646                $ref_item{'epoch'} = $epoch;
3647                if ($epoch) {
3648                        $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3649                } else {
3650                        $ref_item{'age'} = "unknown";
3651                }
3652
3653                push @headslist, \%ref_item;
3654        }
3655        close $fd;
3656
3657        return wantarray ? @headslist : \@headslist;
3658}
3659
3660sub git_get_tags_list {
3661        my $limit = shift;
3662        my @tagslist;
3663
3664        open my $fd, '-|', git_cmd(), 'for-each-ref',
3665                ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3666                '--format=%(objectname) %(objecttype) %(refname) '.
3667                '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3668                'refs/tags'
3669                or return;
3670        while (my $line = <$fd>) {
3671                my %ref_item;
3672
3673                chomp $line;
3674                my ($refinfo, $creatorinfo) = split(/\0/, $line);
3675                my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3676                my ($creator, $epoch, $tz) =
3677                        ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3678                $ref_item{'fullname'} = $name;
3679                $name =~ s!^refs/tags/!!;
3680
3681                $ref_item{'type'} = $type;
3682                $ref_item{'id'} = $id;
3683                $ref_item{'name'} = $name;
3684                if ($type eq "tag") {
3685                        $ref_item{'subject'} = $title;
3686                        $ref_item{'reftype'} = $reftype;
3687                        $ref_item{'refid'}   = $refid;
3688                } else {
3689                        $ref_item{'reftype'} = $type;
3690                        $ref_item{'refid'}   = $id;
3691                }
3692
3693                if ($type eq "tag" || $type eq "commit") {
3694                        $ref_item{'epoch'} = $epoch;
3695                        if ($epoch) {
3696                                $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3697                        } else {
3698                                $ref_item{'age'} = "unknown";
3699                        }
3700                }
3701
3702                push @tagslist, \%ref_item;
3703        }
3704        close $fd;
3705
3706        return wantarray ? @tagslist : \@tagslist;
3707}
3708
3709## ----------------------------------------------------------------------
3710## filesystem-related functions
3711
3712sub get_file_owner {
3713        my $path = shift;
3714
3715        my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3716        my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3717        if (!defined $gcos) {
3718                return undef;
3719        }
3720        my $owner = $gcos;
3721        $owner =~ s/[,;].*$//;
3722        return to_utf8($owner);
3723}
3724
3725# assume that file exists
3726sub insert_file {
3727        my $filename = shift;
3728
3729        open my $fd, '<', $filename;
3730        print map { to_utf8($_) } <$fd>;
3731        close $fd;
3732}
3733
3734## ......................................................................
3735## mimetype related functions
3736
3737sub mimetype_guess_file {
3738        my $filename = shift;
3739        my $mimemap = shift;
3740        -r $mimemap or return undef;
3741
3742        my %mimemap;
3743        open(my $mh, '<', $mimemap) or return undef;
3744        while (<$mh>) {
3745                next if m/^#/; # skip comments
3746                my ($mimetype, @exts) = split(/\s+/);
3747                foreach my $ext (@exts) {
3748                        $mimemap{$ext} = $mimetype;
3749                }
3750        }
3751        close($mh);
3752
3753        $filename =~ /\.([^.]*)$/;
3754        return $mimemap{$1};
3755}
3756
3757sub mimetype_guess {
3758        my $filename = shift;
3759        my $mime;
3760        $filename =~ /\./ or return undef;
3761
3762        if ($mimetypes_file) {
3763                my $file = $mimetypes_file;
3764                if ($file !~ m!^/!) { # if it is relative path
3765                        # it is relative to project
3766                        $file = "$projectroot/$project/$file";
3767                }
3768                $mime = mimetype_guess_file($filename, $file);
3769        }
3770        $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3771        return $mime;
3772}
3773
3774sub blob_mimetype {
3775        my $fd = shift;
3776        my $filename = shift;
3777
3778        if ($filename) {
3779                my $mime = mimetype_guess($filename);
3780                $mime and return $mime;
3781        }
3782
3783        # just in case
3784        return $default_blob_plain_mimetype unless $fd;
3785
3786        if (-T $fd) {
3787                return 'text/plain';
3788        } elsif (! $filename) {
3789                return 'application/octet-stream';
3790        } elsif ($filename =~ m/\.png$/i) {
3791                return 'image/png';
3792        } elsif ($filename =~ m/\.gif$/i) {
3793                return 'image/gif';
3794        } elsif ($filename =~ m/\.jpe?g$/i) {
3795                return 'image/jpeg';
3796        } else {
3797                return 'application/octet-stream';
3798        }
3799}
3800
3801sub blob_contenttype {
3802        my ($fd, $file_name, $type) = @_;
3803
3804        $type ||= blob_mimetype($fd, $file_name);
3805        if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3806                $type .= "; charset=$default_text_plain_charset";
3807        }
3808
3809        return $type;
3810}
3811
3812# guess file syntax for syntax highlighting; return undef if no highlighting
3813# the name of syntax can (in the future) depend on syntax highlighter used
3814sub guess_file_syntax {
3815        my ($highlight, $mimetype, $file_name) = @_;
3816        return undef unless ($highlight && defined $file_name);
3817        my $basename = basename($file_name, '.in');
3818        return $highlight_basename{$basename}
3819                if exists $highlight_basename{$basename};
3820
3821        $basename =~ /\.([^.]*)$/;
3822        my $ext = $1 or return undef;
3823        return $highlight_ext{$ext}
3824                if exists $highlight_ext{$ext};
3825
3826        return undef;
3827}
3828
3829# run highlighter and return FD of its output,
3830# or return original FD if no highlighting
3831sub run_highlighter {
3832        my ($fd, $highlight, $syntax) = @_;
3833        return $fd unless ($highlight && defined $syntax);
3834
3835        close $fd;
3836        open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3837                  quote_command($highlight_bin).
3838                  " --replace-tabs=8 --fragment --syntax $syntax |"
3839                or die_error(500, "Couldn't open file or run syntax highlighter");
3840        return $fd;
3841}
3842
3843## ======================================================================
3844## functions printing HTML: header, footer, error page
3845
3846sub get_page_title {
3847        my $title = to_utf8($site_name);
3848
3849        unless (defined $project) {
3850                if (defined $project_filter) {
3851                        $title .= " - projects in '" . esc_path($project_filter) . "'";
3852                }
3853                return $title;
3854        }
3855        $title .= " - " . to_utf8($project);
3856
3857        return $title unless (defined $action);
3858        $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3859
3860        return $title unless (defined $file_name);
3861        $title .= " - " . esc_path($file_name);
3862        if ($action eq "tree" && $file_name !~ m|/$|) {
3863                $title .= "/";
3864        }
3865
3866        return $title;
3867}
3868
3869sub get_content_type_html {
3870        # require explicit support from the UA if we are to send the page as
3871        # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3872        # we have to do this because MSIE sometimes globs '*/*', pretending to
3873        # support xhtml+xml but choking when it gets what it asked for.
3874        if (defined $cgi->http('HTTP_ACCEPT') &&
3875            $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3876            $cgi->Accept('application/xhtml+xml') != 0) {
3877                return 'application/xhtml+xml';
3878        } else {
3879                return 'text/html';
3880        }
3881}
3882
3883sub print_feed_meta {
3884        if (defined $project) {
3885                my %href_params = get_feed_info();
3886                if (!exists $href_params{'-title'}) {
3887                        $href_params{'-title'} = 'log';
3888                }
3889
3890                foreach my $format (qw(RSS Atom)) {
3891                        my $type = lc($format);
3892                        my %link_attr = (
3893                                '-rel' => 'alternate',
3894                                '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3895                                '-type' => "application/$type+xml"
3896                        );
3897
3898                        $href_params{'action'} = $type;
3899                        $link_attr{'-href'} = href(%href_params);
3900                        print "<link ".
3901                              "rel=\"$link_attr{'-rel'}\" ".
3902                              "title=\"$link_attr{'-title'}\" ".
3903                              "href=\"$link_attr{'-href'}\" ".
3904                              "type=\"$link_attr{'-type'}\" ".
3905                              "/>\n";
3906
3907                        $href_params{'extra_options'} = '--no-merges';
3908                        $link_attr{'-href'} = href(%href_params);
3909                        $link_attr{'-title'} .= ' (no merges)';
3910                        print "<link ".
3911                              "rel=\"$link_attr{'-rel'}\" ".
3912                              "title=\"$link_attr{'-title'}\" ".
3913                              "href=\"$link_attr{'-href'}\" ".
3914                              "type=\"$link_attr{'-type'}\" ".
3915                              "/>\n";
3916                }
3917
3918        } else {
3919                printf('<link rel="alternate" title="%s projects list" '.
3920                       'href="%s" type="text/plain; charset=utf-8" />'."\n",
3921                       esc_attr($site_name), href(project=>undef, action=>"project_index"));
3922                printf('<link rel="alternate" title="%s projects feeds" '.
3923                       'href="%s" type="text/x-opml" />'."\n",
3924                       esc_attr($site_name), href(project=>undef, action=>"opml"));
3925        }
3926}
3927
3928sub print_header_links {
3929        my $status = shift;
3930
3931        # print out each stylesheet that exist, providing backwards capability
3932        # for those people who defined $stylesheet in a config file
3933        if (defined $stylesheet) {
3934                print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3935        } else {
3936                foreach my $stylesheet (@stylesheets) {
3937                        next unless $stylesheet;
3938                        print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3939                }
3940        }
3941        print_feed_meta()
3942                if ($status eq '200 OK');
3943        if (defined $favicon) {
3944                print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3945        }
3946}
3947
3948sub print_nav_breadcrumbs_path {
3949        my $dirprefix = undef;
3950        while (my $part = shift) {
3951                $dirprefix .= "/" if defined $dirprefix;
3952                $dirprefix .= $part;
3953                print $cgi->a({-href => href(project => undef,
3954                                             project_filter => $dirprefix,
3955                                             action => "project_list")},
3956                              esc_html($part)) . " / ";
3957        }
3958}
3959
3960sub print_nav_breadcrumbs {
3961        my %opts = @_;
3962
3963        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3964        if (defined $project) {
3965                my @dirname = split '/', $project;
3966                my $projectbasename = pop @dirname;
3967                print_nav_breadcrumbs_path(@dirname);
3968                print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3969                if (defined $action) {
3970                        my $action_print = $action ;
3971                        if (defined $opts{-action_extra}) {
3972                                $action_print = $cgi->a({-href => href(action=>$action)},
3973                                        $action);
3974                        }
3975                        print " / $action_print";
3976                }
3977                if (defined $opts{-action_extra}) {
3978                        print " / $opts{-action_extra}";
3979                }
3980                print "\n";
3981        } elsif (defined $project_filter) {
3982                print_nav_breadcrumbs_path(split '/', $project_filter);
3983        }
3984}
3985
3986sub print_search_form {
3987        if (!defined $searchtext) {
3988                $searchtext = "";
3989        }
3990        my $search_hash;
3991        if (defined $hash_base) {
3992                $search_hash = $hash_base;
3993        } elsif (defined $hash) {
3994                $search_hash = $hash;
3995        } else {
3996                $search_hash = "HEAD";
3997        }
3998        my $action = $my_uri;
3999        my $use_pathinfo = gitweb_check_feature('pathinfo');
4000        if ($use_pathinfo) {
4001                $action .= "/".esc_url($project);
4002        }
4003        print $cgi->startform(-method => "get", -action => $action) .
4004              "<div class=\"search\">\n" .
4005              (!$use_pathinfo &&
4006              $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4007              $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4008              $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4009              $cgi->popup_menu(-name => 'st', -default => 'commit',
4010                               -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4011              $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4012              " search:\n",
4013              $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4014              "<span title=\"Extended regular expression\">" .
4015              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4016                             -checked => $search_use_regexp) .
4017              "</span>" .
4018              "</div>" .
4019              $cgi->end_form() . "\n";
4020}
4021
4022sub git_header_html {
4023        my $status = shift || "200 OK";
4024        my $expires = shift;
4025        my %opts = @_;
4026
4027        my $title = get_page_title();
4028        my $content_type = get_content_type_html();
4029        print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4030                           -status=> $status, -expires => $expires)
4031                unless ($opts{'-no_http_header'});
4032        my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4033        print <<EOF;
4034<?xml version="1.0" encoding="utf-8"?>
4035<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4036<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4037<!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4038<!-- git core binaries version $git_version -->
4039<head>
4040<meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4041<meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4042<meta name="robots" content="index, nofollow"/>
4043<title>$title</title>
4044EOF
4045        # the stylesheet, favicon etc urls won't work correctly with path_info
4046        # unless we set the appropriate base URL
4047        if ($ENV{'PATH_INFO'}) {
4048                print "<base href=\"".esc_url($base_url)."\" />\n";
4049        }
4050        print_header_links($status);
4051
4052        if (defined $site_html_head_string) {
4053                print to_utf8($site_html_head_string);
4054        }
4055
4056        print "</head>\n" .
4057              "<body>\n";
4058
4059        if (defined $site_header && -f $site_header) {
4060                insert_file($site_header);
4061        }
4062
4063        print "<div class=\"page_header\">\n";
4064        if (defined $logo) {
4065                print $cgi->a({-href => esc_url($logo_url),
4066                               -title => $logo_label},
4067                              $cgi->img({-src => esc_url($logo),
4068                                         -width => 72, -height => 27,
4069                                         -alt => "git",
4070                                         -class => "logo"}));
4071        }
4072        print_nav_breadcrumbs(%opts);
4073        print "</div>\n";
4074
4075        my $have_search = gitweb_check_feature('search');
4076        if (defined $project && $have_search) {
4077                print_search_form();
4078        }
4079}
4080
4081sub git_footer_html {
4082        my $feed_class = 'rss_logo';
4083
4084        print "<div class=\"page_footer\">\n";
4085        if (defined $project) {
4086                my $descr = git_get_project_description($project);
4087                if (defined $descr) {
4088                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4089                }
4090
4091                my %href_params = get_feed_info();
4092                if (!%href_params) {
4093                        $feed_class .= ' generic';
4094                }
4095                $href_params{'-title'} ||= 'log';
4096
4097                foreach my $format (qw(RSS Atom)) {
4098                        $href_params{'action'} = lc($format);
4099                        print $cgi->a({-href => href(%href_params),
4100                                      -title => "$href_params{'-title'} $format feed",
4101                                      -class => $feed_class}, $format)."\n";
4102                }
4103
4104        } else {
4105                print $cgi->a({-href => href(project=>undef, action=>"opml",
4106                                             project_filter => $project_filter),
4107                              -class => $feed_class}, "OPML") . " ";
4108                print $cgi->a({-href => href(project=>undef, action=>"project_index",
4109                                             project_filter => $project_filter),
4110                              -class => $feed_class}, "TXT") . "\n";
4111        }
4112        print "</div>\n"; # class="page_footer"
4113
4114        if (defined $t0 && gitweb_check_feature('timed')) {
4115                print "<div id=\"generating_info\">\n";
4116                print 'This page took '.
4117                      '<span id="generating_time" class="time_span">'.
4118                      tv_interval($t0, [ gettimeofday() ]).
4119                      ' seconds </span>'.
4120                      ' and '.
4121                      '<span id="generating_cmd">'.
4122                      $number_of_git_cmds.
4123                      '</span> git commands '.
4124                      " to generate.\n";
4125                print "</div>\n"; # class="page_footer"
4126        }
4127
4128        if (defined $site_footer && -f $site_footer) {
4129                insert_file($site_footer);
4130        }
4131
4132        print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4133        if (defined $action &&
4134            $action eq 'blame_incremental') {
4135                print qq!<script type="text/javascript">\n!.
4136                      qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4137                      qq!           "!. href() .qq!");\n!.
4138                      qq!</script>\n!;
4139        } else {
4140                my ($jstimezone, $tz_cookie, $datetime_class) =
4141                        gitweb_get_feature('javascript-timezone');
4142
4143                print qq!<script type="text/javascript">\n!.
4144                      qq!window.onload = function () {\n!;
4145                if (gitweb_check_feature('javascript-actions')) {
4146                        print qq!       fixLinks();\n!;
4147                }
4148                if ($jstimezone && $tz_cookie && $datetime_class) {
4149                        print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4150                              qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4151                }
4152                print qq!};\n!.
4153                      qq!</script>\n!;
4154        }
4155
4156        print "</body>\n" .
4157              "</html>";
4158}
4159
4160# die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4161# Example: die_error(404, 'Hash not found')
4162# By convention, use the following status codes (as defined in RFC 2616):
4163# 400: Invalid or missing CGI parameters, or
4164#      requested object exists but has wrong type.
4165# 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4166#      this server or project.
4167# 404: Requested object/revision/project doesn't exist.
4168# 500: The server isn't configured properly, or
4169#      an internal error occurred (e.g. failed assertions caused by bugs), or
4170#      an unknown error occurred (e.g. the git binary died unexpectedly).
4171# 503: The server is currently unavailable (because it is overloaded,
4172#      or down for maintenance).  Generally, this is a temporary state.
4173sub die_error {
4174        my $status = shift || 500;
4175        my $error = esc_html(shift) || "Internal Server Error";
4176        my $extra = shift;
4177        my %opts = @_;
4178
4179        my %http_responses = (
4180                400 => '400 Bad Request',
4181                403 => '403 Forbidden',
4182                404 => '404 Not Found',
4183                500 => '500 Internal Server Error',
4184                503 => '503 Service Unavailable',
4185        );
4186        git_header_html($http_responses{$status}, undef, %opts);
4187        print <<EOF;
4188<div class="page_body">
4189<br /><br />
4190$status - $error
4191<br />
4192EOF
4193        if (defined $extra) {
4194                print "<hr />\n" .
4195                      "$extra\n";
4196        }
4197        print "</div>\n";
4198
4199        git_footer_html();
4200        goto DONE_GITWEB
4201                unless ($opts{'-error_handler'});
4202}
4203
4204## ----------------------------------------------------------------------
4205## functions printing or outputting HTML: navigation
4206
4207sub git_print_page_nav {
4208        my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4209        $extra = '' if !defined $extra; # pager or formats
4210
4211        my @navs = qw(summary shortlog log commit commitdiff tree);
4212        if ($suppress) {
4213                @navs = grep { $_ ne $suppress } @navs;
4214        }
4215
4216        my %arg = map { $_ => {action=>$_} } @navs;
4217        if (defined $head) {
4218                for (qw(commit commitdiff)) {
4219                        $arg{$_}{'hash'} = $head;
4220                }
4221                if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4222                        for (qw(shortlog log)) {
4223                                $arg{$_}{'hash'} = $head;
4224                        }
4225                }
4226        }
4227
4228        $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4229        $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4230
4231        my @actions = gitweb_get_feature('actions');
4232        my %repl = (
4233                '%' => '%',
4234                'n' => $project,         # project name
4235                'f' => $git_dir,         # project path within filesystem
4236                'h' => $treehead || '',  # current hash ('h' parameter)
4237                'b' => $treebase || '',  # hash base ('hb' parameter)
4238        );
4239        while (@actions) {
4240                my ($label, $link, $pos) = splice(@actions,0,3);
4241                # insert
4242                @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4243                # munch munch
4244                $link =~ s/%([%nfhb])/$repl{$1}/g;
4245                $arg{$label}{'_href'} = $link;
4246        }
4247
4248        print "<div class=\"page_nav\">\n" .
4249                (join " | ",
4250                 map { $_ eq $current ?
4251                       $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4252                 } @navs);
4253        print "<br/>\n$extra<br/>\n" .
4254              "</div>\n";
4255}
4256
4257# returns a submenu for the nagivation of the refs views (tags, heads,
4258# remotes) with the current view disabled and the remotes view only
4259# available if the feature is enabled
4260sub format_ref_views {
4261        my ($current) = @_;
4262        my @ref_views = qw{tags heads};
4263        push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4264        return join " | ", map {
4265                $_ eq $current ? $_ :
4266                $cgi->a({-href => href(action=>$_)}, $_)
4267        } @ref_views
4268}
4269
4270sub format_paging_nav {
4271        my ($action, $page, $has_next_link) = @_;
4272        my $paging_nav;
4273
4274
4275        if ($page > 0) {
4276                $paging_nav .=
4277                        $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4278                        " &sdot; " .
4279                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
4280                                 -accesskey => "p", -title => "Alt-p"}, "prev");
4281        } else {
4282                $paging_nav .= "first &sdot; prev";
4283        }
4284
4285        if ($has_next_link) {
4286                $paging_nav .= " &sdot; " .
4287                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
4288                                 -accesskey => "n", -title => "Alt-n"}, "next");
4289        } else {
4290                $paging_nav .= " &sdot; next";
4291        }
4292
4293        return $paging_nav;
4294}
4295
4296## ......................................................................
4297## functions printing or outputting HTML: div
4298
4299sub git_print_header_div {
4300        my ($action, $title, $hash, $hash_base) = @_;
4301        my %args = ();
4302
4303        $args{'action'} = $action;
4304        $args{'hash'} = $hash if $hash;
4305        $args{'hash_base'} = $hash_base if $hash_base;
4306
4307        print "<div class=\"header\">\n" .
4308              $cgi->a({-href => href(%args), -class => "title"},
4309              $title ? $title : $action) .
4310              "\n</div>\n";
4311}
4312
4313sub format_repo_url {
4314        my ($name, $url) = @_;
4315        return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4316}
4317
4318# Group output by placing it in a DIV element and adding a header.
4319# Options for start_div() can be provided by passing a hash reference as the
4320# first parameter to the function.
4321# Options to git_print_header_div() can be provided by passing an array
4322# reference. This must follow the options to start_div if they are present.
4323# The content can be a scalar, which is output as-is, a scalar reference, which
4324# is output after html escaping, an IO handle passed either as *handle or
4325# *handle{IO}, or a function reference. In the latter case all following
4326# parameters will be taken as argument to the content function call.
4327sub git_print_section {
4328        my ($div_args, $header_args, $content);
4329        my $arg = shift;
4330        if (ref($arg) eq 'HASH') {
4331                $div_args = $arg;
4332                $arg = shift;
4333        }
4334        if (ref($arg) eq 'ARRAY') {
4335                $header_args = $arg;
4336                $arg = shift;
4337        }
4338        $content = $arg;
4339
4340        print $cgi->start_div($div_args);
4341        git_print_header_div(@$header_args);
4342
4343        if (ref($content) eq 'CODE') {
4344                $content->(@_);
4345        } elsif (ref($content) eq 'SCALAR') {
4346                print esc_html($$content);
4347        } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4348                print <$content>;
4349        } elsif (!ref($content) && defined($content)) {
4350                print $content;
4351        }
4352
4353        print $cgi->end_div;
4354}
4355
4356sub format_timestamp_html {
4357        my $date = shift;
4358        my $strtime = $date->{'rfc2822'};
4359
4360        my (undef, undef, $datetime_class) =
4361                gitweb_get_feature('javascript-timezone');
4362        if ($datetime_class) {
4363                $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4364        }
4365
4366        my $localtime_format = '(%02d:%02d %s)';
4367        if ($date->{'hour_local'} < 6) {
4368                $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4369        }
4370        $strtime .= ' ' .
4371                    sprintf($localtime_format,
4372                            $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4373
4374        return $strtime;
4375}
4376
4377# Outputs the author name and date in long form
4378sub git_print_authorship {
4379        my $co = shift;
4380        my %opts = @_;
4381        my $tag = $opts{-tag} || 'div';
4382        my $author = $co->{'author_name'};
4383
4384        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4385        print "<$tag class=\"author_date\">" .
4386              format_search_author($author, "author", esc_html($author)) .
4387              " [".format_timestamp_html(\%ad)."]".
4388              git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4389              "</$tag>\n";
4390}
4391
4392# Outputs table rows containing the full author or committer information,
4393# in the format expected for 'commit' view (& similar).
4394# Parameters are a commit hash reference, followed by the list of people
4395# to output information for. If the list is empty it defaults to both
4396# author and committer.
4397sub git_print_authorship_rows {
4398        my $co = shift;
4399        # too bad we can't use @people = @_ || ('author', 'committer')
4400        my @people = @_;
4401        @people = ('author', 'committer') unless @people;
4402        foreach my $who (@people) {
4403                my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4404                print "<tr><td>$who</td><td>" .
4405                      format_search_author($co->{"${who}_name"}, $who,
4406                                           esc_html($co->{"${who}_name"})) . " " .
4407                      format_search_author($co->{"${who}_email"}, $who,
4408                                           esc_html("<" . $co->{"${who}_email"} . ">")) .
4409                      "</td><td rowspan=\"2\">" .
4410                      git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4411                      "</td></tr>\n" .
4412                      "<tr>" .
4413                      "<td></td><td>" .
4414                      format_timestamp_html(\%wd) .
4415                      "</td>" .
4416                      "</tr>\n";
4417        }
4418}
4419
4420sub git_print_page_path {
4421        my $name = shift;
4422        my $type = shift;
4423        my $hb = shift;
4424
4425
4426        print "<div class=\"page_path\">";
4427        print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4428                      -title => 'tree root'}, to_utf8("[$project]"));
4429        print " / ";
4430        if (defined $name) {
4431                my @dirname = split '/', $name;
4432                my $basename = pop @dirname;
4433                my $fullname = '';
4434
4435                foreach my $dir (@dirname) {
4436                        $fullname .= ($fullname ? '/' : '') . $dir;
4437                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4438                                                     hash_base=>$hb),
4439                                      -title => $fullname}, esc_path($dir));
4440                        print " / ";
4441                }
4442                if (defined $type && $type eq 'blob') {
4443                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4444                                                     hash_base=>$hb),
4445                                      -title => $name}, esc_path($basename));
4446                } elsif (defined $type && $type eq 'tree') {
4447                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4448                                                     hash_base=>$hb),
4449                                      -title => $name}, esc_path($basename));
4450                        print " / ";
4451                } else {
4452                        print esc_path($basename);
4453                }
4454        }
4455        print "<br/></div>\n";
4456}
4457
4458sub git_print_log {
4459        my $log = shift;
4460        my %opts = @_;
4461
4462        if ($opts{'-remove_title'}) {
4463                # remove title, i.e. first line of log
4464                shift @$log;
4465        }
4466        # remove leading empty lines
4467        while (defined $log->[0] && $log->[0] eq "") {
4468                shift @$log;
4469        }
4470
4471        # print log
4472        my $signoff = 0;
4473        my $empty = 0;
4474        foreach my $line (@$log) {
4475                if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4476                        $signoff = 1;
4477                        $empty = 0;
4478                        if (! $opts{'-remove_signoff'}) {
4479                                print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4480                                next;
4481                        } else {
4482                                # remove signoff lines
4483                                next;
4484                        }
4485                } else {
4486                        $signoff = 0;
4487                }
4488
4489                # print only one empty line
4490                # do not print empty line after signoff
4491                if ($line eq "") {
4492                        next if ($empty || $signoff);
4493                        $empty = 1;
4494                } else {
4495                        $empty = 0;
4496                }
4497
4498                print format_log_line_html($line) . "<br/>\n";
4499        }
4500
4501        if ($opts{'-final_empty_line'}) {
4502                # end with single empty line
4503                print "<br/>\n" unless $empty;
4504        }
4505}
4506
4507# return link target (what link points to)
4508sub git_get_link_target {
4509        my $hash = shift;
4510        my $link_target;
4511
4512        # read link
4513        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4514                or return;
4515        {
4516                local $/ = undef;
4517                $link_target = <$fd>;
4518        }
4519        close $fd
4520                or return;
4521
4522        return $link_target;
4523}
4524
4525# given link target, and the directory (basedir) the link is in,
4526# return target of link relative to top directory (top tree);
4527# return undef if it is not possible (including absolute links).
4528sub normalize_link_target {
4529        my ($link_target, $basedir) = @_;
4530
4531        # absolute symlinks (beginning with '/') cannot be normalized
4532        return if (substr($link_target, 0, 1) eq '/');
4533
4534        # normalize link target to path from top (root) tree (dir)
4535        my $path;
4536        if ($basedir) {
4537                $path = $basedir . '/' . $link_target;
4538        } else {
4539                # we are in top (root) tree (dir)
4540                $path = $link_target;
4541        }
4542
4543        # remove //, /./, and /../
4544        my @path_parts;
4545        foreach my $part (split('/', $path)) {
4546                # discard '.' and ''
4547                next if (!$part || $part eq '.');
4548                # handle '..'
4549                if ($part eq '..') {
4550                        if (@path_parts) {
4551                                pop @path_parts;
4552                        } else {
4553                                # link leads outside repository (outside top dir)
4554                                return;
4555                        }
4556                } else {
4557                        push @path_parts, $part;
4558                }
4559        }
4560        $path = join('/', @path_parts);
4561
4562        return $path;
4563}
4564
4565# print tree entry (row of git_tree), but without encompassing <tr> element
4566sub git_print_tree_entry {
4567        my ($t, $basedir, $hash_base, $have_blame) = @_;
4568
4569        my %base_key = ();
4570        $base_key{'hash_base'} = $hash_base if defined $hash_base;
4571
4572        # The format of a table row is: mode list link.  Where mode is
4573        # the mode of the entry, list is the name of the entry, an href,
4574        # and link is the action links of the entry.
4575
4576        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4577        if (exists $t->{'size'}) {
4578                print "<td class=\"size\">$t->{'size'}</td>\n";
4579        }
4580        if ($t->{'type'} eq "blob") {
4581                print "<td class=\"list\">" .
4582                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4583                                               file_name=>"$basedir$t->{'name'}", %base_key),
4584                                -class => "list"}, esc_path($t->{'name'}));
4585                if (S_ISLNK(oct $t->{'mode'})) {
4586                        my $link_target = git_get_link_target($t->{'hash'});
4587                        if ($link_target) {
4588                                my $norm_target = normalize_link_target($link_target, $basedir);
4589                                if (defined $norm_target) {
4590                                        print " -> " .
4591                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4592                                                                     file_name=>$norm_target),
4593                                                       -title => $norm_target}, esc_path($link_target));
4594                                } else {
4595                                        print " -> " . esc_path($link_target);
4596                                }
4597                        }
4598                }
4599                print "</td>\n";
4600                print "<td class=\"link\">";
4601                print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4602                                             file_name=>"$basedir$t->{'name'}", %base_key)},
4603                              "blob");
4604                if ($have_blame) {
4605                        print " | " .
4606                              $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4607                                                     file_name=>"$basedir$t->{'name'}", %base_key)},
4608                                      "blame");
4609                }
4610                if (defined $hash_base) {
4611                        print " | " .
4612                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4613                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4614                                      "history");
4615                }
4616                print " | " .
4617                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4618                                               file_name=>"$basedir$t->{'name'}")},
4619                                "raw");
4620                print "</td>\n";
4621
4622        } elsif ($t->{'type'} eq "tree") {
4623                print "<td class=\"list\">";
4624                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4625                                             file_name=>"$basedir$t->{'name'}",
4626                                             %base_key)},
4627                              esc_path($t->{'name'}));
4628                print "</td>\n";
4629                print "<td class=\"link\">";
4630                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4631                                             file_name=>"$basedir$t->{'name'}",
4632                                             %base_key)},
4633                              "tree");
4634                if (defined $hash_base) {
4635                        print " | " .
4636                              $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4637                                                     file_name=>"$basedir$t->{'name'}")},
4638                                      "history");
4639                }
4640                print "</td>\n";
4641        } else {
4642                # unknown object: we can only present history for it
4643                # (this includes 'commit' object, i.e. submodule support)
4644                print "<td class=\"list\">" .
4645                      esc_path($t->{'name'}) .
4646                      "</td>\n";
4647                print "<td class=\"link\">";
4648                if (defined $hash_base) {
4649                        print $cgi->a({-href => href(action=>"history",
4650                                                     hash_base=>$hash_base,
4651                                                     file_name=>"$basedir$t->{'name'}")},
4652                                      "history");
4653                }
4654                print "</td>\n";
4655        }
4656}
4657
4658## ......................................................................
4659## functions printing large fragments of HTML
4660
4661# get pre-image filenames for merge (combined) diff
4662sub fill_from_file_info {
4663        my ($diff, @parents) = @_;
4664
4665        $diff->{'from_file'} = [ ];
4666        $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4667        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4668                if ($diff->{'status'}[$i] eq 'R' ||
4669                    $diff->{'status'}[$i] eq 'C') {
4670                        $diff->{'from_file'}[$i] =
4671                                git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4672                }
4673        }
4674
4675        return $diff;
4676}
4677
4678# is current raw difftree line of file deletion
4679sub is_deleted {
4680        my $diffinfo = shift;
4681
4682        return $diffinfo->{'to_id'} eq ('0' x 40);
4683}
4684
4685# does patch correspond to [previous] difftree raw line
4686# $diffinfo  - hashref of parsed raw diff format
4687# $patchinfo - hashref of parsed patch diff format
4688#              (the same keys as in $diffinfo)
4689sub is_patch_split {
4690        my ($diffinfo, $patchinfo) = @_;
4691
4692        return defined $diffinfo && defined $patchinfo
4693                && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4694}
4695
4696
4697sub git_difftree_body {
4698        my ($difftree, $hash, @parents) = @_;
4699        my ($parent) = $parents[0];
4700        my $have_blame = gitweb_check_feature('blame');
4701        print "<div class=\"list_head\">\n";
4702        if ($#{$difftree} > 10) {
4703                print(($#{$difftree} + 1) . " files changed:\n");
4704        }
4705        print "</div>\n";
4706
4707        print "<table class=\"" .
4708              (@parents > 1 ? "combined " : "") .
4709              "diff_tree\">\n";
4710
4711        # header only for combined diff in 'commitdiff' view
4712        my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4713        if ($has_header) {
4714                # table header
4715                print "<thead><tr>\n" .
4716                       "<th></th><th></th>\n"; # filename, patchN link
4717                for (my $i = 0; $i < @parents; $i++) {
4718                        my $par = $parents[$i];
4719                        print "<th>" .
4720                              $cgi->a({-href => href(action=>"commitdiff",
4721                                                     hash=>$hash, hash_parent=>$par),
4722                                       -title => 'commitdiff to parent number ' .
4723                                                  ($i+1) . ': ' . substr($par,0,7)},
4724                                      $i+1) .
4725                              "&nbsp;</th>\n";
4726                }
4727                print "</tr></thead>\n<tbody>\n";
4728        }
4729
4730        my $alternate = 1;
4731        my $patchno = 0;
4732        foreach my $line (@{$difftree}) {
4733                my $diff = parsed_difftree_line($line);
4734
4735                if ($alternate) {
4736                        print "<tr class=\"dark\">\n";
4737                } else {
4738                        print "<tr class=\"light\">\n";
4739                }
4740                $alternate ^= 1;
4741
4742                if (exists $diff->{'nparents'}) { # combined diff
4743
4744                        fill_from_file_info($diff, @parents)
4745                                unless exists $diff->{'from_file'};
4746
4747                        if (!is_deleted($diff)) {
4748                                # file exists in the result (child) commit
4749                                print "<td>" .
4750                                      $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4751                                                             file_name=>$diff->{'to_file'},
4752                                                             hash_base=>$hash),
4753                                              -class => "list"}, esc_path($diff->{'to_file'})) .
4754                                      "</td>\n";
4755                        } else {
4756                                print "<td>" .
4757                                      esc_path($diff->{'to_file'}) .
4758                                      "</td>\n";
4759                        }
4760
4761                        if ($action eq 'commitdiff') {
4762                                # link to patch
4763                                $patchno++;
4764                                print "<td class=\"link\">" .
4765                                      $cgi->a({-href => href(-anchor=>"patch$patchno")},
4766                                              "patch") .
4767                                      " | " .
4768                                      "</td>\n";
4769                        }
4770
4771                        my $has_history = 0;
4772                        my $not_deleted = 0;
4773                        for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4774                                my $hash_parent = $parents[$i];
4775                                my $from_hash = $diff->{'from_id'}[$i];
4776                                my $from_path = $diff->{'from_file'}[$i];
4777                                my $status = $diff->{'status'}[$i];
4778
4779                                $has_history ||= ($status ne 'A');
4780                                $not_deleted ||= ($status ne 'D');
4781
4782                                if ($status eq 'A') {
4783                                        print "<td  class=\"link\" align=\"right\"> | </td>\n";
4784                                } elsif ($status eq 'D') {
4785                                        print "<td class=\"link\">" .
4786                                              $cgi->a({-href => href(action=>"blob",
4787                                                                     hash_base=>$hash,
4788                                                                     hash=>$from_hash,
4789                                                                     file_name=>$from_path)},
4790                                                      "blob" . ($i+1)) .
4791                                              " | </td>\n";
4792                                } else {
4793                                        if ($diff->{'to_id'} eq $from_hash) {
4794                                                print "<td class=\"link nochange\">";
4795                                        } else {
4796                                                print "<td class=\"link\">";
4797                                        }
4798                                        print $cgi->a({-href => href(action=>"blobdiff",
4799                                                                     hash=>$diff->{'to_id'},
4800                                                                     hash_parent=>$from_hash,
4801                                                                     hash_base=>$hash,
4802                                                                     hash_parent_base=>$hash_parent,
4803                                                                     file_name=>$diff->{'to_file'},
4804                                                                     file_parent=>$from_path)},
4805                                                      "diff" . ($i+1)) .
4806                                              " | </td>\n";
4807                                }
4808                        }
4809
4810                        print "<td class=\"link\">";
4811                        if ($not_deleted) {
4812                                print $cgi->a({-href => href(action=>"blob",
4813                                                             hash=>$diff->{'to_id'},
4814                                                             file_name=>$diff->{'to_file'},
4815                                                             hash_base=>$hash)},
4816                                              "blob");
4817                                print " | " if ($has_history);
4818                        }
4819                        if ($has_history) {
4820                                print $cgi->a({-href => href(action=>"history",
4821                                                             file_name=>$diff->{'to_file'},
4822                                                             hash_base=>$hash)},
4823                                              "history");
4824                        }
4825                        print "</td>\n";
4826
4827                        print "</tr>\n";
4828                        next; # instead of 'else' clause, to avoid extra indent
4829                }
4830                # else ordinary diff
4831
4832                my ($to_mode_oct, $to_mode_str, $to_file_type);
4833                my ($from_mode_oct, $from_mode_str, $from_file_type);
4834                if ($diff->{'to_mode'} ne ('0' x 6)) {
4835                        $to_mode_oct = oct $diff->{'to_mode'};
4836                        if (S_ISREG($to_mode_oct)) { # only for regular file
4837                                $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4838                        }
4839                        $to_file_type = file_type($diff->{'to_mode'});
4840                }
4841                if ($diff->{'from_mode'} ne ('0' x 6)) {
4842                        $from_mode_oct = oct $diff->{'from_mode'};
4843                        if (S_ISREG($from_mode_oct)) { # only for regular file
4844                                $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4845                        }
4846                        $from_file_type = file_type($diff->{'from_mode'});
4847                }
4848
4849                if ($diff->{'status'} eq "A") { # created
4850                        my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4851                        $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4852                        $mode_chng   .= "]</span>";
4853                        print "<td>";
4854                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4855                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4856                                      -class => "list"}, esc_path($diff->{'file'}));
4857                        print "</td>\n";
4858                        print "<td>$mode_chng</td>\n";
4859                        print "<td class=\"link\">";
4860                        if ($action eq 'commitdiff') {
4861                                # link to patch
4862                                $patchno++;
4863                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4864                                              "patch") .
4865                                      " | ";
4866                        }
4867                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4868                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4869                                      "blob");
4870                        print "</td>\n";
4871
4872                } elsif ($diff->{'status'} eq "D") { # deleted
4873                        my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4874                        print "<td>";
4875                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4876                                                     hash_base=>$parent, file_name=>$diff->{'file'}),
4877                                       -class => "list"}, esc_path($diff->{'file'}));
4878                        print "</td>\n";
4879                        print "<td>$mode_chng</td>\n";
4880                        print "<td class=\"link\">";
4881                        if ($action eq 'commitdiff') {
4882                                # link to patch
4883                                $patchno++;
4884                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4885                                              "patch") .
4886                                      " | ";
4887                        }
4888                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4889                                                     hash_base=>$parent, file_name=>$diff->{'file'})},
4890                                      "blob") . " | ";
4891                        if ($have_blame) {
4892                                print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4893                                                             file_name=>$diff->{'file'})},
4894                                              "blame") . " | ";
4895                        }
4896                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4897                                                     file_name=>$diff->{'file'})},
4898                                      "history");
4899                        print "</td>\n";
4900
4901                } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4902                        my $mode_chnge = "";
4903                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4904                                $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4905                                if ($from_file_type ne $to_file_type) {
4906                                        $mode_chnge .= " from $from_file_type to $to_file_type";
4907                                }
4908                                if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4909                                        if ($from_mode_str && $to_mode_str) {
4910                                                $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4911                                        } elsif ($to_mode_str) {
4912                                                $mode_chnge .= " mode: $to_mode_str";
4913                                        }
4914                                }
4915                                $mode_chnge .= "]</span>\n";
4916                        }
4917                        print "<td>";
4918                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4919                                                     hash_base=>$hash, file_name=>$diff->{'file'}),
4920                                      -class => "list"}, esc_path($diff->{'file'}));
4921                        print "</td>\n";
4922                        print "<td>$mode_chnge</td>\n";
4923                        print "<td class=\"link\">";
4924                        if ($action eq 'commitdiff') {
4925                                # link to patch
4926                                $patchno++;
4927                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4928                                              "patch") .
4929                                      " | ";
4930                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4931                                # "commit" view and modified file (not onlu mode changed)
4932                                print $cgi->a({-href => href(action=>"blobdiff",
4933                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4934                                                             hash_base=>$hash, hash_parent_base=>$parent,
4935                                                             file_name=>$diff->{'file'})},
4936                                              "diff") .
4937                                      " | ";
4938                        }
4939                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4940                                                     hash_base=>$hash, file_name=>$diff->{'file'})},
4941                                       "blob") . " | ";
4942                        if ($have_blame) {
4943                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4944                                                             file_name=>$diff->{'file'})},
4945                                              "blame") . " | ";
4946                        }
4947                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4948                                                     file_name=>$diff->{'file'})},
4949                                      "history");
4950                        print "</td>\n";
4951
4952                } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4953                        my %status_name = ('R' => 'moved', 'C' => 'copied');
4954                        my $nstatus = $status_name{$diff->{'status'}};
4955                        my $mode_chng = "";
4956                        if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4957                                # mode also for directories, so we cannot use $to_mode_str
4958                                $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4959                        }
4960                        print "<td>" .
4961                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4962                                                     hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4963                                      -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4964                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4965                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4966                                                     hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4967                                      -class => "list"}, esc_path($diff->{'from_file'})) .
4968                              " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4969                              "<td class=\"link\">";
4970                        if ($action eq 'commitdiff') {
4971                                # link to patch
4972                                $patchno++;
4973                                print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4974                                              "patch") .
4975                                      " | ";
4976                        } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4977                                # "commit" view and modified file (not only pure rename or copy)
4978                                print $cgi->a({-href => href(action=>"blobdiff",
4979                                                             hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4980                                                             hash_base=>$hash, hash_parent_base=>$parent,
4981                                                             file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4982                                              "diff") .
4983                                      " | ";
4984                        }
4985                        print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4986                                                     hash_base=>$parent, file_name=>$diff->{'to_file'})},
4987                                      "blob") . " | ";
4988                        if ($have_blame) {
4989                                print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4990                                                             file_name=>$diff->{'to_file'})},
4991                                              "blame") . " | ";
4992                        }
4993                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4994                                                    file_name=>$diff->{'to_file'})},
4995                                      "history");
4996                        print "</td>\n";
4997
4998                } # we should not encounter Unmerged (U) or Unknown (X) status
4999                print "</tr>\n";
5000        }
5001        print "</tbody>" if $has_header;
5002        print "</table>\n";
5003}
5004
5005# Print context lines and then rem/add lines in a side-by-side manner.
5006sub print_sidebyside_diff_lines {
5007        my ($ctx, $rem, $add) = @_;
5008
5009        # print context block before add/rem block
5010        if (@$ctx) {
5011                print join '',
5012                        '<div class="chunk_block ctx">',
5013                                '<div class="old">',
5014                                @$ctx,
5015                                '</div>',
5016                                '<div class="new">',
5017                                @$ctx,
5018                                '</div>',
5019                        '</div>';
5020        }
5021
5022        if (!@$add) {
5023                # pure removal
5024                print join '',
5025                        '<div class="chunk_block rem">',
5026                                '<div class="old">',
5027                                @$rem,
5028                                '</div>',
5029                        '</div>';
5030        } elsif (!@$rem) {
5031                # pure addition
5032                print join '',
5033                        '<div class="chunk_block add">',
5034                                '<div class="new">',
5035                                @$add,
5036                                '</div>',
5037                        '</div>';
5038        } else {
5039                print join '',
5040                        '<div class="chunk_block chg">',
5041                                '<div class="old">',
5042                                @$rem,
5043                                '</div>',
5044                                '<div class="new">',
5045                                @$add,
5046                                '</div>',
5047                        '</div>';
5048        }
5049}
5050
5051# Print context lines and then rem/add lines in inline manner.
5052sub print_inline_diff_lines {
5053        my ($ctx, $rem, $add) = @_;
5054
5055        print @$ctx, @$rem, @$add;
5056}
5057
5058# Print context lines and then rem/add lines.
5059sub print_diff_lines {
5060        my ($ctx, $rem, $add, $diff_style, $is_combined) = @_;
5061
5062        if ($diff_style eq 'sidebyside' && !$is_combined) {
5063                print_sidebyside_diff_lines($ctx, $rem, $add);
5064        } else {
5065                # default 'inline' style and unknown styles
5066                print_inline_diff_lines($ctx, $rem, $add);
5067        }
5068}
5069
5070sub print_diff_chunk {
5071        my ($diff_style, $is_combined, $from, $to, @chunk) = @_;
5072        my (@ctx, @rem, @add);
5073
5074        # The class of the previous line.
5075        my $prev_class = '';
5076
5077        return unless @chunk;
5078
5079        # incomplete last line might be among removed or added lines,
5080        # or both, or among context lines: find which
5081        for (my $i = 1; $i < @chunk; $i++) {
5082                if ($chunk[$i][0] eq 'incomplete') {
5083                        $chunk[$i][0] = $chunk[$i-1][0];
5084                }
5085        }
5086
5087        # guardian
5088        push @chunk, ["", ""];
5089
5090        foreach my $line_info (@chunk) {
5091                my ($class, $line) = @$line_info;
5092
5093                $line = format_diff_line($line, $class, $from, $to);
5094
5095                # print chunk headers
5096                if ($class && $class eq 'chunk_header') {
5097                        print $line;
5098                        next;
5099                }
5100
5101                ## print from accumulator when have some add/rem lines or end
5102                # of chunk (flush context lines), or when have add and rem
5103                # lines and new block is reached (otherwise add/rem lines could
5104                # be reordered)
5105                if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5106                    (@rem && @add && $class ne $prev_class)) {
5107                        print_diff_lines(\@ctx, \@rem, \@add,
5108                                         $diff_style, $is_combined);
5109                        @ctx = @rem = @add = ();
5110                }
5111
5112                ## adding lines to accumulator
5113                # guardian value
5114                last unless $line;
5115                # rem, add or change
5116                if ($class eq 'rem') {
5117                        push @rem, $line;
5118                } elsif ($class eq 'add') {
5119                        push @add, $line;
5120                }
5121                # context line
5122                if ($class eq 'ctx') {
5123                        push @ctx, $line;
5124                }
5125
5126                $prev_class = $class;
5127        }
5128}
5129
5130sub git_patchset_body {
5131        my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5132        my ($hash_parent) = $hash_parents[0];
5133
5134        my $is_combined = (@hash_parents > 1);
5135        my $patch_idx = 0;
5136        my $patch_number = 0;
5137        my $patch_line;
5138        my $diffinfo;
5139        my $to_name;
5140        my (%from, %to);
5141        my @chunk; # for side-by-side diff
5142
5143        print "<div class=\"patchset\">\n";
5144
5145        # skip to first patch
5146        while ($patch_line = <$fd>) {
5147                chomp $patch_line;
5148
5149                last if ($patch_line =~ m/^diff /);
5150        }
5151
5152 PATCH:
5153        while ($patch_line) {
5154
5155                # parse "git diff" header line
5156                if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5157                        # $1 is from_name, which we do not use
5158                        $to_name = unquote($2);
5159                        $to_name =~ s!^b/!!;
5160                } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5161                        # $1 is 'cc' or 'combined', which we do not use
5162                        $to_name = unquote($2);
5163                } else {
5164                        $to_name = undef;
5165                }
5166
5167                # check if current patch belong to current raw line
5168                # and parse raw git-diff line if needed
5169                if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5170                        # this is continuation of a split patch
5171                        print "<div class=\"patch cont\">\n";
5172                } else {
5173                        # advance raw git-diff output if needed
5174                        $patch_idx++ if defined $diffinfo;
5175
5176                        # read and prepare patch information
5177                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5178
5179                        # compact combined diff output can have some patches skipped
5180                        # find which patch (using pathname of result) we are at now;
5181                        if ($is_combined) {
5182                                while ($to_name ne $diffinfo->{'to_file'}) {
5183                                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5184                                              format_diff_cc_simplified($diffinfo, @hash_parents) .
5185                                              "</div>\n";  # class="patch"
5186
5187                                        $patch_idx++;
5188                                        $patch_number++;
5189
5190                                        last if $patch_idx > $#$difftree;
5191                                        $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5192                                }
5193                        }
5194
5195                        # modifies %from, %to hashes
5196                        parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5197
5198                        # this is first patch for raw difftree line with $patch_idx index
5199                        # we index @$difftree array from 0, but number patches from 1
5200                        print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5201                }
5202
5203                # git diff header
5204                #assert($patch_line =~ m/^diff /) if DEBUG;
5205                #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5206                $patch_number++;
5207                # print "git diff" header
5208                print format_git_diff_header_line($patch_line, $diffinfo,
5209                                                  \%from, \%to);
5210
5211                # print extended diff header
5212                print "<div class=\"diff extended_header\">\n";
5213        EXTENDED_HEADER:
5214                while ($patch_line = <$fd>) {
5215                        chomp $patch_line;
5216
5217                        last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5218
5219                        print format_extended_diff_header_line($patch_line, $diffinfo,
5220                                                               \%from, \%to);
5221                }
5222                print "</div>\n"; # class="diff extended_header"
5223
5224                # from-file/to-file diff header
5225                if (! $patch_line) {
5226                        print "</div>\n"; # class="patch"
5227                        last PATCH;
5228                }
5229                next PATCH if ($patch_line =~ m/^diff /);
5230                #assert($patch_line =~ m/^---/) if DEBUG;
5231
5232                my $last_patch_line = $patch_line;
5233                $patch_line = <$fd>;
5234                chomp $patch_line;
5235                #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5236
5237                print format_diff_from_to_header($last_patch_line, $patch_line,
5238                                                 $diffinfo, \%from, \%to,
5239                                                 @hash_parents);
5240
5241                # the patch itself
5242        LINE:
5243                while ($patch_line = <$fd>) {
5244                        chomp $patch_line;
5245
5246                        next PATCH if ($patch_line =~ m/^diff /);
5247
5248                        my $class = diff_line_class($patch_line, \%from, \%to);
5249
5250                        if ($class eq 'chunk_header') {
5251                                print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5252                                @chunk = ();
5253                        }
5254
5255                        push @chunk, [ $class, $patch_line ];
5256                }
5257
5258        } continue {
5259                if (@chunk) {
5260                        print_diff_chunk($diff_style, $is_combined, \%from, \%to, @chunk);
5261                        @chunk = ();
5262                }
5263                print "</div>\n"; # class="patch"
5264        }
5265
5266        # for compact combined (--cc) format, with chunk and patch simplification
5267        # the patchset might be empty, but there might be unprocessed raw lines
5268        for (++$patch_idx if $patch_number > 0;
5269             $patch_idx < @$difftree;
5270             ++$patch_idx) {
5271                # read and prepare patch information
5272                $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5273
5274                # generate anchor for "patch" links in difftree / whatchanged part
5275                print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5276                      format_diff_cc_simplified($diffinfo, @hash_parents) .
5277                      "</div>\n";  # class="patch"
5278
5279                $patch_number++;
5280        }
5281
5282        if ($patch_number == 0) {
5283                if (@hash_parents > 1) {
5284                        print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5285                } else {
5286                        print "<div class=\"diff nodifferences\">No differences found</div>\n";
5287                }
5288        }
5289
5290        print "</div>\n"; # class="patchset"
5291}
5292
5293# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5294
5295sub git_project_search_form {
5296        my ($searchtext, $search_use_regexp) = @_;
5297
5298        my $limit = '';
5299        if ($project_filter) {
5300                $limit = " in '$project_filter/'";
5301        }
5302
5303        print "<div class=\"projsearch\">\n";
5304        print $cgi->startform(-method => 'get', -action => $my_uri) .
5305              $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5306        print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5307                if (defined $project_filter);
5308        print $cgi->textfield(-name => 's', -value => $searchtext,
5309                              -title => "Search project by name and description$limit",
5310                              -size => 60) . "\n" .
5311              "<span title=\"Extended regular expression\">" .
5312              $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5313                             -checked => $search_use_regexp) .
5314              "</span>\n" .
5315              $cgi->submit(-name => 'btnS', -value => 'Search') .
5316              $cgi->end_form() . "\n" .
5317              $cgi->a({-href => href(project => undef, searchtext => undef,
5318                                     project_filter => $project_filter)},
5319                      esc_html("List all projects$limit")) . "<br />\n";
5320        print "</div>\n";
5321}
5322
5323# entry for given @keys needs filling if at least one of keys in list
5324# is not present in %$project_info
5325sub project_info_needs_filling {
5326        my ($project_info, @keys) = @_;
5327
5328        # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5329        foreach my $key (@keys) {
5330                if (!exists $project_info->{$key}) {
5331                        return 1;
5332                }
5333        }
5334        return;
5335}
5336
5337# fills project list info (age, description, owner, category, forks, etc.)
5338# for each project in the list, removing invalid projects from
5339# returned list, or fill only specified info.
5340#
5341# Invalid projects are removed from the returned list if and only if you
5342# ask 'age' or 'age_string' to be filled, because they are the only fields
5343# that run unconditionally git command that requires repository, and
5344# therefore do always check if project repository is invalid.
5345#
5346# USAGE:
5347# * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5348#   ensures that 'descr_long' and 'ctags' fields are filled
5349# * @project_list = fill_project_list_info(\@project_list)
5350#   ensures that all fields are filled (and invalid projects removed)
5351#
5352# NOTE: modifies $projlist, but does not remove entries from it
5353sub fill_project_list_info {
5354        my ($projlist, @wanted_keys) = @_;
5355        my @projects;
5356        my $filter_set = sub { return @_; };
5357        if (@wanted_keys) {
5358                my %wanted_keys = map { $_ => 1 } @wanted_keys;
5359                $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5360        }
5361
5362        my $show_ctags = gitweb_check_feature('ctags');
5363 PROJECT:
5364        foreach my $pr (@$projlist) {
5365                if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5366                        my (@activity) = git_get_last_activity($pr->{'path'});
5367                        unless (@activity) {
5368                                next PROJECT;
5369                        }
5370                        ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5371                }
5372                if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5373                        my $descr = git_get_project_description($pr->{'path'}) || "";
5374                        $descr = to_utf8($descr);
5375                        $pr->{'descr_long'} = $descr;
5376                        $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5377                }
5378                if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5379                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5380                }
5381                if ($show_ctags &&
5382                    project_info_needs_filling($pr, $filter_set->('ctags'))) {
5383                        $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5384                }
5385                if ($projects_list_group_categories &&
5386                    project_info_needs_filling($pr, $filter_set->('category'))) {
5387                        my $cat = git_get_project_category($pr->{'path'}) ||
5388                                                           $project_list_default_category;
5389                        $pr->{'category'} = to_utf8($cat);
5390                }
5391
5392                push @projects, $pr;
5393        }
5394
5395        return @projects;
5396}
5397
5398sub sort_projects_list {
5399        my ($projlist, $order) = @_;
5400        my @projects;
5401
5402        my %order_info = (
5403                project => { key => 'path', type => 'str' },
5404                descr => { key => 'descr_long', type => 'str' },
5405                owner => { key => 'owner', type => 'str' },
5406                age => { key => 'age', type => 'num' }
5407        );
5408        my $oi = $order_info{$order};
5409        return @$projlist unless defined $oi;
5410        if ($oi->{'type'} eq 'str') {
5411                @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5412        } else {
5413                @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5414        }
5415
5416        return @projects;
5417}
5418
5419# returns a hash of categories, containing the list of project
5420# belonging to each category
5421sub build_projlist_by_category {
5422        my ($projlist, $from, $to) = @_;
5423        my %categories;
5424
5425        $from = 0 unless defined $from;
5426        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5427
5428        for (my $i = $from; $i <= $to; $i++) {
5429                my $pr = $projlist->[$i];
5430                push @{$categories{ $pr->{'category'} }}, $pr;
5431        }
5432
5433        return wantarray ? %categories : \%categories;
5434}
5435
5436# print 'sort by' <th> element, generating 'sort by $name' replay link
5437# if that order is not selected
5438sub print_sort_th {
5439        print format_sort_th(@_);
5440}
5441
5442sub format_sort_th {
5443        my ($name, $order, $header) = @_;
5444        my $sort_th = "";
5445        $header ||= ucfirst($name);
5446
5447        if ($order eq $name) {
5448                $sort_th .= "<th>$header</th>\n";
5449        } else {
5450                $sort_th .= "<th>" .
5451                            $cgi->a({-href => href(-replay=>1, order=>$name),
5452                                     -class => "header"}, $header) .
5453                            "</th>\n";
5454        }
5455
5456        return $sort_th;
5457}
5458
5459sub git_project_list_rows {
5460        my ($projlist, $from, $to, $check_forks) = @_;
5461
5462        $from = 0 unless defined $from;
5463        $to = $#$projlist if (!defined $to || $#$projlist < $to);
5464
5465        my $alternate = 1;
5466        for (my $i = $from; $i <= $to; $i++) {
5467                my $pr = $projlist->[$i];
5468
5469                if ($alternate) {
5470                        print "<tr class=\"dark\">\n";
5471                } else {
5472                        print "<tr class=\"light\">\n";
5473                }
5474                $alternate ^= 1;
5475
5476                if ($check_forks) {
5477                        print "<td>";
5478                        if ($pr->{'forks'}) {
5479                                my $nforks = scalar @{$pr->{'forks'}};
5480                                if ($nforks > 0) {
5481                                        print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5482                                                       -title => "$nforks forks"}, "+");
5483                                } else {
5484                                        print $cgi->span({-title => "$nforks forks"}, "+");
5485                                }
5486                        }
5487                        print "</td>\n";
5488                }
5489                print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5490                                        -class => "list"},
5491                                       esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5492                      "</td>\n" .
5493                      "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5494                                        -class => "list",
5495                                        -title => $pr->{'descr_long'}},
5496                                        $search_regexp
5497                                        ? esc_html_match_hl_chopped($pr->{'descr_long'},
5498                                                                    $pr->{'descr'}, $search_regexp)
5499                                        : esc_html($pr->{'descr'})) .
5500                      "</td>\n" .
5501                      "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5502                print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5503                      (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5504                      "<td class=\"link\">" .
5505                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5506                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5507                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5508                      $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5509                      ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5510                      "</td>\n" .
5511                      "</tr>\n";
5512        }
5513}
5514
5515sub git_project_list_body {
5516        # actually uses global variable $project
5517        my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5518        my @projects = @$projlist;
5519
5520        my $check_forks = gitweb_check_feature('forks');
5521        my $show_ctags  = gitweb_check_feature('ctags');
5522        my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5523        $check_forks = undef
5524                if ($tagfilter || $search_regexp);
5525
5526        # filtering out forks before filling info allows to do less work
5527        @projects = filter_forks_from_projects_list(\@projects)
5528                if ($check_forks);
5529        # search_projects_list pre-fills required info
5530        @projects = search_projects_list(\@projects,
5531                                         'search_regexp' => $search_regexp,
5532                                         'tagfilter'  => $tagfilter)
5533                if ($tagfilter || $search_regexp);
5534        # fill the rest
5535        @projects = fill_project_list_info(\@projects);
5536
5537        $order ||= $default_projects_order;
5538        $from = 0 unless defined $from;
5539        $to = $#projects if (!defined $to || $#projects < $to);
5540
5541        # short circuit
5542        if ($from > $to) {
5543                print "<center>\n".
5544                      "<b>No such projects found</b><br />\n".
5545                      "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5546                      "</center>\n<br />\n";
5547                return;
5548        }
5549
5550        @projects = sort_projects_list(\@projects, $order);
5551
5552        if ($show_ctags) {
5553                my $ctags = git_gather_all_ctags(\@projects);
5554                my $cloud = git_populate_project_tagcloud($ctags);
5555                print git_show_project_tagcloud($cloud, 64);
5556        }
5557
5558        print "<table class=\"project_list\">\n";
5559        unless ($no_header) {
5560                print "<tr>\n";
5561                if ($check_forks) {
5562                        print "<th></th>\n";
5563                }
5564                print_sort_th('project', $order, 'Project');
5565                print_sort_th('descr', $order, 'Description');
5566                print_sort_th('owner', $order, 'Owner');
5567                print_sort_th('age', $order, 'Last Change');
5568                print "<th></th>\n" . # for links
5569                      "</tr>\n";
5570        }
5571
5572        if ($projects_list_group_categories) {
5573                # only display categories with projects in the $from-$to window
5574                @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5575                my %categories = build_projlist_by_category(\@projects, $from, $to);
5576                foreach my $cat (sort keys %categories) {
5577                        unless ($cat eq "") {
5578                                print "<tr>\n";
5579                                if ($check_forks) {
5580                                        print "<td></td>\n";
5581                                }
5582                                print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5583                                print "</tr>\n";
5584                        }
5585
5586                        git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5587                }
5588        } else {
5589                git_project_list_rows(\@projects, $from, $to, $check_forks);
5590        }
5591
5592        if (defined $extra) {
5593                print "<tr>\n";
5594                if ($check_forks) {
5595                        print "<td></td>\n";
5596                }
5597                print "<td colspan=\"5\">$extra</td>\n" .
5598                      "</tr>\n";
5599        }
5600        print "</table>\n";
5601}
5602
5603sub git_log_body {
5604        # uses global variable $project
5605        my ($commitlist, $from, $to, $refs, $extra) = @_;
5606
5607        $from = 0 unless defined $from;
5608        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5609
5610        for (my $i = 0; $i <= $to; $i++) {
5611                my %co = %{$commitlist->[$i]};
5612                next if !%co;
5613                my $commit = $co{'id'};
5614                my $ref = format_ref_marker($refs, $commit);
5615                git_print_header_div('commit',
5616                               "<span class=\"age\">$co{'age_string'}</span>" .
5617                               esc_html($co{'title'}) . $ref,
5618                               $commit);
5619                print "<div class=\"title_text\">\n" .
5620                      "<div class=\"log_link\">\n" .
5621                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5622                      " | " .
5623                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5624                      " | " .
5625                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5626                      "<br/>\n" .
5627                      "</div>\n";
5628                      git_print_authorship(\%co, -tag => 'span');
5629                      print "<br/>\n</div>\n";
5630
5631                print "<div class=\"log_body\">\n";
5632                git_print_log($co{'comment'}, -final_empty_line=> 1);
5633                print "</div>\n";
5634        }
5635        if ($extra) {
5636                print "<div class=\"page_nav\">\n";
5637                print "$extra\n";
5638                print "</div>\n";
5639        }
5640}
5641
5642sub git_shortlog_body {
5643        # uses global variable $project
5644        my ($commitlist, $from, $to, $refs, $extra) = @_;
5645
5646        $from = 0 unless defined $from;
5647        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5648
5649        print "<table class=\"shortlog\">\n";
5650        my $alternate = 1;
5651        for (my $i = $from; $i <= $to; $i++) {
5652                my %co = %{$commitlist->[$i]};
5653                my $commit = $co{'id'};
5654                my $ref = format_ref_marker($refs, $commit);
5655                if ($alternate) {
5656                        print "<tr class=\"dark\">\n";
5657                } else {
5658                        print "<tr class=\"light\">\n";
5659                }
5660                $alternate ^= 1;
5661                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5662                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5663                      format_author_html('td', \%co, 10) . "<td>";
5664                print format_subject_html($co{'title'}, $co{'title_short'},
5665                                          href(action=>"commit", hash=>$commit), $ref);
5666                print "</td>\n" .
5667                      "<td class=\"link\">" .
5668                      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5669                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5670                      $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5671                my $snapshot_links = format_snapshot_links($commit);
5672                if (defined $snapshot_links) {
5673                        print " | " . $snapshot_links;
5674                }
5675                print "</td>\n" .
5676                      "</tr>\n";
5677        }
5678        if (defined $extra) {
5679                print "<tr>\n" .
5680                      "<td colspan=\"4\">$extra</td>\n" .
5681                      "</tr>\n";
5682        }
5683        print "</table>\n";
5684}
5685
5686sub git_history_body {
5687        # Warning: assumes constant type (blob or tree) during history
5688        my ($commitlist, $from, $to, $refs, $extra,
5689            $file_name, $file_hash, $ftype) = @_;
5690
5691        $from = 0 unless defined $from;
5692        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5693
5694        print "<table class=\"history\">\n";
5695        my $alternate = 1;
5696        for (my $i = $from; $i <= $to; $i++) {
5697                my %co = %{$commitlist->[$i]};
5698                if (!%co) {
5699                        next;
5700                }
5701                my $commit = $co{'id'};
5702
5703                my $ref = format_ref_marker($refs, $commit);
5704
5705                if ($alternate) {
5706                        print "<tr class=\"dark\">\n";
5707                } else {
5708                        print "<tr class=\"light\">\n";
5709                }
5710                $alternate ^= 1;
5711                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5712        # shortlog:   format_author_html('td', \%co, 10)
5713                      format_author_html('td', \%co, 15, 3) . "<td>";
5714                # originally git_history used chop_str($co{'title'}, 50)
5715                print format_subject_html($co{'title'}, $co{'title_short'},
5716                                          href(action=>"commit", hash=>$commit), $ref);
5717                print "</td>\n" .
5718                      "<td class=\"link\">" .
5719                      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5720                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5721
5722                if ($ftype eq 'blob') {
5723                        my $blob_current = $file_hash;
5724                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5725                        if (defined $blob_current && defined $blob_parent &&
5726                                        $blob_current ne $blob_parent) {
5727                                print " | " .
5728                                        $cgi->a({-href => href(action=>"blobdiff",
5729                                                               hash=>$blob_current, hash_parent=>$blob_parent,
5730                                                               hash_base=>$hash_base, hash_parent_base=>$commit,
5731                                                               file_name=>$file_name)},
5732                                                "diff to current");
5733                        }
5734                }
5735                print "</td>\n" .
5736                      "</tr>\n";
5737        }
5738        if (defined $extra) {
5739                print "<tr>\n" .
5740                      "<td colspan=\"4\">$extra</td>\n" .
5741                      "</tr>\n";
5742        }
5743        print "</table>\n";
5744}
5745
5746sub git_tags_body {
5747        # uses global variable $project
5748        my ($taglist, $from, $to, $extra) = @_;
5749        $from = 0 unless defined $from;
5750        $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5751
5752        print "<table class=\"tags\">\n";
5753        my $alternate = 1;
5754        for (my $i = $from; $i <= $to; $i++) {
5755                my $entry = $taglist->[$i];
5756                my %tag = %$entry;
5757                my $comment = $tag{'subject'};
5758                my $comment_short;
5759                if (defined $comment) {
5760                        $comment_short = chop_str($comment, 30, 5);
5761                }
5762                if ($alternate) {
5763                        print "<tr class=\"dark\">\n";
5764                } else {
5765                        print "<tr class=\"light\">\n";
5766                }
5767                $alternate ^= 1;
5768                if (defined $tag{'age'}) {
5769                        print "<td><i>$tag{'age'}</i></td>\n";
5770                } else {
5771                        print "<td></td>\n";
5772                }
5773                print "<td>" .
5774                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5775                               -class => "list name"}, esc_html($tag{'name'})) .
5776                      "</td>\n" .
5777                      "<td>";
5778                if (defined $comment) {
5779                        print format_subject_html($comment, $comment_short,
5780                                                  href(action=>"tag", hash=>$tag{'id'}));
5781                }
5782                print "</td>\n" .
5783                      "<td class=\"selflink\">";
5784                if ($tag{'type'} eq "tag") {
5785                        print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5786                } else {
5787                        print "&nbsp;";
5788                }
5789                print "</td>\n" .
5790                      "<td class=\"link\">" . " | " .
5791                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5792                if ($tag{'reftype'} eq "commit") {
5793                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5794                              " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5795                } elsif ($tag{'reftype'} eq "blob") {
5796                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5797                }
5798                print "</td>\n" .
5799                      "</tr>";
5800        }
5801        if (defined $extra) {
5802                print "<tr>\n" .
5803                      "<td colspan=\"5\">$extra</td>\n" .
5804                      "</tr>\n";
5805        }
5806        print "</table>\n";
5807}
5808
5809sub git_heads_body {
5810        # uses global variable $project
5811        my ($headlist, $head_at, $from, $to, $extra) = @_;
5812        $from = 0 unless defined $from;
5813        $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5814
5815        print "<table class=\"heads\">\n";
5816        my $alternate = 1;
5817        for (my $i = $from; $i <= $to; $i++) {
5818                my $entry = $headlist->[$i];
5819                my %ref = %$entry;
5820                my $curr = defined $head_at && $ref{'id'} eq $head_at;
5821                if ($alternate) {
5822                        print "<tr class=\"dark\">\n";
5823                } else {
5824                        print "<tr class=\"light\">\n";
5825                }
5826                $alternate ^= 1;
5827                print "<td><i>$ref{'age'}</i></td>\n" .
5828                      ($curr ? "<td class=\"current_head\">" : "<td>") .
5829                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5830                               -class => "list name"},esc_html($ref{'name'})) .
5831                      "</td>\n" .
5832                      "<td class=\"link\">" .
5833                      $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5834                      $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5835                      $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5836                      "</td>\n" .
5837                      "</tr>";
5838        }
5839        if (defined $extra) {
5840                print "<tr>\n" .
5841                      "<td colspan=\"3\">$extra</td>\n" .
5842                      "</tr>\n";
5843        }
5844        print "</table>\n";
5845}
5846
5847# Display a single remote block
5848sub git_remote_block {
5849        my ($remote, $rdata, $limit, $head) = @_;
5850
5851        my $heads = $rdata->{'heads'};
5852        my $fetch = $rdata->{'fetch'};
5853        my $push = $rdata->{'push'};
5854
5855        my $urls_table = "<table class=\"projects_list\">\n" ;
5856
5857        if (defined $fetch) {
5858                if ($fetch eq $push) {
5859                        $urls_table .= format_repo_url("URL", $fetch);
5860                } else {
5861                        $urls_table .= format_repo_url("Fetch URL", $fetch);
5862                        $urls_table .= format_repo_url("Push URL", $push) if defined $push;
5863                }
5864        } elsif (defined $push) {
5865                $urls_table .= format_repo_url("Push URL", $push);
5866        } else {
5867                $urls_table .= format_repo_url("", "No remote URL");
5868        }
5869
5870        $urls_table .= "</table>\n";
5871
5872        my $dots;
5873        if (defined $limit && $limit < @$heads) {
5874                $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
5875        }
5876
5877        print $urls_table;
5878        git_heads_body($heads, $head, 0, $limit, $dots);
5879}
5880
5881# Display a list of remote names with the respective fetch and push URLs
5882sub git_remotes_list {
5883        my ($remotedata, $limit) = @_;
5884        print "<table class=\"heads\">\n";
5885        my $alternate = 1;
5886        my @remotes = sort keys %$remotedata;
5887
5888        my $limited = $limit && $limit < @remotes;
5889
5890        $#remotes = $limit - 1 if $limited;
5891
5892        while (my $remote = shift @remotes) {
5893                my $rdata = $remotedata->{$remote};
5894                my $fetch = $rdata->{'fetch'};
5895                my $push = $rdata->{'push'};
5896                if ($alternate) {
5897                        print "<tr class=\"dark\">\n";
5898                } else {
5899                        print "<tr class=\"light\">\n";
5900                }
5901                $alternate ^= 1;
5902                print "<td>" .
5903                      $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
5904                               -class=> "list name"},esc_html($remote)) .
5905                      "</td>";
5906                print "<td class=\"link\">" .
5907                      (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
5908                      " | " .
5909                      (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
5910                      "</td>";
5911
5912                print "</tr>\n";
5913        }
5914
5915        if ($limited) {
5916                print "<tr>\n" .
5917                      "<td colspan=\"3\">" .
5918                      $cgi->a({-href => href(action=>"remotes")}, "...") .
5919                      "</td>\n" . "</tr>\n";
5920        }
5921
5922        print "</table>";
5923}
5924
5925# Display remote heads grouped by remote, unless there are too many
5926# remotes, in which case we only display the remote names
5927sub git_remotes_body {
5928        my ($remotedata, $limit, $head) = @_;
5929        if ($limit and $limit < keys %$remotedata) {
5930                git_remotes_list($remotedata, $limit);
5931        } else {
5932                fill_remote_heads($remotedata);
5933                while (my ($remote, $rdata) = each %$remotedata) {
5934                        git_print_section({-class=>"remote", -id=>$remote},
5935                                ["remotes", $remote, $remote], sub {
5936                                        git_remote_block($remote, $rdata, $limit, $head);
5937                                });
5938                }
5939        }
5940}
5941
5942sub git_search_message {
5943        my %co = @_;
5944
5945        my $greptype;
5946        if ($searchtype eq 'commit') {
5947                $greptype = "--grep=";
5948        } elsif ($searchtype eq 'author') {
5949                $greptype = "--author=";
5950        } elsif ($searchtype eq 'committer') {
5951                $greptype = "--committer=";
5952        }
5953        $greptype .= $searchtext;
5954        my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5955                                       $greptype, '--regexp-ignore-case',
5956                                       $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5957
5958        my $paging_nav = '';
5959        if ($page > 0) {
5960                $paging_nav .=
5961                        $cgi->a({-href => href(-replay=>1, page=>undef)},
5962                                "first") .
5963                        " &sdot; " .
5964                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
5965                                 -accesskey => "p", -title => "Alt-p"}, "prev");
5966        } else {
5967                $paging_nav .= "first &sdot; prev";
5968        }
5969        my $next_link = '';
5970        if ($#commitlist >= 100) {
5971                $next_link =
5972                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
5973                                 -accesskey => "n", -title => "Alt-n"}, "next");
5974                $paging_nav .= " &sdot; $next_link";
5975        } else {
5976                $paging_nav .= " &sdot; next";
5977        }
5978
5979        git_header_html();
5980
5981        git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5982        git_print_header_div('commit', esc_html($co{'title'}), $hash);
5983        if ($page == 0 && !@commitlist) {
5984                print "<p>No match.</p>\n";
5985        } else {
5986                git_search_grep_body(\@commitlist, 0, 99, $next_link);
5987        }
5988
5989        git_footer_html();
5990}
5991
5992sub git_search_changes {
5993        my %co = @_;
5994
5995        local $/ = "\n";
5996        open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5997                '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5998                ($search_use_regexp ? '--pickaxe-regex' : ())
5999                        or die_error(500, "Open git-log failed");
6000
6001        git_header_html();
6002
6003        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6004        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6005
6006        print "<table class=\"pickaxe search\">\n";
6007        my $alternate = 1;
6008        undef %co;
6009        my @files;
6010        while (my $line = <$fd>) {
6011                chomp $line;
6012                next unless $line;
6013
6014                my %set = parse_difftree_raw_line($line);
6015                if (defined $set{'commit'}) {
6016                        # finish previous commit
6017                        if (%co) {
6018                                print "</td>\n" .
6019                                      "<td class=\"link\">" .
6020                                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6021                                              "commit") .
6022                                      " | " .
6023                                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6024                                                             hash_base=>$co{'id'})},
6025                                              "tree") .
6026                                      "</td>\n" .
6027                                      "</tr>\n";
6028                        }
6029
6030                        if ($alternate) {
6031                                print "<tr class=\"dark\">\n";
6032                        } else {
6033                                print "<tr class=\"light\">\n";
6034                        }
6035                        $alternate ^= 1;
6036                        %co = parse_commit($set{'commit'});
6037                        my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6038                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6039                              "<td><i>$author</i></td>\n" .
6040                              "<td>" .
6041                              $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6042                                      -class => "list subject"},
6043                                      chop_and_escape_str($co{'title'}, 50) . "<br/>");
6044                } elsif (defined $set{'to_id'}) {
6045                        next if ($set{'to_id'} =~ m/^0{40}$/);
6046
6047                        print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6048                                                     hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6049                                      -class => "list"},
6050                                      "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6051                              "<br/>\n";
6052                }
6053        }
6054        close $fd;
6055
6056        # finish last commit (warning: repetition!)
6057        if (%co) {
6058                print "</td>\n" .
6059                      "<td class=\"link\">" .
6060                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6061                              "commit") .
6062                      " | " .
6063                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6064                                             hash_base=>$co{'id'})},
6065                              "tree") .
6066                      "</td>\n" .
6067                      "</tr>\n";
6068        }
6069
6070        print "</table>\n";
6071
6072        git_footer_html();
6073}
6074
6075sub git_search_files {
6076        my %co = @_;
6077
6078        local $/ = "\n";
6079        open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6080                $search_use_regexp ? ('-E', '-i') : '-F',
6081                $searchtext, $co{'tree'}
6082                        or die_error(500, "Open git-grep failed");
6083
6084        git_header_html();
6085
6086        git_print_page_nav('','', $hash,$co{'tree'},$hash);
6087        git_print_header_div('commit', esc_html($co{'title'}), $hash);
6088
6089        print "<table class=\"grep_search\">\n";
6090        my $alternate = 1;
6091        my $matches = 0;
6092        my $lastfile = '';
6093        my $file_href;
6094        while (my $line = <$fd>) {
6095                chomp $line;
6096                my ($file, $lno, $ltext, $binary);
6097                last if ($matches++ > 1000);
6098                if ($line =~ /^Binary file (.+) matches$/) {
6099                        $file = $1;
6100                        $binary = 1;
6101                } else {
6102                        ($file, $lno, $ltext) = split(/\0/, $line, 3);
6103                        $file =~ s/^$co{'tree'}://;
6104                }
6105                if ($file ne $lastfile) {
6106                        $lastfile and print "</td></tr>\n";
6107                        if ($alternate++) {
6108                                print "<tr class=\"dark\">\n";
6109                        } else {
6110                                print "<tr class=\"light\">\n";
6111                        }
6112                        $file_href = href(action=>"blob", hash_base=>$co{'id'},
6113                                          file_name=>$file);
6114                        print "<td class=\"list\">".
6115                                $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6116                        print "</td><td>\n";
6117                        $lastfile = $file;
6118                }
6119                if ($binary) {
6120                        print "<div class=\"binary\">Binary file</div>\n";
6121                } else {
6122                        $ltext = untabify($ltext);
6123                        if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6124                                $ltext = esc_html($1, -nbsp=>1);
6125                                $ltext .= '<span class="match">';
6126                                $ltext .= esc_html($2, -nbsp=>1);
6127                                $ltext .= '</span>';
6128                                $ltext .= esc_html($3, -nbsp=>1);
6129                        } else {
6130                                $ltext = esc_html($ltext, -nbsp=>1);
6131                        }
6132                        print "<div class=\"pre\">" .
6133                                $cgi->a({-href => $file_href.'#l'.$lno,
6134                                        -class => "linenr"}, sprintf('%4i', $lno)) .
6135                                ' ' .  $ltext . "</div>\n";
6136                }
6137        }
6138        if ($lastfile) {
6139                print "</td></tr>\n";
6140                if ($matches > 1000) {
6141                        print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6142                }
6143        } else {
6144                print "<div class=\"diff nodifferences\">No matches found</div>\n";
6145        }
6146        close $fd;
6147
6148        print "</table>\n";
6149
6150        git_footer_html();
6151}
6152
6153sub git_search_grep_body {
6154        my ($commitlist, $from, $to, $extra) = @_;
6155        $from = 0 unless defined $from;
6156        $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6157
6158        print "<table class=\"commit_search\">\n";
6159        my $alternate = 1;
6160        for (my $i = $from; $i <= $to; $i++) {
6161                my %co = %{$commitlist->[$i]};
6162                if (!%co) {
6163                        next;
6164                }
6165                my $commit = $co{'id'};
6166                if ($alternate) {
6167                        print "<tr class=\"dark\">\n";
6168                } else {
6169                        print "<tr class=\"light\">\n";
6170                }
6171                $alternate ^= 1;
6172                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6173                      format_author_html('td', \%co, 15, 5) .
6174                      "<td>" .
6175                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6176                               -class => "list subject"},
6177                              chop_and_escape_str($co{'title'}, 50) . "<br/>");
6178                my $comment = $co{'comment'};
6179                foreach my $line (@$comment) {
6180                        if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6181                                my ($lead, $match, $trail) = ($1, $2, $3);
6182                                $match = chop_str($match, 70, 5, 'center');
6183                                my $contextlen = int((80 - length($match))/2);
6184                                $contextlen = 30 if ($contextlen > 30);
6185                                $lead  = chop_str($lead,  $contextlen, 10, 'left');
6186                                $trail = chop_str($trail, $contextlen, 10, 'right');
6187
6188                                $lead  = esc_html($lead);
6189                                $match = esc_html($match);
6190                                $trail = esc_html($trail);
6191
6192                                print "$lead<span class=\"match\">$match</span>$trail<br />";
6193                        }
6194                }
6195                print "</td>\n" .
6196                      "<td class=\"link\">" .
6197                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6198                      " | " .
6199                      $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6200                      " | " .
6201                      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6202                print "</td>\n" .
6203                      "</tr>\n";
6204        }
6205        if (defined $extra) {
6206                print "<tr>\n" .
6207                      "<td colspan=\"3\">$extra</td>\n" .
6208                      "</tr>\n";
6209        }
6210        print "</table>\n";
6211}
6212
6213## ======================================================================
6214## ======================================================================
6215## actions
6216
6217sub git_project_list {
6218        my $order = $input_params{'order'};
6219        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6220                die_error(400, "Unknown order parameter");
6221        }
6222
6223        my @list = git_get_projects_list($project_filter, $strict_export);
6224        if (!@list) {
6225                die_error(404, "No projects found");
6226        }
6227
6228        git_header_html();
6229        if (defined $home_text && -f $home_text) {
6230                print "<div class=\"index_include\">\n";
6231                insert_file($home_text);
6232                print "</div>\n";
6233        }
6234
6235        git_project_search_form($searchtext, $search_use_regexp);
6236        git_project_list_body(\@list, $order);
6237        git_footer_html();
6238}
6239
6240sub git_forks {
6241        my $order = $input_params{'order'};
6242        if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6243                die_error(400, "Unknown order parameter");
6244        }
6245
6246        my $filter = $project;
6247        $filter =~ s/\.git$//;
6248        my @list = git_get_projects_list($filter);
6249        if (!@list) {
6250                die_error(404, "No forks found");
6251        }
6252
6253        git_header_html();
6254        git_print_page_nav('','');
6255        git_print_header_div('summary', "$project forks");
6256        git_project_list_body(\@list, $order);
6257        git_footer_html();
6258}
6259
6260sub git_project_index {
6261        my @projects = git_get_projects_list($project_filter, $strict_export);
6262        if (!@projects) {
6263                die_error(404, "No projects found");
6264        }
6265
6266        print $cgi->header(
6267                -type => 'text/plain',
6268                -charset => 'utf-8',
6269                -content_disposition => 'inline; filename="index.aux"');
6270
6271        foreach my $pr (@projects) {
6272                if (!exists $pr->{'owner'}) {
6273                        $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6274                }
6275
6276                my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6277                # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6278                $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6279                $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6280                $path  =~ s/ /\+/g;
6281                $owner =~ s/ /\+/g;
6282
6283                print "$path $owner\n";
6284        }
6285}
6286
6287sub git_summary {
6288        my $descr = git_get_project_description($project) || "none";
6289        my %co = parse_commit("HEAD");
6290        my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6291        my $head = $co{'id'};
6292        my $remote_heads = gitweb_check_feature('remote_heads');
6293
6294        my $owner = git_get_project_owner($project);
6295
6296        my $refs = git_get_references();
6297        # These get_*_list functions return one more to allow us to see if
6298        # there are more ...
6299        my @taglist  = git_get_tags_list(16);
6300        my @headlist = git_get_heads_list(16);
6301        my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6302        my @forklist;
6303        my $check_forks = gitweb_check_feature('forks');
6304
6305        if ($check_forks) {
6306                # find forks of a project
6307                my $filter = $project;
6308                $filter =~ s/\.git$//;
6309                @forklist = git_get_projects_list($filter);
6310                # filter out forks of forks
6311                @forklist = filter_forks_from_projects_list(\@forklist)
6312                        if (@forklist);
6313        }
6314
6315        git_header_html();
6316        git_print_page_nav('summary','', $head);
6317
6318        print "<div class=\"title\">&nbsp;</div>\n";
6319        print "<table class=\"projects_list\">\n" .
6320              "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
6321              "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6322        if (defined $cd{'rfc2822'}) {
6323                print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6324                      "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6325        }
6326
6327        # use per project git URL list in $projectroot/$project/cloneurl
6328        # or make project git URL from git base URL and project name
6329        my $url_tag = "URL";
6330        my @url_list = git_get_project_url_list($project);
6331        @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6332        foreach my $git_url (@url_list) {
6333                next unless $git_url;
6334                print format_repo_url($url_tag, $git_url);
6335                $url_tag = "";
6336        }
6337
6338        # Tag cloud
6339        my $show_ctags = gitweb_check_feature('ctags');
6340        if ($show_ctags) {
6341                my $ctags = git_get_project_ctags($project);
6342                if (%$ctags) {
6343                        # without ability to add tags, don't show if there are none
6344                        my $cloud = git_populate_project_tagcloud($ctags);
6345                        print "<tr id=\"metadata_ctags\">" .
6346                              "<td>content tags</td>" .
6347                              "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6348                              "</tr>\n";
6349                }
6350        }
6351
6352        print "</table>\n";
6353
6354        # If XSS prevention is on, we don't include README.html.
6355        # TODO: Allow a readme in some safe format.
6356        if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6357                print "<div class=\"title\">readme</div>\n" .
6358                      "<div class=\"readme\">\n";
6359                insert_file("$projectroot/$project/README.html");
6360                print "\n</div>\n"; # class="readme"
6361        }
6362
6363        # we need to request one more than 16 (0..15) to check if
6364        # those 16 are all
6365        my @commitlist = $head ? parse_commits($head, 17) : ();
6366        if (@commitlist) {
6367                git_print_header_div('shortlog');
6368                git_shortlog_body(\@commitlist, 0, 15, $refs,
6369                                  $#commitlist <=  15 ? undef :
6370                                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
6371        }
6372
6373        if (@taglist) {
6374                git_print_header_div('tags');
6375                git_tags_body(\@taglist, 0, 15,
6376                              $#taglist <=  15 ? undef :
6377                              $cgi->a({-href => href(action=>"tags")}, "..."));
6378        }
6379
6380        if (@headlist) {
6381                git_print_header_div('heads');
6382                git_heads_body(\@headlist, $head, 0, 15,
6383                               $#headlist <= 15 ? undef :
6384                               $cgi->a({-href => href(action=>"heads")}, "..."));
6385        }
6386
6387        if (%remotedata) {
6388                git_print_header_div('remotes');
6389                git_remotes_body(\%remotedata, 15, $head);
6390        }
6391
6392        if (@forklist) {
6393                git_print_header_div('forks');
6394                git_project_list_body(\@forklist, 'age', 0, 15,
6395                                      $#forklist <= 15 ? undef :
6396                                      $cgi->a({-href => href(action=>"forks")}, "..."),
6397                                      'no_header');
6398        }
6399
6400        git_footer_html();
6401}
6402
6403sub git_tag {
6404        my %tag = parse_tag($hash);
6405
6406        if (! %tag) {
6407                die_error(404, "Unknown tag object");
6408        }
6409
6410        my $head = git_get_head_hash($project);
6411        git_header_html();
6412        git_print_page_nav('','', $head,undef,$head);
6413        git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6414        print "<div class=\"title_text\">\n" .
6415              "<table class=\"object_header\">\n" .
6416              "<tr>\n" .
6417              "<td>object</td>\n" .
6418              "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6419                               $tag{'object'}) . "</td>\n" .
6420              "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6421                                              $tag{'type'}) . "</td>\n" .
6422              "</tr>\n";
6423        if (defined($tag{'author'})) {
6424                git_print_authorship_rows(\%tag, 'author');
6425        }
6426        print "</table>\n\n" .
6427              "</div>\n";
6428        print "<div class=\"page_body\">";
6429        my $comment = $tag{'comment'};
6430        foreach my $line (@$comment) {
6431                chomp $line;
6432                print esc_html($line, -nbsp=>1) . "<br/>\n";
6433        }
6434        print "</div>\n";
6435        git_footer_html();
6436}
6437
6438sub git_blame_common {
6439        my $format = shift || 'porcelain';
6440        if ($format eq 'porcelain' && $input_params{'javascript'}) {
6441                $format = 'incremental';
6442                $action = 'blame_incremental'; # for page title etc
6443        }
6444
6445        # permissions
6446        gitweb_check_feature('blame')
6447                or die_error(403, "Blame view not allowed");
6448
6449        # error checking
6450        die_error(400, "No file name given") unless $file_name;
6451        $hash_base ||= git_get_head_hash($project);
6452        die_error(404, "Couldn't find base commit") unless $hash_base;
6453        my %co = parse_commit($hash_base)
6454                or die_error(404, "Commit not found");
6455        my $ftype = "blob";
6456        if (!defined $hash) {
6457                $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6458                        or die_error(404, "Error looking up file");
6459        } else {
6460                $ftype = git_get_type($hash);
6461                if ($ftype !~ "blob") {
6462                        die_error(400, "Object is not a blob");
6463                }
6464        }
6465
6466        my $fd;
6467        if ($format eq 'incremental') {
6468                # get file contents (as base)
6469                open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6470                        or die_error(500, "Open git-cat-file failed");
6471        } elsif ($format eq 'data') {
6472                # run git-blame --incremental
6473                open $fd, "-|", git_cmd(), "blame", "--incremental",
6474                        $hash_base, "--", $file_name
6475                        or die_error(500, "Open git-blame --incremental failed");
6476        } else {
6477                # run git-blame --porcelain
6478                open $fd, "-|", git_cmd(), "blame", '-p',
6479                        $hash_base, '--', $file_name
6480                        or die_error(500, "Open git-blame --porcelain failed");
6481        }
6482
6483        # incremental blame data returns early
6484        if ($format eq 'data') {
6485                print $cgi->header(
6486                        -type=>"text/plain", -charset => "utf-8",
6487                        -status=> "200 OK");
6488                local $| = 1; # output autoflush
6489                while (my $line = <$fd>) {
6490                        print to_utf8($line);
6491                }
6492                close $fd
6493                        or print "ERROR $!\n";
6494
6495                print 'END';
6496                if (defined $t0 && gitweb_check_feature('timed')) {
6497                        print ' '.
6498                              tv_interval($t0, [ gettimeofday() ]).
6499                              ' '.$number_of_git_cmds;
6500                }
6501                print "\n";
6502
6503                return;
6504        }
6505
6506        # page header
6507        git_header_html();
6508        my $formats_nav =
6509                $cgi->a({-href => href(action=>"blob", -replay=>1)},
6510                        "blob") .
6511                " | ";
6512        if ($format eq 'incremental') {
6513                $formats_nav .=
6514                        $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6515                                "blame") . " (non-incremental)";
6516        } else {
6517                $formats_nav .=
6518                        $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6519                                "blame") . " (incremental)";
6520        }
6521        $formats_nav .=
6522                " | " .
6523                $cgi->a({-href => href(action=>"history", -replay=>1)},
6524                        "history") .
6525                " | " .
6526                $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6527                        "HEAD");
6528        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6529        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6530        git_print_page_path($file_name, $ftype, $hash_base);
6531
6532        # page body
6533        if ($format eq 'incremental') {
6534                print "<noscript>\n<div class=\"error\"><center><b>\n".
6535                      "This page requires JavaScript to run.\n Use ".
6536                      $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6537                              'this page').
6538                      " instead.\n".
6539                      "</b></center></div>\n</noscript>\n";
6540
6541                print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6542        }
6543
6544        print qq!<div class="page_body">\n!;
6545        print qq!<div id="progress_info">... / ...</div>\n!
6546                if ($format eq 'incremental');
6547        print qq!<table id="blame_table" class="blame" width="100%">\n!.
6548              #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6549              qq!<thead>\n!.
6550              qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6551              qq!</thead>\n!.
6552              qq!<tbody>\n!;
6553
6554        my @rev_color = qw(light dark);
6555        my $num_colors = scalar(@rev_color);
6556        my $current_color = 0;
6557
6558        if ($format eq 'incremental') {
6559                my $color_class = $rev_color[$current_color];
6560
6561                #contents of a file
6562                my $linenr = 0;
6563        LINE:
6564                while (my $line = <$fd>) {
6565                        chomp $line;
6566                        $linenr++;
6567
6568                        print qq!<tr id="l$linenr" class="$color_class">!.
6569                              qq!<td class="sha1"><a href=""> </a></td>!.
6570                              qq!<td class="linenr">!.
6571                              qq!<a class="linenr" href="">$linenr</a></td>!;
6572                        print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6573                        print qq!</tr>\n!;
6574                }
6575
6576        } else { # porcelain, i.e. ordinary blame
6577                my %metainfo = (); # saves information about commits
6578
6579                # blame data
6580        LINE:
6581                while (my $line = <$fd>) {
6582                        chomp $line;
6583                        # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6584                        # no <lines in group> for subsequent lines in group of lines
6585                        my ($full_rev, $orig_lineno, $lineno, $group_size) =
6586                           ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6587                        if (!exists $metainfo{$full_rev}) {
6588                                $metainfo{$full_rev} = { 'nprevious' => 0 };
6589                        }
6590                        my $meta = $metainfo{$full_rev};
6591                        my $data;
6592                        while ($data = <$fd>) {
6593                                chomp $data;
6594                                last if ($data =~ s/^\t//); # contents of line
6595                                if ($data =~ /^(\S+)(?: (.*))?$/) {
6596                                        $meta->{$1} = $2 unless exists $meta->{$1};
6597                                }
6598                                if ($data =~ /^previous /) {
6599                                        $meta->{'nprevious'}++;
6600                                }
6601                        }
6602                        my $short_rev = substr($full_rev, 0, 8);
6603                        my $author = $meta->{'author'};
6604                        my %date =
6605                                parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6606                        my $date = $date{'iso-tz'};
6607                        if ($group_size) {
6608                                $current_color = ($current_color + 1) % $num_colors;
6609                        }
6610                        my $tr_class = $rev_color[$current_color];
6611                        $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6612                        $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6613                        $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6614                        print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6615                        if ($group_size) {
6616                                print "<td class=\"sha1\"";
6617                                print " title=\"". esc_html($author) . ", $date\"";
6618                                print " rowspan=\"$group_size\"" if ($group_size > 1);
6619                                print ">";
6620                                print $cgi->a({-href => href(action=>"commit",
6621                                                             hash=>$full_rev,
6622                                                             file_name=>$file_name)},
6623                                              esc_html($short_rev));
6624                                if ($group_size >= 2) {
6625                                        my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6626                                        if (@author_initials) {
6627                                                print "<br />" .
6628                                                      esc_html(join('', @author_initials));
6629                                                #           or join('.', ...)
6630                                        }
6631                                }
6632                                print "</td>\n";
6633                        }
6634                        # 'previous' <sha1 of parent commit> <filename at commit>
6635                        if (exists $meta->{'previous'} &&
6636                            $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6637                                $meta->{'parent'} = $1;
6638                                $meta->{'file_parent'} = unquote($2);
6639                        }
6640                        my $linenr_commit =
6641                                exists($meta->{'parent'}) ?
6642                                $meta->{'parent'} : $full_rev;
6643                        my $linenr_filename =
6644                                exists($meta->{'file_parent'}) ?
6645                                $meta->{'file_parent'} : unquote($meta->{'filename'});
6646                        my $blamed = href(action => 'blame',
6647                                          file_name => $linenr_filename,
6648                                          hash_base => $linenr_commit);
6649                        print "<td class=\"linenr\">";
6650                        print $cgi->a({ -href => "$blamed#l$orig_lineno",
6651                                        -class => "linenr" },
6652                                      esc_html($lineno));
6653                        print "</td>";
6654                        print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6655                        print "</tr>\n";
6656                } # end while
6657
6658        }
6659
6660        # footer
6661        print "</tbody>\n".
6662              "</table>\n"; # class="blame"
6663        print "</div>\n";   # class="blame_body"
6664        close $fd
6665                or print "Reading blob failed\n";
6666
6667        git_footer_html();
6668}
6669
6670sub git_blame {
6671        git_blame_common();
6672}
6673
6674sub git_blame_incremental {
6675        git_blame_common('incremental');
6676}
6677
6678sub git_blame_data {
6679        git_blame_common('data');
6680}
6681
6682sub git_tags {
6683        my $head = git_get_head_hash($project);
6684        git_header_html();
6685        git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6686        git_print_header_div('summary', $project);
6687
6688        my @tagslist = git_get_tags_list();
6689        if (@tagslist) {
6690                git_tags_body(\@tagslist);
6691        }
6692        git_footer_html();
6693}
6694
6695sub git_heads {
6696        my $head = git_get_head_hash($project);
6697        git_header_html();
6698        git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6699        git_print_header_div('summary', $project);
6700
6701        my @headslist = git_get_heads_list();
6702        if (@headslist) {
6703                git_heads_body(\@headslist, $head);
6704        }
6705        git_footer_html();
6706}
6707
6708# used both for single remote view and for list of all the remotes
6709sub git_remotes {
6710        gitweb_check_feature('remote_heads')
6711                or die_error(403, "Remote heads view is disabled");
6712
6713        my $head = git_get_head_hash($project);
6714        my $remote = $input_params{'hash'};
6715
6716        my $remotedata = git_get_remotes_list($remote);
6717        die_error(500, "Unable to get remote information") unless defined $remotedata;
6718
6719        unless (%$remotedata) {
6720                die_error(404, defined $remote ?
6721                        "Remote $remote not found" :
6722                        "No remotes found");
6723        }
6724
6725        git_header_html(undef, undef, -action_extra => $remote);
6726        git_print_page_nav('', '',  $head, undef, $head,
6727                format_ref_views($remote ? '' : 'remotes'));
6728
6729        fill_remote_heads($remotedata);
6730        if (defined $remote) {
6731                git_print_header_div('remotes', "$remote remote for $project");
6732                git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6733        } else {
6734                git_print_header_div('summary', "$project remotes");
6735                git_remotes_body($remotedata, undef, $head);
6736        }
6737
6738        git_footer_html();
6739}
6740
6741sub git_blob_plain {
6742        my $type = shift;
6743        my $expires;
6744
6745        if (!defined $hash) {
6746                if (defined $file_name) {
6747                        my $base = $hash_base || git_get_head_hash($project);
6748                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6749                                or die_error(404, "Cannot find file");
6750                } else {
6751                        die_error(400, "No file name defined");
6752                }
6753        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6754                # blobs defined by non-textual hash id's can be cached
6755                $expires = "+1d";
6756        }
6757
6758        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6759                or die_error(500, "Open git-cat-file blob '$hash' failed");
6760
6761        # content-type (can include charset)
6762        $type = blob_contenttype($fd, $file_name, $type);
6763
6764        # "save as" filename, even when no $file_name is given
6765        my $save_as = "$hash";
6766        if (defined $file_name) {
6767                $save_as = $file_name;
6768        } elsif ($type =~ m/^text\//) {
6769                $save_as .= '.txt';
6770        }
6771
6772        # With XSS prevention on, blobs of all types except a few known safe
6773        # ones are served with "Content-Disposition: attachment" to make sure
6774        # they don't run in our security domain.  For certain image types,
6775        # blob view writes an <img> tag referring to blob_plain view, and we
6776        # want to be sure not to break that by serving the image as an
6777        # attachment (though Firefox 3 doesn't seem to care).
6778        my $sandbox = $prevent_xss &&
6779                $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6780
6781        # serve text/* as text/plain
6782        if ($prevent_xss &&
6783            ($type =~ m!^text/[a-z]+\b(.*)$! ||
6784             ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6785                my $rest = $1;
6786                $rest = defined $rest ? $rest : '';
6787                $type = "text/plain$rest";
6788        }
6789
6790        print $cgi->header(
6791                -type => $type,
6792                -expires => $expires,
6793                -content_disposition =>
6794                        ($sandbox ? 'attachment' : 'inline')
6795                        . '; filename="' . $save_as . '"');
6796        local $/ = undef;
6797        binmode STDOUT, ':raw';
6798        print <$fd>;
6799        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6800        close $fd;
6801}
6802
6803sub git_blob {
6804        my $expires;
6805
6806        if (!defined $hash) {
6807                if (defined $file_name) {
6808                        my $base = $hash_base || git_get_head_hash($project);
6809                        $hash = git_get_hash_by_path($base, $file_name, "blob")
6810                                or die_error(404, "Cannot find file");
6811                } else {
6812                        die_error(400, "No file name defined");
6813                }
6814        } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6815                # blobs defined by non-textual hash id's can be cached
6816                $expires = "+1d";
6817        }
6818
6819        my $have_blame = gitweb_check_feature('blame');
6820        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6821                or die_error(500, "Couldn't cat $file_name, $hash");
6822        my $mimetype = blob_mimetype($fd, $file_name);
6823        # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6824        if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6825                close $fd;
6826                return git_blob_plain($mimetype);
6827        }
6828        # we can have blame only for text/* mimetype
6829        $have_blame &&= ($mimetype =~ m!^text/!);
6830
6831        my $highlight = gitweb_check_feature('highlight');
6832        my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6833        $fd = run_highlighter($fd, $highlight, $syntax)
6834                if $syntax;
6835
6836        git_header_html(undef, $expires);
6837        my $formats_nav = '';
6838        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6839                if (defined $file_name) {
6840                        if ($have_blame) {
6841                                $formats_nav .=
6842                                        $cgi->a({-href => href(action=>"blame", -replay=>1)},
6843                                                "blame") .
6844                                        " | ";
6845                        }
6846                        $formats_nav .=
6847                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6848                                        "history") .
6849                                " | " .
6850                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6851                                        "raw") .
6852                                " | " .
6853                                $cgi->a({-href => href(action=>"blob",
6854                                                       hash_base=>"HEAD", file_name=>$file_name)},
6855                                        "HEAD");
6856                } else {
6857                        $formats_nav .=
6858                                $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6859                                        "raw");
6860                }
6861                git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6862                git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6863        } else {
6864                print "<div class=\"page_nav\">\n" .
6865                      "<br/><br/></div>\n" .
6866                      "<div class=\"title\">".esc_html($hash)."</div>\n";
6867        }
6868        git_print_page_path($file_name, "blob", $hash_base);
6869        print "<div class=\"page_body\">\n";
6870        if ($mimetype =~ m!^image/!) {
6871                print qq!<img type="!.esc_attr($mimetype).qq!"!;
6872                if ($file_name) {
6873                        print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
6874                }
6875                print qq! src="! .
6876                      href(action=>"blob_plain", hash=>$hash,
6877                           hash_base=>$hash_base, file_name=>$file_name) .
6878                      qq!" />\n!;
6879        } else {
6880                my $nr;
6881                while (my $line = <$fd>) {
6882                        chomp $line;
6883                        $nr++;
6884                        $line = untabify($line);
6885                        printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6886                               $nr, esc_attr(href(-replay => 1)), $nr, $nr,
6887                               $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
6888                }
6889        }
6890        close $fd
6891                or print "Reading blob failed.\n";
6892        print "</div>";
6893        git_footer_html();
6894}
6895
6896sub git_tree {
6897        if (!defined $hash_base) {
6898                $hash_base = "HEAD";
6899        }
6900        if (!defined $hash) {
6901                if (defined $file_name) {
6902                        $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6903                } else {
6904                        $hash = $hash_base;
6905                }
6906        }
6907        die_error(404, "No such tree") unless defined($hash);
6908
6909        my $show_sizes = gitweb_check_feature('show-sizes');
6910        my $have_blame = gitweb_check_feature('blame');
6911
6912        my @entries = ();
6913        {
6914                local $/ = "\0";
6915                open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6916                        ($show_sizes ? '-l' : ()), @extra_options, $hash
6917                        or die_error(500, "Open git-ls-tree failed");
6918                @entries = map { chomp; $_ } <$fd>;
6919                close $fd
6920                        or die_error(404, "Reading tree failed");
6921        }
6922
6923        my $refs = git_get_references();
6924        my $ref = format_ref_marker($refs, $hash_base);
6925        git_header_html();
6926        my $basedir = '';
6927        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6928                my @views_nav = ();
6929                if (defined $file_name) {
6930                        push @views_nav,
6931                                $cgi->a({-href => href(action=>"history", -replay=>1)},
6932                                        "history"),
6933                                $cgi->a({-href => href(action=>"tree",
6934                                                       hash_base=>"HEAD", file_name=>$file_name)},
6935                                        "HEAD"),
6936                }
6937                my $snapshot_links = format_snapshot_links($hash);
6938                if (defined $snapshot_links) {
6939                        # FIXME: Should be available when we have no hash base as well.
6940                        push @views_nav, $snapshot_links;
6941                }
6942                git_print_page_nav('tree','', $hash_base, undef, undef,
6943                                   join(' | ', @views_nav));
6944                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6945        } else {
6946                undef $hash_base;
6947                print "<div class=\"page_nav\">\n";
6948                print "<br/><br/></div>\n";
6949                print "<div class=\"title\">".esc_html($hash)."</div>\n";
6950        }
6951        if (defined $file_name) {
6952                $basedir = $file_name;
6953                if ($basedir ne '' && substr($basedir, -1) ne '/') {
6954                        $basedir .= '/';
6955                }
6956                git_print_page_path($file_name, 'tree', $hash_base);
6957        }
6958        print "<div class=\"page_body\">\n";
6959        print "<table class=\"tree\">\n";
6960        my $alternate = 1;
6961        # '..' (top directory) link if possible
6962        if (defined $hash_base &&
6963            defined $file_name && $file_name =~ m![^/]+$!) {
6964                if ($alternate) {
6965                        print "<tr class=\"dark\">\n";
6966                } else {
6967                        print "<tr class=\"light\">\n";
6968                }
6969                $alternate ^= 1;
6970
6971                my $up = $file_name;
6972                $up =~ s!/?[^/]+$!!;
6973                undef $up unless $up;
6974                # based on git_print_tree_entry
6975                print '<td class="mode">' . mode_str('040000') . "</td>\n";
6976                print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6977                print '<td class="list">';
6978                print $cgi->a({-href => href(action=>"tree",
6979                                             hash_base=>$hash_base,
6980                                             file_name=>$up)},
6981                              "..");
6982                print "</td>\n";
6983                print "<td class=\"link\"></td>\n";
6984
6985                print "</tr>\n";
6986        }
6987        foreach my $line (@entries) {
6988                my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6989
6990                if ($alternate) {
6991                        print "<tr class=\"dark\">\n";
6992                } else {
6993                        print "<tr class=\"light\">\n";
6994                }
6995                $alternate ^= 1;
6996
6997                git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6998
6999                print "</tr>\n";
7000        }
7001        print "</table>\n" .
7002              "</div>";
7003        git_footer_html();
7004}
7005
7006sub snapshot_name {
7007        my ($project, $hash) = @_;
7008
7009        # path/to/project.git  -> project
7010        # path/to/project/.git -> project
7011        my $name = to_utf8($project);
7012        $name =~ s,([^/])/*\.git$,$1,;
7013        $name = basename($name);
7014        # sanitize name
7015        $name =~ s/[[:cntrl:]]/?/g;
7016
7017        my $ver = $hash;
7018        if ($hash =~ /^[0-9a-fA-F]+$/) {
7019                # shorten SHA-1 hash
7020                my $full_hash = git_get_full_hash($project, $hash);
7021                if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7022                        $ver = git_get_short_hash($project, $hash);
7023                }
7024        } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7025                # tags don't need shortened SHA-1 hash
7026                $ver = $1;
7027        } else {
7028                # branches and other need shortened SHA-1 hash
7029                if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7030                        $ver = $1;
7031                }
7032                $ver .= '-' . git_get_short_hash($project, $hash);
7033        }
7034        # in case of hierarchical branch names
7035        $ver =~ s!/!.!g;
7036
7037        # name = project-version_string
7038        $name = "$name-$ver";
7039
7040        return wantarray ? ($name, $name) : $name;
7041}
7042
7043sub git_snapshot {
7044        my $format = $input_params{'snapshot_format'};
7045        if (!@snapshot_fmts) {
7046                die_error(403, "Snapshots not allowed");
7047        }
7048        # default to first supported snapshot format
7049        $format ||= $snapshot_fmts[0];
7050        if ($format !~ m/^[a-z0-9]+$/) {
7051                die_error(400, "Invalid snapshot format parameter");
7052        } elsif (!exists($known_snapshot_formats{$format})) {
7053                die_error(400, "Unknown snapshot format");
7054        } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7055                die_error(403, "Snapshot format not allowed");
7056        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7057                die_error(403, "Unsupported snapshot format");
7058        }
7059
7060        my $type = git_get_type("$hash^{}");
7061        if (!$type) {
7062                die_error(404, 'Object does not exist');
7063        }  elsif ($type eq 'blob') {
7064                die_error(400, 'Object is not a tree-ish');
7065        }
7066
7067        my ($name, $prefix) = snapshot_name($project, $hash);
7068        my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7069        my $cmd = quote_command(
7070                git_cmd(), 'archive',
7071                "--format=$known_snapshot_formats{$format}{'format'}",
7072                "--prefix=$prefix/", $hash);
7073        if (exists $known_snapshot_formats{$format}{'compressor'}) {
7074                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7075        }
7076
7077        $filename =~ s/(["\\])/\\$1/g;
7078        print $cgi->header(
7079                -type => $known_snapshot_formats{$format}{'type'},
7080                -content_disposition => 'inline; filename="' . $filename . '"',
7081                -status => '200 OK');
7082
7083        open my $fd, "-|", $cmd
7084                or die_error(500, "Execute git-archive failed");
7085        binmode STDOUT, ':raw';
7086        print <$fd>;
7087        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7088        close $fd;
7089}
7090
7091sub git_log_generic {
7092        my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7093
7094        my $head = git_get_head_hash($project);
7095        if (!defined $base) {
7096                $base = $head;
7097        }
7098        if (!defined $page) {
7099                $page = 0;
7100        }
7101        my $refs = git_get_references();
7102
7103        my $commit_hash = $base;
7104        if (defined $parent) {
7105                $commit_hash = "$parent..$base";
7106        }
7107        my @commitlist =
7108                parse_commits($commit_hash, 101, (100 * $page),
7109                              defined $file_name ? ($file_name, "--full-history") : ());
7110
7111        my $ftype;
7112        if (!defined $file_hash && defined $file_name) {
7113                # some commits could have deleted file in question,
7114                # and not have it in tree, but one of them has to have it
7115                for (my $i = 0; $i < @commitlist; $i++) {
7116                        $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7117                        last if defined $file_hash;
7118                }
7119        }
7120        if (defined $file_hash) {
7121                $ftype = git_get_type($file_hash);
7122        }
7123        if (defined $file_name && !defined $ftype) {
7124                die_error(500, "Unknown type of object");
7125        }
7126        my %co;
7127        if (defined $file_name) {
7128                %co = parse_commit($base)
7129                        or die_error(404, "Unknown commit object");
7130        }
7131
7132
7133        my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7134        my $next_link = '';
7135        if ($#commitlist >= 100) {
7136                $next_link =
7137                        $cgi->a({-href => href(-replay=>1, page=>$page+1),
7138                                 -accesskey => "n", -title => "Alt-n"}, "next");
7139        }
7140        my $patch_max = gitweb_get_feature('patches');
7141        if ($patch_max && !defined $file_name) {
7142                if ($patch_max < 0 || @commitlist <= $patch_max) {
7143                        $paging_nav .= " &sdot; " .
7144                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
7145                                        "patches");
7146                }
7147        }
7148
7149        git_header_html();
7150        git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7151        if (defined $file_name) {
7152                git_print_header_div('commit', esc_html($co{'title'}), $base);
7153        } else {
7154                git_print_header_div('summary', $project)
7155        }
7156        git_print_page_path($file_name, $ftype, $hash_base)
7157                if (defined $file_name);
7158
7159        $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7160                     $file_name, $file_hash, $ftype);
7161
7162        git_footer_html();
7163}
7164
7165sub git_log {
7166        git_log_generic('log', \&git_log_body,
7167                        $hash, $hash_parent);
7168}
7169
7170sub git_commit {
7171        $hash ||= $hash_base || "HEAD";
7172        my %co = parse_commit($hash)
7173            or die_error(404, "Unknown commit object");
7174
7175        my $parent  = $co{'parent'};
7176        my $parents = $co{'parents'}; # listref
7177
7178        # we need to prepare $formats_nav before any parameter munging
7179        my $formats_nav;
7180        if (!defined $parent) {
7181                # --root commitdiff
7182                $formats_nav .= '(initial)';
7183        } elsif (@$parents == 1) {
7184                # single parent commit
7185                $formats_nav .=
7186                        '(parent: ' .
7187                        $cgi->a({-href => href(action=>"commit",
7188                                               hash=>$parent)},
7189                                esc_html(substr($parent, 0, 7))) .
7190                        ')';
7191        } else {
7192                # merge commit
7193                $formats_nav .=
7194                        '(merge: ' .
7195                        join(' ', map {
7196                                $cgi->a({-href => href(action=>"commit",
7197                                                       hash=>$_)},
7198                                        esc_html(substr($_, 0, 7)));
7199                        } @$parents ) .
7200                        ')';
7201        }
7202        if (gitweb_check_feature('patches') && @$parents <= 1) {
7203                $formats_nav .= " | " .
7204                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
7205                                "patch");
7206        }
7207
7208        if (!defined $parent) {
7209                $parent = "--root";
7210        }
7211        my @difftree;
7212        open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7213                @diff_opts,
7214                (@$parents <= 1 ? $parent : '-c'),
7215                $hash, "--"
7216                or die_error(500, "Open git-diff-tree failed");
7217        @difftree = map { chomp; $_ } <$fd>;
7218        close $fd or die_error(404, "Reading git-diff-tree failed");
7219
7220        # non-textual hash id's can be cached
7221        my $expires;
7222        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7223                $expires = "+1d";
7224        }
7225        my $refs = git_get_references();
7226        my $ref = format_ref_marker($refs, $co{'id'});
7227
7228        git_header_html(undef, $expires);
7229        git_print_page_nav('commit', '',
7230                           $hash, $co{'tree'}, $hash,
7231                           $formats_nav);
7232
7233        if (defined $co{'parent'}) {
7234                git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7235        } else {
7236                git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7237        }
7238        print "<div class=\"title_text\">\n" .
7239              "<table class=\"object_header\">\n";
7240        git_print_authorship_rows(\%co);
7241        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7242        print "<tr>" .
7243              "<td>tree</td>" .
7244              "<td class=\"sha1\">" .
7245              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7246                       class => "list"}, $co{'tree'}) .
7247              "</td>" .
7248              "<td class=\"link\">" .
7249              $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7250                      "tree");
7251        my $snapshot_links = format_snapshot_links($hash);
7252        if (defined $snapshot_links) {
7253                print " | " . $snapshot_links;
7254        }
7255        print "</td>" .
7256              "</tr>\n";
7257
7258        foreach my $par (@$parents) {
7259                print "<tr>" .
7260                      "<td>parent</td>" .
7261                      "<td class=\"sha1\">" .
7262                      $cgi->a({-href => href(action=>"commit", hash=>$par),
7263                               class => "list"}, $par) .
7264                      "</td>" .
7265                      "<td class=\"link\">" .
7266                      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7267                      " | " .
7268                      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7269                      "</td>" .
7270                      "</tr>\n";
7271        }
7272        print "</table>".
7273              "</div>\n";
7274
7275        print "<div class=\"page_body\">\n";
7276        git_print_log($co{'comment'});
7277        print "</div>\n";
7278
7279        git_difftree_body(\@difftree, $hash, @$parents);
7280
7281        git_footer_html();
7282}
7283
7284sub git_object {
7285        # object is defined by:
7286        # - hash or hash_base alone
7287        # - hash_base and file_name
7288        my $type;
7289
7290        # - hash or hash_base alone
7291        if ($hash || ($hash_base && !defined $file_name)) {
7292                my $object_id = $hash || $hash_base;
7293
7294                open my $fd, "-|", quote_command(
7295                        git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7296                        or die_error(404, "Object does not exist");
7297                $type = <$fd>;
7298                chomp $type;
7299                close $fd
7300                        or die_error(404, "Object does not exist");
7301
7302        # - hash_base and file_name
7303        } elsif ($hash_base && defined $file_name) {
7304                $file_name =~ s,/+$,,;
7305
7306                system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7307                        or die_error(404, "Base object does not exist");
7308
7309                # here errors should not hapen
7310                open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7311                        or die_error(500, "Open git-ls-tree failed");
7312                my $line = <$fd>;
7313                close $fd;
7314
7315                #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7316                unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7317                        die_error(404, "File or directory for given base does not exist");
7318                }
7319                $type = $2;
7320                $hash = $3;
7321        } else {
7322                die_error(400, "Not enough information to find object");
7323        }
7324
7325        print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7326                                          hash=>$hash, hash_base=>$hash_base,
7327                                          file_name=>$file_name),
7328                             -status => '302 Found');
7329}
7330
7331sub git_blobdiff {
7332        my $format = shift || 'html';
7333        my $diff_style = $input_params{'diff_style'} || 'inline';
7334
7335        my $fd;
7336        my @difftree;
7337        my %diffinfo;
7338        my $expires;
7339
7340        # preparing $fd and %diffinfo for git_patchset_body
7341        # new style URI
7342        if (defined $hash_base && defined $hash_parent_base) {
7343                if (defined $file_name) {
7344                        # read raw output
7345                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7346                                $hash_parent_base, $hash_base,
7347                                "--", (defined $file_parent ? $file_parent : ()), $file_name
7348                                or die_error(500, "Open git-diff-tree failed");
7349                        @difftree = map { chomp; $_ } <$fd>;
7350                        close $fd
7351                                or die_error(404, "Reading git-diff-tree failed");
7352                        @difftree
7353                                or die_error(404, "Blob diff not found");
7354
7355                } elsif (defined $hash &&
7356                         $hash =~ /[0-9a-fA-F]{40}/) {
7357                        # try to find filename from $hash
7358
7359                        # read filtered raw output
7360                        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7361                                $hash_parent_base, $hash_base, "--"
7362                                or die_error(500, "Open git-diff-tree failed");
7363                        @difftree =
7364                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7365                                # $hash == to_id
7366                                grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7367                                map { chomp; $_ } <$fd>;
7368                        close $fd
7369                                or die_error(404, "Reading git-diff-tree failed");
7370                        @difftree
7371                                or die_error(404, "Blob diff not found");
7372
7373                } else {
7374                        die_error(400, "Missing one of the blob diff parameters");
7375                }
7376
7377                if (@difftree > 1) {
7378                        die_error(400, "Ambiguous blob diff specification");
7379                }
7380
7381                %diffinfo = parse_difftree_raw_line($difftree[0]);
7382                $file_parent ||= $diffinfo{'from_file'} || $file_name;
7383                $file_name   ||= $diffinfo{'to_file'};
7384
7385                $hash_parent ||= $diffinfo{'from_id'};
7386                $hash        ||= $diffinfo{'to_id'};
7387
7388                # non-textual hash id's can be cached
7389                if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7390                    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7391                        $expires = '+1d';
7392                }
7393
7394                # open patch output
7395                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7396                        '-p', ($format eq 'html' ? "--full-index" : ()),
7397                        $hash_parent_base, $hash_base,
7398                        "--", (defined $file_parent ? $file_parent : ()), $file_name
7399                        or die_error(500, "Open git-diff-tree failed");
7400        }
7401
7402        # old/legacy style URI -- not generated anymore since 1.4.3.
7403        if (!%diffinfo) {
7404                die_error('404 Not Found', "Missing one of the blob diff parameters")
7405        }
7406
7407        # header
7408        if ($format eq 'html') {
7409                my $formats_nav =
7410                        $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7411                                "raw");
7412                $formats_nav .= diff_style_nav($diff_style);
7413                git_header_html(undef, $expires);
7414                if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7415                        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7416                        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7417                } else {
7418                        print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7419                        print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7420                }
7421                if (defined $file_name) {
7422                        git_print_page_path($file_name, "blob", $hash_base);
7423                } else {
7424                        print "<div class=\"page_path\"></div>\n";
7425                }
7426
7427        } elsif ($format eq 'plain') {
7428                print $cgi->header(
7429                        -type => 'text/plain',
7430                        -charset => 'utf-8',
7431                        -expires => $expires,
7432                        -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7433
7434                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7435
7436        } else {
7437                die_error(400, "Unknown blobdiff format");
7438        }
7439
7440        # patch
7441        if ($format eq 'html') {
7442                print "<div class=\"page_body\">\n";
7443
7444                git_patchset_body($fd, $diff_style,
7445                                  [ \%diffinfo ], $hash_base, $hash_parent_base);
7446                close $fd;
7447
7448                print "</div>\n"; # class="page_body"
7449                git_footer_html();
7450
7451        } else {
7452                while (my $line = <$fd>) {
7453                        $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7454                        $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7455
7456                        print $line;
7457
7458                        last if $line =~ m!^\+\+\+!;
7459                }
7460                local $/ = undef;
7461                print <$fd>;
7462                close $fd;
7463        }
7464}
7465
7466sub git_blobdiff_plain {
7467        git_blobdiff('plain');
7468}
7469
7470# assumes that it is added as later part of already existing navigation,
7471# so it returns "| foo | bar" rather than just "foo | bar"
7472sub diff_style_nav {
7473        my ($diff_style, $is_combined) = @_;
7474        $diff_style ||= 'inline';
7475
7476        return "" if ($is_combined);
7477
7478        my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7479        my %styles = @styles;
7480        @styles =
7481                @styles[ map { $_ * 2 } 0..$#styles/2 ];
7482
7483        return join '',
7484                map { " | ".$_ }
7485                map {
7486                        $_ eq $diff_style ? $styles{$_} :
7487                        $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7488                } @styles;
7489}
7490
7491sub git_commitdiff {
7492        my %params = @_;
7493        my $format = $params{-format} || 'html';
7494        my $diff_style = $input_params{'diff_style'} || 'inline';
7495
7496        my ($patch_max) = gitweb_get_feature('patches');
7497        if ($format eq 'patch') {
7498                die_error(403, "Patch view not allowed") unless $patch_max;
7499        }
7500
7501        $hash ||= $hash_base || "HEAD";
7502        my %co = parse_commit($hash)
7503            or die_error(404, "Unknown commit object");
7504
7505        # choose format for commitdiff for merge
7506        if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7507                $hash_parent = '--cc';
7508        }
7509        # we need to prepare $formats_nav before almost any parameter munging
7510        my $formats_nav;
7511        if ($format eq 'html') {
7512                $formats_nav =
7513                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7514                                "raw");
7515                if ($patch_max && @{$co{'parents'}} <= 1) {
7516                        $formats_nav .= " | " .
7517                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
7518                                        "patch");
7519                }
7520                $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7521
7522                if (defined $hash_parent &&
7523                    $hash_parent ne '-c' && $hash_parent ne '--cc') {
7524                        # commitdiff with two commits given
7525                        my $hash_parent_short = $hash_parent;
7526                        if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7527                                $hash_parent_short = substr($hash_parent, 0, 7);
7528                        }
7529                        $formats_nav .=
7530                                ' (from';
7531                        for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7532                                if ($co{'parents'}[$i] eq $hash_parent) {
7533                                        $formats_nav .= ' parent ' . ($i+1);
7534                                        last;
7535                                }
7536                        }
7537                        $formats_nav .= ': ' .
7538                                $cgi->a({-href => href(-replay=>1,
7539                                                       hash=>$hash_parent, hash_base=>undef)},
7540                                        esc_html($hash_parent_short)) .
7541                                ')';
7542                } elsif (!$co{'parent'}) {
7543                        # --root commitdiff
7544                        $formats_nav .= ' (initial)';
7545                } elsif (scalar @{$co{'parents'}} == 1) {
7546                        # single parent commit
7547                        $formats_nav .=
7548                                ' (parent: ' .
7549                                $cgi->a({-href => href(-replay=>1,
7550                                                       hash=>$co{'parent'}, hash_base=>undef)},
7551                                        esc_html(substr($co{'parent'}, 0, 7))) .
7552                                ')';
7553                } else {
7554                        # merge commit
7555                        if ($hash_parent eq '--cc') {
7556                                $formats_nav .= ' | ' .
7557                                        $cgi->a({-href => href(-replay=>1,
7558                                                               hash=>$hash, hash_parent=>'-c')},
7559                                                'combined');
7560                        } else { # $hash_parent eq '-c'
7561                                $formats_nav .= ' | ' .
7562                                        $cgi->a({-href => href(-replay=>1,
7563                                                               hash=>$hash, hash_parent=>'--cc')},
7564                                                'compact');
7565                        }
7566                        $formats_nav .=
7567                                ' (merge: ' .
7568                                join(' ', map {
7569                                        $cgi->a({-href => href(-replay=>1,
7570                                                               hash=>$_, hash_base=>undef)},
7571                                                esc_html(substr($_, 0, 7)));
7572                                } @{$co{'parents'}} ) .
7573                                ')';
7574                }
7575        }
7576
7577        my $hash_parent_param = $hash_parent;
7578        if (!defined $hash_parent_param) {
7579                # --cc for multiple parents, --root for parentless
7580                $hash_parent_param =
7581                        @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7582        }
7583
7584        # read commitdiff
7585        my $fd;
7586        my @difftree;
7587        if ($format eq 'html') {
7588                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7589                        "--no-commit-id", "--patch-with-raw", "--full-index",
7590                        $hash_parent_param, $hash, "--"
7591                        or die_error(500, "Open git-diff-tree failed");
7592
7593                while (my $line = <$fd>) {
7594                        chomp $line;
7595                        # empty line ends raw part of diff-tree output
7596                        last unless $line;
7597                        push @difftree, scalar parse_difftree_raw_line($line);
7598                }
7599
7600        } elsif ($format eq 'plain') {
7601                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7602                        '-p', $hash_parent_param, $hash, "--"
7603                        or die_error(500, "Open git-diff-tree failed");
7604        } elsif ($format eq 'patch') {
7605                # For commit ranges, we limit the output to the number of
7606                # patches specified in the 'patches' feature.
7607                # For single commits, we limit the output to a single patch,
7608                # diverging from the git-format-patch default.
7609                my @commit_spec = ();
7610                if ($hash_parent) {
7611                        if ($patch_max > 0) {
7612                                push @commit_spec, "-$patch_max";
7613                        }
7614                        push @commit_spec, '-n', "$hash_parent..$hash";
7615                } else {
7616                        if ($params{-single}) {
7617                                push @commit_spec, '-1';
7618                        } else {
7619                                if ($patch_max > 0) {
7620                                        push @commit_spec, "-$patch_max";
7621                                }
7622                                push @commit_spec, "-n";
7623                        }
7624                        push @commit_spec, '--root', $hash;
7625                }
7626                open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7627                        '--encoding=utf8', '--stdout', @commit_spec
7628                        or die_error(500, "Open git-format-patch failed");
7629        } else {
7630                die_error(400, "Unknown commitdiff format");
7631        }
7632
7633        # non-textual hash id's can be cached
7634        my $expires;
7635        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7636                $expires = "+1d";
7637        }
7638
7639        # write commit message
7640        if ($format eq 'html') {
7641                my $refs = git_get_references();
7642                my $ref = format_ref_marker($refs, $co{'id'});
7643
7644                git_header_html(undef, $expires);
7645                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7646                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7647                print "<div class=\"title_text\">\n" .
7648                      "<table class=\"object_header\">\n";
7649                git_print_authorship_rows(\%co);
7650                print "</table>".
7651                      "</div>\n";
7652                print "<div class=\"page_body\">\n";
7653                if (@{$co{'comment'}} > 1) {
7654                        print "<div class=\"log\">\n";
7655                        git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7656                        print "</div>\n"; # class="log"
7657                }
7658
7659        } elsif ($format eq 'plain') {
7660                my $refs = git_get_references("tags");
7661                my $tagname = git_get_rev_name_tags($hash);
7662                my $filename = basename($project) . "-$hash.patch";
7663
7664                print $cgi->header(
7665                        -type => 'text/plain',
7666                        -charset => 'utf-8',
7667                        -expires => $expires,
7668                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7669                my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7670                print "From: " . to_utf8($co{'author'}) . "\n";
7671                print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7672                print "Subject: " . to_utf8($co{'title'}) . "\n";
7673
7674                print "X-Git-Tag: $tagname\n" if $tagname;
7675                print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7676
7677                foreach my $line (@{$co{'comment'}}) {
7678                        print to_utf8($line) . "\n";
7679                }
7680                print "---\n\n";
7681        } elsif ($format eq 'patch') {
7682                my $filename = basename($project) . "-$hash.patch";
7683
7684                print $cgi->header(
7685                        -type => 'text/plain',
7686                        -charset => 'utf-8',
7687                        -expires => $expires,
7688                        -content_disposition => 'inline; filename="' . "$filename" . '"');
7689        }
7690
7691        # write patch
7692        if ($format eq 'html') {
7693                my $use_parents = !defined $hash_parent ||
7694                        $hash_parent eq '-c' || $hash_parent eq '--cc';
7695                git_difftree_body(\@difftree, $hash,
7696                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7697                print "<br/>\n";
7698
7699                git_patchset_body($fd, $diff_style,
7700                                  \@difftree, $hash,
7701                                  $use_parents ? @{$co{'parents'}} : $hash_parent);
7702                close $fd;
7703                print "</div>\n"; # class="page_body"
7704                git_footer_html();
7705
7706        } elsif ($format eq 'plain') {
7707                local $/ = undef;
7708                print <$fd>;
7709                close $fd
7710                        or print "Reading git-diff-tree failed\n";
7711        } elsif ($format eq 'patch') {
7712                local $/ = undef;
7713                print <$fd>;
7714                close $fd
7715                        or print "Reading git-format-patch failed\n";
7716        }
7717}
7718
7719sub git_commitdiff_plain {
7720        git_commitdiff(-format => 'plain');
7721}
7722
7723# format-patch-style patches
7724sub git_patch {
7725        git_commitdiff(-format => 'patch', -single => 1);
7726}
7727
7728sub git_patches {
7729        git_commitdiff(-format => 'patch');
7730}
7731
7732sub git_history {
7733        git_log_generic('history', \&git_history_body,
7734                        $hash_base, $hash_parent_base,
7735                        $file_name, $hash);
7736}
7737
7738sub git_search {
7739        $searchtype ||= 'commit';
7740
7741        # check if appropriate features are enabled
7742        gitweb_check_feature('search')
7743                or die_error(403, "Search is disabled");
7744        if ($searchtype eq 'pickaxe') {
7745                # pickaxe may take all resources of your box and run for several minutes
7746                # with every query - so decide by yourself how public you make this feature
7747                gitweb_check_feature('pickaxe')
7748                        or die_error(403, "Pickaxe search is disabled");
7749        }
7750        if ($searchtype eq 'grep') {
7751                # grep search might be potentially CPU-intensive, too
7752                gitweb_check_feature('grep')
7753                        or die_error(403, "Grep search is disabled");
7754        }
7755
7756        if (!defined $searchtext) {
7757                die_error(400, "Text field is empty");
7758        }
7759        if (!defined $hash) {
7760                $hash = git_get_head_hash($project);
7761        }
7762        my %co = parse_commit($hash);
7763        if (!%co) {
7764                die_error(404, "Unknown commit object");
7765        }
7766        if (!defined $page) {
7767                $page = 0;
7768        }
7769
7770        if ($searchtype eq 'commit' ||
7771            $searchtype eq 'author' ||
7772            $searchtype eq 'committer') {
7773                git_search_message(%co);
7774        } elsif ($searchtype eq 'pickaxe') {
7775                git_search_changes(%co);
7776        } elsif ($searchtype eq 'grep') {
7777                git_search_files(%co);
7778        } else {
7779                die_error(400, "Unknown search type");
7780        }
7781}
7782
7783sub git_search_help {
7784        git_header_html();
7785        git_print_page_nav('','', $hash,$hash,$hash);
7786        print <<EOT;
7787<p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7788regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7789the pattern entered is recognized as the POSIX extended
7790<a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7791insensitive).</p>
7792<dl>
7793<dt><b>commit</b></dt>
7794<dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7795EOT
7796        my $have_grep = gitweb_check_feature('grep');
7797        if ($have_grep) {
7798                print <<EOT;
7799<dt><b>grep</b></dt>
7800<dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7801    a different one) are searched for the given pattern. On large trees, this search can take
7802a while and put some strain on the server, so please use it with some consideration. Note that
7803due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7804case-sensitive.</dd>
7805EOT
7806        }
7807        print <<EOT;
7808<dt><b>author</b></dt>
7809<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7810<dt><b>committer</b></dt>
7811<dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7812EOT
7813        my $have_pickaxe = gitweb_check_feature('pickaxe');
7814        if ($have_pickaxe) {
7815                print <<EOT;
7816<dt><b>pickaxe</b></dt>
7817<dd>All commits that caused the string to appear or disappear from any file (changes that
7818added, removed or "modified" the string) will be listed. This search can take a while and
7819takes a lot of strain on the server, so please use it wisely. Note that since you may be
7820interested even in changes just changing the case as well, this search is case sensitive.</dd>
7821EOT
7822        }
7823        print "</dl>\n";
7824        git_footer_html();
7825}
7826
7827sub git_shortlog {
7828        git_log_generic('shortlog', \&git_shortlog_body,
7829                        $hash, $hash_parent);
7830}
7831
7832## ......................................................................
7833## feeds (RSS, Atom; OPML)
7834
7835sub git_feed {
7836        my $format = shift || 'atom';
7837        my $have_blame = gitweb_check_feature('blame');
7838
7839        # Atom: http://www.atomenabled.org/developers/syndication/
7840        # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7841        if ($format ne 'rss' && $format ne 'atom') {
7842                die_error(400, "Unknown web feed format");
7843        }
7844
7845        # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7846        my $head = $hash || 'HEAD';
7847        my @commitlist = parse_commits($head, 150, 0, $file_name);
7848
7849        my %latest_commit;
7850        my %latest_date;
7851        my $content_type = "application/$format+xml";
7852        if (defined $cgi->http('HTTP_ACCEPT') &&
7853                 $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7854                # browser (feed reader) prefers text/xml
7855                $content_type = 'text/xml';
7856        }
7857        if (defined($commitlist[0])) {
7858                %latest_commit = %{$commitlist[0]};
7859                my $latest_epoch = $latest_commit{'committer_epoch'};
7860                %latest_date   = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
7861                my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7862                if (defined $if_modified) {
7863                        my $since;
7864                        if (eval { require HTTP::Date; 1; }) {
7865                                $since = HTTP::Date::str2time($if_modified);
7866                        } elsif (eval { require Time::ParseDate; 1; }) {
7867                                $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7868                        }
7869                        if (defined $since && $latest_epoch <= $since) {
7870                                print $cgi->header(
7871                                        -type => $content_type,
7872                                        -charset => 'utf-8',
7873                                        -last_modified => $latest_date{'rfc2822'},
7874                                        -status => '304 Not Modified');
7875                                return;
7876                        }
7877                }
7878                print $cgi->header(
7879                        -type => $content_type,
7880                        -charset => 'utf-8',
7881                        -last_modified => $latest_date{'rfc2822'});
7882        } else {
7883                print $cgi->header(
7884                        -type => $content_type,
7885                        -charset => 'utf-8');
7886        }
7887
7888        # Optimization: skip generating the body if client asks only
7889        # for Last-Modified date.
7890        return if ($cgi->request_method() eq 'HEAD');
7891
7892        # header variables
7893        my $title = "$site_name - $project/$action";
7894        my $feed_type = 'log';
7895        if (defined $hash) {
7896                $title .= " - '$hash'";
7897                $feed_type = 'branch log';
7898                if (defined $file_name) {
7899                        $title .= " :: $file_name";
7900                        $feed_type = 'history';
7901                }
7902        } elsif (defined $file_name) {
7903                $title .= " - $file_name";
7904                $feed_type = 'history';
7905        }
7906        $title .= " $feed_type";
7907        my $descr = git_get_project_description($project);
7908        if (defined $descr) {
7909                $descr = esc_html($descr);
7910        } else {
7911                $descr = "$project " .
7912                         ($format eq 'rss' ? 'RSS' : 'Atom') .
7913                         " feed";
7914        }
7915        my $owner = git_get_project_owner($project);
7916        $owner = esc_html($owner);
7917
7918        #header
7919        my $alt_url;
7920        if (defined $file_name) {
7921                $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7922        } elsif (defined $hash) {
7923                $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7924        } else {
7925                $alt_url = href(-full=>1, action=>"summary");
7926        }
7927        print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7928        if ($format eq 'rss') {
7929                print <<XML;
7930<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7931<channel>
7932XML
7933                print "<title>$title</title>\n" .
7934                      "<link>$alt_url</link>\n" .
7935                      "<description>$descr</description>\n" .
7936                      "<language>en</language>\n" .
7937                      # project owner is responsible for 'editorial' content
7938                      "<managingEditor>$owner</managingEditor>\n";
7939                if (defined $logo || defined $favicon) {
7940                        # prefer the logo to the favicon, since RSS
7941                        # doesn't allow both
7942                        my $img = esc_url($logo || $favicon);
7943                        print "<image>\n" .
7944                              "<url>$img</url>\n" .
7945                              "<title>$title</title>\n" .
7946                              "<link>$alt_url</link>\n" .
7947                              "</image>\n";
7948                }
7949                if (%latest_date) {
7950                        print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7951                        print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7952                }
7953                print "<generator>gitweb v.$version/$git_version</generator>\n";
7954        } elsif ($format eq 'atom') {
7955                print <<XML;
7956<feed xmlns="http://www.w3.org/2005/Atom">
7957XML
7958                print "<title>$title</title>\n" .
7959                      "<subtitle>$descr</subtitle>\n" .
7960                      '<link rel="alternate" type="text/html" href="' .
7961                      $alt_url . '" />' . "\n" .
7962                      '<link rel="self" type="' . $content_type . '" href="' .
7963                      $cgi->self_url() . '" />' . "\n" .
7964                      "<id>" . href(-full=>1) . "</id>\n" .
7965                      # use project owner for feed author
7966                      "<author><name>$owner</name></author>\n";
7967                if (defined $favicon) {
7968                        print "<icon>" . esc_url($favicon) . "</icon>\n";
7969                }
7970                if (defined $logo) {
7971                        # not twice as wide as tall: 72 x 27 pixels
7972                        print "<logo>" . esc_url($logo) . "</logo>\n";
7973                }
7974                if (! %latest_date) {
7975                        # dummy date to keep the feed valid until commits trickle in:
7976                        print "<updated>1970-01-01T00:00:00Z</updated>\n";
7977                } else {
7978                        print "<updated>$latest_date{'iso-8601'}</updated>\n";
7979                }
7980                print "<generator version='$version/$git_version'>gitweb</generator>\n";
7981        }
7982
7983        # contents
7984        for (my $i = 0; $i <= $#commitlist; $i++) {
7985                my %co = %{$commitlist[$i]};
7986                my $commit = $co{'id'};
7987                # we read 150, we always show 30 and the ones more recent than 48 hours
7988                if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7989                        last;
7990                }
7991                my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
7992
7993                # get list of changed files
7994                open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7995                        $co{'parent'} || "--root",
7996                        $co{'id'}, "--", (defined $file_name ? $file_name : ())
7997                        or next;
7998                my @difftree = map { chomp; $_ } <$fd>;
7999                close $fd
8000                        or next;
8001
8002                # print element (entry, item)
8003                my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8004                if ($format eq 'rss') {
8005                        print "<item>\n" .
8006                              "<title>" . esc_html($co{'title'}) . "</title>\n" .
8007                              "<author>" . esc_html($co{'author'}) . "</author>\n" .
8008                              "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8009                              "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8010                              "<link>$co_url</link>\n" .
8011                              "<description>" . esc_html($co{'title'}) . "</description>\n" .
8012                              "<content:encoded>" .
8013                              "<![CDATA[\n";
8014                } elsif ($format eq 'atom') {
8015                        print "<entry>\n" .
8016                              "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8017                              "<updated>$cd{'iso-8601'}</updated>\n" .
8018                              "<author>\n" .
8019                              "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8020                        if ($co{'author_email'}) {
8021                                print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8022                        }
8023                        print "</author>\n" .
8024                              # use committer for contributor
8025                              "<contributor>\n" .
8026                              "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8027                        if ($co{'committer_email'}) {
8028                                print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8029                        }
8030                        print "</contributor>\n" .
8031                              "<published>$cd{'iso-8601'}</published>\n" .
8032                              "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8033                              "<id>$co_url</id>\n" .
8034                              "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8035                              "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8036                }
8037                my $comment = $co{'comment'};
8038                print "<pre>\n";
8039                foreach my $line (@$comment) {
8040                        $line = esc_html($line);
8041                        print "$line\n";
8042                }
8043                print "</pre><ul>\n";
8044                foreach my $difftree_line (@difftree) {
8045                        my %difftree = parse_difftree_raw_line($difftree_line);
8046                        next if !$difftree{'from_id'};
8047
8048                        my $file = $difftree{'file'} || $difftree{'to_file'};
8049
8050                        print "<li>" .
8051                              "[" .
8052                              $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8053                                                     hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8054                                                     hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8055                                                     file_name=>$file, file_parent=>$difftree{'from_file'}),
8056                                      -title => "diff"}, 'D');
8057                        if ($have_blame) {
8058                                print $cgi->a({-href => href(-full=>1, action=>"blame",
8059                                                             file_name=>$file, hash_base=>$commit),
8060                                              -title => "blame"}, 'B');
8061                        }
8062                        # if this is not a feed of a file history
8063                        if (!defined $file_name || $file_name ne $file) {
8064                                print $cgi->a({-href => href(-full=>1, action=>"history",
8065                                                             file_name=>$file, hash=>$commit),
8066                                              -title => "history"}, 'H');
8067                        }
8068                        $file = esc_path($file);
8069                        print "] ".
8070                              "$file</li>\n";
8071                }
8072                if ($format eq 'rss') {
8073                        print "</ul>]]>\n" .
8074                              "</content:encoded>\n" .
8075                              "</item>\n";
8076                } elsif ($format eq 'atom') {
8077                        print "</ul>\n</div>\n" .
8078                              "</content>\n" .
8079                              "</entry>\n";
8080                }
8081        }
8082
8083        # end of feed
8084        if ($format eq 'rss') {
8085                print "</channel>\n</rss>\n";
8086        } elsif ($format eq 'atom') {
8087                print "</feed>\n";
8088        }
8089}
8090
8091sub git_rss {
8092        git_feed('rss');
8093}
8094
8095sub git_atom {
8096        git_feed('atom');
8097}
8098
8099sub git_opml {
8100        my @list = git_get_projects_list($project_filter, $strict_export);
8101        if (!@list) {
8102                die_error(404, "No projects found");
8103        }
8104
8105        print $cgi->header(
8106                -type => 'text/xml',
8107                -charset => 'utf-8',
8108                -content_disposition => 'inline; filename="opml.xml"');
8109
8110        my $title = esc_html($site_name);
8111        my $filter = " within subdirectory ";
8112        if (defined $project_filter) {
8113                $filter .= esc_html($project_filter);
8114        } else {
8115                $filter = "";
8116        }
8117        print <<XML;
8118<?xml version="1.0" encoding="utf-8"?>
8119<opml version="1.0">
8120<head>
8121  <title>$title OPML Export$filter</title>
8122</head>
8123<body>
8124<outline text="git RSS feeds">
8125XML
8126
8127        foreach my $pr (@list) {
8128                my %proj = %$pr;
8129                my $head = git_get_head_hash($proj{'path'});
8130                if (!defined $head) {
8131                        next;
8132                }
8133                $git_dir = "$projectroot/$proj{'path'}";
8134                my %co = parse_commit($head);
8135                if (!%co) {
8136                        next;
8137                }
8138
8139                my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8140                my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8141                my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8142                print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8143        }
8144        print <<XML;
8145</outline>
8146</body>
8147</opml>
8148XML
8149}