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gitweb.perl
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#!/usr/bin/perl
# gitweb - simple web interface to track changes in git repositories
#
# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
# (C) 2005, Christian Gierke
#
# This program is licensed under the GPLv2
use 5.008;
use strict;
use warnings;
use CGI qw(:standard :escapeHTML -nosticky);
use CGI::Util qw(unescape);
use CGI::Carp qw(fatalsToBrowser set_message);
use Encode;
use Fcntl ':mode';
use File::Find qw();
use File::Basename qw(basename);
use Time::HiRes qw(gettimeofday tv_interval);
binmode STDOUT, ':utf8';
our $t0 = [ gettimeofday() ];
our $number_of_git_cmds = 0;
BEGIN {
CGI->compile() if $ENV{'MOD_PERL'};
}
our $version = "++GIT_VERSION++";
our ($my_url, $my_uri, $base_url, $path_info, $home_link);
sub evaluate_uri {
our $cgi;
our $my_url = $cgi->url();
our $my_uri = $cgi->url(-absolute => 1);
# Base URL for relative URLs in gitweb ($logo, $favicon, ...),
# needed and used only for URLs with nonempty PATH_INFO
our $base_url = $my_url;
# When the script is used as DirectoryIndex, the URL does not contain the name
# of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
# have to do it ourselves. We make $path_info global because it's also used
# later on.
#
# Another issue with the script being the DirectoryIndex is that the resulting
# $my_url data is not the full script URL: this is good, because we want
# generated links to keep implying the script name if it wasn't explicitly
# indicated in the URL we're handling, but it means that $my_url cannot be used
# as base URL.
# Therefore, if we needed to strip PATH_INFO, then we know that we have
# to build the base URL ourselves:
our $path_info = decode_utf8($ENV{"PATH_INFO"});
if ($path_info) {
# $path_info has already been URL-decoded by the web server, but
# $my_url and $my_uri have not. URL-decode them so we can properly
# strip $path_info.
$my_url = unescape($my_url);
$my_uri = unescape($my_uri);
if ($my_url =~ s,\Q$path_info\E$,, &&
$my_uri =~ s,\Q$path_info\E$,, &&
defined $ENV{'SCRIPT_NAME'}) {
$base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
}
}
# target of the home link on top of all pages
our $home_link = $my_uri || "/";
}
# core git executable to use
# this can just be "git" if your webserver has a sensible PATH
our $GIT = "++GIT_BINDIR++/git";
# absolute fs-path which will be prepended to the project path
#our $projectroot = "/pub/scm";
our $projectroot = "++GITWEB_PROJECTROOT++";
# fs traversing limit for getting project list
# the number is relative to the projectroot
our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
# string of the home link on top of all pages
our $home_link_str = "++GITWEB_HOME_LINK_STR++";
# name of your site or organization to appear in page titles
# replace this with something more descriptive for clearer bookmarks
our $site_name = "++GITWEB_SITENAME++"
|| ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
# html snippet to include in the <head> section of each page
our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
# filename of html text to include at top of each page
our $site_header = "++GITWEB_SITE_HEADER++";
# html text to include at home page
our $home_text = "++GITWEB_HOMETEXT++";
# filename of html text to include at bottom of each page
our $site_footer = "++GITWEB_SITE_FOOTER++";
# URI of stylesheets
our @stylesheets = ("++GITWEB_CSS++");
# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
our $stylesheet = undef;
# URI of GIT logo (72x27 size)
our $logo = "++GITWEB_LOGO++";
# URI of GIT favicon, assumed to be image/png type
our $favicon = "++GITWEB_FAVICON++";
# URI of gitweb.js (JavaScript code for gitweb)
our $javascript = "++GITWEB_JS++";
# URI and label (title) of GIT logo link
#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
#our $logo_label = "git documentation";
our $logo_url = "http://git-scm.com/";
our $logo_label = "git homepage";
# source of projects list
our $projects_list = "++GITWEB_LIST++";
# the width (in characters) of the projects list "Description" column
our $projects_list_description_width = 25;
# group projects by category on the projects list
# (enabled if this variable evaluates to true)
our $projects_list_group_categories = 0;
# default category if none specified
# (leave the empty string for no category)
our $project_list_default_category = "";
# default order of projects list
# valid values are none, project, descr, owner, and age
our $default_projects_order = "project";
# show repository only if this file exists
# (only effective if this variable evaluates to true)
our $export_ok = "++GITWEB_EXPORT_OK++";
# don't generate age column on the projects list page
our $omit_age_column = 0;
# don't generate information about owners of repositories
our $omit_owner=0;
# show repository only if this subroutine returns true
# when given the path to the project, for example:
# sub { return -e "$_[0]/git-daemon-export-ok"; }
our $export_auth_hook = undef;
# only allow viewing of repositories also shown on the overview page
our $strict_export = "++GITWEB_STRICT_EXPORT++";
# list of git base URLs used for URL to where fetch project from,
# i.e. full URL is "$git_base_url/$project"
our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
# default blob_plain mimetype and default charset for text/plain blob
our $default_blob_plain_mimetype = 'text/plain';
our $default_text_plain_charset = undef;
# file to use for guessing MIME types before trying /etc/mime.types
# (relative to the current git repository)
our $mimetypes_file = undef;
# assume this charset if line contains non-UTF-8 characters;
# it should be valid encoding (see Encoding::Supported(3pm) for list),
# for which encoding all byte sequences are valid, for example
# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
# could be even 'utf-8' for the old behavior)
our $fallback_encoding = 'latin1';
# rename detection options for git-diff and git-diff-tree
# - default is '-M', with the cost proportional to
# (number of removed files) * (number of new files).
# - more costly is '-C' (which implies '-M'), with the cost proportional to
# (number of changed files + number of removed files) * (number of new files)
# - even more costly is '-C', '--find-copies-harder' with cost
# (number of files in the original tree) * (number of new files)
# - one might want to include '-B' option, e.g. '-B', '-M'
our @diff_opts = ('-M'); # taken from git_commit
# Disables features that would allow repository owners to inject script into
# the gitweb domain.
our $prevent_xss = 0;
# Path to the highlight executable to use (must be the one from
# http://www.andre-simon.de due to assumptions about parameters and output).
# Useful if highlight is not installed on your webserver's PATH.
# [Default: highlight]
our $highlight_bin = "++HIGHLIGHT_BIN++";
# information about snapshot formats that gitweb is capable of serving
our %known_snapshot_formats = (
# name => {
# 'display' => display name,
# 'type' => mime type,
# 'suffix' => filename suffix,
# 'format' => --format for git-archive,
# 'compressor' => [compressor command and arguments]
# (array reference, optional)
# 'disabled' => boolean (optional)}
#
'tgz' => {
'display' => 'tar.gz',
'type' => 'application/x-gzip',
'suffix' => '.tar.gz',
'format' => 'tar',
'compressor' => ['gzip', '-n']},
'tbz2' => {
'display' => 'tar.bz2',
'type' => 'application/x-bzip2',
'suffix' => '.tar.bz2',
'format' => 'tar',
'compressor' => ['bzip2']},
'txz' => {
'display' => 'tar.xz',
'type' => 'application/x-xz',
'suffix' => '.tar.xz',
'format' => 'tar',
'compressor' => ['xz'],
'disabled' => 1},
'zip' => {
'display' => 'zip',
'type' => 'application/x-zip',
'suffix' => '.zip',
'format' => 'zip'},
);
# Aliases so we understand old gitweb.snapshot values in repository
# configuration.
our %known_snapshot_format_aliases = (
'gzip' => 'tgz',
'bzip2' => 'tbz2',
'xz' => 'txz',
# backward compatibility: legacy gitweb config support
'x-gzip' => undef, 'gz' => undef,
'x-bzip2' => undef, 'bz2' => undef,
'x-zip' => undef, '' => undef,
);
# Pixel sizes for icons and avatars. If the default font sizes or lineheights
# are changed, it may be appropriate to change these values too via
# $GITWEB_CONFIG.
our %avatar_size = (
'default' => 16,
'double' => 32
);
# Used to set the maximum load that we will still respond to gitweb queries.
# If server load exceed this value then return "503 server busy" error.
# If gitweb cannot determined server load, it is taken to be 0.
# Leave it undefined (or set to 'undef') to turn off load checking.
our $maxload = 300;
# configuration for 'highlight' (http://www.andre-simon.de/)
# match by basename
our %highlight_basename = (
#'Program' => 'py',
#'Library' => 'py',
'SConstruct' => 'py', # SCons equivalent of Makefile
'Makefile' => 'make',
);
# match by extension
our %highlight_ext = (
# main extensions, defining name of syntax;
# see files in /usr/share/highlight/langDefs/ directory
(map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
# alternate extensions, see /etc/highlight/filetypes.conf
(map { $_ => 'c' } qw(c h)),
(map { $_ => 'sh' } qw(sh bash zsh ksh)),
(map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
(map { $_ => 'php' } qw(php php3 php4 php5 phps)),
(map { $_ => 'pl' } qw(pl perl pm)), # perhaps also 'cgi'
(map { $_ => 'make'} qw(make mak mk)),
(map { $_ => 'xml' } qw(xml xhtml html htm)),
);
# You define site-wide feature defaults here; override them with
# $GITWEB_CONFIG as necessary.
our %feature = (
# feature => {
# 'sub' => feature-sub (subroutine),
# 'override' => allow-override (boolean),
# 'default' => [ default options...] (array reference)}
#
# if feature is overridable (it means that allow-override has true value),
# then feature-sub will be called with default options as parameters;
# return value of feature-sub indicates if to enable specified feature
#
# if there is no 'sub' key (no feature-sub), then feature cannot be
# overridden
#
# use gitweb_get_feature(<feature>) to retrieve the <feature> value
# (an array) or gitweb_check_feature(<feature>) to check if <feature>
# is enabled
# Enable the 'blame' blob view, showing the last commit that modified
# each line in the file. This can be very CPU-intensive.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'blame'}{'default'} = [1];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'blame'}{'override'} = 1;
# and in project config gitweb.blame = 0|1;
'blame' => {
'sub' => sub { feature_bool('blame', @_) },
'override' => 0,
'default' => [0]},
# Enable the 'snapshot' link, providing a compressed archive of any
# tree. This can potentially generate high traffic if you have large
# project.
# Value is a list of formats defined in %known_snapshot_formats that
# you wish to offer.
# To disable system wide have in $GITWEB_CONFIG
# $feature{'snapshot'}{'default'} = [];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'snapshot'}{'override'} = 1;
# and in project config, a comma-separated list of formats or "none"
# to disable. Example: gitweb.snapshot = tbz2,zip;
'snapshot' => {
'sub' => \&feature_snapshot,
'override' => 0,
'default' => ['tgz']},
# Enable text search, which will list the commits which match author,
# committer or commit text to a given string. Enabled by default.
# Project specific override is not supported.
#
# Note that this controls all search features, which means that if
# it is disabled, then 'grep' and 'pickaxe' search would also be
# disabled.
'search' => {
'override' => 0,
'default' => [1]},
# Enable grep search, which will list the files in currently selected
# tree containing the given string. Enabled by default. This can be
# potentially CPU-intensive, of course.
# Note that you need to have 'search' feature enabled too.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'grep'}{'default'} = [1];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'grep'}{'override'} = 1;
# and in project config gitweb.grep = 0|1;
'grep' => {
'sub' => sub { feature_bool('grep', @_) },
'override' => 0,
'default' => [1]},
# Enable the pickaxe search, which will list the commits that modified
# a given string in a file. This can be practical and quite faster
# alternative to 'blame', but still potentially CPU-intensive.
# Note that you need to have 'search' feature enabled too.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'pickaxe'}{'default'} = [1];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'pickaxe'}{'override'} = 1;
# and in project config gitweb.pickaxe = 0|1;
'pickaxe' => {
'sub' => sub { feature_bool('pickaxe', @_) },
'override' => 0,
'default' => [1]},
# Enable showing size of blobs in a 'tree' view, in a separate
# column, similar to what 'ls -l' does. This cost a bit of IO.
# To disable system wide have in $GITWEB_CONFIG
# $feature{'show-sizes'}{'default'} = [0];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'show-sizes'}{'override'} = 1;
# and in project config gitweb.showsizes = 0|1;
'show-sizes' => {
'sub' => sub { feature_bool('showsizes', @_) },
'override' => 0,
'default' => [1]},
# Make gitweb use an alternative format of the URLs which can be
# more readable and natural-looking: project name is embedded
# directly in the path and the query string contains other
# auxiliary information. All gitweb installations recognize
# URL in either format; this configures in which formats gitweb
# generates links.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'pathinfo'}{'default'} = [1];
# Project specific override is not supported.
# Note that you will need to change the default location of CSS,
# favicon, logo and possibly other files to an absolute URL. Also,
# if gitweb.cgi serves as your indexfile, you will need to force
# $my_uri to contain the script name in your $GITWEB_CONFIG.
'pathinfo' => {
'override' => 0,
'default' => [0]},
# Make gitweb consider projects in project root subdirectories
# to be forks of existing projects. Given project $projname.git,
# projects matching $projname/*.git will not be shown in the main
# projects list, instead a '+' mark will be added to $projname
# there and a 'forks' view will be enabled for the project, listing
# all the forks. If project list is taken from a file, forks have
# to be listed after the main project.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'forks'}{'default'} = [1];
# Project specific override is not supported.
'forks' => {
'override' => 0,
'default' => [0]},
# Insert custom links to the action bar of all project pages.
# This enables you mainly to link to third-party scripts integrating
# into gitweb; e.g. git-browser for graphical history representation
# or custom web-based repository administration interface.
# The 'default' value consists of a list of triplets in the form
# (label, link, position) where position is the label after which
# to insert the link and link is a format string where %n expands
# to the project name, %f to the project path within the filesystem,
# %h to the current hash (h gitweb parameter) and %b to the current
# hash base (hb gitweb parameter); %% expands to %.
# To enable system wide have in $GITWEB_CONFIG e.g.
# $feature{'actions'}{'default'} = [('graphiclog',
# '/git-browser/by-commit.html?r=%n', 'summary')];
# Project specific override is not supported.
'actions' => {
'override' => 0,
'default' => []},
# Allow gitweb scan project content tags of project repository,
# and display the popular Web 2.0-ish "tag cloud" near the projects
# list. Note that this is something COMPLETELY different from the
# normal Git tags.
# gitweb by itself can show existing tags, but it does not handle
# tagging itself; you need to do it externally, outside gitweb.
# The format is described in git_get_project_ctags() subroutine.
# You may want to install the HTML::TagCloud Perl module to get
# a pretty tag cloud instead of just a list of tags.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'ctags'}{'default'} = [1];
# Project specific override is not supported.
# In the future whether ctags editing is enabled might depend
# on the value, but using 1 should always mean no editing of ctags.
'ctags' => {
'override' => 0,
'default' => [0]},
# The maximum number of patches in a patchset generated in patch
# view. Set this to 0 or undef to disable patch view, or to a
# negative number to remove any limit.
# To disable system wide have in $GITWEB_CONFIG
# $feature{'patches'}{'default'} = [0];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'patches'}{'override'} = 1;
# and in project config gitweb.patches = 0|n;
# where n is the maximum number of patches allowed in a patchset.
'patches' => {
'sub' => \&feature_patches,
'override' => 0,
'default' => [16]},
# Avatar support. When this feature is enabled, views such as
# shortlog or commit will display an avatar associated with
# the email of the committer(s) and/or author(s).
# Currently available providers are gravatar and picon.
# If an unknown provider is specified, the feature is disabled.
# Gravatar depends on Digest::MD5.
# Picon currently relies on the indiana.edu database.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'avatar'}{'default'} = ['<provider>'];
# where <provider> is either gravatar or picon.
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'avatar'}{'override'} = 1;
# and in project config gitweb.avatar = <provider>;
'avatar' => {
'sub' => \&feature_avatar,
'override' => 0,
'default' => ['']},
# Enable displaying how much time and how many git commands
# it took to generate and display page. Disabled by default.
# Project specific override is not supported.
'timed' => {
'override' => 0,
'default' => [0]},
# Enable turning some links into links to actions which require
# JavaScript to run (like 'blame_incremental'). Not enabled by
# default. Project specific override is currently not supported.
'javascript-actions' => {
'override' => 0,
'default' => [0]},
# Enable and configure ability to change common timezone for dates
# in gitweb output via JavaScript. Enabled by default.
# Project specific override is not supported.
'javascript-timezone' => {
'override' => 0,
'default' => [
'local', # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
# or undef to turn off this feature
'gitweb_tz', # name of cookie where to store selected timezone
'datetime', # CSS class used to mark up dates for manipulation
]},
# Syntax highlighting support. This is based on Daniel Svensson's
# and Sham Chukoury's work in gitweb-xmms2.git.
# It requires the 'highlight' program present in $PATH,
# and therefore is disabled by default.
# To enable system wide have in $GITWEB_CONFIG
# $feature{'highlight'}{'default'} = [1];
'highlight' => {
'sub' => sub { feature_bool('highlight', @_) },
'override' => 0,
'default' => [0]},
# Enable displaying of remote heads in the heads list
# To enable system wide have in $GITWEB_CONFIG
# $feature{'remote_heads'}{'default'} = [1];
# To have project specific config enable override in $GITWEB_CONFIG
# $feature{'remote_heads'}{'override'} = 1;
# and in project config gitweb.remoteheads = 0|1;
'remote_heads' => {
'sub' => sub { feature_bool('remote_heads', @_) },
'override' => 0,
'default' => [0]},
);
sub gitweb_get_feature {
my ($name) = @_;
return unless exists $feature{$name};
my ($sub, $override, @defaults) = (
$feature{$name}{'sub'},
$feature{$name}{'override'},
@{$feature{$name}{'default'}});
# project specific override is possible only if we have project
our $git_dir; # global variable, declared later
if (!$override || !defined $git_dir) {
return @defaults;
}
if (!defined $sub) {
warn "feature $name is not overridable";
return @defaults;
}
return $sub->(@defaults);
}
# A wrapper to check if a given feature is enabled.
# With this, you can say
#
# my $bool_feat = gitweb_check_feature('bool_feat');
# gitweb_check_feature('bool_feat') or somecode;
#
# instead of
#
# my ($bool_feat) = gitweb_get_feature('bool_feat');
# (gitweb_get_feature('bool_feat'))[0] or somecode;
#
sub gitweb_check_feature {
return (gitweb_get_feature(@_))[0];
}
sub feature_bool {
my $key = shift;
my ($val) = git_get_project_config($key, '--bool');
if (!defined $val) {
return ($_[0]);
} elsif ($val eq 'true') {
return (1);
} elsif ($val eq 'false') {
return (0);
}
}
sub feature_snapshot {
my (@fmts) = @_;
my ($val) = git_get_project_config('snapshot');
if ($val) {
@fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
}
return @fmts;
}
sub feature_patches {
my @val = (git_get_project_config('patches', '--int'));
if (@val) {
return @val;
}
return ($_[0]);
}
sub feature_avatar {
my @val = (git_get_project_config('avatar'));
return @val ? @val : @_;
}
# checking HEAD file with -e is fragile if the repository was
# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
# and then pruned.
sub check_head_link {
my ($dir) = @_;
my $headfile = "$dir/HEAD";
return ((-e $headfile) ||
(-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
}
sub check_export_ok {
my ($dir) = @_;
return (check_head_link($dir) &&
(!$export_ok || -e "$dir/$export_ok") &&
(!$export_auth_hook || $export_auth_hook->($dir)));
}
# process alternate names for backward compatibility
# filter out unsupported (unknown) snapshot formats
sub filter_snapshot_fmts {
my @fmts = @_;
@fmts = map {
exists $known_snapshot_format_aliases{$_} ?
$known_snapshot_format_aliases{$_} : $_} @fmts;
@fmts = grep {
exists $known_snapshot_formats{$_} &&
!$known_snapshot_formats{$_}{'disabled'}} @fmts;
}
# If it is set to code reference, it is code that it is to be run once per
# request, allowing updating configurations that change with each request,
# while running other code in config file only once.
#
# Otherwise, if it is false then gitweb would process config file only once;
# if it is true then gitweb config would be run for each request.
our $per_request_config = 1;
# read and parse gitweb config file given by its parameter.
# returns true on success, false on recoverable error, allowing
# to chain this subroutine, using first file that exists.
# dies on errors during parsing config file, as it is unrecoverable.
sub read_config_file {
my $filename = shift;
return unless defined $filename;
# die if there are errors parsing config file
if (-e $filename) {
do $filename;
die $@ if $@;
return 1;
}
return;
}
our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
sub evaluate_gitweb_config {
our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
# Protect agains duplications of file names, to not read config twice.
# Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
# there possibility of duplication of filename there doesn't matter.
$GITWEB_CONFIG = "" if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
$GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
# Common system-wide settings for convenience.
# Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
read_config_file($GITWEB_CONFIG_COMMON);
# Use first config file that exists. This means use the per-instance
# GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
read_config_file($GITWEB_CONFIG) and return;
read_config_file($GITWEB_CONFIG_SYSTEM);
}
# Get loadavg of system, to compare against $maxload.
# Currently it requires '/proc/loadavg' present to get loadavg;
# if it is not present it returns 0, which means no load checking.
sub get_loadavg {
if( -e '/proc/loadavg' ){
open my $fd, '<', '/proc/loadavg'
or return 0;
my @load = split(/\s+/, scalar <$fd>);
close $fd;
# The first three columns measure CPU and IO utilization of the last one,
# five, and 10 minute periods. The fourth column shows the number of
# currently running processes and the total number of processes in the m/n
# format. The last column displays the last process ID used.
return $load[0] || 0;
}
# additional checks for load average should go here for things that don't export
# /proc/loadavg
return 0;
}
# version of the core git binary
our $git_version;
sub evaluate_git_version {
our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
$number_of_git_cmds++;
}
sub check_loadavg {
if (defined $maxload && get_loadavg() > $maxload) {
die_error(503, "The load average on the server is too high");
}
}
# ======================================================================
# input validation and dispatch
# input parameters can be collected from a variety of sources (presently, CGI
# and PATH_INFO), so we define an %input_params hash that collects them all
# together during validation: this allows subsequent uses (e.g. href()) to be
# agnostic of the parameter origin
our %input_params = ();
# input parameters are stored with the long parameter name as key. This will
# also be used in the href subroutine to convert parameters to their CGI
# equivalent, and since the href() usage is the most frequent one, we store
# the name -> CGI key mapping here, instead of the reverse.
#
# XXX: Warning: If you touch this, check the search form for updating,
# too.
our @cgi_param_mapping = (
project => "p",
action => "a",
file_name => "f",
file_parent => "fp",
hash => "h",
hash_parent => "hp",
hash_base => "hb",
hash_parent_base => "hpb",
page => "pg",
order => "o",
searchtext => "s",
searchtype => "st",
snapshot_format => "sf",
extra_options => "opt",
search_use_regexp => "sr",
ctag => "by_tag",
diff_style => "ds",
project_filter => "pf",
# this must be last entry (for manipulation from JavaScript)
javascript => "js"
);
our %cgi_param_mapping = @cgi_param_mapping;
# we will also need to know the possible actions, for validation
our %actions = (
"blame" => \&git_blame,
"blame_incremental" => \&git_blame_incremental,
"blame_data" => \&git_blame_data,
"blobdiff" => \&git_blobdiff,
"blobdiff_plain" => \&git_blobdiff_plain,
"blob" => \&git_blob,
"blob_plain" => \&git_blob_plain,
"commitdiff" => \&git_commitdiff,
"commitdiff_plain" => \&git_commitdiff_plain,
"commit" => \&git_commit,
"forks" => \&git_forks,
"heads" => \&git_heads,
"history" => \&git_history,
"log" => \&git_log,
"patch" => \&git_patch,
"patches" => \&git_patches,
"remotes" => \&git_remotes,
"rss" => \&git_rss,
"atom" => \&git_atom,
"search" => \&git_search,
"search_help" => \&git_search_help,
"shortlog" => \&git_shortlog,
"summary" => \&git_summary,
"tag" => \&git_tag,
"tags" => \&git_tags,
"tree" => \&git_tree,
"snapshot" => \&git_snapshot,
"object" => \&git_object,
# those below don't need $project
"opml" => \&git_opml,
"project_list" => \&git_project_list,
"project_index" => \&git_project_index,
);
# finally, we have the hash of allowed extra_options for the commands that
# allow them
our %allowed_options = (
"--no-merges" => [ qw(rss atom log shortlog history) ],
);
# fill %input_params with the CGI parameters. All values except for 'opt'
# should be single values, but opt can be an array. We should probably
# build an array of parameters that can be multi-valued, but since for the time
# being it's only this one, we just single it out
sub evaluate_query_params {
our $cgi;
while (my ($name, $symbol) = each %cgi_param_mapping) {
if ($symbol eq 'opt') {
$input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
} else {
$input_params{$name} = decode_utf8($cgi->param($symbol));
}
}
}
# now read PATH_INFO and update the parameter list for missing parameters
sub evaluate_path_info {
return if defined $input_params{'project'};
return if !$path_info;
$path_info =~ s,^/+,,;
return if !$path_info;
# find which part of PATH_INFO is project
my $project = $path_info;
$project =~ s,/+$,,;
while ($project && !check_head_link("$projectroot/$project")) {
$project =~ s,/*[^/]*$,,;
}
return unless $project;
$input_params{'project'} = $project;
# do not change any parameters if an action is given using the query string
return if $input_params{'action'};
$path_info =~ s,^\Q$project\E/*,,;
# next, check if we have an action
my $action = $path_info;
$action =~ s,/.*$,,;
if (exists $actions{$action}) {
$path_info =~ s,^$action/*,,;
$input_params{'action'} = $action;
}
# list of actions that want hash_base instead of hash, but can have no
# pathname (f) parameter
my @wants_base = (
'tree',
'history',
);
# we want to catch, among others
# [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
my ($parentrefname, $parentpathname, $refname, $pathname) =
($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
# first, analyze the 'current' part
if (defined $pathname) {
# we got "branch:filename" or "branch:dir/"
# we could use git_get_type(branch:pathname), but:
# - it needs $git_dir
# - it does a git() call
# - the convention of terminating directories with a slash
# makes it superfluous
# - embedding the action in the PATH_INFO would make it even
# more superfluous
$pathname =~ s,^/+,,;
if (!$pathname || substr($pathname, -1) eq "/") {
$input_params{'action'} ||= "tree";
$pathname =~ s,/$,,;
} else {
# the default action depends on whether we had parent info
# or not
if ($parentrefname) {
$input_params{'action'} ||= "blobdiff_plain";
} else {
$input_params{'action'} ||= "blob_plain";
}
}
$input_params{'hash_base'} ||= $refname;
$input_params{'file_name'} ||= $pathname;
} elsif (defined $refname) {
# we got "branch". In this case we have to choose if we have to
# set hash or hash_base.
#
# Most of the actions without a pathname only want hash to be
# set, except for the ones specified in @wants_base that want
# hash_base instead. It should also be noted that hand-crafted
# links having 'history' as an action and no pathname or hash
# set will fail, but that happens regardless of PATH_INFO.
if (defined $parentrefname) {
# if there is parent let the default be 'shortlog' action
# (for http://git.example.com/repo.git/A..B links); if there
# is no parent, dispatch will detect type of object and set
# action appropriately if required (if action is not set)
$input_params{'action'} ||= "shortlog";
}
if ($input_params{'action'} &&
grep { $_ eq $input_params{'action'} } @wants_base) {
$input_params{'hash_base'} ||= $refname;
} else {
$input_params{'hash'} ||= $refname;
}
}
# next, handle the 'parent' part, if present
if (defined $parentrefname) {
# a missing pathspec defaults to the 'current' filename, allowing e.g.
# someproject/blobdiff/oldrev..newrev:/filename
if ($parentpathname) {
$parentpathname =~ s,^/+,,;
$parentpathname =~ s,/$,,;
$input_params{'file_parent'} ||= $parentpathname;
} else {
$input_params{'file_parent'} ||= $input_params{'file_name'};
}
# we assume that hash_parent_base is wanted if a path was specified,
# or if the action wants hash_base instead of hash
if (defined $input_params{'file_parent'} ||
grep { $_ eq $input_params{'action'} } @wants_base) {
$input_params{'hash_parent_base'} ||= $parentrefname;
} else {
$input_params{'hash_parent'} ||= $parentrefname;
}
}
# for the snapshot action, we allow URLs in the form
# $project/snapshot/$hash.ext
# where .ext determines the snapshot and gets removed from the
# passed $refname to provide the $hash.
#
# To be able to tell that $refname includes the format extension, we
# require the following two conditions to be satisfied:
# - the hash input parameter MUST have been set from the $refname part
# of the URL (i.e. they must be equal)
# - the snapshot format MUST NOT have been defined already (e.g. from
# CGI parameter sf)
# It's also useless to try any matching unless $refname has a dot,
# so we check for that too
if (defined $input_params{'action'} &&
$input_params{'action'} eq 'snapshot' &&
defined $refname && index($refname, '.') != -1 &&
$refname eq $input_params{'hash'} &&
!defined $input_params{'snapshot_format'}) {
# We loop over the known snapshot formats, checking for
# extensions. Allowed extensions are both the defined suffix
# (which includes the initial dot already) and the snapshot
# format key itself, with a prepended dot
while (my ($fmt, $opt) = each %known_snapshot_formats) {
my $hash = $refname;
unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
next;
}
my $sfx = $1;
# a valid suffix was found, so set the snapshot format
# and reset the hash parameter
$input_params{'snapshot_format'} = $fmt;
$input_params{'hash'} = $hash;
# we also set the format suffix to the one requested
# in the URL: this way a request for e.g. .tgz returns
# a .tgz instead of a .tar.gz
$known_snapshot_formats{$fmt}{'suffix'} = $sfx;
last;
}
}
}
our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
$hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
$searchtext, $search_regexp, $project_filter);
sub evaluate_and_validate_params {
our $action = $input_params{'action'};
if (defined $action) {
if (!validate_action($action)) {
die_error(400, "Invalid action parameter");
}
}
# parameters which are pathnames
our $project = $input_params{'project'};