gitolite/update-hook.pl
2009-08-25 11:06:03 +05:30

85 lines
2.5 KiB
Perl
Executable file

#!/usr/bin/perl -w
use strict;
# === update ===
# this is gitosis-lite's update hook
# part of the gitosis-lite (GL) suite
# how run: via git, being copied as .git/hooks/update in every repo
# when: every push
# input:
# - see man githooks for STDIN
# - uses the compiled config file to get permissions info
# output: based on permissions etc., exit 0 or 1
# security:
# - none
# robustness:
# other notes:
# ----------------------------------------------------------------------------
# common definitions
# ----------------------------------------------------------------------------
our $GL_ADMINDIR;
our $GL_CONF;
our $GL_KEYDIR;
our $GL_CONF_COMPILED;
our $REPO_BASE;
our %repos;
my $glrc = $ENV{HOME} . "/.gitosis-lite.rc";
unless (my $ret = do $glrc)
{
die "parse $glrc failed: $@" if $@;
die "couldn't do $glrc: $!" unless defined $ret;
die "couldn't run $glrc" unless $ret;
}
die "couldnt do perms file" unless (my $ret = do $GL_CONF_COMPILED);
# ----------------------------------------------------------------------------
# start...
# ----------------------------------------------------------------------------
my $ref = shift;
my $oldsha = shift;
my $newsha = shift;
my $merge_base = '0' x 40;
# compute a merge-base if both SHAs are non-0, else leave it as '0'x40
# (i.e., for branch create or delete, merge_base == '0'x40)
chomp($merge_base = `git merge-base $oldsha $newsha`)
unless $oldsha eq '0' x 40
or $newsha eq '0' x 40;
# some of this is from an example hook in Documentation/howto of git.git, with
# some variations
# what are you trying to do? (is it 'W' or '+'?)
my $perm = 'W';
# rewriting a tag is considered a rewind, in terms of permissions
$perm = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
# non-ff push to branch. Notice that branch delete looks like a rewind, as it
# should
$perm = '+' if $ref =~ m(refs/heads/) and $oldsha ne $merge_base;
my $allowed_refs = $repos{$ENV{GL_REPO}}{$perm}{$ENV{GL_USER}};
for my $refex (@$allowed_refs)
# refex? sure -- a regex to match a ref against :)
{
if ($ref =~ /$refex/)
{
# if log failure isn't important enough to block pushes, get rid of
# all the error checking
open my $log_fh, ">>", "$GL_ADMINDIR/log"
or die "open log failed: $!";
print $log_fh "$perm: $ENV{GL_USER} $ENV{GL_REPO} $ref $oldsha $newsha\n";
close $log_fh or die "close log failed: $!";
exit 0;
}
}
exit 1;