gitolite/src/update-hook.pl

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#!/usr/bin/perl
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use strict;
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use warnings;
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# === update ===
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# this is gitolite's update hook
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# part of the gitolite (GL) suite
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# 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_COMPILED;
our $PERSONAL;
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our %repos;
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my $glrc = $ENV{HOME} . "/.gitolite.rc";
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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 $merge_base = '0' x 40;
# compute a merge-base if both SHAs are non-0, else leave it as '0'x40
# (i.e., for branch create or delete, merge_base == '0'x40)
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chomp($merge_base = `git merge-base $oldsha $newsha`)
unless $oldsha eq '0' x 40
or $newsha eq '0' x 40;
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# 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 $perm = 'W';
# rewriting a tag is considered a rewind, in terms of permissions
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$perm = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
# non-ff push to ref
# notice that ref delete looks like a rewind, as it should
$perm = '+' if $oldsha ne $merge_base;
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my @allowed_refs;
push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$perm}{$ENV{GL_USER}} || [] };
push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$perm}{'@all'} || [] };
push @allowed_refs, "$PERSONAL/$ENV{GL_USER}-" if $PERSONAL;
for my $refex (@allowed_refs)
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# refex? sure -- a regex to match a ref against :)
{
if ($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: $!";
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exit 0;
}
}
exit 1;