#!/usr/bin/perl
use strict;
use warnings;

# called from gitolite before any git operations are run

# "we", "our repo"  =>  the partial copy
# "main", "pco"     =>  the one which we are a "partial copy of"

my $main=`git config --file $ENV{GL_REPO_BASE_ABS}/$ENV{GL_REPO}.git/config --get gitolite.partialCopyOf`;
chomp ($main);

exit 0 unless $main;

die "ENV GL_RC not set\n" unless $ENV{GL_RC};
die "ENV GL_BINDIR not set\n" unless $ENV{GL_BINDIR};

unshift @INC, $ENV{GL_BINDIR};
require gitolite or die "parse gitolite.pm failed\n";
gitolite->import;

my ($ref, $old, $new) = @ARGV;
my $rand = int(rand(100000000));

$ENV{GL_BYPASS_UPDATE_HOOK} = 1;
system("git", "push", "-f", "$ENV{GL_REPO_BASE_ABS}/$main.git", "$new:refs/heads/br-$rand") and die "FATAL: failed to send $new\n";

wrap_chdir("$ENV{GL_REPO_BASE_ABS}/$main.git");
system("git", "update-ref", "-d", "refs//heads/br-$rand");
system("git", "update-ref", $ref, $new, $old) and die "FATAL: update-ref for $ref failed\n";

exit 0;