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

# setup repo-specific hooks

use lib $ENV{GL_LIBDIR};
use Gitolite::Rc;
use Gitolite::Common;

_die "repo-specific-hooks: LOCAL_CODE not defined in rc" unless $rc{LOCAL_CODE};
_die "repo-specific-hooks: '$rc{LOCAL_CODE}/hooks/repo-specific' does not exist or is not a directory" unless -d "$rc{LOCAL_CODE}/hooks/repo-specific";

_chdir( $ENV{GL_REPO_BASE} );

if ($ARGV[0] eq 'POST_CREATE') {
    # just the repo given in arg-2
    @ARGV = ("gitolite git-config -ev -r $ARGV[1] gitolite-options\\.hook\\. |");
} else {
    # POST_COMPILE, all repos
    @ARGV = ("gitolite list-phy-repos | gitolite git-config -ev -r % gitolite-options\\.hook\\. |");
}

my $driver = $rc{MULTI_HOOK_DRIVER} || "$rc{LOCAL_CODE}/hooks/multi-hook-driver";
# Hook Driver
{
    local $/ = undef;
    my $hook_text = <DATA>;
    _print( $driver, $hook_text );
    chmod 0755, $driver;
}

my %repo_hooks;
while (<>) {
    chomp;
    my ( $repo, $hook, $codes ) = split /\t/, $_;
    $codes ||= '';

    # get the hook name
    $hook =~ s/^gitolite-options\.hook\.//;
    $hook =~ s/\..*//;

    my @codes = split /\s+/, $codes;

    # bail on disallowed hook types (but warn only if @codes is non-empty)
    if ( $repo eq 'gitolite-admin' and $hook eq 'post-update' ) {
        _warn "repo-specific-hooks: ignoring attempts to set post-update hook for the admin repo" if @codes;
        next;
    }
    unless ( $hook =~ /^(pre-receive|post-receive|post-update|pre-auto-gc)$/ ) {
        if (@codes) {
            _warn "repo-specific-hooks: '$hook' is not allowed, ignoring";
            _warn "    (only pre-receive, post-receive, post-update, and pre-auto-gc are allowed)";
        }
        next;
    }

    push @{ $repo_hooks{$repo}{$hook} }, @codes;
}

for my $repo (keys %repo_hooks) {
    for my $hook (keys %{ $repo_hooks{$repo} }) {
        my @codes = @{ $repo_hooks{$repo}{$hook} };

        my $dst = "$repo.git/hooks/$hook";
        unlink( glob("$dst.*") );

        my $counter = "h00";
        foreach my $code (@codes) {
            if ( $code =~ m(^/|\.\.) ) {
                _warn "repo-specific-hooks: double dot or leading slash not allowed in '$code'";
                next;
            }

            my $src = $rc{LOCAL_CODE} . "/hooks/repo-specific/$code";

            # if $code has slashes in it, flatten it for use in $dst, to avoid
            # having to re-create those intermediate sub-directories
            $code =~ s(/)(_)g;
            my $dst = "$repo.git/hooks/$hook.$counter-$code";

            unless ( -x $src ) {
                _warn "repo-specific-hooks: '$src' doesn't exist or is not executable";
                next;
            }
            unlink $dst;
            symlink $src, $dst or _warn "could not symlink '$src' to '$dst'";
            $counter++;

            # no sanity checks for multiple overwrites of the same hook
        }

        unlink $dst;
        symlink $driver, $dst or die "could not symlink '$driver' to '$dst'";
    }
}

__DATA__
#!/bin/sh

# Determine what input the hook needs
# post-update takes args, pre/post-receive take stdin
type=args
stdin=''
[ $0 != hooks/post-update ] && {
    type=stdin
    stdin=`cat`
}

for h in $0.*; do
    [ -x $h ] || continue
    if [ $type = args ]
    then
        $h $@ || { [ $0 = hooks/pre-receive ] && exit 1; }
    else
        echo "$stdin" | $h || { [ $0 = hooks/pre-receive ] && exit 1; }
    fi
done