#!/usr/bin/perl -w

# This script can be used to rename an rpm group. It takes as 1st and
# 2nd argument the old and new group names, and will output on stdout a
# script to do the change.
#
# $ ./rename-rpm-group oldgroup newgroup > rename-group-blabla.sh

use strict;
use URPM;
use MDK::Common;

exit 1 unless @ARGV == 2;
my $oldgrp = $ARGV[0];
my $newgrp = $ARGV[1];

my @mediasdirs = (
    '/distrib/mirror/distrib/cauldron/x86_64/media',
    '/distrib/mirror/distrib/cauldron/i586/media',
    '/distrib/mirror/distrib/cauldron/SRPMS/',
);
my $svnurl = 'svn+ssh://svn.mageia.org/svn/packages/cauldron';

sub get_packages_by_group {
    my ($groupname) = @_;
    my $urpm = URPM->new;

    foreach my $mediasdir (@mediasdirs) {
        foreach (glob("$mediasdir/*/*/media_info/hdlist.cz")) {
            print STDERR "parse hdlist $_\n";
            $urpm->parse_hdlist($_);
        }
    }

    my %res;
    $urpm->traverse_tag('group', [ $groupname ], sub { 
                my $name;
                if ($_[0]->sourcerpm) {
                    $name = $_[0]->sourcerpm;
                    $name =~ s/-([^-]+-[^-]+)$//;
                } else {
                    $name = $_[0]->name;
                }
                $res{$name} = 1;
        });

    keys %res;
}

sub print_update_group_cmd {
    my ($pkgname, $oldgrp, $newgrp) = @_;
    print <<EOF
echo Updating package $pkgname
tmpdir=\$(mktemp -d)
cd \$tmpdir
svn co $svnurl/$pkgname/current/SPECS pkg
cd pkg
sed -i 's:$oldgrp:$newgrp:' *.spec
svn diff
svn ci -m 'Update group: $oldgrp -> $newgrp'
cd /tmp
rm -Rf \$tmpdir

EOF
}

print <<EOF
#!/bin/sh
set -e

EOF
;

foreach (get_packages_by_group($oldgrp)) {
    print_update_group_cmd($_, $oldgrp, $newgrp);
}