#!/usr/bin/perl
# unpack-binpkg-l2 -- maemian unpack script (binary packages level 2)
#
# syntax: unpack-binpkg-l <base-dir>

# Copyright (C) 1998 Christian Schwarz and Richard Braakman
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, you can find it on the World Wide
# Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.

use strict;
use vars qw($verbose);

($#ARGV == 0) or fail("syntax: unpack-binpkg-l2 <base-dir>");
my $base_dir = shift;

use lib "$ENV{'MAEMIAN_ROOT'}/lib";
use Maemian::Command qw(spawn);
use Util;

print "N: Unpacking binary packages in directory $base_dir ...\n" if $verbose;
mkdir("$base_dir/unpacked", 0777) or fail();

# avoid using dpkg-deb -x; this pipeline is far faster.  I got a factor 2
# improvement on large debs, and factor 1.5 on small debs.  I heard
# it's because dpkg-deb syncs while writing.  -- Richard

spawn({ fail => 'error', err => "$base_dir/unpacked-errors" },
      ['dpkg-deb', '--fsys-tarfile', "$base_dir/deb"],
      '|', ['tar', 'xf', '-', '-C', "$base_dir/unpacked"]);

# fix permissions
spawn({ fail => 'error' },
      ['chmod', '-R', 'u+rwX,go-w', "$base_dir/unpacked"]);