#!/usr/bin/perl

use strict;
use packdrake;

#- general information.
my $default_size = 400000;
my $default_ratio = 6;

sub usage () {
    eval {
	require Pod::Usage;
	Pod::Usage->import();
	pod2usage({ -verbose => 1 });
    };
    exit 0;
}

my ($file, $mode, $dir, $size, $method, $compress, $uncompress, $ratio, $quiet);
my @nextargv = (\$file);
my @list;

#- some quite useful error message.
my $error_mode = "packdrake: choose only --build, --extract, --list or --cat\n";
foreach (@ARGV) {
    /^--help$/       and usage();
    /^--version$/    and do { print "$0 version $packdrake::VERSION\n"; exit 0 };
    /^--build$/      and do { $mode and die $error_mode; $mode = "build"; @nextargv = (\$file); next };
    /^--extract$/    and do { $mode and die $error_mode; $mode = "extract"; @nextargv = (\$file, \$dir); next };
    /^--list$/       and do { $mode and die $error_mode; $mode = "list"; @nextargv = (\$file); next };
    /^--cat$/        and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (\$file); next };
    /^--dir$/        and do { push @nextargv, \$dir; next };
    /^--size$/       and do { push @nextargv, \$size; next };
    /^--method$/     and do { push @nextargv, \$method; next };
    /^--compress$/   and do { push @nextargv, \$compress; next };
    /^--uncompress$/ and do { push @nextargv, \$uncompress; next };
    /^--quiet$/	 and $quiet = 1, next;
    /^-(.*)$/ and do { foreach (split //, $1) {
	    /[1-9]/  and do { $ratio = $_; next };
	    /b/      and do { $mode and die $error_mode; $mode = "build"; @nextargv = (\$file); next };
	    /x/      and do { $mode and die $error_mode; $mode = "extract"; @nextargv = (\$file, \$dir); next };
	    /l/      and do { $mode and die $error_mode; $mode = "list"; @nextargv = (\$file); next };
	    /c/      and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (\$file); next };
	    /d/      and do { push @nextargv, \$dir; next };
	    /s/      and do { push @nextargv, \$size; next };
	    /m/      and do { push @nextargv, \$method; next };
	    die qq(packdrake: unknown option "-$1", check usage with --help\n) } next };
    $mode =~ /extract|list|cat/
	or @nextargv
	or die qq(packdrake: unknown option "$_", check usage with --help\n);
    my $ref = shift @nextargv;
    $ref ? ($$ref = $_) : push @list, $_;
    $mode ||= "list";
}

#- examine and lauch.
$file or die "packdrake: no archive filename given, check usage with --help\n";
$size ||= $default_size;
$ratio ||= $default_ratio;

unless ($method) {
    $file =~ /\.cz$/  and $method = "gzip";
    $file =~ /\.cz2$/ and $method = "bzip2";
}

$compress ||= "$method -$ratio";
$uncompress ||= "$method -d";

$mode =~ /extract/ && !$dir && !@list and ($mode, @list) = ('list', $file);
for ($mode) {
    /build/   and do { packdrake::build_archive(\*STDIN, $dir, $file, $size, $compress, $uncompress); last };
    /extract/ and do {
	my $packer = new packdrake($file, quiet => $quiet);
	$packer->extract_archive($dir, @list);
	last;
    };
    /list/    and do { packdrake::list_archive($file, @list); last };
    /cat/     and do { packdrake::cat_archive($file, @list); last };
    die "packdrake: internal error, unable to select right mode?\n";
}

__END__

=head1 NAME

packdrake - manipulates archives

=head1 SYNOPSIS

    packdrake [options] [--build|-b] file
    packdrake [options] [--extract|-x] file
    packdrake [options] [--list|-l] file
    packdrake [options] [--cat|-c] file

=head1 OPTIONS

=over 2

=item --build file

Build mode; build archive file with filenames given on standard input.
Sub-options are:

=over 4

=item -1 .. -9

Select appropriate compression ratio.

=item --dir srcdir

set source directory where to search files, C<.> by default.

=item --size

Set maximum chunk size, 400000 by default.

=item --method

Select standard compression command method.
Default is deduced from the archive filename (gzip or bzip2).

=item --compress cmd

Select compression command (e.g. C<gzip -9>).

=back

=item --extract file dir file1...fileN

Extracts archive file to specified directory.
Specific files to extract may be given on the command line.

=over 4

=item --uncompress cmd

Select uncompression command.

=back

=item --list file

Lists contents of archive.

=item --cat file

Dumps archive to standard output.

=item General options

=over 4

=item --quiet

Silent mode.

=back

=back

=head1 DESCRIPTION

Packdrake is a simple indexed archive builder and extractor using
standard compression methods.

=head1 SEE ALSO

L<MDV::Packdrakeng>

=head1 COPYRIGHT

Copyright (C) 2000-2005 Mandrakesoft.

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, 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

=cut