#!/usr/bin/perl -w
# java-info -- lintian collection script

# Copyright (C) 2011 Vincent Fourmond
#
# 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 warnings;

# Sanity check
unless (-d 'unpacked/') {
    print STDERR 'error: collection script called in wrong directory!\n';
    exit 2;
}

open (INDEX, '<', 'index')
    or fail("cannot open index: $!\n");

open (OUT, '>', 'java-info')
    or fail("cannot open java-info: $!\n");

chdir ('unpacked')
    or fail ("unable to chdir to unpacked: $!\n");

while (<INDEX>) {
    chomp;
    $_ = (split(' ', $_, 6))[5];
    next if / -> .*/;		# We skip symlinks.
    if (m#(\S+).jar$#i) {
	my $file = $_;
	my $has_manifest = 0;

	# This script needs unzip, there's no way around.
	print OUT "-- $file\n";

	# First, the file list:
	open FILE_LIST, '-|', 'zipinfo', '-1', $file;
	while(<FILE_LIST>) {
	    $has_manifest = 1 if $_ =~ m@^META-INF/MANIFEST.MF$@oi;
	    next if( m#/$#o);	# Skip directories
	    print OUT;
	}
	close FILE_LIST;

	if($has_manifest) {
	    print OUT "-- MANIFEST: $file\n";

	    open MANIFEST, '-|', 'unzip', '-p', $file, 'META-INF/MANIFEST.MF';
	    my $first = 1;
	    while(my $line = <MANIFEST>) {
		chomp $line;
		$line =~ s/\r//go;
		if($line =~ m/^(\S+:)\s*(.*)/o) {
		    print OUT "\n" unless $first;
		    $first = 0;
		    print OUT "  $1 $2";
		}
		if($line =~ m/^ /o) {
		    print OUT substr $line, 1;
		}
	    }
	    close MANIFEST;
	    print OUT "\n" unless $first;

	}
    }
}

close INDEX;
close OUT or fail("cannot write java-info: $!");

exit 0
