#!/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;

use lib "$ENV{'LINTIAN_ROOT'}/lib/";
use Util qw(fail);

my ($pkg, undef, $dir) = @ARGV;

# Sanity check
unless ( -d "$dir/unpacked/") {
    fail "java-info called with the wrong dir argument!";
}

open INDEX, '<', "$dir/index"
    or fail "cannot open index: $!";

open OUT, '>', "$dir/java-info"
    or fail "cannot open java-info: $!";

chdir ("$dir/unpacked")
    or fail "unable to chdir to unpacked: $!";

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

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