#!/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 Lintian::Collect;
use Lintian::Command qw(spawn reap);
use Lintian::Util qw(fail);

my ($pkg, $type, $dir) = @ARGV;
my $info = Lintian::Collect->new ($pkg, $type, $dir);

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

if ( -f "$dir/java-info" ) {
    unlink "$dir/java-info" or fail "unlink $dir/java-info: $!";
}
if ( -f "$dir/java-info.gz" ) {
    unlink "$dir/java-info.gz" or fail "unlink $dir/java-info.gz: $!";
}

# We lazily start the gzip process to avoid creating the java-info.gz
# file when there are no jar files in the package.
my %opts;

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

foreach my $file (@{ $info->sorted_index }) {
    my $ftype = $info->index->{$file}->{type};
    next unless $ftype eq '-' or $ftype eq 'h';
    if ($file =~ m#\S+\.jar$#i) {
        my $has_manifest = 0;

        open_java_info() unless %opts;
        # This script needs unzip, there's no way around.
        print {$opts{pipe_in}} "-- $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#/$#o);   # Skip directories
            print {$opts{pipe_in}} $_;
        }
        close FILE_LIST;

        if($has_manifest) {
            print {$opts{pipe_in}} "-- 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 {$opts{pipe_in}} "\n" unless $first;
                    $first = 0;
                    print {$opts{pipe_in}} "  $1 $2";
                }
                if($line =~ m/^ /o) {
                    print {$opts{pipe_in}} substr $line, 1;
                }
            }
            close MANIFEST;
            print {$opts{pipe_in}} "\n" unless $first;

        }
    }
}

if (%opts) {
    close $opts{pipe_in} or fail "cannot write java-info.gz: $!";
    reap (\%opts);
}

exit 0;

sub open_java_info {
    %opts = ( pipe_in => FileHandle->new,
              out => "$dir/java-info.gz",
              fail => 'error' );
    spawn(\%opts, ['gzip', '-9c'] );
    $opts{pipe_in}->blocking(1);
}

# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
