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#!/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.
package Lintian::coll::java_info;
no lib '.';
use strict;
use warnings;
use autodie;
use Archive::Zip qw( :ERROR_CODES :CONSTANTS );
use FileHandle;
use lib "$ENV{'LINTIAN_ROOT'}/lib/";
use Lintian::Collect;
use Lintian::Command qw(spawn reap);
use Lintian::Util qw(internal_error rstrip);
sub collect {
my ($pkg, $type, $dir) = @_;
my $info = Lintian::Collect->new($pkg, $type, $dir);
unless (-d "$dir/unpacked/") {
internal_error('java-info called with the wrong dir argument');
}
if (-f "$dir/java-info.gz") {
unlink("$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;
my $open_java_info = sub {
%opts = (
pipe_in => FileHandle->new,
out => "$dir/java-info.gz",
fail => 'error'
);
spawn(\%opts, ['gzip', '-9c']);
$opts{pipe_in}->blocking(1);
};
my $errorhandler = sub {
my ($err) = @_;
$err =~ s/\r?\n/ /g;
rstrip($err);
print {$opts{pipe_in}} "-- ERROR: $err\n";
};
chdir("$dir/unpacked");
# Without this Archive::Zip will emit errors to standard error for
# faulty zip files - but that is not what we want. AFAICT, it is
# the only way to get a textual error as well, so (ab)use it for
# this purpose while we are at it.
my $oldhandler = Archive::Zip::setErrorHandler($errorhandler);
FILE:
foreach my $file ($info->sorted_index) {
next unless $file->is_file;
my $filename = $file->name;
# Wheezy's version of file calls "jar files" for "Zip archive".
# Newer versions seem to call them "Java Jar file".
# Jessie also introduced "Java archive data (JAR)"...
next unless $info->file_info($filename) =~ m/
Java [ ] (?:Jar [ ] file|archive [ ] data)
| Zip [ ] archive
| JAR /xo;
if ($filename =~ m#\S+\.jar$#i) {
my $manifest;
my $azip = Archive::Zip->new;
$open_java_info->() unless %opts;
# This script needs unzip, there's no way around.
print {$opts{pipe_in}} "-- $filename\n";
$azip->read($filename) == AZ_OK or next FILE;
# First, the file list:
foreach my $member ($azip->members) {
my $name = $member->fileName;
my $jversion;
next if $member->isDirectory;
$manifest = $member if $name =~ m@^META-INF/MANIFEST.MF$@oi;
if ($name =~ m/\.class$/o) {
# Collect the Major version of the class file.
my ($contents, $zerr) = $member->contents;
next FILE unless $zerr == AZ_OK;
# translation of the unpack
# NN NN NN NN, nn nn, nn nn - bytes read
# $magic , __ __, $major - variables
my ($magic, undef, $major) = unpack('Nnn', $contents);
$jversion = $major if $magic == 0xCAFEBABE;
}
$jversion //= '-';
print {$opts{pipe_in}} $name, ": $jversion\n";
}
if ($manifest) {
print {$opts{pipe_in}} "-- MANIFEST: $filename\n";
my ($contents, $zerr) = $manifest->contents;
next FILE unless $zerr == AZ_OK;
my $first = 1;
foreach my $line (split m/\n/, $contents) {
$line =~ s/\r//go;
if ($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 $line, 1;
}
}
print {$opts{pipe_in}} "\n" unless $first;
}
}
}
Archive::Zip::setErrorHandler($oldhandler);
if (%opts) {
close($opts{pipe_in});
reap(\%opts);
}
return;
}
collect(@ARGV) if $0 =~ m,(?:^|/)java-info$,;
1;
# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
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