mozaddon-devel/mozaddondev-getappid

#!/usr/bin/perl -w
#
# authored by Jan Engelhardt, 2011-03-24
# released into the Public Domain
#
use Archive::Zip qw(:ERROR_CODES :CONSTANTS);
use XML::Simple;
&main();

sub get_rdf
{
	my $file = shift @_;

	if ($file eq "install.rdf") {
		return XMLin($file);
	}
	if (substr($file, -4, 4) eq ".xpi") {
		my $zip = Archive::Zip->new();
		if ($zip->read($file) != AZ_OK) {
			die "zip file read error\n";
		}
		my $data = $zip->contents("install.rdf");
		die "missing install.rdf in $file\n" unless $data;
		return XMLin($data);
	}
	die "unsupported file format\n";
}

sub get_desc
{
	my $xml = shift @_;
	my $desc;
	foreach my $tag (keys %$xml) {
		if ($tag !~ m{^(\w+:)?Description$}) {
			next;
		}
		if (ref($xml->{$tag}) eq "ARRAY") {
			return $xml->{$tag};
		}
		return [$xml->{$tag}];
	}
}

sub get_id
{
	my $desc = shift @_;
	my $id;

	foreach (qw(id em:id)) {
		if (exists($desc->{$_})) {
			$id = $desc->{$_};
			last;
		}
	}
	return $id;
}

sub main
{
	my $file = shift @ARGV;
	if (!defined($file)) {
		print "Usage: $0 {install.rdf|something.xpi}\n";
		exit 1;
	}
	my $xml = get_rdf($file);
	if (!defined($xml)) {
		die "xml: $!\n";
	}
	my $desc_list = &get_desc($xml);
	my $id;
	foreach my $one_desc (@$desc_list) {
		my $value = &get_id($one_desc);
		if ($value =~ /\@|{[[:xdigit:]]+-/) {
			if (defined($id)) {
				print STDERR "Warning: multiple IDs/UUIDs!\n";
			}
			$id = $value;
		}
	}
	if (!defined($id)) {
		exit 1;
	}
	print "$id\n";
}