#!/usr/bin/perl

=head1 NAME

jh_classpath - sets classpaths in jar files

=cut

use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;

=head1 SYNOPSIS

B<jh_classpath> [S<I<debhelper options>>]

B<jh_classpath> [S<I<debhelper options>>] [B<-p>I<package>] [B<--classpath=>I<cp>] [S<I<jar [...]>>]

=head1 DESCRIPTION

B<jh_classpath> is a javahelper program that can set the classpath on
jar files for you.

It has two modes of operations.  By default, it will read
F<debian/I<package>.classpath> or F<debian/classpath> and set the
classpath of all jar files listed in that file.  In this mode,
B<jh_classpath> does not accept any non-option arguments.

Alternatively, you can pass B<jh_classpath> a list of jar files
to update.  It will process each of those and set the classpath
of them to that value set by B<--classpath> if passed.  If
B<--classpath> is omitted the environment variable CLASSPATH will
be used instead (rewriting its contents as necessary).  In this
mode, B<jh_classpath> will not read F<debian/I<package>.classpath>
nor F<debian/classpath>.

=head1 FILES

=over 4

=item F<debian/I<package>.classpath>, F<debian/classpath>

Parsed to determine which jar files should be processed for the
given package.  Note that unlike most other debhelper commands,
B<jh_classpath> will use F<debian/classpath> as a fallback
configuration file for I<all> packages that it acts on.  Other
debhelper commands usually only apply this fallback to the
"main package".

The file consists of 0 or more lines with the following:

     jarfile classpath-file1 [... classpath-file2]

Note that each file in the classpath is space-separated in
this configuration file.

=back

=head1 OPTIONS

=over 4

=item B<-c>I<cp>, B<--classpath=>I<cp>

=back

Beyond the above, B<jh_classpath> also accepts the shared
debhelper options documented in L<debhelper(7)>.

=cut

my $classpath_arg;

init(options => {
	'classpath|c=s' => \$classpath_arg,
});


if (@ARGV) {
	# process jars with -c or $CLASSPATH
	my $tmpdir = tmpdir($dh{FIRSTPACKAGE});
	if (not $classpath_arg) {
		$classpath_arg = $ENV{'CLASSPATH'};
		$classpath_arg =~ tr/:/ /;
	}
	if (not $classpath_arg) {
		warning('Could not find a classpath, doing nothing');
		exit(0);
	}
	for my $jar (@ARGV) {
		if (not -f $jar) {
			my $jar_in_tmp = "${tmpdir}/${jar}";
			if (not -f $jar_in_tmp) {
				warning("Cannot find $jar: skipping");
				next;
			}
			$jar = $jar_in_tmp;
			doit('jh_manifest', "-p$dh{FIRSTPACKAGE}", "--classpath=${classpath_arg}", $jar)
		}

	}
} else {
	# read debian/$package.classpath
	foreach my $package (@{$dh{DOPACKAGES}}) {
		my $tmpdir = tmpdir($package);
		my $pkgfile = pkgfile($package, 'classpath');
		if (not $pkgfile and -f 'debian/classpath') {
			$pkgfile = 'debian/classpath';
		}
		next if not $pkgfile;
		my @lines = filedoublearray($pkgfile);
		for my $line (@lines) {
			my ($jar, @classpath_parts) = @{$line};
			my $classpath = join(' ', @classpath_parts);
			if (not -f $jar) {
				my $jar_in_tmp = "${tmpdir}/${jar}";
				if (not -f $jar_in_tmp) {
					warning("Cannot find $jar: skipping");
					next;
				}
				$jar = $jar_in_tmp;
			}
			doit('jh_manifest', "-p$dh{FIRSTPACKAGE}", "--classpath=${classpath}", $jar)
		}
	}
}

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of javahelper and uses debhelper as backend. There are
also tutorials in /usr/share/doc/javahelper.

=head1 AUTHOR

Niels Thykier <niels@thykier.net>

=cut