#!/usr/bin/perl -w

=head1 NAME

dh_testversion - ensure that the correct version of debhelper is installed

=cut

use Debian::Debhelper::Dh_Lib;
use Debian::Debhelper::Dh_Version; # contains the version number of debhelper.

=head1 SYNOPSIS

B<dh_testversion> [S<I<debhelper options>>] [I<operator>] [I<version>]

=head1 DESCRIPTION

Note: This program is deprecated. You should use build dependencies
instead.

dh_testversion compares the version of debhelper against the version you
specify, and if the condition is not met, exits with an error message.

You can use this in your debian/rules files if a new debhelper feature is
introduced, and your package requires that feature to build correctly. Use
debhelper's changelog to figure out the version you need.

Be sure not to overuse dh_testversion. If debhelper version 9.5
introduces a new dh_autofixbugs command, and your package uses it, then if
someone tries to build it with debhelper 1.0, the build will fail anyway when
dh_autofixbugs cannot be found, so there is no need for you to use
dh_testversion.

=head1 OPTIONS

=over 4

=item I<operator>

Optional comparison operator used in comparing the versions. If not 
specified, ">=" is used. For descriptions of the comparison operators, see 
dpkg --help.

=item I<version>

Version number to compare against the current version of debhelper. If not
specified, dh_testversion does nothing.

=back

=cut

init();
inhibit_log();

my($compare, $ver);

if ($#ARGV > 0) {
	$compare=shift;
	$ver=shift;
}
elsif ($#ARGV eq 0) {
	$compare=">=";
	$ver=shift;
}

warning("This program is deprecated, you should use build dependencies instead.");

if (defined $compare and defined $ver) {
	warning("Something like: \"Build-Depends: debhelper ($compare $ver)\"");
	system('dpkg','--compare-versions',$Debian::Debhelper::Dh_Version::version,$compare,$ver) == 0 ||
		error("debhelper version $Debian::Debhelper::Dh_Version::version is installed, but a version $compare $ver is needed to build this package.");
}

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut