#!/usr/bin/perl

=head1 NAME

dh_installxfonts - register X fonts

=cut

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

our $VERSION = DH_BUILTIN_VERSION;

=head1 SYNOPSIS

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

=head1 DESCRIPTION

B<dh_installxfonts> is a debhelper program that is responsible for
registering X fonts, so their corresponding F<fonts.dir>, F<fonts.alias>,
and F<fonts.scale> be rebuilt properly at install time.

Before calling this program, you should have installed any X fonts provided
by your package into the appropriate location in the package build
directory, and if you have F<fonts.alias> or F<fonts.scale> files, you should
install them into the correct location under F<etc/X11/fonts> in your
package build directory.

Your package should depend on B<xfonts-utils> so that the
B<update-fonts->I<*> commands are available. (This program adds that dependency to
B<${misc:Depends}>.)

This program automatically generates the F<postinst> and F<postrm> commands needed
to register X fonts. These commands are inserted into the maintainer
scripts by B<dh_installdeb>. See L<dh_installdeb(1)> for an explanation of how
this works.

=head1 NOTES

See L<update-fonts-alias(8)>, L<update-fonts-scale(8)>, and
L<update-fonts-dir(8)> for more information about X font installation.

See Debian policy, section 11.8.5. for details about doing fonts the Debian
way.

=cut

init();

# PROMISE: DH NOOP WITHOUT tmp(usr/share/fonts/X11)

foreach my $package (@{$dh{DOPACKAGES}}) {
	my $tmp=tmpdir($package);

	# Find all font directories in the package build directory.
	my @fontdirs;
	foreach my $parentdir ("$tmp/usr/share/fonts/X11/") {
		opendir(DIR, $parentdir) || next;
		@fontdirs = grep { -d "$parentdir/$_" && !/^\./ } (readdir DIR);
		closedir DIR;
	}

	if (@fontdirs) {
		# Figure out what commands the postinst and postrm will need 
		# to call.
		my @cmds;
		my @cmds_postinst;
		my @cmds_postrm;
		# Sort items for reproducible binary package contents.
		foreach my $f (sort @fontdirs) {
			# This must come before update-fonts-dir.
			push @cmds, "update-fonts-scale $f"
				if -f "$tmp/etc/X11/fonts/$f/$package.scale";
			push @cmds, "update-fonts-dir --x11r7-layout $f";
			if (-f "$tmp/etc/X11/fonts/$f/$package.alias") {
				push @cmds_postinst, "update-fonts-alias --include /etc/X11/fonts/$f/$package.alias $f";
				push @cmds_postrm, "update-fonts-alias --exclude /etc/X11/fonts/$f/$package.alias $f";
			}
		}

		autoscript($package, "postinst", "postinst-xfonts",
			{ 'CMDS' => join(";", @cmds, @cmds_postinst) });
		autoscript($package, "postrm", "postrm-xfonts",
			{ 'CMDS' => join(";", @cmds, @cmds_postrm) });

		if (@cmds_postrm) {
			addsubstvar($package, "misc:Depends", "xfonts-utils", ">= 1:7.5+2");
		} else {
			addsubstvar($package, "misc:Depends", "xfonts-utils");
		}
	}
}

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut