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name : dh_installcatalogs
 #!/usr/bin/perl

=head1 NAME

dh_installcatalogs - install and register SGML Catalogs

=cut

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

our $VERSION = DH_BUILTIN_VERSION;

my $sgmlbasever = "1.28";

=head1 SYNOPSIS

B<dh_installcatalogs> [S<I<debhelper options>>] [B<-n>]

=head1 DESCRIPTION

B<dh_installcatalogs> is a debhelper program that installs and
registers SGML catalogs. It complies with the Debian XML/SGML policy.

Catalogs will be registered in a supercatalog, in
F</etc/sgml/I<package>.cat>.

This command automatically adds maintainer script snippets for
registering and unregistering the catalogs and supercatalogs (unless
B<-n> is used). These snippets are inserted into the maintainer
scripts and the B<triggers> file by B<dh_installdeb>; see
L<dh_installdeb(1)> for an explanation of Debhelper maintainer script
snippets.

A dependency on B<sgml-base> will be added to B<${misc:Depends}>, so be
sure your package uses that variable in F<debian/control>.

=head1 FILES

=over 4

=item debian/I<package>.sgmlcatalogs

Lists the catalogs to be installed per package. Each line in that file
should be of the form C<I<source> I<dest>>, where I<source> indicates where the
catalog resides in the source tree, and I<dest> indicates the destination
location for the catalog under the package build area. I<dest> should
start with F</usr/share/sgml/>.

Supports substitution variables in compat 13 and later as
documented in L<debhelper(7)>.

=back

=head1 OPTIONS

=over 4

=item B<-n>, B<--no-scripts>

Do not modify F<postinst>/F<postrm>/F<prerm> scripts nor add an
activation trigger.

=back

=head1 NOTES

Note that this command is not idempotent. L<dh_prep(1)> should be
called between invocations of this command. Otherwise, it may cause
multiple instances of the same text to be added to maintainer scripts.

=cut

init();

# PROMISE: DH NOOP WITHOUT sgmlcatalogs cli-options()

foreach my $package (@{$dh{DOPACKAGES}}) {
	my $tmpdir = tmpdir($package);
	my $sgmlcatlistfile = pkgfile($package, "sgmlcatalogs");
	my @sgmlinstalled; # catalogs we've installed
	if ($#ARGV >= 0) {
		error("extra command-line arguments");
	}
	if ($sgmlcatlistfile) {
		foreach my $line (filedoublearray($sgmlcatlistfile)) {
			my $source = $line->[0];
			my $dest = $line->[1];
			my $fulldest = "$tmpdir/$dest";
			$fulldest =~ s|//|/|g; # beautification
	
			if (! -d dirname($fulldest)) {
				# Ensure the parent exist
				install_dir($tmpdir."/".dirname($dest));
			}

			install_file($source,$fulldest);

			push(@sgmlinstalled,$dest);
		}
	}
	if (@sgmlinstalled) {
		addsubstvar($package, "misc:Depends", "sgml-base", ">= $sgmlbasever");

		install_dir("$tmpdir/etc/sgml");

		my $centralcat = "/etc/sgml/$package.cat";

		open(my $fd, ">", "$tmpdir$centralcat") || error("failed to write to $tmpdir$centralcat");
		foreach my $sgmldest (@sgmlinstalled) {
			print {$fd} "CATALOG " . $sgmldest . "\n";
		}
		close($fd) or error("close $tmpdir$centralcat: $!");

		if (! $dh{NOSCRIPTS}) {
			autotrigger($package, "activate-await", "update-sgmlcatalog");
			autoscript($package, "postrm", "postrm-sgmlcatalog",
				   { 'CENTRALCAT' => $centralcat });
		}
	}
	else {
		# remove the dependency
		addsubstvar($package, "misc:Depends", "sgml-base", ">= $sgmlbasever", 1);
	}
}

=head1 SEE ALSO

L<debhelper(7)>

F</usr/share/doc/sgml-base-doc/>

=head1 AUTHOR

Adam Di Carlo <aph@debian.org>

=cut
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