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+#!/usr/bin/perl -w
+
+=head1 NAME
+
+dh_installudev - install udev rules files
+
+=cut
+
+use strict;
+use Debian::Debhelper::Dh_Lib;
+use File::Find;
+
+=head1 SYNOPSIS
+
+B<dh_installudev> [S<I<debhelper options>>] [B<-n>] [B<--name=>I<name>] [B<--priority=>I<priority>]
+
+=head1 DESCRIPTION
+
+B<dh_installudev> is a debhelper program that is responsible for
+installing B<udev> rules files.
+
+Code is added to the F<preinst> and F<postinst> to handle the upgrade from the
+old B<udev> rules file location.
+
+=head1 FILES
+
+=over 4
+
+=item debian/I<package>.udev
+
+Installed into F<lib/udev/rules.d/> in the package build directory.
+
+=back
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<--name=>I<name>
+
+When this parameter is used, B<dh_installudev> looks for and
+installs files named debian/I<package>.I<name>.udev instead of the usual
+debian/I<package>.udev.
+
+=item B<--priority=>I<priority>
+
+Sets the priority string of the F<rules.d> symlink. Default is 60.
+
+=item B<-n>, B<--noscripts>
+
+Do not modify F<preinst>/F<postinst> scripts.
+
+=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();
+
+# The priority used to look like z60_;
+# we need to calculate that old value to handle
+# conffile moves correctly.
+my $old_priority=$dh{PRIORITY};
+
+# In case a caller still uses the `z` prefix, remove it.
+if (defined $dh{PRIORITY}) {
+ $dh{PRIORITY}=~s/^z//;
+}
+
+if (! defined $dh{PRIORITY}) {
+ $dh{PRIORITY}="60";
+ $old_priority="z60";
+}
+if ($dh{PRIORITY}) {
+ $dh{PRIORITY}.="-";
+ $old_priority.="_";
+}
+
+# PROMISE: DH NOOP WITHOUT udev
+
+foreach my $package (@{$dh{DOPACKAGES}}) {
+ my $tmp=tmpdir($package);
+ my $rules_file=pkgfile($package,"udev");
+ my $filename=basename($rules_file);
+ if ($filename eq 'udev') {
+ $filename = "$package.udev";
+ }
+ $filename=~s/\.udev$/.rules/;
+ my $oldfilename=$filename;
+ if (defined $dh{NAME}) {
+ $filename="$dh{NAME}.rules";
+ }
+
+ if ($rules_file) {
+ if (! -e "$tmp/lib/udev/rules.d") {
+ doit("install","-d","$tmp/lib/udev/rules.d");
+ }
+ my $rule="/lib/udev/rules.d/$dh{PRIORITY}$filename";
+ doit("install","-m","0644",$rules_file,$tmp.$rule);
+ if (! $dh{NOSCRIPTS}) {
+ # Remove old rule from /etc, unless it's modified,
+ # in which case we rename it to match the new
+ # file in /lib, so it will override.
+ my $old="/etc/udev/rules.d/$old_priority$oldfilename";
+ $rule=~s/^\/lib/\/etc/;
+ autoscript($package,"preinst","preinst-moveconffile","s!#OLD#!$old!g;s!#NEW#!$rule!g;s!#PACKAGE#!$package!g");
+ autoscript($package,"postinst","postinst-moveconffile","s!#OLD#!$old!g;s!#NEW#!$rule!g");
+ }
+ }
+}
+
+=head1 SEE ALSO
+
+L<debhelper(7)>
+
+This program is a part of debhelper.
+
+=head1 AUTHOR
+
+Joey Hess <joeyh@debian.org>
+
+=cut