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#!/usr/bin/perl
=head1 NAME
dh_usrlocal - migrate usr/local directories to maintainer scripts
=cut
use warnings;
use strict;
use Debian::Debhelper::Dh_Lib;
use File::Find;
use File::stat;
=head1 SYNOPSIS
B<dh_usrlocal> [S<I<debhelper options>>] [B<-n>]
=head1 DESCRIPTION
dh_usrlocal is a debhelper program that can be used for building packages
that will provide a subdirectory in /usr/local when installed.
It finds subdirectories of usr/local in the package build directory, and
removes them, replacing them with maintainer script snippets (unless B<-n>
is used) to create the directories at install time, and remove them when
the package is removed, in a manner compliant with Debian policy. See
L<dh_installdeb(1)> for an explanation of Debhelper maintainer script
snippets.
If the directories found in the build tree have unusual owners, groups, or
permissions, then those values will be preserved in the directories made by
the postinst script. However, as a special exception, if a directory is owned
by root.root, it will be treated as if it is owned by root.staff and is mode
2775. This is useful, since that is the group and mode policy recommends for
directories in /usr/local.
=head1 OPTIONS
=over 4
=item B<-n>, B<--noscripts>
Do not modify F<postinst>/F<prerm> scripts.
=back
=head1 NOTES
Note that this command is not idempotent. "dh_clean -k" should be called
between invocations of this command. Otherwise, it may cause multiple
instances of the same text to be added to maintainer scripts.
=head1 CONFORMS TO
Debian policy, version 2.2
=cut
init();
foreach my $package (@{$dh{DOPACKAGES}}) {
my $tmp = tmpdir($package);
if (-d "$tmp/usr/local") {
my (@dirs, @justdirs);
find({bydepth => 1,
no_chdir => 1,
wanted => sub {
my $fn = $File::Find::name;
if (-d $fn) {
my $stat = stat $fn;
my $user = getpwuid $stat->uid;
my $group = getgrgid $stat->gid;
my $mode = sprintf "%04lo", ($stat->mode & 07777);
if ($stat->uid == 0 && $stat->gid == 0) {
$group = 'staff';
$mode = '2775';
}
$fn =~ s!^\Q$tmp\E!!;
return if $fn eq '/usr/local';
# @dirs is in parents-first order for dir creation...
unshift @dirs, "$fn $mode $user $group";
# ...whereas @justdirs is depth-first for removal.
push @justdirs, $fn;
doit("rmdir $_");
}
else {
warning("$fn is not a directory");
}
}}, "$tmp/usr/local");
doit("rmdir $tmp/usr/local");
my $bs = "\\"; # A single plain backslash
my $ebs = $bs x 2; # Escape the backslash from the shell
# This constructs the body of a 'sed' c\ expression which
# is parsed by the shell in double-quotes
my $dirs = join("$ebs\n", @dirs);
pop @justdirs; # don't remove directories directly in /usr/local
my $justdirs = join("$ebs\n", @justdirs);
if (! $dh{NOSCRIPTS}) {
autoscript($package,"postinst", "postinst-usrlocal",
"/#DIRS#/ c${ebs}\n${dirs}");
autoscript($package,"prerm", "prerm-usrlocal",
"/#JUSTDIRS#/ c${ebs}\n${justdirs}") if length $justdirs;
}
}
}
=head1 SEE ALSO
L<debhelper(7)>
This program is a part of debhelper.
=head1 AUTHOR
Andrew Stribblehill <ads@debian.org>
=cut
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