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#!/usr/bin/perl
=encoding UTF-8
=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;
our $VERSION = DH_BUILTIN_VERSION;
=head1 SYNOPSIS
B<dh_usrlocal> [S<I<debhelper options>>] [B<-n>]
=head1 DESCRIPTION
B<dh_usrlocal> is a debhelper program that can be used for building packages
that will provide a subdirectory in F</usr/local> when installed.
It finds subdirectories of F<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. These
snippets are inserted into the maintainer scripts by B<dh_installdeb>. See
L<dh_installdeb(1)> for an explanation of debhelper maintainer script
snippets.
When the I<DEB_RULES_REQUIRES_ROOT> environment variable is not (effectively)
I<binary-targets>, the directories in F</usr/local> will be handled as if
they were owned by root:root (see below).
When the I<DEB_RULES_REQUIRES_ROOT> environment variable has an effective value of
I<binary-targets>, the owners, groups and permissions will be
preserved with the sole exception where the directory is owned by root:root.
If a directory is owned by root:root, then ownership will be determined
at install time. The ownership and permission bits will either be root:root
mode 0755 or root:staff mode 02775. The actual choice depends on whether
the system has F</etc/staff-group-for-usr-local> (as documented in the Debian
Policy Manual ยง9.1.2 since version 4.1.4)
=head1 OPTIONS
=over 4
=item B<-n>, B<--no-scripts>
Do not modify F<postinst>/F<prerm> 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.
=head1 CONFORMS TO
Debian policy, version 2.2
=cut
init();
# PROMISE: DH NOOP WITHOUT tmp(usr/local) cli-options()
foreach my $package (@{$dh{DOPACKAGES}}) {
my $tmp = tmpdir($package);
if (-d "$tmp/usr/local") {
my (@dirs, @justdirs);
find({no_chdir => 1,
preprocess => sub {
# Ensure a reproducible traversal.
return sort @_;
},
postprocess => sub {
# Uninstall, unless a direct child of /usr/local.
$_ = $File::Find::dir;
s!^\Q$tmp\E!!;
push @justdirs, $_ if m!/usr/local/.*/!;
# Remove a directory after its childs.
doit('rmdir', $File::Find::dir);
},
wanted => sub {
# rmdir would fail later anyways.
error("${File::Find::name} is not a directory")
if not -d $File::Find::name;
# Install directory before its childs.
my $fn = $File::Find::name;
$fn =~ s!^\Q$tmp\E!!;
return if $fn eq '/usr/local';
# Detect some obvious cases of "this will not end
# well". We rely on what "while read dir ... ; do"
# can handle for correctness.
if ($fn =~ m{[\s!'"\$()*#;<>?@\[\]\\`|]}) {
error("Cannot generate a correct shell script for $fn due to shell metacharacters");
}
if (should_use_root()) {
my $stat = stat $File::Find::dir;
if ($stat->uid == 0 && $stat->gid == 0) {
# Figure out the ownership and permission at runtime
# (required by Policy 9.1.2)
push(@dirs, "$fn default");
} else {
my $user = getpwuid $stat->uid;
my $group = getgrgid $stat->gid;
my $mode = sprintf "%04lo", ($stat->mode & 07777);
push @dirs, "$fn $mode $user $group";
}
} else {
# Figure out the ownership and permission at runtime
# (required by Policy 9.1.2)
push(@dirs, "$fn default");
}
}}, "$tmp/usr/local");
if (! $dh{NOSCRIPTS}) {
autoscript($package,"postinst", "postinst-usrlocal",
{ 'DIRS' => join ("\n", @dirs)}) if @dirs;
autoscript($package,"prerm", "prerm-usrlocal",
{ 'JUSTDIRS' => join ("\n", @justdirs)}) if @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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