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|
#!/usr/bin/perl -w
=head1 NAME
dh_perl - calculates perl dependencies and cleans up after MakeMaker
=cut
use strict;
use Config;
use File::Find;
use Debian::Debhelper::Dh_Lib;
=head1 SYNOPSIS
B<dh_perl> [S<I<debhelper options>>] [B<-d>] [S<I<library dirs ...>>]
=head1 DESCRIPTION
dh_perl is a debhelper program that is responsible for generating
the ${perl:Depends} substitutions and adding them to substvars files.
The program will look at perl scripts and modules in your package,
and will use this information to generate a dependency on perl or
perlapi. The dependency will be substituted into your package's control
file wherever you place the token "${perl:Depends}".
dh_perl also cleans up empty directories that MakeMaker can generate when
installing perl modules.
=head1 OPTIONS
=over 4
=item B<-d>
In some specific cases you may want to depend on perl-base rather than the
full perl package. If so, you can pass the -d option to make dh_perl generate
a dependency on the correct base package. This is only necessary for some
packages that are included in the base system.
Note that this flag may cause no dependency on perl-base to be generated at
all. perl-base is Essential, so its dependency can be left out, unless a
versioned dependency is needed.
=item B<-V>
By default, scripts and architecture independent modules don't depend
on any specific version of perl. The -V option causes the current
version of the perl (or perl-base with -d) package to be specified.
=item I<library dirs>
If your package installs perl modules in non-standard
directories, you can make dh_perl check those directories by passing their
names on the command line. It will only check the vendorlib and vendorarch
directories by default.
=back
=head1 CONFORMS TO
Debian policy, version 3.8.3
Perl policy, version 1.20
=cut
init();
my $vendorlib = substr $Config{vendorlib}, 1;
my $vendorarch = substr $Config{vendorarch}, 1;
# Cleaning the paths given on the command line
foreach (@ARGV) {
s#/$##;
s#^/##;
}
my $perl = 'perl';
# If -d is given, then the dependency is on perl-base rather than perl.
$perl .= '-base' if $dh{D_FLAG};
my $version;
# dependency types
use constant PROGRAM => 1;
use constant PM_MODULE => 2;
use constant XS_MODULE => 4;
foreach my $package (@{$dh{DOPACKAGES}}) {
my $tmp=tmpdir($package);
delsubstvar($package, "perl:Depends"); # for idempotency
# Check also for alternate locations given on the command line
my @dirs = grep -d, map "$tmp/$_", $vendorlib, $vendorarch, @ARGV;
# Look for perl modules and check where they are installed
my $deps = 0;
find sub {
return unless -f;
$deps |= PM_MODULE if /\.pm$/;
$deps |= XS_MODULE if /\.so$/;
}, @dirs if @dirs;
# find scripts
find sub {
return unless -f and (-x or /\.pl$/);
return if $File::Find::dir=~/\/usr\/share\/doc\//;
local *F;
return unless open F, $_;
if (read F, local $_, 32 and m%^#!\s*(/usr/bin/perl|/usr/bin/env\s+perl)\s%) {
$deps |= PROGRAM;
}
close F;
}, $tmp;
if ($deps) {
my $version="";
if ($deps & XS_MODULE or $dh{V_FLAG_SET}) {
($version) = `dpkg -s $perl` =~ /^Version:\s*(\S+)/m
unless $version;
$version = ">= $version";
}
# no need to depend on an un-versioned perl-base -- it's
# essential
addsubstvar($package, "perl:Depends", $perl, $version)
unless $perl eq 'perl-base' && ! length($version);
# add perlapi-<ver> for XS modules
addsubstvar($package, "perl:Depends", "perlapi-$Config{version}")
if $deps & XS_MODULE;
}
# MakeMaker always makes lib and share dirs, but typically
# only one directory is installed into.
foreach my $dir ("$tmp/usr/share/perl5", "$tmp/usr/lib/perl5") {
if (-d $dir) {
doit("rmdir", "--ignore-fail-on-non-empty", "--parents",
"$dir");
}
}
}
=head1 SEE ALSO
L<debhelper(7)>
This program is a part of debhelper.
=head1 AUTHOR
Brendan O'Dea <bod@debian.org>
=cut
|
