#!/usr/bin/perl
#
# Write dependency list from Koha PerlDependencies.pm, in Debian format.
#
# Copyright 2010  Catalyst IT, Ltd
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


use strict;
use warnings;

use C4::Installer::PerlDependencies;

my $deps = $C4::Installer::PerlDependencies::PERL_DEPS;

my $prefix = "^/usr/((lib|share)/perl5|(lib|share)/perl/[0-9.]+)";

foreach my $module (keys %$deps) {
    my $ver = $deps->{$module}->{'min_ver'};
    my $subpath = $module;
    $subpath =~ s,::,/,g;
    my $output = 
        qx(apt-file -l -x search "$prefix/$subpath.pm\$");
    my @temp = split(/\n/, $output);
    my @lines = ();
    # Remove packages that are required/essential and always installed on
    # a Debian system. Debian packages should not have unversioned 
    # dependencies on such packages.
    foreach my $line (@temp) {
        if ($line ne "perl-base") {
            @lines = (@lines, $line);
        }
    }
    if (scalar(@lines) == 1 && $lines[0] ne "") {
        my $pkg = $lines[0];
        print "$pkg\n";
    } elsif (scalar(@lines) > 1) {
        foreach my $pkg (@lines) {
            print " | " if ($pkg ne $lines[0]);
            print "$pkg";
        }
        print "\n";
    } elsif (scalar(@temp) != 0) {
        # I'm an Essential and I'm OK,
        # I install all night, and work all day.
        # I chomp up strings. I eat my bugs.
        # I go to the base install.
        # On Fridays I go drinking,
        # and have buttered commits for git.
        # (Beer O'Clock is more than two hours
        # away. I don't even drink beer. There
        # is no reason to be suspicious of this
        # commit.)
        # RM note: suspicious?  me?  always!
    } else {
        print "EEEK: unknown package for $module\n";
    }
}