#!/usr/bin/perl
# SYNTAX:
#	build_perl_modules -d dest_dir [-c] [-m] [-t] [-i] tarball_dir
#
# DESCRIPTION:
#	Installs perl modules found in tarball_dir
#	Expects a file called install_order, containing one line per distribution name
#	Will take action against each distribution in turn
#	-d is a necessary destination directory for the perl mods
#	If -c is set, will remove the module build directories and exit
#	If -m is set, will run perl Makefile.PL and make
#	If -t is set, will run make test
#	If -i is set, will run make install
#	Options are discrete. This is because an overall ./configure, make, make test, make install
#	are run in different invocations. Obviously, you can't run a -t without a -m, but there's no
#	checking here for that

# Can only use base modules
use warnings;
use strict;
use Config;
use Getopt::Std;
use Cwd;
use File::Path;

my $opts = {};
getopts('d:cmti', $opts) || die "Invalid options";
my $moddir = shift @ARGV or die "Must specify a directory where tarballs exist";

my $destdir = $opts->{d};
die "Must set a destination directory" unless $destdir;

chdir $moddir or die "Cannot change to $moddir";
open F, "install_order" or die "Cannot open install_order file";
my @files = grep { ! /^#/ && chop } <F>;
close F;

my @tarballs;
foreach my $f (@files) {
	# Needs to be better. Also, what if there are two with same name?
	my $tarball;
	eval '$tarball = <'."$f".'*.tar.gz>';
	die unless ($tarball);
	print "Got $f, with file: $tarball",$/;
	push @tarballs, $tarball;
	(my $dir = $tarball) =~ s/\.tar.gz//;
	# Need to do cleaning before doing each module in turn
	if ($opts->{c}) {
		print "Cleaning $dir",$/;
		rmtree($dir);
	}
}

if ($opts->{c}) {
	print "Finished cleaning",$/;
	exit;
}

my $topdir = cwd();
foreach my $tarball (@tarballs) {
	(my $dir = $tarball) =~ s/\.tar.gz//;
	if ($opts->{m}) {
		# Don't compile if already done - this is because of invocating this
		# script at different stages
		unless (-e $dir) {
			system("gunzip -c $tarball | tar -xf -") == 0 or die "Cannot extract $tarball";
			chdir $dir or die "Can't chdir into $dir";
			system("perl Makefile.PL PREFIX=$destdir INSTALLDIRS=site LIB=$destdir/lib") == 0 or die "Can't run perl Makefile.PL";
			system("make") == 0 or die "Can't run make";
			chdir $topdir or die "Can't chdir to top";;
		}
	}

	chdir $dir or die "Can't chdir into $dir";

	# Need to add this so this module is found for subsequent ones
	my @dirs = split(":", $ENV{PERL5LIB} || "");
	unshift @dirs, "$topdir/$dir/blib/lib";
	$ENV{PERL5LIB}=join(":", @dirs);

	if ($opts->{t}) {
		system("make test") == 0 or die "Can't run make test failed";
	}
	if ($opts->{i}) {
		system("make install SITEPREFIX=$destdir") == 0 or die "Can't run make install";
	}
	chdir $topdir or die "Can't go back to $topdir";
}