#!/usr/bin/perl
# Batch EXecutor 3.0 -- Management of Queues
# (c) 2011-2012 Martin Mares <mj@ucw.cz>

use strict;
use warnings;
use Getopt::Long;
use BEX;

my $init;

sub usage() {
	print <<AMEN ;
Usage: bex qman [<options>] <subcommand>

Subcommands:
init <queue>	Create a new queue
ls		List all queues

Options:
None defined so far.
AMEN
	exit 0;
}

GetOptions(
	"init!" => \$init,
	"help" => \&usage,
) or die "Try `bex qman --help' for more information.\n";

my $op = shift @ARGV // 'ls';

if ($op eq 'init') {
	my $queue_name = shift @ARGV or die "bex qman init requires a queue name\n";
	my $path = $BEX::Config::home . '/' . $queue_name;
	-d $path and die "Queue directory $path already exists\n";
	mkdir $path;
	mkdir "$path/hosts";
	mkdir "$path/jobs";
	print "Queue $queue_name initialized.\n";
} elsif ($op eq 'ls' && @ARGV == 0) {
	opendir D, $BEX::Config::home or die "Cannot read BEX home directory\n";
	for my $q (sort readdir D) {
		next if $q =~ /^\./;
		my $d = $BEX::Config::home . '/' . $q;
		if (-d $d && -d "$d/hosts" && -d "$d/jobs") {
			print "$q\n";
		}
	}
	closedir D;
} else {
	die "Invalid subcommand\n";
}