PhabricatorGarbageCollectorManagementWorkflow.php
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	<?php

	abstract class PhabricatorGarbageCollectorManagementWorkflow
	extends PhabricatorManagementWorkflow {

	protected function getCollector($const) {
	$collectors = PhabricatorGarbageCollector::getAllCollectors();

	$collector_list = array_keys($collectors);
	sort($collector_list);
	$collector_list = implode(', ', $collector_list);

	if (!$const) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify a collector with "%s". Valid collectors are: %s.',
	'--collector',
	$collector_list));
	}

	if (empty($collectors[$const])) {
	throw new PhutilArgumentUsageException(
	pht(
	'No such collector "%s". Choose a valid collector: %s.',
	$const,
	$collector_list));
	}

	return $collectors[$const];
	}

	}