PhabricatorSQLPatchList.php
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	<?php

	/*
	* Copyright 2011 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	final class PhabricatorSQLPatchList {

	public static function getPatchList() {
	$root = dirname(phutil_get_library_root('phabricator'));

	// Find the patch files
	$patches_dir = $root.'/resources/sql/patches/';
	$finder = new FileFinder($patches_dir);
	$results = $finder->find();

	$patches = array();
	foreach ($results as $path) {
	$matches = array();
	if (!preg_match('/(\d+)\..*\.(sql\|php)$/', $path, $matches)) {
	continue;
	}
	$patches[] = array(
	'version' => (int)$matches[1],
	'path' => $patches_dir.$path,
	);
	}

	// Files are in some 'random' order returned by the operating system
	// We need to apply them in proper order
	$patches = isort($patches, 'version');

	return $patches;
	}

	public static function getExpectedSchemaVersion() {
	$patches = self::getPatchList();
	$versions = ipull($patches, 'version');
	$max_version = max($versions);
	return $max_version;
	}

	}