classes/SPDX.class.inc

<?php
/*******************************************************************************
 * Copyright (c) 2017 Eclipse Foundation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/

use Composer\Spdx\SpdxLicenses;

require_once(dirname(__FILE__) . '/spdx-licenses/src/SpdxLicenses.php');


class SPDX {
 static $SpdxLicenses;

 private static function getSpdxLicenses() {
  if (!self::$SpdxLicenses)
   self::$SpdxLicenses = new SpdxLicenses();
  return self::$SpdxLicenses;
 }

 /**
  * Normalize the license text into an SPDX expression if possible.
  *
  * We have lots of old data that expresses licenses in various
  * forms. This function tries to make sense of the form to express
  * what's there in SPDX format.
  *
  * @param string $text
  * @return string
  */
 static function asSpdx($text) {

//   if ($spdx = self::getSpdxLicenses()->getIdentifierByName($text))
//    return $spdx;

  $replacements = array(
    '/ASL/' => 'Apache-2.0',
    '/Apache 1\.1/i' => 'Apache-1.1',
    '/Apache License,? 2\.0/i' => 'Apache-2.0',
    '/Apache Software License 1\.1/' => 'Apache-1.1',
    '/New BSD License/i' => 'BSD-2-Clause',
    '/Common Development and Distribution License(?=,|$)/i' => 'CDDL-1.0',
    '/Common Development and Distribution License 1\.0/i' => 'CDDL-1.0',
    '/Common Development and Distribution License 1\.1/i' => 'CDDL-1.1',
    '/Creative Commons Attribution(?: License)? (\d\.\d)(?: unported)?(?: international)?/i' => 'CC-BY-\1',
    '/Common Public License 1\.0/i' => 'CPL-1.0',
    '/Eclipse Public License(?=,|$)/i' => 'EPL-1.0',
    '/Eclipse Public License v?1\.0/i' => 'EPL-1.0',
    '/MIT License/i' => 'MIT',
    '/Mozilla Public License 1\.1/i' => 'MPL-1.1',
    '/Mozilla Public License 2\.0/i' => 'MPL-2.0',
    '/Public[\s-_]Domain/i' => 'LicenseRef-Public-Domain',
    '/SIL OPEN FONT LICENSE \(OFL-1\.1\)/i' => 'OFL-1.1',
    '/W3C License/' => 'W3C'
  );

  $licenses = preg_replace(array_keys($replacements), array_values($replacements), trim($text));
  $licenses = preg_replace('/\s*\([^\)]*\)\s*/', '', $licenses);

  $spdx = implode(' OR ', preg_split('/\s*,\s*/', $licenses));

  if (self::getSpdxLicenses()->validate($spdx)) return $spdx;
  return null;
 }
}
?>