--- /dev/null
+/*
+Copyright spdx-correct.js contributors
+
+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.
+*/
+var parse = require('spdx-expression-parse')
+var spdxLicenseIds = require('spdx-license-ids')
+
+function valid (string) {
+ try {
+ parse(string)
+ return true
+ } catch (error) {
+ return false
+ }
+}
+
+// Common transpositions of license identifier acronyms
+var transpositions = [
+ ['APGL', 'AGPL'],
+ ['Gpl', 'GPL'],
+ ['GLP', 'GPL'],
+ ['APL', 'Apache'],
+ ['ISD', 'ISC'],
+ ['GLP', 'GPL'],
+ ['IST', 'ISC'],
+ ['Claude', 'Clause'],
+ [' or later', '+'],
+ [' International', ''],
+ ['GNU', 'GPL'],
+ ['GUN', 'GPL'],
+ ['+', ''],
+ ['GNU GPL', 'GPL'],
+ ['GNU/GPL', 'GPL'],
+ ['GNU GLP', 'GPL'],
+ ['GNU General Public License', 'GPL'],
+ ['Gnu public license', 'GPL'],
+ ['GNU Public License', 'GPL'],
+ ['GNU GENERAL PUBLIC LICENSE', 'GPL'],
+ ['MTI', 'MIT'],
+ ['Mozilla Public License', 'MPL'],
+ ['Universal Permissive License', 'UPL'],
+ ['WTH', 'WTF'],
+ ['-License', '']
+]
+
+var TRANSPOSED = 0
+var CORRECT = 1
+
+// Simple corrections to nearly valid identifiers.
+var transforms = [
+ // e.g. 'mit'
+ function (argument) {
+ return argument.toUpperCase()
+ },
+ // e.g. 'MIT '
+ function (argument) {
+ return argument.trim()
+ },
+ // e.g. 'M.I.T.'
+ function (argument) {
+ return argument.replace(/\./g, '')
+ },
+ // e.g. 'Apache- 2.0'
+ function (argument) {
+ return argument.replace(/\s+/g, '')
+ },
+ // e.g. 'CC BY 4.0''
+ function (argument) {
+ return argument.replace(/\s+/g, '-')
+ },
+ // e.g. 'LGPLv2.1'
+ function (argument) {
+ return argument.replace('v', '-')
+ },
+ // e.g. 'Apache 2.0'
+ function (argument) {
+ return argument.replace(/,?\s*(\d)/, '-$1')
+ },
+ // e.g. 'GPL 2'
+ function (argument) {
+ return argument.replace(/,?\s*(\d)/, '-$1.0')
+ },
+ // e.g. 'Apache Version 2.0'
+ function (argument) {
+ return argument
+ .replace(/,?\s*(V\.|v\.|V|v|Version|version)\s*(\d)/, '-$2')
+ },
+ // e.g. 'Apache Version 2'
+ function (argument) {
+ return argument
+ .replace(/,?\s*(V\.|v\.|V|v|Version|version)\s*(\d)/, '-$2.0')
+ },
+ // e.g. 'ZLIB'
+ function (argument) {
+ return argument[0].toUpperCase() + argument.slice(1)
+ },
+ // e.g. 'MPL/2.0'
+ function (argument) {
+ return argument.replace('/', '-')
+ },
+ // e.g. 'Apache 2'
+ function (argument) {
+ return argument
+ .replace(/\s*V\s*(\d)/, '-$1')
+ .replace(/(\d)$/, '$1.0')
+ },
+ // e.g. 'GPL-2.0', 'GPL-3.0'
+ function (argument) {
+ if (argument.indexOf('3.0') !== -1) {
+ return argument + '-or-later'
+ } else {
+ return argument + '-only'
+ }
+ },
+ // e.g. 'GPL-2.0-'
+ function (argument) {
+ return argument + 'only'
+ },
+ // e.g. 'GPL2'
+ function (argument) {
+ return argument.replace(/(\d)$/, '-$1.0')
+ },
+ // e.g. 'BSD 3'
+ function (argument) {
+ return argument.replace(/(-| )?(\d)$/, '-$2-Clause')
+ },
+ // e.g. 'BSD clause 3'
+ function (argument) {
+ return argument.replace(/(-| )clause(-| )(\d)/, '-$3-Clause')
+ },
+ // e.g. 'New BSD license'
+ function (argument) {
+ return argument.replace(/\b(Modified|New|Revised)(-| )?BSD((-| )License)?/i, 'BSD-3-Clause')
+ },
+ // e.g. 'Simplified BSD license'
+ function (argument) {
+ return argument.replace(/\bSimplified(-| )?BSD((-| )License)?/i, 'BSD-2-Clause')
+ },
+ // e.g. 'Free BSD license'
+ function (argument) {
+ return argument.replace(/\b(Free|Net)(-| )?BSD((-| )License)?/i, 'BSD-2-Clause-$1BSD')
+ },
+ // e.g. 'Clear BSD license'
+ function (argument) {
+ return argument.replace(/\bClear(-| )?BSD((-| )License)?/i, 'BSD-3-Clause-Clear')
+ },
+ // e.g. 'Old BSD License'
+ function (argument) {
+ return argument.replace(/\b(Old|Original)(-| )?BSD((-| )License)?/i, 'BSD-4-Clause')
+ },
+ // e.g. 'BY-NC-4.0'
+ function (argument) {
+ return 'CC-' + argument
+ },
+ // e.g. 'BY-NC'
+ function (argument) {
+ return 'CC-' + argument + '-4.0'
+ },
+ // e.g. 'Attribution-NonCommercial'
+ function (argument) {
+ return argument
+ .replace('Attribution', 'BY')
+ .replace('NonCommercial', 'NC')
+ .replace('NoDerivatives', 'ND')
+ .replace(/ (\d)/, '-$1')
+ .replace(/ ?International/, '')
+ },
+ // e.g. 'Attribution-NonCommercial'
+ function (argument) {
+ return 'CC-' +
+ argument
+ .replace('Attribution', 'BY')
+ .replace('NonCommercial', 'NC')
+ .replace('NoDerivatives', 'ND')
+ .replace(/ (\d)/, '-$1')
+ .replace(/ ?International/, '') +
+ '-4.0'
+ }
+]
+
+var licensesWithVersions = spdxLicenseIds
+ .map(function (id) {
+ var match = /^(.*)-\d+\.\d+$/.exec(id)
+ return match
+ ? [match[0], match[1]]
+ : [id, null]
+ })
+ .reduce(function (objectMap, item) {
+ var key = item[1]
+ objectMap[key] = objectMap[key] || []
+ objectMap[key].push(item[0])
+ return objectMap
+ }, {})
+
+var licensesWithOneVersion = Object.keys(licensesWithVersions)
+ .map(function makeEntries (key) {
+ return [key, licensesWithVersions[key]]
+ })
+ .filter(function identifySoleVersions (item) {
+ return (
+ // Licenses has just one valid version suffix.
+ item[1].length === 1 &&
+ item[0] !== null &&
+ // APL will be considered Apache, rather than APL-1.0
+ item[0] !== 'APL'
+ )
+ })
+ .map(function createLastResorts (item) {
+ return [item[0], item[1][0]]
+ })
+
+licensesWithVersions = undefined
+
+// If all else fails, guess that strings containing certain substrings
+// meant to identify certain licenses.
+var lastResorts = [
+ ['UNLI', 'Unlicense'],
+ ['WTF', 'WTFPL'],
+ ['2 CLAUSE', 'BSD-2-Clause'],
+ ['2-CLAUSE', 'BSD-2-Clause'],
+ ['3 CLAUSE', 'BSD-3-Clause'],
+ ['3-CLAUSE', 'BSD-3-Clause'],
+ ['AFFERO', 'AGPL-3.0-or-later'],
+ ['AGPL', 'AGPL-3.0-or-later'],
+ ['APACHE', 'Apache-2.0'],
+ ['ARTISTIC', 'Artistic-2.0'],
+ ['Affero', 'AGPL-3.0-or-later'],
+ ['BEER', 'Beerware'],
+ ['BOOST', 'BSL-1.0'],
+ ['BSD', 'BSD-2-Clause'],
+ ['CDDL', 'CDDL-1.1'],
+ ['ECLIPSE', 'EPL-1.0'],
+ ['FUCK', 'WTFPL'],
+ ['GNU', 'GPL-3.0-or-later'],
+ ['LGPL', 'LGPL-3.0-or-later'],
+ ['GPLV1', 'GPL-1.0-only'],
+ ['GPL-1', 'GPL-1.0-only'],
+ ['GPLV2', 'GPL-2.0-only'],
+ ['GPL-2', 'GPL-2.0-only'],
+ ['GPL', 'GPL-3.0-or-later'],
+ ['MIT +NO-FALSE-ATTRIBS', 'MITNFA'],
+ ['MIT', 'MIT'],
+ ['MPL', 'MPL-2.0'],
+ ['X11', 'X11'],
+ ['ZLIB', 'Zlib']
+].concat(licensesWithOneVersion)
+
+var SUBSTRING = 0
+var IDENTIFIER = 1
+
+var validTransformation = function (identifier) {
+ for (var i = 0; i < transforms.length; i++) {
+ var transformed = transforms[i](identifier).trim()
+ if (transformed !== identifier && valid(transformed)) {
+ return transformed
+ }
+ }
+ return null
+}
+
+var validLastResort = function (identifier) {
+ var upperCased = identifier.toUpperCase()
+ for (var i = 0; i < lastResorts.length; i++) {
+ var lastResort = lastResorts[i]
+ if (upperCased.indexOf(lastResort[SUBSTRING]) > -1) {
+ return lastResort[IDENTIFIER]
+ }
+ }
+ return null
+}
+
+var anyCorrection = function (identifier, check) {
+ for (var i = 0; i < transpositions.length; i++) {
+ var transposition = transpositions[i]
+ var transposed = transposition[TRANSPOSED]
+ if (identifier.indexOf(transposed) > -1) {
+ var corrected = identifier.replace(
+ transposed,
+ transposition[CORRECT]
+ )
+ var checked = check(corrected)
+ if (checked !== null) {
+ return checked
+ }
+ }
+ }
+ return null
+}
+
+module.exports = function (identifier, options) {
+ options = options || {}
+ var upgrade = options.upgrade === undefined ? true : !!options.upgrade
+ function postprocess (value) {
+ return upgrade ? upgradeGPLs(value) : value
+ }
+ var validArugment = (
+ typeof identifier === 'string' &&
+ identifier.trim().length !== 0
+ )
+ if (!validArugment) {
+ throw Error('Invalid argument. Expected non-empty string.')
+ }
+ identifier = identifier.trim()
+ if (valid(identifier)) {
+ return postprocess(identifier)
+ }
+ var noPlus = identifier.replace(/\+$/, '').trim()
+ if (valid(noPlus)) {
+ return postprocess(noPlus)
+ }
+ var transformed = validTransformation(identifier)
+ if (transformed !== null) {
+ return postprocess(transformed)
+ }
+ transformed = anyCorrection(identifier, function (argument) {
+ if (valid(argument)) {
+ return argument
+ }
+ return validTransformation(argument)
+ })
+ if (transformed !== null) {
+ return postprocess(transformed)
+ }
+ transformed = validLastResort(identifier)
+ if (transformed !== null) {
+ return postprocess(transformed)
+ }
+ transformed = anyCorrection(identifier, validLastResort)
+ if (transformed !== null) {
+ return postprocess(transformed)
+ }
+ return null
+}
+
+function upgradeGPLs (value) {
+ if ([
+ 'GPL-1.0', 'LGPL-1.0', 'AGPL-1.0',
+ 'GPL-2.0', 'LGPL-2.0', 'AGPL-2.0',
+ 'LGPL-2.1'
+ ].indexOf(value) !== -1) {
+ return value + '-only'
+ } else if ([
+ 'GPL-1.0+', 'GPL-2.0+', 'GPL-3.0+',
+ 'LGPL-2.0+', 'LGPL-2.1+', 'LGPL-3.0+',
+ 'AGPL-1.0+', 'AGPL-3.0+'
+ ].indexOf(value) !== -1) {
+ return value.replace(/\+$/, '-or-later')
+ } else if (['GPL-3.0', 'LGPL-3.0', 'AGPL-3.0'].indexOf(value) !== -1) {
+ return value + '-or-later'
+ } else {
+ return value
+ }
+}
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