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/*
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Copyright 2015 Kyle E. Mitchell
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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var parse = require('spdx-expression-parse')
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var spdxLicenseIds = require('spdx-license-ids')
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function valid (string) {
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try {
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parse(string)
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return true
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} catch (error) {
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return false
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}
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}
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// Common transpositions of license identifier acronyms
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var transpositions = [
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['APGL', 'AGPL'],
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['Gpl', 'GPL'],
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['GLP', 'GPL'],
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['APL', 'Apache'],
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['ISD', 'ISC'],
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['GLP', 'GPL'],
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['IST', 'ISC'],
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['Claude', 'Clause'],
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[' or later', '+'],
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[' International', ''],
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['GNU', 'GPL'],
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['GUN', 'GPL'],
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['+', ''],
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['GNU GPL', 'GPL'],
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['GNU/GPL', 'GPL'],
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['GNU GLP', 'GPL'],
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['GNU General Public License', 'GPL'],
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['Gnu public license', 'GPL'],
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['GNU Public License', 'GPL'],
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['GNU GENERAL PUBLIC LICENSE', 'GPL'],
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['MTI', 'MIT'],
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['Mozilla Public License', 'MPL'],
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['WTH', 'WTF'],
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['-License', '']
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]
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var TRANSPOSED = 0
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var CORRECT = 1
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// Simple corrections to nearly valid identifiers.
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var transforms = [
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// e.g. 'mit'
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function (argument) {
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return argument.toUpperCase()
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},
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// e.g. 'MIT '
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function (argument) {
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return argument.trim()
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},
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// e.g. 'M.I.T.'
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function (argument) {
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return argument.replace(/\./g, '')
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},
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// e.g. 'Apache- 2.0'
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function (argument) {
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return argument.replace(/\s+/g, '')
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},
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// e.g. 'CC BY 4.0''
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function (argument) {
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return argument.replace(/\s+/g, '-')
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},
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// e.g. 'LGPLv2.1'
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function (argument) {
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return argument.replace('v', '-')
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},
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// e.g. 'Apache 2.0'
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function (argument) {
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return argument.replace(/,?\s*(\d)/, '-$1')
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},
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// e.g. 'GPL 2'
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function (argument) {
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return argument.replace(/,?\s*(\d)/, '-$1.0')
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},
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// e.g. 'Apache Version 2.0'
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function (argument) {
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return argument
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.replace(/,?\s*(V\.|v\.|V|v|Version|version)\s*(\d)/, '-$2')
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},
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// e.g. 'Apache Version 2'
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function (argument) {
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return argument
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.replace(/,?\s*(V\.|v\.|V|v|Version|version)\s*(\d)/, '-$2.0')
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},
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// e.g. 'ZLIB'
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function (argument) {
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return argument[0].toUpperCase() + argument.slice(1)
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},
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// e.g. 'MPL/2.0'
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function (argument) {
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return argument.replace('/', '-')
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},
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// e.g. 'Apache 2'
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function (argument) {
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return argument
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.replace(/\s*V\s*(\d)/, '-$1')
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.replace(/(\d)$/, '$1.0')
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},
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// e.g. 'GPL-2.0', 'GPL-3.0'
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function (argument) {
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if (argument.indexOf('3.0') !== -1) {
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return argument + '-or-later'
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} else {
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return argument + '-only'
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}
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},
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// e.g. 'GPL-2.0-'
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function (argument) {
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return argument + 'only'
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},
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// e.g. 'GPL2'
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function (argument) {
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return argument.replace(/(\d)$/, '-$1.0')
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},
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// e.g. 'BSD 3'
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function (argument) {
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return argument.replace(/(-| )?(\d)$/, '-$2-Clause')
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},
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// e.g. 'BSD clause 3'
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function (argument) {
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return argument.replace(/(-| )clause(-| )(\d)/, '-$3-Clause')
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},
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// e.g. 'BY-NC-4.0'
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function (argument) {
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return 'CC-' + argument
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},
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// e.g. 'BY-NC'
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function (argument) {
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return 'CC-' + argument + '-4.0'
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},
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// e.g. 'Attribution-NonCommercial'
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function (argument) {
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return argument
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.replace('Attribution', 'BY')
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.replace('NonCommercial', 'NC')
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.replace('NoDerivatives', 'ND')
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.replace(/ (\d)/, '-$1')
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.replace(/ ?International/, '')
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},
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// e.g. 'Attribution-NonCommercial'
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function (argument) {
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return 'CC-' +
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argument
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.replace('Attribution', 'BY')
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.replace('NonCommercial', 'NC')
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.replace('NoDerivatives', 'ND')
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.replace(/ (\d)/, '-$1')
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.replace(/ ?International/, '') +
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'-4.0'
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}
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]
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var licensesWithVersions = spdxLicenseIds
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.map(function (id) {
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var match = /^(.*)-\d+\.\d+$/.exec(id)
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return match
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? [match[0], match[1]]
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: [id, null]
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})
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.reduce(function (objectMap, item) {
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var key = item[1]
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objectMap[key] = objectMap[key] || []
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objectMap[key].push(item[0])
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return objectMap
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}, {})
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var licensesWithOneVersion = Object.keys(licensesWithVersions)
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.map(function makeEntries (key) {
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return [key, licensesWithVersions[key]]
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})
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.filter(function identifySoleVersions (item) {
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return (
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// Licenses has just one valid version suffix.
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item[1].length === 1 &&
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item[0] !== null &&
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// APL will be considered Apache, rather than APL-1.0
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item[0] !== 'APL'
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)
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})
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.map(function createLastResorts (item) {
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return [item[0], item[1][0]]
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})
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licensesWithVersions = undefined
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// If all else fails, guess that strings containing certain substrings
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// meant to identify certain licenses.
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var lastResorts = [
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['UNLI', 'Unlicense'],
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['WTF', 'WTFPL'],
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['2 CLAUSE', 'BSD-2-Clause'],
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['2-CLAUSE', 'BSD-2-Clause'],
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['3 CLAUSE', 'BSD-3-Clause'],
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['3-CLAUSE', 'BSD-3-Clause'],
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['AFFERO', 'AGPL-3.0-or-later'],
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['AGPL', 'AGPL-3.0-or-later'],
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['APACHE', 'Apache-2.0'],
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['ARTISTIC', 'Artistic-2.0'],
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['Affero', 'AGPL-3.0-or-later'],
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['BEER', 'Beerware'],
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['BOOST', 'BSL-1.0'],
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['BSD', 'BSD-2-Clause'],
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['CDDL', 'CDDL-1.1'],
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['ECLIPSE', 'EPL-1.0'],
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['FUCK', 'WTFPL'],
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['GNU', 'GPL-3.0-or-later'],
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['LGPL', 'LGPL-3.0-or-later'],
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['GPLV1', 'GPL-1.0-only'],
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['GPL-1', 'GPL-1.0-only'],
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['GPLV2', 'GPL-2.0-only'],
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['GPL-2', 'GPL-2.0-only'],
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['GPL', 'GPL-3.0-or-later'],
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['MIT +NO-FALSE-ATTRIBS', 'MITNFA'],
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['MIT', 'MIT'],
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['MPL', 'MPL-2.0'],
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['X11', 'X11'],
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['ZLIB', 'Zlib']
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].concat(licensesWithOneVersion)
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var SUBSTRING = 0
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var IDENTIFIER = 1
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var validTransformation = function (identifier) {
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for (var i = 0; i < transforms.length; i++) {
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var transformed = transforms[i](identifier).trim()
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if (transformed !== identifier && valid(transformed)) {
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return transformed
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}
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}
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return null
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}
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var validLastResort = function (identifier) {
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var upperCased = identifier.toUpperCase()
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for (var i = 0; i < lastResorts.length; i++) {
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var lastResort = lastResorts[i]
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if (upperCased.indexOf(lastResort[SUBSTRING]) > -1) {
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return lastResort[IDENTIFIER]
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}
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}
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return null
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}
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var anyCorrection = function (identifier, check) {
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for (var i = 0; i < transpositions.length; i++) {
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var transposition = transpositions[i]
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var transposed = transposition[TRANSPOSED]
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if (identifier.indexOf(transposed) > -1) {
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var corrected = identifier.replace(
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transposed,
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transposition[CORRECT]
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)
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var checked = check(corrected)
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if (checked !== null) {
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return checked
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}
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}
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}
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return null
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}
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module.exports = function (identifier) {
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var validArugment = (
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typeof identifier === 'string' &&
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identifier.trim().length !== 0
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)
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if (!validArugment) {
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throw Error('Invalid argument. Expected non-empty string.')
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}
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identifier = identifier.trim()
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if (valid(identifier)) {
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return upgradeGPLs(identifier)
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}
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var noPlus = identifier.replace(/\+$/, '').trim()
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if (valid(noPlus)) {
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return upgradeGPLs(noPlus)
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}
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var transformed = validTransformation(identifier)
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if (transformed !== null) {
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return upgradeGPLs(transformed)
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}
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transformed = anyCorrection(identifier, function (argument) {
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if (valid(argument)) {
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return argument
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}
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return validTransformation(argument)
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})
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if (transformed !== null) {
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return upgradeGPLs(transformed)
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}
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transformed = validLastResort(identifier)
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if (transformed !== null) {
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return upgradeGPLs(transformed)
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}
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transformed = anyCorrection(identifier, validLastResort)
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if (transformed !== null) {
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return upgradeGPLs(transformed)
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}
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return null
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}
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function upgradeGPLs (value) {
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if ([
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'GPL-1.0', 'LGPL-1.0', 'AGPL-1.0',
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'GPL-2.0', 'LGPL-2.0', 'AGPL-2.0',
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'LGPL-2.1'
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].indexOf(value) !== -1) {
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return value + '-only'
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} else if ([
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'GPL-1.0+', 'GPL-2.0+', 'GPL-3.0+',
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'LGPL-2.0+', 'LGPL-2.1+', 'LGPL-3.0+',
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'AGPL-1.0+', 'AGPL-3.0+'
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].indexOf(value) !== -1) {
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return value.replace(/\+$/, '-or-later')
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} else if (['GPL-3.0', 'LGPL-3.0', 'AGPL-3.0'].indexOf(value) !== -1) {
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return value + '-or-later'
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} else {
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return value
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}
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}
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