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Edit File : semver.js \| Size : 37.89 KB
exports = module.exports = SemVer var debug /* istanbul ignore next / if (typeof process === 'object' && process.env && process.env.NODE_DEBUG && /\bsemver\b/i.test(process.env.NODE_DEBUG)) { debug = function () { var args = Array.prototype.slice.call(arguments, 0) args.unshift('SEMVER') console.log.apply(console, args) } } else { debug = function () {} } // Note: this is the semver.org version of the spec that it implements // Not necessarily the package version of this code. exports.SEMVER_SPEC_VERSION = '2.0.0' var MAX_LENGTH = 256 var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER \|\| / istanbul ignore next / 9007199254740991 // Max safe segment length for coercion. var MAX_SAFE_COMPONENT_LENGTH = 16 // The actual regexps go on exports.re var re = exports.re = [] var src = exports.src = [] var R = 0 // The following Regular Expressions can be used for tokenizing, // validating, and parsing SemVer version strings. // ## Numeric Identifier // A single `0`, or a non-zero digit followed by zero or more digits. var NUMERICIDENTIFIER = R++ src[NUMERICIDENTIFIER] = '0\|[1-9]\\d' var NUMERICIDENTIFIERLOOSE = R++ src[NUMERICIDENTIFIERLOOSE] = '[0-9]+' // ## Non-numeric Identifier // Zero or more digits, followed by a letter or hyphen, and then zero or // more letters, digits, or hyphens. var NONNUMERICIDENTIFIER = R++ src[NONNUMERICIDENTIFIER] = '\\d[a-zA-Z-][a-zA-Z0-9-]' // ## Main Version // Three dot-separated numeric identifiers. var MAINVERSION = R++ src[MAINVERSION] = '(' + src[NUMERICIDENTIFIER] + ')\\.' + '(' + src[NUMERICIDENTIFIER] + ')\\.' + '(' + src[NUMERICIDENTIFIER] + ')' var MAINVERSIONLOOSE = R++ src[MAINVERSIONLOOSE] = '(' + src[NUMERICIDENTIFIERLOOSE] + ')\\.' + '(' + src[NUMERICIDENTIFIERLOOSE] + ')\\.' + '(' + src[NUMERICIDENTIFIERLOOSE] + ')' // ## Pre-release Version Identifier // A numeric identifier, or a non-numeric identifier. var PRERELEASEIDENTIFIER = R++ src[PRERELEASEIDENTIFIER] = '(?:' + src[NUMERICIDENTIFIER] + '\|' + src[NONNUMERICIDENTIFIER] + ')' var PRERELEASEIDENTIFIERLOOSE = R++ src[PRERELEASEIDENTIFIERLOOSE] = '(?:' + src[NUMERICIDENTIFIERLOOSE] + '\|' + src[NONNUMERICIDENTIFIER] + ')' // ## Pre-release Version // Hyphen, followed by one or more dot-separated pre-release version // identifiers. var PRERELEASE = R++ src[PRERELEASE] = '(?:-(' + src[PRERELEASEIDENTIFIER] + '(?:\\.' + src[PRERELEASEIDENTIFIER] + ')))' var PRERELEASELOOSE = R++ src[PRERELEASELOOSE] = '(?:-?(' + src[PRERELEASEIDENTIFIERLOOSE] + '(?:\\.' + src[PRERELEASEIDENTIFIERLOOSE] + ')))' // ## Build Metadata Identifier // Any combination of digits, letters, or hyphens. var BUILDIDENTIFIER = R++ src[BUILDIDENTIFIER] = '[0-9A-Za-z-]+' // ## Build Metadata // Plus sign, followed by one or more period-separated build metadata // identifiers. var BUILD = R++ src[BUILD] = '(?:\\+(' + src[BUILDIDENTIFIER] + '(?:\\.' + src[BUILDIDENTIFIER] + ')))' // ## Full Version String // A main version, followed optionally by a pre-release version and // build metadata. // Note that the only major, minor, patch, and pre-release sections of // the version string are capturing groups. The build metadata is not a // capturing group, because it should not ever be used in version // comparison. var FULL = R++ var FULLPLAIN = 'v?' + src[MAINVERSION] + src[PRERELEASE] + '?' + src[BUILD] + '?' src[FULL] = '^' + FULLPLAIN + '$' // like full, but allows v1.2.3 and =1.2.3, which people do sometimes. // also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty // common in the npm registry. var LOOSEPLAIN = '[v=\\s]' + src[MAINVERSIONLOOSE] + src[PRERELEASELOOSE] + '?' + src[BUILD] + '?' var LOOSE = R++ src[LOOSE] = '^' + LOOSEPLAIN + '$' var GTLT = R++ src[GTLT] = '((?:<\|>)?=?)' // Something like "2." or "1.2.x". // Note that "x.x" is a valid xRange identifer, meaning "any version" // Only the first item is strictly required. var XRANGEIDENTIFIERLOOSE = R++ src[XRANGEIDENTIFIERLOOSE] = src[NUMERICIDENTIFIERLOOSE] + '\|x\|X\|\\' var XRANGEIDENTIFIER = R++ src[XRANGEIDENTIFIER] = src[NUMERICIDENTIFIER] + '\|x\|X\|\\' var XRANGEPLAIN = R++ src[XRANGEPLAIN] = '[v=\\s](' + src[XRANGEIDENTIFIER] + ')' + '(?:\\.(' + src[XRANGEIDENTIFIER] + ')' + '(?:\\.(' + src[XRANGEIDENTIFIER] + ')' + '(?:' + src[PRERELEASE] + ')?' + src[BUILD] + '?' + ')?)?' var XRANGEPLAINLOOSE = R++ src[XRANGEPLAINLOOSE] = '[v=\\s](' + src[XRANGEIDENTIFIERLOOSE] + ')' + '(?:\\.(' + src[XRANGEIDENTIFIERLOOSE] + ')' + '(?:\\.(' + src[XRANGEIDENTIFIERLOOSE] + ')' + '(?:' + src[PRERELEASELOOSE] + ')?' + src[BUILD] + '?' + ')?)?' var XRANGE = R++ src[XRANGE] = '^' + src[GTLT] + '\\s' + src[XRANGEPLAIN] + '$' var XRANGELOOSE = R++ src[XRANGELOOSE] = '^' + src[GTLT] + '\\s' + src[XRANGEPLAINLOOSE] + '$' // Coercion. // Extract anything that could conceivably be a part of a valid semver var COERCE = R++ src[COERCE] = '(?:^\|[^\\d])' + '(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '})' + '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' + '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' + '(?:$\|[^\\d])' // Tilde ranges. // Meaning is "reasonably at or greater than" var LONETILDE = R++ src[LONETILDE] = '(?:~>?)' var TILDETRIM = R++ src[TILDETRIM] = '(\\s)' + src[LONETILDE] + '\\s+' re[TILDETRIM] = new RegExp(src[TILDETRIM], 'g') var tildeTrimReplace = '$1~' var TILDE = R++ src[TILDE] = '^' + src[LONETILDE] + src[XRANGEPLAIN] + '$' var TILDELOOSE = R++ src[TILDELOOSE] = '^' + src[LONETILDE] + src[XRANGEPLAINLOOSE] + '$' // Caret ranges. // Meaning is "at least and backwards compatible with" var LONECARET = R++ src[LONECARET] = '(?:\\^)' var CARETTRIM = R++ src[CARETTRIM] = '(\\s)' + src[LONECARET] + '\\s+' re[CARETTRIM] = new RegExp(src[CARETTRIM], 'g') var caretTrimReplace = '$1^' var CARET = R++ src[CARET] = '^' + src[LONECARET] + src[XRANGEPLAIN] + '$' var CARETLOOSE = R++ src[CARETLOOSE] = '^' + src[LONECARET] + src[XRANGEPLAINLOOSE] + '$' // A simple gt/lt/eq thing, or just "" to indicate "any version" var COMPARATORLOOSE = R++ src[COMPARATORLOOSE] = '^' + src[GTLT] + '\\s(' + LOOSEPLAIN + ')$\|^$' var COMPARATOR = R++ src[COMPARATOR] = '^' + src[GTLT] + '\\s(' + FULLPLAIN + ')$\|^$' // An expression to strip any whitespace between the gtlt and the thing // it modifies, so that `> 1.2.3` ==> `>1.2.3` var COMPARATORTRIM = R++ src[COMPARATORTRIM] = '(\\s)' + src[GTLT] + '\\s(' + LOOSEPLAIN + '\|' + src[XRANGEPLAIN] + ')' // this one has to use the /g flag re[COMPARATORTRIM] = new RegExp(src[COMPARATORTRIM], 'g') var comparatorTrimReplace = '$1$2$3' // Something like `1.2.3 - 1.2.4` // Note that these all use the loose form, because they'll be // checked against either the strict or loose comparator form // later. var HYPHENRANGE = R++ src[HYPHENRANGE] = '^\\s(' + src[XRANGEPLAIN] + ')' + '\\s+-\\s+' + '(' + src[XRANGEPLAIN] + ')' + '\\s$' var HYPHENRANGELOOSE = R++ src[HYPHENRANGELOOSE] = '^\\s(' + src[XRANGEPLAINLOOSE] + ')' + '\\s+-\\s+' + '(' + src[XRANGEPLAINLOOSE] + ')' + '\\s$' // Star ranges basically just allow anything at all. var STAR = R++ src[STAR] = '(<\|>)?=?\\s\\' // Compile to actual regexp objects. // All are flag-free, unless they were created above with a flag. for (var i = 0; i < R; i++) { debug(i, src[i]) if (!re[i]) { re[i] = new RegExp(src[i]) } } exports.parse = parse function parse (version, options) { if (!options \|\| typeof options !== 'object') { options = { loose: !!options, includePrerelease: false } } if (version instanceof SemVer) { return version } if (typeof version !== 'string') { return null } if (version.length > MAX_LENGTH) { return null } var r = options.loose ? re[LOOSE] : re[FULL] if (!r.test(version)) { return null } try { return new SemVer(version, options) } catch (er) { return null } } exports.valid = valid function valid (version, options) { var v = parse(version, options) return v ? v.version : null } exports.clean = clean function clean (version, options) { var s = parse(version.trim().replace(/^[=v]+/, ''), options) return s ? s.version : null } exports.SemVer = SemVer function SemVer (version, options) { if (!options \|\| typeof options !== 'object') { options = { loose: !!options, includePrerelease: false } } if (version instanceof SemVer) { if (version.loose === options.loose) { return version } else { version = version.version } } else if (typeof version !== 'string') { throw new TypeError('Invalid Version: ' + version) } if (version.length > MAX_LENGTH) { throw new TypeError('version is longer than ' + MAX_LENGTH + ' characters') } if (!(this instanceof SemVer)) { return new SemVer(version, options) } debug('SemVer', version, options) this.options = options this.loose = !!options.loose var m = version.trim().match(options.loose ? re[LOOSE] : re[FULL]) if (!m) { throw new TypeError('Invalid Version: ' + version) } this.raw = version // these are actually numbers this.major = +m[1] this.minor = +m[2] this.patch = +m[3] if (this.major > MAX_SAFE_INTEGER \|\| this.major < 0) { throw new TypeError('Invalid major version') } if (this.minor > MAX_SAFE_INTEGER \|\| this.minor < 0) { throw new TypeError('Invalid minor version') } if (this.patch > MAX_SAFE_INTEGER \|\| this.patch < 0) { throw new TypeError('Invalid patch version') } // numberify any prerelease numeric ids if (!m[4]) { this.prerelease = [] } else { this.prerelease = m[4].split('.').map(function (id) { if (/^[0-9]+$/.test(id)) { var num = +id if (num >= 0 && num < MAX_SAFE_INTEGER) { return num } } return id }) } this.build = m[5] ? m[5].split('.') : [] this.format() } SemVer.prototype.format = function () { this.version = this.major + '.' + this.minor + '.' + this.patch if (this.prerelease.length) { this.version += '-' + this.prerelease.join('.') } return this.version } SemVer.prototype.toString = function () { return this.version } SemVer.prototype.compare = function (other) { debug('SemVer.compare', this.version, this.options, other) if (!(other instanceof SemVer)) { other = new SemVer(other, this.options) } return this.compareMain(other) \|\| this.comparePre(other) } SemVer.prototype.compareMain = function (other) { if (!(other instanceof SemVer)) { other = new SemVer(other, this.options) } return compareIdentifiers(this.major, other.major) \|\| compareIdentifiers(this.minor, other.minor) \|\| compareIdentifiers(this.patch, other.patch) } SemVer.prototype.comparePre = function (other) { if (!(other instanceof SemVer)) { other = new SemVer(other, this.options) } // NOT having a prerelease is > having one if (this.prerelease.length && !other.prerelease.length) { return -1 } else if (!this.prerelease.length && other.prerelease.length) { return 1 } else if (!this.prerelease.length && !other.prerelease.length) { return 0 } var i = 0 do { var a = this.prerelease[i] var b = other.prerelease[i] debug('prerelease compare', i, a, b) if (a === undefined && b === undefined) { return 0 } else if (b === undefined) { return 1 } else if (a === undefined) { return -1 } else if (a === b) { continue } else { return compareIdentifiers(a, b) } } while (++i) } // preminor will bump the version up to the next minor release, and immediately // down to pre-release. premajor and prepatch work the same way. SemVer.prototype.inc = function (release, identifier) { switch (release) { case 'premajor': this.prerelease.length = 0 this.patch = 0 this.minor = 0 this.major++ this.inc('pre', identifier) break case 'preminor': this.prerelease.length = 0 this.patch = 0 this.minor++ this.inc('pre', identifier) break case 'prepatch': // If this is already a prerelease, it will bump to the next version // drop any prereleases that might already exist, since they are not // relevant at this point. this.prerelease.length = 0 this.inc('patch', identifier) this.inc('pre', identifier) break // If the input is a non-prerelease version, this acts the same as // prepatch. case 'prerelease': if (this.prerelease.length === 0) { this.inc('patch', identifier) } this.inc('pre', identifier) break case 'major': // If this is a pre-major version, bump up to the same major version. // Otherwise increment major. // 1.0.0-5 bumps to 1.0.0 // 1.1.0 bumps to 2.0.0 if (this.minor !== 0 \|\| this.patch !== 0 \|\| this.prerelease.length === 0) { this.major++ } this.minor = 0 this.patch = 0 this.prerelease = [] break case 'minor': // If this is a pre-minor version, bump up to the same minor version. // Otherwise increment minor. // 1.2.0-5 bumps to 1.2.0 // 1.2.1 bumps to 1.3.0 if (this.patch !== 0 \|\| this.prerelease.length === 0) { this.minor++ } this.patch = 0 this.prerelease = [] break case 'patch': // If this is not a pre-release version, it will increment the patch. // If it is a pre-release it will bump up to the same patch version. // 1.2.0-5 patches to 1.2.0 // 1.2.0 patches to 1.2.1 if (this.prerelease.length === 0) { this.patch++ } this.prerelease = [] break // This probably shouldn't be used publicly. // 1.0.0 "pre" would become 1.0.0-0 which is the wrong direction. case 'pre': if (this.prerelease.length === 0) { this.prerelease = [0] } else { var i = this.prerelease.length while (--i >= 0) { if (typeof this.prerelease[i] === 'number') { this.prerelease[i]++ i = -2 } } if (i === -1) { // didn't increment anything this.prerelease.push(0) } } if (identifier) { // 1.2.0-beta.1 bumps to 1.2.0-beta.2, // 1.2.0-beta.fooblz or 1.2.0-beta bumps to 1.2.0-beta.0 if (this.prerelease[0] === identifier) { if (isNaN(this.prerelease[1])) { this.prerelease = [identifier, 0] } } else { this.prerelease = [identifier, 0] } } break default: throw new Error('invalid increment argument: ' + release) } this.format() this.raw = this.version return this } exports.inc = inc function inc (version, release, loose, identifier) { if (typeof (loose) === 'string') { identifier = loose loose = undefined } try { return new SemVer(version, loose).inc(release, identifier).version } catch (er) { return null } } exports.diff = diff function diff (version1, version2) { if (eq(version1, version2)) { return null } else { var v1 = parse(version1) var v2 = parse(version2) var prefix = '' if (v1.prerelease.length \|\| v2.prerelease.length) { prefix = 'pre' var defaultResult = 'prerelease' } for (var key in v1) { if (key === 'major' \|\| key === 'minor' \|\| key === 'patch') { if (v1[key] !== v2[key]) { return prefix + key } } } return defaultResult // may be undefined } } exports.compareIdentifiers = compareIdentifiers var numeric = /^[0-9]+$/ function compareIdentifiers (a, b) { var anum = numeric.test(a) var bnum = numeric.test(b) if (anum && bnum) { a = +a b = +b } return a === b ? 0 : (anum && !bnum) ? -1 : (bnum && !anum) ? 1 : a < b ? -1 : 1 } exports.rcompareIdentifiers = rcompareIdentifiers function rcompareIdentifiers (a, b) { return compareIdentifiers(b, a) } exports.major = major function major (a, loose) { return new SemVer(a, loose).major } exports.minor = minor function minor (a, loose) { return new SemVer(a, loose).minor } exports.patch = patch function patch (a, loose) { return new SemVer(a, loose).patch } exports.compare = compare function compare (a, b, loose) { return new SemVer(a, loose).compare(new SemVer(b, loose)) } exports.compareLoose = compareLoose function compareLoose (a, b) { return compare(a, b, true) } exports.rcompare = rcompare function rcompare (a, b, loose) { return compare(b, a, loose) } exports.sort = sort function sort (list, loose) { return list.sort(function (a, b) { return exports.compare(a, b, loose) }) } exports.rsort = rsort function rsort (list, loose) { return list.sort(function (a, b) { return exports.rcompare(a, b, loose) }) } exports.gt = gt function gt (a, b, loose) { return compare(a, b, loose) > 0 } exports.lt = lt function lt (a, b, loose) { return compare(a, b, loose) < 0 } exports.eq = eq function eq (a, b, loose) { return compare(a, b, loose) === 0 } exports.neq = neq function neq (a, b, loose) { return compare(a, b, loose) !== 0 } exports.gte = gte function gte (a, b, loose) { return compare(a, b, loose) >= 0 } exports.lte = lte function lte (a, b, loose) { return compare(a, b, loose) <= 0 } exports.cmp = cmp function cmp (a, op, b, loose) { switch (op) { case '===': if (typeof a === 'object') a = a.version if (typeof b === 'object') b = b.version return a === b case '!==': if (typeof a === 'object') a = a.version if (typeof b === 'object') b = b.version return a !== b case '': case '=': case '==': return eq(a, b, loose) case '!=': return neq(a, b, loose) case '>': return gt(a, b, loose) case '>=': return gte(a, b, loose) case '<': return lt(a, b, loose) case '<=': return lte(a, b, loose) default: throw new TypeError('Invalid operator: ' + op) } } exports.Comparator = Comparator function Comparator (comp, options) { if (!options \|\| typeof options !== 'object') { options = { loose: !!options, includePrerelease: false } } if (comp instanceof Comparator) { if (comp.loose === !!options.loose) { return comp } else { comp = comp.value } } if (!(this instanceof Comparator)) { return new Comparator(comp, options) } debug('comparator', comp, options) this.options = options this.loose = !!options.loose this.parse(comp) if (this.semver === ANY) { this.value = '' } else { this.value = this.operator + this.semver.version } debug('comp', this) } var ANY = {} Comparator.prototype.parse = function (comp) { var r = this.options.loose ? re[COMPARATORLOOSE] : re[COMPARATOR] var m = comp.match(r) if (!m) { throw new TypeError('Invalid comparator: ' + comp) } this.operator = m[1] if (this.operator === '=') { this.operator = '' } // if it literally is just '>' or '' then allow anything. if (!m[2]) { this.semver = ANY } else { this.semver = new SemVer(m[2], this.options.loose) } } Comparator.prototype.toString = function () { return this.value } Comparator.prototype.test = function (version) { debug('Comparator.test', version, this.options.loose) if (this.semver === ANY) { return true } if (typeof version === 'string') { version = new SemVer(version, this.options) } return cmp(version, this.operator, this.semver, this.options) } Comparator.prototype.intersects = function (comp, options) { if (!(comp instanceof Comparator)) { throw new TypeError('a Comparator is required') } if (!options \|\| typeof options !== 'object') { options = { loose: !!options, includePrerelease: false } } var rangeTmp if (this.operator === '') { rangeTmp = new Range(comp.value, options) return satisfies(this.value, rangeTmp, options) } else if (comp.operator === '') { rangeTmp = new Range(this.value, options) return satisfies(comp.semver, rangeTmp, options) } var sameDirectionIncreasing = (this.operator === '>=' \|\| this.operator === '>') && (comp.operator === '>=' \|\| comp.operator === '>') var sameDirectionDecreasing = (this.operator === '<=' \|\| this.operator === '<') && (comp.operator === '<=' \|\| comp.operator === '<') var sameSemVer = this.semver.version === comp.semver.version var differentDirectionsInclusive = (this.operator === '>=' \|\| this.operator === '<=') && (comp.operator === '>=' \|\| comp.operator === '<=') var oppositeDirectionsLessThan = cmp(this.semver, '<', comp.semver, options) && ((this.operator === '>=' \|\| this.operator === '>') && (comp.operator === '<=' \|\| comp.operator === '<')) var oppositeDirectionsGreaterThan = cmp(this.semver, '>', comp.semver, options) && ((this.operator === '<=' \|\| this.operator === '<') && (comp.operator === '>=' \|\| comp.operator === '>')) return sameDirectionIncreasing \|\| sameDirectionDecreasing \|\| (sameSemVer && differentDirectionsInclusive) \|\| oppositeDirectionsLessThan \|\| oppositeDirectionsGreaterThan } exports.Range = Range function Range (range, options) { if (!options \|\| typeof options !== 'object') { options = { loose: !!options, includePrerelease: false } } if (range instanceof Range) { if (range.loose === !!options.loose && range.includePrerelease === !!options.includePrerelease) { return range } else { return new Range(range.raw, options) } } if (range instanceof Comparator) { return new Range(range.value, options) } if (!(this instanceof Range)) { return new Range(range, options) } this.options = options this.loose = !!options.loose this.includePrerelease = !!options.includePrerelease // First, split based on boolean or \|\| this.raw = range this.set = range.split(/\s\\|\\|\s/).map(function (range) { return this.parseRange(range.trim()) }, this).filter(function (c) { // throw out any that are not relevant for whatever reason return c.length }) if (!this.set.length) { throw new TypeError('Invalid SemVer Range: ' + range) } this.format() } Range.prototype.format = function () { this.range = this.set.map(function (comps) { return comps.join(' ').trim() }).join('\|\|').trim() return this.range } Range.prototype.toString = function () { return this.range } Range.prototype.parseRange = function (range) { var loose = this.options.loose range = range.trim() // `1.2.3 - 1.2.4` => `>=1.2.3 <=1.2.4` var hr = loose ? re[HYPHENRANGELOOSE] : re[HYPHENRANGE] range = range.replace(hr, hyphenReplace) debug('hyphen replace', range) // `> 1.2.3 < 1.2.5` => `>1.2.3 <1.2.5` range = range.replace(re[COMPARATORTRIM], comparatorTrimReplace) debug('comparator trim', range, re[COMPARATORTRIM]) // `~ 1.2.3` => `~1.2.3` range = range.replace(re[TILDETRIM], tildeTrimReplace) // `^ 1.2.3` => `^1.2.3` range = range.replace(re[CARETTRIM], caretTrimReplace) // normalize spaces range = range.split(/\s+/).join(' ') // At this point, the range is completely trimmed and // ready to be split into comparators. var compRe = loose ? re[COMPARATORLOOSE] : re[COMPARATOR] var set = range.split(' ').map(function (comp) { return parseComparator(comp, this.options) }, this).join(' ').split(/\s+/) if (this.options.loose) { // in loose mode, throw out any that are not valid comparators set = set.filter(function (comp) { return !!comp.match(compRe) }) } set = set.map(function (comp) { return new Comparator(comp, this.options) }, this) return set } Range.prototype.intersects = function (range, options) { if (!(range instanceof Range)) { throw new TypeError('a Range is required') } return this.set.some(function (thisComparators) { return thisComparators.every(function (thisComparator) { return range.set.some(function (rangeComparators) { return rangeComparators.every(function (rangeComparator) { return thisComparator.intersects(rangeComparator, options) }) }) }) }) } // Mostly just for testing and legacy API reasons exports.toComparators = toComparators function toComparators (range, options) { return new Range(range, options).set.map(function (comp) { return comp.map(function (c) { return c.value }).join(' ').trim().split(' ') }) } // comprised of xranges, tildes, stars, and gtlt's at this point. // already replaced the hyphen ranges // turn into a set of JUST comparators. function parseComparator (comp, options) { debug('comp', comp, options) comp = replaceCarets(comp, options) debug('caret', comp) comp = replaceTildes(comp, options) debug('tildes', comp) comp = replaceXRanges(comp, options) debug('xrange', comp) comp = replaceStars(comp, options) debug('stars', comp) return comp } function isX (id) { return !id \|\| id.toLowerCase() === 'x' \|\| id === '' } // ~, ~> --> * (any, kinda silly) // ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0 // ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0 // ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0 // ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0 // ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0 function replaceTildes (comp, options) { return comp.trim().split(/\s+/).map(function (comp) { return replaceTilde(comp, options) }).join(' ') } function replaceTilde (comp, options) { var r = options.loose ? re[TILDELOOSE] : re[TILDE] return comp.replace(r, function (_, M, m, p, pr) { debug('tilde', comp, _, M, m, p, pr) var ret if (isX(M)) { ret = '' } else if (isX(m)) { ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0' } else if (isX(p)) { // ~1.2 == >=1.2.0 <1.3.0 ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0' } else if (pr) { debug('replaceTilde pr', pr) ret = '>=' + M + '.' + m + '.' + p + '-' + pr + ' <' + M + '.' + (+m + 1) + '.0' } else { // ~1.2.3 == >=1.2.3 <1.3.0 ret = '>=' + M + '.' + m + '.' + p + ' <' + M + '.' + (+m + 1) + '.0' } debug('tilde return', ret) return ret }) } // ^ --> * (any, kinda silly) // ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0 // ^2.0, ^2.0.x --> >=2.0.0 <3.0.0 // ^1.2, ^1.2.x --> >=1.2.0 <2.0.0 // ^1.2.3 --> >=1.2.3 <2.0.0 // ^1.2.0 --> >=1.2.0 <2.0.0 function replaceCarets (comp, options) { return comp.trim().split(/\s+/).map(function (comp) { return replaceCaret(comp, options) }).join(' ') } function replaceCaret (comp, options) { debug('caret', comp, options) var r = options.loose ? re[CARETLOOSE] : re[CARET] return comp.replace(r, function (_, M, m, p, pr) { debug('caret', comp, _, M, m, p, pr) var ret if (isX(M)) { ret = '' } else if (isX(m)) { ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0' } else if (isX(p)) { if (M === '0') { ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0' } else { ret = '>=' + M + '.' + m + '.0 <' + (+M + 1) + '.0.0' } } else if (pr) { debug('replaceCaret pr', pr) if (M === '0') { if (m === '0') { ret = '>=' + M + '.' + m + '.' + p + '-' + pr + ' <' + M + '.' + m + '.' + (+p + 1) } else { ret = '>=' + M + '.' + m + '.' + p + '-' + pr + ' <' + M + '.' + (+m + 1) + '.0' } } else { ret = '>=' + M + '.' + m + '.' + p + '-' + pr + ' <' + (+M + 1) + '.0.0' } } else { debug('no pr') if (M === '0') { if (m === '0') { ret = '>=' + M + '.' + m + '.' + p + ' <' + M + '.' + m + '.' + (+p + 1) } else { ret = '>=' + M + '.' + m + '.' + p + ' <' + M + '.' + (+m + 1) + '.0' } } else { ret = '>=' + M + '.' + m + '.' + p + ' <' + (+M + 1) + '.0.0' } } debug('caret return', ret) return ret }) } function replaceXRanges (comp, options) { debug('replaceXRanges', comp, options) return comp.split(/\s+/).map(function (comp) { return replaceXRange(comp, options) }).join(' ') } function replaceXRange (comp, options) { comp = comp.trim() var r = options.loose ? re[XRANGELOOSE] : re[XRANGE] return comp.replace(r, function (ret, gtlt, M, m, p, pr) { debug('xRange', comp, ret, gtlt, M, m, p, pr) var xM = isX(M) var xm = xM \|\| isX(m) var xp = xm \|\| isX(p) var anyX = xp if (gtlt === '=' && anyX) { gtlt = '' } if (xM) { if (gtlt === '>' \|\| gtlt === '<') { // nothing is allowed ret = '<0.0.0' } else { // nothing is forbidden ret = '' } } else if (gtlt && anyX) { // we know patch is an x, because we have any x at all. // replace X with 0 if (xm) { m = 0 } p = 0 if (gtlt === '>') { // >1 => >=2.0.0 // >1.2 => >=1.3.0 // >1.2.3 => >= 1.2.4 gtlt = '>=' if (xm) { M = +M + 1 m = 0 p = 0 } else { m = +m + 1 p = 0 } } else if (gtlt === '<=') { // <=0.7.x is actually <0.8.0, since any 0.7.x should // pass. Similarly, <=7.x is actually <8.0.0, etc. gtlt = '<' if (xm) { M = +M + 1 } else { m = +m + 1 } } ret = gtlt + M + '.' + m + '.' + p } else if (xm) { ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0' } else if (xp) { ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0' } debug('xRange return', ret) return ret }) } // Because is AND-ed with everything else in the comparator, // and '' means "any version", just remove the s entirely. function replaceStars (comp, options) { debug('replaceStars', comp, options) // Looseness is ignored here. star is always as loose as it gets! return comp.trim().replace(re[STAR], '') } // This function is passed to string.replace(re[HYPHENRANGE]) // M, m, patch, prerelease, build // 1.2 - 3.4.5 => >=1.2.0 <=3.4.5 // 1.2.3 - 3.4 => >=1.2.0 <3.5.0 Any 3.4.x will do // 1.2 - 3.4 => >=1.2.0 <3.5.0 function hyphenReplace ($0, from, fM, fm, fp, fpr, fb, to, tM, tm, tp, tpr, tb) { if (isX(fM)) { from = '' } else if (isX(fm)) { from = '>=' + fM + '.0.0' } else if (isX(fp)) { from = '>=' + fM + '.' + fm + '.0' } else { from = '>=' + from } if (isX(tM)) { to = '' } else if (isX(tm)) { to = '<' + (+tM + 1) + '.0.0' } else if (isX(tp)) { to = '<' + tM + '.' + (+tm + 1) + '.0' } else if (tpr) { to = '<=' + tM + '.' + tm + '.' + tp + '-' + tpr } else { to = '<=' + to } return (from + ' ' + to).trim() } // if ANY of the sets match ALL of its comparators, then pass Range.prototype.test = function (version) { if (!version) { return false } if (typeof version === 'string') { version = new SemVer(version, this.options) } for (var i = 0; i < this.set.length; i++) { if (testSet(this.set[i], version, this.options)) { return true } } return false } function testSet (set, version, options) { for (var i = 0; i < set.length; i++) { if (!set[i].test(version)) { return false } } if (version.prerelease.length && !options.includePrerelease) { // Find the set of versions that are allowed to have prereleases // For example, ^1.2.3-pr.1 desugars to >=1.2.3-pr.1 <2.0.0 // That should allow `1.2.3-pr.2` to pass. // However, `1.2.4-alpha.notready` should NOT be allowed, // even though it's within the range set by the comparators. for (i = 0; i < set.length; i++) { debug(set[i].semver) if (set[i].semver === ANY) { continue } if (set[i].semver.prerelease.length > 0) { var allowed = set[i].semver if (allowed.major === version.major && allowed.minor === version.minor && allowed.patch === version.patch) { return true } } } // Version has a -pre, but it's not one of the ones we like. return false } return true } exports.satisfies = satisfies function satisfies (version, range, options) { try { range = new Range(range, options) } catch (er) { return false } return range.test(version) } exports.maxSatisfying = maxSatisfying function maxSatisfying (versions, range, options) { var max = null var maxSV = null try { var rangeObj = new Range(range, options) } catch (er) { return null } versions.forEach(function (v) { if (rangeObj.test(v)) { // satisfies(v, range, options) if (!max \|\| maxSV.compare(v) === -1) { // compare(max, v, true) max = v maxSV = new SemVer(max, options) } } }) return max } exports.minSatisfying = minSatisfying function minSatisfying (versions, range, options) { var min = null var minSV = null try { var rangeObj = new Range(range, options) } catch (er) { return null } versions.forEach(function (v) { if (rangeObj.test(v)) { // satisfies(v, range, options) if (!min \|\| minSV.compare(v) === 1) { // compare(min, v, true) min = v minSV = new SemVer(min, options) } } }) return min } exports.minVersion = minVersion function minVersion (range, loose) { range = new Range(range, loose) var minver = new SemVer('0.0.0') if (range.test(minver)) { return minver } minver = new SemVer('0.0.0-0') if (range.test(minver)) { return minver } minver = null for (var i = 0; i < range.set.length; ++i) { var comparators = range.set[i] comparators.forEach(function (comparator) { // Clone to avoid manipulating the comparator's semver object. var compver = new SemVer(comparator.semver.version) switch (comparator.operator) { case '>': if (compver.prerelease.length === 0) { compver.patch++ } else { compver.prerelease.push(0) } compver.raw = compver.format() / fallthrough / case '': case '>=': if (!minver \|\| gt(minver, compver)) { minver = compver } break case '<': case '<=': / Ignore maximum versions / break / istanbul ignore next / default: throw new Error('Unexpected operation: ' + comparator.operator) } }) } if (minver && range.test(minver)) { return minver } return null } exports.validRange = validRange function validRange (range, options) { try { // Return '' instead of '' so that truthiness works. // This will throw if it's invalid anyway return new Range(range, options).range \|\| '*' } catch (er) { return null } } // Determine if version is less than all the versions possible in the range exports.ltr = ltr function ltr (version, range, options) { return outside(version, range, '<', options) } // Determine if version is greater than all the versions possible in the range. exports.gtr = gtr function gtr (version, range, options) { return outside(version, range, '>', options) } exports.outside = outside function outside (version, range, hilo, options) { version = new SemVer(version, options) range = new Range(range, options) var gtfn, ltefn, ltfn, comp, ecomp switch (hilo) { case '>': gtfn = gt ltefn = lte ltfn = lt comp = '>' ecomp = '>=' break case '<': gtfn = lt ltefn = gte ltfn = gt comp = '<' ecomp = '<=' break default: throw new TypeError('Must provide a hilo val of "<" or ">"') } // If it satisifes the range it is not outside if (satisfies(version, range, options)) { return false } // From now on, variable terms are as if we're in "gtr" mode. // but note that everything is flipped for the "ltr" function. for (var i = 0; i < range.set.length; ++i) { var comparators = range.set[i] var high = null var low = null comparators.forEach(function (comparator) { if (comparator.semver === ANY) { comparator = new Comparator('>=0.0.0') } high = high \|\| comparator low = low \|\| comparator if (gtfn(comparator.semver, high.semver, options)) { high = comparator } else if (ltfn(comparator.semver, low.semver, options)) { low = comparator } }) // If the edge version comparator has a operator then our version // isn't outside it if (high.operator === comp \|\| high.operator === ecomp) { return false } // If the lowest version comparator has an operator and our version // is less than it then it isn't higher than the range if ((!low.operator \|\| low.operator === comp) && ltefn(version, low.semver)) { return false } else if (low.operator === ecomp && ltfn(version, low.semver)) { return false } } return true } exports.prerelease = prerelease function prerelease (version, options) { var parsed = parse(version, options) return (parsed && parsed.prerelease.length) ? parsed.prerelease : null } exports.intersects = intersects function intersects (r1, r2, options) { r1 = new Range(r1, options) r2 = new Range(r2, options) return r1.intersects(r2) } exports.coerce = coerce function coerce (version) { if (version instanceof SemVer) { return version } if (typeof version !== 'string') { return null } var match = version.match(re[COERCE]) if (match == null) { return null } return parse(match[1] + '.' + (match[2] \|\| '0') + '.' + (match[3] \|\| '0')) } Back

Edit File : semver.js | Size : 37.89 KB

exports = module.exports = SemVer

var debug
/* istanbul ignore next */
if (typeof process === 'object' &&
    process.env &&
    process.env.NODE_DEBUG &&
    /\bsemver\b/i.test(process.env.NODE_DEBUG)) {
  debug = function () {
    var args = Array.prototype.slice.call(arguments, 0)
    args.unshift('SEMVER')
    console.log.apply(console, args)
  }
} else {
  debug = function () {}
}

// Note: this is the semver.org version of the spec that it implements
// Not necessarily the package version of this code.
exports.SEMVER_SPEC_VERSION = '2.0.0'

var MAX_LENGTH = 256
var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER ||
  /* istanbul ignore next */ 9007199254740991

// Max safe segment length for coercion.
var MAX_SAFE_COMPONENT_LENGTH = 16

// The actual regexps go on exports.re
var re = exports.re = []
var src = exports.src = []
var R = 0

// The following Regular Expressions can be used for tokenizing,
// validating, and parsing SemVer version strings.

// ## Numeric Identifier
// A single `0`, or a non-zero digit followed by zero or more digits.

var NUMERICIDENTIFIER = R++
src[NUMERICIDENTIFIER] = '0|[1-9]\\d*'
var NUMERICIDENTIFIERLOOSE = R++
src[NUMERICIDENTIFIERLOOSE] = '[0-9]+'

// ## Non-numeric Identifier
// Zero or more digits, followed by a letter or hyphen, and then zero or
// more letters, digits, or hyphens.

var NONNUMERICIDENTIFIER = R++
src[NONNUMERICIDENTIFIER] = '\\d*[a-zA-Z-][a-zA-Z0-9-]*'

// ## Main Version
// Three dot-separated numeric identifiers.

var MAINVERSION = R++
src[MAINVERSION] = '(' + src[NUMERICIDENTIFIER] + ')\\.' +
                   '(' + src[NUMERICIDENTIFIER] + ')\\.' +
                   '(' + src[NUMERICIDENTIFIER] + ')'

var MAINVERSIONLOOSE = R++
src[MAINVERSIONLOOSE] = '(' + src[NUMERICIDENTIFIERLOOSE] + ')\\.' +
                        '(' + src[NUMERICIDENTIFIERLOOSE] + ')\\.' +
                        '(' + src[NUMERICIDENTIFIERLOOSE] + ')'

// ## Pre-release Version Identifier
// A numeric identifier, or a non-numeric identifier.

var PRERELEASEIDENTIFIER = R++
src[PRERELEASEIDENTIFIER] = '(?:' + src[NUMERICIDENTIFIER] +
                            '|' + src[NONNUMERICIDENTIFIER] + ')'

var PRERELEASEIDENTIFIERLOOSE = R++
src[PRERELEASEIDENTIFIERLOOSE] = '(?:' + src[NUMERICIDENTIFIERLOOSE] +
                                 '|' + src[NONNUMERICIDENTIFIER] + ')'

// ## Pre-release Version
// Hyphen, followed by one or more dot-separated pre-release version
// identifiers.

var PRERELEASE = R++
src[PRERELEASE] = '(?:-(' + src[PRERELEASEIDENTIFIER] +
                  '(?:\\.' + src[PRERELEASEIDENTIFIER] + ')*))'

var PRERELEASELOOSE = R++
src[PRERELEASELOOSE] = '(?:-?(' + src[PRERELEASEIDENTIFIERLOOSE] +
                       '(?:\\.' + src[PRERELEASEIDENTIFIERLOOSE] + ')*))'

// ## Build Metadata Identifier
// Any combination of digits, letters, or hyphens.

var BUILDIDENTIFIER = R++
src[BUILDIDENTIFIER] = '[0-9A-Za-z-]+'

// ## Build Metadata
// Plus sign, followed by one or more period-separated build metadata
// identifiers.

var BUILD = R++
src[BUILD] = '(?:\\+(' + src[BUILDIDENTIFIER] +
             '(?:\\.' + src[BUILDIDENTIFIER] + ')*))'

// ## Full Version String
// A main version, followed optionally by a pre-release version and
// build metadata.

// Note that the only major, minor, patch, and pre-release sections of
// the version string are capturing groups.  The build metadata is not a
// capturing group, because it should not ever be used in version
// comparison.

var FULL = R++
var FULLPLAIN = 'v?' + src[MAINVERSION] +
                src[PRERELEASE] + '?' +
                src[BUILD] + '?'

src[FULL] = '^' + FULLPLAIN + '$'

// like full, but allows v1.2.3 and =1.2.3, which people do sometimes.
// also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty
// common in the npm registry.
var LOOSEPLAIN = '[v=\\s]*' + src[MAINVERSIONLOOSE] +
                 src[PRERELEASELOOSE] + '?' +
                 src[BUILD] + '?'

var LOOSE = R++
src[LOOSE] = '^' + LOOSEPLAIN + '$'

var GTLT = R++
src[GTLT] = '((?:<|>)?=?)'

// Something like "2.*" or "1.2.x".
// Note that "x.x" is a valid xRange identifer, meaning "any version"
// Only the first item is strictly required.
var XRANGEIDENTIFIERLOOSE = R++
src[XRANGEIDENTIFIERLOOSE] = src[NUMERICIDENTIFIERLOOSE] + '|x|X|\\*'
var XRANGEIDENTIFIER = R++
src[XRANGEIDENTIFIER] = src[NUMERICIDENTIFIER] + '|x|X|\\*'

var XRANGEPLAIN = R++
src[XRANGEPLAIN] = '[v=\\s]*(' + src[XRANGEIDENTIFIER] + ')' +
                   '(?:\\.(' + src[XRANGEIDENTIFIER] + ')' +
                   '(?:\\.(' + src[XRANGEIDENTIFIER] + ')' +
                   '(?:' + src[PRERELEASE] + ')?' +
                   src[BUILD] + '?' +
                   ')?)?'

var XRANGEPLAINLOOSE = R++
src[XRANGEPLAINLOOSE] = '[v=\\s]*(' + src[XRANGEIDENTIFIERLOOSE] + ')' +
                        '(?:\\.(' + src[XRANGEIDENTIFIERLOOSE] + ')' +
                        '(?:\\.(' + src[XRANGEIDENTIFIERLOOSE] + ')' +
                        '(?:' + src[PRERELEASELOOSE] + ')?' +
                        src[BUILD] + '?' +
                        ')?)?'

var XRANGE = R++
src[XRANGE] = '^' + src[GTLT] + '\\s*' + src[XRANGEPLAIN] + '$'
var XRANGELOOSE = R++
src[XRANGELOOSE] = '^' + src[GTLT] + '\\s*' + src[XRANGEPLAINLOOSE] + '$'

// Coercion.
// Extract anything that could conceivably be a part of a valid semver
var COERCE = R++
src[COERCE] = '(?:^|[^\\d])' +
              '(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '})' +
              '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' +
              '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' +
              '(?:$|[^\\d])'

// Tilde ranges.
// Meaning is "reasonably at or greater than"
var LONETILDE = R++
src[LONETILDE] = '(?:~>?)'

var TILDETRIM = R++
src[TILDETRIM] = '(\\s*)' + src[LONETILDE] + '\\s+'
re[TILDETRIM] = new RegExp(src[TILDETRIM], 'g')
var tildeTrimReplace = '$1~'

var TILDE = R++
src[TILDE] = '^' + src[LONETILDE] + src[XRANGEPLAIN] + '$'
var TILDELOOSE = R++
src[TILDELOOSE] = '^' + src[LONETILDE] + src[XRANGEPLAINLOOSE] + '$'

// Caret ranges.
// Meaning is "at least and backwards compatible with"
var LONECARET = R++
src[LONECARET] = '(?:\\^)'

var CARETTRIM = R++
src[CARETTRIM] = '(\\s*)' + src[LONECARET] + '\\s+'
re[CARETTRIM] = new RegExp(src[CARETTRIM], 'g')
var caretTrimReplace = '$1^'

var CARET = R++
src[CARET] = '^' + src[LONECARET] + src[XRANGEPLAIN] + '$'
var CARETLOOSE = R++
src[CARETLOOSE] = '^' + src[LONECARET] + src[XRANGEPLAINLOOSE] + '$'

// A simple gt/lt/eq thing, or just "" to indicate "any version"
var COMPARATORLOOSE = R++
src[COMPARATORLOOSE] = '^' + src[GTLT] + '\\s*(' + LOOSEPLAIN + ')$|^$'
var COMPARATOR = R++
src[COMPARATOR] = '^' + src[GTLT] + '\\s*(' + FULLPLAIN + ')$|^$'

// An expression to strip any whitespace between the gtlt and the thing
// it modifies, so that `> 1.2.3` ==> `>1.2.3`
var COMPARATORTRIM = R++
src[COMPARATORTRIM] = '(\\s*)' + src[GTLT] +
                      '\\s*(' + LOOSEPLAIN + '|' + src[XRANGEPLAIN] + ')'

// this one has to use the /g flag
re[COMPARATORTRIM] = new RegExp(src[COMPARATORTRIM], 'g')
var comparatorTrimReplace = '$1$2$3'

// Something like `1.2.3 - 1.2.4`
// Note that these all use the loose form, because they'll be
// checked against either the strict or loose comparator form
// later.
var HYPHENRANGE = R++
src[HYPHENRANGE] = '^\\s*(' + src[XRANGEPLAIN] + ')' +
                   '\\s+-\\s+' +
                   '(' + src[XRANGEPLAIN] + ')' +
                   '\\s*$'

var HYPHENRANGELOOSE = R++
src[HYPHENRANGELOOSE] = '^\\s*(' + src[XRANGEPLAINLOOSE] + ')' +
                        '\\s+-\\s+' +
                        '(' + src[XRANGEPLAINLOOSE] + ')' +
                        '\\s*$'

// Star ranges basically just allow anything at all.
var STAR = R++
src[STAR] = '(<|>)?=?\\s*\\*'

// Compile to actual regexp objects.
// All are flag-free, unless they were created above with a flag.
for (var i = 0; i < R; i++) {
  debug(i, src[i])
  if (!re[i]) {
    re[i] = new RegExp(src[i])
  }
}

exports.parse = parse
function parse (version, options) {
  if (!options || typeof options !== 'object') {
    options = {
      loose: !!options,
      includePrerelease: false
    }
  }

if (version instanceof SemVer) {
    return version
  }

if (typeof version !== 'string') {
    return null
  }

if (version.length > MAX_LENGTH) {
    return null
  }

var r = options.loose ? re[LOOSE] : re[FULL]
  if (!r.test(version)) {
    return null
  }

try {
    return new SemVer(version, options)
  } catch (er) {
    return null
  }
}

exports.valid = valid
function valid (version, options) {
  var v = parse(version, options)
  return v ? v.version : null
}

exports.clean = clean
function clean (version, options) {
  var s = parse(version.trim().replace(/^[=v]+/, ''), options)
  return s ? s.version : null
}

exports.SemVer = SemVer

function SemVer (version, options) {
  if (!options || typeof options !== 'object') {
    options = {
      loose: !!options,
      includePrerelease: false
    }
  }
  if (version instanceof SemVer) {
    if (version.loose === options.loose) {
      return version
    } else {
      version = version.version
    }
  } else if (typeof version !== 'string') {
    throw new TypeError('Invalid Version: ' + version)
  }

if (version.length > MAX_LENGTH) {
    throw new TypeError('version is longer than ' + MAX_LENGTH + ' characters')
  }

if (!(this instanceof SemVer)) {
    return new SemVer(version, options)
  }

debug('SemVer', version, options)
  this.options = options
  this.loose = !!options.loose

var m = version.trim().match(options.loose ? re[LOOSE] : re[FULL])

if (!m) {
    throw new TypeError('Invalid Version: ' + version)
  }

this.raw = version

// these are actually numbers
  this.major = +m[1]
  this.minor = +m[2]
  this.patch = +m[3]

if (this.major > MAX_SAFE_INTEGER || this.major < 0) {
    throw new TypeError('Invalid major version')
  }

if (this.minor > MAX_SAFE_INTEGER || this.minor < 0) {
    throw new TypeError('Invalid minor version')
  }

if (this.patch > MAX_SAFE_INTEGER || this.patch < 0) {
    throw new TypeError('Invalid patch version')
  }

// numberify any prerelease numeric ids
  if (!m[4]) {
    this.prerelease = []
  } else {
    this.prerelease = m[4].split('.').map(function (id) {
      if (/^[0-9]+$/.test(id)) {
        var num = +id
        if (num >= 0 && num < MAX_SAFE_INTEGER) {
          return num
        }
      }
      return id
    })
  }

this.build = m[5] ? m[5].split('.') : []
  this.format()
}

SemVer.prototype.format = function () {
  this.version = this.major + '.' + this.minor + '.' + this.patch
  if (this.prerelease.length) {
    this.version += '-' + this.prerelease.join('.')
  }
  return this.version
}

SemVer.prototype.toString = function () {
  return this.version
}

SemVer.prototype.compare = function (other) {
  debug('SemVer.compare', this.version, this.options, other)
  if (!(other instanceof SemVer)) {
    other = new SemVer(other, this.options)
  }

return this.compareMain(other) || this.comparePre(other)
}

SemVer.prototype.compareMain = function (other) {
  if (!(other instanceof SemVer)) {
    other = new SemVer(other, this.options)
  }

return compareIdentifiers(this.major, other.major) ||
         compareIdentifiers(this.minor, other.minor) ||
         compareIdentifiers(this.patch, other.patch)
}

SemVer.prototype.comparePre = function (other) {
  if (!(other instanceof SemVer)) {
    other = new SemVer(other, this.options)
  }

// NOT having a prerelease is > having one
  if (this.prerelease.length && !other.prerelease.length) {
    return -1
  } else if (!this.prerelease.length && other.prerelease.length) {
    return 1
  } else if (!this.prerelease.length && !other.prerelease.length) {
    return 0
  }

var i = 0
  do {
    var a = this.prerelease[i]
    var b = other.prerelease[i]
    debug('prerelease compare', i, a, b)
    if (a === undefined && b === undefined) {
      return 0
    } else if (b === undefined) {
      return 1
    } else if (a === undefined) {
      return -1
    } else if (a === b) {
      continue
    } else {
      return compareIdentifiers(a, b)
    }
  } while (++i)
}

// preminor will bump the version up to the next minor release, and immediately
// down to pre-release. premajor and prepatch work the same way.
SemVer.prototype.inc = function (release, identifier) {
  switch (release) {
    case 'premajor':
      this.prerelease.length = 0
      this.patch = 0
      this.minor = 0
      this.major++
      this.inc('pre', identifier)
      break
    case 'preminor':
      this.prerelease.length = 0
      this.patch = 0
      this.minor++
      this.inc('pre', identifier)
      break
    case 'prepatch':
      // If this is already a prerelease, it will bump to the next version
      // drop any prereleases that might already exist, since they are not
      // relevant at this point.
      this.prerelease.length = 0
      this.inc('patch', identifier)
      this.inc('pre', identifier)
      break
    // If the input is a non-prerelease version, this acts the same as
    // prepatch.
    case 'prerelease':
      if (this.prerelease.length === 0) {
        this.inc('patch', identifier)
      }
      this.inc('pre', identifier)
      break

case 'major':
      // If this is a pre-major version, bump up to the same major version.
      // Otherwise increment major.
      // 1.0.0-5 bumps to 1.0.0
      // 1.1.0 bumps to 2.0.0
      if (this.minor !== 0 ||
          this.patch !== 0 ||
          this.prerelease.length === 0) {
        this.major++
      }
      this.minor = 0
      this.patch = 0
      this.prerelease = []
      break
    case 'minor':
      // If this is a pre-minor version, bump up to the same minor version.
      // Otherwise increment minor.
      // 1.2.0-5 bumps to 1.2.0
      // 1.2.1 bumps to 1.3.0
      if (this.patch !== 0 || this.prerelease.length === 0) {
        this.minor++
      }
      this.patch = 0
      this.prerelease = []
      break
    case 'patch':
      // If this is not a pre-release version, it will increment the patch.
      // If it is a pre-release it will bump up to the same patch version.
      // 1.2.0-5 patches to 1.2.0
      // 1.2.0 patches to 1.2.1
      if (this.prerelease.length === 0) {
        this.patch++
      }
      this.prerelease = []
      break
    // This probably shouldn't be used publicly.
    // 1.0.0 "pre" would become 1.0.0-0 which is the wrong direction.
    case 'pre':
      if (this.prerelease.length === 0) {
        this.prerelease = [0]
      } else {
        var i = this.prerelease.length
        while (--i >= 0) {
          if (typeof this.prerelease[i] === 'number') {
            this.prerelease[i]++
            i = -2
          }
        }
        if (i === -1) {
          // didn't increment anything
          this.prerelease.push(0)
        }
      }
      if (identifier) {
        // 1.2.0-beta.1 bumps to 1.2.0-beta.2,
        // 1.2.0-beta.fooblz or 1.2.0-beta bumps to 1.2.0-beta.0
        if (this.prerelease[0] === identifier) {
          if (isNaN(this.prerelease[1])) {
            this.prerelease = [identifier, 0]
          }
        } else {
          this.prerelease = [identifier, 0]
        }
      }
      break

default:
      throw new Error('invalid increment argument: ' + release)
  }
  this.format()
  this.raw = this.version
  return this
}

exports.inc = inc
function inc (version, release, loose, identifier) {
  if (typeof (loose) === 'string') {
    identifier = loose
    loose = undefined
  }

try {
    return new SemVer(version, loose).inc(release, identifier).version
  } catch (er) {
    return null
  }
}

exports.diff = diff
function diff (version1, version2) {
  if (eq(version1, version2)) {
    return null
  } else {
    var v1 = parse(version1)
    var v2 = parse(version2)
    var prefix = ''
    if (v1.prerelease.length || v2.prerelease.length) {
      prefix = 'pre'
      var defaultResult = 'prerelease'
    }
    for (var key in v1) {
      if (key === 'major' || key === 'minor' || key === 'patch') {
        if (v1[key] !== v2[key]) {
          return prefix + key
        }
      }
    }
    return defaultResult // may be undefined
  }
}

exports.compareIdentifiers = compareIdentifiers

var numeric = /^[0-9]+$/
function compareIdentifiers (a, b) {
  var anum = numeric.test(a)
  var bnum = numeric.test(b)

if (anum && bnum) {
    a = +a
    b = +b
  }

return a === b ? 0
    : (anum && !bnum) ? -1
    : (bnum && !anum) ? 1
    : a < b ? -1
    : 1
}

exports.rcompareIdentifiers = rcompareIdentifiers
function rcompareIdentifiers (a, b) {
  return compareIdentifiers(b, a)
}

exports.major = major
function major (a, loose) {
  return new SemVer(a, loose).major
}

exports.minor = minor
function minor (a, loose) {
  return new SemVer(a, loose).minor
}

exports.patch = patch
function patch (a, loose) {
  return new SemVer(a, loose).patch
}

exports.compare = compare
function compare (a, b, loose) {
  return new SemVer(a, loose).compare(new SemVer(b, loose))
}

exports.compareLoose = compareLoose
function compareLoose (a, b) {
  return compare(a, b, true)
}

exports.rcompare = rcompare
function rcompare (a, b, loose) {
  return compare(b, a, loose)
}

exports.sort = sort
function sort (list, loose) {
  return list.sort(function (a, b) {
    return exports.compare(a, b, loose)
  })
}

exports.rsort = rsort
function rsort (list, loose) {
  return list.sort(function (a, b) {
    return exports.rcompare(a, b, loose)
  })
}

exports.gt = gt
function gt (a, b, loose) {
  return compare(a, b, loose) > 0
}

exports.lt = lt
function lt (a, b, loose) {
  return compare(a, b, loose) < 0
}

exports.eq = eq
function eq (a, b, loose) {
  return compare(a, b, loose) === 0
}

exports.neq = neq
function neq (a, b, loose) {
  return compare(a, b, loose) !== 0
}

exports.gte = gte
function gte (a, b, loose) {
  return compare(a, b, loose) >= 0
}

exports.lte = lte
function lte (a, b, loose) {
  return compare(a, b, loose) <= 0
}

exports.cmp = cmp
function cmp (a, op, b, loose) {
  switch (op) {
    case '===':
      if (typeof a === 'object')
        a = a.version
      if (typeof b === 'object')
        b = b.version
      return a === b

case '!==':
      if (typeof a === 'object')
        a = a.version
      if (typeof b === 'object')
        b = b.version
      return a !== b

case '':
    case '=':
    case '==':
      return eq(a, b, loose)

case '!=':
      return neq(a, b, loose)

case '>':
      return gt(a, b, loose)

case '>=':
      return gte(a, b, loose)

case '<':
      return lt(a, b, loose)

case '<=':
      return lte(a, b, loose)

default:
      throw new TypeError('Invalid operator: ' + op)
  }
}

exports.Comparator = Comparator
function Comparator (comp, options) {
  if (!options || typeof options !== 'object') {
    options = {
      loose: !!options,
      includePrerelease: false
    }
  }

if (comp instanceof Comparator) {
    if (comp.loose === !!options.loose) {
      return comp
    } else {
      comp = comp.value
    }
  }

if (!(this instanceof Comparator)) {
    return new Comparator(comp, options)
  }

debug('comparator', comp, options)
  this.options = options
  this.loose = !!options.loose
  this.parse(comp)

if (this.semver === ANY) {
    this.value = ''
  } else {
    this.value = this.operator + this.semver.version
  }

debug('comp', this)
}

var ANY = {}
Comparator.prototype.parse = function (comp) {
  var r = this.options.loose ? re[COMPARATORLOOSE] : re[COMPARATOR]
  var m = comp.match(r)

if (!m) {
    throw new TypeError('Invalid comparator: ' + comp)
  }

this.operator = m[1]
  if (this.operator === '=') {
    this.operator = ''
  }

// if it literally is just '>' or '' then allow anything.
  if (!m[2]) {
    this.semver = ANY
  } else {
    this.semver = new SemVer(m[2], this.options.loose)
  }
}

Comparator.prototype.toString = function () {
  return this.value
}

Comparator.prototype.test = function (version) {
  debug('Comparator.test', version, this.options.loose)

if (this.semver === ANY) {
    return true
  }

if (typeof version === 'string') {
    version = new SemVer(version, this.options)
  }

return cmp(version, this.operator, this.semver, this.options)
}

Comparator.prototype.intersects = function (comp, options) {
  if (!(comp instanceof Comparator)) {
    throw new TypeError('a Comparator is required')
  }

if (!options || typeof options !== 'object') {
    options = {
      loose: !!options,
      includePrerelease: false
    }
  }

var rangeTmp

if (this.operator === '') {
    rangeTmp = new Range(comp.value, options)
    return satisfies(this.value, rangeTmp, options)
  } else if (comp.operator === '') {
    rangeTmp = new Range(this.value, options)
    return satisfies(comp.semver, rangeTmp, options)
  }

var sameDirectionIncreasing =
    (this.operator === '>=' || this.operator === '>') &&
    (comp.operator === '>=' || comp.operator === '>')
  var sameDirectionDecreasing =
    (this.operator === '<=' || this.operator === '<') &&
    (comp.operator === '<=' || comp.operator === '<')
  var sameSemVer = this.semver.version === comp.semver.version
  var differentDirectionsInclusive =
    (this.operator === '>=' || this.operator === '<=') &&
    (comp.operator === '>=' || comp.operator === '<=')
  var oppositeDirectionsLessThan =
    cmp(this.semver, '<', comp.semver, options) &&
    ((this.operator === '>=' || this.operator === '>') &&
    (comp.operator === '<=' || comp.operator === '<'))
  var oppositeDirectionsGreaterThan =
    cmp(this.semver, '>', comp.semver, options) &&
    ((this.operator === '<=' || this.operator === '<') &&
    (comp.operator === '>=' || comp.operator === '>'))

return sameDirectionIncreasing || sameDirectionDecreasing ||
    (sameSemVer && differentDirectionsInclusive) ||
    oppositeDirectionsLessThan || oppositeDirectionsGreaterThan
}

exports.Range = Range
function Range (range, options) {
  if (!options || typeof options !== 'object') {
    options = {
      loose: !!options,
      includePrerelease: false
    }
  }

if (range instanceof Range) {
    if (range.loose === !!options.loose &&
        range.includePrerelease === !!options.includePrerelease) {
      return range
    } else {
      return new Range(range.raw, options)
    }
  }

if (range instanceof Comparator) {
    return new Range(range.value, options)
  }

if (!(this instanceof Range)) {
    return new Range(range, options)
  }

this.options = options
  this.loose = !!options.loose
  this.includePrerelease = !!options.includePrerelease

// First, split based on boolean or ||
  this.raw = range
  this.set = range.split(/\s*\|\|\s*/).map(function (range) {
    return this.parseRange(range.trim())
  }, this).filter(function (c) {
    // throw out any that are not relevant for whatever reason
    return c.length
  })

if (!this.set.length) {
    throw new TypeError('Invalid SemVer Range: ' + range)
  }

this.format()
}

Range.prototype.format = function () {
  this.range = this.set.map(function (comps) {
    return comps.join(' ').trim()
  }).join('||').trim()
  return this.range
}

Range.prototype.toString = function () {
  return this.range
}

Range.prototype.parseRange = function (range) {
  var loose = this.options.loose
  range = range.trim()
  // `1.2.3 - 1.2.4` => `>=1.2.3 <=1.2.4`
  var hr = loose ? re[HYPHENRANGELOOSE] : re[HYPHENRANGE]
  range = range.replace(hr, hyphenReplace)
  debug('hyphen replace', range)
  // `> 1.2.3 < 1.2.5` => `>1.2.3 <1.2.5`
  range = range.replace(re[COMPARATORTRIM], comparatorTrimReplace)
  debug('comparator trim', range, re[COMPARATORTRIM])

// `~ 1.2.3` => `~1.2.3`
  range = range.replace(re[TILDETRIM], tildeTrimReplace)

// `^ 1.2.3` => `^1.2.3`
  range = range.replace(re[CARETTRIM], caretTrimReplace)

// normalize spaces
  range = range.split(/\s+/).join(' ')

// At this point, the range is completely trimmed and
  // ready to be split into comparators.

var compRe = loose ? re[COMPARATORLOOSE] : re[COMPARATOR]
  var set = range.split(' ').map(function (comp) {
    return parseComparator(comp, this.options)
  }, this).join(' ').split(/\s+/)
  if (this.options.loose) {
    // in loose mode, throw out any that are not valid comparators
    set = set.filter(function (comp) {
      return !!comp.match(compRe)
    })
  }
  set = set.map(function (comp) {
    return new Comparator(comp, this.options)
  }, this)

return set
}

Range.prototype.intersects = function (range, options) {
  if (!(range instanceof Range)) {
    throw new TypeError('a Range is required')
  }

return this.set.some(function (thisComparators) {
    return thisComparators.every(function (thisComparator) {
      return range.set.some(function (rangeComparators) {
        return rangeComparators.every(function (rangeComparator) {
          return thisComparator.intersects(rangeComparator, options)
        })
      })
    })
  })
}

// Mostly just for testing and legacy API reasons
exports.toComparators = toComparators
function toComparators (range, options) {
  return new Range(range, options).set.map(function (comp) {
    return comp.map(function (c) {
      return c.value
    }).join(' ').trim().split(' ')
  })
}

// comprised of xranges, tildes, stars, and gtlt's at this point.
// already replaced the hyphen ranges
// turn into a set of JUST comparators.
function parseComparator (comp, options) {
  debug('comp', comp, options)
  comp = replaceCarets(comp, options)
  debug('caret', comp)
  comp = replaceTildes(comp, options)
  debug('tildes', comp)
  comp = replaceXRanges(comp, options)
  debug('xrange', comp)
  comp = replaceStars(comp, options)
  debug('stars', comp)
  return comp
}

function isX (id) {
  return !id || id.toLowerCase() === 'x' || id === '*'
}

// ~, ~> --> * (any, kinda silly)
// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0
// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0
// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0
// ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0
// ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0
function replaceTildes (comp, options) {
  return comp.trim().split(/\s+/).map(function (comp) {
    return replaceTilde(comp, options)
  }).join(' ')
}

function replaceTilde (comp, options) {
  var r = options.loose ? re[TILDELOOSE] : re[TILDE]
  return comp.replace(r, function (_, M, m, p, pr) {
    debug('tilde', comp, _, M, m, p, pr)
    var ret

if (isX(M)) {
      ret = ''
    } else if (isX(m)) {
      ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0'
    } else if (isX(p)) {
      // ~1.2 == >=1.2.0 <1.3.0
      ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0'
    } else if (pr) {
      debug('replaceTilde pr', pr)
      ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
            ' <' + M + '.' + (+m + 1) + '.0'
    } else {
      // ~1.2.3 == >=1.2.3 <1.3.0
      ret = '>=' + M + '.' + m + '.' + p +
            ' <' + M + '.' + (+m + 1) + '.0'
    }

debug('tilde return', ret)
    return ret
  })
}

// ^ --> * (any, kinda silly)
// ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0
// ^2.0, ^2.0.x --> >=2.0.0 <3.0.0
// ^1.2, ^1.2.x --> >=1.2.0 <2.0.0
// ^1.2.3 --> >=1.2.3 <2.0.0
// ^1.2.0 --> >=1.2.0 <2.0.0
function replaceCarets (comp, options) {
  return comp.trim().split(/\s+/).map(function (comp) {
    return replaceCaret(comp, options)
  }).join(' ')
}

function replaceCaret (comp, options) {
  debug('caret', comp, options)
  var r = options.loose ? re[CARETLOOSE] : re[CARET]
  return comp.replace(r, function (_, M, m, p, pr) {
    debug('caret', comp, _, M, m, p, pr)
    var ret

if (isX(M)) {
      ret = ''
    } else if (isX(m)) {
      ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0'
    } else if (isX(p)) {
      if (M === '0') {
        ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0'
      } else {
        ret = '>=' + M + '.' + m + '.0 <' + (+M + 1) + '.0.0'
      }
    } else if (pr) {
      debug('replaceCaret pr', pr)
      if (M === '0') {
        if (m === '0') {
          ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
                ' <' + M + '.' + m + '.' + (+p + 1)
        } else {
          ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
                ' <' + M + '.' + (+m + 1) + '.0'
        }
      } else {
        ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
              ' <' + (+M + 1) + '.0.0'
      }
    } else {
      debug('no pr')
      if (M === '0') {
        if (m === '0') {
          ret = '>=' + M + '.' + m + '.' + p +
                ' <' + M + '.' + m + '.' + (+p + 1)
        } else {
          ret = '>=' + M + '.' + m + '.' + p +
                ' <' + M + '.' + (+m + 1) + '.0'
        }
      } else {
        ret = '>=' + M + '.' + m + '.' + p +
              ' <' + (+M + 1) + '.0.0'
      }
    }

debug('caret return', ret)
    return ret
  })
}

function replaceXRanges (comp, options) {
  debug('replaceXRanges', comp, options)
  return comp.split(/\s+/).map(function (comp) {
    return replaceXRange(comp, options)
  }).join(' ')
}

function replaceXRange (comp, options) {
  comp = comp.trim()
  var r = options.loose ? re[XRANGELOOSE] : re[XRANGE]
  return comp.replace(r, function (ret, gtlt, M, m, p, pr) {
    debug('xRange', comp, ret, gtlt, M, m, p, pr)
    var xM = isX(M)
    var xm = xM || isX(m)
    var xp = xm || isX(p)
    var anyX = xp

if (gtlt === '=' && anyX) {
      gtlt = ''
    }

if (xM) {
      if (gtlt === '>' || gtlt === '<') {
        // nothing is allowed
        ret = '<0.0.0'
      } else {
        // nothing is forbidden
        ret = '*'
      }
    } else if (gtlt && anyX) {
      // we know patch is an x, because we have any x at all.
      // replace X with 0
      if (xm) {
        m = 0
      }
      p = 0

if (gtlt === '>') {
        // >1 => >=2.0.0
        // >1.2 => >=1.3.0
        // >1.2.3 => >= 1.2.4
        gtlt = '>='
        if (xm) {
          M = +M + 1
          m = 0
          p = 0
        } else {
          m = +m + 1
          p = 0
        }
      } else if (gtlt === '<=') {
        // <=0.7.x is actually <0.8.0, since any 0.7.x should
        // pass.  Similarly, <=7.x is actually <8.0.0, etc.
        gtlt = '<'
        if (xm) {
          M = +M + 1
        } else {
          m = +m + 1
        }
      }

ret = gtlt + M + '.' + m + '.' + p
    } else if (xm) {
      ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0'
    } else if (xp) {
      ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0'
    }

debug('xRange return', ret)

return ret
  })
}

// Because * is AND-ed with everything else in the comparator,
// and '' means "any version", just remove the *s entirely.
function replaceStars (comp, options) {
  debug('replaceStars', comp, options)
  // Looseness is ignored here.  star is always as loose as it gets!
  return comp.trim().replace(re[STAR], '')
}

// This function is passed to string.replace(re[HYPHENRANGE])
// M, m, patch, prerelease, build
// 1.2 - 3.4.5 => >=1.2.0 <=3.4.5
// 1.2.3 - 3.4 => >=1.2.0 <3.5.0 Any 3.4.x will do
// 1.2 - 3.4 => >=1.2.0 <3.5.0
function hyphenReplace ($0,
  from, fM, fm, fp, fpr, fb,
  to, tM, tm, tp, tpr, tb) {
  if (isX(fM)) {
    from = ''
  } else if (isX(fm)) {
    from = '>=' + fM + '.0.0'
  } else if (isX(fp)) {
    from = '>=' + fM + '.' + fm + '.0'
  } else {
    from = '>=' + from
  }

if (isX(tM)) {
    to = ''
  } else if (isX(tm)) {
    to = '<' + (+tM + 1) + '.0.0'
  } else if (isX(tp)) {
    to = '<' + tM + '.' + (+tm + 1) + '.0'
  } else if (tpr) {
    to = '<=' + tM + '.' + tm + '.' + tp + '-' + tpr
  } else {
    to = '<=' + to
  }

return (from + ' ' + to).trim()
}

// if ANY of the sets match ALL of its comparators, then pass
Range.prototype.test = function (version) {
  if (!version) {
    return false
  }

if (typeof version === 'string') {
    version = new SemVer(version, this.options)
  }

for (var i = 0; i < this.set.length; i++) {
    if (testSet(this.set[i], version, this.options)) {
      return true
    }
  }
  return false
}

function testSet (set, version, options) {
  for (var i = 0; i < set.length; i++) {
    if (!set[i].test(version)) {
      return false
    }
  }

if (version.prerelease.length && !options.includePrerelease) {
    // Find the set of versions that are allowed to have prereleases
    // For example, ^1.2.3-pr.1 desugars to >=1.2.3-pr.1 <2.0.0
    // That should allow `1.2.3-pr.2` to pass.
    // However, `1.2.4-alpha.notready` should NOT be allowed,
    // even though it's within the range set by the comparators.
    for (i = 0; i < set.length; i++) {
      debug(set[i].semver)
      if (set[i].semver === ANY) {
        continue
      }

if (set[i].semver.prerelease.length > 0) {
        var allowed = set[i].semver
        if (allowed.major === version.major &&
            allowed.minor === version.minor &&
            allowed.patch === version.patch) {
          return true
        }
      }
    }

// Version has a -pre, but it's not one of the ones we like.
    return false
  }

return true
}

exports.satisfies = satisfies
function satisfies (version, range, options) {
  try {
    range = new Range(range, options)
  } catch (er) {
    return false
  }
  return range.test(version)
}

exports.maxSatisfying = maxSatisfying
function maxSatisfying (versions, range, options) {
  var max = null
  var maxSV = null
  try {
    var rangeObj = new Range(range, options)
  } catch (er) {
    return null
  }
  versions.forEach(function (v) {
    if (rangeObj.test(v)) {
      // satisfies(v, range, options)
      if (!max || maxSV.compare(v) === -1) {
        // compare(max, v, true)
        max = v
        maxSV = new SemVer(max, options)
      }
    }
  })
  return max
}

exports.minSatisfying = minSatisfying
function minSatisfying (versions, range, options) {
  var min = null
  var minSV = null
  try {
    var rangeObj = new Range(range, options)
  } catch (er) {
    return null
  }
  versions.forEach(function (v) {
    if (rangeObj.test(v)) {
      // satisfies(v, range, options)
      if (!min || minSV.compare(v) === 1) {
        // compare(min, v, true)
        min = v
        minSV = new SemVer(min, options)
      }
    }
  })
  return min
}

exports.minVersion = minVersion
function minVersion (range, loose) {
  range = new Range(range, loose)

var minver = new SemVer('0.0.0')
  if (range.test(minver)) {
    return minver
  }

minver = new SemVer('0.0.0-0')
  if (range.test(minver)) {
    return minver
  }

minver = null
  for (var i = 0; i < range.set.length; ++i) {
    var comparators = range.set[i]

comparators.forEach(function (comparator) {
      // Clone to avoid manipulating the comparator's semver object.
      var compver = new SemVer(comparator.semver.version)
      switch (comparator.operator) {
        case '>':
          if (compver.prerelease.length === 0) {
            compver.patch++
          } else {
            compver.prerelease.push(0)
          }
          compver.raw = compver.format()
          /* fallthrough */
        case '':
        case '>=':
          if (!minver || gt(minver, compver)) {
            minver = compver
          }
          break
        case '<':
        case '<=':
          /* Ignore maximum versions */
          break
        /* istanbul ignore next */
        default:
          throw new Error('Unexpected operation: ' + comparator.operator)
      }
    })
  }

if (minver && range.test(minver)) {
    return minver
  }

return null
}

exports.validRange = validRange
function validRange (range, options) {
  try {
    // Return '*' instead of '' so that truthiness works.
    // This will throw if it's invalid anyway
    return new Range(range, options).range || '*'
  } catch (er) {
    return null
  }
}

// Determine if version is less than all the versions possible in the range
exports.ltr = ltr
function ltr (version, range, options) {
  return outside(version, range, '<', options)
}

// Determine if version is greater than all the versions possible in the range.
exports.gtr = gtr
function gtr (version, range, options) {
  return outside(version, range, '>', options)
}

exports.outside = outside
function outside (version, range, hilo, options) {
  version = new SemVer(version, options)
  range = new Range(range, options)

var gtfn, ltefn, ltfn, comp, ecomp
  switch (hilo) {
    case '>':
      gtfn = gt
      ltefn = lte
      ltfn = lt
      comp = '>'
      ecomp = '>='
      break
    case '<':
      gtfn = lt
      ltefn = gte
      ltfn = gt
      comp = '<'
      ecomp = '<='
      break
    default:
      throw new TypeError('Must provide a hilo val of "<" or ">"')
  }

// If it satisifes the range it is not outside
  if (satisfies(version, range, options)) {
    return false
  }

// From now on, variable terms are as if we're in "gtr" mode.
  // but note that everything is flipped for the "ltr" function.

for (var i = 0; i < range.set.length; ++i) {
    var comparators = range.set[i]

var high = null
    var low = null

comparators.forEach(function (comparator) {
      if (comparator.semver === ANY) {
        comparator = new Comparator('>=0.0.0')
      }
      high = high || comparator
      low = low || comparator
      if (gtfn(comparator.semver, high.semver, options)) {
        high = comparator
      } else if (ltfn(comparator.semver, low.semver, options)) {
        low = comparator
      }
    })

// If the edge version comparator has a operator then our version
    // isn't outside it
    if (high.operator === comp || high.operator === ecomp) {
      return false
    }

// If the lowest version comparator has an operator and our version
    // is less than it then it isn't higher than the range
    if ((!low.operator || low.operator === comp) &&
        ltefn(version, low.semver)) {
      return false
    } else if (low.operator === ecomp && ltfn(version, low.semver)) {
      return false
    }
  }
  return true
}

exports.prerelease = prerelease
function prerelease (version, options) {
  var parsed = parse(version, options)
  return (parsed && parsed.prerelease.length) ? parsed.prerelease : null
}

exports.intersects = intersects
function intersects (r1, r2, options) {
  r1 = new Range(r1, options)
  r2 = new Range(r2, options)
  return r1.intersects(r2)
}

exports.coerce = coerce
function coerce (version) {
  if (version instanceof SemVer) {
    return version
  }

if (typeof version !== 'string') {
    return null
  }

var match = version.match(re[COERCE])

if (match == null) {
    return null
  }

return parse(match[1] +
    '.' + (match[2] || '0') +
    '.' + (match[3] || '0'))
}

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