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Filename :
semver.js
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const debug = require('../internal/debug') const { MAX_LENGTH, MAX_SAFE_INTEGER } = require('../internal/constants') const { re, t } = require('../internal/re') const parseOptions = require('../internal/parse-options') const { compareIdentifiers } = require('../internal/identifiers') class SemVer { constructor (version, options) { options = parseOptions(options) if (version instanceof SemVer) { if (version.loose === !!options.loose && version.includePrerelease === !!options.includePrerelease) { 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` ) } debug('SemVer', version, options) this.options = options this.loose = !!options.loose // this isn't actually relevant for versions, but keep it so that we // don't run into trouble passing this.options around. this.includePrerelease = !!options.includePrerelease const m = version.trim().match(options.loose ? re[t.LOOSE] : re[t.FULL]) if (!m) { throw new TypeError(`Invalid Version: ${version}`) } this.raw = version // these are actually numbers this.major = +m[1] this.minor = +m[2] this.patch = +m[3] if (this.major > MAX_SAFE_INTEGER || this.major < 0) { throw new TypeError('Invalid major version') } if (this.minor > MAX_SAFE_INTEGER || this.minor < 0) { throw new TypeError('Invalid minor version') } if (this.patch > MAX_SAFE_INTEGER || this.patch < 0) { throw new TypeError('Invalid patch version') } // numberify any prerelease numeric ids if (!m[4]) { this.prerelease = [] } else { this.prerelease = m[4].split('.').map((id) => { if (/^[0-9]+$/.test(id)) { const num = +id if (num >= 0 && num < MAX_SAFE_INTEGER) { return num } } return id }) } this.build = m[5] ? m[5].split('.') : [] this.format() } format () { this.version = `${this.major}.${this.minor}.${this.patch}` if (this.prerelease.length) { this.version += `-${this.prerelease.join('.')}` } return this.version } toString () { return this.version } compare (other) { debug('SemVer.compare', this.version, this.options, other) if (!(other instanceof SemVer)) { if (typeof other === 'string' && other === this.version) { return 0 } other = new SemVer(other, this.options) } if (other.version === this.version) { return 0 } return this.compareMain(other) || this.comparePre(other) } compareMain (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) ) } comparePre (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 } let i = 0 do { const a = this.prerelease[i] const 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) } compareBuild (other) { if (!(other instanceof SemVer)) { other = new SemVer(other, this.options) } let i = 0 do { const a = this.build[i] const b = other.build[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. inc (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 { let 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 (compareIdentifiers(this.prerelease[0], identifier) === 0) { 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 } } module.exports = SemVer