1 const { MAX_SAFE_COMPONENT_LENGTH } = require('./constants')
2 const debug = require('./debug')
3 exports = module.exports = {}
5 // The actual regexps go on exports.re
6 const re = exports.re = []
7 const src = exports.src = []
8 const t = exports.t = {}
11 const createToken = (name, value, isGlobal) => {
16 re[index] = new RegExp(value, isGlobal ? 'g' : undefined)
19 // The following Regular Expressions can be used for tokenizing,
20 // validating, and parsing SemVer version strings.
22 // ## Numeric Identifier
23 // A single `0`, or a non-zero digit followed by zero or more digits.
25 createToken('NUMERICIDENTIFIER', '0|[1-9]\\d*')
26 createToken('NUMERICIDENTIFIERLOOSE', '[0-9]+')
28 // ## Non-numeric Identifier
29 // Zero or more digits, followed by a letter or hyphen, and then zero or
30 // more letters, digits, or hyphens.
32 createToken('NONNUMERICIDENTIFIER', '\\d*[a-zA-Z-][a-zA-Z0-9-]*')
35 // Three dot-separated numeric identifiers.
37 createToken('MAINVERSION', `(${src[t.NUMERICIDENTIFIER]})\\.` +
38 `(${src[t.NUMERICIDENTIFIER]})\\.` +
39 `(${src[t.NUMERICIDENTIFIER]})`)
41 createToken('MAINVERSIONLOOSE', `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
42 `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
43 `(${src[t.NUMERICIDENTIFIERLOOSE]})`)
45 // ## Pre-release Version Identifier
46 // A numeric identifier, or a non-numeric identifier.
48 createToken('PRERELEASEIDENTIFIER', `(?:${src[t.NUMERICIDENTIFIER]
49 }|${src[t.NONNUMERICIDENTIFIER]})`)
51 createToken('PRERELEASEIDENTIFIERLOOSE', `(?:${src[t.NUMERICIDENTIFIERLOOSE]
52 }|${src[t.NONNUMERICIDENTIFIER]})`)
54 // ## Pre-release Version
55 // Hyphen, followed by one or more dot-separated pre-release version
58 createToken('PRERELEASE', `(?:-(${src[t.PRERELEASEIDENTIFIER]
59 }(?:\\.${src[t.PRERELEASEIDENTIFIER]})*))`)
61 createToken('PRERELEASELOOSE', `(?:-?(${src[t.PRERELEASEIDENTIFIERLOOSE]
62 }(?:\\.${src[t.PRERELEASEIDENTIFIERLOOSE]})*))`)
64 // ## Build Metadata Identifier
65 // Any combination of digits, letters, or hyphens.
67 createToken('BUILDIDENTIFIER', '[0-9A-Za-z-]+')
70 // Plus sign, followed by one or more period-separated build metadata
73 createToken('BUILD', `(?:\\+(${src[t.BUILDIDENTIFIER]
74 }(?:\\.${src[t.BUILDIDENTIFIER]})*))`)
76 // ## Full Version String
77 // A main version, followed optionally by a pre-release version and
80 // Note that the only major, minor, patch, and pre-release sections of
81 // the version string are capturing groups. The build metadata is not a
82 // capturing group, because it should not ever be used in version
85 createToken('FULLPLAIN', `v?${src[t.MAINVERSION]
86 }${src[t.PRERELEASE]}?${
89 createToken('FULL', `^${src[t.FULLPLAIN]}$`)
91 // like full, but allows v1.2.3 and =1.2.3, which people do sometimes.
92 // also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty
93 // common in the npm registry.
94 createToken('LOOSEPLAIN', `[v=\\s]*${src[t.MAINVERSIONLOOSE]
95 }${src[t.PRERELEASELOOSE]}?${
98 createToken('LOOSE', `^${src[t.LOOSEPLAIN]}$`)
100 createToken('GTLT', '((?:<|>)?=?)')
102 // Something like "2.*" or "1.2.x".
103 // Note that "x.x" is a valid xRange identifer, meaning "any version"
104 // Only the first item is strictly required.
105 createToken('XRANGEIDENTIFIERLOOSE', `${src[t.NUMERICIDENTIFIERLOOSE]}|x|X|\\*`)
106 createToken('XRANGEIDENTIFIER', `${src[t.NUMERICIDENTIFIER]}|x|X|\\*`)
108 createToken('XRANGEPLAIN', `[v=\\s]*(${src[t.XRANGEIDENTIFIER]})` +
109 `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
110 `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
111 `(?:${src[t.PRERELEASE]})?${
115 createToken('XRANGEPLAINLOOSE', `[v=\\s]*(${src[t.XRANGEIDENTIFIERLOOSE]})` +
116 `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
117 `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
118 `(?:${src[t.PRERELEASELOOSE]})?${
122 createToken('XRANGE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAIN]}$`)
123 createToken('XRANGELOOSE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAINLOOSE]}$`)
126 // Extract anything that could conceivably be a part of a valid semver
127 createToken('COERCE', `${'(^|[^\\d])' +
128 '(\\d{1,'}${MAX_SAFE_COMPONENT_LENGTH}})` +
129 `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?` +
130 `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?` +
132 createToken('COERCERTL', src[t.COERCE], true)
135 // Meaning is "reasonably at or greater than"
136 createToken('LONETILDE', '(?:~>?)')
138 createToken('TILDETRIM', `(\\s*)${src[t.LONETILDE]}\\s+`, true)
139 exports.tildeTrimReplace = '$1~'
141 createToken('TILDE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAIN]}$`)
142 createToken('TILDELOOSE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAINLOOSE]}$`)
145 // Meaning is "at least and backwards compatible with"
146 createToken('LONECARET', '(?:\\^)')
148 createToken('CARETTRIM', `(\\s*)${src[t.LONECARET]}\\s+`, true)
149 exports.caretTrimReplace = '$1^'
151 createToken('CARET', `^${src[t.LONECARET]}${src[t.XRANGEPLAIN]}$`)
152 createToken('CARETLOOSE', `^${src[t.LONECARET]}${src[t.XRANGEPLAINLOOSE]}$`)
154 // A simple gt/lt/eq thing, or just "" to indicate "any version"
155 createToken('COMPARATORLOOSE', `^${src[t.GTLT]}\\s*(${src[t.LOOSEPLAIN]})$|^$`)
156 createToken('COMPARATOR', `^${src[t.GTLT]}\\s*(${src[t.FULLPLAIN]})$|^$`)
158 // An expression to strip any whitespace between the gtlt and the thing
159 // it modifies, so that `> 1.2.3` ==> `>1.2.3`
160 createToken('COMPARATORTRIM', `(\\s*)${src[t.GTLT]
161 }\\s*(${src[t.LOOSEPLAIN]}|${src[t.XRANGEPLAIN]})`, true)
162 exports.comparatorTrimReplace = '$1$2$3'
164 // Something like `1.2.3 - 1.2.4`
165 // Note that these all use the loose form, because they'll be
166 // checked against either the strict or loose comparator form
168 createToken('HYPHENRANGE', `^\\s*(${src[t.XRANGEPLAIN]})` +
170 `(${src[t.XRANGEPLAIN]})` +
173 createToken('HYPHENRANGELOOSE', `^\\s*(${src[t.XRANGEPLAINLOOSE]})` +
175 `(${src[t.XRANGEPLAINLOOSE]})` +
178 // Star ranges basically just allow anything at all.
179 createToken('STAR', '(<|>)?=?\\s*\\*')
180 // >=0.0.0 is like a star
181 createToken('GTE0', '^\\s*>=\\s*0\.0\.0\\s*$')
182 createToken('GTE0PRE', '^\\s*>=\\s*0\.0\.0-0\\s*$')