53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
JavaScript
|
const SemVer = require('../classes/semver')
|
||
|
|
const parse = require('./parse')
|
||
|
|
const { safeRe: re, t } = require('../internal/re')
|
||
|
|
|
||
|
|
const coerce = (version, options) => {
|
||
|
|
if (version instanceof SemVer) {
|
||
|
|
return version
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof version === 'number') {
|
||
|
|
version = String(version)
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof version !== 'string') {
|
||
|
|
return null
|
||
|
|
}
|
||
|
|
|
||
|
|
options = options || {}
|
||
|
|
|
||
|
|
let match = null
|
||
|
|
if (!options.rtl) {
|
||
|
|
match = version.match(re[t.COERCE])
|
||
|
|
} else {
|
||
|
|
// Find the right-most coercible string that does not share
|
||
|
|
// a terminus with a more left-ward coercible string.
|
||
|
|
// Eg, '1.2.3.4' wants to coerce '2.3.4', not '3.4' or '4'
|
||
|
|
//
|
||
|
|
// Walk through the string checking with a /g regexp
|
||
|
|
// Manually set the index so as to pick up overlapping matches.
|
||
|
|
// Stop when we get a match that ends at the string end, since no
|
||
|
|
// coercible string can be more right-ward without the same terminus.
|
||
|
|
let next
|
||
|
|
while ((next = re[t.COERCERTL].exec(version)) &&
|
||
|
|
(!match || match.index + match[0].length !== version.length)
|
||
|
|
) {
|
||
|
|
if (!match ||
|
||
|
|
next.index + next[0].length !== match.index + match[0].length) {
|
||
|
|
match = next
|
||
|
|
}
|
||
|
|
re[t.COERCERTL].lastIndex = next.index + next[1].length + next[2].length
|
||
|
|
}
|
||
|
|
// leave it in a clean state
|
||
|
|
re[t.COERCERTL].lastIndex = -1
|
||
|
|
}
|
||
|
|
|
||
|
|
if (match === null) {
|
||
|
|
return null
|
||
|
|
}
|
||
|
|
|
||
|
|
return parse(`${match[2]}.${match[3] || '0'}.${match[4] || '0'}`, options)
|
||
|
|
}
|
||
|
|
module.exports = coerce
|