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const SemVer = require('../classes/semver') const parse = require('./parse') const {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
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