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