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const SemVer = require('../classes/semver')
const Range = require('../classes/range')
const gt = require('../functions/gt')
const minVersion = (range, loose) => {
range = new Range(range, loose)
let minver = new SemVer('0.0.0')
if (range.test(minver)) {
return minver
}
minver = new SemVer('0.0.0-0')
if (range.test(minver)) {
return minver
}
minver = null
for (let i = 0; i < range.set.length; ++i) {
const comparators = range.set[i]
let setMin = null
comparators.forEach((comparator) => {
// Clone to avoid manipulating the comparator's semver object.
const compver = new SemVer(comparator.semver.version)
switch (comparator.operator) {
case '>':
if (compver.prerelease.length === 0) {
compver.patch++
} else {
compver.prerelease.push(0)
}
compver.raw = compver.format()
/* fallthrough */
case '':
case '>=':
if (!setMin || gt(compver, setMin)) {
setMin = compver
}
break
case '<':
case '<=':
/* Ignore maximum versions */
break
/* istanbul ignore next */
default:
throw new Error(`Unexpected operation: ${comparator.operator}`)
}
})
if (setMin && (!minver || gt(minver, setMin))) {
minver = setMin
}
}
if (minver && range.test(minver)) {
return minver
}
return null
}
module.exports = minVersion