59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
|
const parse = require('./parse.js')
|
||
|
|
|
||
|
|
const diff = (version1, version2) => {
|
||
|
|
const v1 = parse(version1, null, true)
|
||
|
|
const v2 = parse(version2, null, true)
|
||
|
|
const comparison = v1.compare(v2)
|
||
|
|
|
||
|
|
if (comparison === 0) {
|
||
|
|
return null
|
||
|
|
}
|
||
|
|
|
||
|
|
const v1Higher = comparison > 0
|
||
|
|
const highVersion = v1Higher ? v1 : v2
|
||
|
|
const lowVersion = v1Higher ? v2 : v1
|
||
|
|
const highHasPre = !!highVersion.prerelease.length
|
||
|
|
const lowHasPre = !!lowVersion.prerelease.length
|
||
|
|
|
||
|
|
if (lowHasPre && !highHasPre) {
|
||
|
|
// Going from prerelease -> no prerelease requires some special casing
|
||
|
|
|
||
|
|
// If the low version has only a major, then it will always be a major
|
||
|
|
// Some examples:
|
||
|
|
// 1.0.0-1 -> 1.0.0
|
||
|
|
// 1.0.0-1 -> 1.1.1
|
||
|
|
// 1.0.0-1 -> 2.0.0
|
||
|
|
if (!lowVersion.patch && !lowVersion.minor) {
|
||
|
|
return 'major'
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the main part has no difference
|
||
|
|
if (lowVersion.compareMain(highVersion) === 0) {
|
||
|
|
if (lowVersion.minor && !lowVersion.patch) {
|
||
|
|
return 'minor'
|
||
|
|
}
|
||
|
|
return 'patch'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// add the `pre` prefix if we are going to a prerelease version
|
||
|
|
const prefix = highHasPre ? 'pre' : ''
|
||
|
|
|
||
|
|
if (v1.major !== v2.major) {
|
||
|
|
return prefix + 'major'
|
||
|
|
}
|
||
|
|
|
||
|
|
if (v1.minor !== v2.minor) {
|
||
|
|
return prefix + 'minor'
|
||
|
|
}
|
||
|
|
|
||
|
|
if (v1.patch !== v2.patch) {
|
||
|
|
return prefix + 'patch'
|
||
|
|
}
|
||
|
|
|
||
|
|
// high and low are preleases
|
||
|
|
return 'prerelease'
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = diff
|