@fedify/fedify
Version:
An ActivityPub server framework
42 lines (41 loc) • 1.44 kB
JavaScript
import { compareIdentifier } from "./_shared.js";
/**
* Returns difference between two SemVers by the release type,
* or `undefined` if the SemVers are the same.
*
* @example Usage
* ```ts
* import { parse, difference } from "@std/semver";
* import { assertEquals } from "@std/assert";
*
* const version1 = parse("1.2.3");
* const version2 = parse("1.2.4");
* const version3 = parse("1.3.0");
* const version4 = parse("2.0.0");
*
* assertEquals(difference(version1, version2), "patch");
* assertEquals(difference(version1, version3), "minor");
* assertEquals(difference(version1, version4), "major");
* assertEquals(difference(version1, version1), undefined);
* ```
*
* @param version1 The first SemVer to compare
* @param version2 The second SemVer to compare
* @returns The release type difference or `undefined` if the versions are the same
*/
export function difference(version1, version2) {
const hasPrerelease = version1.prerelease?.length ||
version2.prerelease?.length;
if (version1.major !== version2.major) {
return hasPrerelease ? "premajor" : "major";
}
if (version1.minor !== version2.minor) {
return hasPrerelease ? "preminor" : "minor";
}
if (version1.patch !== version2.patch) {
return hasPrerelease ? "prepatch" : "patch";
}
if (compareIdentifier(version1.prerelease, version2.prerelease) !== 0) {
return "prerelease";
}
}