@jsdevtools/npm-publish/lib/compare-and-publish/compare-versions.js

Fast, easy publishing to NPM

import semverDifference from "semver/functions/diff.js";
import semverGreaterThan from "semver/functions/gt.js";
import semverValid from "semver/functions/valid.js";
import { STRATEGY_ALL } from "../options.js";
import { DIFFERENT, INITIAL } from "../results.js";
/**
 * Compare previously published versions with the package's current version.
 *
 * @param currentVersion The current package version.
 * @param publishedVersions The versions that have already been published.
 * @param options Configuration options
 * @returns The release type and previous version.
 */
export function compareVersions(currentVersion, publishedVersions, options) {
    const { versions, "dist-tags": tags } = publishedVersions ?? {};
    const { strategy, tag: publishTag } = options;
    const oldVersion = semverValid(tags?.[publishTag.value]) ?? undefined;
    const isUnique = !versions?.includes(currentVersion);
    let type;
    if (isUnique) {
        if (!oldVersion) {
            type = INITIAL;
        }
        else if (semverGreaterThan(currentVersion, oldVersion)) {
            type = semverDifference(currentVersion, oldVersion) ?? DIFFERENT;
        }
        else if (strategy.value === STRATEGY_ALL) {
            type = DIFFERENT;
        }
    }
    return { type, oldVersion };
}
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