@netlify/build/lib/utils/semver.js

Netlify build module

import semver from 'semver';
// Compare two versions by their major versions.
// Takes into account the special rules for `0.*.*` and `0.0.*` versions.
export const isPreviousMajor = function (versionA, versionB) {
    return semver.lt(getMajor(versionA), getMajor(versionB));
};
// Remove minor/patch numbers
const getMajor = function (version) {
    return semver.minVersion(getMajorVersion(version)).version;
};
// According to semver, the second number is the major release number for
// `0.*.*` versions and the third for `0.0.*`. This is how `^` behaves with the
// `semver` module which is used by `npm`.
export const getMajorVersion = function (version) {
    if (!version || semver.clean(version) === null) {
        return;
    }
    const majorVersion = semver.major(version);
    if (majorVersion !== 0) {
        return `${majorVersion}`;
    }
    const minorVersion = semver.minor(version);
    if (minorVersion !== 0) {
        return `${majorVersion}.${minorVersion}`;
    }
    const patchVersion = semver.patch(version);
    return `${majorVersion}.${minorVersion}.${patchVersion}`;
};
export const isPrerelease = function (version) {
    return semver.prerelease(version);
};