tiny-updater/dist/compare.js

A small update notifier for NPM packages, useful for CLI apps.

/**
 * This software is released under the MIT license:
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
/* MAIN */
// The following is just a slightly modified version of semver-compare
const compare = (a, b) => {
    const pa = a.split('.');
    const pb = b.split('.');
    for (let i = 0; i < 3; i++) {
        let na = Number(pa[i]);
        let nb = Number(pb[i]);
        if (na > nb)
            return 1;
        if (nb > na)
            return -1;
        if (!isNaN(na) && isNaN(nb))
            return 1;
        if (isNaN(na) && !isNaN(nb))
            return -1;
    }
    return 0;
};
/* EXPORT */
export default compare;