@fto-consult/node-utils/src/compareNPMVersions.js

Bibliothèque d'outils pour application nodeJS

/***
    compare two npm packages versions
    @param {string} current, current version
    @param {string} other, other version
    @param {options} options object : 
    @return {int}, if 0 then versions are equals, if -1 then current are less than other if 1 then current are greater than other
*/
module.exports = function compareNPMVersions(v1, v2, options) {
    v1 = typeof v1 =="string" && v1 || '';
    v2 = typeof v2 =="string" && v2 || "";
    var lexicographical = options && options.lexicographical,
        zeroExtend = options && options.zeroExtend,
        v1parts = v1.split('.'),
        v2parts = v2.split('.');

    function isValidPart(x) {
        return (lexicographical ? /^\d+[A-Za-z]*$/ : /^\d+$/).test(x);
    }

    if (!v1parts.every(isValidPart) || !v2parts.every(isValidPart)) {
        return NaN;
    }

    if (zeroExtend) {
        while (v1parts.length < v2parts.length) v1parts.push("0");
        while (v2parts.length < v1parts.length) v2parts.push("0");
    }

    if (!lexicographical) {
        v1parts = v1parts.map(Number);
        v2parts = v2parts.map(Number);
    }

    for (var i = 0; i < v1parts.length; ++i) {
        if (v2parts.length == i) {
            return 1;
        }

        if (v1parts[i] == v2parts[i]) {
            continue;
        }
        else if (v1parts[i] > v2parts[i]) {
            return 1;
        }
        else {
            return -1;
        }
    }

    if (v1parts.length != v2parts.length) {
        return -1;
    }

    return 0;
}