semver.js

"use strict";

var reSemver =
  /^v?((\d+)\.(\d+)\.(\d+))(?:-([\dA-Za-z\-]+(?:\.[\dA-Za-z\-]+)*))?(?:\+([\dA-Za-z\-]+(?:\.[\dA-Za-z\-]+)*))?$/;

module.exports = {
  parseSemver: function (version) {
    var m = reSemver.exec(version) || [];

    if (0 === m.length) {
      return;
    } else {
      return {
        semver: m[0],
        version: m[1],
        major: m[2],
        minor: m[3],
        patch: m[4],
        release: m[5],
        build: m[6],
      };
    }
  },

  stringifySemver: function (obj) {
    var str = "";
    str += obj.major || "0";
    str += ".";
    str += obj.minor || "0";
    str += ".";
    str += obj.patch || "0";
    if (obj.release) {
      str += "-" + obj.release;
    }
    if (obj.build) {
      str += "+" + obj.build;
    }
    return str;
  },
};