npm-consider/lib/satisfies.js

Check npm package dependencies, stats and impact on your package before installing it

/**
 * @file checks if spdx expressions are matching
 */
const spdxSatisfies = require('spdx-satisfies');
const correct = require('spdx-correct');

/**
 * @param  {string} a spdx
 * @param  {string} b spdx
 * @return {boolean}   [description]
 */
module.exports = function satisfies(a, b) {
  if (a === b) {
    return true;
  }
  const ac = correct(a);
  const bc = correct(b);
  if (!ac || !bc) {
    return false;
  }
  try {
    //  TODO fails at W3C-20150513
    return spdxSatisfies(ac, bc);
  } catch (e) {
    // console.log(a, b, e);
    //  dummy fallback
    return ac === bc;
  }
};