nw-builder option.versions as a range

option-versions-as-range.js

var semver = require('semver');
var NwVersions = require('nw-builder/lib/versions');
var nwDownloadUrl = 'http://dl.nwjs.io/';

function findNwVersion(version) {
  
  return new Promise(function(resolve, reject) {
    
    NwVersions.getVersions(nwDownloadUrl)
      .then(function(versions) {
          
          var satisfying = semver.maxSatisfying(versions,version);
          
          if (satisfying !== null) {
            resolve(satisfying);
          }
          else {
            reject('No nw version for ' + version + ' found in ' + versions);
          }
      })
      .catch(function(err) {
        reject(err);  
      });   
  });
}

function test_nwversions() {
  
  var test = function(v) { 
    return function(x) { console.log("version",v,"result",x); };
  };
  
  findNwVersion("apple").then(test("apple"),test("apple")); // No nw version for apple
  findNwVersion("0.11.5").then(test("0.11.5"),test("0.11.5")); // 0.11.5
  findNwVersion("^0.11.5").then(test("^0.11.5"),test("^0.11.5")); // 0.11.6
  findNwVersion("0.12.3").then(test("0.12.3"),test("0.12.3")); // 0.12.3
  findNwVersion("^0.12.3").then(test("^0.12.3"),test("^0.12.3")); // 0.12.3
}