minor refactoring in extensions lib, making it easier to read

lib/server/extensions.js

@@ -1,11 +1,11 @@
 'use strict';
 
-var EventEmitter = require('events').EventEmitter,
-    fs = require('fs'),
-    path = require('path'),
-    bundles = require('../bundles'),
-    ExtensionApi = require('../extension_api'),
-    log = require('../logger')('nodecg/lib/server/extensions');
+var EventEmitter = require('events').EventEmitter;
+var fs = require('fs');
+var path = require('path');
+var bundles = require('../bundles');
+var ExtensionApi = require('../extension_api');
+var log = require('../logger')('nodecg/lib/server/extensions');
 
 var extensions = {};
 
@@ -14,33 +14,24 @@ exports = new EventEmitter();
 bundles.on('allLoaded', function(allBundles) {
     log.trace('Starting extension mounting');
 
-    var unsatisfiedDeps = [];
-    function checkBundles(bundle) {
-        bundle.bundleDependencies.forEach(checkBundleDep);
-        log.warn('Extension for bundle %s could not be mounted, as it had unsatisfied dependencies:',
-            bundle.name, unsatisfiedDeps.join(', '));
-        bundles.remove(bundle.name);
-    }
-    function checkBundleDep(dep) {
-        if (extensions.hasOwnProperty(dep)) return;
-        unsatisfiedDeps.push(dep);
-    }
-
     while(allBundles.length > 0) {
         var startLen = allBundles.length;
         for (var i = 0; i < startLen; i++) {
+            // If this bundle does not have an extension, remove it from the list
             if (!allBundles[i].extension) {
                 allBundles.splice(i, 1);
                 break;
             }
 
+            // If this bundle has no dependencies, load it and remove it from the list
             if (!allBundles[i].bundleDependencies) {
                 log.debug('Bundle %s has extension with no dependencies', allBundles[i].name);
                 _loadExtension(allBundles[i]);
                 allBundles.splice(i, 1);
                 break;
             }
 
+            // If this bundle has dependencies, and all of them are satisfied, load it and remove it from the list
             if (_bundleDepsSatisfied(allBundles[i])) {
                 log.debug('Bundle %s has extension with satisfied dependencies', allBundles[i].name);
                 _loadExtension(allBundles[i]);
@@ -51,7 +42,24 @@ bundles.on('allLoaded', function(allBundles) {
 
         var endLen = allBundles.length;
         if (startLen === endLen) {
-            allBundles.forEach(checkBundles);
+            // This block can only ever be entered once, so its safe to define a function here
+            // even though we're inside of a `while` loop.
+            /* jshint -W083 */
+
+            // Any bundles left over must have had unsatisfied dependencies.
+            // Print a warning about each bundle, and what its unsatisfied deps were.
+            // Then, unload the bundle.
+            allBundles.forEach(function (bundle) {
+                var unsatisfiedDeps = [];
+                bundle.bundleDependencies.forEach(function (dep) {
+                    if (extensions.hasOwnProperty(dep)) return;
+                    unsatisfiedDeps.push(dep);
+                });
+                log.warn('Extension for bundle %s could not be mounted, as it had unsatisfied dependencies:',
+                    bundle.name, unsatisfiedDeps.join(', '));
+                bundles.remove(bundle.name);
+            });
+            /*jshint +W083 */
             log.warn('%d bundle(s) could not be loaded, as their dependencies were not satisfied', endLen);
             break;
         }