Adds ability to customize which promise library to use.

README.md

@@ -29,12 +29,14 @@ template({ foo : 42 }, function (error, html) {
 });
 ```
 
-Example using a promise:
+Example using a promise library such as `bluebird`:
 
 ```
 require('dustjs-loader').register({
-   path    : 'lib/templates',
-   promise : true
+   path : 'lib/templates',
+
+   // Promises library you with to use, please make sure it `npm install` it.
+   promises : 'bluebird'
 });
 
 var template = require('./template.dust');
@@ -48,6 +50,17 @@ template({ foo : 42 })
   });
 ```
 
+Example using ES6 promise:
+
+```
+require('dustjs-loader').register({
+   path : 'lib/templates',
+
+   // Will use promises but won't require any libraries expecting browser to provide.
+   promises : true
+});
+```
+
 ## Dust templates in the browser
 
 The [dustjs-browserify module](https://github.com/scottbrady/dustjs-browserify) makes it easy to use dust templates in the browser.

lib/loader.js

@@ -25,8 +25,8 @@ var fs              = require('fs'),
  * Example using a promise:
  *
  *   require('dustjs-loader').register({
- *      path    : 'lib/templates',
- *      promise : true
+ *      path     : 'lib/templates',
+ *      promises : true // or `bluebird`
  *   });
  *   var template = require('./template.dust');
  *   template({ foo : 42 })
@@ -65,7 +65,11 @@ var DustjsLoader = {
       template = dust.compile(source, name);
 
       if (options.promise) {
-        compiled = DustjsModulize.wrapWithPromise(name, template);
+        throw new Error('dustjs-browserify: `promise` option is deprecated. Please see README.');
+      }
+
+      if (options.promises) {
+        compiled = DustjsModulize.wrapWithPromise(name, template, options.promises);
       } else {
         compiled = DustjsModulize.wrap(name, template);
       }

lib/modulize.js

@@ -14,11 +14,18 @@ module.exports = {
       "}).call(this);\n";
   },
 
-  wrapWithPromise: function(name, template) {
+  wrapWithPromise: function(name, template, promises) {
+    var promisesRequire = '';
+
+    // `true` value indicates user wants ES6 promises or possibly a registered polyfill
+    if (promises && promises !== true) {
+      promisesRequire = "var Promise = require('" + promises + "');\n";
+    }
+
     return "" +
       "(function() {\n" +
-      "  var dust    = require('dustjs-linkedin'),\n" +
-      "      Promise = require('bluebird');\n" +
+      "  var dust = require('dustjs-linkedin');\n" +
+      promisesRequire +
       template +
       "  module.exports = function (context) {\n" +
       "    context.__required = true;\n" +

package.json

@@ -32,7 +32,6 @@
   },
   "homepage": "https://github.com/scottbrady/dustjs-loader",
   "dependencies": {
-    "bluebird": "~2.7.1",
     "dustjs-linkedin": "~2.5.1"
   }
 }