Enable extension "do"

lib/models/templateEngine.js

@@ -5,6 +5,9 @@ var TemplateEngine = Immutable.Record({
     // List of {TemplateBlock}
     blocks:     Immutable.List(),
 
+    // List of Extension
+    extensions: Immutable.Map(),
+
     // Map of filters: {String} name -> {Function} fn
     filters:    Immutable.Map(),
 
@@ -42,6 +45,10 @@ TemplateEngine.prototype.getContext = function() {
     return this.get('context');
 };
 
+TemplateEngine.prototype.getExtensions = function() {
+    return this.get('extensions');
+};
+
 /**
     Return a block by its name (or undefined)
 
@@ -66,6 +73,7 @@ TemplateEngine.prototype.toNunjucks = function() {
     var blocks = this.getBlocks();
     var filters = this.getFilters();
     var globals = this.getGlobals();
+    var extensions = this.getExtensions();
 
     var env = new nunjucks.Environment(
         loader,
@@ -103,6 +111,11 @@ TemplateEngine.prototype.toNunjucks = function() {
         env.addGlobal(globalName, globalValue);
     });
 
+    // Add other extensions
+    extensions.forEach(function(ext, extName) {
+        env.addExtension(extName, ext);
+    });
+
     return env;
 };
 
@@ -116,4 +129,21 @@ TemplateEngine.prototype.bindToContext = function(fn) {
     return fn.bind(this.getContext());
 };
 
+/**
+    Create a template engine
+
+    @param {Object} def
+    @return {TemplateEngine}
+*/
+TemplateEngine.create = function(def) {
+    return new TemplateEngine({
+        blocks:     Immutable.List(def.blocks || []),
+        extensions: Immutable.Map(def.extensions || {}),
+        filters:    Immutable.Map(def.filters || {}),
+        globals:    Immutable.Map(def.globals || {}),
+        context:    def.context,
+        loader:     def.loader
+    });
+};
+
 module.exports = TemplateEngine;

lib/output/website/createTemplateEngine.js

@@ -1,4 +1,6 @@
 var path = require('path');
+var nunjucks = require('nunjucks');
+var DoExtension = require('nunjucks-do')(nunjucks);
 
 var TEMPLATES_FOLDER = require('../../constants/templatesFolder');
 
@@ -27,8 +29,11 @@ function createTemplateEngine(output) {
 
     var loader = new Templating.ThemesLoader(tplSearchPaths);
 
-    return new TemplateEngine({
-        loader: loader
+    return TemplateEngine.create({
+        loader: loader,
+        extensions: {
+            'DoExtension': new DoExtension()
+        }
     });
 }