Ensure "template" is always set when rendering a template

lib/output/website/index.js

@@ -154,9 +154,7 @@ WebsiteOutput.prototype.renderAsString = function(tpl, context) {
     // Calcul template name
     var filename = this.templateName(tpl);
 
-    context = _.extend({
-        template: {}
-    }, context, {
+    context = _.extend(context, {
         plugins: {
             resources: this.resources
         },
@@ -167,7 +165,7 @@ WebsiteOutput.prototype.renderAsString = function(tpl, context) {
     // Create environment
     var env = setupTemplateEnv(this, context);
 
-    return Promise.nfcall(env.render.bind(env), filename);
+    return Promise.nfcall(env.render.bind(env), filename, context);
 };
 
 /*

lib/output/website/templateEnv.js

@@ -21,6 +21,11 @@ function templatesPath(dir) {
     @return {Nunjucks.Environment}
 */
 function setupTemplateEnv(output, context) {
+    context = _.defaults(context || {}, {
+        // Required by ThemeLoader
+        template: {}
+    });
+
     var loader = new ThemeLoader(
         _.map(output.searchPaths, templatesPath)
     );
@@ -84,7 +89,6 @@ function setupTemplateEnv(output, context) {
         return location.normalize(href);
     });
 
-
     return env;
 }