Load plugins once

lib/output/base.js

@@ -15,8 +15,9 @@ to output "something".
 The process is mostly on the behavior of "onPage" and "onAsset"
 */
 
-function Output(book, opts) {
+function Output(book, opts, parent) {
     _.bindAll(this);
+    this.parent = parent;
 
     this.opts = _.defaults(opts || {}, {
         directoryIndex: true
@@ -26,7 +27,11 @@ function Output(book, opts) {
     this.log = this.book.log;
 
     // Create plugins manager
-    this.plugins = new PluginsManager(this.book);
+    if (this.parent) {
+        this.plugins = this.parent.plugins;
+    } else {
+        this.plugins = new PluginsManager(this.book);
+    }
 
     // Create template engine
     this.template = new TemplateEngine(this);
@@ -47,7 +52,7 @@ Output.prototype.generate = function() {
 
     // Load all plugins
     .then(function() {
-        return that.plugins.loadAll()
+        return Promise(that.parent? null: that.plugins.loadAll())
         .then(function() {
             that.template.addFilters(that.plugins.getFilters());
             that.template.addBlocks(that.plugins.getBlocks());
@@ -191,7 +196,7 @@ Output.prototype.onResolveTemplate = function(from, to) {
 
 // Prepare output for a language book
 Output.prototype.onLanguageBook = function(book) {
-    return new this.constructor(book, this.opts);
+    return new this.constructor(book, this.opts, this);
 };