3 files changed, 29 insertions, 4 deletions
diff --git a/lib/book.js b/lib/book.js
index 913df2f..fd20a94 100644
--- a/lib/book.js
+++ b/lib/book.js
@@ -13,6 +13,12 @@ var Page = require('./backbone/page');
 var pathUtil = require('./utils/path');
 var Promise = require('./utils/promise');
 
+
+/*
+The Book class is an interface for parsing books content.
+It does not require to run on Node.js, isnce it only depends on the fs implementation
+*/
+
 function Book(opts) {
     if (!(this instanceof Book)) return new Book(opts);
 
diff --git a/lib/fs/node.js b/lib/fs/node.js
index 28383cf..5994c2e 100644
--- a/lib/fs/node.js
+++ b/lib/fs/node.js
@@ -1,7 +1,7 @@
 var _ = require('lodash');
 var util = require('util');
 var path = require('path');
-var fs = require('fs');
+var fs = require('graceful-fs');
 var mkdirp = require('mkdirp');
 
 var Promise = require('../utils/promise');
diff --git a/lib/output.js b/lib/output.js
index 01610c6..2fb3938 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -1,6 +1,8 @@
 var _ = require('lodash');
-var fs = require('fs');
+var fs = require('graceful-fs');
+var mkdirp = require('mkdirp');
 var Ignore = require('ignore');
+var path = require('path');
 
 var Promise = require('./utils/promise');
 var pathUtil = require('./utils/path');
@@ -29,16 +31,28 @@ function Output(book, type) {
     ]));
 }
 
+// Return path to the root folder
+Output.prototype.root = function(filename) {
+    return path.resolve(process.cwd(), this.book.config.get('output'));
+};
 
 // Resolve a file in the output directory
 Output.prototype.resolve = function(filename) {
-    return pathUtil.resolveInRoot.apply(null, [this.book.config.get('output')].concat(_.toArray(arguments)));
+    return pathUtil.resolveInRoot.apply(null, [this.root()].concat(_.toArray(arguments)));
 };
 
 // Write a file/buffer to the output folder
 Output.prototype.writeFile = function(filename, buf) {
     filename = this.resolve(filename);
-    return Promise.nfcall(fs.writeFile, filename, buf);
+    var folder = path.dirname(filename);
+
+    // Ensure fodler exists
+    return Promise.nfcall(mkdirp, folder)
+
+    // Write the file
+    .then(function() {
+        return Promise.nfcall(fs.writeFile, filename, buf);
+    });
 };
 
 // Start the generation, for a parsed book
@@ -57,6 +71,11 @@ Output.prototype.generate = function() {
         return that.plugins.load(plugins);
     })
 
+    // Create the output folder
+    .then(function() {
+        return Promise.nfcall(mkdirp, that.root());
+    })
+
     // Initialize the generation
     .then(function() {
         return that.generator.prepare();