2 files changed, 35 insertions, 3 deletions
diff --git a/lib/utils/path.js b/lib/utils/path.js
index dc97d5d..2d722a5 100644
--- a/lib/utils/path.js
+++ b/lib/utils/path.js
@@ -1,6 +1,11 @@
 var _ = require('lodash');
 var path = require('path');
 
+// Normalize a filename
+function normalizePath(filename) {
+    return path.normalize(filename);
+}
+
 // Return true if file path is inside a folder
 function isInRoot(root, filename) {
     filename = path.normalize(filename);
@@ -17,10 +22,10 @@ function resolveInRoot(root) {
         .slice(1)
         .reduce(function(current, p) {
             // Handle path relative to book root ("/README.md")
-            if (p[0] == "/" || p[0] == "\\") return p.slice(1);
+            if (p[0] == '/' || p[0] == '\\') return p.slice(1);
 
             return current? path.join(current, p) : path.normalize(p);
-        }, "")
+        }, '')
         .value();
 
     result = path.resolve(root, input);
@@ -36,5 +41,6 @@ function resolveInRoot(root) {
 
 module.exports = {
     isInRoot: isInRoot,
-    resolveInRoot: resolveInRoot
+    resolveInRoot: resolveInRoot,
+    normalize: normalizePath
 };
diff --git a/lib/utils/promise.js b/lib/utils/promise.js
new file mode 100644
index 0000000..c25b349
--- /dev/null
+++ b/lib/utils/promise.js
@@ -0,0 +1,26 @@
+var Q = require('q');
+var _ = require('lodash');
+
+// Reduce an array to a promise
+function reduce(arr, iter, base) {
+    return _.reduce(arr, function(prev, elem, i) {
+        return prev.then(function(val) {
+            return iter(val, elem, i);
+        });
+    }, Q(base));
+}
+
+// Transform an array
+function serie(arr, iter, base) {
+    return reduce(arr, function(before, item, i) {
+        return Q(iter(item, i))
+        .then(function(r) {
+            before.push(r);
+            return before;
+        });
+    }, []);
+}
+
+module.exports = Q;
+module.exports.reduce = reduce;
+module.exports.serie = serie;