refactor migrate readFile logic to mixed depper class

Author: rubeniskov

depper.js

@@ -164,6 +164,16 @@ Depper.prototype.applyTransforms = function(filename, src, transforms, done) {
   }
 }
 
+Depper.prototype.readFile = function(filename, done) {
+  if (path.basename(filename) !== this._inlineName)
+    return this._readFile(filename, done)
+
+  if(this._async) {
+    return done(null, this._inlineSource)
+  }
+  return this._inlineSource
+}
+
 function createDefaultRead(async) {
   if (async) {
     return function defaultRead(src, done) {

index.js

@@ -122,13 +122,6 @@ DepperAsync.prototype.add = function(filename, done) {
   }
 }
 
-DepperAsync.prototype.readFile = function(filename, done) {
-  if (path.basename(filename) !== this._inlineName)
-    return this._readFile(filename, done)
-
-  return done(null, this._inlineSource)
-}
-
 /**
  * Determines which transforms to use for a particular file.
  * The rules here are the same you see in browserify:

sync.js

@@ -98,13 +98,6 @@ DepperSync.prototype.add = function(filename) {
   }
 }
 
-DepperSync.prototype.readFile = function(filename) {
-  if (path.basename(filename) !== this._inlineName)
-    return this._readFile(filename)
-
-  return this._inlineSource
-}
-
 /**
  * Determines which transforms to use for a particular file.
  * The rules here are the same you see in browserify: