code cleanups in dest logic

lib/dest/writeContents/index.js

@@ -6,53 +6,50 @@ var writeStream = require('./writeStream');
 var writeBuffer = require('./writeBuffer');
 
 function writeContents(writePath, file, cb) {
-  var written = function(err) {
-    var done = function(err) {
-      cb(err, file);
-    };
-    if (err) {
-      return done(err);
-    }
-
-    if (!file.stat || typeof file.stat.mode !== 'number') {
-      return done();
-    }
-
-    fs.stat(writePath, function(err, st) {
-      if (err) {
-        return done(err);
-      }
-      // octal 7777 = decimal 4095
-      var currentMode = (st.mode & 4095);
-      if (currentMode === file.stat.mode) {
-        return done();
-      }
-      fs.chmod(writePath, file.stat.mode, done);
-    });
-  };
-
   // if directory then mkdirp it
   if (file.isDirectory()) {
-    writeDir(writePath, file, written);
-    return;
+    return writeDir(writePath, file, written);
   }
 
   // stream it to disk yo
   if (file.isStream()) {
-    writeStream(writePath, file, written);
-    return;
+    return writeStream(writePath, file, written);
   }
 
   // write it like normal
   if (file.isBuffer()) {
-    writeBuffer(writePath, file, written);
-    return;
+    return writeBuffer(writePath, file, written);
   }
 
   // if no contents then do nothing
   if (file.isNull()) {
-    cb(null, file);
-    return;
+    return complete();
+  }
+
+  function complete(err) {
+    cb(err, file);
+  }
+
+  function written(err) {
+    if (err) {
+      return complete(err);
+    }
+
+    if (!file.stat || typeof file.stat.mode !== 'number') {
+      return complete();
+    }
+
+    fs.stat(writePath, function(err, st) {
+      if (err) {
+        return complete(err);
+      }
+      // octal 7777 = decimal 4095
+      var currentMode = (st.mode & 4095);
+      if (currentMode === file.stat.mode) {
+        return complete();
+      }
+      fs.chmod(writePath, file.stat.mode, complete);
+    });
   }
 }