Merge pull request #32 from popomore/clone

improve clone

.gitignore

@@ -3,4 +3,5 @@
 node_modules
 build
 *.node
-components
+components
+coverage

.jshintignore

@@ -0,0 +1,2 @@
+node_modules
+coverage

.jshintrc

@@ -0,0 +1,36 @@
+{
+  "indent": 2,
+  "smarttabs": true,
+  "latedef": "nofunc",
+  "undef": true,
+  "unused": true,
+  "trailing": true,
+  "laxcomma": false,
+  "eqeqeq": true,
+  "eqnull": true,
+  "boss": true,
+  "expr": true,
+  "sub": true,
+  "newcap": true,
+  "quotmark": true,
+  "loopfunc": true,
+  "lastsemic": true,
+  "funcscope": true,
+  "browser": true,
+  "nonstandard": true,
+  "jquery": true,
+  "devel": true,
+  "node": true,
+  "esnext": true,
+  "globals": {
+    "describe": false,
+    "xdescribe": false,
+    "it": false,
+    "xit": false,
+    "before": false,
+    "beforeEach": false,
+    "after": false,
+    "afterEach": false,
+    "define": false
+  }
+}

index.js

@@ -1,14 +1,17 @@
 var path = require('path');
 
+var clone;
+try {
+  clone = require('node-v8-clone').clone;
+} catch(e) {
+  clone = require('lodash').clone;
+}
 var cloneStats = require('clone-stats');
-var _ = require('lodash');
-var cloneDeep = _.cloneDeep;
-
+var cloneBuffer = require('./lib/cloneBuffer');
 var isBuffer = require('./lib/isBuffer');
 var isStream = require('./lib/isStream');
 var isNull = require('./lib/isNull');
 var inspectStream = require('./lib/inspectStream');
-var cloneBuffer = require('./lib/cloneBuffer');
 
 function File(file) {
   if (!file) file = {};
@@ -45,19 +48,34 @@ File.prototype.isDirectory = function() {
   return this.isNull() && this.stat && this.stat.isDirectory();
 };
 
-File.prototype.clone = function() {
-  var clone = new File();
+File.prototype.clone = function(opt) {
+  if (typeof opt === 'boolean') {
+    opt = {
+      deep: opt,
+      contents: true
+    };
+  } else if (!opt) {
+    opt = {
+      deep: false,
+      contents: true
+    };
+  } else {
+    opt.deep = opt.deep === true;
+    opt.contents = opt.contents !== false;
+  }
+
+  var file = new File();
 
   Object.keys(this).forEach(function(key) {
     if (key !== '_contents' && key !== 'stat') {
-      clone[key] = cloneDeep(this[key]);
+      file[key] = opt.deep === true ? clone(this[key], true) : this[key];
     }
   }, this);
 
-  clone.contents = this.isBuffer() ? cloneBuffer(this.contents) : this.contents;
-  clone.stat = this.stat ? cloneStats(this.stat) : null;
+  file.contents = opt.contents && this.isBuffer() ? cloneBuffer(this.contents) : this.contents;
+  file.stat = this.stat ? cloneStats(this.stat) : null;
 
-  return clone;
+  return file;
 };
 
 File.prototype.pipe = function(stream, opt) {
@@ -110,7 +128,7 @@ Object.defineProperty(File.prototype, 'contents', {
   },
   set: function(val) {
     if (!isBuffer(val) && !isStream(val) && !isNull(val)) {
-      throw new Error("File.contents can only be a Buffer, a Stream, or null.");
+      throw new Error('File.contents can only be a Buffer, a Stream, or null.');
     }
     this._contents = val;
   }

lib/cloneBuffer.js

@@ -4,4 +4,4 @@ module.exports = function(buf) {
   var out = new Buffer(buf.length);
   buf.copy(out);
   return out;
-};
+};

lib/inspectStream.js

@@ -1,12 +1,11 @@
-var Stream = require('stream').Stream;
 var isStream = require('./isStream');
 
 module.exports = function(stream) {
   if (!isStream(stream)) return;
-  
+
   var streamType = stream.constructor.name;
   // avoid StreamStream
   if (streamType === 'Stream') streamType = '';
 
   return '<'+streamType+'Stream>';
-};
+};

lib/isNull.js

@@ -1,3 +1,3 @@
 module.exports = function(v) {
   return v === null;
-};
+};

package.json

@@ -22,8 +22,11 @@
     "lodash.templatesettings": "^2.4.1",
     "event-stream": "^3.1.0"
   },
+  "optionalDependencies": {
+    "node-v8-clone": "~0.6.2"
+  },
   "scripts": {
-    "test": "mocha --reporter spec && jshint . --exclude node_modules",
+    "test": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter spec && jshint .",
     "coveralls": "istanbul cover _mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage"
   },
   "engines": {