Merged pull request #4 from defrex/master.

added copyDirRecursive and rmdirRecursive, courtesy of @defrex

lib/wrench.js

@@ -1,5 +1,5 @@
 /*  wrench.js
- *  
+ *
  *  A collection of various utility functions I've found myself in need of
  *  for use with Node.js (http://nodejs.org/). This includes things like:
  *
@@ -16,7 +16,7 @@
 var fs = require("fs");
 
 /*  wrench.rmdirSyncRecursive("directory_path");
- *  
+ *
  *  Recursively dives through directories and obliterates everything about it. This is a
  *  Sync-function, which blocks things until it's done. No idea why anybody would want an
  *  Asynchronous version. :\
@@ -28,7 +28,7 @@ exports.rmdirSyncRecursive = function(path) {
     /*  Loop through and delete everything in the sub-tree after checking it */
     for(var i = 0; i < files.length; i++) {
         var currFile = fs.statSync(currDir + "/" + files[i]);
-        
+
         if(currFile.isDirectory()) // Recursive function back to the beginning
             exports.rmdirSyncRecursive(currDir + "/" + files[i]);
 
@@ -111,3 +111,79 @@ exports.chmodSyncRecursive = function(sourceDir, filemode) {
     /*  Finally, chmod the parent directory */
     fs.chmod(sourceDir, filemode);
 };
+
+
+
+/*  wrench.rmdirRecursive("directory_path", callback);
+ *
+ *  Recursively dives through directories and obliterates everything about it.
+ */
+exports.rmdirRecursive = function rmdirRecursive(dir, clbk){
+    fs.readdir(dir, function(err, files){
+        if (err) return clbk(err);
+        (function rmFile(err){
+            if (err) return clbk(err);
+
+            var filename = files.shift();
+            if (filename === null || typeof filename == 'undefined')
+                return fs.rmdir(dir, clbk);
+
+            var file = dir+'/'+filename;
+            fs.stat(file, function(err, stat){
+                if (err) return clbk(err);
+                if (stat.isDirectory())
+                    rmdirRecursive(file, rmFile);
+                else
+                    fs.unlink(file, rmFile);
+            });
+        })();
+    });
+};
+
+/*  wrench.copyDirRecursive("directory_to_copy", "new_location", callback);
+ *
+ *  Recursively dives through a directory and moves all its files to a new
+ *  location.
+ *
+ *  Note: Directories should be passed to this function without a trailing slash.
+ */
+exports.copyDirRecursive = function copyDirRecursive(srcDir, newDir, clbk) {
+    fs.stat(newDir, function(err, newDirStat){
+        if (!err) return exports.rmdirRecursive(newDir, function(err){
+            copyDirRecursive(srcDir, newDir, clbk);
+        });
+
+        fs.stat(srcDir, function(err, srcDirStat){
+            if (err) return clbk(err);
+            fs.mkdir(newDir, srcDirStat.mode, function(err){
+                if (err) return clbk(err);
+                fs.readdir(srcDir, function(err, files){
+                    if (err) return clbk(err);
+                    (function copyFiles(err){
+                        if (err) return clbk(err);
+
+                        var filename = files.shift();
+                        if (filename === null || typeof filename == 'undefined')
+                            return clbk();
+
+                        var file = srcDir+'/'+filename,
+                            newFile = newDir+'/'+filename;
+
+                        fs.stat(file, function(err, fileStat){
+                            if (fileStat.isDirectory())
+                                copyDirRecursive(file, newFile, copyFiles);
+                            else if (fileStat.isSymbolicLink())
+                                fs.readlink(file, function(err, link){
+                                    fs.symlink(link, newFile, copyFiles);
+                                });
+                            else
+                                fs.readFile(file, function(err, data){
+                                    fs.writeFile(newFile, data, copyFiles);
+                                });
+                        });
+                    })();
+                });
+            });
+        });
+    });
+};