Merge pull request +15887 from c9/vfs-improve-mkfile

do not call mkdirp unnecessarily when saving files

node_modules/vfs-local/localfs.js

@@ -739,6 +739,8 @@ module.exports = function setup(fsOptions) {
         var resolvedPath = "";
         var mode = options.mode || 0666 & ~umask;
         
+        var createParents = options.parents;
+
         start();
 
         function onData(chunk) {
@@ -772,15 +774,7 @@ module.exports = function setup(fsOptions) {
         }
 
         function start() {
-            if (options.parents) {
-                mkdirP(dirname(path), options, function(err) {
-                    if (err) return error(err);
             resolve();
-                });
-            }
-            else {
-                resolve();
-            }
         }
 
         // Make sure the user has access to the directory and get the real path.
@@ -794,6 +788,13 @@ module.exports = function setup(fsOptions) {
                     // If checkSymlinks is on we'll get an ENOENT when creating a new file.
                     // In that case, just resolve the parent path and go from there.
                     resolvePath(dirname(path), options, function (err, dir) {
+                        if (err && err.code === "ENOENT" && createParents) {
+                            createParents = false;
+                            return mkdirP(dirname(path), options, function(err) {
+                                if (err) return error(err);
+                                resolve();
+                            });
+                        }
                         if (err) return error(err);
                         resolvedPath = join(dir, basename(path));
                         createTempFile();