PutNode creates intermediary nodes

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

mfs/ops.go

@@ -89,6 +89,10 @@ func lookupDir(r *Root, path string) (*Directory, error) {
 // PutNode inserts 'nd' at 'path' in the given mfs
 func PutNode(r *Root, path string, nd *dag.Node) error {
 	dirp, filename := gopath.Split(path)
+	err := Mkdir(r, dirp, true)
+	if err != nil {
+		return err
+	}
 
 	pdir, err := lookupDir(r, dirp)
 	if err != nil {
@@ -116,7 +120,10 @@ func Mkdir(r *Root, pth string, parents bool) error {
 
 	if len(parts) == 0 {
 		// this will only happen on 'mkdir /'
-		return fmt.Errorf("cannot mkdir '%s'", pth)
+		if parents {
+			return nil
+		}
+		return fmt.Errorf("cannot create directory '/': Already exists")
 	}
 
 	cur := r.GetValue().(*Directory)