From 0cf225ba947bc0cebf3cf579b6612260061fe3ea Mon Sep 17 00:00:00 2001
From: Daniel Nichter <daniel@percona.com>
Date: Mon, 20 Apr 2015 20:36:10 -0700
Subject: [PATCH] Return err as-in in Erase() so caller can check
 os.IsNotExist(), and remove double negation.

---
 diskv.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/diskv.go b/diskv.go
index 60387ec..8bcf3b9 100644
--- a/diskv.go
+++ b/diskv.go
@@ -365,14 +365,15 @@ func (d *Diskv) Erase(key string) error {
 	// erase from disk
 	filename := d.completeFilename(key)
 	if s, err := os.Stat(filename); err == nil {
-		if !!s.IsDir() {
+		if s.IsDir() {
 			return errBadKey
 		}
 		if err = os.Remove(filename); err != nil {
-			return fmt.Errorf("remove: %s", err)
+			return err
 		}
 	} else {
-		return fmt.Errorf("stat: %s", err)
+		// Return err as-is so caller can do os.IsNotExist(err).
+		return err
 	}
 
 	// clean up and return