From 75ec94a87a52a7230c9b7d9b3e150a0da2725e58 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 6 Aug 2017 23:12:27 +0200
Subject: nametransform: add Dir() function

Dir is like filepath.Dir but returns "" instead of ".".
This was already implemented in fusefrontend_reverse as saneDir().

We will need it in nametransform for the improved diriv caching.
---
 internal/nametransform/diriv.go | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'internal/nametransform/diriv.go')

diff --git a/internal/nametransform/diriv.go b/internal/nametransform/diriv.go
index 6746f04..87e7887 100644
--- a/internal/nametransform/diriv.go
+++ b/internal/nametransform/diriv.go
@@ -162,3 +162,12 @@ func (be *NameTransform) EncryptPathDirIV(plainPath string, rootDir string) (cip
 	be.DirIVCache.Store(parentDir, iv, cParentDir)
 	return cipherPath, nil
 }
+
+// Dir is like filepath.Dir but returns "" instead of ".".
+func Dir(path string) string {
+	d := filepath.Dir(path)
+	if d == "." {
+		return ""
+	}
+	return d
+}
-- 
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