From 72dc9b0e830824b439a32555d0cba5b8bdb4093f Mon Sep 17 00:00:00 2001
From: itchyny <itchyny@hatena.ne.jp>
Date: Wed, 8 Jan 2020 00:20:42 +0900
Subject: [PATCH] check destination error on cleaned path

---
 mmv.go      |  4 ++++
 mmv_test.go | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/mmv.go b/mmv.go
index eaa2b31..ca101b4 100644
--- a/mmv.go
+++ b/mmv.go
@@ -47,6 +47,10 @@ func buildRenames(files map[string]string) ([]rename, error) {
 		if src == "" || dst == "" {
 			return nil, &emptyPathError{}
 		}
+		if d := filepath.Clean(dst); d != dst {
+			dst = d
+			files[src] = dst
+		}
 		if _, ok := revs[dst]; ok {
 			return nil, &sameDestinationError{dst}
 		}
diff --git a/mmv_test.go b/mmv_test.go
index 05e7724..a799ce6 100644
--- a/mmv_test.go
+++ b/mmv_test.go
@@ -170,6 +170,18 @@ func TestMove(t *testing.T) {
 			},
 			err: &sameDestinationError{"baz"},
 		},
+		{
+			name: "cleaned path same destination error",
+			files: map[string]string{
+				"foo": "baz",
+				"bar": "foo/../baz",
+			},
+			contents: map[string]string{
+				"foo": "0",
+				"bar": "1",
+			},
+			err: &sameDestinationError{"baz"},
+		},
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {