fix conflict subdirectory when untardir is the clashing directory

Signed-off-by: zwwhdls <zwwhdls@hotmail.com>

cmd/helm/fetch.go

@@ -166,13 +166,20 @@ func (f *fetchCmd) run() error {
 		if !filepath.IsAbs(ud) {
 			ud = filepath.Join(f.destdir, ud)
 		}
-		if _, err := os.Stat(ud); err != nil {
-			if err := os.MkdirAll(ud, 0755); err != nil {
+		// Let udCheck to check conflict file/dir without replacing ud when untarDir is the current directory(.).
+		udCheck := ud
+		if udCheck == "." {
+			_, udCheck = filepath.Split(f.chartRef)
+		} else {
+			_, chartName := filepath.Split(f.chartRef)
+			udCheck = filepath.Join(udCheck, chartName)
+		}
+		if _, err := os.Stat(udCheck); err != nil {
+			if err := os.MkdirAll(udCheck, 0755); err != nil {
 				return fmt.Errorf("Failed to untar (mkdir): %s", err)
 			}
-
 		} else {
-			return fmt.Errorf("failed to untar: a file or directory with the name %s already exists", ud)
+			return fmt.Errorf("Failed to untar: a file or directory with the name %s already exists", udCheck)
 		}
 
 		return chartutil.ExpandFile(ud, saved)

cmd/helm/fetch_test.go

@@ -188,7 +188,7 @@ func TestFetchCmd(t *testing.T) {
 		if err := cmd.RunE(cmd, []string{tt.chart}); err != nil {
 			if tt.fail {
 				if tt.wantErrorMsg != "" && strings.Contains(tt.wantErrorMsg, err.Error()) {
-					t.Fatalf("%q reported error not equel wantErr, reported: %s, wanted: %s", tt.name, err, tt.wantErrorMsg)
+					t.Fatalf("Actual error %s, not equal to expected error %s", err, tt.wantErrorMsg)
 				}
 				return
 			}