literal braces are text, not placeholders, for containment and walk exclusion

2 files changed, 4 insertions, 3 deletions

diff --git a/internal/engine/match.go b/internal/engine/match.go
index 0e8b3d5..9f5ff12 100644
--- a/internal/engine/match.go
+++ b/internal/engine/match.go
@@ -501,9 +501,8 @@ func (e *Engine) excludeDirs(d *Dir) []string {
 			if a.Kind != config.Copy && a.Kind != config.Move {
 				continue
 			}
-			prefix := a.Arg
-			if idx := strings.IndexByte(prefix, '{'); idx >= 0 {
-				prefix = prefix[:idx]
+			prefix, templated := plan.StaticPrefix(a.Arg)
+			if templated {
 				if idx2 := strings.LastIndexByte(prefix, '/'); idx2 >= 0 {
 					prefix = prefix[:idx2]
 				} else {
diff --git a/internal/engine/match_test.go b/internal/engine/match_test.go
index 477e06f..f2a01bc 100644
--- a/internal/engine/match_test.go
+++ b/internal/engine/match_test.go
@@ -267,6 +267,7 @@ func TestExcludeDirs(t *testing.T) {
 (rule "r7" (move "` + absDest + `"))
 (rule "r8" (copy "Backup"))
 (rule "r9" (rename "x-{name}"))
+(rule "r10" (move "Lit/{{a}}/{mtime:%Y}"))
 `
 	main := writeConfig(t, h, `(include "dl")`, map[string]string{"dl": conf})
 	e, errs := Load(main)
@@ -285,6 +286,7 @@ func TestExcludeDirs(t *testing.T) {
 		absDest,                       // r7: absolute, already inside root
 		filepath.Join(root, "Backup"), // r8: copy counts like move
 		// r9 rename "x-{name}": rename is never a destination.
+		filepath.Join(root, "Lit", "{a}"), // r10: "{{a}}" is literal text
 	}
 	if !reflect.DeepEqual(got, want) {
 		t.Fatalf("excludeDirs =\n%v\nwant\n%v", got, want)