.cache used for credits

internal/pipeline/music.go

@@ -48,6 +48,7 @@ type preparedMusicAssets struct {
 	Generated     []assetResource
 	SkipSourceRel map[string]struct{}
 	Artifacts     []string
+	TempRoots     []string
 }
 
 type musicMetadata struct {
@@ -125,7 +126,8 @@ func prepareMusicAssets(p *project.Project) (*preparedMusicAssets, error) {
 	sort.Strings(dirs)
 
 	generatedByDir := make(map[string][]creditsEntry)
-	stageRoot := filepath.Join(p.BuildDir(), ".cache", "music")
+	stageRoot := filepath.Join(p.Root, ".cache", "music")
+	result.TempRoots = append(result.TempRoots, stageRoot)
 
 	ffmpegPath, err := resolveFFmpegBinary()
 	if err != nil {
@@ -227,7 +229,10 @@ func prepareMusicAssets(p *project.Project) (*preparedMusicAssets, error) {
 }
 
 func writeCreditsArtifacts(p *project.Project, generatedByDir map[string][]creditsEntry) ([]string, error) {
-	creditsRoot := filepath.Join(p.BuildDir(), "credits")
+	creditsRoot := filepath.Join(p.Root, ".cache", "credits")
+	if err := os.RemoveAll(creditsRoot); err != nil {
+		return nil, fmt.Errorf("reset credits dir: %w", err)
+	}
 	if err := os.MkdirAll(creditsRoot, 0o755); err != nil {
 		return nil, fmt.Errorf("create credits dir: %w", err)
 	}
@@ -310,6 +315,21 @@ func writeCreditsArtifacts(p *project.Project, generatedByDir map[string][]credi
 	return artifacts, nil
 }
 
+func cleanupPreparedMusicAssets(prepared *preparedMusicAssets) error {
+	if prepared == nil {
+		return nil
+	}
+	for _, root := range prepared.TempRoots {
+		if strings.TrimSpace(root) == "" {
+			continue
+		}
+		if err := os.RemoveAll(root); err != nil {
+			return fmt.Errorf("remove temporary music artifact root %s: %w", root, err)
+		}
+	}
+	return nil
+}
+
 func parseCreditsOverlay(path string) (creditsOverlay, error) {
 	entries, err := parseCreditsMarkdown(path)
 	if err != nil {