feat: better preset listing

Author: slhck

src/ffmpeg_normalize/__main__.py

@@ -607,13 +607,17 @@ def error(message: object) -> NoReturn:
     # Handle --list-presets
     preset_manager = PresetManager()
     if cli_args.list_presets:
-        presets = preset_manager.get_available_presets()
-        if presets:
+        presets_with_source = preset_manager.get_presets_with_source()
+        if presets_with_source:
             print("Available presets:")
-            for preset in presets:
-                print(f"  - {preset}")
+            for preset_name, source in presets_with_source:
+                source_label = "(user)" if source == "user" else "(builtin)"
+                print(f"  - {preset_name} {source_label}")
         else:
-            print(f"No presets found in {preset_manager.presets_dir}")
+            print("No presets found.")
+        print()
+        print(f"User presets directory: {preset_manager.presets_dir}")
+        print("Place custom .json preset files in this directory.")
         sys.exit(0)
 
     # Load and apply preset if specified

src/ffmpeg_normalize/_presets.py

@@ -94,6 +94,37 @@ def get_available_presets(self) -> list[str]:
 
         return sorted(presets)
 
+    def get_presets_with_source(self) -> list[tuple[str, str]]:
+        """Get list of available presets with their source location.
+
+        Returns:
+            list[tuple[str, str]]: List of (preset_name, source) tuples where
+            source is either "user" or "builtin"
+        """
+        user_presets: set[str] = set()
+        builtin_presets: set[str] = set()
+
+        # Get presets from user config directory
+        if self.presets_dir.exists():
+            for file in self.presets_dir.glob("*.json"):
+                user_presets.add(file.stem)
+
+        # Get default presets from package
+        if self.default_presets_dir.exists():
+            for file in self.default_presets_dir.glob("*.json"):
+                builtin_presets.add(file.stem)
+
+        result = []
+        all_presets = sorted(user_presets | builtin_presets)
+        for preset in all_presets:
+            # User presets take precedence
+            if preset in user_presets:
+                result.append((preset, "user"))
+            else:
+                result.append((preset, "builtin"))
+
+        return result
+
     def load_preset(self, preset_name: str) -> dict[str, Any]:
         """Load a preset file by name.