feat: run auto-build audio.cpp scripts for macos and windows

1 files changed, 13 insertions, 1 deletions

diff --git a/app/backends/audiocpp/catalog.py b/app/backends/audiocpp/catalog.py
index 412fdf1..5d49fac 100644
--- a/app/backends/audiocpp/catalog.py
+++ b/app/backends/audiocpp/catalog.py
@@ -2,6 +2,7 @@
 
 import json
 import re
+import sys
 from pathlib import Path
 from typing import Dict, List, Optional, Set, Tuple
 
@@ -73,9 +74,20 @@ def _backend_options(detected: Optional[str] = None
     options, that option gets ``[auto-detected]`` appended and is the
     default (cursor/start) selection; otherwise the first option is the
     default as before. Returns (options, default_index).
+
+    On macOS only ``cpu`` is offered: Metal (via ``build_metal.sh``) is
+    the only buildable inference backend there, and it is recorded as
+    ``cpu`` (see the ``-metal-`` -> ``cpu`` mapping in ``detect_backend``
+    and ``built_server_binary``), so cuda/vulkan/hip — which cannot build
+    on macOS — never reach the build step.
     """
+    if sys.platform == "darwin":
+        label = "cpu - Apple Metal (recorded as cpu)"
+        if detected == "cpu":
+            label += " [auto-detected]"
+        return [(label, "cpu")], 0
     width = max(len(name) for name, _ in _BACKEND_DESCRIPTIONS)
-    options: List[Tuple[str, str]] = []
+    options = []
     default_index = 0
     for index, (name, desc) in enumerate(_BACKEND_DESCRIPTIONS):
         label = f"{name.ljust(width)} - {desc}"