simpler ID generation to remove denormalization

llama_stack/core/id_generation.py

@@ -0,0 +1,44 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+from __future__ import annotations
+
+from collections.abc import Callable
+
+IdFactory = Callable[[], str]
+IdOverride = Callable[[str, IdFactory], str]
+
+_id_override: IdOverride | None = None
+
+
+def generate_object_id(kind: str, factory: IdFactory) -> str:
+    """Generate an identifier for the given kind using the provided factory.
+
+    Allows tests to override ID generation deterministically by installing an
+    override callback via :func:`set_id_override`.
+    """
+
+    override = _id_override
+    if override is not None:
+        return override(kind, factory)
+    return factory()
+
+
+def set_id_override(override: IdOverride) -> IdOverride | None:
+    """Install an override used to generate deterministic identifiers."""
+
+    global _id_override
+
+    previous = _id_override
+    _id_override = override
+    return previous
+
+
+def reset_id_override(token: IdOverride | None) -> None:
+    """Restore the previous override returned by :func:`set_id_override`."""
+
+    global _id_override
+    _id_override = token