MLIA-769 Expand use of target/backend registries

- Use the target/backend registries to avoid hard-coded names.
- Cache target profiles to avoid re-loading them

Change-Id: I474b7c9ef23894e1d8a3ea06d13a37652054c62e

2 files changed, 26 insertions, 17 deletions

diff --git a/src/mlia/backend/corstone/__init__.py b/src/mlia/backend/corstone/__init__.py
index 36f74ee..b59ab65 100644
--- a/src/mlia/backend/corstone/__init__.py
+++ b/src/mlia/backend/corstone/__init__.py
@@ -7,24 +7,20 @@ from mlia.backend.config import System
 from mlia.backend.registry import registry
 from mlia.core.common import AdviceCategory
 
-registry.register(
-    "Corstone-300",
-    BackendConfiguration(
-        supported_advice=[AdviceCategory.PERFORMANCE, AdviceCategory.OPTIMIZATION],
-        supported_systems=[System.LINUX_AMD64],
-        backend_type=BackendType.CUSTOM,
-    ),
-)
-registry.register(
-    "Corstone-310",
-    BackendConfiguration(
-        supported_advice=[AdviceCategory.PERFORMANCE, AdviceCategory.OPTIMIZATION],
-        supported_systems=[System.LINUX_AMD64],
-        backend_type=BackendType.CUSTOM,
-    ),
-)
+# List of mutually exclusive Corstone backends ordered by priority
+CORSTONE_PRIORITY = ("Corstone-310", "Corstone-300")
+
+for corstone_name in CORSTONE_PRIORITY:
+    registry.register(
+        corstone_name,
+        BackendConfiguration(
+            supported_advice=[AdviceCategory.PERFORMANCE, AdviceCategory.OPTIMIZATION],
+            supported_systems=[System.LINUX_AMD64],
+            backend_type=BackendType.CUSTOM,
+        ),
+    )
 
 
 def is_corstone_backend(backend_name: str) -> bool:
     """Check if backend belongs to Corstone."""
-    return backend_name in ["Corstone-300", "Corstone-310"]
+    return backend_name in CORSTONE_PRIORITY
diff --git a/src/mlia/backend/manager.py b/src/mlia/backend/manager.py
index b0fa919..d953b2d 100644
--- a/src/mlia/backend/manager.py
+++ b/src/mlia/backend/manager.py
@@ -9,11 +9,13 @@ from abc import abstractmethod
 from pathlib import Path
 from typing import Callable
 
+from mlia.backend.config import BackendType
 from mlia.backend.corstone.install import get_corstone_installations
 from mlia.backend.install import DownloadAndInstall
 from mlia.backend.install import Installation
 from mlia.backend.install import InstallationType
 from mlia.backend.install import InstallFromPath
+from mlia.backend.registry import registry as backend_registry
 from mlia.backend.tosa_checker.install import get_tosa_backend_installation
 from mlia.core.errors import ConfigurationError
 from mlia.core.errors import InternalError
@@ -279,3 +281,14 @@ def get_installation_manager(noninteractive: bool = False) -> InstallationManage
     backends.append(get_tosa_backend_installation())
 
     return DefaultInstallationManager(backends, noninteractive=noninteractive)
+
+
+def get_available_backends() -> list[str]:
+    """Return list of the available backends."""
+    manager = get_installation_manager()
+    available_backends = [
+        backend
+        for backend, cfg in backend_registry.items.items()
+        if cfg.type == BackendType.BUILTIN or manager.backend_installed(backend)
+    ]
+    return available_backends