Compute chip-specific config files in a generic way

tools/build_project.py

@@ -15,7 +15,6 @@
 import logging
 import pathlib
 import argparse
-import itertools
 import contextlib
 import subprocess
 import multiprocessing
@@ -39,6 +38,14 @@
 """,
     flags=re.IGNORECASE | re.VERBOSE,
 )
+
+GRAPH_COMPONENT_REGEX = re.compile(r"^(\w+)|- (\w+)", flags=re.MULTILINE)
+CHIP_SPECIFIC_COMPONENTS = {
+    "sl_system": "sl_system",
+    "sl_memory": "sl_memory",
+    # There are only a few components whose filename doesn't match the component name
+    "freertos": "freertos_kernel",
+}
 LOGGER = logging.getLogger(__name__)
 
 yaml = YAML(typ="safe")
@@ -141,6 +148,43 @@ def git(*args: str) -> str:
     return commit_id
 
 
+def determine_chip_specific_config_filenames(
+    slcp_path: pathlib.Path, sdk: pathlib.Path, slc: str
+) -> list[str]:
+    """Determine the chip-specific config files to remove."""
+    proc = subprocess.run(
+        [slc, "graph", "-p", str(slcp_path.absolute()), "--sdk", str(sdk.absolute())],
+        cwd=str(slcp_path.parent),
+        check=True,
+        text=True,
+        capture_output=True,
+    )
+
+    all_components = {a or b for a, b in GRAPH_COMPONENT_REGEX.findall(proc.stdout)}
+
+    # Some configs don't seem to be present explicitly in the component graph
+    config_files = {"sl_memory_config.h"}
+
+    # List all of the SLCC files. There are neary 4,000.
+    slcc_paths = {slcc.stem.lower(): slcc for slcc in sdk.glob("**/*.slcc")}
+
+    for component_id in all_components:
+        if CHIP_SPECIFIC_REGEX.match(component_id):
+            pass
+        elif component_id in CHIP_SPECIFIC_COMPONENTS:
+            component_id = CHIP_SPECIFIC_COMPONENTS[component_id]
+        else:
+            continue
+
+        slcc = yaml.load(slcc_paths[component_id.lower()].read_text())
+
+        for config_file in slcc.get("config_file", []):
+            path = pathlib.PurePosixPath(config_file["path"]).name
+            config_files.add(path)
+
+    return config_files
+
+
 def main():
     parser = argparse.ArgumentParser(
         formatter_class=argparse.ArgumentDefaultsHelpFormatter
@@ -313,27 +357,6 @@ def main():
     # Delete the original project file
     (args.build_dir / base_project_slcp.name).unlink()
 
-    # Delete config files that must be regenerated by the SDK.
-    # XXX: This is fragile: you cannot force `slc` to always overwrite these files!
-    for filename in itertools.chain(
-        # RAIL config
-        (args.build_dir / "config").glob("sl_rail_*.h"),
-        [
-            # Z-Wave board and stack config
-            args.build_dir / "config/sl_memory_config.h",
-            args.build_dir / "config/sl_board_control_config.h",
-            args.build_dir / "config/FreeRTOSConfig.h",
-            # Hardware-specific startup config
-            args.build_dir / "config/sl_device_init_lfxo_config.h",
-            args.build_dir / "config/sl_device_init_hfxo_config.h",
-            args.build_dir / "config/sl_device_init_dcdc_config.h",
-        ],
-    ):
-        try:
-            filename.unlink()
-        except FileNotFoundError:
-            pass
-
     # Write the new project SLCP file
     with (args.build_dir / f"{base_project_name}.slcp").open("w") as f:
         yaml.dump(output_project, f)
@@ -373,6 +396,17 @@ def main():
         print(f"Project SDK version {base_project['sdk']['version']} not found")
         sys.exit(1)
 
+    print("Building component graph and identifying board-specific files")
+    for name in determine_chip_specific_config_filenames(
+        slcp_path=base_project_slcp, sdk=sdk, slc=slc
+    ):
+        try:
+            (args.build_dir / f"config/{name}").unlink()
+        except FileNotFoundError:
+            pass
+        else:
+            print(f"Deleted device-specific config: {name}")
+
     # Find the toolchain required by the project
     slps_path = (args.build_dir / base_project_name).with_suffix(".slps")
     slps_xml = ElementTree.parse(slps_path)