new ihm

gcc/gen_compile_commands.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""Generate compile_commands.json (repo root) from a dry run of the makefiles.
+
+Used by VS Code IntelliSense (C/C++ extension) and clangd.
+Usage: python3 gcc/gen_compile_commands.py
+"""
+import json
+import os
+import re
+import shlex
+import subprocess
+
+ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
+MAKEFILES = ["gcc/makefile_boot", "gcc/makefile_appli"]
+COMPILERS = ("arm-none-eabi-gcc", "arm-none-eabi-g++")
+
+
+def dry_run(makefile):
+    # -B forces every compile command to be printed, -n executes nothing
+    out = subprocess.run(
+        ["make", "-r", "-B", "-n", "-f", makefile, "build_executable"],
+        cwd=ROOT, capture_output=True, text=True,
+    ).stdout
+    return re.sub(r"\\\n\s*", " ", out).splitlines()
+
+
+def main():
+    entries = []
+    seen = set()
+    for makefile in MAKEFILES:
+        for line in dry_run(makefile):
+            line = line.strip()
+            if not line.startswith(COMPILERS) or " -c " not in f" {line} ":
+                continue
+            args = shlex.split(line)
+            source = next((a for a in args if a.endswith((".c", ".cpp", ".s"))), None)
+            if not source or source in seen:
+                continue
+            seen.add(source)
+            entries.append({
+                "directory": ROOT,
+                "arguments": args,
+                "file": os.path.join(ROOT, source),
+            })
+    path = os.path.join(ROOT, "compile_commands.json")
+    with open(path, "w") as f:
+        json.dump(entries, f, indent=1)
+    print(f"{len(entries)} entries written to {path}")
+
+
+if __name__ == "__main__":
+    main()