1 files changed, 66 insertions, 0 deletions
diff --git a/scripts/update_build_helper.py b/scripts/update_build_helper.py
new file mode 100644
index 0000000..c9436a1
--- /dev/null
+++ b/scripts/update_build_helper.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+
+import argparse
+import importlib.util
+import os
+from pathlib import Path
+import py_compile
+import shutil
+import tempfile
+
+
+DESTINATION = (
+    Path(__file__).resolve().parents[1]
+    / "src"
+    / "sailfish_devel_mcp"
+    / "vendor"
+    / "build_sailfishos.py"
+)
+
+
+def helper_version(path: Path) -> str:
+    spec = importlib.util.spec_from_file_location("candidate_build_sailfishos", path)
+    if spec is None or spec.loader is None:
+        raise RuntimeError(f"could not load helper: {path}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    version = getattr(module, "HELPER_VERSION", None)
+    if not isinstance(version, str) or not version:
+        raise RuntimeError(f"helper has no HELPER_VERSION: {path}")
+    return version
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="Update the vendored build-sailfishos helper")
+    parser.add_argument("source", type=Path, help="Canonical build_sailfishos.py")
+    args = parser.parse_args()
+
+    source = args.source.expanduser().resolve()
+    if not source.is_file():
+        parser.error(f"source helper not found: {source}")
+    version = helper_version(source)
+    py_compile.compile(str(source), doraise=True)
+
+    DESTINATION.parent.mkdir(parents=True, exist_ok=True)
+    descriptor, temporary_name = tempfile.mkstemp(
+        prefix=f".{DESTINATION.name}.",
+        suffix=".tmp",
+        dir=DESTINATION.parent,
+    )
+    os.close(descriptor)
+    temporary = Path(temporary_name)
+    try:
+        shutil.copyfile(source, temporary)
+        temporary.chmod(0o755 if source.stat().st_mode & 0o111 else 0o644)
+        os.replace(temporary, DESTINATION)
+    finally:
+        try:
+            temporary.unlink()
+        except FileNotFoundError:
+            pass
+    print(f"vendored build helper {version}: {DESTINATION}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())