added license

etc/add_license.py

@@ -0,0 +1,103 @@
+#!/usr/bin/env python3
+import argparse
+import fnmatch
+import os
+from pathlib import Path
+
+CPP_PATTERNS = ["*.h", "*.cpp"]
+PY_PATTERNS = ["*.py"]
+CMAKE_PATTERNS = ["CMakeLists.txt"]
+
+FILE_PATTERNS = CPP_PATTERNS + PY_PATTERNS + CMAKE_PATTERNS
+LICENSE_TEXT = "SPDX-License-Identifier: MPL-2.0"
+
+
+def get_comment_prefix(filename: str) -> str | None:
+    if any(fnmatch.fnmatch(filename, p) for p in CPP_PATTERNS):
+        return "// "
+    if any(fnmatch.fnmatch(filename, p) for p in (PY_PATTERNS + CMAKE_PATTERNS)):
+        return "# "
+    return None
+
+
+def matches_pattern(filename: str) -> bool:
+    return any(fnmatch.fnmatch(filename, p) for p in FILE_PATTERNS)
+
+
+def process_file(filepath: Path) -> bool:
+    filename = filepath.name
+    prefix = get_comment_prefix(filename)
+    if not prefix:
+        return False
+
+    license_line = f"{prefix}{LICENSE_TEXT}\n"
+
+    try:
+        with filepath.open("r", encoding="utf-8") as f:
+            lines = f.readlines()
+    except Exception as e:
+        print(f"⚠️ Error reading {filepath}: {e}")
+        return False
+
+    # Skip if SPDX already present anywhere in the file
+    if any("SPDX-License-Identifier" in line for line in lines):
+        return False
+
+    insert_index = 0
+
+    # For Python, keep shebang on the very first line
+    if filename.endswith(".py") and lines:
+        if lines[0].startswith("#!"):
+            insert_index = 1
+
+    lines.insert(insert_index, license_line)
+
+    try:
+        with filepath.open("w", encoding="utf-8") as f:
+            f.writelines(lines)
+    except Exception as e:
+        print(f"⚠️ Error writing {filepath}: {e}")
+        return False
+
+    return True
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Add SPDX-License-Identifier: MPL-2.0 to source files."
+    )
+    parser.add_argument(
+        "path",
+        help="Root directory to recursively process "
+             "(*.h, *.cpp, *.py, and CMakeLists.txt).",
+    )
+
+    args = parser.parse_args()
+
+    root_path = Path(args.path).expanduser().resolve()
+
+    if not root_path.exists():
+        print(f"Error: Path does not exist: {root_path}")
+        raise SystemExit(1)
+
+    if not root_path.is_dir():
+        print(f"Error: Path is not a directory: {root_path}")
+        raise SystemExit(1)
+
+    print(f"Processing directory: {root_path}")
+    modified = 0
+
+    for dirpath, _, files in os.walk(root_path):
+        dirpath = Path(dirpath)
+        for name in files:
+            if matches_pattern(name):
+                fullpath = dirpath / name
+                if process_file(fullpath):
+                    print(f"✔ Added SPDX: {fullpath}")
+                    modified += 1
+
+    print(f"\nDone. Updated {modified} file(s).")
+
+
+if __name__ == "__main__":
+    main()