Replace Apache license headers with SPDX ID

scripts/update_license_headers.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import re
+import sys
+
+def update_license_header(file_path):
+    with open(file_path, 'r') as file:
+        content = file.read()
+
+    apache_header_pattern = re.compile(
+        r'(/\*|#|//)\s*Licensed under the Apache License, Version 2\.0.*?'
+        r'limitations under the License\.',
+        re.DOTALL
+    )
+    spdx_header = "// SPDX-License-Identifier: Apache-2.0\n"
+
+    if content.startswith(spdx_header):
+        print(f"Skipping {file_path}: SPDX header already present")
+        return False
+
+    new_content, count = apache_header_pattern.subn(spdx_header, content, count=1)
+
+    if count > 0:
+        with open(file_path, 'w') as file:
+            file.write(new_content)
+        print(f"Updated {file_path}")
+        return True
+    else:
+        print(f"Skipping {file_path}: No Apache header found")
+        return False
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: python update_license_headers.py <file> [<file> ...]")
+        sys.exit(1)
+
+    total_updated = sum(update_license_header(file) for file in sys.argv[1:])
+    print(f"Total files updated: {total_updated}")
+
+if __name__ == "__main__":
+    main()