style: Add pre-commit hook to fix JSON style in C++ code (#2266)

pre-commit-hooks/json_in_cpp.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+
+import argparse
+import re
+from pathlib import Path
+
+
+def fix_json_style(cpp_content: str) -> str:
+    cpp_content = cpp_content.replace('R"json(', 'R"JSON(').replace(')json"', ')JSON"')
+
+    pattern = r'R"JSON\((.*?)\)JSON"'
+
+    def replace_json(match):
+        raw_json = match.group(1)
+
+        raw_json = (
+            raw_json.replace(" :", ":")
+            .replace(" ,", ",")
+            .replace(" null", "null")
+            .replace(':"', ': "')
+            .replace(',"', ', "')
+            .replace('":{', '": {')
+            .replace('":[', '": [')
+            .replace('":true', '": true')
+            .replace('":false', '": false')
+            .replace('":null', '": null')
+        )
+        for digit in range(10):
+            raw_json = raw_json.replace(f'":{digit}', f'": {digit}')
+        return f'R"JSON({raw_json})JSON"'
+
+    return re.sub(pattern, replace_json, cpp_content, flags=re.DOTALL)
+
+
+def process_file(file_path: Path, dry_run: bool) -> bool:
+    content = file_path.read_text(encoding="utf-8")
+    new_content = fix_json_style(content)
+
+    if new_content != content:
+        print(f"Processing file: {file_path}")
+        if dry_run:
+            print("Dry run: changes won't be written to the file.")
+        else:
+            print("Writing changes to file.")
+            file_path.write_text(new_content, encoding="utf-8")
+    return new_content == content
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Fix JSON style in C++ files",
+    )
+    parser.add_argument(
+        "--dry-run",
+        default=False,
+        action="store_true",
+        help="Don't modify files, just print what would be changed",
+    )
+    parser.add_argument(
+        "files",
+        nargs="*",
+        help="Specific files to process",
+    )
+
+    args = parser.parse_args()
+
+    success = True
+    for file in args.files:
+        success = success and process_file(Path(file), dry_run=args.dry_run)
+    if not success:
+        print("Errors occurred while processing files.")
+        exit(1)
+
+
+if __name__ == "__main__":
+    main()