mirror of
https://github.com/google/nomulus
synced 2026-08-17 12:46:11 +00:00
Ben McIlwainandGitHub
ad992beff9
This adds a Gemini CLI skill that leverages OpenRewrite to perform Abstract Syntax Tree (AST) based refactoring on Java codebases. It is highly preferred over text-based regex or python scripts because it understands Java semantics, correctly updates imports, and preserves formatting. A custom Python script is also included as a fallback for renaming fields and local variables.
65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
#!/usr/bin/env python3
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# Copyright 2026 The Nomulus Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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import re
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import os
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def usage():
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print("Usage: python safe_rename.py <filepath> <old_name> <new_name>")
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print("Safely renames an identifier in a Java file, ignoring strings and comments.")
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sys.exit(1)
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def main():
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if len(sys.argv) < 4:
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usage()
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filepath = sys.argv[1]
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old_name = sys.argv[2]
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new_name = sys.argv[3]
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if not os.path.exists(filepath):
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print(f"Error: File {filepath} not found.")
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sys.exit(1)
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with open(filepath, 'r', encoding='utf-8') as f:
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content = f.read()
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# Regex to tokenize Java source safely.
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token_pattern = re.compile(
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r'(?P<string>"(?:\\.|[^"\\])*")|'
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r'(?P<char>\'(?:\\.|[^\'\\])*\')|'
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r'(?P<line_comment>//.*)|'
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r'(?P<block_comment>/\*[\s\S]*?\*/)|'
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r'(?P<ident>[a-zA-Z_$][a-zA-Z0-9_$]*)'
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)
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def replacer(match):
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if match.group('ident') == old_name:
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return new_name
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return match.group(0)
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new_content = token_pattern.sub(replacer, content)
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if content == new_content:
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print(f"No occurrences of '{old_name}' found to rename in {filepath}.")
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else:
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with open(filepath, 'w', encoding='utf-8') as f:
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f.write(new_content)
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print(f"Successfully renamed '{old_name}' to '{new_name}' in {filepath}.")
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if __name__ == '__main__':
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main()
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