Function parse_and_apply_changes

codes/4_debugging.py:11–80

Apply SEARCH / REPLACE edits produced by the LLM to files in debug_dir.

(responses, debug_dir, save_num=1)

def parse_and_apply_changes(responses, debug_dir, save_num=1):
    """Apply SEARCH / REPLACE edits produced by the LLM to files in debug_dir."""
    for response in responses:
        # Split into blocks per file
        file_blocks = re.split(r"Filename:\s*([^\n]+)", response)
        # Example: ['', 'file1.py', '...file1 content...', 'file2.py', '...file2 content...', ...]

        if len(file_blocks) < 3:
            print(f"❌ No filename patterns found in response:\n{response[:200]}...\n")
            continue

        # Process blocks per file (odd indices: filename, even indices: diff content)
        for i in range(1, len(file_blocks), 2):
            filename = file_blocks[i].strip()
            file_content_block = file_blocks[i + 1]

            filepath = os.path.join(debug_dir, filename)

            # SEARCH/REPLACE pattern
            search_replace_pattern = (
                r"<<<<<<< SEARCH\n(.*?)\n=======\n(.*?)\n>>>>>>> REPLACE"
            )
            matches = re.findall(search_replace_pattern, file_content_block, re.DOTALL)

            if not matches:
                print(f"❌ No SEARCH/REPLACE patterns found for file: {filename}\n")
                continue

            # Check file existence
            if not os.path.exists(filepath):
                print(f"❌ File does not exist: {filepath}\n")
                continue

            # Read file
            try:
                with open(filepath, "r", encoding="utf-8") as f:
                    file_content = f.read()
            except Exception as e:
                print(f"❌ Error reading file {filepath}: {e}\n")
                continue

            modified = False

            # Apply SEARCH/REPLACE
            for idx, (search_text, replace_text) in enumerate(matches, 1):
                search_text = search_text.strip()
                replace_text = replace_text.strip()

                if search_text in file_content:
                    file_content = file_content.replace(search_text, replace_text)
                    modified = True
                    print(f"✅ {filename}: Modification {idx} applied")
                else:
                    print(
                        f"❌ {filename}: Search text for modification {idx} not found:\n"
                        f"{search_text[:200]}...\n"
                    )