check_files.py

import os
import clang.cindex
# install deps sudo apt install libclang-dev
# pip install clang
# Set path to libclang.so if neededimport os
import os
import clang.cindex

clang.cindex.Config.set_library_file('/usr/lib/llvm-15/lib/libclang.so')  # adjust path if needed

def is_local_var(cursor, filename):
    return (
        cursor.kind == clang.cindex.CursorKind.VAR_DECL and
        cursor.semantic_parent.kind == clang.cindex.CursorKind.FUNCTION_DECL and
        cursor.location.file and os.path.samefile(cursor.location.file.name, filename)
    )

def collect_vars_to_rename(cursor, filename):
    to_rename = {}

    def visit(node):
        if is_local_var(node, filename):
            name = node.spelling
            if name.startswith('_'):
                to_rename[name] = []
        for child in node.get_children():
            visit(child)

    visit(cursor)
    return to_rename

def collect_usages(cursor, filename, var_names, result):
    if cursor.spelling in var_names and cursor.location.file and os.path.samefile(cursor.location.file.name, filename):
        result[cursor.spelling].append((cursor.location.line, cursor.location.column, len(cursor.spelling)))
    for child in cursor.get_children():
        collect_usages(child, filename, var_names, result)

def rename_in_file(filepath):
    index = clang.cindex.Index.create()
    tu = index.parse(filepath, args=['-std=c++17'])

    vars_to_rename = collect_vars_to_rename(tu.cursor, filepath)
    if not vars_to_rename:
        return

    collect_usages(tu.cursor, filepath, vars_to_rename.keys(), vars_to_rename)

    with open(filepath, 'r') as f:
        lines = f.readlines()

    # Flatten and sort all changes by file position (reverse order)
    all_changes = []
    for old_name, uses in vars_to_rename.items():
        new_name = old_name.lstrip('_')
        for (line, col, length) in uses:
            all_changes.append((line, col, length, new_name))

    for line, col, length, new_name in sorted(all_changes, reverse=True):
        l = lines[line - 1]
        lines[line - 1] = l[:col - 1] + new_name + l[col - 1 + length:]

    with open(filepath, 'w') as f:
        f.writelines(lines)

    print(f"Renamed in {filepath}:", [k for k in vars_to_rename.keys()])

def process_folder(folder_path):
    for root, _, files in os.walk(folder_path):
        for file in files:
            if file.endswith(('.cpp', '.c', '.hpp', '.h')):
                full_path = os.path.join(root, file)
                rename_in_file(full_path)

# Example usage
process_folder('./')  # Replace with your folder