def add_header_to_file()

in utils/license-headers.py [0:0]

• 12 lines of code
• 3 McCabe index (conditional complexity)

def add_header_to_file(filepath: str) -> None:
    with open(filepath) as f:
        lines = list(f)
    i = 0
    for i, line in enumerate(lines):
        if line not in lines_to_keep:
            break
    lines = lines[:i] + license_header_lines + lines[i:]
    with open(filepath, mode="w") as f:
        f.truncate()
        f.write("".join(lines))
    print(f"Fixed {os.path.relpath(filepath, os.getcwd())}")