def METHOD_NAME(module, brew_path, tap):
    '''Returns True if already tapped.'''
    rc, out, err = module.run_command([
        brew_path,
        'tap',
    ])
    taps = [tap_.strip().lower() for tap_ in out.split('\n') if tap_]
    tap_name = re.sub('homebrew-', '', tap.lower())
    return tap_name in taps