def run()

in remove-apache-license-identifier.py [0:0]

• 19 lines of code
• 4 McCabe index (conditional complexity)

def run(cmd, cwd=None, encoding=None):
    """Run a command in a subshell and return the standard output.

    Run the command cmd in the directory cwd and use encoding to
    decode the standard output.
    """

    kwds = {
        'cwd': cwd,
        'stdout': subprocess.PIPE,
        'stderr': subprocess.PIPE,
        'text': True,
    }
    if sys.version_info >= (3, 6): # encoding introduced in Python 3.6
        kwds['encoding'] = encoding

    logging.debug('Running "%s" in %s', ' '.join(cmd), cwd)

    result = subprocess.run(cmd, **kwds, check=False)
    if result.returncode:
        logging.debug('Failed command: %s', ' '.join(cmd))
        logging.debug('Failed return code: %s', result.returncode)
        logging.debug('Failed stdout: %s', result.stdout.strip())
        logging.debug('Failed stderr: %s', result.stderr.strip())
        return []

    # Remove line continuations before splitting stdout into lines
    # Running command with text=True converts line endings to \n in stdout
    lines = result.stdout.replace('\\\n', ' ').splitlines()
    return [strip_whitespace(line) for line in lines]