def run_command()

in app/versioneer.py [0:0]

• 35 lines of code
• 10 McCabe index (conditional complexity)

def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
                env=None):
    """Call the given command(s)."""
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, env=env,
                                 stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %%s" %% dispcmd)
                print(e)
            return None, None
    else:
        if verbose:
            print("unable to find command, tried %%s" %% (commands,))
        return None, None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %%s (error)" %% dispcmd)
            print("stdout was %%s" %% stdout)
        return None, p.returncode
    return stdout, p.returncode