cmdline.py 文件源码

def main(argv=None):
    """The main entry point to Coverage.

    This is installed as the script entry point.

    """
    if argv is None:
        argv = sys.argv[1:]
    try:
        status = CoverageScript().command_line(argv)
    except ExceptionDuringRun:
        # An exception was caught while running the product code.  The
        # sys.exc_info() return tuple is packed into an ExceptionDuringRun
        # exception.
        _, err, _ = sys.exc_info()
        traceback.print_exception(*err.args)
        status = ERR
    except CoverageException:
        # A controlled error inside coverage.py: print the message to the user.
        _, err, _ = sys.exc_info()
        print(err)
        status = ERR
    except SystemExit:
        # The user called `sys.exit()`.  Exit with their argument, if any.
        _, err, _ = sys.exc_info()
        if err.args:
            status = err.args[0]
        else:
            status = None
    return status