cmdwrap.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import subprocess


def run_cmd(*args):
    process = subprocess.Popen(
        args,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )
    out = process.communicate()

    if process.returncode != 0:
        raise Exception(
            args, process.returncode, out
        )
    else:
        return out


class CmdWrap(object):

    def __init__(self, name, *args):
        self.name = name
        self.default_args = args

    def __getattr__(self, name):
        if name in self.__dict__:
            return self.__dict__['name']
        else:
            return lambda *args: run_cmd(
                self.name, name, *args
            )

    def __call__(self, *args):
        return run_cmd(self.name, *args)