setup.py 文件源码

def run_cmd(args, swdir, updenv=None, ignerr=False, savestderr=None):
                if updenv:
                        # use temp environment modified with the given dict
                        env = os.environ.copy()
                        env.update(updenv)
                else:
                        # just use environment of this (parent) process as is
                        env = os.environ
                if ignerr:
                        # send stderr to devnull
                        stderr = open(os.devnull)
                elif savestderr:
                        stderr = savestderr
                else:
                        # just use stderr of this (parent) process
                        stderr = None
                ret = subprocess.Popen(args, cwd=swdir, env=env,
                    stderr=stderr).wait()
                if ret != 0:
                        if stderr:
                            stderr.close()
                        print("install failed and returned {0:d}.".format(ret),
                            file=sys.stderr)
                        print("Command was: {0}".format(" ".join(args)),
                            file=sys.stderr)

                        sys.exit(1)
                if stderr:
                        stderr.close()