tools.py 文件源码

def _boot(self):
        # Child processes don't start without a HOME dir
        if not self.env.get('HOME', False):
            raise HerokuStartupError('"HOME" environment not set... aborting.')

        port = self.config.get('base_port')
        web_dynos = self.config.get('num_dynos_web', 1)
        worker_dynos = self.config.get('num_dynos_worker', 1)
        commands = [
            self.shell_command, 'local', '-p', str(port),
            "web={},worker={}".format(web_dynos, worker_dynos)
        ]
        try:
            self._process = subprocess.Popen(
                commands,
                stdout=subprocess.PIPE,
                stderr=subprocess.STDOUT,
                env=self.env,
                preexec_fn=os.setsid,
            )
        except OSError:
            self.out.error("Couldn't start Heroku for local debugging.")
            raise