Mini Shell

# -*- test-case-name: twisted.test.test_twistd -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.


import os
import sys

from twisted import copyright
from twisted.application import app, internet, service
from twisted.python import log


class ServerOptions(app.ServerOptions):
    synopsis = "Usage: twistd [options]"

    optFlags = [
        ["nodaemon", "n", "(for backwards compatibility)."],
    ]

    def opt_version(self):
        """
        Print version information and exit.
        """
        print(
            f"twistd (the Twisted Windows runner) {copyright.version}",
            file=self.stdout,
        )
        print(copyright.copyright, file=self.stdout)
        sys.exit()


class WindowsApplicationRunner(app.ApplicationRunner):
    """
    An ApplicationRunner which avoids unix-specific things. No
    forking, no PID files, no privileges.
    """

    def preApplication(self):
        """
        Do pre-application-creation setup.
        """
        self.oldstdout = sys.stdout
        self.oldstderr = sys.stderr
        os.chdir(self.config["rundir"])

    def postApplication(self):
        """
        Start the application and run the reactor.
        """
        service.IService(self.application).privilegedStartService()
        app.startApplication(self.application, not self.config["no_save"])
        app.startApplication(internet.TimerService(0.1, lambda: None), 0)
        self.startReactor(None, self.oldstdout, self.oldstderr)
        log.msg("Server Shut Down.")