Golang CommandLine.IsNoStandalone方法代码示例

// AutoFork? Standalone? ClientServer? Brew service?  This function deals with the
// various run configurations that we can run in.
func configureProcesses(g *libkb.GlobalContext, cl *libcmdline.CommandLine, cmd *libcmdline.Command) (err error) {

	g.Log.Debug("+ configureProcesses")
	defer func() {
		g.Log.Debug("- configureProcesses -> %v", err)
	}()

	// On Linux, the service configures its own autostart file. Otherwise, no
	// need to configure if we're a service.
	if cl.IsService() {
		g.Log.Debug("| in configureProcesses, is service")
		if runtime.GOOS == "linux" {
			g.Log.Debug("| calling AutoInstall")
			_, err := install.AutoInstall(g, "", false)
			if err != nil {
				return err
			}
		}
		return nil
	}

	// Start the server on the other end, possibly.
	// There are two cases in which we do this: (1) we want
	// a local loopback server in standalone mode; (2) we
	// need to "autofork" it. Do at most one of these
	// operations.
	if g.Env.GetStandalone() {
		if cl.IsNoStandalone() {
			err = fmt.Errorf("Can't run command in standalone mode")
			return err
		}
		err := service.NewService(g, false /* isDaemon */).StartLoopbackServer()
		if err != nil {
			if pflerr, ok := err.(libkb.PIDFileLockError); ok {
				err = fmt.Errorf("Can't run in standalone mode with a service running (see %q)",
					pflerr.Filename)
				return err
			}
		}
		return err
	}

	// After this point, we need to provide a remote logging story if necessary

	// If this command specifically asks not to be forked, then we are done in this
	// function. This sort of thing is true for the `ctl` commands and also the `version`
	// command.
	fc := cl.GetForkCmd()
	if fc == libcmdline.NoFork {
		return configureLogging(g, cl)
	}

	// If this command warrants an autofork, do it now.
	var newProc bool
	if fc == libcmdline.ForceFork || g.Env.GetAutoFork() {
		newProc, err = client.AutoForkServer(g, cl)
		if err != nil {
			return err
		}
	} else if libkb.IsBrewBuild {
		// If we're running in Brew mode, we might need to install ourselves as a persistent
		// service for future invocations of the command.
		newProc, err = install.AutoInstall(g, "", false)
		if err != nil {
			return err
		}
	}

	g.Log.Debug("| After forks; newProc=%v", newProc)
	if err = configureLogging(g, cl); err != nil {
		return err
	}

	// If we have created a new proc, then there's no need to keep going to the
	// final step, which is to check for a version clashes.
	if newProc {
		return nil
	}

	// Finally, we'll restart the service if we see that it's out of date.
	if err = client.FixVersionClash(g, cl); err != nil {
		return err
	}

	return nil
}

// AutoFork? Standalone? ClientServer? Brew service?  This function deals with the
// various run configurations that we can run in.
func configureProcesses(g *libkb.GlobalContext, cl *libcmdline.CommandLine, cmd *libcmdline.Command) (err error) {

	g.Log.Debug("+ configureProcesses")
	defer func() {
		g.Log.Debug("- configureProcesses -> %v", err)
	}()

	// On Linux, the service configures its own autostart file. Otherwise, no
	// need to configure if we're a service.
	if cl.IsService() {
		g.Log.Debug("| in configureProcesses, is service")
		if runtime.GOOS == "linux" {
			g.Log.Debug("| calling AutoInstall")
			_, err := install.AutoInstall(g, "", false, g.Log)
			if err != nil {
				return err
			}
		}
		return nil
	}

	// Start the server on the other end, possibly.
	// There are two cases in which we do this: (1) we want
	// a local loopback server in standalone mode; (2) we
	// need to "autofork" it. Do at most one of these
	// operations.
	if g.Env.GetStandalone() {
		if cl.IsNoStandalone() {
			err = fmt.Errorf("Can't run command in standalone mode")
			return err
		}
		err := service.NewService(g, false /* isDaemon */).StartLoopbackServer()
		if err != nil {
			if pflerr, ok := err.(libkb.PIDFileLockError); ok {
				err = fmt.Errorf("Can't run in standalone mode with a service running (see %q)",
					pflerr.Filename)
				return err
			}
		}
		return err
	}

	// After this point, we need to provide a remote logging story if necessary

	// If this command specifically asks not to be forked, then we are done in this
	// function. This sort of thing is true for the `ctl` commands and also the `version`
	// command.
	fc := cl.GetForkCmd()
	if fc == libcmdline.NoFork {
		return configureLogging(g, cl)
	}

	var newProc bool
	if libkb.IsBrewBuild {
		// If we're running in Brew mode, we might need to install ourselves as a persistent
		// service for future invocations of the command.
		newProc, err = install.AutoInstall(g, "", false, g.Log)
		if err != nil {
			return err
		}
	} else {
		// If this command warrants an autofork, do it now.
		if fc == libcmdline.ForceFork || g.Env.GetAutoFork() {
			newProc, err = client.AutoForkServer(g, cl)
			if err != nil {
				return err
			}
		}
	}

	// Restart the service if we see that it's out of date. It's important to do this
	// before we make any RPCs to the service --- for instance, before the logging
	// calls below. See the v1.0.8 update fiasco for more details. Also, only need
	// to do this if we didn't just start a new process.
	if !newProc {
		if err = client.FixVersionClash(g, cl); err != nil {
			return err
		}
	}

	g.Log.Debug("| After forks; newProc=%v", newProc)
	if err = configureLogging(g, cl); err != nil {
		return err
	}

	// This sends the client's PATH to the service so the service can update
	// its PATH if necessary. This is called after FixVersionClash(), which
	// happens above in configureProcesses().
	if err = configurePath(g, cl); err != nil {
		// Further note -- don't die here.  It could be we're calling this method
		// against an earlier version of the service that doesn't support it.
		// It's not critical that it succeed, so continue on.
		g.Log.Debug("Configure path failed: %v", err)
	}

	return nil
}