Golang Context.Args方法代码示例

func journalAction(c *cli.Context) {
	if len(c.Args()) != 1 {
		fmt.Println("One unit file must be provided.")
		syscall.Exit(1)
	}
	jobName := c.Args()[0]

	js := registryCtl.GetJobState(jobName)

	if js == nil {
		fmt.Printf("%s does not appear to be running\n", jobName)
		syscall.Exit(1)
	}

	cmd := fmt.Sprintf("journalctl -u %s --no-pager -l -n %d", jobName, c.Int("lines"))
	if c.Bool("follow") {
		cmd += " -f"
	}

	// check if the job is running on this machine
	var channel *ssh.Channel
	var err error
	if machine.IsLocalMachineState(js.MachineState) {
		channel = runLocalCommand(cmd)
	} else {
		channel, err = runRemoteCommand(cmd, js.MachineState.PublicIP)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %v", err)
		}
	}

	readSSHChannel(channel)
}

func verifyUnitAction(c *cli.Context) {
	r := getRegistry()

	if len(c.Args()) != 1 {
		fmt.Println("One unit file must be provided.")
		syscall.Exit(1)
	}

	name := path.Base(c.Args()[0])
	payload := r.GetPayload(name)

	if payload == nil {
		fmt.Println("Job not found.")
		syscall.Exit(1)
	}

	sv, err := sign.NewSignatureVerifierFromSSHAgent()
	if err != nil {
		fmt.Println("Fail to create SignatureVerifier:", err)
		return
	}

	s := r.GetSignatureSetOfPayload(name)
	ok, err := sv.VerifyPayload(payload, s)
	if !ok || err != nil {
		fmt.Printf("Check of payload %s failed: %v\n", payload.Name, err)
		return
	}

	fmt.Printf("Succeed to verify job(%s).\n", payload.Name)
}

func sshAction(c *cli.Context) {
	unit := c.String("unit")
	machine := c.String("machine")

	if unit != "" && machine != "" {
		log.Fatal("Both flags, machine and unit provided, please specify only one")
	}

	args := c.Args()
	var err error
	var addr string

	switch {
	case machine != "":
		addr, _ = findAddressInMachineList(machine)
	case unit != "":
		addr, _ = findAddressInRunningUnits(unit)
	default:
		addr, err = globalMachineLookup(args)
		args = args[1:]
	}

	if err != nil {
		log.Fatal(err)
	}

	if addr == "" {
		log.Fatalf("Requested machine could not be found")
	}

	agentForwarding := c.Bool("agent")

	var sshClient *ssh.SSHForwardingClient
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr, getChecker(), agentForwarding)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr, getChecker(), agentForwarding)
	}
	if err != nil {
		log.Fatal(err.Error())
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		channel, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		readSSHChannel(channel)
	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}

func stopUnitAction(c *cli.Context) {
	r := getRegistry()

	for _, v := range c.Args() {
		name := path.Base(v)
		r.StopJob(name)
	}
}

func destroyUnitsAction(c *cli.Context) {
	for _, v := range c.Args() {
		name := path.Base(v)
		registryCtl.StopJob(name)
		registryCtl.DestroyPayload(name)
		registryCtl.DestroySignatureSetOfPayload(name)
	}
}

func destroyUnitsAction(c *cli.Context) {
	r := getRegistry()

	for _, v := range c.Args() {
		name := path.Base(v)
		r.StopJob(name)
		r.DestroyPayload(name)
	}
}

func statusUnitsAction(c *cli.Context) {
	for i, v := range c.Args() {
		// This extra newline here to match systemctl status output
		if i != 0 {
			fmt.Printf("\n")
		}

		name := path.Base(v)
		printUnitStatus(c, name)
	}
}

func journalAction(c *cli.Context) {
	if len(c.Args()) != 1 {
		fmt.Println("One unit file must be provided.")
		syscall.Exit(1)
	}
	jobName := c.Args()[0]

	js := registryCtl.GetJobState(jobName)

	if js == nil {
		fmt.Printf("%s does not appear to be running\n", jobName)
		syscall.Exit(1)
	}

	addr := fmt.Sprintf("%s:22", js.MachineState.PublicIP)

	var err error
	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatal(err.Error())
	}

	defer sshClient.Close()

	cmd := fmt.Sprintf("journalctl -u %s --no-pager -l -n %d", jobName, c.Int("lines"))
	if c.Bool("follow") {
		cmd += " -f"
	}
	stdout, err := ssh.Execute(sshClient, cmd)
	if err != nil {
		log.Fatalf("Unable to run command over SSH: %s", err.Error())
	}

	for true {
		bytes, prefix, err := stdout.ReadLine()
		if err != nil {
			break
		}

		fmt.Print(string(bytes))
		if !prefix {
			fmt.Print("\n")
		}
	}
}

func printUnitAction(c *cli.Context) {
	if len(c.Args()) != 1 {
		fmt.Println("One unit file must be provided.")
		syscall.Exit(1)
	}

	name := path.Base(c.Args()[0])
	payload := registryCtl.GetPayload(name)

	if payload == nil {
		fmt.Println("Job not found.")
		syscall.Exit(1)
	}

	fmt.Print(payload.Unit.String())
}

func submitUnitsAction(c *cli.Context) {
	toSign := c.Bool("sign")
	var sc *sign.SignatureCreator
	if toSign {
		var err error
		sc, err = sign.NewSignatureCreatorFromSSHAgent()
		if err != nil {
			fmt.Println("Fail to create SignatureVerifier:", err)
			return
		}
	}

	// First, validate each of the provided payloads
	payloads := make([]job.JobPayload, len(c.Args()))
	for i, v := range c.Args() {
		payload, err := getJobPayloadFromFile(v)
		if err != nil {
			fmt.Println(err.Error())
			return
		}
		payloads[i] = *payload
	}

	// Only after all the provided payloads have been validated
	// do we push any changes to the Registry
	for _, payload := range payloads {
		err := registryCtl.CreatePayload(&payload)
		if err != nil {
			fmt.Printf("Creation of payload %s failed: %v\n", payload.Name, err)
			return
		}
		if toSign {
			s, err := sc.SignPayload(&payload)
			if err != nil {
				fmt.Printf("Creation of sign for payload %s failed: %v\n", payload.Name, err)
				return
			}
			registryCtl.CreateSignatureSet(s)
		}
	}
}

func submitUnitsAction(c *cli.Context) {
	r := getRegistry(c)

	// First, validate each of the provided payloads
	payloads := make([]job.JobPayload, len(c.Args()))
	for i, v := range c.Args() {
		payload, err := getJobPayloadFromFile(v)
		if err != nil {
			fmt.Println(err.Error())
			return
		}
		payloads[i] = *payload
	}

	// Only after all the provided payloads have been validated
	// do we push any changes to the Registry
	for _, payload := range payloads {
		err := r.CreatePayload(&payload)
		if err != nil {
			fmt.Printf("Creation of payload %s failed: %v\n", payload.Name, err)
			return
		}
	}
}

func startUnitAction(c *cli.Context) {
	var err error
	r := getRegistry()

	payloads := make([]job.JobPayload, len(c.Args()))
	for i, v := range c.Args() {
		name := path.Base(v)
		payload := r.GetPayload(name)
		if payload == nil {
			payload, err = getJobPayloadFromFile(v)
			if err != nil {
				fmt.Println(err.Error())
				return
			}

			err = r.CreatePayload(payload)
			if err != nil {
				fmt.Printf("Creation of payload %s failed: %v\n", payload.Name, err)
				return
			}
		}

		payloads[i] = *payload
	}

	requirements := parseRequirements(c.String("require"))

	// TODO: This must be done in a transaction!
	for _, jp := range payloads {
		j := job.NewJob(jp.Name, requirements, &jp, nil)
		err := r.CreateJob(j)
		if err != nil {
			fmt.Printf("Creation of job %s failed: %v\n", j.Name, err)
		}
	}
}

func startUnitAction(c *cli.Context) {
	var err error

	// If signing is explicitly set to on, verification will be done also.
	toSign := c.Bool("sign")
	var sc *sign.SignatureCreator
	var sv *sign.SignatureVerifier
	if toSign {
		var err error
		sc, err = sign.NewSignatureCreatorFromSSHAgent()
		if err != nil {
			fmt.Println("Fail to create SignatureCreator:", err)
			return
		}
		sv, err = sign.NewSignatureVerifierFromSSHAgent()
		if err != nil {
			fmt.Println("Fail to create SignatureVerifier:", err)
			return
		}
	}

	payloads := make([]job.JobPayload, len(c.Args()))
	for i, v := range c.Args() {
		name := path.Base(v)
		payload := registryCtl.GetPayload(name)
		if payload == nil {
			payload, err = getJobPayloadFromFile(v)
			if err != nil {
				fmt.Println(err.Error())
				return
			}

			err = registryCtl.CreatePayload(payload)
			if err != nil {
				fmt.Printf("Creation of payload %s failed: %v\n", payload.Name, err)
				return
			}
			if toSign {
				s, err := sc.SignPayload(payload)
				if err != nil {
					fmt.Printf("Creation of sign for payload %s failed: %v\n", payload.Name, err)
					return
				}
				registryCtl.CreateSignatureSet(s)
			}
		}
		if toSign {
			s := registryCtl.GetSignatureSetOfPayload(name)
			ok, err := sv.VerifyPayload(payload, s)
			if !ok || err != nil {
				fmt.Printf("Check of payload %s failed: %v\n", payload.Name, err)
				return
			}
		}

		payloads[i] = *payload
	}

	requirements := parseRequirements(c.String("require"))

	// TODO: This must be done in a transaction!
	for _, jp := range payloads {
		j := job.NewJob(jp.Name, requirements, &jp, nil)
		err := registryCtl.CreateJob(j)
		if err != nil {
			fmt.Printf("Creation of job %s failed: %v\n", j.Name, err)
		}
	}
}

func sshAction(c *cli.Context) {
	unit := c.String("unit")
	machine := c.String("machine")

	if unit != "" && machine != "" {
		log.Fatal("Both flags, machine and unit provided, please specify only one")
	}

	args := c.Args()
	var err error
	var addr string

	switch {
	case machine != "":
		addr, _ = findAddressInMachineList(machine)
	case unit != "":
		addr, _ = findAddressInRunningUnits(unit)
	default:
		addr, err = globalMachineLookup(args)
		args = args[1:]
	}

	if err != nil {
		log.Fatal(err)
	}

	if addr == "" {
		log.Fatalf("Requested machine could not be found")
	}

	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatal(err.Error())
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		stdout, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		for {
			bytes, prefix, err := stdout.ReadLine()
			if err != nil {
				break
			}

			fmt.Print(string(bytes))
			if !prefix {
				fmt.Print("\n")
			}
		}

	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}

func sshAction(c *cli.Context) {
	r := getRegistry(c)

	args := c.Args()
	unit := c.String("unit")
	if len(args) == 0 && unit == "" {
		log.Fatalf("Provide one machine or unit")
	}

	var addr string
	if unit == "" {
		lookup := args[0]
		args = args[1:]
		states := r.GetActiveMachines()
		var match *machine.MachineState
		for i, _ := range states {
			machState := states[i]
			if !strings.HasPrefix(machState.BootId, lookup) {
				continue
			} else if match != nil {
				log.Fatalf("Found more than one Machine, be more specfic")
			}
			match = &machState
		}

		if match == nil {
			log.Fatalf("Could not find provided Machine")
		}

		addr = fmt.Sprintf("%s:22", match.PublicIP)
	} else {
		js := r.GetJobState(unit)
		if js == nil {
			log.Fatalf("Requested unit %s does not appear to be running", unit)
		}
		addr = fmt.Sprintf("%s:22", js.MachineState.PublicIP)
	}

	var err error
	var sshClient *gossh.ClientConn
	if tun := getTunnelFlag(c); tun != "" {
		sshClient, err = ssh.NewTunnelledSSHClient("core", tun, addr)
	} else {
		sshClient, err = ssh.NewSSHClient("core", addr)
	}
	if err != nil {
		log.Fatalf("Unable to establish SSH connection: %v", err)
		return
	}

	defer sshClient.Close()

	if len(args) > 0 {
		cmd := strings.Join(args, " ")
		stdout, err := ssh.Execute(sshClient, cmd)
		if err != nil {
			log.Fatalf("Unable to run command over SSH: %s", err.Error())
		}

		for {
			bytes, prefix, err := stdout.ReadLine()
			if err != nil {
				break
			}

			print(string(bytes))
			if !prefix {
				print("\n")
			}
		}

	} else {
		if err := ssh.Shell(sshClient); err != nil {
			log.Fatalf(err.Error())
		}
	}
}