func (v *CmdLaunchdStatus) ParseArgv(ctx *cli.Context) error {
	args := ctx.Args()
	if len(args) < 1 {
		return fmt.Errorf("No service name specified.")
	}

	// Resolve any label "aliases"
	labelStr := args[0]
	switch labelStr {
	case "service":
		labelStr = install.DefaultServiceLabel(v.G().Env.GetRunMode())
	case "kbfs":
		labelStr = install.DefaultKBFSLabel(v.G().Env.GetRunMode())
	case "updater":
		labelStr = install.DefaultUpdaterLabel(v.G().Env.GetRunMode())
	}

	label, err := install.NewServiceLabel(labelStr)
	if err != nil {
		return err
	}
	v.label = label

	v.format = ctx.String("format")
	return nil
}

// ParseArgv gets the secret phrase from the command args.
func (c *CmdDeviceAdd) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("Device add only takes one argument, the secret phrase.")
	}
	c.phrase = ctx.Args()[0]
	return nil
}

func (s *CmdSigsList) ParseTypes(ctx *cli.Context) error {
	tmp := ctx.String("type")
	if len(tmp) == 0 {
		return nil
	}

	types := map[string]bool{
		"track":          true,
		"proof":          true,
		"cryptocurrency": true,
		"self":           true,
	}

	ret := make(map[string]bool)
	v := strings.Split(tmp, ",")
	for _, i := range v {
		ok, found := types[i]
		if !ok || !found {
			return fmt.Errorf("Unknown signature type: %s", i)
		}
		ret[i] = true
	}
	s.types = ret
	return nil
}

func (v *CmdUntrack) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("Unfollow only takes one argument, the user to unfollow.")
	}
	v.user = ctx.Args()[0]
	return nil
}

func (c *CmdRevoke) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("Revoke takes exactly one key.")
	}
	c.id = ctx.Args()[0]
	return nil
}

func (s *CmdPGPList) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) > 0 {
		return UnexpectedArgsError("pgp list")
	}

	return nil
}

func (c *CmdStatus) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) > 0 {
		return UnexpectedArgsError("status")
	}
	c.json = ctx.Bool("json")
	return nil
}

func (v *CmdUpdateRun) ParseArgv(ctx *cli.Context) error {
	currentVersion := ctx.String("current-version")
	if currentVersion != "" {
		v.options.Version = currentVersion
	}

	destinationPath := ctx.String("destination-path")
	if destinationPath != "" {
		v.options.DestinationPath = destinationPath
	}

	source := ctx.String("source")
	if source != "" {
		v.options.Source = source
	}

	v.options.URL = ctx.String("url")
	v.options.Force = ctx.Bool("force")

	if v.options.DestinationPath == "" {
		return fmt.Errorf("No default destination path for this environment")
	}

	return nil
}

func (c *CmdFakeTrackingChanged) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("Must provide exactly one username.")
	}
	c.arg.Username = ctx.Args()[0]
	return nil
}

func (c *CmdPGPDrop) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("drop takes exactly one key")
	}
	c.id = ctx.Args()[0]
	return nil
}

func (c *CmdWatchdog) ParseArgv(ctx *cli.Context) error {
	c.restarts = ctx.Int("num-restarts")
	if c.restarts == 0 {
		c.restarts = numRestartsDefault
	}

	return nil
}

func (v *cmdUpdateNotify) ParseArgv(ctx *cli.Context) error {
	v.force = ctx.Bool("force")
	v.event = ctx.Args().First()
	if v.event == "" {
		return fmt.Errorf("No event specified")
	}
	return nil
}

func (v *CmdLaunchdAction) ParseArgv(ctx *cli.Context) error {
	args := ctx.Args()
	if len(args) < 1 {
		return fmt.Errorf("Need to specify launchd label")
	}
	v.label = args[0]
	return nil
}

func (c *CmdSearch) ParseArgv(ctx *cli.Context) error {
	c.query = strings.Join(ctx.Args(), " ")
	if c.query == "" {
		return fmt.Errorf("Search query must not be empty.")
	}
	c.json = ctx.Bool("json")
	return nil
}

func (v *CmdLogin) ParseArgv(ctx *cli.Context) (err error) {
	nargs := len(ctx.Args())
	if nargs > 1 {
		err = errors.New("Invalid arguments.")
	} else if nargs == 1 {
		v.Username = ctx.Args()[0]
	}
	return err
}

func (v *CmdTrack) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("Track only takes one argument, the user to follow.")
	}
	v.user = ctx.Args()[0]
	v.options = keybase1.TrackOptions{LocalOnly: ctx.Bool("local"), BypassConfirm: ctx.Bool("y")}
	v.skipProofCache = ctx.Bool("skip-proof-cache")
	return nil
}

func (v *CmdConfigGet) ParseArgv(ctx *cli.Context) error {
	if len(ctx.Args()) < 1 {
		return fmt.Errorf("Not enough arguments.")
	}
	v.key = ctx.Args()[0]
	if v.writer == nil {
		v.writer = GlobUI.OutputWriter()
	}
	return nil
}

func (v *CmdVersion) ParseArgv(c *cli.Context) error {
	switch c.String("format") {
	case "s":
		v.mode = modeShort
	case "v":
		v.mode = modeVerbose
	}
	v.svc = !c.Bool("S")
	return nil
}

func (c *CmdPGPDrop) ParseArgv(ctx *cli.Context) (err error) {
	if len(ctx.Args()) != 1 {
		return fmt.Errorf("drop takes exactly one key")
	}
	c.id, err = keybase1.KIDFromStringChecked(ctx.Args()[0])
	if err != nil {
		return fmt.Errorf("bad key: %v", err)
	}
	return nil
}

func (v *CmdDumpKeyfamily) ParseArgv(ctx *cli.Context) error {
	nargs := len(ctx.Args())
	if nargs > 1 {
		return fmt.Errorf("dump-keyfamily only takes one argument, the user to lookup")
	}
	if nargs == 1 {
		v.user = ctx.Args()[0]
	}
	return nil
}