Golang cmd.CheckEmpty函數代碼示例

func (c *portCommand) Init(f *gnuflag.FlagSet, args []string) error {
	if err := f.Parse(true, args); err != nil {
		return err
	}
	args = f.Args()
	if args == nil {
		return errors.New("no port specified")
	}
	parts := strings.Split(args[0], "/")
	if len(parts) > 2 {
		return fmt.Errorf("expected %s; got %q", portFormat, args[0])
	}
	port, err := strconv.Atoi(parts[0])
	if err != nil {
		return badPort(parts[0])
	}
	if port < 1 || port > 65535 {
		return badPort(port)
	}
	protocol := "tcp"
	if len(parts) == 2 {
		protocol = strings.ToLower(parts[1])
		if protocol != "tcp" && protocol != "udp" {
			return fmt.Errorf(`protocol must be "tcp" or "udp"; got %q`, protocol)
		}
	}
	c.Port = port
	c.Protocol = protocol
	return cmd.CheckEmpty(args[1:])
}

func (c *PublishCommand) Init(args []string) error {
	if len(args) == 0 {
		return nil
	}
	c.URL = args[0]
	return cmd.CheckEmpty(args[1:])
}

func (v *VersionCommand) Init(f *gnuflag.FlagSet, args []string) error {
	v.out.AddFlags(f, "smart", cmd.DefaultFormatters)
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *ExposeCommand) Init(args []string) error {
	if len(args) == 0 {
		return errors.New("no service name specified")
	}
	c.ServiceName = args[0]
	return cmd.CheckEmpty(args[1:])
}

func (c *DestroyEnvironmentCommand) Init(f *gnuflag.FlagSet, args []string) error {
	addEnvironFlags(&c.EnvName, f)
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *UpgradeJujuCommand) Init(args []string) error {
	if c.vers != "" {
		vers, err := version.Parse(c.vers)
		if err != nil {
			return err
		}
		if vers.Major != version.Current.Major {
			return fmt.Errorf("cannot upgrade to version incompatible with CLI")
		}
		if c.UploadTools && vers.Build != 0 {
			// TODO(fwereade): when we start taking versions from actual built
			// code, we should disable --version when used with --upload-tools.
			// For now, it's the only way to experiment with version upgrade
			// behaviour live, so the only restriction is that Build cannot
			// be used (because its value needs to be chosen internally so as
			// not to collide with existing tools).
			return fmt.Errorf("cannot specify build number when uploading tools")
		}
		c.Version = vers
	}
	if len(c.Series) > 0 && !c.UploadTools {
		return fmt.Errorf("--series requires --upload-tools")
	}
	return cmd.CheckEmpty(args)
}

func (c *RemoteCommand) Init(f *gnuflag.FlagSet, args []string) error {
	f.StringVar(&c.msg, "error", "", "if set, fail")
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *RelationGetCommand) Init(f *gnuflag.FlagSet, args []string) error {
	// TODO FWER implement --format shell lp:1033511
	c.out.AddFlags(f, "smart", cmd.DefaultFormatters)
	f.Var(newRelationIdValue(c.ctx, &c.RelationId), "r", "specify a relation by id")
	if err := f.Parse(true, args); err != nil {
		return err
	}
	if c.RelationId == -1 {
		return fmt.Errorf("no relation id specified")
	}
	args = f.Args()
	c.Key = ""
	if len(args) > 0 {
		if c.Key = args[0]; c.Key == "-" {
			c.Key = ""
		}
		args = args[1:]
	}
	if name, found := c.ctx.RemoteUnitName(); found {
		c.UnitName = name
	}
	if len(args) > 0 {
		c.UnitName = args[0]
		args = args[1:]
	}
	if c.UnitName == "" {
		return fmt.Errorf("no unit id specified")
	}
	return cmd.CheckEmpty(args)
}

func (c *BootstrapCommand) Init(f *gnuflag.FlagSet, args []string) error {
	addEnvironFlags(&c.EnvName, f)
	f.BoolVar(&c.UploadTools, "upload-tools", false, "upload local version of tools before bootstrapping")
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *GetCommand) Init(args []string) error {
	// TODO(dfc) add --schema-only
	if len(args) == 0 {
		return errors.New("no service name specified")
	}
	c.ServiceName = args[0]
	return cmd.CheckEmpty(args[1:])
}

func (c *RpcCommand) Init(f *gnuflag.FlagSet, args []string) error {
	f.StringVar(&c.Value, "value", "", "doc")
	f.BoolVar(&c.Slow, "slow", false, "doc")
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *GetConstraintsCommand) Init(args []string) error {
	if len(args) > 0 {
		if !state.IsServiceName(args[0]) {
			return fmt.Errorf("invalid service name %q", args[0])
		}
		c.ServiceName, args = args[0], args[1:]
	}
	return cmd.CheckEmpty(args)
}

func (c *TestCommand) Init(f *gnuflag.FlagSet, args []string) error {
	if !c.Minimal {
		f.StringVar(&c.Option, "option", "", "option-doc")
	}
	if err := f.Parse(true, args); err != nil {
		return err
	}
	return cmd.CheckEmpty(f.Args())
}

func (c *DestroyServiceCommand) Init(args []string) error {
	if len(args) == 0 {
		return fmt.Errorf("no service specified")
	}
	if !state.IsServiceName(args[0]) {
		return fmt.Errorf("invalid service name %q", args[0])
	}
	c.ServiceName, args = args[0], args[1:]
	return cmd.CheckEmpty(args)
}

func (c *UnitGetCommand) Init(args []string) error {
	if args == nil {
		return errors.New("no setting specified")
	}
	if args[0] != "private-address" && args[0] != "public-address" {
		return fmt.Errorf("unknown setting %q", args[0])
	}
	c.Key = args[0]
	return cmd.CheckEmpty(args[1:])
}