Golang cli.NewApp函数代码示例

func ExampleAppBashComplete() {
	// set args for examples sake
	os.Args = []string{"greet", "--generate-bash-completion"}

	app := cli.NewApp()
	app.Name = "greet"
	app.EnableBashCompletion = true
	app.Commands = []cli.Command{
		{
			Name:        "describeit",
			ShortName:   "d",
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
			Action: func(c *cli.Context) {
				fmt.Printf("i like to describe things")
			},
		}, {
			Name:        "next",
			Usage:       "next example",
			Description: "more stuff to see when generating bash completion",
			Action: func(c *cli.Context) {
				fmt.Printf("the next example")
			},
		},
	}

	app.Run(os.Args)
	// Output:
	// describeit
	// d
	// next
	// help
	// h
}

func ExampleAppHelp() {
	// set args for examples sake
	os.Args = []string{"greet", "h", "describeit"}

	app := cli.NewApp()
	app.Name = "greet"
	app.Flags = []cli.Flag{
		cli.StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
	}
	app.Commands = []cli.Command{
		{
			Name:        "describeit",
			ShortName:   "d",
			Usage:       "use it to see a description",
			Description: "This is how we describe describeit the function",
			Action: func(c *cli.Context) {
				fmt.Printf("i like to describe things")
			},
		},
	}
	app.Run(os.Args)
	// Output:
	// NAME:
	//    describeit - use it to see a description
	//
	// USAGE:
	//    command describeit [arguments...]
	//
	// DESCRIPTION:
	//    This is how we describe describeit the function
}

func Example() {
	app := cli.NewApp()
	app.Name = "todo"
	app.Usage = "task list on the command line"
	app.Commands = []cli.Command{
		{
			Name:      "add",
			ShortName: "a",
			Usage:     "add a task to the list",
			Action: func(c *cli.Context) {
				println("added task: ", c.Args().First())
			},
		},
		{
			Name:      "complete",
			ShortName: "c",
			Usage:     "complete a task on the list",
			Action: func(c *cli.Context) {
				println("completed task: ", c.Args().First())
			},
		},
	}

	app.Run(os.Args)
}

func ExampleAppSubcommand() {
	// set args for examples sake
	os.Args = []string{"say", "hi", "english", "--name", "Jeremy"}
	app := cli.NewApp()
	app.Name = "say"
	app.Commands = []cli.Command{
		{
			Name:        "hello",
			ShortName:   "hi",
			Usage:       "use it to see a description",
			Description: "This is how we describe hello the function",
			Subcommands: []cli.Command{
				{
					Name:        "english",
					ShortName:   "en",
					Usage:       "sends a greeting in english",
					Description: "greets someone in english",
					Flags: []cli.Flag{
						cli.StringFlag{"name", "Bob", "Name of the person to greet"},
					},
					Action: func(c *cli.Context) {
						fmt.Println("Hello,", c.String("name"))
					},
				},
			},
		},
	}

	app.Run(os.Args)
	// Output:
	// Hello, Jeremy
}

func TestGlobalFlagsInSubcommands(t *testing.T) {
	subcommandRun := false
	app := cli.NewApp()

	app.Flags = []cli.Flag{
		cli.BoolFlag{Name: "debug, d", Usage: "Enable debugging"},
	}

	app.Commands = []cli.Command{
		cli.Command{
			Name: "foo",
			Subcommands: []cli.Command{
				{
					Name: "bar",
					Action: func(c *cli.Context) {
						if c.GlobalBool("debug") {
							subcommandRun = true
						}
					},
				},
			},
		},
	}

	app.Run([]string{"command", "-d", "foo", "bar"})

	expect(t, subcommandRun, true)
}

func main() {
	app := cli.NewApp()
	app.Name = "etcdctl"
	app.Version = version.Version
	app.Usage = "A simple command line client for etcd."
	app.Flags = []cli.Flag{
		cli.BoolFlag{Name: "debug", Usage: "output cURL commands which can be used to reproduce the request"},
		cli.BoolFlag{Name: "no-sync", Usage: "don't synchronize cluster information before sending request"},
		cli.StringFlag{Name: "output, o", Value: "simple", Usage: "output response in the given format (`simple` or `json`)"},
		cli.StringFlag{Name: "peers, C", Value: "", Usage: "a comma-delimited list of machine addresses in the cluster (default: \"127.0.0.1:4001\")"},
		cli.StringFlag{Name: "cert-file", Value: "", Usage: "identify HTTPS client using this SSL certificate file"},
		cli.StringFlag{Name: "key-file", Value: "", Usage: "identify HTTPS client using this SSL key file"},
		cli.StringFlag{Name: "ca-file", Value: "", Usage: "verify certificates of HTTPS-enabled servers using this CA bundle"},
	}
	app.Commands = []cli.Command{
		command.NewBackupCommand(),
		command.NewMakeCommand(),
		command.NewMakeDirCommand(),
		command.NewRemoveCommand(),
		command.NewRemoveDirCommand(),
		command.NewGetCommand(),
		command.NewLsCommand(),
		command.NewSetCommand(),
		command.NewSetDirCommand(),
		command.NewUpdateCommand(),
		command.NewUpdateDirCommand(),
		command.NewWatchCommand(),
		command.NewExecWatchCommand(),
		command.NewMemberCommand(),
	}

	app.Run(os.Args)
}

func TestApp_ParseSliceFlags(t *testing.T) {
	var parsedOption, firstArg string
	var parsedIntSlice []int
	var parsedStringSlice []string

	app := cli.NewApp()
	command := cli.Command{
		Name: "cmd",
		Flags: []cli.Flag{
			cli.IntSliceFlag{Name: "p", Value: &cli.IntSlice{}, Usage: "set one or more ip addr"},
			cli.StringSliceFlag{Name: "ip", Value: &cli.StringSlice{}, Usage: "set one or more ports to open"},
		},
		Action: func(c *cli.Context) {
			parsedIntSlice = c.IntSlice("p")
			parsedStringSlice = c.StringSlice("ip")
			parsedOption = c.String("option")
			firstArg = c.Args().First()
		},
	}
	app.Commands = []cli.Command{command}

	app.Run([]string{"", "cmd", "my-arg", "-p", "22", "-p", "80", "-ip", "8.8.8.8", "-ip", "8.8.4.4"})

	IntsEquals := func(a, b []int) bool {
		if len(a) != len(b) {
			return false
		}
		for i, v := range a {
			if v != b[i] {
				return false
			}
		}
		return true
	}

	StrsEquals := func(a, b []string) bool {
		if len(a) != len(b) {
			return false
		}
		for i, v := range a {
			if v != b[i] {
				return false
			}
		}
		return true
	}
	var expectedIntSlice = []int{22, 80}
	var expectedStringSlice = []string{"8.8.8.8", "8.8.4.4"}

	if !IntsEquals(parsedIntSlice, expectedIntSlice) {
		t.Errorf("%v does not match %v", parsedIntSlice, expectedIntSlice)
	}

	if !StrsEquals(parsedStringSlice, expectedStringSlice) {
		t.Errorf("%v does not match %v", parsedStringSlice, expectedStringSlice)
	}
}

func ExampleSubcommand() {
	app := cli.NewApp()
	app.Name = "say"
	app.Commands = []cli.Command{
		{
			Name:        "hello",
			ShortName:   "hi",
			Usage:       "use it to see a description",
			Description: "This is how we describe hello the function",
			Subcommands: []cli.Command{
				{
					Name:        "english",
					ShortName:   "en",
					Usage:       "sends a greeting in english",
					Description: "greets someone in english",
					Flags: []cli.Flag{
						cli.StringFlag{"name", "Bob", "Name of the person to greet"},
					},
					Action: func(c *cli.Context) {
						println("Hello, ", c.String("name"))
					},
				}, {
					Name:      "spanish",
					ShortName: "sp",
					Usage:     "sends a greeting in spanish",
					Flags: []cli.Flag{
						cli.StringFlag{"surname", "Jones", "Surname of the person to greet"},
					},
					Action: func(c *cli.Context) {
						println("Hola, ", c.String("surname"))
					},
				}, {
					Name:      "french",
					ShortName: "fr",
					Usage:     "sends a greeting in french",
					Flags: []cli.Flag{
						cli.StringFlag{"nickname", "Stevie", "Nickname of the person to greet"},
					},
					Action: func(c *cli.Context) {
						println("Bonjour, ", c.String("nickname"))
					},
				},
			},
		}, {
			Name:  "bye",
			Usage: "says goodbye",
			Action: func(c *cli.Context) {
				println("bye")
			},
		},
	}

	app.Run(os.Args)
}

func TestApp_Command(t *testing.T) {
	app := cli.NewApp()
	fooCommand := cli.Command{Name: "foobar", ShortName: "f"}
	batCommand := cli.Command{Name: "batbaz", ShortName: "b"}
	app.Commands = []cli.Command{
		fooCommand,
		batCommand,
	}

	for _, test := range commandAppTests {
		expect(t, app.Command(test.name) != nil, test.expected)
	}
}

func TestApp_Float64Flag(t *testing.T) {
	var meters float64

	app := cli.NewApp()
	app.Flags = []cli.Flag{
		cli.Float64Flag{Name: "height", Value: 1.5, Usage: "Set the height, in meters"},
	}
	app.Action = func(c *cli.Context) {
		meters = c.Float64("height")
	}

	app.Run([]string{"", "--height", "1.93"})
	expect(t, meters, 1.93)
}

func TestApp_Run(t *testing.T) {
	s := ""

	app := cli.NewApp()
	app.Action = func(c *cli.Context) {
		s = s + c.Args().First()
	}

	err := app.Run([]string{"command", "foo"})
	expect(t, err, nil)
	err = app.Run([]string{"command", "bar"})
	expect(t, err, nil)
	expect(t, s, "foobar")
}

func main() {
	app := cli.NewApp()
	app.Name = "etcdctlv3"
	app.Version = version.Version
	app.Usage = "A simple command line client for etcd3."
	app.Commands = []cli.Command{
		command.NewRangeCommand(),
		command.NewPutCommand(),
		command.NewDeleteRangeCommand(),
		command.NewTxnCommand(),
	}

	app.Run(os.Args)
}

func ExampleApp() {
	// set args for examples sake
	os.Args = []string{"greet", "--name", "Jeremy"}

	app := cli.NewApp()
	app.Name = "greet"
	app.Flags = []cli.Flag{
		cli.StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
	}
	app.Action = func(c *cli.Context) {
		fmt.Printf("Hello %v\n", c.String("name"))
	}
	app.Run(os.Args)
	// Output:
	// Hello Jeremy
}

func TestAppHelpPrinter(t *testing.T) {
	oldPrinter := cli.HelpPrinter
	defer func() {
		cli.HelpPrinter = oldPrinter
	}()

	var wasCalled = false
	cli.HelpPrinter = func(template string, data interface{}) {
		wasCalled = true
	}

	app := cli.NewApp()
	app.Run([]string{"-h"})

	if wasCalled == false {
		t.Errorf("Help printer expected to be called, but was not")
	}
}

func main() {
	app := cli.NewApp()
	app.Name = "etcdctlv3"
	app.Version = version.Version
	app.Usage = "A simple command line client for etcd3."
	app.Flags = []cli.Flag{
		cli.StringFlag{Name: "endpoint", Value: "127.0.0.1:2378", Usage: "gRPC endpoint"},
	}
	app.Commands = []cli.Command{
		command.NewRangeCommand(),
		command.NewPutCommand(),
		command.NewDeleteRangeCommand(),
		command.NewTxnCommand(),
		command.NewCompactionCommand(),
	}

	app.Run(os.Args)
}