Golang flag.Args函数代码示例

func main() {
	flag.Var(&patternVar, "pattern", "which add pattern")

	flag.Parse()

	patterns := []string{
		".DS_Store",
		".DS_Store?",
		"._*",
		".Spotlight-V100",
		".Trashes",
		"ehthumbs.db",
		"Thumbs.db",
	}

	if flag.NFlag() > 0 {
		for i := 0; i < len(patternVar); i++ {
			patterns = append(patterns, patternVar[i])
		}
	}

	if len(flag.Args()) == 0 {
		clean("./", patterns)
	} else {
		for _, args := range flag.Args() {
			clean(args, patterns)
		}
	}
}

func main() {
	password := flag.String("password", "", "Password for all redis instances")
	db := flag.Int("db", 0, "DB number")
	socket := flag.String("socket", "/tmp/redis-monitor.sock", "Socket to provide metrics over")
	flag.Parse()
	if len(flag.Args()) < 1 {
		flag.Usage()
		os.Exit(1)
	}
	s := &http.Server{
		Handler: &Addresses{
			Addr:     flag.Args(),
			Password: *password,
			DB:       int64(*db),
		},
	}

	l, err := util.CreateSocket(*socket)

	go func() {
		log.Println(http.ListenAndServe("localhost:6060", nil))
	}()

	defer profile.Start(profile.MemProfile).Stop()

	if err != nil {
		panic(err)
	}

	if err := s.Serve(l); err != nil {
		panic(err)
	}
}

func main() {
	var bindAddress string
	var port int

	flag.IntVar(&port, "port", 9125, "Port to listen on")
	flag.IntVar(&port, "p", 9125, "Port to listen on")

	flag.StringVar(&bindAddress, "bind", "0.0.0.0", "IP Address to listen on")
	flag.StringVar(&bindAddress, "b", "0.0.0.0", "IP Address to listen on")

	flag.StringVar(&prefix, "prefix", "statsrelay", "The prefix to use with self generated stats")

	flag.BoolVar(&verbose, "verbose", false, "Verbose output")
	flag.BoolVar(&verbose, "v", false, "Verbose output")

	flag.Parse()

	if len(flag.Args()) == 0 {
		log.Fatalf("One or most host specifications are needed to locate statsd daemons.\n")
	}

	hashRing = consistent.New()
	hashRing.NumberOfReplicas = 1

	for _, v := range flag.Args() {
		var addr *net.UDPAddr
		var err error
		host := strings.Split(v, ":")

		switch len(host) {
		case 1:
			log.Printf("Invalid statsd location: %s\n", v)
			log.Fatalf("Must be of the form HOST:PORT or HOST:PORT:INSTANCE\n")
		case 2:
			addr, err = net.ResolveUDPAddr("udp", v)
			if err != nil {
				log.Printf("Error parsing HOST:PORT \"%s\"\n", v)
				log.Fatalf("%s\n", err.Error())
			}
		case 3:
			addr, err = net.ResolveUDPAddr("udp", host[0]+":"+host[1])
			if err != nil {
				log.Printf("Error parsing HOST:PORT:INSTANCE \"%s\"\n", v)
				log.Fatalf("%s\n", err.Error())
			}
		default:
			log.Fatalf("Unrecongnized host specification: %s\n", v)
		}

		if addr != nil {
			udpAddr[v] = addr
			hashRing.Add(v)
		}
	}

	epochTime = time.Now().Unix()
	runServer(bindAddress, port)

	log.Printf("Normal shutdown.\n")
}

func main() {
	defer util.Run()()
	var ring *pfring.Ring
	var err error
	if ring, err = pfring.NewRing(*iface, uint32(*snaplen), pfring.FlagPromisc); err != nil {
		log.Fatalln("pfring ring creation error:", err)
	}
	if len(flag.Args()) > 0 {
		bpffilter := strings.Join(flag.Args(), " ")
		fmt.Fprintf(os.Stderr, "Using BPF filter %q\n", bpffilter)
		if err = ring.SetBPFFilter(bpffilter); err != nil {
			log.Fatalln("BPF filter error:", err)
		}
	}
	if *cluster >= 0 {
		if err = ring.SetCluster(*cluster, pfring.ClusterType(*clustertype)); err != nil {
			log.Fatalln("pfring SetCluster error:", err)
		}
	}
	if err = ring.SetSocketMode(pfring.ReadOnly); err != nil {
		log.Fatalln("pfring SetSocketMode error:", err)
	} else if err = ring.Enable(); err != nil {
		log.Fatalln("pfring Enable error:", err)
	}
	dumpcommand.Run(ring)
}

func main() {
	algo := flag.Int("a", 256, "SHA hash algorithm (one of 256, 384, or 512)")
	check := flag.Bool("c", false, "read SHA sums from the files and check them")
	hidden := flag.Bool("d", false, "sum hidden (dot) files")
	flag.Parse()

	progName = filepath.Base(os.Args[0])
	sumHidden = *hidden

	switch *algo {
	case 1:
		sumFunc = sum1
	case 256:
		sumFunc = sum256
	case 384:
		sumFunc = sum384
	case 512:
		sumFunc = sum512
	default:
		fmt.Println("Unrecognised algorithm.")
		os.Exit(1)
	}

	if *check {
		checkFile(flag.Args())
	} else {
		for _, root := range flag.Args() {
			err := filepath.Walk(root, walker)
			if err != nil {
				fmt.Printf("%v\n", err)
			}
		}
	}
}

func main() {
	if e := os.Getenv("DOOZER_URI"); e != "" {
		*uri = e
	}

	if e := os.Getenv("DOOZER_BOOT_URI"); e != "" {
		*buri = e
	}

	flag.Usage = usage
	flag.Parse()

	if *showHelp {
		usage()
		return
	}

	if *showVersion {
		fmt.Println("doozer", version)
		return
	}

	if flag.NArg() < 1 {
		fmt.Fprintf(os.Stderr, "%s: missing command\n", os.Args[0])
		usage()
		os.Exit(127)
	}

	cmd := flag.Arg(0)

	c, ok := cmds[cmd]
	if !ok {
		fmt.Fprintln(os.Stderr, "Unknown command:", cmd)
		usage()
		os.Exit(127)
	}

	os.Args = flag.Args()
	flag.Parse()

	if *showHelp {
		help(cmd)
		return
	}

	args := flag.Args()
	ft := reflect.TypeOf(c.f)
	if len(args) != ft.NumIn() {
		fmt.Fprintf(os.Stderr, "%s: wrong number of arguments\n", cmd)
		help(cmd)
		os.Exit(127)
	}

	vals := make([]reflect.Value, len(args))
	for i, s := range args {
		vals[i] = reflect.ValueOf(s)
	}
	fv := reflect.ValueOf(c.f)
	fv.Call(vals)
}

func main() {
	flag.Parse()
	var handle *pcap.Handle
	var err error
	if *fname != "" {
		if handle, err = pcap.OpenOffline(*fname); err != nil {
			log.Fatalln("PCAP OpenOffline error:", err)
		}
	} else {
		if handle, err = pcap.OpenLive(*iface, int32(*snaplen), true, time.Second); err != nil {
			log.Fatalln("PCAP OpenLive error:", err)
		}
		if *tstype != "" {
			if t, err := pcap.TimestampSourceFromString(*tstype); err != nil {
				log.Fatalf("Supported timestamp types: %v", handle.SupportedTimestamps())
			} else if err := handle.SetTimestampSource(t); err != nil {
				log.Fatalf("Supported timestamp types: %v", handle.SupportedTimestamps())
			}
		}
		if len(flag.Args()) > 0 {
			bpffilter := strings.Join(flag.Args(), " ")
			fmt.Fprintf(os.Stderr, "Using BPF filter %q\n", bpffilter)
			if err = handle.SetBPFFilter(bpffilter); err != nil {
				log.Fatalln("BPF filter error:", err)
			}
		}
	}
	dumpcommand.Run(handle)
}

func main() {
	flag.Parse()
	if len(flag.Args()) < 2 {
		flag.PrintDefaults()
		log.Fatalf("usage: chmod mode filepath")
	}

	octval, err := strconv.ParseUint(flag.Args()[0], 8, 32)
	if err != nil {
		log.Fatalf("Unable to decode mode. Please use an octal value. arg was %s, err was %v", flag.Args()[0], err)
	} else if octval > 0777 {
		log.Fatalf("Invalid octal value. Value larger than 777, was %o", octval)
	}

	mode := uint32(octval)

	var errors string
	for _, arg := range flag.Args()[1:] {
		if err := syscall.Chmod(arg, mode); err != nil {
			errors += fmt.Sprintf("Unable to chmod, filename was %s, err was %v\n", arg, err)
		}
	}
	if errors != "" {
		log.Fatalf(errors)
	}

}

func main() {
	cbServ := flag.String("couchbase", "http://localhost:8091/",
		"URL to couchbase")
	cbBucket := flag.String("bucket", "default", "couchbase bucket")
	includeExt := flag.Bool("includeExt", false, "include file extension in document ID")
	verbose := flag.Bool("v", false, "verbose output")

	flag.Parse()

	b, err := couchbase.GetBucket(*cbServ, "default", *cbBucket)
	maybeFatal(err, "Error connecting to couchbase: %v\n", err)

	for _, filename := range flag.Args() {
		key := pathToID(filename, *includeExt)
		bytes, err := ioutil.ReadFile(filename)
		maybeFatal(err, "Error reading file contents: %v\n", err)
		b.SetRaw(key, 0, bytes)
		if *verbose {
			fmt.Printf("Loaded %s to key %s\n", filename, key)
		}
	}
	if *verbose {
		fmt.Printf("Loaded %d documents into bucket %s\n", len(flag.Args()), *cbBucket)
	}
}

func main() {
	flag.Parse()
	if *h || len(flag.Args()) == 0 {
		flag.Usage()
		return
	}

	root, err := url.Parse(*addr)
	if err != nil {
		log.Fatalf("Error parsing server address: %v", err)
	}

	destPath := flag.Args()[0]
	root.Path = path.Join(root.Path, destPath)

	if *write {
		doWrite(root)
	} else {
		res, err := http.Get(root.String())
		if err != nil {
			log.Fatalf("Error fetching from server: %v", err)
		}
		if res.StatusCode == 500 || res.StatusCode == 404 {
			log.Printf("Invalid status code %v", res.StatusCode)
			log.Printf("Status text: %v", res.Status)
			res.Body.Close()
			return
		} else {
			editFile(root, res.Body, *editor, flag.Args()[1:]...)
		}
	}
}

// getFileHandles uses our arguments to set up our input and output files
func getFileHandles() (in, out *os.File, err error) {
	// Input file should be our only command line argument
	if len(flag.Args()) != 1 {
		err = fmt.Errorf("Must have exactly one argument (input filename).  Received: %v",
			flag.Args())
		return
	}
	in, err = os.Open(flag.Arg(0))
	if err != nil {
		err = fmt.Errorf("Error: Unable to open input file %v: %v", flag.Arg(0),
			err)
		return
	}

	// Output file
	out = os.Stdout
	if *output != "-" {
		out, err = os.Create(*output)
		if err != nil {
			err = fmt.Errorf("Error: Unable to open output file %v: %v", *output,
				err)
			return
		}
	}

	return
}

func main() {
	flag.Usage = usage
	flag.Parse()

	command := ""
	if flag.NArg() > 0 {
		command = flag.Arg(0)
		switch command {
		case "convert":
			if flag.NArg() <= 1 {
				fmt.Fprintln(os.Stderr, "missing cover profile")
				os.Exit(1)
			}
			if err := convertProfiles(flag.Args()[1:]...); err != nil {
				fmt.Fprintln(os.Stderr, "error:", err)
				os.Exit(1)
			}
		case "annotate":
			os.Exit(annotateSource())
		case "report":
			os.Exit(reportCoverage())
		case "test":
			if err := runTests(flag.Args()[1:]); err != nil {
				fmt.Fprintln(os.Stderr, "error:", err)
				os.Exit(1)
			}
		default:
			fmt.Fprintf(os.Stderr, "Unknown command: %#q\n\n", command)
			usage()
		}
	} else {
		usage()
	}
}

func main() {
	var debugMode = flag.Bool("debug", false, "Enable debug messages")

	flag.Parse()

	if len(flag.Args()) != 1 {
		usage()
		os.Exit(1)
	}

	if *debugMode {
		enableDebugMode(*debugMode)
		InfoLogger.Print("Enabling debug messages")
	}

	config, err := parseConfig(flag.Args()[0])

	if err != nil {
		ErrorLogger.Printf("Error while parsing the configuration file: %s\n", err)
		os.Exit(1)
	}

	handler := NewProxyHandler(config)

	listenAddress := fmt.Sprintf("%s:%d", config.Server.Address, config.Server.Port)
	http.ListenAndServe(listenAddress, handler)
}

func main() {
	flag.Parse()
	// To see logs, use the -logtostderr flag and change the verbosity with
	// -v 0 (less verbose) up to -v 5 (more verbose).
	if len(flag.Args()) != 1 {
		fmt.Fprintf(os.Stderr, "Usage: %v <infohash>\n\n", os.Args[0])
		fmt.Fprintf(os.Stderr, "Example infohash: %v\n", exampleIH)
		flag.PrintDefaults()
		os.Exit(1)
	}
	ih, err := dht.DecodeInfoHash(flag.Args()[0])
	if err != nil {
		fmt.Fprintf(os.Stderr, "DecodeInfoHash error: %v\n", err)
		os.Exit(1)
	}
	// Starts a DHT node with the default options. It picks a random UDP port. To change this, see dht.NewConfig.
	d, err := dht.New(nil)
	if err != nil {
		fmt.Fprintf(os.Stderr, "New DHT error: %v", err)
		os.Exit(1)

	}
	// For debugging.
	go http.ListenAndServe(fmt.Sprintf(":%d", httpPortTCP), nil)

	go d.Run()
	go drainresults(d)

	for {
		d.PeersRequest(string(ih), false)
		time.Sleep(5 * time.Second)
	}
}

func main() {
	flag.Parse()
	if len(flag.Args()) != 1 {
		log.Fatal("Usage: go run goprint.go path")
	}
	bpkg, err := build.Default.Import(flag.Args()[0], ".", 0)
	if err != nil {
		log.Fatal(err)
	}
	fset := token.NewFileSet()
	files := make(map[string]*ast.File)
	for _, fname := range bpkg.GoFiles {
		p, err := ioutil.ReadFile(filepath.Join(bpkg.SrcRoot, bpkg.ImportPath, fname))
		if err != nil {
			log.Fatal(err)
		}
		file, err := parser.ParseFile(fset, fname, p, parser.ParseComments)
		if err != nil {
			log.Fatal(err)
		}
		files[fname] = file
	}
	c := spew.NewDefaultConfig()
	c.DisableMethods = true
	apkg, _ := ast.NewPackage(fset, files, importer, nil)
	c.Dump(apkg)
	ast.Print(fset, apkg)
	dpkg := doc.New(apkg, bpkg.ImportPath, 0)
	c.Dump(dpkg)
}