Golang mflag.StringVar函数代码示例

func init() {
	// Check https://github.com/docker/docker/blob/master/pkg/mflag/example/example.go
	flag.StringVar(&path, []string{"p", "#pathhidden", "-path"}, "", "path to traverse")
	flag.StringVar(&path, []string{"n", "#namehidden", "-name"}, "", "name to traverse")
	flag.BoolVar(&h, []string{"h", "#help", "-help"}, false, "display the help")
	flag.Parse()
}

func installFlags() {
	flag.BoolVar(&flDebug, []string{"D", "-debug"}, false, "Enable debug mode")
	flag.StringVar(&flLogLevel, []string{"l", "-log-level"}, "info", "Set the logging level")
	flag.StringVar(&root, []string{"g", "-graph"}, "/var/lib/docker", "Path to use as the root of the graph driver")
	opts.ListVar(&graphOptions, []string{"-storage-opt"}, "Set storage driver options")
	flag.StringVar(&graphDriver, []string{"s", "-storage-driver"}, "", "Force the runtime to use a specific storage driver")
}

func init() {
	var placeholderTrustKey string
	// TODO use flag flag.String([]string{"i", "-identity"}, "", "Path to libtrust key file")
	flTrustKey = &placeholderTrustKey

	flag.StringVar(&tlsOptions.CAFile, []string{"-tlscacert"}, filepath.Join(dockerCertPath, defaultCaFile), "Trust certs signed only by this CA")
	flag.StringVar(&tlsOptions.CertFile, []string{"-tlscert"}, filepath.Join(dockerCertPath, defaultCertFile), "Path to TLS certificate file")
	flag.StringVar(&tlsOptions.KeyFile, []string{"-tlskey"}, filepath.Join(dockerCertPath, defaultKeyFile), "Path to TLS key file")
	opts.HostListVar(&flHosts, []string{"H", "-host"}, "Daemon socket(s) to connect to")

	flag.Usage = func() {
		fmt.Fprint(os.Stdout, "Usage: docker [OPTIONS] COMMAND [arg...]\n\nA self-sufficient runtime for linux containers.\n\nOptions:\n")

		flag.CommandLine.SetOutput(os.Stdout)
		flag.PrintDefaults()

		help := "\nCommands:\n"

		sort.Sort(byName(dockerCommands))

		for _, cmd := range dockerCommands {
			help += fmt.Sprintf("    %-10.10s%s\n", cmd.name, cmd.description)
		}

		help += "\nRun 'docker COMMAND --help' for more information on a command."
		fmt.Fprintf(os.Stdout, "%s\n", help)
	}
}

func readConfig() {
	var (
		configFile            string
		showHelp, showVersion bool
	)
	logFilter = &logutils.LevelFilter{
		Levels:   logLevels,
		MinLevel: logMinLevel,
		Writer:   os.Stderr,
	}
	log.SetOutput(logFilter)
	flag.StringVar(&configFile, []string{"c", "-config"}, "/etc/logear/logear.conf", "config file")
	flag.StringVar(&logFile, []string{"l", "-log"}, "", "log file")
	flag.BoolVar(&showHelp, []string{"h", "-help"}, false, "display the help")
	flag.BoolVar(&showVersion, []string{"v", "-version"}, false, "display version info")
	flag.Parse()
	if showHelp {
		flag.Usage()
		os.Exit(0)
	}
	if showVersion {
		println(versionstring)
		println("OS: " + runtime.GOOS)
		println("Architecture: " + runtime.GOARCH)
		os.Exit(0)
	}
	parseTomlFile(configFile)
	startLogging()
	log.Printf("%s started with pid %d", versionstring, os.Getpid())
}

func init() {
	flag.StringVar(&tplfile, []string{"t", "-template"}, "", "Template file name for produce config file.")
	flag.StringVar(&appName, []string{"-app"}, "appname", "App name for upstream/logfile name/conf name/consul key.")
	flag.StringVar(&output, []string{"o", "-output"}, "appname.conf", "Config file name for save config file.")
	flag.BoolVar(&help, []string{"h", "-help"}, false, "Display the help")
	flag.Parse()
}

// InstallFlags adds command-line options to the top-level flag parser for
// the current process.
// Subsequent calls to `flag.Parse` will populate config with values parsed
// from the command-line.
func (config *Config) InstallFlags() {
	flag.StringVar(&config.Pidfile, []string{"p", "-pidfile"}, "/var/run/docker.pid", "Path to use for daemon PID file")
	flag.StringVar(&config.Root, []string{"g", "-graph"}, "/var/lib/docker", "Root of the Docker runtime")
	flag.BoolVar(&config.AutoRestart, []string{"#r", "#-restart"}, true, "--restart on the daemon has been deprecated in favor of --restart policies on docker run")
	flag.BoolVar(&config.EnableIptables, []string{"#iptables", "-iptables"}, true, "Enable addition of iptables rules")
	flag.BoolVar(&config.EnableIpForward, []string{"#ip-forward", "-ip-forward"}, true, "Enable net.ipv4.ip_forward")
	flag.BoolVar(&config.EnableIpMasq, []string{"-ip-masq"}, true, "Enable IP masquerading")
	flag.BoolVar(&config.EnableIPv6, []string{"-ipv6"}, false, "Enable IPv6 networking")
	flag.StringVar(&config.BridgeIP, []string{"#bip", "-bip"}, "", "Specify network bridge IP")
	flag.StringVar(&config.BridgeIface, []string{"b", "-bridge"}, "", "Attach containers to a network bridge")
	flag.StringVar(&config.FixedCIDR, []string{"-fixed-cidr"}, "", "IPv4 subnet for fixed IPs")
	flag.StringVar(&config.FixedCIDRv6, []string{"-fixed-cidr-v6"}, "", "IPv6 subnet for fixed IPs")
	flag.BoolVar(&config.InterContainerCommunication, []string{"#icc", "-icc"}, true, "Enable inter-container communication")
	flag.StringVar(&config.GraphDriver, []string{"s", "-storage-driver"}, "", "Storage driver to use")
	flag.StringVar(&config.ExecDriver, []string{"e", "-exec-driver"}, "native", "Exec driver to use")
	flag.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, "Enable selinux support")
	flag.IntVar(&config.Mtu, []string{"#mtu", "-mtu"}, 0, "Set the containers network MTU")
	flag.StringVar(&config.SocketGroup, []string{"G", "-group"}, "docker", "Group for the unix socket")
	flag.BoolVar(&config.EnableCors, []string{"#api-enable-cors", "#-api-enable-cors"}, false, "Enable CORS headers in the remote API, this is deprecated by --api-cors-header")
	flag.StringVar(&config.CorsHeaders, []string{"-api-cors-header"}, "", "Set CORS headers in the remote API")
	opts.IPVar(&config.DefaultIp, []string{"#ip", "-ip"}, "0.0.0.0", "Default IP when binding container ports")
	opts.ListVar(&config.GraphOptions, []string{"-storage-opt"}, "Set storage driver options")
	// FIXME: why the inconsistency between "hosts" and "sockets"?
	opts.IPListVar(&config.Dns, []string{"#dns", "-dns"}, "DNS server to use")
	opts.DnsSearchListVar(&config.DnsSearch, []string{"-dns-search"}, "DNS search domains to use")
	opts.LabelListVar(&config.Labels, []string{"-label"}, "Set key=value labels to the daemon")
	config.Ulimits = make(map[string]*ulimit.Ulimit)
	opts.UlimitMapVar(config.Ulimits, []string{"-default-ulimit"}, "Set default ulimits for containers")
}

func init() {
	flag.StringVar(&tplfile, []string{"t", "-template"}, "server.conf.template", "Template file name for produce config file.")
	flag.StringVar(&appName, []string{"-app"}, "appname", "App name for upstream/logfile name/conf name/consul key.")
	flag.StringVar(&consulIp, []string{"c", "-consul"}, "10.10.10.10:8500", "Consul server 'url:port' for get upstream info.")
	flag.StringVar(&virtualIp, []string{"v", "-virtualip"}, "0.0.0.0:81,0.0.0.1", "Virtual IP/PORT list for this app.")
	flag.StringVar(&output, []string{"o", "-output"}, "appname.conf", "Config file name for save config file.")
	flag.BoolVar(&help, []string{"h", "-help"}, false, "Display the help")
	flag.Parse()
}

func init() {
	flag.Bool([]string{"#hp", "#-halp"}, false, "display the halp")
	flag.BoolVar(&b, []string{"b", "#bal", "#bol", "-bal"}, false, "a simple bool")
	flag.BoolVar(&b, []string{"g", "#gil"}, false, "a simple bool")
	flag.BoolVar(&b2, []string{"#-bool"}, false, "a simple bool")
	flag.IntVar(&i, []string{"-integer", "-number"}, -1, "a simple integer")
	flag.StringVar(&str, []string{"s", "#hidden", "-string"}, "", "a simple string") //-s -hidden and --string will work, but -hidden won't be in the usage
	flag.BoolVar(&h, []string{"h", "#help", "-help"}, false, "display the help")
	flag.StringVar(&str, []string{"mode"}, "mode1", "set the mode\nmode1: use the mode1\nmode2: use the mode2\nmode3: use the mode3")
	flag.Parse()
}

func init() {
	logrus.SetOutput(os.Stdout)
	logrus.SetLevel(logrus.DebugLevel)
	mflag.BoolVar(&master, []string{"m", "-master", "#mt"}, false, "if the master server.")
	mflag.BoolVar(&help, []string{"h", "-help", "#hhhhelp"}, false, "show help.")
	mflag.StringVar(&env, []string{"e", "-env"}, "test", "which config env to run.")
	// mflag.BoolVar(&picture, []string{"i", "-image"}, false, "download the picture that go throuth.")
	mflag.StringVar(&conffile, []string{"f", "-config"}, "", "point a config file.default is config/config.json.")
	mflag.Parse()

}

func init() {
	flag.Bool([]string{"h", "-help"}, false, "Display help")
	flag.BoolVar(&verbose, []string{"v", "-verbose"}, false, "Switch to verbose output")
	flag.BoolVar(&print_digest, []string{"d", "-digest"}, false, "Print also digest of manifest")
	flag.StringVar(&key, []string{"k", "-key-file"}, "", "Private key with which to sign")
	flag.Parse()
}

// InstallFlags adds command-line options to the top-level flag parser for
// the current process.
// Subsequent calls to `flag.Parse` will populate config with values parsed
// from the command-line.
func (config *Config) InstallFlags() {
	// First handle install flags which are consistent cross-platform
	config.InstallCommonFlags()

	// Then platform-specific install flags.
	flag.StringVar(&config.Bridge.VirtualSwitchName, []string{"b", "-bridge"}, "", "Attach containers to a virtual switch")
}

func main() {
	mflag.BoolVar(&useScheduler, []string{"scheduler"}, false, "Use scheduler to distribute tests across shards")
	mflag.BoolVar(&runParallel, []string{"parallel"}, false, "Run tests in parallel on hosts where possible")
	mflag.BoolVar(&verbose, []string{"v"}, false, "Print output from all tests (Also enabled via DEBUG=1)")
	mflag.StringVar(&schedulerHost, []string{"scheduler-host"}, defaultSchedulerHost, "Hostname of scheduler.")
	mflag.Parse()

	if len(os.Getenv("DEBUG")) > 0 {
		verbose = true
	}

	tests, err := getTests(mflag.Args())
	if err != nil {
		fmt.Printf("Error parsing tests: %v\n", err)
		os.Exit(1)
	}

	hosts := strings.Fields(os.Getenv("HOSTS"))
	maxHosts := len(hosts)
	if maxHosts == 0 {
		fmt.Print("No HOSTS specified.\n")
		os.Exit(1)
	}

	var errored bool
	if runParallel {
		errored = parallel(tests, hosts)
	} else {
		errored = sequential(tests, hosts)
	}

	if errored {
		os.Exit(1)
	}
}

func main() {
	var (
		as        []string
		hostMatch string
	)
	mflagext.ListVar(&as, []string{"a", "-alias"}, []string{}, "Specify hostname aliases in the form alias:hostname.  Can be repeated.")
	mflag.StringVar(&hostMatch, []string{"h", "-host-match"}, "*.weave.local", "Specify main host shExpMatch expression in pacfile")
	mflag.Parse()

	var aliases = map[string]string{}
	for _, a := range as {
		parts := strings.SplitN(a, ":", 2)
		if len(parts) != 2 {
			fmt.Printf("'%s' is not a valid alias.\n", a)
			mflag.Usage()
			os.Exit(1)
		}
		aliases[parts[0]] = parts[1]
	}

	go socksProxy(aliases)

	t := template.Must(template.New("pacfile").Parse(pacfile))
	http.HandleFunc("/proxy.pac", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/x-ns-proxy-autoconfig")
		t.Execute(w, pacFileParameters{hostMatch, aliases})
	})

	if err := http.ListenAndServe(":8080", nil); err != nil {
		panic(err)
	}
}

func main() {
	var (
		justVersion bool
		logLevel    = "info"
		c           proxy.Config
		withDNS     bool
	)

	c.Version = version

	mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
	mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
	mflagext.ListVar(&c.ListenAddrs, []string{"H"}, nil, "addresses on which to listen")
	mflag.StringVar(&c.HostnameFromLabel, []string{"-hostname-from-label"}, "", "Key of container label from which to obtain the container's hostname")
	mflag.StringVar(&c.HostnameMatch, []string{"-hostname-match"}, "(.*)", "Regexp pattern to apply on container names (e.g. '^aws-[0-9]+-(.*)$')")
	mflag.StringVar(&c.HostnameReplacement, []string{"-hostname-replacement"}, "$1", "Expression to generate hostnames based on matches from --hostname-match (e.g. 'my-app-$1')")
	mflag.BoolVar(&c.RewriteInspect, []string{"-rewrite-inspect"}, false, "Rewrite 'inspect' calls to return the weave network settings (if attached)")
	mflag.BoolVar(&c.NoDefaultIPAM, []string{"#-no-default-ipam", "-no-default-ipalloc"}, false, "do not automatically allocate addresses for containers without a WEAVE_CIDR")
	mflag.BoolVar(&c.NoRewriteHosts, []string{"-no-rewrite-hosts"}, false, "do not automatically rewrite /etc/hosts. Use if you need the docker IP to remain in /etc/hosts")
	mflag.StringVar(&c.TLSConfig.CACert, []string{"#tlscacert", "-tlscacert"}, "", "Trust certs signed only by this CA")
	mflag.StringVar(&c.TLSConfig.Cert, []string{"#tlscert", "-tlscert"}, "", "Path to TLS certificate file")
	mflag.BoolVar(&c.TLSConfig.Enabled, []string{"#tls", "-tls"}, false, "Use TLS; implied by --tlsverify")
	mflag.StringVar(&c.TLSConfig.Key, []string{"#tlskey", "-tlskey"}, "", "Path to TLS key file")
	mflag.BoolVar(&c.TLSConfig.Verify, []string{"#tlsverify", "-tlsverify"}, false, "Use TLS and verify the remote")
	mflag.BoolVar(&withDNS, []string{"#-with-dns", "#w"}, false, "option removed")
	mflag.BoolVar(&c.WithoutDNS, []string{"-without-dns"}, false, "instruct created containers to never use weaveDNS as their nameserver")
	mflag.BoolVar(&c.NoMulticastRoute, []string{"-no-multicast-route"}, false, "do not add a multicast route via the weave interface when attaching containers")
	mflag.Parse()

	if justVersion {
		fmt.Printf("weave proxy  %s\n", version)
		os.Exit(0)
	}

	SetLogLevel(logLevel)

	Log.Infoln("weave proxy", version)
	Log.Infoln("Command line arguments:", strings.Join(os.Args[1:], " "))

	if withDNS {
		Log.Warning("--with-dns option has been removed; DNS is on by default")
	}

	c.Image = getenv("EXEC_IMAGE", "weaveworks/weaveexec")
	c.DockerBridge = getenv("DOCKER_BRIDGE", "docker0")
	c.DockerHost = getenv("DOCKER_HOST", "unix:///var/run/docker.sock")
	c.ProcPath = getenv("PROCFS", "/proc")

	p, err := proxy.NewProxy(c)
	if err != nil {
		Log.Fatalf("Could not start proxy: %s", err)
	}
	defer p.Stop()

	listeners := p.Listen()
	p.AttachExistingContainers()
	go p.Serve(listeners)
	go p.ListenAndServeStatus("/home/weave/status.sock")
	SignalHandlerLoop()
}

// InstallFlags adds command-line options to the top-level flag parser for
// the current process.
// Subsequent calls to `flag.Parse` will populate config with values parsed
// from the command-line.
func (config *Config) InstallFlags() {
	flag.StringVar(&config.Pidfile, []string{"p", "-pidfile"}, "/var/run/docker.pid", "Path to use for daemon PID file")
	flag.StringVar(&config.Root, []string{"g", "-graph"}, "/var/lib/docker", "Path to use as the root of the Docker runtime")
	flag.BoolVar(&config.AutoRestart, []string{"#r", "#-restart"}, true, "--restart on the daemon has been deprecated in favor of --restart policies on docker run")
	flag.BoolVar(&config.EnableIptables, []string{"#iptables", "-iptables"}, true, "Enable Docker's addition of iptables rules")
	flag.BoolVar(&config.EnableIpForward, []string{"#ip-forward", "-ip-forward"}, true, "Enable net.ipv4.ip_forward")
	flag.BoolVar(&config.EnableIpMasq, []string{"-ip-masq"}, true, "Enable IP masquerading for bridge's IP range")
	flag.StringVar(&config.BridgeIP, []string{"#bip", "-bip"}, "", "Use this CIDR notation address for the network bridge's IP, not compatible with -b")
	flag.StringVar(&config.BridgeIface, []string{"b", "-bridge"}, "", "Attach containers to a pre-existing network bridge\nuse 'none' to disable container networking")
	flag.StringVar(&config.FixedCIDR, []string{"-fixed-cidr"}, "", "IPv4 subnet for fixed IPs (ex: 10.20.0.0/16)\nthis subnet must be nested in the bridge subnet (which is defined by -b or --bip)")
	opts.ListVar(&config.InsecureRegistries, []string{"-insecure-registry"}, "Enable insecure communication with specified registries (no certificate verification for HTTPS and enable HTTP fallback) (e.g., localhost:5000 or 10.20.0.0/16)")
	flag.BoolVar(&config.InterContainerCommunication, []string{"#icc", "-icc"}, true, "Enable inter-container communication")
	flag.StringVar(&config.GraphDriver, []string{"s", "-storage-driver"}, "", "Force the Docker runtime to use a specific storage driver")
	flag.StringVar(&config.ExecDriver, []string{"e", "-exec-driver"}, "native", "Force the Docker runtime to use a specific exec driver")
	flag.BoolVar(&config.EnableSelinuxSupport, []string{"-selinux-enabled"}, false, "Enable selinux support. SELinux does not presently support the BTRFS storage driver")
	flag.IntVar(&config.Mtu, []string{"#mtu", "-mtu"}, 0, "Set the containers network MTU\nif no value is provided: default to the default route MTU or 1500 if no default route is available")
	opts.IPVar(&config.DefaultIp, []string{"#ip", "-ip"}, "0.0.0.0", "Default IP address to use when binding container ports")
	opts.ListVar(&config.GraphOptions, []string{"-storage-opt"}, "Set storage driver options")
	// FIXME: why the inconsistency between "hosts" and "sockets"?
	opts.IPListVar(&config.Dns, []string{"#dns", "-dns"}, "Force Docker to use specific DNS servers")
	opts.DnsSearchListVar(&config.DnsSearch, []string{"-dns-search"}, "Force Docker to use specific DNS search domains")
	opts.MirrorListVar(&config.Mirrors, []string{"-registry-mirror"}, "Specify a preferred Docker registry mirror")
	opts.LabelListVar(&config.Labels, []string{"-label"}, "Set key=value labels to the daemon (displayed in `docker info`)")

	// Localhost is by default considered as an insecure registry
	// This is a stop-gap for people who are running a private registry on localhost (especially on Boot2docker).
	//
	// TODO: should we deprecate this once it is easier for people to set up a TLS registry or change
	// daemon flags on boot2docker?
	// If so, do not forget to check the TODO in TestIsSecure
	config.InsecureRegistries = append(config.InsecureRegistries, "127.0.0.0/8")
}