Golang FlagSet.VarP方法代碼示例

// InstallFlags adds flags for the common options on the FlagSet
func (commonOpts *CommonOptions) InstallFlags(flags *pflag.FlagSet) {
	if dockerCertPath == "" {
		dockerCertPath = cliconfig.Dir()
	}

	flags.BoolVarP(&commonOpts.Debug, "debug", "D", false, "Enable debug mode")
	flags.StringVarP(&commonOpts.LogLevel, "log-level", "l", "info", "Set the logging level (\"debug\", \"info\", \"warn\", \"error\", \"fatal\")")
	flags.BoolVar(&commonOpts.TLS, "tls", false, "Use TLS; implied by --tlsverify")
	flags.BoolVar(&commonOpts.TLSVerify, FlagTLSVerify, dockerTLSVerify, "Use TLS and verify the remote")

	// TODO use flag flags.String("identity"}, "i", "", "Path to libtrust key file")

	commonOpts.TLSOptions = &tlsconfig.Options{
		CAFile:   filepath.Join(dockerCertPath, DefaultCaFile),
		CertFile: filepath.Join(dockerCertPath, DefaultCertFile),
		KeyFile:  filepath.Join(dockerCertPath, DefaultKeyFile),
	}
	tlsOptions := commonOpts.TLSOptions
	flags.Var(opts.NewQuotedString(&tlsOptions.CAFile), "tlscacert", "Trust certs signed only by this CA")
	flags.Var(opts.NewQuotedString(&tlsOptions.CertFile), "tlscert", "Path to TLS certificate file")
	flags.Var(opts.NewQuotedString(&tlsOptions.KeyFile), "tlskey", "Path to TLS key file")

	hostOpt := opts.NewNamedListOptsRef("hosts", &commonOpts.Hosts, opts.ValidateHost)
	flags.VarP(hostOpt, "host", "H", "Daemon socket(s) to connect to")
}

func varFlag(f *pflag.FlagSet, value pflag.Value, flagInfo cliflags.FlagInfo) {
	if flagInfo.Shorthand == "" {
		f.Var(value, flagInfo.Name, makeUsageString(flagInfo))
	} else {
		f.VarP(value, flagInfo.Name, flagInfo.Shorthand, makeUsageString(flagInfo))
	}

	setFlagFromEnv(f, flagInfo)
}

func initDeploymentFlags(fs *pflag.FlagSet, f *fg.Flags) {
	fs.StringVarP(&f.JobPath, "job", "j", defaultJobPath, "filename of the job description")
	fs.StringVarP(&f.ClusterPath, "cluster", "c", defaultClusterPath, "cluster description name or filename")
	fs.StringVarP(&f.TunnelOverride, "tunnel", "t", defaultTunnelOverride, "SSH endpoint to tunnel through with fleet (cluster override)")
	fs.StringSliceVarP(&f.Groups, "groups", "g", defaultGroups, "target task groups to deploy")
	fs.BoolVarP(&f.Force, "force", "f", defaultForce, "wheather to confirm destroy or not")
	fs.BoolVarP(&f.AutoContinue, "yes", "y", false, "auto continue on confirmation")
	fs.BoolVarP(&f.DryRun, "dry-run", "d", defaultDryRun, "wheather to schedule units or not")
	fs.UintVar(&f.ScalingGroup, "scaling-group", defaultScalingGroup, "scaling group to deploy")
	fs.BoolVarP(&f.Local, "local", "l", defaultLocal, "User local vagrant test cluster")
	fs.DurationVar(&f.StopDelay, "stop-delay", defaultStopDelay, "Time between stop and destroy")
	fs.DurationVar(&f.DestroyDelay, "destroy-delay", defaultDestroyDelay, "Time between destroy and re-create")
	fs.DurationVar(&f.SliceDelay, "slice-delay", defaultSliceDelay, "Time between update of scaling slices")
	fs.VarP(&f.Options, "option", "o", "Set an option (key=value)")

	f.VaultCACert = os.Getenv("VAULT_CACERT")
	f.VaultCAPath = os.Getenv("VAULT_CAPATH")
	fs.StringVar(&f.VaultAddr, "vault-addr", "", "URL of the vault (defaults to VAULT_ADDR environment variable)")
	fs.StringVar(&f.VaultCACert, "vault-cacert", f.VaultCACert, "Path to a PEM-encoded CA cert file to use to verify the Vault server SSL certificate")
	fs.StringVar(&f.VaultCAPath, "vault-capath", f.VaultCAPath, "Path to a directory of PEM-encoded CA cert files to verify the Vault server SSL certificate")
	fs.StringVarP(&f.GithubToken, "github-token", "G", "", "Personal github token for secret logins")
	fs.StringVar(&f.GithubTokenPath, "github-token-path", defaultGithubTokenPath, "Path of a file containing your github token")
}

// AddFlags adds all command line flags that will be used by Parse to the FlagSet
func AddFlags(flags *pflag.FlagSet) *ContainerOptions {
	copts := &ContainerOptions{
		aliases:           opts.NewListOpts(nil),
		attach:            opts.NewListOpts(ValidateAttach),
		blkioWeightDevice: NewWeightdeviceOpt(ValidateWeightDevice),
		capAdd:            opts.NewListOpts(nil),
		capDrop:           opts.NewListOpts(nil),
		dns:               opts.NewListOpts(opts.ValidateIPAddress),
		dnsOptions:        opts.NewListOpts(nil),
		dnsSearch:         opts.NewListOpts(opts.ValidateDNSSearch),
		deviceReadBps:     NewThrottledeviceOpt(ValidateThrottleBpsDevice),
		deviceReadIOps:    NewThrottledeviceOpt(ValidateThrottleIOpsDevice),
		deviceWriteBps:    NewThrottledeviceOpt(ValidateThrottleBpsDevice),
		deviceWriteIOps:   NewThrottledeviceOpt(ValidateThrottleIOpsDevice),
		devices:           opts.NewListOpts(ValidateDevice),
		env:               opts.NewListOpts(ValidateEnv),
		envFile:           opts.NewListOpts(nil),
		expose:            opts.NewListOpts(nil),
		extraHosts:        opts.NewListOpts(ValidateExtraHost),
		groupAdd:          opts.NewListOpts(nil),
		labels:            opts.NewListOpts(ValidateEnv),
		labelsFile:        opts.NewListOpts(nil),
		linkLocalIPs:      opts.NewListOpts(nil),
		links:             opts.NewListOpts(ValidateLink),
		loggingOpts:       opts.NewListOpts(nil),
		publish:           opts.NewListOpts(nil),
		securityOpt:       opts.NewListOpts(nil),
		storageOpt:        opts.NewListOpts(nil),
		sysctls:           opts.NewMapOpts(nil, opts.ValidateSysctl),
		tmpfs:             opts.NewListOpts(nil),
		ulimits:           NewUlimitOpt(nil),
		volumes:           opts.NewListOpts(nil),
		volumesFrom:       opts.NewListOpts(nil),
	}

	// General purpose flags
	flags.VarP(&copts.attach, "attach", "a", "Attach to STDIN, STDOUT or STDERR")
	flags.Var(&copts.devices, "device", "Add a host device to the container")
	flags.VarP(&copts.env, "env", "e", "Set environment variables")
	flags.Var(&copts.envFile, "env-file", "Read in a file of environment variables")
	flags.StringVar(&copts.entrypoint, "entrypoint", "", "Overwrite the default ENTRYPOINT of the image")
	flags.Var(&copts.groupAdd, "group-add", "Add additional groups to join")
	flags.StringVarP(&copts.hostname, "hostname", "h", "", "Container host name")
	flags.BoolVarP(&copts.stdin, "interactive", "i", false, "Keep STDIN open even if not attached")
	flags.VarP(&copts.labels, "label", "l", "Set meta data on a container")
	flags.Var(&copts.labelsFile, "label-file", "Read in a line delimited file of labels")
	flags.BoolVar(&copts.readonlyRootfs, "read-only", false, "Mount the container's root filesystem as read only")
	flags.StringVar(&copts.restartPolicy, "restart", "no", "Restart policy to apply when a container exits")
	flags.StringVar(&copts.stopSignal, "stop-signal", signal.DefaultStopSignal, fmt.Sprintf("Signal to stop a container, %v by default", signal.DefaultStopSignal))
	flags.Var(copts.sysctls, "sysctl", "Sysctl options")
	flags.BoolVarP(&copts.tty, "tty", "t", false, "Allocate a pseudo-TTY")
	flags.Var(copts.ulimits, "ulimit", "Ulimit options")
	flags.StringVarP(&copts.user, "user", "u", "", "Username or UID (format: <name|uid>[:<group|gid>])")
	flags.StringVarP(&copts.workingDir, "workdir", "w", "", "Working directory inside the container")
	flags.BoolVar(&copts.autoRemove, "rm", false, "Automatically remove the container when it exits")

	// Security
	flags.Var(&copts.capAdd, "cap-add", "Add Linux capabilities")
	flags.Var(&copts.capDrop, "cap-drop", "Drop Linux capabilities")
	flags.BoolVar(&copts.privileged, "privileged", false, "Give extended privileges to this container")
	flags.Var(&copts.securityOpt, "security-opt", "Security Options")
	flags.StringVar(&copts.usernsMode, "userns", "", "User namespace to use")
	flags.StringVar(&copts.credentialSpec, "credentialspec", "", "Credential spec for managed service account (Windows only)")

	// Network and port publishing flag
	flags.Var(&copts.extraHosts, "add-host", "Add a custom host-to-IP mapping (host:ip)")
	flags.Var(&copts.dns, "dns", "Set custom DNS servers")
	flags.Var(&copts.dnsOptions, "dns-opt", "Set DNS options")
	flags.Var(&copts.dnsSearch, "dns-search", "Set custom DNS search domains")
	flags.Var(&copts.expose, "expose", "Expose a port or a range of ports")
	flags.StringVar(&copts.ipv4Address, "ip", "", "Container IPv4 address (e.g. 172.30.100.104)")
	flags.StringVar(&copts.ipv6Address, "ip6", "", "Container IPv6 address (e.g. 2001:db8::33)")
	flags.Var(&copts.links, "link", "Add link to another container")
	flags.Var(&copts.linkLocalIPs, "link-local-ip", "Container IPv4/IPv6 link-local addresses")
	flags.StringVar(&copts.macAddress, "mac-address", "", "Container MAC address (e.g. 92:d0:c6:0a:29:33)")
	flags.VarP(&copts.publish, "publish", "p", "Publish a container's port(s) to the host")
	flags.BoolVarP(&copts.publishAll, "publish-all", "P", false, "Publish all exposed ports to random ports")
	// We allow for both "--net" and "--network", although the latter is the recommended way.
	flags.StringVar(&copts.netMode, "net", "default", "Connect a container to a network")
	flags.StringVar(&copts.netMode, "network", "default", "Connect a container to a network")
	flags.MarkHidden("net")
	// We allow for both "--net-alias" and "--network-alias", although the latter is the recommended way.
	flags.Var(&copts.aliases, "net-alias", "Add network-scoped alias for the container")
	flags.Var(&copts.aliases, "network-alias", "Add network-scoped alias for the container")
	flags.MarkHidden("net-alias")

	// Logging and storage
	flags.StringVar(&copts.loggingDriver, "log-driver", "", "Logging driver for the container")
	flags.StringVar(&copts.volumeDriver, "volume-driver", "", "Optional volume driver for the container")
	flags.Var(&copts.loggingOpts, "log-opt", "Log driver options")
	flags.Var(&copts.storageOpt, "storage-opt", "Storage driver options for the container")
	flags.Var(&copts.tmpfs, "tmpfs", "Mount a tmpfs directory")
	flags.Var(&copts.volumesFrom, "volumes-from", "Mount volumes from the specified container(s)")
	flags.VarP(&copts.volumes, "volume", "v", "Bind mount a volume")

	// Health-checking
	flags.StringVar(&copts.healthCmd, "health-cmd", "", "Command to run to check health")
	flags.DurationVar(&copts.healthInterval, "health-interval", 0, "Time between running the check")
	flags.IntVar(&copts.healthRetries, "health-retries", 0, "Consecutive failures needed to report unhealthy")
//.........這裏部分代碼省略.........

// AddFlags adds all command line flags that will be used by Parse to the FlagSet
func AddFlags(flags *pflag.FlagSet) *ContainerOptions {
	copts := &ContainerOptions{
		flAttach:            opts.NewListOpts(ValidateAttach),
		flVolumes:           opts.NewListOpts(nil),
		flTmpfs:             opts.NewListOpts(nil),
		flBlkioWeightDevice: NewWeightdeviceOpt(ValidateWeightDevice),
		flDeviceReadBps:     NewThrottledeviceOpt(ValidateThrottleBpsDevice),
		flDeviceWriteBps:    NewThrottledeviceOpt(ValidateThrottleBpsDevice),
		flLinks:             opts.NewListOpts(ValidateLink),
		flAliases:           opts.NewListOpts(nil),
		flDeviceReadIOps:    NewThrottledeviceOpt(ValidateThrottleIOpsDevice),
		flDeviceWriteIOps:   NewThrottledeviceOpt(ValidateThrottleIOpsDevice),
		flEnv:               opts.NewListOpts(ValidateEnv),
		flLabels:            opts.NewListOpts(ValidateEnv),
		flDevices:           opts.NewListOpts(ValidateDevice),

		flUlimits: NewUlimitOpt(nil),
		flSysctls: opts.NewMapOpts(nil, opts.ValidateSysctl),

		flPublish:     opts.NewListOpts(nil),
		flExpose:      opts.NewListOpts(nil),
		flDNS:         opts.NewListOpts(opts.ValidateIPAddress),
		flDNSSearch:   opts.NewListOpts(opts.ValidateDNSSearch),
		flDNSOptions:  opts.NewListOpts(nil),
		flExtraHosts:  opts.NewListOpts(ValidateExtraHost),
		flVolumesFrom: opts.NewListOpts(nil),
		flEnvFile:     opts.NewListOpts(nil),
		flCapAdd:      opts.NewListOpts(nil),
		flCapDrop:     opts.NewListOpts(nil),
		flGroupAdd:    opts.NewListOpts(nil),
		flSecurityOpt: opts.NewListOpts(nil),
		flStorageOpt:  opts.NewListOpts(nil),
		flLabelsFile:  opts.NewListOpts(nil),
		flLoggingOpts: opts.NewListOpts(nil),

		flPrivileged:        flags.Bool("privileged", false, "Give extended privileges to this container"),
		flPidMode:           flags.String("pid", "", "PID namespace to use"),
		flUTSMode:           flags.String("uts", "", "UTS namespace to use"),
		flUsernsMode:        flags.String("userns", "", "User namespace to use"),
		flPublishAll:        flags.BoolP("publish-all", "P", false, "Publish all exposed ports to random ports"),
		flStdin:             flags.BoolP("interactive", "i", false, "Keep STDIN open even if not attached"),
		flTty:               flags.BoolP("tty", "t", false, "Allocate a pseudo-TTY"),
		flOomKillDisable:    flags.Bool("oom-kill-disable", false, "Disable OOM Killer"),
		flOomScoreAdj:       flags.Int("oom-score-adj", 0, "Tune host's OOM preferences (-1000 to 1000)"),
		flContainerIDFile:   flags.String("cidfile", "", "Write the container ID to the file"),
		flEntrypoint:        flags.String("entrypoint", "", "Overwrite the default ENTRYPOINT of the image"),
		flHostname:          flags.StringP("hostname", "h", "", "Container host name"),
		flMemoryString:      flags.StringP("memory", "m", "", "Memory limit"),
		flMemoryReservation: flags.String("memory-reservation", "", "Memory soft limit"),
		flMemorySwap:        flags.String("memory-swap", "", "Swap limit equal to memory plus swap: '-1' to enable unlimited swap"),
		flKernelMemory:      flags.String("kernel-memory", "", "Kernel memory limit"),
		flUser:              flags.StringP("user", "u", "", "Username or UID (format: <name|uid>[:<group|gid>])"),
		flWorkingDir:        flags.StringP("workdir", "w", "", "Working directory inside the container"),
		flCPUShares:         flags.Int64P("cpu-shares", "c", 0, "CPU shares (relative weight)"),
		flCPUPercent:        flags.Int64("cpu-percent", 0, "CPU percent (Windows only)"),
		flCPUPeriod:         flags.Int64("cpu-period", 0, "Limit CPU CFS (Completely Fair Scheduler) period"),
		flCPUQuota:          flags.Int64("cpu-quota", 0, "Limit CPU CFS (Completely Fair Scheduler) quota"),
		flCpusetCpus:        flags.String("cpuset-cpus", "", "CPUs in which to allow execution (0-3, 0,1)"),
		flCpusetMems:        flags.String("cpuset-mems", "", "MEMs in which to allow execution (0-3, 0,1)"),
		flBlkioWeight:       flags.Uint16("blkio-weight", 0, "Block IO (relative weight), between 10 and 1000"),
		flIOMaxBandwidth:    flags.String("io-maxbandwidth", "", "Maximum IO bandwidth limit for the system drive (Windows only)"),
		flIOMaxIOps:         flags.Uint64("io-maxiops", 0, "Maximum IOps limit for the system drive (Windows only)"),
		flSwappiness:        flags.Int64("memory-swappiness", -1, "Tune container memory swappiness (0 to 100)"),
		flNetMode:           flags.String("net", "default", "Connect a container to a network"),
		flMacAddress:        flags.String("mac-address", "", "Container MAC address (e.g. 92:d0:c6:0a:29:33)"),
		flIPv4Address:       flags.String("ip", "", "Container IPv4 address (e.g. 172.30.100.104)"),
		flIPv6Address:       flags.String("ip6", "", "Container IPv6 address (e.g. 2001:db8::33)"),
		flIpcMode:           flags.String("ipc", "", "IPC namespace to use"),
		flPidsLimit:         flags.Int64("pids-limit", 0, "Tune container pids limit (set -1 for unlimited)"),
		flRestartPolicy:     flags.String("restart", "no", "Restart policy to apply when a container exits"),
		flReadonlyRootfs:    flags.Bool("read-only", false, "Mount the container's root filesystem as read only"),
		flLoggingDriver:     flags.String("log-driver", "", "Logging driver for container"),
		flCgroupParent:      flags.String("cgroup-parent", "", "Optional parent cgroup for the container"),
		flVolumeDriver:      flags.String("volume-driver", "", "Optional volume driver for the container"),
		flStopSignal:        flags.String("stop-signal", signal.DefaultStopSignal, fmt.Sprintf("Signal to stop a container, %v by default", signal.DefaultStopSignal)),
		flIsolation:         flags.String("isolation", "", "Container isolation technology"),
		flShmSize:           flags.String("shm-size", "", "Size of /dev/shm, default value is 64MB"),
		flNoHealthcheck:     flags.Bool("no-healthcheck", false, "Disable any container-specified HEALTHCHECK"),
		flHealthCmd:         flags.String("health-cmd", "", "Command to run to check health"),
		flHealthInterval:    flags.Duration("health-interval", 0, "Time between running the check"),
		flHealthTimeout:     flags.Duration("health-timeout", 0, "Maximum time to allow one check to run"),
		flHealthRetries:     flags.Int("health-retries", 0, "Consecutive failures needed to report unhealthy"),
		flRuntime:           flags.String("runtime", "", "Runtime to use for this container"),
	}

	flags.VarP(&copts.flAttach, "attach", "a", "Attach to STDIN, STDOUT or STDERR")
	flags.Var(&copts.flBlkioWeightDevice, "blkio-weight-device", "Block IO weight (relative device weight)")
	flags.Var(&copts.flDeviceReadBps, "device-read-bps", "Limit read rate (bytes per second) from a device")
	flags.Var(&copts.flDeviceWriteBps, "device-write-bps", "Limit write rate (bytes per second) to a device")
	flags.Var(&copts.flDeviceReadIOps, "device-read-iops", "Limit read rate (IO per second) from a device")
	flags.Var(&copts.flDeviceWriteIOps, "device-write-iops", "Limit write rate (IO per second) to a device")
	flags.VarP(&copts.flVolumes, "volume", "v", "Bind mount a volume")
	flags.Var(&copts.flTmpfs, "tmpfs", "Mount a tmpfs directory")
	flags.Var(&copts.flLinks, "link", "Add link to another container")
	flags.Var(&copts.flAliases, "net-alias", "Add network-scoped alias for the container")
	flags.Var(&copts.flDevices, "device", "Add a host device to the container")
	flags.VarP(&copts.flLabels, "label", "l", "Set meta data on a container")
	flags.Var(&copts.flLabelsFile, "label-file", "Read in a line delimited file of labels")
	flags.VarP(&copts.flEnv, "env", "e", "Set environment variables")
//.........這裏部分代碼省略.........

// BindListFlag binds a flag that expects a kube list value. Note that if the target
// comes pre-populated, that list is not erased; anything the user puts in the flag
// is added on. This is probably a bug in k8s impl of StringList.
func (i FlagInfo) BindListFlag(flags *pflag.FlagSet, target *kutil.StringList) {
	// assume flags with no longname are not desired
	if len(i.LongName) > 0 {
		flags.VarP(target, i.LongName, i.ShortName, i.Description)
	}
}