func appList(c *cli.Context) {
	initStore(c)
	err := commander.AppList(configStore, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func poolCreate(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)
	initStore(c)
	created, err := configStore.CreatePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: Could not create pool: %s", err)
		return
	}

	if created {
		log.Printf("Pool %s created\n", utils.GalaxyPool(c))
	} else {
		log.Printf("Pool %s already exists\n", utils.GalaxyPool(c))
	}

	ec2host, err := runtime.EC2PublicHostname()
	if err != nil || ec2host == "" {
		log.Debug("not running from AWS, skipping pool creation")
		return
	}

	// now create the cloudformation stack
	// is this fails, the stack can be created separately with
	// stack:create_pool
	stackCreatePool(c)
}

func poolList(c *cli.Context) {
	initStore(c)

	envs := []string{utils.GalaxyEnv(c)}
	if utils.GalaxyEnv(c) == "" {
		var err error
		envs, err = configStore.ListEnvs()
		if err != nil {
			log.Fatalf("ERROR: %s", err)
		}
	}

	columns := []string{"ENV | POOL | APPS "}

	for _, env := range envs {
		pools, err := configStore.ListPools(env)
		if err != nil {
			log.Fatalf("ERROR: cannot list pools: %s", err)
			return
		}

		if len(pools) == 0 {
			columns = append(columns, strings.Join([]string{
				env,
				"",
				""}, " | "))
			continue
		}

		for _, pool := range pools {

			assigments, err := configStore.ListAssignments(env, pool)
			if err != nil {
				log.Fatalf("ERROR: cannot list pool assignments: %s", err)
			}

			columns = append(columns, strings.Join([]string{
				env,
				pool,
				strings.Join(assigments, ",")}, " | "))
		}

	}
	output := columnize.SimpleFormat(columns)
	log.Println(output)
}

// Backup app config to a file or STDOUT
func appBackup(c *cli.Context) {
	initStore(c)

	env := utils.GalaxyEnv(c)
	if env == "" {
		log.Fatal("ERROR: env is required.  Pass --env or set GALAXY_ENV")
	}

	backup := &backupData{
		Time: time.Now(),
	}

	toBackup := c.Args()

	if len(toBackup) == 0 {
		appList, err := configStore.ListApps(env)
		if err != nil {
			log.Fatalf("ERROR: %s\n", err)
		}

		for _, app := range appList {
			toBackup = append(toBackup, app.Name())
		}
	}

	errCount := 0
	for _, app := range toBackup {
		data, err := getAppBackup(app, env)
		if err != nil {
			// log errors and continue
			log.Errorf("ERROR: %s [%s]", err, app)
			errCount++
			continue
		}
		backup.Apps = append(backup.Apps, data)
	}

	if errCount > 0 {
		fmt.Printf("WARNING: backup completed with %d errors\n", errCount)
		defer os.Exit(errCount)
	}

	j, err := json.MarshalIndent(backup, "", "  ")
	if err != nil {
		log.Fatal(err)
	}

	fileName := c.String("file")
	if fileName != "" {
		if err := ioutil.WriteFile(fileName, j, 0666); err != nil {
			log.Fatal(err)
		}
		return
	}

	os.Stdout.Write(j)
}

func pgPsql(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	app := ensureAppParam(c, "pg:psql")

	appCfg, err := configStore.GetApp(app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: Unable to run command: %s.", err)
		return
	}

	database_url := appCfg.Env()["DATABASE_URL"]
	if database_url == "" {
		log.Printf("No DATABASE_URL configured.  Set one with config:set first.")
		return
	}

	if !strings.HasPrefix(database_url, "postgres://") {
		log.Printf("DATABASE_URL is not a postgres database.")
		return
	}

	cmd := exec.Command("psql", database_url)

	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr

	// Ignore SIGINT while the process is running
	ch := make(chan os.Signal, 1)
	signal.Notify(ch, os.Interrupt)

	defer func() {
		signal.Stop(ch)
		close(ch)
	}()

	go func() {
		for {
			_, ok := <-ch
			if !ok {
				break
			}
		}
	}()

	err = cmd.Start()
	if err != nil {
		log.Fatal(err)
	}

	err = cmd.Wait()
	if err != nil {
		fmt.Printf("Command finished with error: %v\n", err)
	}
}

func appRestart(c *cli.Context) {
	initStore(c)

	app := ensureAppParam(c, "app:restart")

	err := commander.AppRestart(configStore, app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func appDelete(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)

	app := ensureAppParam(c, "app:delete")

	err := commander.AppDelete(configStore, app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func configList(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	app := ensureAppParam(c, "config")

	err := commander.ConfigList(configStore, app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: Unable to list config: %s.", err)
		return
	}
}

func configUnset(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	app := ensureAppParam(c, "config:unset")

	err := commander.ConfigUnset(configStore, app, utils.GalaxyEnv(c), c.Args().Tail())
	if err != nil {
		log.Fatalf("ERROR: Unable to unset config: %s.", err)
		return
	}
}

func poolAssign(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)
	initStore(c)

	app := ensureAppParam(c, "pool:assign")

	err := commander.AppAssign(configStore, app, utils.GalaxyEnv(c), utils.GalaxyPool(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func appShell(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	initRuntime(c)

	app := ensureAppParam(c, "app:shell")

	err := commander.AppShell(configStore, serviceRuntime, app,
		utils.GalaxyEnv(c), utils.GalaxyPool(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func appCreate(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)

	app := c.Args().First()
	if app == "" {
		cli.ShowCommandHelp(c, "app:create")
		log.Fatal("ERROR: app name missing")
	}

	err := commander.AppCreate(configStore, app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func stackDeletePool(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)

	if c.String("region") != "" {
		stack.Region = c.String("region")
	}

	baseStack := getBase(c)

	stackName := fmt.Sprintf("%s-%s-%s", baseStack,
		utils.GalaxyEnv(c),
		utils.GalaxyPool(c))

	waitAndDelete(stackName)
}

func poolCreate(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)
	initStore(c)
	created, err := configStore.CreatePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: Could not create pool: %s", err)
		return
	}

	if created {
		log.Printf("Pool %s created\n", utils.GalaxyPool(c))
	} else {
		log.Printf("Pool %s already exists\n", utils.GalaxyPool(c))
	}
}

func poolUnassign(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)
	initStore(c)

	app := c.Args().First()
	if app == "" {
		cli.ShowCommandHelp(c, "pool:assign")
		log.Fatal("ERROR: app name missing")
	}

	err := commander.AppUnassign(configStore, app, utils.GalaxyEnv(c), utils.GalaxyPool(c))
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func poolDelete(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)
	initStore(c)
	empty, err := configStore.DeletePool(utils.GalaxyPool(c), utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: Could not delete pool: %s", err)
		return
	}

	if empty {
		log.Printf("Pool %s deleted\n", utils.GalaxyPool(c))

	} else {
		log.Printf("Pool %s has apps assigned. Unassign them first.\n", utils.GalaxyPool(c))
	}
}

func appRun(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	initRuntime(c)

	app := ensureAppParam(c, "app:run")

	if len(c.Args()) < 2 {
		log.Fatalf("ERROR: Missing command to run.")
		return
	}

	err := commander.AppRun(configStore, serviceRuntime, app, utils.GalaxyEnv(c), c.Args()[1:])
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

func ensureAppParam(c *cli.Context, command string) string {
	app := c.Args().First()
	if app == "" {
		cli.ShowCommandHelp(c, command)
		log.Fatal("ERROR: app name missing")
	}

	exists, err := appExists(app, utils.GalaxyEnv(c))
	if err != nil {
		log.Fatalf("ERROR: can't deteremine if %s exists: %s", app, err)
	}

	if !exists {
		log.Fatalf("ERROR: %s does not exist. Create it first.", app)
	}

	return app
}

func appDeploy(c *cli.Context) {
	ensureEnvArg(c)
	initStore(c)
	initRuntime(c)

	app := ensureAppParam(c, "app:deploy")

	version := ""
	if len(c.Args().Tail()) == 1 {
		version = c.Args().Tail()[0]
	}

	if version == "" {
		log.Println("ERROR: version missing")
		cli.ShowCommandHelp(c, "app:deploy")
		return
	}

	err := commander.AppDeploy(configStore, serviceRuntime, app, utils.GalaxyEnv(c), version)
	if err != nil {
		log.Fatalf("ERROR: %s", err)
	}
}

// Update an existing Pool Stack
func stackUpdatePool(c *cli.Context) {
	ensureEnvArg(c)
	ensurePoolArg(c)

	if c.String("region") != "" {
		stack.Region = c.String("region")
	}

	poolName := utils.GalaxyPool(c)
	baseStack := getBase(c)
	poolEnv := utils.GalaxyEnv(c)

	stackName := fmt.Sprintf("%s-%s-%s", baseStack, poolEnv, poolName)

	pool, err := stack.GetPool(stackName)
	if err != nil {
		log.Fatal(err)
	}

	options := make(map[string]string)
	if policy := c.String("policy"); policy != "" {
		policyJSON, err := jsonFromArg(policy)
		if err != nil {
			log.Fatal("policy error:", err)
		}

		options["StackPolicyDuringUpdateBody"] = string(policyJSON)
	}

	resources := sharedResources(c, baseStack)

	asg := pool.ASG()
	if asg == nil {
		log.Fatal("missing ASG")
	}

	if c.Int("desired-size") > 0 {
		asg.Properties.DesiredCapacity = c.Int("desired-size")
	}

	if c.Int("min-size") > 0 {
		asg.Properties.MinSize = c.Int("min-size")
	}

	if c.Int("max-size") > 0 {
		asg.Properties.MaxSize = c.Int("max-size")
	}

	if c.Bool("auto-update") {
		// note that the max pause is only PT5M30S
		asg.SetASGUpdatePolicy(c.Int("update-min"), c.Int("update-batch"), c.Duration("update-pause"))
	}

	numZones := c.Int("availability-zones")
	if numZones == 0 {
		numZones = len(asg.Properties.VPCZoneIdentifier)
	}

	// start with the current settings
	subnetIDs := []string{}
	azIDs := []string{}

	// only update the subnets/AZs if we changed the count
	if len(asg.Properties.VPCZoneIdentifier) != numZones {
		subnets := resources.Subnets
		if numZones <= len(subnets) {
			subnets = subnets[:numZones]
		} else {
			log.Fatal("ERROR: cannot run in %d zones, only %d available.", numZones, len(subnets))
		}

		for _, sn := range subnets {
			subnetIDs = append(subnetIDs, sn.ID)
			azIDs = append(azIDs, sn.AvailabilityZone)
		}
		asg.Properties.VPCZoneIdentifier = subnetIDs
		asg.Properties.AvailabilityZones = azIDs

	}

	elb := pool.ELB()

	sslCert := ""
	if cert := c.String("ssl-cert"); cert != "" {
		sslCert = resources.ServerCerts[cert]
		if sslCert == "" {
			log.Fatalf("Could not find certificate '%s'", cert)
		}
	}

	httpPort := c.Int("http-port")

	if (sslCert != "" || httpPort > 0) && elb == nil {
		log.Fatal("ERROR: Pool does not have an ELB")
	}

	// we can set the default now that we've verified that elb can be nil
	if httpPort == 0 {
		httpPort = 80
//.........这里部分代码省略.........