Golang console.Fatalln函數代碼示例

func migrateConfigV1ToV101() {
	if !isMcConfigExists() {
		return
	}
	conf := newConfigV1()
	config, err := quick.New(conf)
	if err != nil {
		console.Fatalln(NewIodine(iodine.New(err, nil)))
	}
	config.Load(mustGetMcConfigPath())
	conf = config.Data().(*configV1)
	// version is the same return
	if conf.Version == mcCurrentConfigVersion {
		return
	}
	conf.Version = mcCurrentConfigVersion

	localHostConfig := new(hostConfig)
	localHostConfig.AccessKeyID = ""
	localHostConfig.SecretAccessKey = ""

	if _, ok := conf.Hosts["localhost:*"]; !ok {
		conf.Hosts["localhost:*"] = localHostConfig
	}
	if _, ok := conf.Hosts["127.0.0.1:*"]; !ok {
		conf.Hosts["127.0.0.1:*"] = localHostConfig
	}

	newConfig, err := quick.New(conf)
	if err := newConfig.Save(mustGetMcConfigPath()); err != nil {
		console.Fatalln(NewIodine(iodine.New(err, nil)))
	}
	console.Infof("Successfully migrated %s from version: %s to version: %s\n", mustGetMcConfigPath(), mcPreviousConfigVersion, mcCurrentConfigVersion)
}

// fatalIf wrapper function which takes error and selectively prints stack frames if available on debug
func fatalIf(err *probe.Error, msg string) {
	if err == nil {
		return
	}
	if globalJSON {
		errorMsg := errorMessage{
			Message: msg,
			Type:    "fatal",
			Cause: causeMessage{
				Message: err.ToGoError().Error(),
				Error:   err.ToGoError(),
			},
			SysInfo: err.SysInfo,
		}
		if globalDebug {
			errorMsg.CallTrace = err.CallTrace
		}
		json, err := json.Marshal(struct {
			Status string       `json:"status"`
			Error  errorMessage `json:"error"`
		}{
			Status: "error",
			Error:  errorMsg,
		})
		if err != nil {
			console.Fatalln(probe.NewError(err))
		}
		console.Println(string(json))
		console.Fatalln()
	}
	if !globalDebug {
		console.Fatalln(fmt.Sprintf("%s %s", msg, err.ToGoError()))
	}
	console.Fatalln(fmt.Sprintf("%s %s", msg, err))
}

// fatalIf wrapper function which takes error and selectively prints stack frames if available on debug
func fatalIf(err *probe.Error, msg string) {
	if err == nil {
		return
	}
	if globalJSONFlag {
		errorMessage := ErrorMessage{
			Message: msg,
			Type:    "fatal",
			Cause:   err.ToGoError(),
			SysInfo: err.SysInfo,
		}
		if globalDebugFlag {
			errorMessage.CallTrace = err.CallTrace
		}
		json, err := json.Marshal(struct {
			Error ErrorMessage `json:"error"`
		}{
			Error: errorMessage,
		})
		if err != nil {
			console.Fatalln(probe.NewError(err))
		}
		console.Println(string(json))
		os.Exit(1)
	}
	if !globalDebugFlag {
		console.Fatalln(fmt.Sprintf("%s %s", msg, err.ToGoError()))
	}
	console.Fatalln(fmt.Sprintf("%s %s", msg, err))
}

// check if minimum Go version is met.
func checkGoVersion() {
	runtimeVersion := runtime.Version()

	// Checking version is always successful with go tip
	if strings.HasPrefix(runtimeVersion, "devel") {
		return
	}

	// Parsing golang version
	curVersion, e := version.NewVersion(runtimeVersion[2:])
	if e != nil {
		console.Fatalln("Unable to determine current go version.", e)
	}

	// Prepare version constraint.
	constraints, e := version.NewConstraint(minGoVersion)
	if e != nil {
		console.Fatalln("Unable to check go version.")
	}

	// Check for minimum version.
	if !constraints.Check(curVersion) {
		console.Fatalln(fmt.Sprintf("Please recompile Minio with Golang version %s.", minGoVersion))
	}
}

// runMakeBucketCmd is the handler for mc mb command
func runMakeBucketCmd(ctx *cli.Context) {
	if !ctx.Args().Present() || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "mb", 1) // last argument is exit code
	}
	if !isMcConfigExists() {
		console.Fatalf("Please run \"mc config generate\". %s\n", errNotConfigured{})
	}
	config := mustGetMcConfig()
	for _, arg := range ctx.Args() {
		targetURL, err := getExpandedURL(arg, config.Aliases)
		if err != nil {
			switch e := iodine.ToError(err).(type) {
			case errUnsupportedScheme:
				console.Fatalf("Unknown type of URL %s. %s\n", e.url, err)
			default:
				console.Fatalf("Unable to parse argument %s. %s\n", arg, err)
			}
		}
		msg, err := doMakeBucketCmd(targetURL)
		if err != nil {
			console.Fatalln(msg)
		}
		console.Infoln(msg)
	}
}

func registerApp() *cli.App {
	// Register all commands.
	registerCommand(serverCmd)
	registerCommand(versionCmd)
	registerCommand(updateCmd)
	registerCommand(controlCmd)

	// Set up app.
	app := cli.NewApp()
	app.Name = "Minio"
	app.Author = "Minio.io"
	app.Usage = "Cloud Storage Server."
	app.Description = `Minio is an Amazon S3 compatible object storage server. Use it to store photos, videos, VMs, containers, log files, or any blob of data as objects.`
	app.Flags = globalFlags
	app.Commands = commands
	app.CustomAppHelpTemplate = minioHelpTemplate
	app.CommandNotFound = func(ctx *cli.Context, command string) {
		msg := fmt.Sprintf("‘%s’ is not a minio sub-command. See ‘minio --help’.", command)
		closestCommands := findClosestCommands(command)
		if len(closestCommands) > 0 {
			msg += fmt.Sprintf("\n\nDid you mean one of these?\n")
			for _, cmd := range closestCommands {
				msg += fmt.Sprintf("        ‘%s’\n", cmd)
			}
		}
		console.Fatalln(msg)
	}
	return app
}

func runCatCmd(ctx *cli.Context) {
	if !ctx.Args().Present() || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "cat", 1) // last argument is exit code
	}
	if !isMcConfigExists() {
		console.Fatalf("Please run \"mc config generate\". %s\n", errNotConfigured{})
	}
	config := mustGetMcConfig()
	// Convert arguments to URLs: expand alias, fix format...
	for _, arg := range ctx.Args() {
		sourceURL, err := getExpandedURL(arg, config.Aliases)
		if err != nil {
			switch e := iodine.ToError(err).(type) {
			case errUnsupportedScheme:
				console.Fatalf("Unknown type of URL %s. %s\n", e.url, err)
			default:
				console.Fatalf("Unable to parse argument %s. %s\n", arg, err)
			}
		}
		errorMsg, err := doCatCmd(sourceURL)
		if err != nil {
			console.Fatalln(errorMsg)
		}
	}
}

func runAccessCmd(ctx *cli.Context) {
	if !ctx.Args().Present() || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "access", 1) // last argument is exit code
	}
	config := mustGetMcConfig()
	acl := bucketACL(ctx.Args().First())
	if !acl.isValidBucketACL() {
		console.Fatalf("Valid types are [private, public, readonly]. %s\n", errInvalidACL{acl: acl.String()})
	}
	for _, arg := range ctx.Args().Tail() {
		targetURL, err := getExpandedURL(arg, config.Aliases)
		if err != nil {
			switch e := iodine.ToError(err).(type) {
			case errUnsupportedScheme:
				console.Fatalf("Unknown type of URL %s. %s\n", e.url, err)
			default:
				console.Fatalf("Unable to parse argument %s. %s\n", arg, err)
			}
		}
		msg, err := doUpdateAccessCmd(targetURL, acl)
		if err != nil {
			console.Fatalln(msg)
		}
		console.Infoln(msg)
	}
}

// checkCastSyntax(URLs []string)
func checkCastSyntax(ctx *cli.Context) {
	if len(ctx.Args()) < 2 || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "cast", 1) // last argument is exit code.
	}
	// extract URLs.
	URLs, err := args2URLs(ctx.Args())
	if err != nil {
		console.Fatalf("One or more unknown URL types found %s. %s\n", ctx.Args(), NewIodine(iodine.New(err, nil)))
	}

	srcURL := URLs[0]
	tgtURLs := URLs[1:]

	/****** Generic rules *******/
	// Source cannot be a folder (except when recursive)
	if !isURLRecursive(srcURL) {
		_, srcContent, err := url2Stat(srcURL)
		// Source exist?.
		if err != nil {
			console.Fatalf("Unable to stat source ‘%s’. %s\n", srcURL, NewIodine(iodine.New(err, nil)))
		}
		if !srcContent.Type.IsRegular() {
			if srcContent.Type.IsDir() {
				console.Fatalf("Source ‘%s’ is a folder. Please use ‘%s...’ to recursively copy this folder and its contents.\n", srcURL, srcURL)
			}
			console.Fatalf("Source ‘%s’ is not a regular file.\n", srcURL)
		}
	}
	// Recursive URLs are not allowed in target.
	for _, tgtURL := range tgtURLs {
		if isURLRecursive(tgtURL) {
			console.Fatalf("Target ‘%s’ cannot be recursive. %s\n", tgtURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
		}
	}

	for _, tgtURL := range tgtURLs {
		url, err := client.Parse(tgtURL)
		if err != nil {
			console.Fatalf("Unable to parse target ‘%s’ argument. %s\n", tgtURL, NewIodine(iodine.New(err, nil)))
		}
		if url.Host != "" {
			if url.Path == string(url.Separator) {
				console.Fatalf("Bucket creation detected for %s, cloud storage URL's should use ‘mc mb’ to create buckets\n", tgtURL)
			}
		}
	}

	switch guessCastURLType(srcURL, tgtURLs) {
	case castURLsTypeA: // File -> File.
		checkCastSyntaxTypeA(srcURL, tgtURLs)
	case castURLsTypeB: // File -> Folder.
		checkCastSyntaxTypeB(srcURL, tgtURLs)
	case castURLsTypeC: // Folder -> Folder.
		checkCastSyntaxTypeC(srcURL, tgtURLs)
	default:
		console.Fatalln("Invalid arguments. Unable to determine how to cast. Please report this issue at https://github.com/minio/mc/issues")
	}
}

// check if minimum Go version is met.
func checkGoVersion() {
	// Current version.
	curVersion, e := version.NewVersion(runtime.Version()[2:])
	if e != nil {
		console.Fatalln("Unable to determine current go version.", e)
	}

	// Prepare version constraint.
	constraints, e := version.NewConstraint(minGoVersion)
	if e != nil {
		console.Fatalln("Unable to check go version.")
	}

	// Check for minimum version.
	if !constraints.Check(curVersion) {
		console.Fatalln(fmt.Sprintf("Please recompile Minio with Golang version %s.", minGoVersion))
	}
}

// Verify main command syntax.
func checkMainSyntax(c *cli.Context) {
	configPath, err := getConfigPath()
	if err != nil {
		console.Fatalf("Unable to obtain user's home directory. \nError: %s\n", err)
	}
	if configPath == "" {
		console.Fatalln("Config folder cannot be empty, please specify --config-dir <foldername>.")
	}
}

// checkCastSyntax(URLs []string)
func checkCastSyntax(ctx *cli.Context) {
	if len(ctx.Args()) < 2 || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "cast", 1) // last argument is exit code.
	}

	// extract URLs.
	URLs, err := args2URLs(ctx.Args())
	if err != nil {
		console.Fatalf("One or more unknown URL types found %s. %s\n", ctx.Args(), iodine.New(err, nil))
	}

	srcURL := URLs[0]
	tgtURLs := URLs[1:]

	/****** Generic rules *******/
	// Source cannot be a directory (except when recursive)
	if !isURLRecursive(srcURL) {
		_, srcContent, err := url2Stat(srcURL)
		// Source exist?.
		if err != nil {
			console.Fatalf("Unable to stat source ‘%s’. %s\n", srcURL, iodine.New(err, nil))
		}
		if !srcContent.Type.IsRegular() {
			if srcContent.Type.IsDir() {
				console.Fatalf("Source ‘%s’ is a directory. Please use ‘%s...’ to recursively copy this directory and its contents.\n", srcURL, srcURL)
			}
			console.Fatalf("Source ‘%s’ is not a regular file.\n", srcURL)
		}
	}
	// Recursive URLs are not allowed in target.
	for _, tgtURL := range tgtURLs {
		if isURLRecursive(tgtURL) {
			console.Fatalf("Target ‘%s’ cannot be recursive. %s\n", tgtURL, iodine.New(err, nil))
		}
	}

	switch guessCastURLType(srcURL, tgtURLs) {
	case castURLsTypeA: // Source is already a regular file.
		//
	case castURLsTypeB: // Source is already a regular file.
		//
	case castURLsTypeC:
		srcURL = stripRecursiveURL(srcURL)
		_, srcContent, err := url2Stat(srcURL)
		// Source exist?.
		if err != nil {
			console.Fatalf("Unable to stat source ‘%s’. %s\n", srcURL, iodine.New(err, nil))
		}

		if srcContent.Type.IsRegular() { // Ellipses is supported only for directories.
			console.Fatalf("Source ‘%s’ is not a directory. %s\n", stripRecursiveURL(srcURL), iodine.New(err, nil))
		}

	default:
		console.Fatalln("Invalid arguments. Unable to determine how to cast. Please report this issue at https://github.com/minio/mc/issues")
	}
}

// runUpdateCmd -
func runUpdateCmd(ctx *cli.Context) {
	if ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "update", 1) // last argument is exit code
	}
	msg, err := doUpdateCheck()
	if err != nil {
		console.Fatalln(msg)
	}
	// no msg do not print one
	if msg != "" {
		console.Infoln(msg)
	}
}

func firstTimeRun() {
	if !isMcConfigExists() {
		if err := createMcConfigDir(); err != nil {
			console.Fatalf("Unable to create ‘mc’ config folder. %s\n", err)
		}
		config, err := newConfig()
		if err != nil {
			console.Fatalln(NewIodine(iodine.New(err, nil)))
		}
		err = writeConfig(config)
		if err != nil {
			console.Fatalln(NewIodine(iodine.New(err, nil)))
		}
		console.Infoln("Configuration written to [" + mustGetMcConfigPath() + "]. Please update your access credentials.")
	}
	if !isSessionDirExists() {
		if err := createSessionDir(); err != nil {
			console.Fatalf("Unable to create ‘mc’ session folder. %s\n", err)
		}
	}
	checkGolangVersion()
}

// runUpdateCmd -
func runUpdateCmd(ctx *cli.Context) {
	if ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "update", 1) // last argument is exit code
	}
	if !isMcConfigExists() {
		console.Fatalf("Please run \"mc config generate\". %s\n", NewIodine(iodine.New(errNotConfigured{}, nil)))
	}
	msg, err := doUpdateCheck()
	if err != nil {
		console.Fatalln(msg)
	}
	// no msg do not print one
	if msg != "" {
		console.Infoln(msg)
	}
}