Golang console.Fatalf函數代碼示例

// 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)
	}
}

// runListCmd - is a handler for mc ls command
func runListCmd(ctx *cli.Context) {
	args := ctx.Args()
	if globalAliasFlag {
		if !ctx.Args().Present() {
			args = []string{"."}
		}
	} else if !ctx.Args().Present() || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "ls", 1) // last argument is exit code
	}

	config := mustGetMcConfig()
	for _, arg := range 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)
			}
		}
		// if recursive strip off the "..."
		newTargetURL := stripRecursiveURL(targetURL)
		err = doListCmd(newTargetURL, isURLRecursive(targetURL))
		if err != nil {
			console.Fatalf("Failed to list : %s. %s\n", targetURL, err)
		}
	}
}

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)
	}
}

// checkCopySyntaxTypeB verifies if the source is a valid file and target is a valid dir.
func checkCopySyntaxTypeB(srcURLs []string, tgtURL string) {
	if len(srcURLs) != 1 {
		console.Fatalf("Invalid number of source arguments to copy command. %s\n", NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}
	srcURL := srcURLs[0]
	_, 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.IsDir() {
		console.Fatalf("Source ‘%s’ is a folder. Use ‘%s...’ argument to copy this folder and its contents recursively. %s\n", srcURL, srcURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}
	if !srcContent.Type.IsRegular() {
		console.Fatalf("Source ‘%s’ is not a file. %s\n", srcURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}

	_, tgtContent, err := url2Stat(tgtURL)
	// Target exist?.
	if err == nil {
		if !tgtContent.Type.IsDir() {
			console.Fatalf("Target ‘%s’ is not a folder. %s\n", tgtURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
		}
	}
}

func runCastCmd(ctx *cli.Context) {
	checkCastSyntax(ctx)

	session := newSessionV2()

	var err error
	session.Header.CommandType = "cast"
	session.Header.RootPath, err = os.Getwd()
	if err != nil {
		session.Close()
		session.Delete()
		console.Fatalf("Unable to get current working folder. %s\n", err)
	}

	// extract URLs.
	session.Header.CommandArgs, err = args2URLs(ctx.Args())
	if err != nil {
		session.Close()
		session.Delete()
		console.Fatalf("One or more unknown URL types found in %s. %s\n", ctx.Args(), err)
	}

	doCastCmdSession(session)
	session.Close()
	session.Delete()
}

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)
		}
	}
}

// Check for the environment early on and gracefully report.
func checkConfig() {
	_, err := user.Current()
	if err != nil {
		console.Fatalf("Unable to determine current user. %s\n", err)
	}

	// Ensures config file is sane
	_, err = getMcConfig()
	if err != nil {
		console.Fatalf("Unable to read config file. %s\n", err)
	}

}

// mustGetHostConfig retrieves host specific configuration such as access keys, exits upon error
func mustGetHostConfig(URL string) *hostConfig {
	hostCfg, err := getHostConfig(URL)
	if err != nil {
		console.Fatalf("Unable to retrieve host configuration. %s\n", NewIodine(iodine.New(err, nil)))
	}
	return hostCfg
}

// loadSession - reads session file if exists and re-initiates internal variables
func loadSessionV2(sid string) (*sessionV2, error) {
	if !isSessionDirExists() {
		return nil, NewIodine(iodine.New(errInvalidArgument{}, nil))
	}
	sessionFile := getSessionFile(sid)

	_, err := os.Stat(sessionFile)
	if err != nil {
		return nil, NewIodine(iodine.New(err, nil))
	}

	s := &sessionV2{}
	s.Header = &sessionV2Header{}
	s.SessionID = sid
	s.Header.Version = "1.1.0"
	qs, err := quick.New(s.Header)
	if err != nil {
		return nil, NewIodine(iodine.New(err, nil))
	}
	err = qs.Load(sessionFile)
	if err != nil {
		return nil, NewIodine(iodine.New(err, nil))
	}

	s.mutex = new(sync.Mutex)
	s.Header = qs.Data().(*sessionV2Header)

	s.DataFP, err = os.Open(getSessionDataFile(s.SessionID))
	if err != nil {
		console.Fatalf("Unable to open session data file \""+getSessionDataFile(s.SessionID)+"\". %s", NewIodine(iodine.New(errNotConfigured{}, nil)))
	}

	return s, nil
}

// mustGetMcConfigDir - construct minio client config folder or fail
func mustGetMcConfigDir() (configDir string) {
	configDir, err := getMcConfigDir()
	if err != nil {
		console.Fatalf("Unable to determine default configuration folder. %s\n", NewIodine(iodine.New(err, nil)))
	}
	return configDir
}

// mustGetMcConfigPath - similar to getMcConfigPath, ignores errors
func mustGetMcConfigPath() string {
	p, err := getMcConfigPath()
	if err != nil {
		console.Fatalf("Unable to determine default config path. %s\n", NewIodine(iodine.New(err, nil)))
	}
	return p
}

// mustNewConfig instantiates a new config handler, exists upon error
func mustNewConfig() quick.Config {
	config, err := newConfig()
	if err != nil {
		console.Fatalf("Unable to instantiate a new config handler. %s\n", NewIodine(iodine.New(err, nil)))
	}
	return config
}

// mustGetMcConfig - reads configuration file and returns configs, exits on error
func mustGetMcConfig() *configV1 {
	config, err := getMcConfig()
	if err != nil {
		console.Fatalf("Unable to retrieve mc configuration. %s\n", err)
	}
	return config
}

//   NOTE: All the parse rules should reduced to A: Copy(Source, Target).
//
//   * VALID RULES
//   =======================
//   A: copy(f, f) -> copy(f, f)
//   B: copy(f, d) -> copy(f, d/f) -> A
//   C: copy(d1..., d2) -> []copy(d1/f, d1/d2/f) -> []A
//
//   * INVALID RULES
//   =========================
//   A: copy(d, *)
//   B: copy(d..., f)
//   C: copy(*, d...)
//
func checkCopySyntax(ctx *cli.Context) {
	if len(ctx.Args()) < 2 || ctx.Args().First() == "help" {
		cli.ShowCommandHelpAndExit(ctx, "cp", 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))
	}

	srcURLs := URLs[:len(URLs)-1]
	tgtURL := URLs[len(URLs)-1]

	/****** Generic rules *******/
	// Recursive URLs are not allowed in target.
	if isURLRecursive(tgtURL) {
		console.Fatalf("Target ‘%s’ cannot be recursive. %s\n", tgtURL, iodine.New(err, nil))
	}

	switch guessCopyURLType(srcURLs, tgtURL) {
	case copyURLsTypeA: // Source is already a regular file.
		// no verification needed, pass through
	case copyURLsTypeB: // Source is already a regular file.
		// no verification needed, pass through
	case copyURLsTypeC:
		for _, srcURL := range srcURLs {
			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))
			}
		}
	case copyURLsTypeD:
		// only verify if target is a valid directory and exists
		if !isTargetURLDir(tgtURL) {
			console.Fatalf("Target ‘%s’ should be a directory and exist, when we have a mixture of files and folders in source\n", tgtURL)
		}
	default:
		console.Fatalln("Invalid arguments. Unable to determine how to copy. Please report this issue at https://github.com/minio/mc/issues")
	}
}

func checkCastSyntaxTypeB(srcURL string, tgtURLs []string) {
	if len(tgtURLs) == 0 && tgtURLs == nil {
		console.Fatalf("Invalid number of target arguments to cast command. %s\n", NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}
	_, 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.IsDir() {
		console.Fatalf("Source ‘%s’ is a folder. Use ‘%s...’ argument to cast this folder and its contents recursively. %s\n", srcURL, srcURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}
	if !srcContent.Type.IsRegular() {
		console.Fatalf("Source ‘%s’ is not a file. %s\n", srcURL, NewIodine(iodine.New(errInvalidArgument{}, nil)))
	}
	// targetURL can be folder or file, internally TypeB calls TypeA if it finds a file
}