Example #1
0
func main() {
	cfg := config{
		Years:        10,
		Organization: "gencerts",
	}
	parser := flags.NewParser(&cfg, flags.Default)
	_, err := parser.Parse()
	if err != nil {
		if e, ok := err.(*flags.Error); !ok || e.Type != flags.ErrHelp {
			parser.WriteHelp(os.Stderr)
		}
		return
	}

	if cfg.Directory == "" {
		var err error
		cfg.Directory, err = os.Getwd()
		if err != nil {
			fmt.Fprintf(os.Stderr, "no directory specified and cannot get working directory\n")
			os.Exit(1)
		}
	}
	cfg.Directory = cleanAndExpandPath(cfg.Directory)
	certFile := filepath.Join(cfg.Directory, "rpc.cert")
	keyFile := filepath.Join(cfg.Directory, "rpc.key")

	if !cfg.Force {
		if fileExists(certFile) || fileExists(keyFile) {
			fmt.Fprintf(os.Stderr, "%v: certificate and/or key files exist; use -f to force\n", cfg.Directory)
			os.Exit(1)
		}
	}

	validUntil := time.Now().Add(time.Duration(cfg.Years) * 365 * 24 * time.Hour)
	cert, key, err := btcutil.NewTLSCertPair(cfg.Organization, validUntil, cfg.ExtraHosts)
	if err != nil {
		fmt.Fprintf(os.Stderr, "cannot generate certificate pair: %v\n", err)
		os.Exit(1)
	}

	// Write cert and key files.
	if err = ioutil.WriteFile(certFile, cert, 0666); err != nil {
		fmt.Fprintf(os.Stderr, "cannot write cert: %v\n", err)
		os.Exit(1)
	}
	if err = ioutil.WriteFile(keyFile, key, 0600); err != nil {
		os.Remove(certFile)
		fmt.Fprintf(os.Stderr, "cannot write key: %v\n", err)
		os.Exit(1)
	}
}
Example #2
0
// loadConfig initializes and parses the config using command line options.
func loadConfig() (*config, []string, error) {
	// Default config.
	cfg := config{
		DataDir:  defaultDataDir,
		DbType:   defaultDbType,
		InFile:   defaultDataFile,
		Progress: defaultProgress,
	}

	// Parse command line options.
	parser := flags.NewParser(&cfg, flags.Default)
	remainingArgs, err := parser.Parse()
	if err != nil {
		if e, ok := err.(*flags.Error); !ok || e.Type != flags.ErrHelp {
			parser.WriteHelp(os.Stderr)
		}
		return nil, nil, err
	}

	// Multiple networks can't be selected simultaneously.
	funcName := "loadConfig"
	numNets := 0
	// Count number of network flags passed; assign active network params
	// while we're at it
	if cfg.TestNet3 {
		numNets++
		activeNetParams = &btcnet.TestNet3Params
	}
	if cfg.RegressionTest {
		numNets++
		activeNetParams = &btcnet.RegressionNetParams
	}
	if cfg.SimNet {
		numNets++
		activeNetParams = &btcnet.SimNetParams
	}
	if numNets > 1 {
		str := "%s: The testnet, regtest, and simnet params can't be " +
			"used together -- choose one of the three"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		parser.WriteHelp(os.Stderr)
		return nil, nil, err
	}

	// Validate database type.
	if !validDbType(cfg.DbType) {
		str := "%s: The specified database type [%v] is invalid -- " +
			"supported types %v"
		err := fmt.Errorf(str, "loadConfig", cfg.DbType, knownDbTypes)
		fmt.Fprintln(os.Stderr, err)
		parser.WriteHelp(os.Stderr)
		return nil, nil, err
	}

	// Append the network type to the data directory so it is "namespaced"
	// per network.  In addition to the block database, there are other
	// pieces of data that are saved to disk such as address manager state.
	// All data is specific to a network, so namespacing the data directory
	// means each individual piece of serialized data does not have to
	// worry about changing names per network and such.
	cfg.DataDir = filepath.Join(cfg.DataDir, netName(activeNetParams))

	// Ensure the specified block file exists.
	if !fileExists(cfg.InFile) {
		str := "%s: The specified block file [%v] does not exist"
		err := fmt.Errorf(str, "loadConfig", cfg.InFile)
		fmt.Fprintln(os.Stderr, err)
		parser.WriteHelp(os.Stderr)
		return nil, nil, err
	}

	return &cfg, remainingArgs, nil
}
Example #3
0
// loadConfig initializes and parses the config using a config file and command
// line options.
//
// The configuration proceeds as follows:
// 	1) Start with a default config with sane settings
// 	2) Pre-parse the command line to check for an alternative config file
// 	3) Load configuration file overwriting defaults with any specified options
// 	4) Parse CLI options and overwrite/add any specified options
//
// The above results in functioning properly without any config settings
// while still allowing the user to override settings with config files and
// command line options.  Command line options always take precedence.
func loadConfig() (*flags.Parser, *config, []string, error) {
	// Default config.
	cfg := config{
		ConfigFile: defaultConfigFile,
		RPCServer:  defaultRPCServer,
		RPCCert:    defaultRPCCertFile,
	}

	// Create the home directory if it doesn't already exist.
	err := os.MkdirAll(btcdHomeDir, 0700)
	if err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		os.Exit(-1)
	}

	// Pre-parse the command line options to see if an alternative config
	// file or the version flag was specified.  Any errors can be ignored
	// here since they will be caught be the final parse below.
	preCfg := cfg
	preParser := flags.NewParser(&preCfg, flags.None)
	preParser.Parse()

	// Show the version and exit if the version flag was specified.
	if preCfg.ShowVersion {
		appName := filepath.Base(os.Args[0])
		appName = strings.TrimSuffix(appName, filepath.Ext(appName))
		fmt.Println(appName, "version", version())
		os.Exit(0)
	}

	// Load additional config from file.
	parser := flags.NewParser(&cfg, flags.PassDoubleDash|flags.HelpFlag)
	err = flags.NewIniParser(parser).ParseFile(preCfg.ConfigFile)
	if err != nil {
		if _, ok := err.(*os.PathError); !ok {
			fmt.Fprintln(os.Stderr, err)
			return parser, nil, nil, err
		}
	}

	// Parse command line options again to ensure they take precedence.
	remainingArgs, err := parser.Parse()
	if err != nil {
		return parser, nil, nil, err
	}

	// Multiple networks can't be selected simultaneously.
	numNets := 0
	if cfg.TestNet3 {
		numNets++
	}
	if cfg.SimNet {
		numNets++
	}
	if numNets > 1 {
		str := "%s: The testnet and simnet params can't be used " +
			"together -- choose one of the two"
		err := fmt.Errorf(str, "loadConfig")
		fmt.Fprintln(os.Stderr, err)
		return parser, nil, nil, err
	}

	// Override the RPC certificate if the --wallet flag was specified and
	// the user did not specify one.
	if cfg.Wallet && cfg.RPCCert == defaultRPCCertFile {
		cfg.RPCCert = defaultWalletCertFile
	}

	// Handle environment variable expansion in the RPC certificate path.
	cfg.RPCCert = cleanAndExpandPath(cfg.RPCCert)

	// Add default port to RPC server based on --testnet and --wallet flags
	// if needed.
	cfg.RPCServer = normalizeAddress(cfg.RPCServer, cfg.TestNet3,
		cfg.SimNet, cfg.Wallet)

	return parser, &cfg, remainingArgs, nil
}