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137 lines
2.7 KiB
137 lines
2.7 KiB
package config
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import (
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"path/filepath"
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"strings"
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//"crypto/rand"
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//"encoding/hex"
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)
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/* Global & initialization */
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var AppDir = os.Getenv("HOME") + "/.tendermint"
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var Config Config_
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func initFlags(printHelp *bool) {
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flag.BoolVar(printHelp, "help", false, "Print this help message.")
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flag.StringVar(&Config.LAddr, "laddr", Config.LAddr, "Listen address. (0.0.0.0:0 means any interface, any port)")
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flag.StringVar(&Config.Seed, "seed", Config.Seed, "Address of seed node")
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}
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func init() {
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configFile := AppDir + "/config.json"
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// try to read configuration. if missing, write default
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configBytes, err := ioutil.ReadFile(configFile)
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if err != nil {
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defaultConfig.write(configFile)
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fmt.Println("Config file written to config.json. Please edit & run again")
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os.Exit(1)
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return
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}
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// try to parse configuration. on error, die
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Config = Config_{}
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err = json.Unmarshal(configBytes, &Config)
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if err != nil {
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log.Panicf("Invalid configuration file %s: %v", configFile, err)
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}
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err = Config.validate()
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if err != nil {
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log.Panicf("Invalid configuration file %s: %v", configFile, err)
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}
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// try to parse arg flags, which can override file configuration.
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var printHelp bool
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initFlags(&printHelp)
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flag.Parse()
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if printHelp {
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fmt.Println("----------------------------------")
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flag.PrintDefaults()
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fmt.Println("----------------------------------")
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os.Exit(0)
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}
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}
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/* Default configuration */
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var defaultConfig = Config_{
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LAddr: "0.0.0.0:0",
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Seed: "",
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Db: DbConfig{
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Type: "level",
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Dir: AppDir + "/data",
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},
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Twilio: TwilioConfig{},
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}
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/* Configuration types */
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type Config_ struct {
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LAddr string
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Seed string
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Db DbConfig
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Twilio TwilioConfig
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}
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type TwilioConfig struct {
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Sid string
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Token string
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From string
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To string
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MinInterval int
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}
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type DbConfig struct {
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Type string
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Dir string
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}
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func (cfg *Config_) validate() error {
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if cfg.LAddr == "" {
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cfg.LAddr = defaultConfig.LAddr
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}
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if cfg.Seed == "" {
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cfg.Seed = defaultConfig.Seed
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}
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if cfg.Db.Type == "" {
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return errors.New("Db.Type must be set")
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}
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return nil
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}
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func (cfg *Config_) bytes() []byte {
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configBytes, err := json.MarshalIndent(cfg, "", "\t")
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if err != nil {
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panic(err)
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}
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return configBytes
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}
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func (cfg *Config_) write(configFile string) {
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if strings.Index(configFile, "/") != -1 {
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err := os.MkdirAll(filepath.Dir(configFile), 0700)
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if err != nil {
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panic(err)
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}
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}
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err := ioutil.WriteFile(configFile, cfg.bytes(), 0600)
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if err != nil {
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panic(err)
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}
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}
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/* TODO: generate priv/pub keys
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func generateKeys() string {
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bytes := &[30]byte{}
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rand.Read(bytes[:])
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return hex.EncodeToString(bytes[:])
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}
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*/
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