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root.go
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root.go
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// Copyright © 2017 The Things Network
// Use of this source code is governed by the MIT license that can be found in the LICENSE file.
package cmd
import (
"fmt"
"os"
"reflect"
"strings"
cliHandler "github.com/TheThingsNetwork/go-utils/handlers/cli"
ttnlog "github.com/TheThingsNetwork/go-utils/log"
"github.com/TheThingsNetwork/go-utils/log/apex"
"github.com/TheThingsNetwork/go-utils/log/grpc"
ttnapi "github.com/TheThingsNetwork/ttn/api"
"github.com/TheThingsNetwork/ttn/ttnctl/util"
"github.com/apex/log"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"google.golang.org/grpc/grpclog"
)
var cfgFile string
var dataDir string
var debug bool
var ctx ttnlog.Interface
// RootCmd is the entrypoint for ttnctl
var RootCmd = &cobra.Command{
Use: "ttnctl",
Short: "Control The Things Network from the command line",
Long: `ttnctl controls The Things Network from the command line.`,
PersistentPreRun: func(cmd *cobra.Command, args []string) {
var logLevel = log.InfoLevel
if viper.GetBool("debug") {
logLevel = log.DebugLevel
}
ctx = apex.Wrap(&log.Logger{
Level: logLevel,
Handler: cliHandler.New(os.Stdout),
})
if viper.GetBool("debug") {
util.PrintConfig(ctx, true)
}
ttnlog.Set(ctx)
grpclog.SetLogger(grpc.Wrap(ttnlog.Get()))
if viper.GetBool("allow-insecure") {
ttnapi.AllowInsecureFallback = true
}
},
}
// Execute runs on start
func Execute() {
if err := RootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(-1)
}
}
// init initializes the configuration and command line flags
func init() {
cobra.OnInitialize(initConfig)
RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.ttnctl.yml)")
RootCmd.PersistentFlags().StringVar(&dataDir, "data", "", "directory where ttnctl stores data (default is $HOME/.ttnctl)")
RootCmd.PersistentFlags().String("discovery-address", "discover.thethingsnetwork.org:1900", "The address of the Discovery server")
RootCmd.PersistentFlags().String("router-id", "ttn-router-eu", "The ID of the TTN Router as announced in the Discovery server")
RootCmd.PersistentFlags().String("handler-id", "ttn-handler-eu", "The ID of the TTN Handler as announced in the Discovery server")
RootCmd.PersistentFlags().String("mqtt-address", "eu.thethings.network:1883", "The address of the MQTT broker")
RootCmd.PersistentFlags().String("mqtt-username", "", "The username for the MQTT broker")
RootCmd.PersistentFlags().String("mqtt-password", "", "The password for the MQTT broker")
RootCmd.PersistentFlags().String("auth-server", "https://account.thethingsnetwork.org", "The address of the OAuth 2.0 server")
RootCmd.PersistentFlags().Bool("allow-insecure", false, "Allow insecure fallback if TLS unavailable")
viper.SetDefault("gateway-id", "dev")
viper.SetDefault("gateway-token", "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJ0dG4tYWNjb3VudC12MiIsInN1YiI6ImRldiIsInR5cGUiOiJnYXRld2F5IiwiaWF0IjoxNDgyNDIxMTEyfQ.obhobeREK9bOpi-YO5lZ8rpW4CkXZUSrRBRIjbFThhvAsj_IjkFmCovIVLsGlaDVEKciZmXmWnY-6ZEgUEu6H6_GG4AD6HNHXnT0o0XSPgf5_Bc6dpzuI5FCEpcELihpBMaW3vPUt29NecLo4LvZGAuOllUYKHsZi34GYnR6PFlOgi40drN_iU_8aMCxFxm6ki83QlcyHEmDAh5GAGIym0qnUDh5_L1VE_upmoR72j8_l5lSuUA2_w8CH5_Z9CrXlTKQ2XQXsQXprkhbmOKKC8rfbTjRsB_nxObu0qcTWLH9tMd4KGFkJ20mdMw38fg2Vt7eLrkU1R1kl6a65eo6LZi0JvRSsboVZFWLwI02Azkwsm903K5n1r25Wq2oiwPJpNq5vsYLdYlb-WdAPsEDnfQGLPaqxd5we8tDcHsF4C1JHTwLsKy2Sqj8WNVmLgXiFER0DNfISDgS5SYdOxd9dUf5lTlIYdJU6aG1yYLSEhq80QOcdhCqNMVu1uRIucn_BhHbKo_LCMmD7TGppaXcQ2tCL3qHQaW8GCoun_UPo4C67LIMYUMfwd_h6CaykzlZvDlLa64ZiQ3XPmMcT_gVT7MJS2jGPbtJmcLHAVa5NZLv2d6WZfutPAocl3bYrY-sQmaSwJrzakIb2D-DNsg0qBJAZcm2o021By8U4bKAAFQ")
viper.BindPFlags(RootCmd.PersistentFlags())
}
func assertArgsLength(cmd *cobra.Command, args []string, min, max int) {
if len(args) < min || (max != 0 && len(args) > max) {
ctx.Errorf(`Invalid number of arguments to command "%s"`, cmd.CommandPath())
fmt.Println()
cmd.Example = ""
cmd.UsageFunc()(cmd)
os.Exit(1)
}
}
func printKV(key, t interface{}) {
if reflect.TypeOf(t).Kind() == reflect.Ptr {
if reflect.ValueOf(t).IsNil() {
return
}
t = reflect.Indirect(reflect.ValueOf(t)).Interface()
}
var val string
switch t := t.(type) {
case []byte:
val = fmt.Sprintf("%X", t)
default:
val = fmt.Sprintf("%v", t)
}
if val != "" {
fmt.Printf("%20s: %s\n", key, val)
}
}
func printBool(key string, value bool, truthy, falsey string) {
if value {
printKV(key, truthy)
} else {
printKV(key, falsey)
}
}
func crop(in string, length int) string {
if len(in) > length {
return in[:length-3] + "..."
}
return in
}
func confirm(prompt string) bool {
fmt.Println(prompt)
fmt.Print("> ")
var answer string
fmt.Scanf("%s", &answer)
switch strings.ToLower(answer) {
case "yes", "y":
return true
case "no", "n", "":
return false
default:
fmt.Println("When you make up your mind, please answer yes or no.")
return confirm(prompt)
}
}
// initConfig reads in config file and ENV variables if set.
func initConfig() {
if cfgFile == "" {
cfgFile = util.GetConfigFile()
}
if dataDir == "" {
dataDir = util.GetDataDir()
}
viper.SetConfigType("yaml")
viper.SetConfigFile(cfgFile)
viper.SetEnvPrefix("ttnctl") // set environment prefix
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_", "-", "_"))
viper.AutomaticEnv()
viper.BindEnv("debug")
// If a config file is found, read it in.
if _, err := os.Stat(cfgFile); err == nil {
err := viper.ReadInConfig()
if err != nil {
fmt.Println("Error when reading config file:", err)
}
}
}