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/
root.go
128 lines (106 loc) · 3.02 KB
/
root.go
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// Copyright © 2017 Salim Alami Idrissi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"fmt"
"log"
"os"
"time"
"github.com/celrenheit/sandglass-grpc/go/sgproto"
"github.com/celrenheit/sandglass/cmd/cmdcommon"
"google.golang.org/grpc"
_ "google.golang.org/grpc/encoding/gzip"
homedir "github.com/mitchellh/go-homedir"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var (
cfgFile string
conn *grpc.ClientConn
client sgproto.BrokerServiceClient
)
var (
Version = "dev"
Commit = "none"
Date = "unknown"
)
// RootCmd represents the base command when called without any subcommands
var RootCmd = &cobra.Command{
Use: "sandctl",
Short: "SandCtl",
Long: `SandCtl`,
}
// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
if err := RootCmd.Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
if conn != nil {
if err := conn.Close(); err != nil {
log.Fatalf("error while closing connection: %v", err)
}
}
}
func init() {
cobra.OnInitialize(initConfig, createConnection)
RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.sandctl.yaml)")
RootCmd.PersistentFlags().StringSliceP("addrs", "s", []string{":7170"}, "grpc adresses of nodes in sandglass cluster")
RootCmd.PersistentFlags().Duration("timeout", 10*time.Second, "timeout")
cmdcommon.BindViper(RootCmd.PersistentFlags(),
"config",
"addrs",
"timeout",
)
}
// initConfig reads in config file and ENV variables if set.
func initConfig() {
if cfgFile != "" {
// Use config file from the flag.
viper.SetConfigFile(cfgFile)
} else {
// Find home directory.
home, err := homedir.Dir()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// Search config in home directory with name ".sandctl" (without extension).
viper.AddConfigPath(home)
viper.SetConfigName(".sandctl")
}
viper.AutomaticEnv() // read in environment variables that match
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
fmt.Println("Using config file:", viper.ConfigFileUsed())
}
}
func createConnection() {
var err error
for _, addr := range viper.GetStringSlice("addrs") {
conn, err = grpc.Dial(addr, grpc.WithInsecure(),
grpc.WithDefaultCallOptions(
grpc.UseCompressor("gzip"),
),
)
if err == nil {
break
}
}
if conn == nil {
log.Fatal("no addrs found")
}
client = sgproto.NewBrokerServiceClient(conn)
}