/
root.go
76 lines (61 loc) · 1.79 KB
/
root.go
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package cmd
import (
"fmt"
"os"
"os/signal"
"syscall"
"github.com/inconshreveable/log15"
"github.com/mitchellh/go-homedir"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var cfgFile string
var collectorHost string
var queryHost string
var logger log15.Logger
var signals chan os.Signal
var rootCmd = &cobra.Command{
Use: "mbcli",
Short: "Message bus client, travel time discovery system.",
}
// 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)
}
}
func init() {
cobra.OnInitialize(initConfig)
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.mbcli.yaml)")
rootCmd.PersistentFlags().StringVar(&collectorHost, "collector_host", "127.0.0.1:9000",
"configure collector host")
rootCmd.PersistentFlags().StringVar(&queryHost, "query_host", "127.0.0.1:8000",
"configure query host")
signals = make(chan os.Signal, 2)
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
logger = log15.New()
}
// 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 ".mbcli" (without extension).
viper.AddConfigPath(home)
viper.SetConfigName(".mbcli")
}
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())
}
}