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root.go
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root.go
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/*
* Copyright © 2023 Clyso GmbH
*
* 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"
"os"
"strings"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var cfgFile string
var (
// flags:
address = ""
user = ""
)
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "chorctl",
Short: "Manages and monitors s3 migrations",
Long: `Chorctl is a CLI tool to monitor and manage chorus application
performing live migrations and replication of s3 storages.`,
// Uncomment the following line if your bare application
// has an action associated with it:
// Run: func(cmd *cobra.Command, args []string) { },
}
// 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() {
err := rootCmd.Execute()
if err != nil {
os.Exit(1)
}
}
func SetVersionInfo(version, commit, date string) {
rootCmd.Version = fmt.Sprintf("%q (Built on %q from Git SHA %q)", version, date, commit)
}
func init() {
cobra.OnInitialize(initConfig)
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.chorctl.yaml)")
rootCmd.PersistentFlags().StringVarP(&address, "address", "a", "localhost:9670", "address to chorus management grpc api (default: http://localhost:9670)")
rootCmd.PersistentFlags().StringVarP(&user, "user", "u", "", "storage user")
_ = viper.BindPFlag("address", rootCmd.PersistentFlags().Lookup("address"))
_ = viper.BindPFlag("user", rootCmd.PersistentFlags().Lookup("user"))
verbose := rootCmd.PersistentFlags().BoolP("verbose", "v", false, "prints additional log information")
if verbose != nil && *verbose {
logrus.SetLevel(logrus.InfoLevel)
} else {
logrus.SetLevel(logrus.WarnLevel)
}
}
// 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 := os.UserHomeDir()
cobra.CheckErr(err)
// Search config in home directory with name ".chorctl" (without extension).
viper.AddConfigPath(home)
viper.SetConfigType("yaml")
viper.SetConfigName(".chorctl")
}
viper.EnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.SetEnvPrefix("CHORUS")
viper.AutomaticEnv() // read in environment variables that match
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
logrus.Info("Using config file:", viper.ConfigFileUsed())
}
address = viper.GetString("address")
}