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root.go
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root.go
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/*
Copyright © 2020 Manuel Stößel <manuel@stoessel.dev>
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"
"github.com/spf13/cobra"
homedir "github.com/mitchellh/go-homedir"
"github.com/spf13/viper"
)
var cfgFile string
var apiToken string
var baseURL string
var jsonOutput bool
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "k8c-cli",
Short: "A CLI for interacting with Kubermatic Kubernetes Platform.",
Long: `This is a CLI for interacting with the REST API of Kubermatic Kubernetes Platform.`,
// 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() {
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/.k8c-cli.yaml)")
rootCmd.PersistentFlags().StringVarP(&apiToken, "token", "t", "", "API token for authenticating with Kubermatic API.")
viper.BindPFlag("token", rootCmd.PersistentFlags().Lookup("token"))
rootCmd.PersistentFlags().StringVarP(&baseURL, "url", "u", "", "URL of the Kubermatic API including scheme.")
viper.BindPFlag("url", rootCmd.PersistentFlags().Lookup("url"))
rootCmd.PersistentFlags().BoolVarP(&jsonOutput, "json", "o", false, "formats output as JSON")
viper.BindPFlag("json", rootCmd.PersistentFlags().Lookup("json"))
}
// 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 ".k8c-cli" (without extension).
viper.AddConfigPath(home)
viper.SetConfigName(".k8c-cli")
}
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())
}
}