spf13--cobra/cobra/cmd/root.go

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// Copyright © 2015 Steve Francia <spf@spf13.com>.
//
// 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"
homedir "github.com/mitchellh/go-homedir"
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"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var (
// Used for flags.
cfgFile, userLicense string
rootCmd = &cobra.Command{
Use: "cobra",
Short: "A generator for Cobra based Applications",
Long: `Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
}
)
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// Execute executes the root command.
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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er(err)
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}
}
func init() {
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initViper()
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rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
rootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "author name for copyright attribution")
rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "name of license for the project (can provide `license` in config)")
rootCmd.PersistentFlags().Bool("viper", true, "use Viper for configuration")
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viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
viper.BindPFlag("useViper", rootCmd.PersistentFlags().Lookup("viper"))
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viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
viper.SetDefault("license", "apache")
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rootCmd.AddCommand(initCmd)
rootCmd.AddCommand(addCmd)
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}
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func initViper() {
if cfgFile != "" {
// Use config file from the flag.
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viper.SetConfigFile(cfgFile)
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} else {
// Find home directory.
home, err := homedir.Dir()
if err != nil {
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er(err)
}
// Search config in home directory with name ".cobra" (without extension).
viper.AddConfigPath(home)
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viper.SetConfigName(".cobra")
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}
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viper.AutomaticEnv()
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if err := viper.ReadInConfig(); err == nil {
fmt.Println("Using config file:", viper.ConfigFileUsed())
}
}