/
root.go
103 lines (83 loc) · 3.07 KB
/
root.go
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package cmd
/* Copyright © 2022 Brian C Sparks <briancsparks@gmail.com> -- MIT (see LICENSE file) */
import (
"fmt"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"os"
"strings"
homedir "github.com/mitchellh/go-homedir"
"github.com/spf13/viper"
)
var cfgFile string
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "wingman",
Short: "Your personal developer-helper app",
Long: `
Wingman watches your keystrokes and does helpful tricks. For example:
Move windows to places.
More good stuff here.`,
// 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)
// Here you will define your flags and configuration settings.
// Cobra supports persistent flags, which, if defined here,
// will be global for your application.
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.wingman.yaml)")
// Cobra also supports local flags, which will only run
// when this action is called directly.
//rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}
// 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 ".wingman" (without extension).
viper.AddConfigPath(home)
viper.SetConfigName(".wingman")
}
viper.SetEnvPrefix("WINGMAN")
viper.AutomaticEnv() // read in environment variables that match
bindFlags(rootCmd)
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
fmt.Println("Using config file:", viper.ConfigFileUsed())
}
}
// Stolen from: https://github.com/carolynvs/stingoftheviper/blob/main/main.go
// Bind each cobra flag to its associated viper configuration (config file and environment variable)
func bindFlags(cmd *cobra.Command /*, v *viper.Viper*/) {
cmd.Flags().VisitAll(func(f *pflag.Flag) {
// Environment variables can't have dashes in them, so bind them to their equivalent
// keys with underscores, e.g. --favorite-color to STING_FAVORITE_COLOR
if strings.Contains(f.Name, "-") {
envVarSuffix := strings.ToUpper(strings.ReplaceAll(f.Name, "-", "_"))
viper.BindEnv(f.Name, fmt.Sprintf("%s_%s", "KRONK", envVarSuffix))
}
// Apply the viper config value to the flag when the flag is not set and viper has a value
if !f.Changed && viper.IsSet(f.Name) {
val := viper.Get(f.Name)
cmd.Flags().Set(f.Name, fmt.Sprintf("%v", val))
}
})
}