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root.go
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root.go
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package cmd
import (
"context"
"strings"
"github.com/rs/zerolog/log"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var cfgFile string
// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
Use: "api",
Short: "stud42 API",
}
// 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(ctx context.Context) {
cobra.CheckErr(rootCmd.ExecuteContext(ctx))
}
func init() {
cobra.OnInitialize(
// initConfig reads in config file and ENV variables if set.
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 config/stud42.yaml)")
}
// initConfig reads in config file and ENV variables if set.
func initConfig() {
if cfgFile != "" {
// Use config file from the flag.
viper.SetConfigFile(cfgFile)
} else {
viper.SetConfigName("stud42")
viper.SetConfigType("yaml")
viper.AddConfigPath("./config")
}
replacer := strings.NewReplacer("-", "_", ".", "_")
// Replace dot and dash to underscore in env variables.
viper.SetEnvKeyReplacer(replacer)
// allow empty env variables to be set (e.g. for local development)
viper.AllowEmptyEnv(true)
// read in environment variables that match
viper.AutomaticEnv()
// If a config file is found, read it in.
if err := viper.ReadInConfig(); err == nil {
log.Info().Msgf("Using config file: %s", viper.ConfigFileUsed())
}
}