im-kulikov/helium

package settings

import (
    "strings"

    "github.com/spf13/viper"

    "github.com/im-kulikov/helium/module"
)

// Module of config things.
// nolint:gochecknoglobals
var Module = module.Module{
    {Constructor: New},
}

// nolint:gochecknoglobals
var global = viper.New()

// Viper returns global Viper instance.
func Viper() *viper.Viper { return global }

// New init viper settings.
func New(app *Core) (*viper.Viper, error) {
    v := viper.New()
    global = v
    v.SetEnvPrefix(app.Prefix)
    v.AutomaticEnv()
    v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))

    if len(app.File) > 0 {
        v.SetConfigType(app.SafeType())
        v.SetConfigFile(app.File)

        if err := v.ReadInConfig(); err != nil {
            return nil, err
        }
    }

    return v, nil
}