/
config.go
105 lines (83 loc) · 1.92 KB
/
config.go
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package config
import (
"bytes"
"encoding/base64"
"os"
"strings"
jsoniter "github.com/json-iterator/go"
"github.com/spf13/viper"
)
// -X 'github.com/fox-one/pkg/config.DATA=$(DATA)'
var DATA string
func Load(configFile string, typ string, v interface{}) error {
viper.SetConfigType(typ)
viper.AutomaticEnv()
if configFile != "" {
f, err := os.Open(configFile)
if err != nil {
return err
}
defer f.Close()
if err := viper.ReadConfig(f); err != nil {
return err
}
}
data, err := jsoniter.Marshal(viper.AllSettings())
if err != nil {
return err
}
if err := jsoniter.Unmarshal(data, v); err != nil {
return err
}
if DATA != "" {
data, err := base64.StdEncoding.DecodeString(DATA)
if err != nil {
return err
}
embed := viper.New()
embed.SetConfigType("yaml")
if err := embed.ReadConfig(bytes.NewBuffer(data)); err != nil {
return err
}
embedData, err := jsoniter.Marshal(embed.AllSettings())
if err != nil {
return err
}
if err := jsoniter.Unmarshal(embedData, v); err != nil {
return err
}
}
return nil
}
func LoadYaml(configFile string, v interface{}) error {
return Load(configFile, "yaml", v)
}
func LoadJson(configFile string, v interface{}) error {
return Load(configFile, "json", v)
}
type H map[string]interface{}
func SetDefaults(defaults H) {
for k, v := range defaults {
SetDefault(k, v)
}
}
func SetDefault(key string, value interface{}) {
viper.SetDefault(key, value)
}
// load os environments to viper defaults
// with prefix "fox"
// FOX_DB__NAME -> db.name
// FOX_DB__BROKER_ID -> db.broker_id
func AutomaticLoadEnv(prefix string) {
prefix = strings.ToLower(prefix) + "_"
for _, env := range os.Environ() {
items := strings.Split(env, "=")
k, v := strings.ToLower(items[0]), items[1]
if v == "" || !strings.HasPrefix(k, prefix) {
continue
}
k = strings.TrimPrefix(k, prefix)
k = strings.ReplaceAll(k, "__", ".")
SetDefault(k, v)
}
}