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config.go
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config.go
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package config
import (
"errors"
"io"
"strings"
"github.com/mitchellh/mapstructure"
"github.com/spf13/viper"
)
type Config struct {
Viper *viper.Viper
}
func New(reader io.ReadCloser) (*Config, error) {
defer reader.Close()
v := viper.New()
v.SetConfigType("toml")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
v.AutomaticEnv()
err := v.ReadConfig(reader)
if err != nil {
return nil, err
}
return &Config{Viper: v}, nil
}
func (c *Config) Sub(prefix string) (*Config, error) {
if !c.Viper.IsSet(prefix) {
return nil, errors.New("config key " + prefix + " is not set")
}
return &Config{
Viper: c.Viper.Sub(prefix),
}, nil
}
func (c *Config) UnmarshalALL(v interface{}) error {
return c.Unmarshal("", v)
}
func (c *Config) Unmarshal(prefix string, v interface{}) error {
var _v *viper.Viper
if prefix != "" {
if !c.Viper.IsSet(prefix) {
return errors.New("config key " + prefix + " is not set")
}
_v = c.Viper.Sub(prefix)
} else {
_v = c.Viper
}
if _v == nil {
return errors.New("get viper error")
}
err := _v.Unmarshal(v, func(dc *mapstructure.DecoderConfig) {
dc.TagName = "toml"
dc.IgnoreUntaggedFields = true
})
if err != nil {
return err
}
return nil
}
func (c *Config) GetString(k string, defaults ...string) string {
if !c.Viper.InConfig(k) && len(defaults) == 1 {
return defaults[0]
}
return c.Viper.GetString(k)
}
func (c *Config) GetInt(k string, defaults ...int) int {
if !c.Viper.InConfig(k) && len(defaults) == 1 {
return defaults[0]
}
return c.Viper.GetInt(k)
}
func (c *Config) GetBool(k string, defaults ...bool) bool {
if !c.Viper.InConfig(k) && len(defaults) == 1 {
return defaults[0]
}
return c.Viper.GetBool(k)
}