frostfs-node/cmd/internal/common/config/viper.go

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package config
import (
"fmt"
"strings"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/config"
"github.com/spf13/viper"
)
const (
Separator = "."
// EnvSeparator is a section separator in ENV variables.
EnvSeparator = "_"
)
func CreateViper(opts ...Option) (*viper.Viper, *Opts, error) {
v := viper.New()
o := DefaultOpts()
for i := range opts {
opts[i](o)
}
if o.EnvPrefix != "" {
v.SetEnvPrefix(o.EnvPrefix)
v.AutomaticEnv()
v.SetEnvKeyReplacer(strings.NewReplacer(Separator, EnvSeparator))
}
if o.Path != "" {
v.SetConfigFile(o.Path)
err := v.ReadInConfig()
if err != nil {
return nil, nil, fmt.Errorf("failed to read config: %w", err)
}
}
if o.ConfigDir != "" {
if err := config.ReadConfigDir(v, o.ConfigDir); err != nil {
return nil, nil, fmt.Errorf("failed to read config dir: %w", err)
}
}
return v, o, nil
}
func ReloadViper(v *viper.Viper, o Opts) error {
if o.Path != "" {
err := v.ReadInConfig()
if err != nil {
return fmt.Errorf("rereading configuration file: %w", err)
}
}
if o.ConfigDir != "" {
if err := config.ReadConfigDir(v, o.ConfigDir); err != nil {
return fmt.Errorf("rereading configuration dir: %w", err)
}
}
return nil
}