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, error) {
o := defaultOpts()
for i := range opts {
opts[i](o)
}
var v *viper.Viper
if o.v != nil {
v = o.v
} else {
v = viper.New()
}
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, fmt.Errorf("failed to read config: %w", err)
}
}
if o.configDir != "" {
if err := config.ReadConfigDir(v, o.configDir); err != nil {
return nil, fmt.Errorf("failed to read config dir: %w", err)
}
}
return v, nil
}
func ReloadViper(opts ...Option) error {
o := defaultOpts()
for i := range opts {
opts[i](o)
}
if o.v == nil {
return fmt.Errorf("provide viper in opts")
}
if o.path != "" {
err := o.v.ReadInConfig()
if err != nil {
return fmt.Errorf("rereading configuration file: %w", err)
}
}
if o.configDir != "" {
if err := config.ReadConfigDir(o.v, o.configDir); err != nil {
return fmt.Errorf("rereading configuration dir: %w", err)
}
}
return nil
}