[#125] ir: Use `internal/common/config` for reading config

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

cmd/frostfs-ir/defaults.go

@@ -1,44 +1,28 @@
 package main
 
 import (
-	"strings"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/config"
+	configViper "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common/config"
 	"github.com/spf13/viper"
 )
 
 func newConfig(path, directory string) (*viper.Viper, error) {
 	const envPrefix = "FROSTFS_IR"
 
-	var (
-		err error
-		v   = viper.New()
-	)
+	var err error
+	var dv = viper.New()
 
-	v.SetEnvPrefix(envPrefix)
-	v.AutomaticEnv()
-	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	defaultConfiguration(dv)
 
-	defaultConfiguration(v)
-
-	if path != "" {
-		v.SetConfigFile(path)
-		if strings.HasSuffix(path, ".json") {
-			v.SetConfigType("json")
-		} else {
-			v.SetConfigType("yml")
-		}
-		if err = v.ReadInConfig(); err != nil {
-			return v, err
-		}
+	_, _, err = configViper.CreateViper(configViper.WithConfigFile(path),
+		configViper.WithConfigDir(directory), configViper.WithEnvPrefix(envPrefix),
+		configViper.WithViper(dv))
+	if err != nil {
+		return nil, err
 	}
 
-	if directory != "" {
-		err = config.ReadConfigDir(v, directory)
-	}
-
-	return v, err
+	return dv, err
 }
 
 func defaultConfiguration(cfg *viper.Viper) {