fix: load StringArray from config file

lib/flags.go

@@ -66,13 +66,10 @@ func bindEnvVarIntoViper(v *viper.Viper, fullFlagName, envPrefix string) {
 func applyViperFlagToCommand(flag *pflag.Flag, val interface{}, cmd *cobra.Command) {
 	switch t := val.(type) {
 	case []interface{}:
-		var paramSlice []string
 		for _, param := range t {
-			paramSlice = append(paramSlice, param.(string))
-		}
-		valStr := strings.Join(paramSlice, ",")
-		if err := flag.Value.Set(valStr); err != nil {
-			log.Err(err).Msg("Failed to set Viper flags")
+			if err := flag.Value.Set(param.(string)); err != nil {
+				log.Err(err).Msg("Failed to set Viper flags")
+			}
 		}
 	default:
 		newVal := fmt.Sprintf("%v", val)

lib/flags_test.go

@@ -331,6 +331,34 @@ test-float: 123.456
 		assert.Equal(t, 123.456, testFloat)
 	})
 
+	t.Run("BindFlags_FromYAML_StringArrayVar", func(t *testing.T) {
+		assertClearEnv(t)
+		defer clearEnvVars(t)
+
+		yamlConfig := []byte(`
+regex:
+  - test\=
+  - array\=
+  - flag\=
+another-regex: [test\=, array\=, flag\=]
+`)
+
+		cmd := &cobra.Command{}
+		v := getViper()
+		v.SetConfigType("yaml")
+		assert.NoError(t, v.ReadConfig(bytes.NewBuffer(yamlConfig)))
+
+		var testArray []string
+		cmd.Flags().StringArrayVar(&testArray, "regex", []string{}, "Test array flag")
+		cmd.Flags().StringArrayVar(&testArray, "another-regex", []string{}, "Test array flag")
+
+		err := lib.BindFlags(cmd, v, envVarPrefix)
+		assert.NoError(t, err)
+
+		assert.Equal(t, []string{"test\\=", "array\\=", "flag\\="}, testArray)
+		assert.Equal(t, []string{"test\\=", "array\\=", "flag\\="}, testArray)
+	})
+
 	t.Run("BindFlags_FromYAML_SubCMD", func(t *testing.T) {
 		assertClearEnv(t)
 		defer clearEnvVars(t)