fix(export): align label separator default (comma) with other commands

Signed-off-by: Aleksei Igrychev <aleksei.igrychev@palark.com>

Author: alexey-igrychev

cmd/werf/common/common.go

@@ -419,8 +419,6 @@ Format: annoName=annoValue[<separator>annoName=annoValue ...]. The default separ
 Also, can be specified with $WERF_ADD_ANNOTATION_* (e.g. $WERF_ADD_ANNOTATION_1=annoName1=annoValue1, $WERF_ADD_ANNOTATION_2=annoName2=annoValue2)`, DefaultPairSeparator))
 }
 
-const DefaultAnnoAndLabelPairSeparator = "\n"
-
 func SetupAddAnnotationSeparator(cmdData *CmdData, cmd *cobra.Command) {
 	cmdData.AddAnnotationSeparator = new(string)
 

cmd/werf/export/export.go

@@ -128,16 +128,16 @@ func NewExportCmd(ctx context.Context) *cobra.Command {
 	cmd.Flags().StringArrayVarP(&tagTemplateList, "tag", "", []string{}, `Set a tag template (can specify multiple).
 It is necessary to use image name shortcut %image% or %image_slug% if multiple images are exported (e.g. REPO:TAG-%image% or REPO-%image%:TAG)`)
 
-	cmd.Flags().StringArrayVarP(&addLabelArray, "add-label", "", []string{}, `Add label to exported images (can specify multiple).
-Format: labelName=labelValue[<separator>labelName=labelValue ...]. The default separator is a newline ("\n"), but it can be customized using the --add-label-separator flag.
-Also, can be specified with $WERF_EXPORT_ADD_LABEL_* (e.g. $WERF_EXPORT_ADD_LABEL_1=labelName1=labelValue1, $WERF_EXPORT_ADD_LABEL_2=labelName2=labelValue2)`)
+	cmd.Flags().StringArrayVarP(&addLabelArray, "add-label", "", []string{}, fmt.Sprintf(`Add label to exported images (can specify multiple).
+Format: labelName=labelValue[<separator>labelName=labelValue ...]. The default separator is a newline %q, but it can be customized using the --add-label-separator flag.
+Also, can be specified with $WERF_EXPORT_ADD_LABEL_* (e.g. $WERF_EXPORT_ADD_LABEL_1=labelName1=labelValue1, $WERF_EXPORT_ADD_LABEL_2=labelName2=labelValue2)`, common.DefaultPairSeparator))
 
-	defaultValue := common.DefaultAnnoAndLabelPairSeparator
+	defaultValue := common.DefaultPairSeparator
 	if os.Getenv("WERF_EXPORT_ADD_LABEL_SEPARATOR") != "" {
 		defaultValue = os.Getenv("WERF_EXPORT_ADD_LABEL_SEPARATOR")
 	}
 
-	cmd.Flags().StringVarP(&addLabelSeparator, "add-label-separator", "", defaultValue, `Separator for --add-label values (default $WERF_EXPORT_ADD_LABEL_SEPARATOR or "\n")`)
+	cmd.Flags().StringVarP(&addLabelSeparator, "add-label-separator", "", defaultValue, fmt.Sprintf(`Separator for --add-label values (default $WERF_EXPORT_ADD_LABEL_SEPARATOR or %q)`, common.DefaultPairSeparator))
 
 	commonCmdData.SetupSkipImageSpecStage(cmd)
 

docs/_includes/reference/cli/werf_export.md

@@ -38,13 +38,13 @@ werf export [IMAGE_NAME...] [options]
       --add-label=[]
             Add label to exported images (can specify multiple).
             Format: labelName=labelValue[<separator>labelName=labelValue ...]. The default          
-            separator is a newline ("\n"), but it can be customized using the --add-label-separator 
+            separator is a newline ",", but it can be customized using the --add-label-separator    
             flag.
             Also, can be specified with $WERF_EXPORT_ADD_LABEL_* (e.g.                              
             $WERF_EXPORT_ADD_LABEL_1=labelName1=labelValue1,                                        
             $WERF_EXPORT_ADD_LABEL_2=labelName2=labelValue2)
-      --add-label-separator="\n"
-            Separator for --add-label values (default $WERF_EXPORT_ADD_LABEL_SEPARATOR or "\n")
+      --add-label-separator=","
+            Separator for --add-label values (default $WERF_EXPORT_ADD_LABEL_SEPARATOR or ",")
       --cache-repo=[]
             Specify one or multiple cache repos with images that will be used as a cache. Cache     
             will be populated when pushing newly built images into the primary repo and when