Show label list on label set (#9251)

* Showing the list of labels of template files #7812

* Returning and logging errors when loading labels

* Commenting public method

* Change log level in case of error loading labels.

4 files changed, 37 insertions, 8 deletions

diff --git a/models/issue_label.go b/models/issue_label.go
index 4318406af7..1ea0ed85cc 100644
--- a/models/issue_label.go
+++ b/models/issue_label.go
@@ -132,6 +132,25 @@ func (label *Label) ForegroundColor() template.CSS {
 	return template.CSS("#000")
 }
 
+func loadLabels(labelTemplate string) ([]string, error) {
+	list, err := GetLabelTemplateFile(labelTemplate)
+	if err != nil {
+		return nil, ErrIssueLabelTemplateLoad{labelTemplate, err}
+	}
+
+	labels := make([]string, len(list))
+	for i := 0; i < len(list); i++ {
+		labels[i] = list[i][0]
+	}
+	return labels, nil
+}
+
+// LoadLabelsFormatted loads the labels' list of a template file as a string separated by comma
+func LoadLabelsFormatted(labelTemplate string) (string, error) {
+	labels, err := loadLabels(labelTemplate)
+	return strings.Join(labels, ", "), err
+}
+
 func initalizeLabels(e Engine, repoID int64, labelTemplate string) error {
 	list, err := GetLabelTemplateFile(labelTemplate)
 	if err != nil {
diff --git a/models/repo.go b/models/repo.go
index 6a260d393c..2fd4df9206 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -64,8 +64,8 @@ var (
 	// Readmes contains the readme files
 	Readmes []string
 
-	// LabelTemplates contains the label template files
-	LabelTemplates []string
+	// LabelTemplates contains the label template files and the list of labels for each file
+	LabelTemplates map[string]string
 
 	// ItemsPerPage maximum items per page in forks, watchers and stars of a repo
 	ItemsPerPage = 40
@@ -100,11 +100,21 @@ func loadRepoConfig() {
 	Gitignores = typeFiles[0]
 	Licenses = typeFiles[1]
 	Readmes = typeFiles[2]
-	LabelTemplates = typeFiles[3]
+	LabelTemplatesFiles := typeFiles[3]
 	sort.Strings(Gitignores)
 	sort.Strings(Licenses)
 	sort.Strings(Readmes)
-	sort.Strings(LabelTemplates)
+	sort.Strings(LabelTemplatesFiles)
+
+	// Load label templates
+	LabelTemplates = make(map[string]string)
+	for _, templateFile := range LabelTemplatesFiles {
+		labels, err := LoadLabelsFormatted(templateFile)
+		if err != nil {
+			log.Error("Failed to load labels: %v", err)
+		}
+		LabelTemplates[templateFile] = labels
+	}
 
 	// Filter out invalid names and promote preferred licenses.
 	sortedLicenses := make([]string, 0, len(Licenses))
diff --git a/templates/repo/create.tmpl b/templates/repo/create.tmpl
index c71c3ab5a6..b63af09cec 100644
--- a/templates/repo/create.tmpl
+++ b/templates/repo/create.tmpl
@@ -109,8 +109,8 @@
 								<div class="default text">{{.i18n.Tr "repo.issue_labels_helper"}}</div>
 								<div class="menu">
 									<div class="item" data-value="">{{.i18n.Tr "repo.issue_labels_helper"}}</div>
-									{{range .LabelTemplates}}
-										<div class="item" data-value="{{.}}">{{.}}</div>
+									{{range $template, $labels := .LabelTemplates}}
+										<div class="item" data-value="{{$template}}">{{$template}}<br/><i>({{$labels}})</i></div>
 									{{end}}
 								</div>
 							</div>
diff --git a/templates/repo/issue/labels.tmpl b/templates/repo/issue/labels.tmpl
index c3bfc9ccc6..32a5c2a4ef 100644
--- a/templates/repo/issue/labels.tmpl
+++ b/templates/repo/issue/labels.tmpl
@@ -79,8 +79,8 @@
 										<input type="hidden" name="template_name" value="Default">
 										<div class="default text">{{.i18n.Tr "repo.issues.label_templates.helper"}}</div>
 										<div class="menu">
-											{{range .LabelTemplates}}
-											<div class="item" data-value="{{.}}">{{.}}</div>
+											{{range $template, $labels := .LabelTemplates}}
+												<div class="item" data-value="{{$template}}">{{$template}}<br/><i>({{$labels}})</i></div>
 											{{end}}
 										</div>
 									</div>