fix(settings): clear helm url if requested [EE-2494] (#6526)

* fix(settings): clear helm url if requested [EE-2494]

fix [EE-2494]

before this PR, helm url would clear when updating settings, if the helm url key wasn't provided.
in this PR, it will be changed only if required

* fix(settings): allow empty helm repo

* chore(deps): run yarn

* fix(settings): set helm repo url

api/http/handler/settings/settings_update.go

@@ -116,6 +116,8 @@ func (handler *Handler) settingsUpdate(w http.ResponseWriter, r *http.Request) *
 	}
 
 	if payload.HelmRepositoryURL != nil {
+		if *payload.HelmRepositoryURL != "" {
+
 			newHelmRepo := strings.TrimSuffix(strings.ToLower(*payload.HelmRepositoryURL), "/")
 
 			if newHelmRepo != settings.HelmRepositoryURL && newHelmRepo != portainer.DefaultHelmRepositoryURL {
@@ -123,12 +125,14 @@ func (handler *Handler) settingsUpdate(w http.ResponseWriter, r *http.Request) *
 				if err != nil {
 					return &httperror.HandlerError{http.StatusBadRequest, "Invalid Helm repository URL. Must correspond to a valid URL format", err}
 				}
+
 			}
 
 			settings.HelmRepositoryURL = newHelmRepo
 		} else {
 			settings.HelmRepositoryURL = ""
 		}
+	}
 
 	if payload.BlackListedLabels != nil {
 		settings.BlackListedLabels = payload.BlackListedLabels

app/portainer/views/settings/settings.html

@@ -85,7 +85,7 @@
             <div class="form-group">
               <label for="helmrepository_url" class="col-sm-1 control-label text-left"> URL </label>
               <div class="col-sm-11">
-                <input type="text" class="form-control" ng-model="settings.HelmRepositoryURL" id="helmrepository_url" placeholder="https://charts.bitnami.com/bitnami" required />
+                <input type="text" class="form-control" ng-model="settings.HelmRepositoryURL" id="helmrepository_url" placeholder="https://charts.bitnami.com/bitnami" />
               </div>
             </div>
           </div>

yarn.lock

@@ -4547,6 +4547,7 @@ angular-moment-picker@^0.10.2:
   dependencies:
     angular-mocks "1.6.1"
     angular-sanitize "1.6.1"
+    lodash-es "^4.17.15"
 
 angular-resource@1.8.2:
   version "1.8.2"