New setting show_update_notification_to_superusers_only makes it possible to hide update notifications for users except for super users

config/global.ini.php

@@ -456,6 +456,10 @@
 ; the page will automatically refresh every 5 minutes. Set to 0 to disable automatic refresh
 multisites_refresh_after_seconds = 300
 
+; by default, an update notification for a new version of Piwik is shown to every user. Set to 1 if only
+; the superusers should see the notification.
+show_update_notification_to_superusers_only = 0
+
 ; Set to 1 if you're using https on your Piwik server and Piwik can't detect it,
 ; e.g., a reverse proxy using https-to-http, or a web server that doesn't
 ; set the HTTPS environment variable.

core/SettingsPiwik.php

@@ -45,6 +45,16 @@ public static function isUserCredentialsSanityCheckEnabled()
         return Config::getInstance()->General['disable_checks_usernames_attributes'] == 0;
     }
 
+    /**
+     * Should Piwik show the update notification to superusers only?
+     *
+     * @return bool  True if show to superusers only; false otherwise
+     */
+    public static function isShowUpdateNotificationToSuperUsersOnlyEnabled()
+    {
+        return Config::getInstance()->General['show_update_notification_to_superusers_only'] == 1;
+    }
+
     /**
      * Returns every stored segment to pre-process for each site during cron archiving.
      *

core/View.php

@@ -241,6 +241,7 @@ public function render()
             $this->userIsAnonymous = Piwik::isUserIsAnonymous();
             $this->userIsSuperUser = Piwik::hasUserSuperUserAccess();
             $this->latest_version_available = UpdateCheck::isNewestVersionAvailable();
+            $this->showUpdateNotificationToUser = !SettingsPiwik::isShowUpdateNotificationToSuperUsersOnlyEnabled() || Piwik::hasUserSuperUserAccess();
             $this->disableLink = Common::getRequestVar('disableLink', 0, 'int');
             $this->isWidget = Common::getRequestVar('widget', 0, 'int');
             $this->isMultiServerEnvironment = SettingsPiwik::isMultiServerEnvironment();

plugins/CoreHome/templates/_headerMessage.twig

@@ -10,7 +10,7 @@
     </span>
 {% endset %}
 
-{% if (latest_version_available and hasSomeViewAccess and not isUserIsAnonymous) or (isSuperUser and isAdminArea is defined and isAdminArea) %}
+{% if (latest_version_available and hasSomeViewAccess and not isUserIsAnonymous and showUpdateNotificationToUser) or (isSuperUser and isAdminArea is defined and isAdminArea) %}
 <div piwik-expand-on-hover
      id="header_message"
      class="piwikSelector borderedControl {% if not latest_version_available %}header_info{% else %}{% endif %} piwikTopControl {% if latest_version_available %}update_available{% endif %}"