Add conspicuous EOL indicator for dom0

After EOL date for the current release is decided, a simple update could
set `os-eol` feature for dom0. As soon as the time has come, the Qui
Updates systray widget will turn to a red warning sign and show
appropriate message (with option to go online to see supported releases)

resolves: QubesOS/qubes-issues#9965

Author: alimirjamali

icons/scalable/qui-red-warn.svg

@@ -17,6 +17,7 @@
 import qubesadmin.events
 import qui.utils
 from qubesadmin import exc
+from qubes_config.widgets.utils import open_url_in_disposable
 
 import gi  # isort:skip
 
@@ -95,9 +96,27 @@ def run(self):  # pylint: disable=arguments-differ
 
         self.update_indicator_state()
 
+    def obsolete_dom0(self, _event):
+        open_url_in_disposable(
+            "https://www.qubes-os.org/doc/supported-releases/",
+            self.qapp,
+        )
+
     def setup_menu(self):
         self.tray_menu.set_reserve_toggle_size(False)
 
+        if "dom0" in self.obsolete_vms:
+            self.tray_menu.append(
+                RunItem(
+                    _(
+                        "Warning!!! "
+                        "This release of Qubes OS is no longer supported!\n"
+                        "<b>See officially supported releases</b>"
+                    ),
+                    self.obsolete_dom0,
+                )
+            )
+
         if self.vms_needing_update:
             self.tray_menu.append(TextItem(_("<b>Qube updates available!</b>")))
             self.tray_menu.append(
@@ -110,7 +129,7 @@ def setup_menu(self):
                 )
             )
 
-        if self.obsolete_vms:
+        if self.obsolete_vms and self.obsolete_vms != {"dom0"}:
             self.tray_menu.append(
                 TextItem(_("<b>Some qubes are no longer supported!</b>"))
             )
@@ -224,6 +243,8 @@ def feature_change(self, vm, event, feature, **_kwargs):
         self.update_indicator_state()
 
     def update_indicator_state(self):
+        if "dom0" in self.obsolete_vms:
+            self.widget_icon.set_from_icon_name("qui-red-warn")
         if self.vms_needing_update or self.obsolete_vms:
             self.widget_icon.set_visible(True)
         else:

qui/tray/updates.py

@@ -302,6 +302,7 @@ gtk-update-icon-cache %{_datadir}/icons/Adwaita &>/dev/null || :
 /usr/share/icons/hicolor/scalable/apps/qui-domains-scalable.svg
 /usr/share/icons/hicolor/scalable/apps/qui-disk-space.svg
 /usr/share/icons/hicolor/scalable/apps/qui-disk-space-warn.svg
+/usr/share/icons/hicolor/scalable/apps/qui-red-warn.svg
 /usr/share/icons/hicolor/scalable/apps/qui-updates.svg
 /usr/share/icons/hicolor/scalable/apps/qui-updates-dark.svg
 /usr/share/icons/hicolor/scalable/apps/qui-updates-light.svg