fix[#23] detect failure and report to user

vanilla_sideload/views/install.py

@@ -161,8 +161,7 @@ def on_response(dialog: Adw.MessageDialog, response: Text) -> None:
     def on_vte_child_exited(
         self, console: Vte.Terminal, status: int, *args: Any
     ) -> None:
-        if not bool(status):
-            self.emit("done", True)
+        self.emit("done", bool(status))
 
     def __on_console_clicked(self, btn: Gtk.Button) -> None:
         status: bool = not self.box_console_main.get_visible()

vanilla_sideload/window.py

@@ -92,8 +92,13 @@ def __build_install_ui(self) -> None:
         self.bin_main.set_child(self.view_install)
 
     def __on_install_done(self, view_install: SideloaderInstall, *args: Any) -> None:
+        success = args[0]
         view_install_done = SideloaderInstallDone(self.__pkg.name)
         view_install_done.btn_logs.connect("clicked", self.__on_view_logs)
+        if not success:
+            view_install_done.status.set_title(_("Installation Failed"))
+            view_install_done.status.set_description(_("The package installation was unsuccessful"))
+            # view_install_done.set_icon(Gtk.Image.new_from_icon_name("dialog-error-symbolic", Gtk.IconSize.LARGE))
         self.bin_main.set_child(view_install_done)
 
     def __build_uninstall_ui(self) -> None: