Show a warning if using the Flatpak on Ubuntu

data/io.github.kolunmi.Bazaar.gschema.xml

@@ -65,5 +65,10 @@
       <summary>Show Permission Warning Banner</summary>
       <description>Show a warning banner on the permissions page</description>
     </key>
+    <key name="check-for-ubuntu" type="b">
+      <default>true</default>
+      <summary>Check For Ubuntu</summary>
+      <description>Whether to check for and warn about Ubuntu's broken apparmor permissions on startup</description>
+    </key>
   </schema>
 </schemalist>

src/bz-application.c

@@ -990,6 +990,72 @@ init_fiber (GWeakRef *wr)
 
   bz_weak_get_or_return_reject (self, wr);
 
+/* Here until Ubuntu fixes its apparmor crap. */
+#ifdef SANDBOXED_LIBFLATPAK
+  if (g_settings_get_boolean (self->settings, "check-for-ubuntu"))
+    {
+      g_autoptr (GSubprocessLauncher) os_check_launcher = NULL;
+      g_autoptr (GSubprocess) os_check                  = NULL;
+      g_autoptr (GError) os_check_error                 = NULL;
+      gboolean      os_check_result                     = FALSE;
+      GInputStream *os_check_stdout_pipe                = NULL;
+      g_autoptr (GBytes) os_out                         = NULL;
+
+      os_check_launcher = g_subprocess_launcher_new (G_SUBPROCESS_FLAGS_STDOUT_PIPE);
+      os_check          = g_subprocess_launcher_spawn (os_check_launcher, &os_check_error,
+                                                       "flatpak-spawn", "--host", "cat", "/usr/lib/os-release", NULL);
+
+      if (os_check != NULL)
+        {
+          os_check_result = dex_await (dex_subprocess_wait_check (os_check), &os_check_error);
+          if (os_check_result)
+            {
+              os_check_stdout_pipe = g_subprocess_get_stdout_pipe (os_check);
+              os_out               = g_input_stream_read_bytes (os_check_stdout_pipe, 4096, NULL, &os_check_error);
+            }
+          else
+            g_warning ("Ubuntu check subprocess failed: %s", os_check_error->message);
+        }
+      else
+        g_warning ("Failed to spawn ubuntu check subprocess: %s", os_check_error->message);
+
+      if (os_out != NULL &&
+          strstr (g_bytes_get_data (os_out, NULL), "ID=ubuntu") != NULL)
+        {
+          GtkWindow       *window   = NULL;
+          AdwDialog       *alert    = NULL;
+          g_autofree char *response = NULL;
+
+          dex_await (dex_ref (DEX_FUTURE (self->first_window_opened)), NULL);
+
+          window = gtk_application_get_active_window (GTK_APPLICATION (self));
+          if (window == NULL)
+            window = new_window (self);
+
+          alert = adw_alert_dialog_new (NULL, NULL);
+          adw_alert_dialog_format_heading (ADW_ALERT_DIALOG (alert), _ ("Ubuntu Troubles!"));
+          adw_alert_dialog_format_body_markup (
+              ADW_ALERT_DIALOG (alert),
+              _ ("The more recent versions of Ubuntu have messed up default security rules, "
+                 "making it <b>impossible to install apps</b> from the Flatpak version "
+                 "of Bazaar, please just use the normal package for now by using\n\n"
+                 "<tt>sudo apt install bazaar</tt>\n\n"
+                 "You can then remove this Flatpak version with\n\n"
+                 "<tt>flatpak uninstall io.github.kolunmi.Bazaar</tt>"));
+          adw_alert_dialog_add_response (ADW_ALERT_DIALOG (alert), "ok", _ ("Continue Anyway"));
+          adw_alert_dialog_set_default_response (ADW_ALERT_DIALOG (alert), "ok");
+          adw_alert_dialog_set_close_response (ADW_ALERT_DIALOG (alert), "ok");
+
+          adw_dialog_present (alert, GTK_WIDGET (window));
+          response = dex_await_string (bz_make_alert_dialog_future (ADW_ALERT_DIALOG (alert)), NULL);
+
+          g_settings_set_boolean (self->settings, "check-for-ubuntu", FALSE);
+        }
+      else
+        g_settings_set_boolean (self->settings, "check-for-ubuntu", FALSE);
+    }
+#endif
+
   bz_state_info_set_online (self->state, TRUE);
   bz_state_info_set_busy (self->state, TRUE);
   bz_state_info_set_background_task_label (self->state, _ ("Performing setup…"));