...

src/calibre/gui2/dialogs/plugin_updater.py

@@ -32,7 +32,7 @@ FILTER_INSTALLED = 1
 FILTER_UPDATE_AVAILABLE = 2
 FILTER_NOT_INSTALLED = 3
 
-def get_plugin_updates_available():
+def get_plugin_updates_available(raise_error=False):
     '''
     API exposed to read whether there are updates available for any
     of the installed user plugins.
@@ -41,7 +41,7 @@ def get_plugin_updates_available():
     '''
     if not has_external_plugins():
         return None
-    display_plugins = read_available_plugins()
+    display_plugins = read_available_plugins(raise_error=raise_error)
     if display_plugins:
         update_plugins = filter(filter_upgradeable_plugins, display_plugins)
         if len(update_plugins) > 0:
@@ -54,7 +54,7 @@ def filter_upgradeable_plugins(display_plugin):
 def filter_not_installed_plugins(display_plugin):
     return not display_plugin.is_installed()
 
-def read_available_plugins():
+def read_available_plugins(raise_error=False):
     display_plugins = []
     br = browser()
     br.set_handle_gzip(True)
@@ -63,6 +63,8 @@ def read_available_plugins():
         if not raw:
             return
     except:
+        if raise_error:
+            raise
         traceback.print_exc()
         return
     raw = raw.decode('utf-8', errors='replace')

src/calibre/gui2/update.py

@@ -48,7 +48,7 @@ class CheckForUpdates(QThread):
             except Exception as e:
                 prints('Failed to check for calibre update:', as_unicode(e))
             try:
-                update_plugins = get_plugin_updates_available()
+                update_plugins = get_plugin_updates_available(raise_error=True)
                 if update_plugins is not None:
                     plugins_update_found = len(update_plugins)
             except Exception as e: