change

SystemUpdater/UpdateManager.py

@@ -60,6 +60,17 @@ class UpdateManager():
         except Exception as e:
             logging.error(str(e))
 
+    #download only 2.0
+    def start_download(self, pkgs):
+        try:
+            if self.options.no_update_source is False:
+                self.dbusController._on_update_important_list()
+
+            update_backend = get_backend(self, InstallBackend.ACTION_DOWNLOADONLY)
+            update_backend.start(partial_upgrade_list = pkgs)
+        except Exception as e:
+            logging.error(str(e))
+
     #进行更新的操作
     def start_update(self):
         try:

SystemUpdater/backend/__init__.py

@@ -40,6 +40,7 @@ class InstallBackend():
     ACTION_INSTALL = 1
     ACTION_INSTALL_DEB = 2
     ACTION_CHECK_RESOLVER = 3
+    ACTION_DOWNLOADONLY = 4
 
     def __init__(self, window_main, action):
         self.window_main = window_main
@@ -121,6 +122,7 @@ class InstallBackend():
                 self.window_main.dbusController.UpdateDependResloveStatus(_success,is_remove_pkgs,pkgs_remove,raw_description,delete_desc,header,desc)
             else:
                 self.window_main.dbusController.DistupgradeDependResloveStatus(_success,is_remove_pkgs,pkgs_remove,raw_description,header,desc)
+        elif self.action == self.ACTION_DOWNLOADONLY:
         elif self.action == self.ACTION_UPDATE:
             self.is_updating = True
             self.update()