change VercodeOperation to TYPE_LIST

fdroidserver/checkupdates.py

@@ -456,13 +456,9 @@ def checkupdates_app(app):
         raise FDroidException(_('no version information found'))
 
     if app.VercodeOperation:
-        if isinstance(app.VercodeOperation, str):
-            vercodes = [operate_vercode(app.VercodeOperation, vercode)]
-        else:
-            vercodes = sorted([
-                operate_vercode(operation, vercode)
-                for operation in app.VercodeOperation
-            ])
+        vercodes = sorted([
+            operate_vercode(operation, vercode) for operation in app.VercodeOperation
+        ])
     else:
         vercodes = [vercode]
 

fdroidserver/lint.py

@@ -264,13 +264,8 @@ def check_update_check_data_url(app):  # noqa: D403
 def check_vercode_operation(app):
     if not app.VercodeOperation:
         return
-    ops = (
-        [app.VercodeOperation]
-        if isinstance(app.VercodeOperation, str)
-        else app.VercodeOperation
-    )
     invalid_ops = []
-    for op in ops:
+    for op in app.VercodeOperation:
         if not common.VERCODE_OPERATION_RE.match(op):
             invalid_ops += op
     if invalid_ops:

fdroidserver/metadata.py

@@ -153,7 +153,7 @@ class App(dict):
         self.AutoUpdateMode = 'None'
         self.UpdateCheckMode = 'None'
         self.UpdateCheckIgnore = None
-        self.VercodeOperation = None
+        self.VercodeOperation = []
         self.UpdateCheckName = None
         self.UpdateCheckData = None
         self.CurrentVersion = ''
@@ -204,6 +204,7 @@ fieldtypes = {
     'AntiFeatures': TYPE_LIST,
     'AllowedAPKSigningKeys': TYPE_LIST,
     'Builds': TYPE_BUILD,
+    'VercodeOperation': TYPE_LIST,
     'CurrentVersionCode': TYPE_INT,
 }