Submanager uses wrong app instance

flask_script/__init__.py

@@ -146,6 +146,13 @@ def __call__(self, app=None, **kwargs):
 
         If your sub-Manager does not override this, any values for options will get lost.
         """
+        # If we have a parent, we are a sub-manager
+        if self.parent and self.app:
+            # call our own app and use the result if it's not None
+            res = self.app(app=app, **kwargs)
+            if res != None:
+                app = res
+
         if app is None:
             app = self.app
             if app is None:

tests.py

@@ -165,15 +165,20 @@ def __exit__(self, a,b,c):
         pass
 
 class AppForTesting(object):
+    name = "APP"
     def __init__(self, verbose=False):
         self.verbose = verbose
     def test_request_context(self):
         return EmptyContext()
     def __call__(self,**kw):
         if self.verbose:
-            print("APP "+" ".join("%s=%s" % (k,v) for k,v in kw.items()))
+            print("{} {}".format(self.name,
+                                 " ".join("%s=%s" % (k,v) for k,v in kw.items())))
         return self
 
+class SubAppForTesting(AppForTesting):
+    name = "SUB"
+
 
 class TestManager:
 
@@ -804,6 +809,25 @@ def test_submanager_separate_options(self, capsys):
         assert 'APP name_sub=MySubName' in out
         assert 'OK name=MyName' in out
 
+    def test_submanager_overrides_app(self, capsys):
+        def gen_app(app, **kwargs):
+            return SubAppForTesting(verbose=True)
+        sub_manager = Manager(gen_app, with_default_commands=False)
+        sub_manager.add_command('opt', CommandWithOptionalArg())
+        sub_manager.add_option('-n', '--name', dest='name_sub', required=False)
+
+        manager = Manager(AppForTesting(verbose=True), with_default_commands=False)
+        manager.add_command('sub_manager', sub_manager)
+        manager.add_option('-n', '--name', dest='name_main', required=False)
+
+        code = run('manage.py -n MyMainName sub_manager -n MySubName opt -n MyName', manager.run)
+        out, err = capsys.readouterr()
+        assert code == 0
+        assert 'APP name_main=MyMainName' in out
+        assert 'SUB name_sub=MySubName' in out
+        assert 'OK name=MyName' in out
+
+
     def test_manager_usage_with_submanager(self, capsys):
 
         sub_manager = Manager(usage='Example sub-manager')