[IMP] runbot_merge: add support for draft check

1cea247e6c missed the update of the
`draft` flag, add support for it.

Fixes #753

runbot_merge/models/pull_requests.py

@@ -143,10 +143,17 @@ All substitutions are tentatively applied sequentially to the input.
                 },
                 'sender': {'login': self.project_id.github_prefix},
             })
+            edit2 = ''
+            if pr_id.draft != pr['draft']:
+                edit2 = controllers.handle_pr(self.env, {
+                    'action': 'converted_to_draft' if pr['draft'] else 'ready_for_review',
+                    'pull_request': pr,
+                    'sender': {'login': self.project_id.github_prefix}
+                }) + '. '
             feedback({
                 'repository': pr_id.repository.id,
                 'pull_request': number,
-                'message': f"{edit}. {sync}.",
+                'message': f"{edit}. {edit2}{sync}.",
             })
             return
 

runbot_merge/tests/test_basic.py

@@ -2520,6 +2520,7 @@ Please check and re-approve.
             'state': 'ready',
             'message': "Something else",
             'target': other.id,
+            'draft': True,
         })
         with repo:
             pr.post_comment('hansen check')
@@ -2528,7 +2529,11 @@ Please check and re-approve.
         assert pr_id.head == c2
         assert pr_id.message == 'title\n\nbody' # the commit's message was used for the PR
         assert pr_id.target.name == 'master'
-        assert pr.comments[-1] == (users['user'], f"Updated target, squash, message. Updated to {c2}.")
+        assert not pr_id.draft
+        assert pr.comments[-1] == (
+            users['user'],
+            f"Updated target, squash, message. Updated {pr_id.display_name} to ready. Updated to {c2}."
+        )
 
     def test_update_closed(self, env, repo):
         with repo: