The gitea prerecieve and postrecieve hooks and the gitea PushUpdate function require that the PusherID and PusherName are real users. Previously, these environment variables were not being set when using a deploy key - the main result being that pushing to empty repositories meant that is_empty status was not changed.
I've also added an integration test to ensure that the is_empty status is updated on pushing with a deploy key.
There is a slight issue in that the deploy key is now considered a proxy for the owner - we don't have a way of separating out the deploy key from the owner at present. This can be fixed in another PR.
Fix#3795
Signed-off-by: Andrew Thornton art27@cantab.net
