Automatically delete head branches option makes ghstack land fail about ghstack HOT 4 CLOSED

It seems like you could potentially use git ls-remote --head origin <branch name> to check for the existence before issuing the delete command. Im not sure if its possible to tell git to "keep going" if it encounters a non-existent branch, but that would be preferable imo.

from ghstack.

Sounds reasonable. Another quick and dirty fix would just be to suppress all errors from the delete branch command.

from ghstack.

If we suppress errors it still means we have lingering branches (if one branch doesnt exist, none of them get deleted it seems), unless you have a way in git to suppress the error but continue with the deletions?

from ghstack.

I wasn't too familiar with Git's semantics here. But we could always issue the deletions individually and/or decide we don't care (it's not the end of the world if we fail to delete the branch)

from ghstack.