zeripath 3c531d3957 When updating by rebase we need to set the environment for head repo (#22535) (#22536)
Backport #22535

The update by rebase code reuses the merge code but shortcircuits and
pushes back up to the head. However, it doesn't set the correct pushing
environment - and just uses the same environment as the base repo. This
leads to the push update failing and thence the PR becomes out-of-sync
with the head.

This PR fixes this and adjusts the trace logging elsewhere to help make
this clearer.

Fix #18802

Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>
2023-01-19 17:31:20 -05:00
..