Summary:
We are adding an option --base to define a starting point for a
new branch. We define --bookmark as the head of the branch (we
might introduce a --dest option in addition). This allows us to create
new branches for release branches and others.
Note that for some reason, `arc unit` is generating different test
results than running the run-test.py manually, causing branch updates in
different situations. Therefore we have to glob a bunch of tests.
Test Plan:
python ../../hg-crew/tests/run-tests.py test-p4fastimport-* test-check*
Reviewers: #mercurial, quark
Reviewed By: quark
Subscribers: quark, medson, mjpieters
Differential Revision: https://phabricator.intern.facebook.com/D5769328
Signature: 5769328:1504763221:78eb81f32ec46fc56619d77537c2b1944e938466
