transaction: quietly rollback if no other changes than temporary files
If no actual change have been made, we don't really need to roll them back. We
only have to cleanup some temporary files and it seems reasonable to do that
quietly.
This will help us to use the transaction in wider context¹ without impacting the
user experience.
[1] as in Python context managers that lives longer.
# Extension to write out fake unsupported records into the merge state
#
#
from mercurial import (
mergestate as mergestatemod,
registrar,
)
cmdtable = {}
command = registrar.command(cmdtable)
@command(
b'fakemergerecord',
[
(b'X', b'mandatory', None, b'add a fake mandatory record'),
(b'x', b'advisory', None, b'add a fake advisory record'),
],
'',
)
def fakemergerecord(ui, repo, *pats, **opts):
with repo.wlock():
ms = mergestatemod.mergestate.read(repo)
records = ms._makerecords()
if opts.get('mandatory'):
records.append((b'X', b'mandatory record'))
if opts.get('advisory'):
records.append((b'x', b'advisory record'))
ms._writerecords(records)