revlog: split revlog v1 and revlog v2 handling Explicitly splitting their fields packing and unpacking makes it easier to extend the existing C implemenation to handle the new changelog format, whose fields and offsets are not simply a superset of the revlog. Differential Revision: https://phab.mercurial-scm.org/D12137

revlog: extract entry byte offsets into named constants Labelling the fields pointed by the given offsets shared by revlog v1 and v2. Differential Revision: https://phab.mercurial-scm.org/D12136

doc: inspect.getargspec has been removed in Python 3.11 Fixed by dropping the inspection introduced in cdda48c93676. The 2nd "reporter" parameter to docutils.languages.get_language has been available since 0.8 more than 10 years ago. Reported for Fedora on https://bugzilla.redhat.com/show_bug.cgi?id=2022252#c2 .

branchmap: split a long condition in branchcache.validfor(), add comments Differential Revision: https://phab.mercurial-scm.org/D12138

branchmap: don't add branch entries if there are no heads We definitely don't want any empty entries to be present in repo.branchmap() just for the sake of not breaking test-notify.t. No test changes required because the previous patch made notify extension to not raise any tracebacks in case of RepoLookupErrors. Differential Revision: https://phab.mercurial-scm.org/D12135

notify: don't produce errors if a revision is not found Notify extension has a way to only subscribe to a specific revset, such as "branch(foo)". Before this patch, when there was no branch with that name, it would produce a traceback saying "unknown revision: foo". With this patch it would no longer do that, and instead it'll assume there are no revisions that match this revset. I think this patch is an improvement in general, but there's a reason I'm sending it now. test-notify.t has a test case where it obsoletes the only revision on a branch, and previously that wouldn't produce any complications, because head computation wasn't obsolescence-aware. Now if the only revision on a branch is obsolete, repo should not see that branch at all. That branch will still be present in branchcache (with an empty list of revisions) until the next patch. Differential Revision: https://phab.mercurial-scm.org/D12134