copies: handle more cases where a file got replaced by a copy This patch fixes the changeset-centric version in a pretty straight-forward way. It fixes it to automatically resolve the conflict, which is better than resulting in a modify/delete conflict as it was before b4057d001760 (merge: when rename was made on both sides, use ancestor as merge base, 2020-01-22). I'll leave it for later to test and explicitly handle cases where files have been renamed to the same target on different sides of the merge. Differential Revision: https://phab.mercurial-scm.org/D8653

tests: test more cases where a file got replaced by a copy This adds a test where a file is modified on one branch and is renamed onto another file in another branch. That should ideally be automatically resolved (by propagating the modification to the rename destination). Alternatively, it could be considered a modify/delete conflict. It should at least not be automatically resolved by ignoring the modification. However, that is what actually happens with the changeset-centric algorithm since I broke it in b4057d001760 (merge: when rename was made on both sides, use ancestor as merge base, 2020-01-22). Before that commit, it resulted in a modify/delete conflict. The filelog-centric algorithm was broken already before that commit. Differential Revision: https://phab.mercurial-scm.org/D8652

unionrepo: don't insert index tuples with None as int field None is not a valid size. Use -1 as placeholder instead. This will be necessary when the index starts enforcing type correctness. Differential Revision: https://phab.mercurial-scm.org/D9161

bundlerepo: don't insert index tuples with full nodes as linkrev The index format has a documented format and latter changes will start to enforce the field types. The bundlerepo uses full nodes for the linkrev field when it should be using revision numbers. Use the link mapping to resolve them, except in the special case of self-references. Those are actually indications of a missing linkrev. Differential Revision: https://phab.mercurial-scm.org/D9160

rhg: add full node id support for `debugdata` command Unlike other later implemented commands `debugdata` only supported revision number. This changeset add full node id support for consistency with other commands. Differential Revision: https://phab.mercurial-scm.org/D9230

commit: warn the user when a commit already exists Sometimes, a commit will result in an exact match of a preexisting commit, and if that commit isn't a branch head, hg will incorrectly note that it created a new head. Instead, we should warn the user that commit already existed in the repository. In practice, this bug is rather uncommon, and will only occur when the usr explicitly sets the date. Please note that this commit contains an API change to cmdutil.commitstatus() Differential Revision: https://phab.mercurial-scm.org/D9257

revlog: don't cache parsed tuples in the C module A cached entry creates ~8 Python objects per cached changeset, which comes to around 200 Bytes per cached changeset on AMD64. Especially for operations that touch a lot of changesets, that can easily sum up to more than a 100MB of memory. Simple tests on large repositories show <2% runtime penalty for ripping out the cache, even for cache heavy operations like "hg log" for all revisions. Differential Revision: https://phab.mercurial-scm.org/D9155

fix: only check for obsolete commits in the --rev case With both `--all` and `--source`, we already exclude obsolete revisions in the revset, so there's no need to call `checkfixablectx()` in those cases. Differential Revision: https://phab.mercurial-scm.org/D9227

fix: don't include obsolete descendants with -s The `-s/--source` option is for regular users (`-r` is there for power users). If there are obsolete commits that are descendants of the given revision(s), then they almost definitely should just be left alone. That's what `hg rebase` does as well. So this patch makes it so we skip obsolete commits (including those in the input set itself). Differential Revision: https://phab.mercurial-scm.org/D9226

tests: add test showing how `hg fix -s` deals with obsolete and orphan nodes We didn't have any tests for how `hg fix -s` behaves with obsolete commits among the descendants. The next patch will change the behavior in this area. Differential Revision: https://phab.mercurial-scm.org/D9225