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

fix: suggest --source instead of --rev on empty revset `--source` is the recommended flag for regular users (`--rev` is available for advanced users). Differential Revision: https://phab.mercurial-scm.org/D9224