exchange: check actually missing revs for obsolete / unstable revs (issue6372) The previous code was using `outgoing.ancestorsof`, which was originally called `outgoing.missingheads` although not containing the missing heads. This confusion was probably the reason why the buggy code was written. The actually outgoing changesets are stored in `outgoing.missing`. By checking all outgoing changesets, we avoid the problem and can show the list of all obsolete or unstable changesets, which is more helpful for the user.

tests: test that push doesn’t complain about unstable changesets if no changes When there’re no outgoing changes, push doesn’t complain about unstable changesets. There is currently a bug (see issue6372) that causes that there is an abort on push when the outgoing changes contain another changeset even if that is not obsolete or unstable. A test case and fix for that is sent in the next patch.

diff: move no-eol text constant to a common location Differential Revision: https://phab.mercurial-scm.org/D8763

revert: fix interactive reverting of end-of-file newline changes The chunk reversal used by `revert -i` in Curses mode was not taking this case into account. Differential Revision: https://phab.mercurial-scm.org/D8762

phabricator: clarify the multiple heads/roots error message for phabsend As pointed out in followup feedback for c1c922391314, it's confusing to say there are multiple items and then only list one. Differential Revision: https://phab.mercurial-scm.org/D8761

error: normalize "unresolved conflicts" error messages with a custom class Differential Revision: https://phab.mercurial-scm.org/D8713

error: unify the error message formats for 'rebase' and 'unshelve' Differential Revision: https://phab.mercurial-scm.org/D8730

debugcommands: create new debugantivirusrunning command This writes the EICAR test file to .hg/cache, in an attempt to trigger an AV scanner's scanning engine. This should let us (in theory) detect some cases when a user's slowness is a result of AV scanning. Differential Revision: https://phab.mercurial-scm.org/D8353

windows: always work around EINVAL in case of broken pipe for stdout / stderr In 29a905fe23ae, I missed the fact that the `winstdout` class works around two unrelated bugs (size limit when writing to consoles and EINVAL in case of broken pipe) and that the latter bug happens even when no console is involved. When writing a test for this, I realized that the same problem applies to stderr, so I applied the workaround for EINVAL to both stdout and stderr. The size limit is worked around in the same case as before (consoles on Windows on Python 2). For that, I changed the `winstdout` class.

tests: make pipes / PTYs non-inheritable in test-stdio.py A following patch requires that to test closing the receiving end of the pipe / PTYs. Even for existing tests, it might be safer to make the lifetime of the pipes / PTYs as short as possible.

util: enhance `nullcontextmanager` to be able to return __enter__ result This makes its functionality and signature equivalent to Python 3.7’s contextlib.nullcontext().

windows: augment docstring of `winstdout` class

discovery: change users of `outgoing.missingheads` to `outgoing.ancestorsof` The attribute `missingheads` was recently renamed to `ancestorsof`, as it, despite the old name, doesn’t contain the missing heads but the changesets that were requested (including ancestors) for the outgoing operation. Changing all the users enables to print a warning if the old name is used. There is a good chance that some of the users are buggy because of the old name. Changing them to use the new name makes it more obvious that they are buggy. All users need to be reviewed for bugs. When sending patches for fixing them, the change will be more obvious without having to explain again and again the discrepancy of the old attribute name and what it actually contained.

discovery: fix docstring of `outgoing` class Also, introduce a more correct name `ancestorsof` for what was named `missingheads` before. For now, we just forward `ancestorsof` to `missingheads` until all users are changed. There were some mistakes in the old docstring / name: * `missingheads` (new name: `ancestorsof`) contains the revs whose ancestors are included in the outgoing operation. It may contain non-head revs and revs which are already on the remote, so the name "missingheads" is wrong in two ways. * `missing` contains only ancestors of `missingheads`, so not *all nodes* present in local but not in remote. * `common` might not contain all common revs, e.g. not some that are not an ancestor of `missingheads`. It seems like the misleading name have fostered an actual bug (issue6372), where `outgoing.missingheads` was used assuming that it contains the heads of the missing changesets.

discovery: weaken claim about returned common heads if ancestorsof are given As the test case shows, the claim is not true in general.

cext: remove unused variables Differential Revision: https://phab.mercurial-scm.org/D8760

phabupdate: allow resigning from revisions Differential Revision: https://phab.mercurial-scm.org/D8756

phabupdate: allow revisions to be commandeered Differential Revision: https://phab.mercurial-scm.org/D8755

phabupdate: allow revisions to be reopened Differential Revision: https://phab.mercurial-scm.org/D8754

phabupdate: allow revisions to be marked "closed" (Yes, the transaction name and final state in the comment here do differ.) Differential Revision: https://phab.mercurial-scm.org/D8753

phabupdate: allows revisions to be marked "request-review" Differential Revision: https://phab.mercurial-scm.org/D8752

phabupdate: allow revisions to be marked with "plan changes" Differential Revision: https://phab.mercurial-scm.org/D8751

status: match category text in the option description The ! category in the main status help text is defined as "missing", so use the same text for the help text of --delete. Differential Revision: https://phab.mercurial-scm.org/D8759

purge: classify as a "working directory management" command in help It seems to me that `hg purge` is clearly a "working directory management" command and not a "repository management" command. The working copy is all that's affected, after all; the repo is not affected at all. Differential Revision: https://phab.mercurial-scm.org/D8757

extensions: make `hg help extensions` list disabled extensions with PyOxidizer `setup.py` has a mechanism for generating a list of bundled extensions and their documenation and putting it in a `hgext/__index__.py` file. That file is then read from `extensions.py`, which makes `hg help extensions` work in py2exe binaries. This patch makes it so `setup.py` produces the `hgext/__index__.py` file also when called by PyOxidizer. Thanks to Matt Harbison for pointing out the existence of `__index__.py`! Differential Revision: https://phab.mercurial-scm.org/D8758

phases: sparsify phaseroots and phasesets As final step of dealing with the holes in the phase numbers, make phaseroots and phasesets both dictionaries indexed by the phase number. Further adjust the interface of the C module by pushing the node to revision mapping down as it is cheaper on the C side to deal with revision numbers. Overall, the patch series improves a no-change "hg up" for my NetBSD test repository from 4.7s to 1.3s. Differential Revision: https://phab.mercurial-scm.org/D8698

extdiff: add some comments in diffrevs() It was not obvious to understand the code so I added some comments. Differential Revision: https://phab.mercurial-scm.org/D8690

extdiff: add comments and minor variable renames diffpatch() Some variable names were now confusing as we refactored the code in a separate function. For example, `node1a` leads to ideas why `1a` and not `1`. The variable storing path to patch file was named as `dirX` instead of `fileX`. Renamed these variables and added couple of comments. Differential Revision: https://phab.mercurial-scm.org/D8689

extdiff: remove unrequired do3way argument to diffpatch() When we are diffing patches, there is no 3 way diff. Differential Revision: https://phab.mercurial-scm.org/D8688

extdiff: refactor logic to diff revs of versions of files Now that code for both cases, diffing patches or files is in separate function, it will be better to refactor them more and understand. Differential Revision: https://phab.mercurial-scm.org/D8687