merge with stable

status: outputting structured unfinished-operation information This adds a new item in the json/template output for morestatus and added item types to all entries. Differential Revision: https://phab.mercurial-scm.org/D7595

chg: fix chg to work with py3.7+ "coercing" the locale When the environment is empty (specifically: it doesn't contain LC_ALL, LC_CTYPE, or LANG), Python will "coerce" the locale environment variables to be a UTF-8 capable one. It sets LC_CTYPE in the environment, and this breaks chg, since chg operates by: - start hg, using whatever environment the user has when chg starts - hg stores a hash of this "original" environment, but python has already set LC_CTYPE even though the user doesn't have it in their environment - chg calls setenv over the commandserver. This clears the environment inside of hg and sets it to be exactly what the environment in chg is (without LC_CTYPE). - chg calls validate to ensure that the environment hg is using (after the setenv call) is the one that the chg process has - if not, it is assumed the user changed their environment and we should use a different server. This will *never* be true in this situation because LC_CTYPE was removed. Differential Revision: https://phab.mercurial-scm.org/D7550

fuzz: add support for fuzzing under either Python 2 or 3 This was more of a hairball than I hoped, but it appears to work. The hg-py3 branch of my oss-fuzz fork on github has the remaining changes to switch us to Python 3, but we may as well retain Python 2 fuzzing support for at least a little while. Differential Revision: https://phab.mercurial-scm.org/D7592

phabricator: color the status in the "phabstatus" view I couldn't figure out strikethrough for "abandoned" like I've see with word diff. Differential Revision: https://phab.mercurial-scm.org/D7608

phabricator: add the "Changes Planned" status name I noticed this when coloring the status output. But it looks like status names are also used in the pseudo revset language as well, and abort when parsing a name not in this list. Differential Revision: https://phab.mercurial-scm.org/D7607

fuzz: fix mpatch_corpus to not have an overridden __repr__ on py3 Differential Revision: https://phab.mercurial-scm.org/D7606

formatting: fix some recent formatting regressions Differential Revision: https://phab.mercurial-scm.org/D7605

remotefilelog: remove the `ensurestart` usage The option does not seems to do what we want since it does not wait on the background process actually starting (eg: taking the lock). And the race have been dealt with another way anyway. This effectively back out changeset 2c74337e6483. Differential Revision: https://phab.mercurial-scm.org/D7590

remotefilelog: remove most of the debugwait* command in the tests Since we use a dedicated developer config, we do not need them anymore. Differential Revision: https://phab.mercurial-scm.org/D7589

remotefilelog: use the correct redirection in tests The test were using '2>%1' which just redirect stderr in the "%1" file. The intend was '2>&1' which redirect stderr on stdin. This impact tests because some commit were picking up this '%1' files. Differential Revision: https://phab.mercurial-scm.org/D7588

remotefilelog: remove most sleep in tests Now that we removed most of the races, we can remove the infamous sleeps. Differential Revision: https://phab.mercurial-scm.org/D7587

remotefilelog: have command wait for background task in the tests We leverage the feature introduced in the two previous commit to have the main command wait for the background task to be finished before returning. All test still pass and instability seems to have gone away. Most of the sleep and explicit wait are now useless and will be cleaned up in later changesets. Differential Revision: https://phab.mercurial-scm.org/D7586

remotefilelog: add a developer option to wait for background processes In order to block the main command on the subprocess exiting, we ensure the repo's ui object will call the subprocess.wait() method to ensure the top-level hg process doesn't exit until all background processes have also done so. Currently, in the tests, most operation spawning background process as followed by commands waiting for these operations to complete. However this waiting is racy. First because it seems like we can start waiting before the background operation actually start, in which case it is prematurely detected as "done". Second, because some commands may spawn multiple background operation for the same operation (eg: rebase can apparently trigger multiple prefetch). The current approach could be updated to maybe handle the first issue, but the second one will never be properly handled. In most case, we do not care that the bg process keep running after the command end. (Since we explicitly wait for them to end before doing anything else). So we add an option to wait on the background process before exiting the command. We'll put it in use in the next changeset. Differential Revision: https://phab.mercurial-scm.org/D7585

procutil: add a option to not fully detach background process When writing test, it is useful to make code pretending to spawn a fully detached process while still actually waiting for it to finish. We add the option to `procutil.runbgcommand`, to do so. We will use this in remote-filelog tests. Differential Revision: https://phab.mercurial-scm.org/D7584

cext-revlog: fixed __delitem__ for uninitialized nodetree This is a bug in a code path that's seldom used, because in practice (at least in the whole test suite), calls to `del index[i:j]` currently just don't happen before the nodetree has been initialized. However, in our current work to replace the nodetree by a Rust implementation, this is of course systematic. In `index_slice_del()`, if the slice start is smaller than `self->length`, the whole of `self->added` has to be cleared. Before this change, the clearing was done only by the call to `index_invalidate_added(self, 0)`, that happens only for initialized nodetrees. Hence the removal was effective only from `start` to `self->length`. The consequence is index corruption, with bogus results in subsequent calls, and in particular errors such as `ValueError("parent out of range")`, due to the fact that parents of entries in `self->added` are now just invalid. This is detected by the rebase tests, under conditions that the nodetree of revlog.c is never initialized. The provided specific test is more direct. Differential Revision: https://phab.mercurial-scm.org/D7603

filemerge: fix a missing attribute usage Flagged by both pytype and VSCode. Differential Revision: https://phab.mercurial-scm.org/D7465

filemerge: drop a default argument to appease pytype The function slices and takes the length of this argument without internally setting it if not provided. There was no bug here because both callers passed the argument. Differential Revision: https://phab.mercurial-scm.org/D7464

fuzz: add a seed corpus for the dirs fuzzer I was hoping to trigger an asan violation under Python 3 that some internal tests at Google found, but for some reason that's beyond me I can't seem to manage. Differential Revision: https://phab.mercurial-scm.org/D7600

fuzz: clean up production of seed corpora This was getting out of hand. Differential Revision: https://phab.mercurial-scm.org/D7599

status: add template/json data about whether a file has unresolved conflicts Differential Revision: https://phab.mercurial-scm.org/D7594

status: split morestatus data loading from display This is a small refactoring in preparation for adding more morestatus functionality (notably for templated/JSON output) - the goal is to use the data inside the status display loop, as well as output the overall state in a templatable/structured way. Differential Revision: https://phab.mercurial-scm.org/D7593

phabricator: add a "phabstatus" template keyword We add a "phabstatus" template keyword, returning an object with "url" and "status" keys. This is quite similar to "phabreview" template keyword, but it queries phabricator for each specified revision so it's going to be slow (as compared to the "phabstatus" show view from previous changeset). Differential Revision: https://phab.mercurial-scm.org/D7507

phabricator: add a "phabstatus" show view We add a "phabstatus" show view (called as "hg show phabstatus") which renders a dag with underway revisions associated with a differential revision and displays their status. The revisions shown is a subset of that shown by "work" view, only including revisions with known by Phabricator. Differential Revision: https://phab.mercurial-scm.org/D7506

dirs: fix out-of-bounds access in Py3 The hack for mutating Python's variable-length integers that was ported to py3 in cb3048746dae (dirs: port PyInt code to work on Python 3, 2016-10-08) was reading from ob_digit[1] instead of ob_digit[0] for some reason. Space for ob_digit[1] would only be allocated for integers larger than 30 bits, so we ended up writing to unallocated memory. Also, we would write an integer that's 2^30 times too large, so we would never free these integers. Found by AddressSanitizer. Differential Revision: https://phab.mercurial-scm.org/D7597

manifestcache: add some test involving shares Some issue around shares have been reported. I am adding tests to better cover the share case. The test show that the code behave as expected so far. Differential Revision: https://phab.mercurial-scm.org/D7602

fuzz: fix test-fuzz-targets.t to run with python3 Differential Revision: https://phab.mercurial-scm.org/D7601

py3: fix a bytes vs str issue in remotefilelog extension Differential Revision: https://phab.mercurial-scm.org/D7598

rust-matchers: add doctests for `AlwaysMatcher` Differential Revision: https://phab.mercurial-scm.org/D7527

rust-hg-path: add method to get part of a path relative to a prefix This will be used in the next patch in this series. Differential Revision: https://phab.mercurial-scm.org/D7526

rust-matchers: improve `Matcher` trait ergonomics `VisitChildrenSet` has no need to own the set, this will save allocations. The `file_set` return type change is motivated by both ergonomics and... being able to compile code. The `AlwaysMatcher` does not store a `file_set`, which requires it to return an owned `HashSet`, which in turn would change our return type to `Cow<&HgPath>` (lifetimes omitted). This is both un-ergonomic and troublesome for more complex lifetime issues (especially with the upcoming `FileMatcher` in the following patch). Differential Revision: https://phab.mercurial-scm.org/D7525

rust-dirs-multiset: use `AsRef` instead of concrete types when possible I also renamed `vec` to `dirstate`, because it was not a great name. Differential Revision: https://phab.mercurial-scm.org/D7524