graphlog: use '%' for other context in merge conflict This lets the user more easily find the commit that is involved in the conflict, such as the source of `hg update -m` or the commit being grafted by `hg graft`. Differential Revision: https://phab.mercurial-scm.org/D8043

tests: add `hg log -G` output when there are merge conflicts The next commit will change the behavior for these. I've used slightly different commands in the different tests to match the surrounding style. Differential Revision: https://phab.mercurial-scm.org/D8042

revset: add a revset for parents in merge state This may be particularly useful soon, when I'm going to change how `hg rebase` sets its parents during conflict resolution. Differential Revision: https://phab.mercurial-scm.org/D8041

tests: add test of rebase with conflict in merge commit It doesn't seem like we had any tests of this. I think it's pretty weird that the two parents we're merging are not the working copy parents during the conflict resolution. Differential Revision: https://phab.mercurial-scm.org/D7824

rebase: always be graft-like, not merge-like, also for merges Rebase works by updating to a commit and then grafting changes on top. However, before this patch, it would actually merge in changes instead of grafting them in in some cases. That is, it would use the common ancestor as base instead of using one of the parents. That seems wrong to me, so I'm changing it so `defineparents()` always returns a value for `base`. This fixes the bad behavior in test-rebase-newancestor.t, which was introduced in 65f215ea3e8e (tests: add test for rebasing merges with ancestors of the rebase destination, 2014-11-30). The difference in test-rebase-dest.t is because the files in the tip revision were A, D, E, F before this patch and A, D, F, G after it. I think both files should ideally be there. Differential Revision: https://phab.mercurial-scm.org/D7907

nodemap: update the index with the newly written data (when appropriate) If we are to use mmap to read the nodemap data, and if the python code is responsible for the IO, we need to refresh the mmap after each write and provide it back to the index. We start this dance without the mmap first. Differential Revision: https://phab.mercurial-scm.org/D7893

nodemap: never read more than the expected data amount Since we are tracking this number we can use it to detect corrupted rawdata file and to only read the correct amount of data when possible. Differential Revision: https://phab.mercurial-scm.org/D7892

nodemap: write new data from the expected current data length If the amount of data in the file exceed the expect amount, we will overwrite the extra data. This is a simple way to be safer. Differential Revision: https://phab.mercurial-scm.org/D7891

nodemap: double check the source docket when doing incremental update In theory, the index will have the information we expect it to have. However by security, it seems safer to double check that the incremental data are generated from the data currently on disk. Differential Revision: https://phab.mercurial-scm.org/D7890

nodemap: track the total and unused amount of data in the rawdata file We need to keep that information around: * total data will allow transaction to start appending new information without confusing other reader. * unused data will allow to detect when we should regenerate new rawdata file. Differential Revision: https://phab.mercurial-scm.org/D7889

nodemap: track the maximum revision tracked in the nodemap We need a simple way to detect when the on disk data contains less revision than the index we read from disk. The docket file is meant for this, we just had to start tracking that data. We should also try to detect strip operation, but we will deal with this in later changesets. Right now we are focusing on defining the API for index supporting persistent nodemap. Differential Revision: https://phab.mercurial-scm.org/D7888

nodemap: add a flag to dump the details of the docket We are about to add more information to the docket. We first introduce a way to debug its content. Differential Revision: https://phab.mercurial-scm.org/D7887

nodemap: introduce append-only incremental update of the persistent data Rewriting the full nodemap for each transaction has a cost we would like to avoid. We introduce a new way to write persistent nodemap data by adding new information at the end for file. Any new and updated block as added at the end of the file. The last block is the new root node. With this method, some of the block already on disk get "dereferenced" and become dead data. In later changesets, We'll start tracking the amount of dead data to eventually re-generate a full nodemap. Differential Revision: https://phab.mercurial-scm.org/D7886

shelve: fix ordering of merge labels Differential Revision: https://phab.mercurial-scm.org/D8140

shelve: add test clearly demonstrating that the conflict labels are backwards Differential Revision: https://phab.mercurial-scm.org/D8139

import: don't ignore `--secret` when `--bypass` is specified Differential Revision: https://phab.mercurial-scm.org/D8126

phabricator: fix a phabsend crash when processing a renamed binary This was a trivial fix, and some more tests are added to cover binary files. Since the old filecontext is passed in, the old name is still available. But I noticed some weirdness around what it marked as binary and not, and what is viewable in Phabricator. Those things have been flagged, and will probably take some digging. Differential Revision: https://phab.mercurial-scm.org/D8133

test: pin the number of CPU for issue4074 tests On machine with an hundreds of CPUs, the "user" CPU time reported can be inflated by the status steps. Since the test especially focus on the diff computation, we restrict the number of CPU to avoid potential issues. Differential Revision: https://phab.mercurial-scm.org/D8112

rust-dirstatemap: add `NonNormalEntries` class This fix introduces the same encapsulation as the `copymap`. There is no easy way of doing this any better for now. `hg up -r null && time HGRCPATH= HGMODULEPOLICY=rust+c hg up tip` on Mozilla Central, (not super recent, but it doesn't matter): Before: 7:44,08 total After: 1:03,23 total Pretty brutal regression! This is a graft on stable of cf1f8660e568 Differential Revision: https://phab.mercurial-scm.org/D8111

rust-dirstatemap: cache non normal and other parent set Performance of `hg update` was significantly worse since the introduction of the Rust `dirstatemap`. This regression was noticed by Valentin Gatien-Baron when working on a large repository, as it goes unnoticed for smaller repositories like Mercurial itself. This fix introduces the same getter/setter mechanism at `hg-core` level as for `set/get_dirs`. While this technique is, as previously discussed, quite suboptimal, it fixes an important enough problem. Refactoring `hg-core` to use the typestate pattern could be a good approach to improving code quality in a future patch. This is a graft of stable of 83b2b829c94e Differential Revision: https://phab.mercurial-scm.org/D8110

chgserver: spawn new process if schemes change The schemes extension updates hg.schemes table. It's technically possible for hg.repository() to look for e.g. ui.schemes instead of depending on module-local table, but I don't think the change would make much sense since [schemes] is usually specified in ~/.hgrc and thus it can be considered static data.

tests: accept new bzr message about switching branches The new version apparently prints "Switched to branch at " instead of "Switched to branch: ". Differential Revision: https://phab.mercurial-scm.org/D8106

nodemap: keep track of the docket for loaded data To perform incremental update of the on disk data, we need to keep tracks of some aspect of that data. Differential Revision: https://phab.mercurial-scm.org/D7885

nodemap: introduce an explicit class/object for the docket We are about to add more information to this docket, having a clear location to stock them in memory will help. Differential Revision: https://phab.mercurial-scm.org/D7884

nodemap: keep track of the ondisk id of nodemap blocks If we are to incrementally update the files, we need to keep some details about the data we read. Differential Revision: https://phab.mercurial-scm.org/D7883

nodemap: provide the on disk data to indexes who support it Time to start defining the API and prepare the rust index support. We provide a method to do so. We use a distinct method instead of passing them in the constructor because we will need this method anyway later (to refresh the mmap once we update the data on disk). Differential Revision: https://phab.mercurial-scm.org/D7847

nodemap: all check that revision and nodes match in the nodemap More check is always useful. Differential Revision: https://phab.mercurial-scm.org/D7846

nodemap: add basic checking of the on disk nodemap content The simplest check it so verify we have all the revision we needs, and nothing more. Differential Revision: https://phab.mercurial-scm.org/D7845

nodemap: code to parse the persistent binary nodemap data We now have code to read back what we persisted. This will be put to use in later changesets. Differential Revision: https://phab.mercurial-scm.org/D7844

nodemap: move the iteratio inside the Block object Having the iteration inside the serialization function does not help readability. Now that we have a `Block` object, let us move that code there. Differential Revision: https://phab.mercurial-scm.org/D7843

nodemap: use an explicit "Block" object in the reference implementation This will help us to introduce some test around the data currently written on disk. Differential Revision: https://phab.mercurial-scm.org/D7842

nodemap: add a optional `nodemap_add_full` method on indexes This method can be used to obtains persistent data for a full nodemap. The end goal is for some index implementation to managed the nodemap serialization them selves (eg: the rust implementation) Differential Revision: https://phab.mercurial-scm.org/D7841

nodemap: add a (python) index class for persistent nodemap testing Using the persistent nodemap require a compeling performance boost and an existing implementation. The benefit of the persistent nodemap for pure python code is unclear and we don't have a C implementation for it. Yet we would like to actually start testing it in more details and define an API for using that persistent nodemap. We introduce a new `devel` config option to use an index class dedicated to Nodemap Testing. This feature is "pure" only because having using a pure-python index with the `cext` policy proved more difficult than I would like. There is nothing going on in that class for now, but the coming changeset will change that. Differential Revision: https://phab.mercurial-scm.org/D7840

nodemap: delete older raw data file when creating a new ones When we write new full files, it replace an older one with a different name. We add the associated cleanup for the older file to be removed after the transaction. We delete all file matching the expected pattern to give use extra chance to delete orphan files we might have failed to delete earlier. Note: eventually we won't rewrite all data for each transaction. This is coming in later changesets. Differential Revision: https://phab.mercurial-scm.org/D7839

nodemap: use an intermediate "docket" file to carry small metadata This intermediate file will make mmapping, transaction and content validation easier. (Most of this usefulness will arrive gradually in later changeset). In particular it will become very useful to append new data are the end of raw file instead of rewriting on the file on each transaction. See in code comments for details. Differential Revision: https://phab.mercurial-scm.org/D7838

nodemap: only use persistent nodemap for non-inlined revlog Revlog are inlined while they are small (to avoid having too many file to deal with). The persistent nodemap will only provides a significant boost for large enough revlog index. So it does not make sens to add an extra file to store nodemap for small revlog. We could consider inclining the nodemap data inside the revlog itself, but the benefit is unclear so let it be an adventure for another time. Differential Revision: https://phab.mercurial-scm.org/D7837

nodemap: add a function to read the data from disk This changeset is small and mostly an excuse to introduce an API function reading the data from disk. Differential Revision: https://phab.mercurial-scm.org/D7836

nodemap: write nodemap data on disk Let us start writing data on disk (so that we can read it from there later). This series of changeset is going to focus first on having data on disk and updating it. Right now the data is written right next to the revlog data, in the store. We might move it to cache (with proper cache validation mechanism) later, but for now revlog have a storevfs instance and it is simpler to us it. The right location for this data is not the focus of this series. Differential Revision: https://phab.mercurial-scm.org/D7835

nodemap: have some python code writing a nodemap in persistent binary form This python code aims to be as "simple" as possible. It is a reference implementation of the data we are going to write on disk (and possibly, later a way for pure python install to make sure the on disk data are up to date). It is not optimized for performance and rebuild the full data structure from the index every time. This is a stepping stone toward a persistent nodemap on disk. Differential Revision: https://phab.mercurial-scm.org/D7834

cleanup: re-run black on the codebase Looks like a few patches have landed without having been blackened. I strongly suspect I should write a patch for baymax that blackens things on the way in... # skip-blame automatic formatting Differential Revision: https://phab.mercurial-scm.org/D8104

rust-re2: add wrapper for calling Re2 from Rust This assumes that Re2 is installed following Google's guide. I am not sure how we want to integrate it in the project, but I think a follow-up patch would be more appropriate for such work. As it stands, *not* having Re2 installed results in a compilation error, which is a problem as it breaks install compatibility. Hence, this is gated behind a non-default `with-re2` compilation feature. Differential Revision: https://phab.mercurial-scm.org/D7910

rust-filepatterns: add support for `include` and `subinclude` patterns This prepares a future patch for `IncludeMatcher` on the road to bare `hg status` support. Differential Revision: https://phab.mercurial-scm.org/D7909

rust-filepatterns: improve API and robustness for pattern files parsing Within the next few patches we will be using this new API. Differential Revision: https://phab.mercurial-scm.org/D7908

tests: add workaround for bzr bug This started failing for me today. I guess my bzr was upgraded. Differential Revision: https://phab.mercurial-scm.org/D8105

rust-utils: add util for canonical path Differential Revision: https://phab.mercurial-scm.org/D7871

test: simplify test-amend.t to avoid race condition Insted on relying on sleep, we could simply have the editor do the file change. This remove the reliance on "sleep" and avoid test failing on heavy load machine. To test this, I reverted the code change in 5558e3437872 and the test started failing again. This is a graft on stable of 141ceec06b55 which should have targeted for stable. Differential Revision: https://phab.mercurial-scm.org/D8103

remotefilelog-test: glob some flaky output line (issue6083) The two following lines are flaky underload, yet the final result is correct. The command involves background pre-check of output, these are not stable probably because they run in parallel in multiple process. I spent a couple of hours trying to understand the pattern and gave up. The documented intend of these tests is safely guaranteed by checking the cache content after the command. If it become useful to start testing precise internal details of the, they will have to be tested in a more appropriate framework than `.t` tests. Differential Revision: https://phab.mercurial-scm.org/D8102

httpconnection: allow `httpsendfile` subclasses to suppress the progressbar This will be neccessary for LFS, which manages the progressbar outside of the file. Differential Revision: https://phab.mercurial-scm.org/D7960

rust-dirstatemap: add `NonNormalEntries` class This fix introduces the same encapsulation as the `copymap`. There is no easy way of doing this any better for now. `hg up -r null && time HGRCPATH= HGMODULEPOLICY=rust+c hg up tip` on Mozilla Central, (not super recent, but it doesn't matter): Before: 7:44,08 total After: 1:03,23 total Pretty brutal regression! Differential Revision: https://phab.mercurial-scm.org/D8049

help: when possible, indicate flags implied by tweakdefaults Differential Revision: https://phab.mercurial-scm.org/D8101

help: add a mechanism to change flags' help depending on config It seems reasonable to have a similar mechanism for the rest of the help, but no such thing is implemented. The goal is to make the help of commands clearer in the presence of significant default changes, like tweakdefaults or with company-wide hgrcs. In these cases, a user looking at the help of a command doesn't exactly know what his hgrc is doing. Apply to this to the --git option of commands that display diffs, as this option in particular causes confusion for some reason. Differential Revision: https://phab.mercurial-scm.org/D8100

lfs: use str for the open() mode when opening a blob for py3 The other fix for this was to leave the mode as bytes, and import `pycompat.open()` like a bunch of other modules do. But I think it's confusing to still use bytes at the python boundary, and obviously error prone. Grepping for ` open\(.+, ['"][a-z]+['"]\)` and ` open\(.+, b['"][a-z]+['"]\)` outside of `tests`, there are 51 and 87 uses respectively, so it's not like this is a rare direct usage. Differential Revision: https://phab.mercurial-scm.org/D8099

rust-dirstatemap: cache non normal and other parent set Performance of `hg update` was significantly worse since the introduction of the Rust `dirstatemap`. This regression was noticed by Valentin Gatien-Baron when working on a large repository, as it goes unnoticed for smaller repositories like Mercurial itself. This fix introduces the same getter/setter mechanism at `hg-core` level as for `set/get_dirs`. While this technique is, as previously discussed, quite suboptimal, it fixes an important enough problem. Refactoring `hg-core` to use the typestate pattern could be a good approach to improving code quality in a future patch. Differential Revision: https://phab.mercurial-scm.org/D8048

tags: behave better if a tags cache entry is partially written This is done by discarding any partial cache entry, instead of filling the partial cache entry with 0xff before. Differential Revision: https://phab.mercurial-scm.org/D8095

tags: show how hg behaves if a tags cache entry is truncated I'm seeing an error of this form in production on the order of once a month. I'm not sure how it happens, but I suspect interrupting a pull might result in half written cache entries. Differential Revision: https://phab.mercurial-scm.org/D8094

tags: add a debug command to display .hg/cache/hgtagsfnodes1 Differential Revision: https://phab.mercurial-scm.org/D8093

purge: add -i flag to delete ignored files instead of untracked files It's convenient for deleting build artifacts. Using --all instead would delete other things too. Differential Revision: https://phab.mercurial-scm.org/D8096

pyoxidizer: use `legacy_windows_stdio` on Windows The C executable sets this too, otherwise no output shows up (when paging?). There is also `legacy_windows_fs_encoding`, but I'm not setting that for now because the C executable doesn't either. Differential Revision: https://phab.mercurial-scm.org/D8053

merge: use manifestdict.walk() instead of manifestdict.matches() As with other patches in this series, this avoids making a potentially-expensive copy of a manifest. Differential Revision: https://phab.mercurial-scm.org/D8084

manifest: rewrite filesnotin to not make superfluous manifest copies This also skips using diff() when all we care about is the filenames. I'm expecting the built in set logic to be plenty fast. For really large manifests with a matcher in play this should copy substantially less data around. Differential Revision: https://phab.mercurial-scm.org/D8082

merge with stable

archival: use walk() instead of matches() on manifest All we care about is the filepaths, so this avoids a pointless copy of the manifest that we only used to extract matching filenames. Differential Revision: https://phab.mercurial-scm.org/D8090

rust-dirs-multiset: improve temporary error message While we wait on a future patch that could verify that the paths passed to `DirsMultiset` have been audited, we still need to handle this error. This patch makes it easier to bubble up and makes the error clearer. Also, this patch introduces the `subslice_index` function that could be useful for other - albeit niche - purposes. Differential Revision: https://phab.mercurial-scm.org/D7921

exchange: check the `ui.clonebundleprefers` form while processing (issue6257) Otherwise the clone command will emit a long stacktrace if there is no `=` character. Differential Revision: https://phab.mercurial-scm.org/D7969

copies: add a new test dedicated to testing chain of changeset with merge The copies test we currently have usually focus on simple case that do not dive too much into longer chains involving merges. This new test file focus on extensive testing of these case to validate their behavior and make sure the various copies algorithm have the same behavior. And… actually these test are currently broken for the changeset centric algorithm since 99ebde4fec99, but it went undetected because these case were not tested. Differential Revision: https://phab.mercurial-scm.org/D8078

hgext: initial version of fastexport extension Differential Revision: https://phab.mercurial-scm.org/D7733

hghave: cache the result of gethgversion hghave --test-features calls it 90 times, each one calling hg --version which takes a tenth of a second on my workstation, adding up to about 10s win on test-hghave.t. Fixes https://bugs.debian.org/939756 Differential Revision: https://phab.mercurial-scm.org/D8092

resourceutil: blacken

clean: delete obsolete unlinking of .hg/graftstate The responsibility for clearing it is now in `cmdutil.clearunfinished()`, so we shouldn't have to unlink it in `hg.clean()`. Differential Revision: https://phab.mercurial-scm.org/D7992

copies: avoid filtering by short-circuit dirstate-only copies earlier The call to `y.ancestor(x)` triggered repo filtering, which we'd like to avoid in the simple `hg status --copies` case. Differential Revision: https://phab.mercurial-scm.org/D8071

tests: add test showing that repo filter is calculated for `hg st --copies` Differential Revision: https://phab.mercurial-scm.org/D8070

lfs: enable workers by default With the stall issue seemingly fixed, there's no reason not to use workers. The setting is left for now to keep the test output deterministic, and in case other issues come up. If none do, this can be converted to a developer setting for usage with the tests. Differential Revision: https://phab.mercurial-scm.org/D7963

lfs: fix the stall and corruption issue when concurrently uploading blobs We've avoided the issue up to this point by gating worker usage with an experimental config. See 10e62d5efa73, and the thread linked there for some of the initial diagnosis, but essentially some data was being read from the blob before an error occurred and `keepalive` retried, but didn't rewind the file pointer. So the leading data was lost from the blob on the server, and the connection stalled, trying to send more data than available. In trying to recreate this, I was unable to do so uploading from Windows to CentOS 7. But it reproduced every time going from CentOS 7 to another CentOS 7 over https. I found recent fixes in the FaceBook repo to address this[1][2]. The commit message for the first is: The KeepAlive HTTP implementation is bugged in it's retry logic, it supports reading from a file pointer, but doesn't support rewinding of the seek cursor when it performs a retry. So it can happen that an upload fails for whatever reason and will then 'hang' on the retry event. The sequence of events that get triggered are: - Upload file A, goes OK. Keep-Alive caches connection. - Upload file B, fails due to (for example) failing Keep-Alive, but LFS file pointer has been consumed for the upload and fd has been closed. - Retry for file B starts, sets the Content-Length properly to the expected file size, but since file pointer has been consumed no data will be uploaded, causing the server to wait for the uploaded data until either client or server reaches a timeout, making it seem as our mercurial process hangs. This is just a stop-gap measure to prevent this behavior from blocking Mercurial (LFS has retry logic). A proper solutions need to be build on top of this stop-gap measure: for upload from file pointers, we should support fseek() on the interface. Since we expect to consume the whole file always anyways, this should be safe. This way we can seek back to the beginning on a retry. I ported those two patches, and it works. But I see that `url._sendfile()` does a rewind on `httpsendfile` objects[3], so maybe it's better to keep this all in one place and avoid a second seek. We may still want the first FaceBook patch as extra protection for this problem in general. The other two uses of `httpsendfile` are in the wire protocol to upload bundles, and to upload largefiles. Neither of these appear to use a worker, and I'm not sure why workers seem to trigger this, or if this could have happened without a worker. Since `httpsendfile` already has a `close()` method, that is dropped. That class also explicitly says there's no `__len__` attribute, so that is removed too. The override for `read()` is necessary to avoid the progressbar usage per file. [1] https://github.com/facebookexperimental/eden/commit/c350d6536d90c044c837abdd3675185644481469 [2] https://github.com/facebookexperimental/eden/commit/77f0d3fd0415e81b63e317e457af9c55c46103ee [3] https://www.mercurial-scm.org/repo/hg/file/5.2.2/mercurial/url.py#l176 Differential Revision: https://phab.mercurial-scm.org/D7962

lfs: add a method to the local blobstore to convert OIDs to file paths This is less ugly than passing an open callback to the `httpsendfile` constuctor. Differential Revision: https://phab.mercurial-scm.org/D7961

merge: introduce a revert_to() for that use-case In the same vein as the previous patch. Differential Revision: https://phab.mercurial-scm.org/D7901

merge: introduce a clean_update() for that use-case I find it hard to understand what value to pass for all the arguments to `merge.update()`. I would like to introduce functions that are more specific to each use-case. We already have `graft()`. This patch introduces a `clean_update()` and uses it in some places to show that it works. Differential Revision: https://phab.mercurial-scm.org/D7902

manifest: fix _very_ subtle bug with exact matchers passed to walk() Prior to this fix, manifestdict.walk() with an exact matcher would blindly list the files in the matcher, even if they weren't in the manifest. This was exposed by my next patch where I rewrite filesnotin() to use walk() instead of matches(). Differential Revision: https://phab.mercurial-scm.org/D8081

rust-utils: add `Escaped` trait This will be used as a general interface for displaying things to the user. The upcoming `IncludeMatcher` will use it to store its patterns in a user-displayable string. Differential Revision: https://phab.mercurial-scm.org/D7870

rust-dirs-multiset: add `DirsChildrenMultiset` In a future patch, this structure will be needed to store information needed by the (also upcoming) `IgnoreMatcher`. Differential Revision: https://phab.mercurial-scm.org/D7869

rust-hg-path: add useful methods to `HgPath` This changeset introduces the use of the `pretty_assertions` crate for easier to read test output. Differential Revision: https://phab.mercurial-scm.org/D7867

rust-pathauditor: add Rust implementation of the `pathauditor` It does not offer the same flexibility as the Python implementation, but should check incoming paths just as well. Differential Revision: https://phab.mercurial-scm.org/D7866

py3: catch AttributeError too with ImportError Looks like py3 raises AttributeError instead of ImportError. This is caught on windows. Differential Revision: https://phab.mercurial-scm.org/D7965

context: use manifest.walk() instead of manifest.match() to get file list The former doesn't create a whole extra manifest in order to produce the matching file list, which is all we actually cared about here. Sigh. Differential Revision: https://phab.mercurial-scm.org/D8080

manifest: remove `.new()` from the interface Nothing used it. Differential Revision: https://phab.mercurial-scm.org/D8079

chg: force-set LC_CTYPE on server start to actual value from the environment Python 3.7+ will "coerce" the LC_CTYPE variable in many instances, and this can cause issues with chg being able to start up. D7550 attempted to fix this, but a combination of a misreading of the way that python3.7 does the coercion and an untested state (LC_CTYPE being set to an invalid value) meant that this was still not quite working. This change will cause differences between chg and hg: hg will have the LC_CTYPE environment variable coerced, while chg will not. This is unlikely to cause any detectable behavior differences in what Mercurial itself outputs, but it does have two known effects: - When using hg, the coerced LC_CTYPE will be passed to subprocesses, even non-python ones. Using chg will remove the coercion, and this will not happen. This is arguably more correct behavior on chg's part. - On macOS, if you set your region to Brazil but your language to English, this isn't representable in locale strings, so macOS sets LC_CTYPE=UTF-8. If this value is passed along when ssh'ing to a non-macOS machine, some functions (such as locale.setlocale()) may raise an exception due to an unsupported locale setting. This is most easily encountered when doing an interactive commit/split/etc. when using ui.interface=curses. Differential Revision: https://phab.mercurial-scm.org/D8039

perf: fix list formatting in perfindex documentation Differential Revision: https://phab.mercurial-scm.org/D8067

test: simplify test-amend.t to avoid race condition Insted on relying on sleep, we could simply have the editor do the file change. This remove the reliance on "sleep" and avoid test failing on heavy load machine. To test this, I reverted the code change in 5558e3437872 and the test started failing again. Differential Revision: https://phab.mercurial-scm.org/D8065

test: document test-copy-move-merge.t Differential Revision: https://phab.mercurial-scm.org/D8077

manifest: remove optional default= argument on flags(path) It had only one caller inside manifest.py, and treemanifest was actually incorrectly implemented. treemanifest is still missing the fastdelta() method from the interface (and so doesn't yet conform), but this is at least progress. Differential Revision: https://phab.mercurial-scm.org/D8069

py3: fully fix bundlepart.__repr__ to return str not bytes My previous fix did not fully fix the issue: it would attempt to use %-formatting to combine two strs into a bytes, which won't work. Let's just switch the entire function to operating in strs. This can cause a small output difference that will likely not be noticed since no one noticed that the method wasn't working at all before: if `id` or `type` are not-None, they'll be shown as `b'val'` instead of `val`. Since this is a debugging aid and these strings shouldn't be shown to the user, slightly rough output is most likely fine and it's likely not worthwhile to add the necessary conditionals to marginally improve it. Differential Revision: https://phab.mercurial-scm.org/D8091

heptapod-ci: add a job to test the rust version of Mercurial The rust version of Mercurial is not currently tested by anything else. So it get quite important that developer runs it. Differential Revision: https://phab.mercurial-scm.org/D8017

heptapod-ci: run the --pure test too These are usually rarely run by individual developper because they are slow. However it is important that they stay happy. Differential Revision: https://phab.mercurial-scm.org/D8016

heptapod-ci: run the normal test suite The usual tests should be run too. We skip the "tests-check*.t" one because their are already covered by another Ci step. Differential Revision: https://phab.mercurial-scm.org/D8015

heptapod-ci: also run the dedicated rust test for the rust code The Rust code has various standard rust test that are fast to run. So let's run them. Differential Revision: https://phab.mercurial-scm.org/D8014

heptapod-ci: run test with python3 too Python3 is the future^W present, it is important to run tests with it too. Differential Revision: https://phab.mercurial-scm.org/D8013

heptapod-ci: colorize output The run result are nicer to read with color. Differential Revision: https://phab.mercurial-scm.org/D8012

heptapod-ci: add a basic file to be able to run tests with heptapod Having this yaml file somewhere in the main mercurial repository makes it trivial for contributors using heptapod to run CI on their in-progress work. There are alot of different combination (python2/python3 pure/cext/rust/pypy) to be tested and making sure all of them are covered manually is cumbersome. Automatic CI runnig on draft really helps in that matters. We start small bu later changesets will add more step testing more of the variants. The series is targetted on stable to make it available to the widest amount of contribution possible. The definition of the docker files used for this are available here: https://dev.heptapod.net/octobus/ci-dockerfiles Differential Revision: https://phab.mercurial-scm.org/D8011

worker: manually buffer reads from pickle stream My previous fix (D8051, cb52e619c99e, which added Python's built-in buffering to the pickle stream) has the problem that the selector will ignore the buffer. When multiple pickled objects are read from the pipe into the buffer at once, only one object will be loaded. This can repeat until the buffer is full and delays the processing of completed items until the worker exits, at which point the pipe is always considered readable and all remaining items are processed. This changeset reverts D8051, removing the buffer again. Instead, on Python 3 only, we use a wrapper to modify the "read" provided to the Unpickler to behave more like a buffered read. We never read more bytes from the pipe than the Unpickler requests, so the selector behaves as expected. Also add a test case for "pickle data was truncated" issue. https://phab.mercurial-scm.org/D8051#119193 Differential Revision: https://phab.mercurial-scm.org/D8076

py3: __repr__ needs to return str, not bytes Differential Revision: https://phab.mercurial-scm.org/D8089

config: also respect HGRCSKIPREPO in the zeroconf extension Differential Revision: https://phab.mercurial-scm.org/D8075

config: also respect HGRCSKIPREPO in hgwebdir_mod Differential Revision: https://phab.mercurial-scm.org/D8074

config: also respect HGRCSKIPREPO in `dispatch._getlocal` For some reason, we are also reading the local config in that function. Differential Revision: https://phab.mercurial-scm.org/D8073

config: add a function in `rcutil` to abstract HGRCSKIPREPO We wil need to respect this environment variable in more place. Differential Revision: https://phab.mercurial-scm.org/D8072

packaging: make the path to Win32 requirements absolute when building WiX Otherwise this broke automation when not launched from `contrib/packaging`. Differential Revision: https://phab.mercurial-scm.org/D8068

resourceutil: blacken

merge with stable

rebase: abort if the user tries to rebase the working copy I think it's more correct to treat `hg rebase -r 'wdir()' -d foo` as `hg co -m foo`, but I'm instead making it error out. That's partly because it's probably what the user wanted (in the case I heard from a user, they had done `hg rebase -s f` where `f` resolved to `wdir()`) and partly because I don't want to think about more complicated cases where the user specifies the working copy together with other commits. Differential Revision: https://phab.mercurial-scm.org/D8057

tests: add tests for rebasing wdir() revision Differential Revision: https://phab.mercurial-scm.org/D8056

merge: when rename was made on both sides, use ancestor as merge base When both sides of a merge have renamed a file to the same place, we would treat that as a "both created" action in merge.py. That means that we'd use an empty diffbase. It seems better to use the copy source as diffbase. That can be done by simply dropping code that prevented us from doing that. I think I did it that way in 57203e0210f8 (copies: calculate mergecopies() based on pathcopies(), 2019-04-11) only to preserve the existing behavior. I also suspect it was just an accident that it behaved that way before that commit. Note that until fa9ad1da2e77 (merge: start using the per-side copy dicts, 2020-01-23), it was non-deterministic (depending on iteration order of the `allsources` set in `copies._fullcopytracing()`) which source was used in the affected test case in test-rename-merge1.t. We could easily have fixed that by sorting them, but now we can instead detect the case (the TODO added in the previous patch). Differential Revision: https://phab.mercurial-scm.org/D7974

absorb: graduate -i flag from experimental The interactive mode seems to work well. I have previously thought that `-i` should be what `-e` does, but the current behavior matches what other `-i` flags do (select a subset of the hunks), so I think that is what we want. Differential Revision: https://phab.mercurial-scm.org/D8055

rust-cpython: remove PySharedRefCell and its companion structs Also updates py_shared_iterator!() documentation accordingly.

rust-cpython: switch to upstreamed version of PySharedRefCell Our PyLeaked is identical to cpython::UnsafePyLeaked. I've renamed it because it provides mostly unsafe functions.

rust-cpython: rename inner_shared() to inner() The "shared" accessor will be automatically generated, and will have the same name as the data itself.

rust-cpython: use PyList.insert() instead of .insert_item() Silences the deprecated warning. https://github.com/dgrunwald/rust-cpython/commit/e8cbe864841714c5555db8c90e057bd11e360c7f

rust-cpython: bump cpython to 0.4 to switch to upstreamed PySharedRef

rust: update dependencies For no particular reason, but just because I'll bump the rust-cpython version.

Added signature for changeset 7f5410dfc8a6

Added tag 5.3 for changeset 7f5410dfc8a6

rust-dirstatemap: add missing @propertycache While investigating a regression on `hg update` performance introduced by the Rust `dirstatemap`, two missing `@propertycache` were identified when comparing against the Python implementation. This adds back the first one, that has no observable impact on behavior. The second one (`nonnormalset`) is going to be more involved, as the caching has to be done from the Rust side of things. Differential Revision: https://phab.mercurial-scm.org/D8047

worker: Use buffered input from the pickle stream On Python 3, "pickle.load" will raise an exception ("_pickle.UnpicklingError: pickle data was truncated") when it gets a short read, i.e. it receives fewer bytes than it requested. On our build machine, Mercurial seems to frequently hit this problem while updating a mozilla-central clone iff it gets scheduled in batch mode. It is easy to trigger with: #wipe the workdir rm -rf * hg update null chrt -b 0 hg update default I've also written the following program, which demonstrates the core problem: from __future__ import print_function import io import os import pickle import time obj = {"a": 1, "b": 2} obj_data = pickle.dumps(obj) assert len(obj_data) > 10 rfd, wfd = os.pipe() pid = os.fork() if pid == 0: os.close(rfd) for _ in range(4): time.sleep(0.5) print("First write") os.write(wfd, obj_data[:10]) time.sleep(0.5) print("Second write") os.write(wfd, obj_data[10:]) os._exit(0) try: os.close(wfd) rfile = os.fdopen(rfd, "rb", 0) print("Reading") while True: try: obj_copy = pickle.load(rfile) assert obj == obj_copy except EOFError: break print("Success") finally: os.kill(pid, 15) The program reliably fails with Python 3.8 and succeeds with Python 2.7. Providing the unpickler with a buffered reader fixes the issue, so let "os.fdopen" create one. https://bugzilla.mozilla.org/show_bug.cgi?id=1604486 Differential Revision: https://phab.mercurial-scm.org/D8051