test-extension: make the test compatible with chg This test fails when run with chg. This commit just makes the test chg aware by fixing the output of some of the tests. Test Plan: Ran the test 'test-extension.t' with and without '--chg' option. Differential Revision: https://phab.mercurial-scm.org/D1160

hghave: disable demandimport when chg is running Chg disables demandimport on purpose for performance wins and therefore, it probably makes sense to indicate that demandimport is disabled when chg is running. Test Plan: Ran all the tests. Differential Revision: https://phab.mercurial-scm.org/D1161

test-show: make it compatible with chg The show extension reads `commands.show.aliasprefix` config in its `extsetup` and that causes issues with chg. This patch adds that config item to chg confighash to solve the issue. Test Plan: `run-tests.py -l --chg test-show.t` Differential Revision: https://phab.mercurial-scm.org/D1158

templater: use pycompat.sysbytes to bytes-ify some __name__ attrs Spotted by yuya in review of e87e62b7fc0b. Differential Revision: https://phab.mercurial-scm.org/D1145

templatefilters: defend against evil unicode strs in json filter We only want to do I/O in terms of bytes, so lets explode early instead of recursing forever. Differential Revision: https://phab.mercurial-scm.org/D1136

phase: use a binary phase part to push through bundle2 (BC) The part we are using for pull is now used for push too. As we no longer use pushkey, pushkey hooks are no longer triggered. This is an obvious backward incompatible change. We could artificially trigger the pushkey hook within the bundle2 part, but this seemed too hacky to me. An option would be to disable by default this new mechanism for a couple of versions to help people migrate to `txnclose-phase`. I took the liberal and optimistic path to just turn it on by default directly. .. bc:: Push no longer triggers a pushkey hook when updating phases. Use the new `txnclose-phase` and `txnclose-phase` hooks instead. (Applies when both server and client use version 4.4 or above).

arbitraryfilecontext: skip the cmp fast path if any side is a symlink `filecmp` follows symlinks by default, which a `filectx.cmp()` call should not be doing as it should only compare the requested entry. After this patch, only the contexts' data are compared, which is the correct contract. This is a corrected version of D1122. Differential Revision: https://phab.mercurial-scm.org/D1165

test-clang-format: new test to verify that files stay clang-formatted For now all .c and .h files are blacklisted. As they become clang-formatted, we'll remove them from the blacklist,and then this test will produce output if there are diffs. Differential Revision: https://phab.mercurial-scm.org/D1133

context: audit paths before clearing unknown files and dirs Fix regression introduced in D785. In some circumstances, context.clearunknown can be called before the path is audited. Audit the path before deleting any conflicting files. Differential Revision: https://phab.mercurial-scm.org/D1157

tests: add test demonstrating regression in path audit D785 regressed behavior in path auditing: files can be deleted if they have a path that conflicts with a filename from a malicious remote or bundle. This test demonstrates the problem - the file should not have been deleted. Differential Revision: https://phab.mercurial-scm.org/D1156

configitems: move rebase config into core The shelve extensions import and call rebase content without loading the extension. This is problematic as the config items rebase uses are not declared and the default value are not set, etc... The shelve extension should be using core utilities only and the necessary bit should be moved from rebase into core. In the meantime, I'm taking a small step to get config registration completed with minimal overhead. The rebase extension is shipped with core so registering its config option within core is not a big issue. This is the last step needed before we can install a warning that enforces all config to be registered.

eol: ensure the eol extensions is loaded when hooks run Similar to the change we did to the 'acl' extensions, we want to make sure the config items are registered before we run the hooks.

acl: make sure the extensions is enabled when the acl-hooks run The acl extension is usually setup through hooks and never directly activated. This means the config item declared in the extension are not loaded. We add the necessary logic to make sure the extensions are loaded before the hook run.

configitems: register the 'web.archivesubrepos' config

configitems: register the 'experimental.effect-flags' config

configitems: register the full 'merge-tools' config and sub-options We register the merge-tools config section (which has an arbitrary base config value) and the possible sub-attribute. The sub-attribute has to be registered first or at the same time otherwise the '.*' item would shadow them. Merge tools could include "." in their name so we can't constrain any more than just ".*".

revlog-sparse-read: add a lower-threshold for read block size The option experimental.sparse-read.min-block-size specifies the minimal size of a deltachain span, under which it won't be split by _slicechunk.

revlog: introduce an experimental flag to slice chunks reads when too sparse Delta chains can become quite sparse if there is a lot of unrelated data between relevant pieces. Right now, revlog always reads all the necessary data for the delta chain in one single read. This can lead to a lot of unrelated data to be read (see issue5482 for more details). One can use the `experimental.maxdeltachainspan` option with a large value (or -1) to easily produce a very sparse delta chain. This change introduces the ability to slice the chunks retrieval into multiple reads, skipping large sections of unrelated data. Preliminary testing shows interesting results. For example the peak memory consumption to read a manifest on a large repository is reduced from 600MB to 250MB (200MB without maxdeltachainspan). However, the slicing itself and the multiple reads can have an negative impact on performance. This is why the new feature is hidden behind an experimental flag. Future changesets will add various parameters to control the slicing heuristics. We hope to experiment a wide variety of repositories during 4.4 and hopefully turn the feature on by default in 4.5. As a first try, the algorithm itself is prone to deep changes. However, we wish to define APIs and have a baseline to work on.

revlog: ignore empty trailing chunks when reading segments When a merge commit creates an empty diff in the revlog, its offset may still be quite far from the end of the previous chunk. Skipping these empty chunks may reduce read size significantly. In most cases, there is no gain, and in some cases, little gain. On my clone of pypy, `hg manifest` reads 65% less bytes (96140 i/o 275943) for revision 4260 by ignoring the only empty trailing diff. For revision 2229, 35% (34557 i/o 53435) Sadly, this is difficult to reproduce, as hg clone can make its own different structure every time.

phase: isolate logic to update remote phrase through bundle2 pushkey Move the logic to build bundle2 pushkey part into its dedicated function. It will help to keep the logic clear when adding support for sending phases change using 'phase-heads' part.

phase: generate a push-race detection part on push We are about to switch phase pushing from using pushkey to using a the new dedicated binary part. We introduce the push race detection on its own to help detect potential impact.

phase: introduce a new 'check:phases' part This part checks if revisions are still in the same phase as when the bundle was generated. This is similar to what 'check:heads' or 'check:updated-heads' bundle2 part achieves for changesets. We needs seems before we can move away from pushkey usage from phase since pushkey has it own built-in push-race detection.

phase: gather remote phase information in a summary object We keep useful phase information around. The data will be reused with detecting push-race in later changesets.

phase: simplify the check for issue3781 shortcut in discovery We'll rework the code around this check. Limiting the entanglement will help with later changesets

exchange: fix issue3781 reference in the comment This comment is about: issue3781: Courtesy Phases synchronisation to publishing server prevent subrepo push Not about: issue3871: Slow hg log when template contains {file_adds}, {file_mods} and {file_dels}

phase: filter out non-draft item in "draft root" The on-disk file can contain draft root that are descendants of secret root. The resulting phase computation is correct, but the phases root content is not. I will send another series to introduce code that remove some of the cases where this can happens, but we first need to damage control the existing case. After this changeset, we can no longer advertise secret changeset as draft root.

subrepo: share instead of clone if the parent repo is shared (issue5675) (BC) Previously, only the top level repo was shared, and then any subrepos were cloned on demand. This is problematic because commits to the parent repo would write an updated .hgsubstate to the share source, but the corresponding subrepo commit would be stuck in the local subrepo. That would prevent an update in the source repo. We already go to great lengths to avoid having inconsistent repos (e.g., `hg push -r rev` will push _everything_ in a subrepo, even if it isn't referenced in one of the parent's outgoing commits). Therefore, this seems like a bug fix, and there's no option to get the old behavior. I can't imagine the previous behavior was useful to anybody. There shouldn't be an issue with svn, since it is centralized. Maybe --git-dir can be used for git subrepos, but I'll leave that to someone more familiar with git. An integer was previously being implicitly returned from commands.share(), which caused dispatch() to start crashing when changing over to returning the shared repo. All error paths appear to raise, so this can be hardcoded to success. The clone command checks for 'is None' in a similar pattern, but since hg.clone() always returns a tuple, that seems wrong? .. fix:: Issue 5675 Creating a share of a repository with a Mercurial subrepository will now share the subrepository. and .. bc:: Mercurial subrepositories are now shared instead of cloned when the parent repository is shared. This prevents dangling subrepository references in the share source. Previously shared repositories with cloned subrepositories will continue to function unchanged.

tests: update output for no-symlink platforms This goes with eb586ed5d8ce.

releasenotes: show a warning if fuzzywuzzy is not present Differential Revision: https://phab.mercurial-scm.org/D1121

releasenotes: move import of fuzzywuzzy to import level This will help us in determining easily that whether fuzzywuzzy is loaded or not loaded in any of the function. Differential Revision: https://phab.mercurial-scm.org/D1120