rust: use the bytes-cast crate to parse persistent nodemaps This crate casts pointers to custom structs, with compile-time safety checks, for easy and efficient binary data parsing. See https://crates.io/crates/bytes-cast and https://docs.rs/bytes-cast/0.1.0/bytes_cast/ Differential Revision: https://phab.mercurial-scm.org/D9788

cext: restore the ability to build on Windows with py2 This broke in e92ca942ddca. Differential Revision: https://phab.mercurial-scm.org/D9867

command-namespace: use `::` are the command separator This was discussed on the mailing list / phab and `::` got a couple of positive feedback. I dediced to not introduce automatic folding of `::`, I feel like it make sense for `-`, but I like the expliciteness of `::`. So I am adding alias for backward compatibility. Differential Revision: https://phab.mercurial-scm.org/D9872

perf: test the formatting of a command help Since we are about to addd ':' in command name I want this covered. Differential Revision: https://phab.mercurial-scm.org/D9871

help: escape ':' (as '\:') when generating command names We need this before we can use ":" in command names. Differential Revision: https://phab.mercurial-scm.org/D9870

minirst: respect escaping in definition list key If we start adding `:` in command names… we need minirst to not choke on them. Differential Revision: https://phab.mercurial-scm.org/D9869

run-test: avoid byte issue when replacing output file of python test Otherwise we get error like:: FileNotFoundError: [Errno 2] No such file or directory: "b'…/tests/test-minirst.py'.out" Differential Revision: https://phab.mercurial-scm.org/D9868

store: use `endswith` to detect revlog extension Suggested by Gregory Szorc. Differential Revision: https://phab.mercurial-scm.org/D9865

black: merge config into main pyproject.toml now that we have it This means that naive contributors who just run `black` on a source file will get reasonable behavior as long as they have a recent black. Yay! Differential Revision: https://phab.mercurial-scm.org/D9834

pyproject: add config file This will tell pip et al to call our setup.py for the majority of packaging concerns, but also gives us a place to put standard config stuff like black. Differential Revision: https://phab.mercurial-scm.org/D9833

upgrade: update only requirements if we can Upgrade operations which involves just upgrading requirements earlier used to go through whole revlog cloning business. Now we just upgrade the requirement and skip the cloning part. Differential Revision: https://phab.mercurial-scm.org/D9775

engine: add `if True` to prepare for next patch This will help making next patch easier to read. Differential Revision: https://phab.mercurial-scm.org/D9774

test: unquiet few tests to demonstrate changes in upcoming patches Upcoming patches will skip revlog cloning for share-safe upgrades. Differential Revision: https://phab.mercurial-scm.org/D9773

upgrade: mark sharesafe improvement as only touching requirements Upgrading the repository to use share safe functionality only touches requirements. Differential Revision: https://phab.mercurial-scm.org/D9772

actions: calculate what all parts does the operation touches To make upgrade work less in certain situations, we need to teach it to find out what all parts of repository current operation is touching. This patch starts doing that. In next patch we will be setting values in improvement objects. For now, we assume everything touches everything. Differential Revision: https://phab.mercurial-scm.org/D9771

upgrade: don't create store backup if `--no-backup` is passed If the user explicitly mentioned that they don't need backup, then let's not create it. Differential Revision: https://phab.mercurial-scm.org/D9770

cext: add Python 3.10 support * Replace "Py_TYPE(obj) = type;" with "Py_SET_TYPE(obj, type);" * Add pythoncapi_compat.h header file to get Py_SET_TYPE() on Python 2.7-3.8. Header file added to mercurial/ and contrib/python-zstandard/zstd/common/. In Python 3.10, Py_TYPE(obj) must not longer be used as an l-value. pythoncapi_compat.h comes from: https://github.com/pythoncapi/pythoncapi_compat Differential Revision: https://phab.mercurial-scm.org/D9825

revlog: decouple caching from addrevision callback for addgroup For changesets, it is useful to cache the content as it will almost always be processed afterwards. For manifests on the other hand, the content is often not used directly as there is a fast path for deltas. Explicitly disable the cache in exchangev2's manifest handling for that reason. Differential Revision: https://phab.mercurial-scm.org/D9847

branchmap: update rev-branch-cache incrementally Historically, the revision to branch mapping cache was updated on demand and shared via bundle2 to avoid the cost of rebuilding on first use. Use the new `register_changeset` callback and update rbc directly on every change. Make the transfer of the bundle part redundant, but keep it for the moment to avoid the test churn. Over all, "hg unbundle" for large bundles is less than 1.8% slower for different larger repositories and that seems to a reasonable trade off. Differential Revision: https://phab.mercurial-scm.org/D9781

repository: introduce register_changeset callback The new callback is called whenever a changeset is added to the repository (commit, unbundle or exchange). Since the bulk operations already parse the changeset (readfiles or full changesetrevision), always use the latter to avoid redundant lookups. The first consumer of the new interface needs to look at extra. Differential Revision: https://phab.mercurial-scm.org/D9780

changelog: move branchinfo to changelogrevision The function parses the extra dictionary after looking up the changelogrevision. To avoid duplicated look up, it is better to provide it as property of changelogrevision instead. Keep the function for a release cycle as at least the topic extension depends on it. Differential Revision: https://phab.mercurial-scm.org/D9779

rust: lower compile error on non-linux platforms to a warning As discussed on D9671#146704 this lowers the error to a warning. Differential Revision: https://phab.mercurial-scm.org/D9852

purge: move extension into core mercurial The motivation is simple: it's nicer to avoid gating basic functionality. To reduce the risk of people shooting themselves in the feet, `--confirm` is now the default, unless the extensions is loaded.. For review of the body of the purge command, use this instead of what hg/phabricator will show (the block of code is modified, not just moved): Differential Revision: https://phab.mercurial-scm.org/D9820

purge: also deal with directory with --confirm Getting the exact number is simple (you have to project the result of previous deletion to detect super-directory with only about-to-be-deleted content). So we use a vaguer message. Differential Revision: https://phab.mercurial-scm.org/D9819