Backed out changeset ff523675cd69

rust: use `cpython` 0.7.2 crate to add support for Python 3.12 This will give us more headroom until we can migrate to PyO3 some day.

revbranchcache: disable mmap access by default The revbranchcache can be truncated (if some part of it is detected as invalid). Using mmap on file we truncate is not an option at access to truncated part would result in a SIGBUS signal. So we disable the mmap by default until we fix this issue.

portability: fix build on Solaris-derived systemd Current Illumos and older Solaris require _XOPEN_SOURCE for msg_control. O_DIRECTORY doesn't exist on older systems either, so fallback to O_RDONLY. It's good enough as a repository will require both R and X permission anyway.

mmap: only use mmap to read revlog persistent nodemap if it is safe Cf `is_mmap_safe` docstring.

mmap: fix another instance of reverse mmap logic in persistent nodemap This fix the same kind of issue as 85d96517e650

mmap: only use mmap to read rev-branch-cache data if it is safe Cf `is_mmap_safe` docstring.

mmap: only use mmap to read revlog index if it is safe Cf `is_mmap_safe` docstring.

mmap: add a `is_mmap_safe` method to vfs This will be useful to safeguard mmap usage to void SIGBUS when repositories lives on a NFS drive.

Added signature for changeset 6454c117c6a4

Added tag 6.8rc0 for changeset 6454c117c6a4

branching: merge default into stable for 6.8rc0

relnotes: add 6.8rc0

branch3: use an explicitely experimental name for files Since this format is still experimental, we don't want to have to side-step the `branch3` name in case people do start using it before it's stable.

obsolete: simplify relevantmarker Drop duplicate assignment from a merge failure. Save one loop iteration by exploiting that pendingnodes will be seennodes after the first round anyway, so just pre-initialize the set accordingly. From Anton Shestakov's review on !867. Performance difference for my test case is in the noise.

exchange: improve computation of relevant markers for large repos Find the candidates for nodes with relevant markers by going over all markers instead of iterating over all nodes. Most nodes will not have markers anyway. Further optimize the code by allowing revsets as well, which reduces the materialization cost.

branching: merge stable into default

narrow: add a test for linkrev computation done during widen This new tests show that the linkrev computed and sent by the server might end up being wrong during a widen operation.

obsolete: quote the feature name This makes it at least somewhat clearer that hg is talking about some specific feature and not just outdated code.

branching: merge stable into default

clonebundles: add missing newline to legacy response This seems to have been removed in 6.5 (likely by 60f9602b413e).

dirstate: remove the python-side whitelist of allowed matchers This whitelist is too permissive because it allows matchers that contain disallowed ones deep inside, for example through `intersectionmatcher`. It is also too restrictive because it doesn't pass through some of the matchers we support, such as `patternmatcher`. It's also unnecessary because unsupported matchers raise `FallbackError` and we fall back anyway. Making this change makes more of the tests use rust code path, and therefore subtly change behavior. For example, rust status in largefiles repos seems to have strange behavior.

match: make `was_tampered_with` work recursively This is useful if we are to use it outside of Rust, when deciding whether or not to do some fast-path operation with a given matcher.

largefiles: mark more matchers as having been tampered with These happened to slip through the cracks earlier because they weren't caught by tests. Now that we're enabling rust fast path more widely these start breaking.

branching: merge stable into default

hgrc: search XDG_CONFIG_HOME on mac Searching for hgrc was special cased not to look through ~/.config/hg on Mac, but that’s unnecessary: Macs support it as do other unix based systems. There are plenty tools that use it there, e.g. git, and people expect it to work, e.g. "https://stackoverflow.com/questions/72499837/mercurial-on-macos-doesnt-read-config-hg-hgrc". Initial code introduced in 354020079723.

base-revsets: use an author that actually exercises a lot of changesets This was caught in my big find-and-replace: d4ba4d51f85f. The point of `base-revsets` is to give revsets that will give a good coverage of the repository. Using Pierre-Yves as the second largest committer (in terms of number of changesets) seems like a good idea.

match: simplify the rust-side file pattern kind parsing There's no need to add the ':' characters if we're simply pattern matching against constants next.

match: share code between includematcher and patternmatcher No need to have this duplication.

matchers: support patternmatcher in rust