Mercurial 7.0rc0

These are the release notes for a release candidate version of Mercurial, anything and everything is subject to change.

Packaging Changes

The 7.0 release is the first to be compliant with PEP 517.

This required an overhaul of the Mercurial packaging: packagers should pay extra attention to this release and report any issues they might encounter with the new system.

In practice, this means that Mercurial's setup.py can no longer be called directly. Instead, one should build the Mercurial package using PyPA's build package (https://github.com/pypa/build). In the general case, this will take care of the build dependencies, but packagers might want to explicitly manage them. Currently the build depends on:

• wheel

• setuptools>=64

• setuptools_scm>=8.1.0

• docutils

The Makefile no longer offers a build target. We now use BuildTools 2022 when building Windows packages.

Other Backwards Compatibility Changes

• sslutil: bump the default minimum TLS version of the client to 1.2 (BC) (085cc409847d)
• setup: require TLS 1.2 support from the Python interpreter (BC) (a820a7a1fce0)

New Features

• It is now possible to store inline clone bundle outside of .hg (48572371d478)

• Added a generic storage.all-slow-path option to control the default behavior regarding degraded support for some repository format. (bbbb12632607)

• Added a --to flag to hg graft that allows graft in memory (68dc6cecca32)

• Added a fix.extra-bin-paths configuration for the fix extension (1330278b9029)

New Experimental Features

• add a --ignore-changes-from-ancestors option (688665425496)
• stream-clone: use dedicated threads to write the data on disk (7f848cfc4286, 58baa86c7a02, aee193b1c784)

• the experimental git extension now supports more commands

Bug Fixes

• subrepo: fix calling outgoing with multiple paths (85c095c1f8bc)
• stream clone: fix a race condition around volatile files (46574e588017, 3f0cf7bb3086)
• rhg: set the expected dirstate permissions (0o666 minus umask) (a48c688d3e80)
• rhg: fix matcher issue (136e74c2bf8f)

• rhg files correctly implements --rev (it instead provided --revision)

Rust

• the Rust code is now exposed to Python though PyO3 instead of rust-cpython (6673cec8605c)¹

• rhg: support status --change, including --copies (bde718849153)

• Rust implementation for the internal part of revlogs

• Rust implementation for hg annotate (6183949219b2)

• Rust implementation for hg update from a completely empty working copy

[1] Both rust-cpython and PyO3 bridges are present in this release in case users need to switch back (by changing every importrust call) in case something went really wrong in the translation. The rust-cpython code will be removed entirely in Mercurial 7.1.

Miscellaneous

• help: modernize the help text for hostsecurity.minimumprotocol (b65085c6d6ff)

• run-tests: add a 4th HGPORT value (7f8d0c2c3692)

• rust-ignore: make debugignorerhg command show a full regex, with exact files (e2e49069eeb6)

• tests: fix filtertraceback.py to handle contiguous File lines (8431296a93e8)

• typing: moved interface logic from zope interfaces to typing.Protocol (a1c0f19e7cb4)

• format: add pattern filtering to debugformat (8dede0df9de9)

• run-tests: add a --tail-report argument to analyze run parallelism (a814534aaedd)