view relnotes/6.2 @ 49416:1bad05cfc818 stable

rust: bump to memmap2 0.5.3, micro-timer 0.4.0, and crossbeam-channel 0.5.0

The merge in 12adf8c695ed had conflicts in rust/Cargo.lock and
rust/hg-core/Cargo.toml . Let's ignore rust/Cargo.lock - it is regenerated.

For rust/hg-core/Cargo.toml, stable had dd6b67d5c256 "rust: fix unsound
`OwningDirstateMap`" which introduced ouroboros (and dropped
stable_deref_trait).

Default had ec8d9b5a5e7c "rust-hg-core: upgrade dependencies" which had a lot
of churn bumping minimum versions - also patch versions. It is indeed a good
idea to bump to *allow* use of latest package. That means that major versions
should be bumped for packages after 1.0, and for packages below 1.0 minor
versions should be bumped too. But it doesn't work to try enforce a policy of
using latest patch by bumping versions at arbitrary times.

For good or bad, the merge doesn't seem to have resolved the conflicts
correctly, and many of the minor "upgrade dependencies" were lost again.

Unfortunately, it also lost the bump of memmap2 to 0.5.3, which is needed for
Fedora packaging where 0.4 isn't available. Same with micro-timer bump to 0.4
(which already is used in rhg). crossbeam-channel bump was also lost.

This change fixes that regression by redoing these "important" lines of the
merge "correctly".

I propose this for stable, even though dependency changes on stable branches
are annoying.

= Mercurial 6.2rc0 =

'''This is the first release to support Python 3.6+ ''only'''''

== New Features ==
 * Introduce a way to auto-upgrade a repo for certain requirements (see `hg help config.format`)
 * filemerge: add support for partial conflict resolution by external tool
 * contrib: add a partial-merge tool for sorted lists (such as Python imports)
 * revlog: reorder p1 and p2 when p1 is null and p2 is not while respecting issue6528
 * rhg: add support for ignoring all extensions
 * completion: install completers to conventional locations
 * revert: ask user to confirm before tracking new file when interactive
 * Rust implementation now uses the new dirstate API
 * sslutil: be less strict about which ciphers are allowed when using --insecure
 * sslutil: support TLSV1_ALERT_PROTOCOL_VERSION reason code
 * absorb: make `--edit-lines` imply `--apply-changes`
 * diff: add help text to highlight the ability to do merge diffs
 * censor: make rhg fall back to python when encountering a censored node
 * clone: use better names for temp files
 * debuglock: make the command more useful in non-interactive mode
 * debugdeltachain: distinct between snapshot and other diffs
 * debugindex: rename to debugindex debug-revlog-index
 * Make debug-revlog-index give out more information
 * sparse: use the rust code even when sparse is present

== Bug Fixes ==
 * Python 3 bugfixes
 * Windows bugfixes
 * templates: make `firstline` filter not keep '\v', '\f' and similar
 * rhg: sort unsupported extensions in error message
 * Improve performance of all functions that extract the first line of a text
 * crecord: avoid duplicating lines when reverting noeol->eol change
 * Some config.path options are now discoverable via config
 * mail: don't complain about a multi-word email.method
 * bundlespec: do not overwrite bundlespec value with the config one
 * bundlespec: do not check for `-` in the params portion of the bundlespec
 * bundlespec: handle the presence of obsmarker part
 * sparse: start moving away from the global variable for detection of usage
 * rust-changelog: don't skip empty lines when iterating over changeset lines
 * narrow: support debugupgraderepo
 * bundle: quick fix to ludicrous performance penalty
 * followlines: don't put Unicode directly into the .js file (issue6559)
 * manifest: improve error message in case for tree manifest
 * revlog: use %d to format int instead of %lu (issue6565)
 * revlog: use appropriate format char for int ("i" instead of I")
 * worker: stop relying on garbage collection to release memoryview
 * worker: implement _blockingreader.readinto() (issue6444)
 * worker: avoid potential partial write of pickled data

== Backwards Compatibility Changes ==
 * '''Removed Python 2 support''': this includes a lot of cleanup in our codebase, automation, testing, etc.
 * debugindex: rename to debugindex debug-revlog-index

== Miscellaneous ==

 * Fix typos and add missing items from documentation
 * dirstate-tree: optimize HashMap lookups with raw_entry_mut
 * Rust dependencies have been upgraded
 * revlog: rank computation is done by Rust when available
 * Improve discovery test tooling
 * Audit the number of queries done in discovery
 * Improved .hgignore of the mercurial-devel repository itself
 * Improve test coverage of dirstate-v2
 * rust-requirements: allow loading repos with `bookmarksinstore` requirement
 * Various Rust refactorings to help with revlog management
 * Improve debugability of Rust structs
 * Improve unit testing of the Rust dirstatemap
 * Improve robustness of the Rust dirstatemap to corruption
 * Improve changelog-v2 upgrade system