= Mercurial 6.4.2 =

Exceptional bugfix release due to a corruption bug that happens when using

clonebundles on repositories with large files.

 * revlog-split: make sure the self._indexfile attribute is reset (issue6811)

= Mercurial 6.4.1 =

 * rhg: fix a bug in path encoding

 * rhg: don't crash on empty directory names in path_encode, just in case

 * commands: correct documentation of hg serve’s --ipv6 options

 * run-tests: remove obsolete coverage check and packaging import (issue6805)

 * chg: populate CHGHG if not set

 * match: sort patterns before compiling them into a regex

 * match: match explicit file using a set

 * rebase: do not cleanup the working copy when --dry-run is used (issue6802)

 * sslutil: set context security level for legacy tls testing (issue6760)

= Mercurial 6.4 =

== New Features ==

 * There is a new internal merge tool called `internal:union-other-first`.

   It works like `internal:union` but add other side on top of local.

 * Pullbundles are enabled by default

 * delta-find: add a way to control the number of bases tested at the same time

 * changelog-v2: add a configuration to disable rank computation

 * debug: add an option to display statistic about a bundling operation

 * debug: add an option to display statistic about a unbundling operation

 * delta-find: add a delta-reuse policy that blindly accepts incoming deltas

 * debug: add debug-revlog-stats command

 * dirstate: add narrow support to `verify`

 * verify: also check dirstate

 * commit: add --draft option to use draft phase

 * amend: add a --draft option to set phase to draft

 * debug: add a config to abort update early

 * rhg: implement checkexec to support weird filesystems

 * debugshell: allow commands to be specified as a CLI argument

 * rhg-files: add support for narrow when specifying a revision

 * rust-narrow: enable narrow support for plain `rhg files`

== Bug Fixes ==

Aside from the following (unordered) commits which made it through a manual filter, there are a bunch of typing improvements and fixes, removal of deprecated code and general code cleanup.

 * lfs: improve an exception message for blob corruption detected on transfer

 * revlog: use the user facing filename as the display_id for filelogs

 * rust-status: query fs traversal metadata lazily

 * shelve: add Shelf.changed_files for resolving changed files in a plugin

 * demandimport: ensure lazyloaderex sets loader attributes (issue6725)

 * typing: fix a syntax error in mercurial/cext/bdiff.pyi

 * cffi: fix a bytes vs str issue on macOS when listing directories

 * changelog-v2: fix the docket `struct`

 * schemes: fix a broken check for drive letter conflicts

 * worker: avoid reading 1 byte at a time from the OS pipe

 * rust-narrow: fix loop that never loops

 * setup: Ensure target directory exists with building rust extension

 * dirstate: invalidate changes when parent-change fails

 * dirstate: warn about non-explicitly rolledback parent-change

 * dirstate: write dirstate on successful exit of changing_parents context

 * largefile: make sure we hold the lock when updating the second dirstate

 * dirstate: enforce holding the lock while doing any changes

 * run-tests: stop ignoring venv-installed packages

 * transaction: run abort callback in all cases

 * transaction: quietly rollback if no other changes than temporary files

 * debugrebuilddirstate: double check that no transaction is open

 * dirstate: do not write an empty dirstate just for backup

 * locking: take the `wlock` for the full `hg add` duration

 * locking: take the `wlock` for the full `hg remove` duration

 * locking: take the `wlock` for the full `hg forget` duration

 * locking: take the `wlock` for the full `hg addremove` duration

 * locking: grab the wlock before touching the dirstate in `perfdirstatewrite`

 * locking: hold the wlock for the full duration of the "keyword demo"

 * mq: properly take the wlock during the full qfold operation

 * dirstate: invalidate the dirstate change on transaction failure

 * status: fix post status writing

 * status: fix post status invalidation

 * dirstate: avoid transaction backup/restore if we do not hold the lock

 * rollback: explicitly skip dirstate rollback when applicable

 * dirstate-guard: remove the feature

 * dirstate: make `restorebackup` more robust when it is a noop

 * dirstate: generalize the dirstate's invalidation on transaction abort

 * dirstate: detect potential fishy transaction patterns while changing

 * mq: write the dirstate before stripping

 * dirstate: explicitly backup the datafile

 * localrepo: enforce a clean dirstate when the transaction open

 * localrepo: "blindly" do a dirstate backup at the end of the transaction

 * dirstate: remove the dedicated backup logic

 * rhg: fix a bug in path_encode

 * dirstate: invalidate on all exceptions

 * large-files: make sure we write newly initialized standin file early

 * dirstate: warn if dirty when starting an edition

 * dirstate: track that changes are pending in a transaction

 * dirstate: distinct transaction callback from largefile

 * automv: lock the repository before searching for renames

 * dirstate: only reload the dirstate when it may have changed

 * dirstate: cleanup the `_map` property cache

 * status: invalidate dirstate  on LockError

 * dirstate: check that dirstate is clean at the initial context opening

 * dirstate: have `running_status` write the dirstate when holding the lock

 * dirstate: have `running_status` warn when exiting with a dirty dirstate

 * narrow: widden the lock context in `tracking`

 * narrow: enforce that narrow spec is written within a transaction

 * transaction: no longer explicitly cache phaseroots

 * transaction: no longer explicitly cache bookmarks

 * transaction: use the standard transaction mechanism to backup branch

 * bundlerepo: handle changegroup induced phase movement in the associated method

 * bundlerepo: apply phase data stored in the bundle instead of assuming `draft`

 * config-item: declare undeclared path suboption

 * narrow: read pending file when applicable

 * rust: fix building on macOS (issue6801)

 * run-tests: fix a crash when using the coverage options

 * undo-files: also remove the undo.backupfiles

 * undo-files: cleanup backup when cleaning undos

 * undo-files: clean existing files up before writing new one

 * undo-files: cleanup legacy files when applicable

 * dirstate-v2: fix an incorrect handling of readdir errors

 * rust: update zstd dependency

 * rust: upgrade `rayon` dependency

 * dirstate: fix the bug in [status] dealing with committed&ignored directories

 * dirstate: fix a potential traceback when in `copy` and `rename`

 * histedit: fix diff colors

 * cext: fix for PyLong refactoring in CPython 3.12

 * py3: fix for Python 3.12 emitting SyntaxWarning on invalid escape sequences

 * statprof: with Python 3.12, lineno is (more) often None

 * transaction: properly clean up backup file outside of .hg/store/

 * transaction: raise on backup restoration error

 * revlog: improve the robustness of the splitting process

 * debugdeltachain: stop summing the same chain over and over

 * url: don't ignore timeout for https connections

 * py3: fix for Python 3.12 emitting SyntaxWarning on invalid escape sequences

 * tests: accept a test output change in [tests/test-serve.t]

 * rust: fix thread cap (for real this time)

 * dirstate: try refreshing the changelog when parent are unknown

 * hooks: invalidate the repo after the hooks

== Backwards Compatibility Changes ==

 * rust: upgrade supported Rust toolchain version

 * rust: move all crates in the main workspace to edition 2021

 * hg-core: upgrade `zstd` dependency

 * hg-core: upgrade `clap` dependency

 * hg-core: upgrade all remaining dependencies

 * hg-cpython: upgrade dependencies

 * rhg: upgrade `clap` dependency

 * rhg: upgrade the remainder of the dependencies

== Internal API Changes ==

 * Many APIs around the dirstate have been made much stricter with regards to

   locking and transaction handling

 * Some dirstate APIs have been renamed/removed

 * In both cases, you should get loud complaints in your tests if you do

   something wrong.

== Miscellaneous ==

 * pullbundle support no longer requires setting a server-side option,

   providing a .hg/pullbundles.manifest according to the syntax specified in

   'hg help -e clonebundles' is enough.

 * debug-delta-find: add a --source option

 * delta-find: add debug information about reuse of cached data

 * delta-find: set the default candidate chunk size to 10

 * attr: vendor 22.1.0

 * configitems: add a default value for "merge-tools.xxx.regappend"

 * debugrevlog: display total stored information

 * emitrevision: if we need to compute a delta on the fly, try p1 or p2 first

 * emitrevision: consider ancestors revision to emit as available base

 * find-delta: pass the cache-delta usage policy alongside the cache-delta

 * delta-find: use a smarter object for snapshot caching

 * delta-find: use sets instead of list in the snapshot cache

 * delta-find: make sure we only use newer full snapshot as candidate

 * delta-find: use a single snapshot cache when applying a group to an object

 * bundleoperation: optionnaly record the `remote` that produced the bundle

 * bundle: when forcing acceptance of incoming delta also accept snapshot

 * bundle: emit full snapshot as is, without doing a redelta

 * pathutil: slightly faster path audit in the common case

 * merge: don't pay for pathconflicts if there are none

 * merge: short-circuit the _checkfs loop upon getting ENOENT

 * merge: disable the whole filesystem access loop if [_realfs] is false

 * merge: cache the fs checks made during [_checkunknownfiles]

 * rust: use `logging_timer` instead of `micro_timer`

 * rust: run `cargo clippy`

 * makefile: add `cargo clippy` to tests if cargo is available

 * heptapod-ci: add `clippy` to the CI

 * convert: use a priority queue for sorting commits, to make sorting faster

 * delta-find: adjust the default candidate group chunk size

 * delta-find: declare the "paths..*:pulled-delta-reuse-policy option