Mercurial 6.4rc0

This is an early-candidate release. Any aspect of the following is still subject to change.

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

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