relnotes/6.3

profiling: improve 3.12 error message for calling lsprof twice

Python 3.12 prevent lsprof to be enabled if it is already enabled. This break
the use of lsprof in `hg serve` as both the initial `serve` command and the
request serving want to profile.

The "stat" profiler (the default) does not have this problem, so we focus on
improving the error message for now.

= Mercurial 6.3.3 =

 * tests: filter out PEP 657 error locations in tracebacks (issue6780)
 * tests: optional PEP 657 error location in test-extension.t (issue6781)
 * tests: optional PEP 657 error location in test-lfs-serve-access.t (issue6782)
 * histedit: byteify the help for the multifold action
 * sparse: fix a py2 based usage of `map()`
 * convert: stop passing str to the dateutil API in darcs
 * convert: turn the last str regex into bytes in cvs.py (issue6789)
 * convert: change socket mode from b'r+' to 'rwb' in cvs.py (issue6789)
 * convert: replace repr() by pycompat.byterepr() in cvsps.py (issue6789)
 * tests: os module is frozen in Python 3.11 (issue6786)
 * hgweb: unbyteify the 100-continue check
 * resourceutil: start using importlib.resources.files() when possible
 * revset: the `random` sort should not depend on sys.maxsize (issue6770)
 * tests: make sure pygments can detect python script without extension
 * convert: brz 3.3.0 moved NoSuchFile exception to breezy.transport
 * tests: pygments 2.14+ highlight whitespace in python code
 * hghave: make different has_pyoxidizer functions have different names
 * hghave: refactor checks for pygments versions using checkvers()
 * rust-narrow: fix loop that never loops
 * scmutil: make checknewlabel() allow "_" in otherwise numeric names (issue6737)
 * bundlerepo: enforce the requirements declared by the underlying repository
 * setup: make the version computation process more resistant
 * fix: add more information to the debug output
 * tag: disallow tagging the working directory
 * dirstate: handle missing backup file on restoration
 * dirstate-v2: complain early on docket name collision
 * rust: upgrade minimum `rayon` dependency
 * setup: support building from an ongoing merge
 * rust: add debug log about skipping dirstate update
 * rust-dirstate: trace append/no append to help debugging
 * dirstate-v2: don't mmap the data file when on NFS
 * run-tests: make it possible to nest conditionals
 * dirstate: add some debug output when writing the dirstate
 * testing: introduce util function to synchronize concurrent commands on files
 * dirstate: add a way to test races happening during status
 * dirstate: use more than a bool to control append behavior
 * dirstate-v2: add devel config option to control write behavior
 * rhg: fix race when a fixup file is deleted on disk
 * rhg: fix race when an ambiguous file is deleted on disk
 * dirstate: deal with read-race for pure python code
 * dirstate: deal with read-race for python code using rust object
 * dirstate: deal with read-race for pure rust code path (rhg)
 * dirstate: set identity whenever we read the dirstate's v2 docket
 * rust-dirstate-v2: don't write dirstate if data file has changed
 * rhg: remember the inode of .hg/dirstate

= Mercurial 6.3.2 =

 * [ecfc84b956a8] tests: expect the message from 1baf0fffd82f in test-hghave.t (issue6762)
 * [5c095119bff4] tests: add the missing space to test-hghave.t (issue6762)
 * [2c346c1c75ec] tests: use an all too familiar executable in test-run-tests.t (issue6661)
 * [13c0e3b4fd35] tests: use `test -f` instead of `ls` to see if a file is present (issue6662)
 * [8ced4ca30ea1] bisect: correct message about aborting an in-progress bisect (issue6527)
 * filemerge: fix crash when using filesets in [partial-merge-tools]
 * help: fix a py3 error interpolating Set into b'%s'
 * match: make the FLAG_RE pattern a raw string
 * python-compat: adapt to Python 3.11 BC breakage with `random.sample`
 * rust-status: fix thread count ceiling
 * hg: show the correct message when cloning an LFS repo with extension disabled
 * extensions: process disabled external paths when `hgext` package is in-memory
 * emitrevision: consider ancestors revision to emit as available base
 * make: add a target for building pyoxidizer tests on macOS
 * run-tests: support --pyoxidized on macOS
 * packaging: add dependencies to the PyOxidizer build on macOS
 * Miscellaneous test fixes

= Mercurial 6.3.1 =

 * memory-usage: fix `hg log --follow --rev R F` space complexity (dcb2581e33be)
 * Improve portability and robustness of test harness
 * hg-core: relax dependencies pinning
 * matcher: fix issues regex flag contained in pattern (issue6759)
 * matcher: do not prepend '.*' to pattern using ^ after flags
 * packaging: refresh dependency hashes (issue6750)
 * cffi: fix a bytes vs str issue on macOS when listing directories
 * commit: properly consider file include and exclude options when closing branch
 * dirstate-v2: do not put the dirstate data file in a transaction

= Mercurial 6.3 =

== New Features ==

 * testlib: add `--raw-sha1` option to `f`
 * rhg: add `config.rhg` helptext
 * config: add alias from `hg help rhg` to `hg help rust`
 * rhg: add a config option to fall back immediately
 * bundle: introduce a --exact option
 * perf-bundle: add a new command to benchmark bundle creation time
 * perf-bundle: accept --rev arguments
 * perf-bundle: accept --type argument
 * perf-unbundle: add a perf command to time the unbundle operation
 * perf: introduce a benchmark for delta-find
 * contrib: add support for rhel9
 * phase-shelve: Implement a 'shelve.store' experimental config
 * debug-delta-find: introduce a quiet mode
 * sort-revset: introduce a `random` variant
 * phase: introduce a dedicated requirement for the `archived` phase
 * rebase: add boolean config item rebase.store-source
 * rhg: make [rhg status -v] work when it needs no extra output
 * rhg: support "!" syntax for disabling extensions
 * rhg: add debugrhgsparse command to help figure out bugs in rhg
 * rhg: add sparse support
 * rhg-status: add support for narrow clones
 * templates: add filter to reverse list
 * contrib: add pull_logger extension
 * revset: handle wdir() in `roots()`
 * revset: handle wdir() in `sort(..., -topo)`
 * rhg: support tweakdefaults
 * rhg: parallellize computation of [unsure_is_modified]

== Default Format Change ==

These changes affect newly created repositories (or new clones) done with
Mercurial 6.3.

== New Experimental Features ==

== Bug Fixes ==

 * shelve: demonstrate that the state is different across platforms (issue6735)
 * shelve: in test for trailing whitespace, strip commit (issue6735)
 * shelve: remove strip and rely on prior state (issue6735)
 * tests: fix http-bad-server expected errors for python 3.10 (issue6643)
 * status: let `--no-copies` override `ui.statuscopies`
 * releasenotes: use re.MULTILINE mode when checking admonitions
 * rhg: fallback to slow path on invalid patterns in hgignore
 * Fix a bunch of leftover str/bytes issues from Python 3 migration
 * keepalive: ensure `close_all()` actually closes all cached connections
 * lfs: fix blob corruption when tranferring with workers on posix
 * lfs: avoid closing connections when the worker doesn't fork
 * dirstate-v2: update constant that wasn't kept in sync
 * dirstate-v2: fix edge case where entries aren't sorted
 * upgrade: no longer keep all revlogs in memory at any point
 * rust-status: save new dircache even if just invalidated
 * dirstate-v2: hash the source of the ignore patterns as well
 * rhg: fallback when encountering ellipsis revisions
 * shelve: handle empty parents and nodestoremove in shelvedstate (issue6748)
 * profile: prevent a crash when line number is unknown
 * tags-fnode-cache: do not repeatedly open the filelog in a loop
 * tags-fnode-cache: skip building a changectx in getfnode
 * rust: create wrapper struct to reduce `regex` contention issues

== Backwards Compatibility Changes ==

 * chg worker processes will now correctly load per-repository configuration
   when given a both a relative `--repository` path and an alternate working
   directory via `--cwd`. A side-effect of this change is that these workers
   will now return an error if hg cannot find the current working directory,
   even when a different directory is specified via `--cwd`.
 * phase: rename the requirement for internal-phase from `internal-phase` to `use-internal-phase` (see 74fb1842f8b962cf03d7cd5b841dbcf2ae065587)

== Internal API Changes ==

== Miscellaneous ==

 * sslutil: use proper attribute to select python 3.7+
 * typing: suppress a few pyi-errors with more recent pytype
 * ci: bump pytype to 2022.03.29
 * bundlespec: add documentation about existing option
 * subrepo: avoid opening console window for non-native subrepos on Windows
 * setup: unconditionally enable the `long-paths-support` option on Windows
 * setup: use the full executable manifest from `python.exe`
 * tests: work around libmagic bug in svn subrepo tests
 * packagelib: use python3 by default
 * Improve `hg bisect` performance
 * perf: properly process formatter option in perf::unbundle
 * compare-disco: miscellaneous display improvements
 * fsmonitor: better compatibility with newer Pythons
 * revlog: finer computation of "issnapshot"
 * rhg: don't fallback if `strip` or `rebase` are activated
 * perf: make perf::bundle compatible before 61ba04693d65
 * perf: make perf::bundle compatible down to 5.2
 * perf-unbundle: improve compatibility
 * run-tests: display the time it took to install Mercurial
 * mergetools: don't let meld open all changed files on startup
 * dirstate-v2: skip evaluation of hgignore regex on cached directories