test: show how purge removes ignored directories Apparently the rust code path removes ignored directories even though the pure code path doesn't. Show this in tests.

contrib: add support for rhel9

packagelib: use python3 by default

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.

tests: work around libmagic bug in svn subrepo tests libmagic 5.40 introduced a bug [1] wherein ASCII text files with fewer than 3 distinct character values would be reported as binary data rather than as text. This bug was later fixed in version 5.41 [2]. SVN uses libmagic to determine the MIME type of added files with missing or unknown extensions [3]. This results in test failures on systems with libmagic 5.40 installed: $ echo a > a $ svn add a - A a + A (bin) a A simple workaround is to change the test file's content to include 3 distinct ASCII values (including the terminating newline). [1] https://bugs.astron.com/view.php?id=180 [2] https://bugs.astron.com/view.php?id=261 [3] https://svnbook.red-bean.com/en/1.8/svn.advanced.props.html#idm2649

revlog: make _partialmatch fail fast on almost-hex inputs Before this change, resolving a revision like [0123456789^] on a large repo can take multiple seconds because: - hg does not realize this is a revset, so it tries various things, including _partialmatch(b"0123456789^") - after the rust lookup fails, it falls back to pure hg - pure hg takes all-but-last chars and converts them to binary, which *succeeds*, so it does the expensive part.

perf-unbundle: add a perf command to time the unbundle operation Check documentation for details.

perf-bundle: accept --type argument

perf-bundle: accept --rev arguments This is fairly standard nowaday.

perf-bundle: add a new command to benchmark bundle creation time