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packaging: modernize (compat PEP 517) with less distutils and setup.py calls...
packaging: modernize (compat PEP 517) with less distutils and setup.py calls - setup.py: less distutils imports and setuptools required distutils is deprecated and one should import commands from setuptools to support modern workflows depending on PEP 517 and 518. Moreover, for Python >=3.12, distutils comes from setuptools. It corresponds to old and unmaintain code that do not support PEP 517. The PEP 517 frontends (pip, build, pipx, PDM, UV, etc.) are responsible for creating a venv just for the build. The build dependencies (currently only setuptools) are specified in the pyproject.toml file. Therefore, there is no reason to support building without setuptools. Calling directly setup.py is deprecated and we have to use a PEP 517 frontend. For this commit we use pip with venv. - run-tests.py: install with pip instead of direct call of setup.py Mercurial is then built in an isolated environment. - Makefile: use venv+pip instead of setup.py

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test-racy-mutations.t
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/ tests / test-racy-mutations.t
#testcases skip-detection fail-if-detected
Test situations that "should" only be reproducible:
- on networked filesystems, or
- user using `hg debuglocks` to eliminate the lock file, or
- something (that doesn't respect the lock file) writing to the .hg directory
while we're running
Initial setup
-------------
$ hg init base-repo
$ cd base-repo
$ cat > "$TESTTMP_FORWARD_SLASH/waitlock_editor.sh" <<EOF
> [ -n "\${WAITLOCK_ANNOUNCE:-}" ] && touch "\${WAITLOCK_ANNOUNCE}"
> f="\${WAITLOCK_FILE}"
> start=\`date +%s\`
> timeout=20
> "$RUNTESTDIR_FORWARD_SLASH/testlib/wait-on-file" "\$timeout" "\$f"
> if [ \$# -gt 1 ]; then
> cat "\$@"
> fi
> EOF
Things behave differently if we don't already have a 00changelog.i file when
this all starts, so let's make one.
$ echo r0 > r0
$ hg commit -qAm 'r0'
$ cd ..
$ cp -R base-repo main-client
$ cp -R base-repo racing-client
$ mkdir sync
$ EDITOR_STARTED="$TESTTMP_FORWARD_SLASH/sync/.editor_started"
$ MISCHIEF_MANAGED="$TESTTMP_FORWARD_SLASH/sync/.mischief_managed"
$ JOBS_FINISHED="$TESTTMP_FORWARD_SLASH/sync/.jobs_finished"
Actual test
-----------
Start an hg commit that will take a while
$ cd main-client
#if fail-if-detected
$ cat >> $HGRCPATH << EOF
> [debug]
> revlog.verifyposition.changelog = fail
> EOF
#endif
$ echo foo > foo
$ (
> unset HGEDITOR;
> WAITLOCK_ANNOUNCE="${EDITOR_STARTED}" \
> WAITLOCK_FILE="${MISCHIEF_MANAGED}" \
> hg commit -qAm 'r1 (foo)' --edit foo \
> --config ui.editor="sh $TESTTMP/waitlock_editor.sh" \
> > .foo_commit_out 2>&1 ;\
> touch "${JOBS_FINISHED}"
> ) &
Wait for the "editor" to actually start
$ sh "$RUNTESTDIR_FORWARD_SLASH/testlib/wait-on-file" 20 "${EDITOR_STARTED}"
Do a concurrent edition
$ cd ../racing-client
$ touch ../pre-race
$ sleep 10
$ echo bar > bar
$ hg --repository ../racing-client commit -qAm 'r2 (bar)' bar
$ hg --repository ../racing-client debugrevlogindex -c
rev linkrev nodeid p1 p2
0 0 222799e2f90b 000000000000 000000000000
1 1 6f124f6007a0 222799e2f90b 000000000000
$ hg --repository ../racing-client debugrevlogindex -m
rev linkrev nodeid p1 p2
0 0 7b7020262a56 000000000000 000000000000
1 1 ad3fe36d86d9 7b7020262a56 000000000000
We simulate an network FS race by overwriting raced repo content with the new
content of the files changed in the racing repository
$ for x in `find . -type f -newer ../pre-race`; do
> cp $x ../main-client/$x
> done
$ cd ../main-client
Awaken the editor from that first commit
$ touch "${MISCHIEF_MANAGED}"
And wait for it to finish
$ WAITLOCK_FILE="${JOBS_FINISHED}" sh "$TESTTMP_FORWARD_SLASH/waitlock_editor.sh"
#if skip-detection
(Ensure there was no output)
$ cat .foo_commit_out
And observe a corrupted repository -- rev 2's linkrev is 1, which should never
happen for the changelog (the linkrev should always refer to itself).
$ hg debugrevlogindex -c
rev linkrev nodeid p1 p2
0 0 222799e2f90b 000000000000 000000000000
1 1 6f124f6007a0 222799e2f90b 000000000000
2 1 ac80e6205bb2 222799e2f90b 000000000000
TODO: Figure out why the middle entry is missing on Windows.
$ hg debugrevlogindex -m
rev linkrev nodeid p1 p2
0 0 7b7020262a56 000000000000 000000000000
1 1 ad3fe36d86d9 7b7020262a56 000000000000 (no-windows !)
2 1 d93163bb8ce3 7b7020262a56 000000000000 (no-windows !)
1 1 d93163bb8ce3 7b7020262a56 000000000000 (windows !)
#endif
#if fail-if-detected
$ cat .foo_commit_out
note: commit message saved in .hg/last-message.txt
note: use 'hg commit --logfile .hg/last-message.txt --edit' to reuse it
transaction abort!
rollback completed
abort: 00changelog.i: file cursor at position 128, expected 64
And no corruption in the changelog.
$ hg debugrevlogindex -c
rev linkrev nodeid p1 p2
0 0 222799e2f90b 000000000000 000000000000
1 1 6f124f6007a0 222799e2f90b 000000000000 (missing-correct-output !)
And, because of transactions, there's none in the manifestlog either.
TODO: Figure out why this is different on Windows.
$ hg debugrevlogindex -m
rev linkrev nodeid p1 p2
0 0 7b7020262a56 000000000000 000000000000
1 1 ad3fe36d86d9 7b7020262a56 000000000000 (no-windows !)
1 1 ad3fe36d86d9 7b7020262a56 000000000000 (missing-correct-output windows !)
#endif