Mercurial > hg
view tests/test-blackbox.t @ 42044:bb271ec2fbfb
compression: introduce a `storage.revlog.zstd.level` configuration
This option control the zstd compression level used when compressing revlog
chunk. The usage of zstd for revlog compression has not graduated from
experimental yet, but we intend to fix that soon.
The option name for the compression level is more straight forward to pick, so
this changesets comes first. Having a dedicated option for each compression
engine is useful because they don't support the same range of values.
I ran the same measurement as for the zlib compression level (in the parent
changesets). The variation in repository size is stay mostly in the same (small)
range. The "read/write" performance see smallish variation, but are overall much
better than zlib. Write performance show the same tend of having better write
performance for when reaching high-end compression.
Again, we don't intend to change the default zstd compression level (currently:
3) in this series. However this is worth investigating in the future.
The Performance comparison of zlib vs zstd is quite impressive. The repository
size stay in the same range, but the performance are much better in all
situations.
Comparison summary
==================
We are looking at:
- performance range for zlib
- performance range for zstd
- comparison of default zstd (level-3) to default zlib (level 6)
- comparison of the slowest zstd time to the fastest zlib time
Read performance:
-----------------
| zlib | zstd | cmp | f2s
mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88%
pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63%
netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73%
mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71%
Write performance:
------------------
| zlib | zstd | cmp | f2s
mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86%
pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65%
netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82%
mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80%
Raw data
--------
repo alg lvl .hg/store size 00manifest.d read write
mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304
mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320
mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612
mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025
mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142
mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875
mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489
mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286
mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407
mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460
pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984
pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158
pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918
pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409
pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509
pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219
pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239
pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332
pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827
pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218
netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316
netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400
netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064
netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311
netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087
netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626
netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602
netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652
netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349
netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655
mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721
mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093
mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002
mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751
mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805
mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906
mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202
mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683
mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389
mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 27 Mar 2019 18:35:59 +0100 |
parents | 19d8d6856338 |
children | bb135a784b70 |
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setup $ cat > myextension.py <<EOF > from mercurial import error, registrar > cmdtable = {} > command = registrar.command(cmdtable) > @command(b'crash', [], b'hg crash') > def crash(ui, *args, **kwargs): > raise Exception("oops") > @command(b'abort', [], b'hg abort') > def abort(ui, *args, **kwargs): > raise error.Abort(b"oops") > EOF $ abspath=`pwd`/myextension.py $ cat >> $HGRCPATH <<EOF > [extensions] > blackbox= > mock=$TESTDIR/mockblackbox.py > mq= > myextension=$TESTTMP/myextension.py > [alias] > confuse = log --limit 3 > so-confusing = confuse --style compact > [blackbox] > track = backupbundle, branchcache, command, commandalias, commandexception, > commandfinish, debug, exthook, incoming, pythonhook, tagscache > EOF $ hg init blackboxtest $ cd blackboxtest command, exit codes, and duration $ echo a > a $ hg add a $ hg blackbox --config blackbox.dirty=True 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> init blackboxtest exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> add a 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> add a exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000+ (5000)> blackbox --config *blackbox.dirty=True* (glob) failure exit code $ rm ./.hg/blackbox.log $ hg add non-existent non-existent: $ENOENT$ [1] $ hg blackbox 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> add non-existent 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> add non-existent exited 1 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox abort exit code $ rm ./.hg/blackbox.log $ hg abort 2> /dev/null [255] $ hg blackbox -l 2 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> abort exited 255 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox -l 2 unhandled exception $ rm ./.hg/blackbox.log $ hg crash 2> /dev/null [1] $ hg blackbox -l 2 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> crash exited 1 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox -l 2 alias expansion is logged $ rm ./.hg/blackbox.log $ hg confuse $ hg blackbox 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> confuse 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> alias 'confuse' expands to 'log --limit 3' 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> confuse exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox recursive aliases work correctly $ rm ./.hg/blackbox.log $ hg so-confusing $ hg blackbox 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> so-confusing 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> alias 'so-confusing' expands to 'confuse --style compact' 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> alias 'confuse' expands to 'log --limit 3' 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> so-confusing exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox custom date format $ rm ./.hg/blackbox.log $ hg --config blackbox.date-format='%Y-%m-%d @ %H:%M:%S' \ > --config devel.default-date='1334347993 0' --traceback status A a $ hg blackbox 2012-04-13 @ 20:13:13 bob @0000000000000000000000000000000000000000 (5000)> --config *blackbox.date-format=%Y-%m-%d @ %H:%M:%S* --config *devel.default-date=1334347993 0* --traceback status (glob) 2012-04-13 @ 20:13:13 bob @0000000000000000000000000000000000000000 (5000)> --config *blackbox.date-format=%Y-%m-%d @ %H:%M:%S* --config *devel.default-date=1334347993 0* --traceback status exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox incoming change tracking create two heads to verify that we only see one change in the log later $ hg commit -ma $ hg up null 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo b > b $ hg commit -Amb adding b created new head clone, commit, pull $ hg clone . ../blackboxtest2 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo c > c $ hg commit -Amc adding c $ cd ../blackboxtest2 $ hg pull pulling from $TESTTMP/blackboxtest searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets d02f48003e62 (run 'hg update' to get a working copy) $ hg blackbox -l 6 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> pull 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> updated served branch cache in * seconds (glob) 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> wrote served branch cache with 1 labels and 2 nodes 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> 1 incoming changes - new heads: d02f48003e62 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> pull exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> blackbox -l 6 we must not cause a failure if we cannot write to the log $ hg rollback repository tip rolled back to revision 1 (undo pull) $ mv .hg/blackbox.log .hg/blackbox.log- $ mkdir .hg/blackbox.log $ hg --debug incoming warning: cannot write to blackbox.log: * (glob) comparing with $TESTTMP/blackboxtest query 1; heads searching for changes all local heads known remotely changeset: 2:d02f48003e62c24e2659d97d30f2a83abe5d5d51 tag: tip phase: draft parent: 1:6563da9dcf87b1949716e38ff3e3dfaa3198eb06 parent: -1:0000000000000000000000000000000000000000 manifest: 2:ab9d46b053ebf45b7996f2922b9893ff4b63d892 user: test date: Thu Jan 01 00:00:00 1970 +0000 files+: c extra: branch=default description: c $ hg pull pulling from $TESTTMP/blackboxtest searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets d02f48003e62 (run 'hg update' to get a working copy) a failure reading from the log is fatal $ hg blackbox -l 3 abort: *$TESTTMP/blackboxtest2/.hg/blackbox.log* (glob) [255] $ rmdir .hg/blackbox.log $ mv .hg/blackbox.log- .hg/blackbox.log backup bundles get logged $ touch d $ hg commit -Amd adding d created new head $ hg strip tip 0 files updated, 0 files merged, 1 files removed, 0 files unresolved saved backup bundle to $TESTTMP/blackboxtest2/.hg/strip-backup/*-backup.hg (glob) $ hg blackbox -l 6 1970/01/01 00:00:00 bob @73f6ee326b27d820b0472f1a825e3a50f3dc489b (5000)> strip tip 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> saved backup bundle to $TESTTMP/blackboxtest2/.hg/strip-backup/73f6ee326b27-7612e004-backup.hg 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> updated base branch cache in * seconds (glob) 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> wrote base branch cache with 1 labels and 2 nodes 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> strip tip exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> blackbox -l 6 extension and python hooks - use the eol extension for a pythonhook $ echo '[extensions]' >> .hg/hgrc $ echo 'eol=' >> .hg/hgrc $ echo '[hooks]' >> .hg/hgrc $ echo 'update = echo hooked' >> .hg/hgrc $ hg update The fsmonitor extension is incompatible with the eol extension and has been disabled. (fsmonitor !) hooked 1 files updated, 0 files merged, 0 files removed, 0 files unresolved updated to "d02f48003e62: c" 1 other heads for branch "default" $ cat >> .hg/hgrc <<EOF > [extensions] > # disable eol, because it is not needed for subsequent tests > # (in addition, keeping it requires extra care for fsmonitor) > eol=! > EOF $ hg blackbox -l 5 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> update (no-chg !) 1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> pythonhook-preupdate: hgext.eol.preupdate finished in * seconds (glob) 1970/01/01 00:00:00 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> exthook-update: echo hooked finished in * seconds (glob) 1970/01/01 00:00:00 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> update exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> serve --cmdserver chgunix --address $TESTTMP.chgsock/server.* --daemon-postexec 'chdir:/' (glob) (chg !) 1970/01/01 00:00:00 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> blackbox -l 5 log rotation $ echo '[blackbox]' >> .hg/hgrc $ echo 'maxsize = 20 b' >> .hg/hgrc $ echo 'maxfiles = 3' >> .hg/hgrc $ hg status $ hg status $ hg status $ hg tip -q 2:d02f48003e62 $ ls .hg/blackbox.log* .hg/blackbox.log .hg/blackbox.log.1 .hg/blackbox.log.2 $ cd .. $ hg init blackboxtest3 $ cd blackboxtest3 $ hg blackbox 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> init blackboxtest3 exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> blackbox $ mv .hg/blackbox.log .hg/blackbox.log- $ mkdir .hg/blackbox.log $ sed -e 's/\(.*test1.*\)/#\1/; s#\(.*commit2.*\)#os.rmdir(".hg/blackbox.log")\ > os.rename(".hg/blackbox.log-", ".hg/blackbox.log")\ > \1#' $TESTDIR/test-dispatch.py > ../test-dispatch.py $ "$PYTHON" $TESTDIR/blackbox-readonly-dispatch.py running: --debug add foo warning: cannot write to blackbox.log: Is a directory (no-windows !) warning: cannot write to blackbox.log: $TESTTMP/blackboxtest3/.hg/blackbox.log: Access is denied (windows !) adding foo result: 0 running: --debug commit -m commit1 -d 2000-01-01 foo warning: cannot write to blackbox.log: Is a directory (no-windows !) warning: cannot write to blackbox.log: $TESTTMP/blackboxtest3/.hg/blackbox.log: Access is denied (windows !) committing files: foo committing manifest committing changelog updating the branch cache committed changeset 0:0e46349438790c460c5c9f7546bfcd39b267bbd2 result: 0 running: --debug commit -m commit2 -d 2000-01-02 foo committing files: foo committing manifest committing changelog updating the branch cache committed changeset 1:45589e459b2edfbf3dbde7e01f611d2c1e7453d7 result: 0 running: --debug log -r 0 changeset: 0:0e46349438790c460c5c9f7546bfcd39b267bbd2 phase: draft parent: -1:0000000000000000000000000000000000000000 parent: -1:0000000000000000000000000000000000000000 manifest: 0:9091aa5df980aea60860a2e39c95182e68d1ddec user: test date: Sat Jan 01 00:00:00 2000 +0000 files+: foo extra: branch=default description: commit1 result: 0 running: --debug log -r tip changeset: 1:45589e459b2edfbf3dbde7e01f611d2c1e7453d7 tag: tip phase: draft parent: 0:0e46349438790c460c5c9f7546bfcd39b267bbd2 parent: -1:0000000000000000000000000000000000000000 manifest: 1:895aa9b7886f89dd017a6d62524e1f9180b04df9 user: test date: Sun Jan 02 00:00:00 2000 +0000 files: foo extra: branch=default description: commit2 result: 0 $ hg blackbox 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> updating the branch cache 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> updated served branch cache in * seconds (glob) 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> wrote served branch cache with 1 labels and 1 nodes 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug commit -m commit2 -d 2000-01-02 foo exited 0 after *.?? seconds (glob) 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r 0 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> writing .hg/cache/tags2-visible with 0 tags 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r 0 exited 0 after *.?? seconds (glob) 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r tip 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r tip exited 0 after *.?? seconds (glob) 1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> blackbox Test log recursion from dirty status check $ cat > ../r.py <<EOF > from mercurial import context, error, extensions > x=[False] > def status(orig, *args, **opts): > args[0].repo().ui.log(b"broken", b"recursion?") > return orig(*args, **opts) > def reposetup(ui, repo): > extensions.wrapfunction(context.basectx, 'status', status) > EOF $ hg id --config extensions.x=../r.py --config blackbox.dirty=True 45589e459b2e tip cleanup $ cd .. Test missing log directory, which shouldn't be created automatically $ cat <<'EOF' > closeremove.py > def reposetup(ui, repo): > class rmrepo(repo.__class__): > def close(self): > super(rmrepo, self).close() > self.ui.debug(b'removing %s\n' % self.vfs.base) > self.vfs.rmtree() > repo.__class__ = rmrepo > EOF $ hg init gone $ cd gone $ cat <<'EOF' > .hg/hgrc > [extensions] > closeremove = ../closeremove.py > EOF $ hg log --debug removing $TESTTMP/gone/.hg warning: cannot write to blackbox.log: $ENOENT$ (no-windows !) warning: cannot write to blackbox.log: $TESTTMP/gone/.hg/blackbox.log: $ENOTDIR$ (windows !) $ cd .. blackbox should disable itself if track is empty $ hg --config blackbox.track= init nothing_tracked $ cd nothing_tracked $ cat >> .hg/hgrc << EOF > [blackbox] > track = > EOF $ hg blackbox $ cd $TESTTMP a '*' entry in blackbox.track is interpreted as log everything $ hg --config blackbox.track='*' \ > --config blackbox.logsource=True \ > init track_star $ cd track_star $ cat >> .hg/hgrc << EOF > [blackbox] > logsource = True > track = * > EOF (only look for entries with specific logged sources, otherwise this test is pretty brittle) $ hg blackbox | egrep '\[command(finish)?\]' 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000) [commandfinish]> --config *blackbox.track=* --config *blackbox.logsource=True* init track_star exited 0 after * seconds (glob) 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000) [command]> blackbox $ cd $TESTTMP #if chg when using chg, blackbox.log should get rotated correctly $ cat > $TESTTMP/noop.py << EOF > from __future__ import absolute_import > import time > from mercurial import registrar, scmutil > cmdtable = {} > command = registrar.command(cmdtable) > @command('noop') > def noop(ui, repo): > pass > EOF $ hg init blackbox-chg $ cd blackbox-chg $ cat > .hg/hgrc << EOF > [blackbox] > maxsize = 500B > [extensions] > # extension change forces chg to restart > noop=$TESTTMP/noop.py > EOF $ "$PYTHON" -c 'print("a" * 400)' > .hg/blackbox.log $ chg noop $ chg noop $ chg noop $ chg noop $ chg noop $ cat > showsize.py << 'EOF' > import os > import sys > limit = 500 > for p in sys.argv[1:]: > size = os.stat(p).st_size > if size >= limit: > desc = '>=' > else: > desc = '<' > print('%s: %s %d' % (p, desc, limit)) > EOF $ "$PYTHON" showsize.py .hg/blackbox* .hg/blackbox.log: < 500 .hg/blackbox.log.1: >= 500 .hg/blackbox.log.2: >= 500 $ cd .. With chg, blackbox should not create the log file if the repo is gone $ hg init repo1 $ hg --config extensions.a=! -R repo1 log $ rm -rf $TESTTMP/repo1 $ hg --config extensions.a=! init repo1 #endif blackbox should work if repo.ui.log is not called (issue5518) $ cat > $TESTTMP/raise.py << EOF > from __future__ import absolute_import > from mercurial import registrar, scmutil > cmdtable = {} > command = registrar.command(cmdtable) > @command(b'raise') > def raisecmd(*args): > raise RuntimeError('raise') > EOF $ cat >> $HGRCPATH << EOF > [blackbox] > track = commandexception > [extensions] > raise=$TESTTMP/raise.py > EOF $ hg init $TESTTMP/blackbox-exception-only $ cd $TESTTMP/blackbox-exception-only #if chg (chg exits 255 because it fails to receive an exit code) $ hg raise 2>/dev/null [255] #else (hg exits 1 because Python default exit code for uncaught exception is 1) $ hg raise 2>/dev/null [1] #endif $ head -1 .hg/blackbox.log 1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> ** Unknown exception encountered with possibly-broken third-party extension mock $ tail -2 .hg/blackbox.log RuntimeError: raise