view tests/test-blackbox.t @ 51977:42a116f1cdc1

branchmap-v3: introduce a "stop_rev" argument to `headsrevs`

The `headsrevs` method of the revlog already have a `revs` argument to compute
the headrevs of a limited set of heads. However, it disable the use of the
native compiled code to compute the heads, which slows down the branchmap v3
code a lot.

The branchmap v3 usage is actually quite constrained as we will always only
ignores a part at the top of the graph. So we could be significantly faster.

We start by making small change to the python side to improve the situation and
introduce the new API. More collaboration with the native code are coming later.

This massively speedup operation and close most of the remaining gaps between
branchmap-v3 and branchmap-v2. especially on repository with many revs like
mozilla-try. A small overhead remains mostly because the `headrevs` logic
currently has some inefficiently. We will look into them from there.

### benchmark.name                                 = hg.command.unbundle
  # bin-env-vars.hg.py-re2-module                  = default
  # benchmark.variants.issue6528                   = disabled
  # benchmark.variants.resource-usage              = default
  # benchmark.variants.reuse-external-delta-parent = yes
  # benchmark.variants.revs                        = any-1-extra-rev
  # benchmark.variants.source                      = unbundle
  # benchmark.variants.validate                    = default
  # benchmark.variants.verbosity                   = quiet

 ## data-env-vars.name                             = netbeans-2018-08-01-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.233711  ~~~~~
branch-v3 before: 0.368769  (+57.79%, +0.14)
branch-v3 after:  0.239857   (+2.63%, +0.01)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.235230  ~~~~~
branch-v3 before: 0.372460  (+58.34%, +0.14)
branch-v3 after:  0.240972   (+2.44%, +0.01)
 ## data-env-vars.name                             = netbeans-2018-08-01-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.255586  ~~~~~
branch-v3 before: 0.318907  (+24.78%, +0.06)
branch-v3 after:  0.268560   (+5.08%, +0.01)

 ## data-env-vars.name                             = mozilla-central-2024-03-22-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.339010  ~~~~~
branch-v3 before: 0.349752   (+3.17%, +0.01)
branch-v3 after:  0.349389   (+3.06%, +0.01)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.346525  ~~~~~
branch-v3 before: 0.354300   (+2.24%, +0.01)
branch-v3 after:  0.355661   (+2.64%, +0.01)
 ## data-env-vars.name                             = mozilla-central-2024-03-22-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.380202  ~~~~~
branch-v3 before: 0.396293   (+4.23%, +0.02)
branch-v3 after:  0.408851   (+7.54%, +0.03)

 ## data-env-vars.name                             = mozilla-unified-2024-03-22-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        0.412165  ~~~~~
branch-v3 before: 0.424769   (+3.06%, +0.01)
branch-v3 after:  0.427782   (+3.79%, +0.02)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.412397  ~~~~~
branch-v3 before: 0.421796   (+2.28%, +0.01)
branch-v3 after:  0.422354   (+2.41%, +0.01)
 ## data-env-vars.name                             = mozilla-unified-2024-03-22-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        0.429501  ~~~~~
branch-v3 before: 0.443849   (+3.34%, +0.01)
branch-v3 after:  0.443197   (+3.19%, +0.01)

 ## data-env-vars.name                             = mozilla-try-2024-03-26-zstd-sparse-revlog
  # bin-env-vars.hg.flavor                         = default
branch-v2:        3.403171  ~~~~~
branch-v3 before: 6.234055  (+83.18%, +2.83)
branch-v3 after:  3.819477  (+12.23%, +0.42)
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        3.454876  ~~~~~
branch-v3 before: 6.307813  (+82.58%, +2.85)
branch-v3 after:  3.590284   (+3.92%, +0.14)
 ## data-env-vars.name                             = mozilla-try-2024-03-26-ds2-pnm
  # bin-env-vars.hg.flavor                         = rust
branch-v2:        3.465435  ~~~~~
branch-v3 before: 5.176076  (+49.36%, +1.71)
branch-v3 after:  3.633278   (+4.84%, +0.17)

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'abortcmd', [], b'hg abortcmd')
  > 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
  > 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 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> init blackboxtest exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> add a
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> add a exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 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 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> add non-existent
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> add non-existent exited 1 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> blackbox

abort exit code
  $ rm ./.hg/blackbox.log
  $ hg abortcmd 2> /dev/null
  [255]
  $ hg blackbox -l 2
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> abortcmd exited 255 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> blackbox -l 2

unhandled exception
  $ rm ./.hg/blackbox.log
#if chg
 (chg exits 255 because it fails to receive an exit code)
  $ hg crash 2>/dev/null
  [255]
#else
 (hg exits 1 because Python default exit code for uncaught exception is 1)
  $ hg crash 2>/dev/null
  [1]
#endif
  $ hg blackbox -l 2
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> crash exited 1 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> blackbox -l 2

alias expansion is logged
  $ rm ./.hg/blackbox.log
  $ hg confuse
  $ hg blackbox
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> confuse
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> alias 'confuse' expands to 'log --limit 3'
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> confuse exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> blackbox

recursive aliases work correctly
  $ rm ./.hg/blackbox.log
  $ hg so-confusing
  $ hg blackbox
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> so-confusing
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> alias 'so-confusing' expands to 'confuse --style compact'
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> alias 'confuse' expands to 'log --limit 3'
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> so-confusing exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 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 00:00:00.000 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 4
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> wrote branch cache (served) with 1 labels and 2 nodes
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> 1 incoming changes - new heads: d02f48003e62
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> pull exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> blackbox -l 4

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 changesets 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 4
  1970-01-01 00:00:00.000 bob @73f6ee326b27d820b0472f1a825e3a50f3dc489b (5000)> strip tip
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> saved backup bundle to $TESTTMP/blackboxtest2/.hg/strip-backup/73f6ee326b27-7612e004-backup.hg
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> strip tip exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> blackbox -l 4

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 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> update (no-chg !)
  1970-01-01 00:00:00.000 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> pythonhook-preupdate: hgext.eol.preupdate finished in * seconds (glob)
  1970-01-01 00:00:00.000 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> exthook-update: echo hooked finished in * seconds (glob)
  1970-01-01 00:00:00.000 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> update exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @d02f48003e62c24e2659d97d30f2a83abe5d5d51 (5000)> serve --no-profile --cmdserver chgunix --address $TESTTMP.chgsock/server.* --daemon-postexec 'chdir:/' (glob) (chg !)
  1970-01-01 00:00:00.000 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 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> init blackboxtest3 exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 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 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> updating the branch cache
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> updated branch cache (served) in * seconds (glob)
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> wrote branch cache (served) with 1 labels and 1 nodes
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug commit -m commit2 -d 2000-01-02 foo exited 0 after *.?? seconds (glob)
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r 0
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> writing .hg/cache/tags2-visible with 0 tags
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r 0 exited 0 after *.?? seconds (glob)
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r tip
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> --debug log -r tip exited 0 after *.?? seconds (glob)
  1970-01-01 00:00:00.000 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> blackbox

Skip rotation if the .hg is read-only

#if unix-permissions
  $ chmod -w .hg
  $ hg log -r. -T '{rev}\n' --config blackbox.maxsize=1 --debug
  warning: cannot rename '$TESTTMP/blackboxtest3/.hg/blackbox.log.1' to '$TESTTMP/blackboxtest3/.hg/blackbox.log': $EACCES$
  warning: cannot write to blackbox.log: $EACCES$
  1
  $ chmod +w .hg
#endif

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 | grep -E '\[command(finish)?\]'
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000) [commandfinish]> --config *blackbox.track=* --config *blackbox.logsource=True* init track_star exited 0 after * seconds (glob)
  1970-01-01 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000) [command]> blackbox
  $ cd $TESTTMP

#if chg

when using chg, blackbox.log should get rotated correctly

  $ cat > $TESTTMP/noop.py << EOF
  > import time
  > from mercurial import registrar, scmutil
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command(b'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 mercurial import registrar, scmutil
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command(b'raise')
  > def raisecmd(*args):
  >     raise RuntimeError('raise')
  > EOF


  $ hg init $TESTTMP/blackbox-exception-only --config blackbox.track=commandexception
  $ cat >> $TESTTMP/blackbox-exception-only/.hg/hgrc << EOF
  > [blackbox]
  > track = commandexception
  > [extensions]
  > raise=$TESTTMP/raise.py
  > EOF
  $ 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 00:00:00.000 bob @0000000000000000000000000000000000000000 (5000)> ** Unknown exception encountered with possibly-broken third-party extension "mock" (version N/A)
  $ tail -2 .hg/blackbox.log
  RuntimeError: raise
  
  $ cd ..

Check we did not broke `hg mv`
------------------------------
(we did in 6.4rc)

basic setup

  $ hg init blackbox-file-move
  $ cd blackbox-file-move
  $ echo foo > foo
  $ hg add foo
  $ hg commit -m 'foo'

copy a file

  $ hg copy foo bar

move a file

  $ hg mv foo goo