blackbox: disable extremely verbose logging (issue6110)

This is maybe not the best way to go about fixing this, but anything
is better than the status quo.

Differential Revision: https://phab.mercurial-scm.org/D6611

hgext/blackbox.py

@@ -1,197 +1,205 b''
 # blackbox.py - log repository events to a file for post-mortem debugging
 #
 # Copyright 2010 Nicolas Dumazet
 # Copyright 2013 Facebook, Inc.
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 """log repository events to a blackbox for debugging
 
 Logs event information to .hg/blackbox.log to help debug and diagnose problems.
-The events that get logged can be configured via the blackbox.track config key.
+The events that get logged can be configured via the blackbox.track and
+blackbox.ignore config keys.
 
 Examples::
 
   [blackbox]
   track = *
+  ignore = pythonhook
   # dirty is *EXPENSIVE* (slow);
   # each log entry indicates `+` if the repository is dirty, like :hg:`id`.
   dirty = True
   # record the source of log messages
   logsource = True
 
   [blackbox]
   track = command, commandfinish, commandexception, exthook, pythonhook
 
   [blackbox]
   track = incoming
 
   [blackbox]
   # limit the size of a log file
   maxsize = 1.5 MB
   # rotate up to N log files when the current one gets too big
   maxfiles = 3
 
   [blackbox]
   # Include nanoseconds in log entries with %f (see Python function
   # datetime.datetime.strftime)
   date-format = '%Y-%m-%d @ %H:%M:%S.%f'
 
 """
 
 from __future__ import absolute_import
 
 import re
 
 from mercurial.i18n import _
 from mercurial.node import hex
 
 from mercurial import (
     encoding,
     loggingutil,
     registrar,
 )
 from mercurial.utils import (
     dateutil,
     procutil,
 )
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = 'ships-with-hg-core'
 
 cmdtable = {}
 command = registrar.command(cmdtable)
 
 configtable = {}
 configitem = registrar.configitem(configtable)
 
 configitem('blackbox', 'dirty',
     default=False,
 )
 configitem('blackbox', 'maxsize',
     default='1 MB',
 )
 configitem('blackbox', 'logsource',
     default=False,
 )
 configitem('blackbox', 'maxfiles',
     default=7,
 )
 configitem('blackbox', 'track',
     default=lambda: ['*'],
 )
+configitem('blackbox', 'ignore',
+    default=lambda: ['chgserver', 'cmdserver', 'extension'],
+)
 configitem('blackbox', 'date-format',
     default='%Y/%m/%d %H:%M:%S',
 )
 
 _lastlogger = loggingutil.proxylogger()
 
 class blackboxlogger(object):
     def __init__(self, ui, repo):
         self._repo = repo
         self._trackedevents = set(ui.configlist('blackbox', 'track'))
+        self._ignoredevents = set(ui.configlist('blackbox', 'ignore'))
         self._maxfiles = ui.configint('blackbox', 'maxfiles')
         self._maxsize = ui.configbytes('blackbox', 'maxsize')
         self._inlog = False
 
     def tracked(self, event):
-        return b'*' in self._trackedevents or event in self._trackedevents
+        return ((b'*' in self._trackedevents
+                 and event not in self._ignoredevents)
+                or event in self._trackedevents)
 
     def log(self, ui, event, msg, opts):
         # self._log() -> ctx.dirty() may create new subrepo instance, which
         # ui is derived from baseui. So the recursion guard in ui.log()
         # doesn't work as it's local to the ui instance.
         if self._inlog:
             return
         self._inlog = True
         try:
             self._log(ui, event, msg, opts)
         finally:
             self._inlog = False
 
     def _log(self, ui, event, msg, opts):
         default = ui.configdate('devel', 'default-date')
         date = dateutil.datestr(default, ui.config('blackbox', 'date-format'))
         user = procutil.getuser()
         pid = '%d' % procutil.getpid()
         changed = ''
         ctx = self._repo[None]
         parents = ctx.parents()
         rev = ('+'.join([hex(p.node()) for p in parents]))
         if (ui.configbool('blackbox', 'dirty') and
             ctx.dirty(missing=True, merge=False, branch=False)):
             changed = '+'
         if ui.configbool('blackbox', 'logsource'):
             src = ' [%s]' % event
         else:
             src = ''
         try:
             fmt = '%s %s @%s%s (%s)%s> %s'
             args = (date, user, rev, changed, pid, src, msg)
             with loggingutil.openlogfile(
                     ui, self._repo.vfs, name='blackbox.log',
                     maxfiles=self._maxfiles, maxsize=self._maxsize) as fp:
                 fp.write(fmt % args)
         except (IOError, OSError) as err:
             # deactivate this to avoid failed logging again
             self._trackedevents.clear()
             ui.debug('warning: cannot write to blackbox.log: %s\n' %
                      encoding.strtolocal(err.strerror))
             return
         _lastlogger.logger = self
 
 def uipopulate(ui):
     ui.setlogger(b'blackbox', _lastlogger)
 
 def reposetup(ui, repo):
     # During 'hg pull' a httppeer repo is created to represent the remote repo.
     # It doesn't have a .hg directory to put a blackbox in, so we don't do
     # the blackbox setup for it.
     if not repo.local():
         return
 
     # Since blackbox.log is stored in the repo directory, the logger should be
     # instantiated per repository.
     logger = blackboxlogger(ui, repo)
     ui.setlogger(b'blackbox', logger)
 
     # Set _lastlogger even if ui.log is not called. This gives blackbox a
     # fallback place to log
     if _lastlogger.logger is None:
         _lastlogger.logger = logger
 
     repo._wlockfreeprefix.add('blackbox.log')
 
 @command('blackbox',
     [('l', 'limit', 10, _('the number of events to show')),
     ],
     _('hg blackbox [OPTION]...'),
     helpcategory=command.CATEGORY_MAINTENANCE,
     helpbasic=True)
 def blackbox(ui, repo, *revs, **opts):
     '''view the recent repository events
     '''
 
     if not repo.vfs.exists('blackbox.log'):
         return
 
     limit = opts.get(r'limit')
     fp = repo.vfs('blackbox.log', 'r')
     lines = fp.read().split('\n')
 
     count = 0
     output = []
     for line in reversed(lines):
         if count >= limit:
             break
 
         # count the commands by matching lines like: 2013/01/23 19:13:36 root>
         if re.match(br'^\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2} .*> .*', line):
             count += 1
         output.append(line)
 
     ui.status('\n'.join(reversed(output)))

tests/test-blackbox.t

@@ -1,484 +1,481 b''
 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
-  > [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 abortcmd 2> /dev/null
   [255]
   $ hg blackbox -l 2
   1970/01/01 00:00:00 bob @0000000000000000000000000000000000000000 (5000)> abortcmd 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 branch cache (served) in * seconds (glob)
   1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> wrote branch cache (served) 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 branch cache (base) in * seconds (glob)
   1970/01/01 00:00:00 bob @6563da9dcf87b1949716e38ff3e3dfaa3198eb06 (5000)> wrote branch cache (base) 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 branch cache (served) in * seconds (glob)
   1970/01/01 00:00:00 bob @45589e459b2edfbf3dbde7e01f611d2c1e7453d7 (5000)> wrote branch cache (served) 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