$ cat << EOF > buggylocking.py

  > """A small extension that tests our developer warnings

  > """

  > 

  > from mercurial import error, registrar, repair, util

  > 

  > cmdtable = {}

  > command = registrar.command(cmdtable)

  > 

  > @command(b'buggylocking', [], '')

  > def buggylocking(ui, repo):

  >     lo = repo.lock()

  >     wl = repo.wlock()

  >     wl.release()

  >     lo.release()

  > 

  > @command(b'buggytransaction', [], '')

  > def buggylocking(ui, repo):

  >     tr = repo.transaction('buggy')

  >     # make sure we rollback the transaction as we don't want to rely on the__del__

  >     tr.release()

  > 

  > @command(b'properlocking', [], '')

  > def properlocking(ui, repo):

  >     """check that reentrance is fine"""

  >     wl = repo.wlock()

  >     lo = repo.lock()

  >     tr = repo.transaction('proper')

  >     tr2 = repo.transaction('proper')

  >     lo2 = repo.lock()

  >     wl2 = repo.wlock()

  >     wl2.release()

  >     lo2.release()

  >     tr2.close()

  >     tr.close()

  >     lo.release()

  >     wl.release()

  > 

  > @command(b'nowaitlocking', [], '')

  > def nowaitlocking(ui, repo):

  >     lo = repo.lock()

  >     wl = repo.wlock(wait=False)

  >     wl.release()

  >     lo.release()

  > 

  > @command(b'stripintr', [], '')

  > def stripintr(ui, repo):

  >     lo = repo.lock()

  >     tr = repo.transaction('foobar')

  >     try:

  >         repair.strip(repo.ui, repo, [repo['.'].node()])

  >     finally:

  >         lo.release()

  > @command(b'oldanddeprecated', [], '')

  > def oldanddeprecated(ui, repo):

  >     """test deprecation warning API"""

  >     def foobar(ui):

  >         ui.deprecwarn('foorbar is deprecated, go shopping', '42.1337')

  >     foobar(ui)

  > @command(b'nouiwarning', [], '')

  > def nouiwarning(ui, repo):

  >     util.nouideprecwarn('this is a test', '13.37')

  > @command(b'programmingerror', [], '')

  > def programmingerror(ui, repo):

  >     raise error.ProgrammingError('something went wrong', hint='try again')

  > EOF

  $ cat << EOF >> $HGRCPATH

  > [extensions]

  > buggylocking=$TESTTMP/buggylocking.py

  > mock=$TESTDIR/mockblackbox.py

  > blackbox=

  > [devel]

  > all-warnings=1

  > EOF

  $ hg init lock-checker

  $ cd lock-checker

  $ hg buggylocking

  devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:* (buggylocking) (glob)

  $ cat << EOF >> $HGRCPATH

  > [devel]

  > all=0

  > check-locks=1

  > EOF

  $ hg buggylocking

  devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:* (buggylocking) (glob)

  $ hg buggylocking --traceback

  devel-warn: "wlock" acquired after "lock" at:

   */hg:* in * (glob)

   */mercurial/dispatch.py:* in run (glob)

   */mercurial/dispatch.py:* in dispatch (glob)

   */mercurial/dispatch.py:* in _runcatch (glob)

   */mercurial/dispatch.py:* in _callcatch (glob)

   */mercurial/scmutil.py* in callcatch (glob)

   */mercurial/dispatch.py:* in _runcatchfunc (glob)

   */mercurial/dispatch.py:* in _dispatch (glob)

   */mercurial/dispatch.py:* in runcommand (glob)

   */mercurial/dispatch.py:* in _runcommand (glob)

   */mercurial/dispatch.py:* in <lambda> (glob)

   */mercurial/util.py:* in check (glob)

   $TESTTMP/buggylocking.py:* in buggylocking (glob)

  $ hg properlocking

  $ hg nowaitlocking

Stripping from a transaction

  $ echo a > a

  $ hg add a

  $ hg commit -m a

  $ hg stripintr 2>&1 | egrep -v '^(\*\*|  )'

  Traceback (most recent call last):

  mercurial.error.ProgrammingError: cannot strip from inside a transaction

  $ hg oldanddeprecated

  devel-warn: foorbar is deprecated, go shopping

  (compatibility will be dropped after Mercurial-42.1337, update your code.) at: $TESTTMP/buggylocking.py:* (oldanddeprecated) (glob)

  $ hg oldanddeprecated --traceback

  devel-warn: foorbar is deprecated, go shopping

  (compatibility will be dropped after Mercurial-42.1337, update your code.) at:

   */hg:* in <module> (glob)

   */mercurial/dispatch.py:* in run (glob)

   */mercurial/dispatch.py:* in dispatch (glob)

   */mercurial/dispatch.py:* in _runcatch (glob)

   */mercurial/dispatch.py:* in _callcatch (glob)

   */mercurial/scmutil.py* in callcatch (glob)

   */mercurial/dispatch.py:* in _runcatchfunc (glob)

   */mercurial/dispatch.py:* in _dispatch (glob)

   */mercurial/dispatch.py:* in runcommand (glob)

   */mercurial/dispatch.py:* in _runcommand (glob)

   */mercurial/dispatch.py:* in <lambda> (glob)

   */mercurial/util.py:* in check (glob)

   $TESTTMP/buggylocking.py:* in oldanddeprecated (glob)

  $ hg blackbox -l 7

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> oldanddeprecated

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> devel-warn: foorbar is deprecated, go shopping

  (compatibility will be dropped after Mercurial-42.1337, update your code.) at: $TESTTMP/buggylocking.py:* (oldanddeprecated) (glob)

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> oldanddeprecated exited 0 after * seconds (glob)

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> oldanddeprecated --traceback

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> devel-warn: foorbar is deprecated, go shopping

  (compatibility will be dropped after Mercurial-42.1337, update your code.) at:

   */hg:* in <module> (glob)

   */mercurial/dispatch.py:* in run (glob)

   */mercurial/dispatch.py:* in dispatch (glob)

   */mercurial/dispatch.py:* in _runcatch (glob)

   */mercurial/dispatch.py:* in _callcatch (glob)

   */mercurial/scmutil.py* in callcatch (glob)

   */mercurial/dispatch.py:* in _runcatchfunc (glob)

   */mercurial/dispatch.py:* in _dispatch (glob)

   */mercurial/dispatch.py:* in runcommand (glob)

   */mercurial/dispatch.py:* in _runcommand (glob)

   */mercurial/dispatch.py:* in <lambda> (glob)

   */mercurial/util.py:* in check (glob)

   $TESTTMP/buggylocking.py:* in oldanddeprecated (glob)

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> oldanddeprecated --traceback exited 0 after * seconds (glob)

  1970/01/01 00:00:00 bob @cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b (5000)> blackbox -l 7

Test programming error failure:

  $ hg buggytransaction 2>&1 | egrep -v '^  '

  ** Unknown exception encountered with possibly-broken third-party extension buggylocking

  ** which supports versions unknown of Mercurial.

  ** Please disable buggylocking and try your action again.

  ** If that fixes the bug please report it to the extension author.

  ** Python * (glob)

  ** Mercurial Distributed SCM (*) (glob)

  ** Extensions loaded: * (glob)

  ** ProgrammingError: transaction requires locking

  Traceback (most recent call last):

  mercurial.error.ProgrammingError: transaction requires locking

  $ hg programmingerror 2>&1 | egrep -v '^  '

  ** Unknown exception encountered with possibly-broken third-party extension buggylocking

  ** which supports versions unknown of Mercurial.

  ** Please disable buggylocking and try your action again.

  ** If that fixes the bug please report it to the extension author.

  ** Python * (glob)

  ** Mercurial Distributed SCM (*) (glob)

  ** Extensions loaded: * (glob)

  ** ProgrammingError: something went wrong

  ** (try again)

  Traceback (most recent call last):

  mercurial.error.ProgrammingError: something went wrong

Old style deprecation warning

  $ hg nouiwarning

  $TESTTMP/buggylocking.py:*: DeprecationWarning: this is a test (glob)

  (compatibility will be dropped after Mercurial-13.37, update your code.)

    util.nouideprecwarn('this is a test', '13.37')

(disabled outside of test run)

  $ HGEMITWARNINGS= hg nouiwarning

Test warning on config option access and registration

  $ cat << EOF > ${TESTTMP}/buggyconfig.py

  > """A small extension that tests our developer warnings for config"""

  > 

  > from mercurial import registrar

  > 

  > cmdtable = {}

  > command = registrar.command(cmdtable)

  > 

  > configtable = {}

  > configitem = registrar.configitem(configtable)

  > 

  > configitem('test', 'some', default='foo')

  > # overwrite a core config

  > configitem('ui', 'quiet', default=False)

  > configitem('ui', 'interactive', default=None)

  > 

  > @command(b'buggyconfig')

  > def cmdbuggyconfig(ui, repo):

  >     repo.ui.config('ui', 'quiet', False)

  >     repo.ui.config('ui', 'interactive', None)

  >     repo.ui.config('test', 'some', 'foo')

  > EOF

  $ hg --config "extensions.buggyconfig=${TESTTMP}/buggyconfig.py" buggyconfig

  devel-warn: extension 'buggyconfig' overwrite config item 'ui.interactive' at: */mercurial/extensions.py:* (loadall) (glob)

  devel-warn: extension 'buggyconfig' overwrite config item 'ui.quiet' at: */mercurial/extensions.py:* (loadall) (glob)

  devel-warn: specifying a default value for a registered config item: 'ui.quiet' 'False' at: $TESTTMP/buggyconfig.py:* (cmdbuggyconfig) (glob)

  devel-warn: specifying a default value for a registered config item: 'ui.interactive' 'None' at: $TESTTMP/buggyconfig.py:* (cmdbuggyconfig) (glob)

  devel-warn: specifying a default value for a registered config item: 'test.some' 'foo' at: $TESTTMP/buggyconfig.py:* (cmdbuggyconfig) (glob)

  $ cd ..