Mercurial > hg
view tests/test-devel-warnings.t @ 25881:9de443515f1d stable
help: scripting help topic
There are a lot of non-human consumers of Mercurial. And the challenges
and considerations for machines consuming Mercurial is significantly
different from what humans face.
I think there are enough special considerations around how machines
consume Mercurial that a dedicated help topic is warranted. I concede
the audience for this topic is probably small compared to the general
audience. However, lots of normal Mercurial users do things like create
one-off shell scripts for common workflows that I think this is useful
enough to be in the install (as opposed to, say, a wiki page - which
most users will likely never find).
This text is by no means perfect. But you have to start somewhere. I
think I did cover the important parts, though.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 18 Jul 2015 17:10:28 -0700 |
parents | c88082baf693 |
children | ba5f20450b10 |
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$ cat << EOF > buggylocking.py > """A small extension that acquire locks in the wrong order > """ > > from mercurial import cmdutil, repair, revset > > cmdtable = {} > command = cmdutil.command(cmdtable) > > @command('buggylocking', [], '') > def buggylocking(ui, repo): > tr = repo.transaction('buggy') > lo = repo.lock() > wl = repo.wlock() > wl.release() > lo.release() > > @command('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('nowaitlocking', [], '') > def nowaitlocking(ui, repo): > lo = repo.lock() > wl = repo.wlock(wait=False) > wl.release() > lo.release() > > @command('stripintr', [], '') > def stripintr(ui, repo): > lo = repo.lock() > tr = repo.transaction('foobar') > try: > repair.strip(repo.ui, repo, [repo['.'].node()]) > finally: > lo.release() > > def oldstylerevset(repo, subset, x): > return list(subset) > > revset.symbols['oldstyle'] = oldstylerevset > EOF $ cat << EOF >> $HGRCPATH > [extensions] > buggylocking=$TESTTMP/buggylocking.py > [devel] > all-warnings=1 > EOF $ hg init lock-checker $ cd lock-checker $ hg buggylocking devel-warn: transaction with no lock at: $TESTTMP/buggylocking.py:11 (buggylocking) devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:13 (buggylocking) $ cat << EOF >> $HGRCPATH > [devel] > all=0 > check-locks=1 > EOF $ hg buggylocking devel-warn: transaction with no lock at: $TESTTMP/buggylocking.py:11 (buggylocking) devel-warn: "wlock" acquired after "lock" at: $TESTTMP/buggylocking.py:13 (buggylocking) $ hg buggylocking --traceback devel-warn: transaction with no 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 _dispatch (glob) */mercurial/dispatch.py:* in runcommand (glob) */mercurial/dispatch.py:* in _runcommand (glob) */mercurial/dispatch.py:* in checkargs (glob) */mercurial/dispatch.py:* in <lambda> (glob) */mercurial/util.py:* in check (glob) $TESTTMP/buggylocking.py:* in buggylocking (glob) 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 _dispatch (glob) */mercurial/dispatch.py:* in runcommand (glob) */mercurial/dispatch.py:* in _runcommand (glob) */mercurial/dispatch.py:* in checkargs (glob) */mercurial/dispatch.py:* in <lambda> (glob) */mercurial/util.py:* in check (glob) $TESTTMP/buggylocking.py:* in buggylocking (glob) $ hg properlocking $ hg nowaitlocking $ echo a > a $ hg add a $ hg commit -m a $ hg stripintr saved backup bundle to $TESTTMP/lock-checker/.hg/strip-backup/cb9a9f314b8b-cc5ccb0b-backup.hg (glob) abort: programming error: cannot strip from inside a transaction (contact your extension maintainer) [255] $ hg log -r "oldstyle()" -T '{rev}\n' devel-warn: revset "oldstyle" use list instead of smartset, (upgrade your code) at: */mercurial/revset.py:* (mfunc) (glob) 0 $ cd ..