contrib/lock-checker.py

i18n: make column positioning message of MQ summary output translatable

Before this patch, one of column positioning messages of MQ summary
output is not translatable, and patches are always listed up at fixed
column position like below, when patch queue is not empty:

    mq:     1 applied, 1 unapplied

But column positioning messages for other summarized information are
translatable, so other information may be displayed at different
column position on non-English locale environments.

This patch makes column positioning message of MQ summary output
translatable.

"""Extension to verify locks are obtained in the required places.

This works by wrapping functions that should be surrounded by a lock
and asserting the lock is held. Missing locks are called out with a
traceback printed to stderr.

This currently only checks store locks, not working copy locks.
"""
import os
import traceback

def _warnstack(ui, msg, skip=1):
    '''issue warning with the message and the current stack, skipping the
    skip last entries'''
    ui.warn('%s at:\n' % msg)
    entries = traceback.extract_stack()[:-skip]
    fnmax = max(len(entry[0]) for entry in entries)
    for fn, ln, func, _text in entries:
        ui.warn(' %*s:%-4s in %s\n' % (fnmax, fn, ln, func))

def _checklock(repo):
    l = repo._lockref and repo._lockref()
    if l is None or not l.held:
        _warnstack(repo.ui, 'missing lock', skip=2)

def reposetup(ui, repo):
    orig = repo.__class__
    class lockcheckrepo(repo.__class__):
        def _writejournal(self, *args, **kwargs):
            _checklock(self)
            return orig._writejournal(self, *args, **kwargs)

        def transaction(self, *args, **kwargs):
            _checklock(self)
            return orig.transaction(self, *args, **kwargs)

        # TODO(durin42): kiilerix had a commented-out lock check in
        # _writebranchcache and _writerequirements

        def _tag(self, *args, **kwargs):
            _checklock(self)
            return orig._tag(self, *args, **kwargs)

        def write(self, *args, **kwargs):
            assert os.path.lexists(self._join('.hg/wlock'))
            return orig.write(self, *args, **kwargs)

    repo.__class__ = lockcheckrepo