annotate contrib/lock-checker.py @ 18677:539210ed2069

blackbox: only show new heads on incoming

The blackbox was logging every head after every incoming group.
Now we only log the heads that have changed.

Added a test.  Moved the hooks test to the bottom of the file since
the hooks interfer with the tests after it.

"""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