tests/sitecustomize.py

remotefilelog: rework workaround for sshpeer deadlocks

The wrapping of `sshpeer.cleanup` silently broke when `cleanup` was
renamed to `_cleanup`, a couple of years ago.

I don't know what `orig.im_self` is, but regardless, the intention of
the wrapping seems pretty clear: close stderr before
sshpeer._cleanuppipes blocks on it. So do that.

Differential Revision: https://phab.mercurial-scm.org/D9997

from __future__ import absolute_import
import os

if os.environ.get('COVERAGE_PROCESS_START'):
    try:
        import coverage
        import uuid

        covpath = os.path.join(
            os.environ['COVERAGE_DIR'], 'cov.%s' % uuid.uuid1()
        )
        cov = coverage.coverage(data_file=covpath, auto_data=True)
        cov._warn_no_data = False
        cov._warn_unimported_source = False
        cov.start()
    except ImportError:
        pass