Mercurial > hg
view hgdemandimport/tracing.py @ 46393:66e8e279133b
hghave: list the module needed for the `vcr` check
I'm tired of having to look up modules each time I setup a system, and try to
distinguish between similar package names to get the right one. Now that the
search API has been disabled, it's even harder. There are other python packages
here that should be listed like this, but this is the one that came up missing
today, so it's a start.
Differential Revision: https://phab.mercurial-scm.org/D9879
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Tue, 26 Jan 2021 17:25:30 -0500 |
parents | 2372284d9457 |
children | 6000f5b25c9b |
line wrap: on
line source
# Support code for event tracing in Mercurial. Lives in demandimport # so it can also be used in demandimport. # # Copyright 2018 Google LLC. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import contextlib import os _pipe = None _checked = False _session = 'none' def _isactive(): global _pipe, _session, _checked if _pipe is None: if _checked: return False _checked = True if 'HGCATAPULTSERVERPIPE' not in os.environ: return False _pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1) _session = os.environ.get('HGCATAPULTSESSION', 'none') return True @contextlib.contextmanager def log(whencefmt, *whenceargs): if not _isactive(): yield return whence = whencefmt % whenceargs try: # Both writes to the pipe are wrapped in try/except to ignore # errors, as we can see mysterious errors in here if the pager # is active. Presumably other conditions could trigger # problems too. try: _pipe.write('START %s %s\n' % (_session, whence)) except IOError: pass yield finally: try: _pipe.write('END %s %s\n' % (_session, whence)) except IOError: pass def counter(label, amount, *labelargs): if not _isactive(): return l = label % labelargs # See above in log() for why this is in a try/except. try: _pipe.write('COUNTER %s %d %s\n' % (_session, amount, l)) except IOError: pass