Mercurial > hg
view hgdemandimport/tracing.py @ 43027:041f042afcc5
copies: move file input processsing early
If we are to store the same kind of data outside of extra, we need to explicitly
prepare them before that.
On the long run, other storage (eg: sidedata) might use a different encoding to store this
information, since the constraint from extra does not apply to it.
Differential Revision: https://phab.mercurial-scm.org/D6937
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 25 Sep 2019 03:58:46 +0200 |
parents | 978c9a0c5974 |
children | 2372284d9457 |
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# 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