Mercurial > hg
view hgdemandimport/tracing.py @ 41568:641c8b66a825
largefiles: drop "rel" prefix from filename variables
The prefixes were meant to indicate that these paths are repo-relative
as opposed to absolute. However, that's what the majority of paths in
our code base are, so "rel" made me think they were instead
cwd-relative. Let's just drop the prefixes.
Differential Revision: https://phab.mercurial-scm.org/D5847
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Sun, 03 Feb 2019 22:49:28 -0800 |
parents | 452790284a15 |
children | d0b8a3cfd732 |
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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 @contextlib.contextmanager def log(whencefmt, *whenceargs): global _pipe, _session, _checked if _pipe is None: if _checked: yield return _checked = True if 'HGCATAPULTSERVERPIPE' not in os.environ: yield return _pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1) _session = os.environ.get('HGCATAPULTSESSION', 'none') 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