hgdemandimport/tracing.py
author Martin von Zweigbergk <martinvonz@google.com>
Mon, 11 Feb 2019 09:12:23 -0800
changeset 41695 a8d3a4be066e
parent 39424 452790284a15
child 42492 d0b8a3cfd732
permissions -rw-r--r--
windows: use util.localpath for repo-relative paths in getuipathfn() Now that we have a single place that translates from internal path representation (slash-separated) to UI representation (i.e. scmutil.getuipathfn()), let's switch that over to using util.localpath for absolute paths. I don't expect any test impact on Windows because we still respect ui.slash, which is set by the test runner. As Yuya pointed out, a997163e7fae (status: extract helper for producing relative or absolute path for UI, 2019-01-29) accidentally changed to slash-separated paths on Windows because it used used to use repo.pathto(f, cwd='') (which calls util.localpath()) and after that patch it just prints the filename without any transformation. This patch should fix that regression. Differential Revision: https://phab.mercurial-scm.org/D5935

# 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