upstream/mercurial-mirror Files · hgdemandimport/tracing.py

tracing: new module to make tracing events in hg easier...

tracing: new module to make tracing events in hg easier This lives in hgdemandimport because I want to instrument a bunch of low-level stuff including the bare `hg` script and demandimport, so it can't live at a higher layer. Differential Revision: https://phab.mercurial-scm.org/D4344

Augie Fackler - - Load All Authors

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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:

              _pipe.write('START %s %s\n' % (_session, whence))

              yield

          finally:

              _pipe.write('END %s %s\n' % (_session, whence))

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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:
				_pipe.write('START %s %s\n' % (_session, whence))
				yield
				finally:
				_pipe.write('END %s %s\n' % (_session, whence))