upstream/mercurial-mirror Files · hgext/narrow/narrowcopies.py

narrow: use diffmatcher to send only new filelogs in non-ellipses widening...

narrow: use diffmatcher to send only new filelogs in non-ellipses widening Before this patch, when we widen a non-ellipses narrow clone, we downloads all the filelogs matching the resulting new matcher. This is same as the ellipses case but can be improved because, we don't pull new csets in non-ellipses cases, we can only download the new added files instead of downloading all the files which matches the new matcher. So, we only download files which matches the new matcher but does not matches the old matcher. There exists a match.differencematcher() which is used here. This will lead to significant amount of speedup in extending a non-ellipses narrow copy on large repos because we will download and process only the new required filelogs. The tests changes demonstrate that we are downloading now less files. Thanks to Augie for pointing that functionality of differencematcher exists in core. Differential Revision: https://phab.mercurial-scm.org/D4614

Martin von Zweigbergk - - Load All Authors

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      # narrowcopies.py - extensions to mercurial copies module to support narrow

      # clones

      #

      # Copyright 2017 Google, Inc.

      #

      # 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

      from mercurial import (

          copies,

          extensions,

      )

      def setup(repo):

          def _computeforwardmissing(orig, a, b, match=None):

              missing = orig(a, b, match)

              narrowmatch = repo.narrowmatch()

              if narrowmatch.always():

                  return missing

              missing = [f for f in missing if narrowmatch(f)]

              return missing

          def _checkcopies(orig, srcctx, dstctx, f, base, tca, remotebase, limit,

                           data):

              narrowmatch = repo.narrowmatch()

              if not narrowmatch(f):

                  return

              orig(srcctx, dstctx, f, base, tca, remotebase, limit, data)

          extensions.wrapfunction(copies, '_computeforwardmissing',

                                  _computeforwardmissing)

          extensions.wrapfunction(copies, '_checkcopies', _checkcopies)

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				# narrowcopies.py - extensions to mercurial copies module to support narrow
				# clones
				#
				# Copyright 2017 Google, Inc.
				#
				# 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

				from mercurial import (
				copies,
				extensions,
				)

				def setup(repo):
				def _computeforwardmissing(orig, a, b, match=None):
				missing = orig(a, b, match)
				narrowmatch = repo.narrowmatch()
				if narrowmatch.always():
				return missing
				missing = [f for f in missing if narrowmatch(f)]
				return missing

				def _checkcopies(orig, srcctx, dstctx, f, base, tca, remotebase, limit,
				data):
				narrowmatch = repo.narrowmatch()
				if not narrowmatch(f):
				return
				orig(srcctx, dstctx, f, base, tca, remotebase, limit, data)

				extensions.wrapfunction(copies, '_computeforwardmissing',
				_computeforwardmissing)
				extensions.wrapfunction(copies, '_checkcopies', _checkcopies)