upstream/mercurial-mirror Files · tests/testlib/ext-sidedata-2.py

cg4: introduce protocol flag to signify the presence of sidedata...

cg4: introduce protocol flag to signify the presence of sidedata We need a way of signaling whether the current revision has sidedata or not, and re-using the revision flags would waste potential revlog flags and mix two normally independent layers. In this change, we add a single byte at the start of the ch4 delta header to set potential protocol flags. We also reclaim the revlog flag for sidedata, since it is no longer used, in its place now lives the (also experimental) copytracing flag. When generating deltas, apply the `CG_FLAG_SIDEDATA` flag if there is sidedata. When applying the deltas, if said flag is present, the next chunk contains the sidedata. Differential Revision: https://phab.mercurial-scm.org/D10343

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      # coding: utf8

      # ext-sidedata-2.py - small extension to test (differently) the sidedata logic

      #

      # Simulates a client for a complex sidedata exchange.

      #

      # Copyright 2021 Raphaël Gomès <rgomes@octobus.net>

      #

      # 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 hashlib

      import struct

      from mercurial.revlogutils import sidedata as sidedatamod

      from mercurial.revlogutils import constants

      def compute_sidedata_1(repo, revlog, rev, sidedata, text=None):

          sidedata = sidedata.copy()

          if text is None:

              text = revlog.revision(rev)

          sidedata[sidedatamod.SD_TEST1] = struct.pack('>I', len(text))

          return sidedata

      def compute_sidedata_2(repo, revlog, rev, sidedata, text=None):

          sidedata = sidedata.copy()

          if text is None:

              text = revlog.revision(rev)

          sha256 = hashlib.sha256(text).digest()

          sidedata[sidedatamod.SD_TEST2] = struct.pack('>32s', sha256)

          return sidedata

      def reposetup(ui, repo):

          # Sidedata keys happen to be the same as the categories, easier for testing.

          for kind in constants.ALL_KINDS:

              repo.register_sidedata_computer(

                  kind,

                  sidedatamod.SD_TEST1,

                  (sidedatamod.SD_TEST1,),

                  compute_sidedata_1,

              )

              repo.register_sidedata_computer(

                  kind,

                  sidedatamod.SD_TEST2,

                  (sidedatamod.SD_TEST2,),

                  compute_sidedata_2,

              )

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				# coding: utf8
				# ext-sidedata-2.py - small extension to test (differently) the sidedata logic
				#
				# Simulates a client for a complex sidedata exchange.
				#
				# Copyright 2021 Raphaël Gomès <rgomes@octobus.net>
				#
				# 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 hashlib
				import struct

				from mercurial.revlogutils import sidedata as sidedatamod
				from mercurial.revlogutils import constants


				def compute_sidedata_1(repo, revlog, rev, sidedata, text=None):
				sidedata = sidedata.copy()
				if text is None:
				text = revlog.revision(rev)
				sidedata[sidedatamod.SD_TEST1] = struct.pack('>I', len(text))
				return sidedata


				def compute_sidedata_2(repo, revlog, rev, sidedata, text=None):
				sidedata = sidedata.copy()
				if text is None:
				text = revlog.revision(rev)
				sha256 = hashlib.sha256(text).digest()
				sidedata[sidedatamod.SD_TEST2] = struct.pack('>32s', sha256)
				return sidedata


				def reposetup(ui, repo):
				# Sidedata keys happen to be the same as the categories, easier for testing.
				for kind in constants.ALL_KINDS:
				repo.register_sidedata_computer(
				kind,
				sidedatamod.SD_TEST1,
				(sidedatamod.SD_TEST1,),
				compute_sidedata_1,
				)
				repo.register_sidedata_computer(
				kind,
				sidedatamod.SD_TEST2,
				(sidedatamod.SD_TEST2,),
				compute_sidedata_2,
				)