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

revlog: add method for obtaining storage info (API)...

revlog: add method for obtaining storage info (API) We currently have a handful of methods on the file and manifest storage interfaces for obtaining metadata about storage. e.g. files() is used to obtain the files backing storage. rawsize() is to quickly compute the size of tracked revisions without resolving their fulltext. Code in upgrade and stream clone make heavy use of these methods. The existing APIs are generic and don't necessarily have the specialization that we need going forward. For example, files() doesn't distinguish between exclusive storage and shared storage. This makes stream clone difficult to implement when e.g. there may be a single file backing storage for multiple tracked paths. It also makes reporting difficult, as we don't know how many bytes are actually used by storage since we can't easily identify shared files. This commit implements a new method for obtaining storage metadata. It is designed to accept arguments specifying what metadata to request and to return a dict with those fields populated. We /could/ make each of these attributes a separate method. But this is a specialized API and I'm trying to avoid method bloat on the interfaces. There is also the possibility that certain callers will want to obtain multiple fields in different combinations and some backends may have performance issues obtaining all that data via separate method calls. Simple storage integration tests have been added. For now, we assume fields can't be "None" (ignoring the interface documentation). We can revisit this later. Differential Revision: https://phab.mercurial-scm.org/D4747

Gregory Szorc - - Load All Authors

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      # narrowwirepeer.py - passes narrow spec with unbundle command

      #

      # 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 (

          extensions,

          hg,

          wireprotov1server,

      )

      NARROWCAP = 'exp-narrow-1'

      ELLIPSESCAP = 'exp-ellipses-1'

      def uisetup():

          extensions.wrapfunction(wireprotov1server, '_capabilities', addnarrowcap)

      def addnarrowcap(orig, repo, proto):

          """add the narrow capability to the server"""

          caps = orig(repo, proto)

          caps.append(NARROWCAP)

          if repo.ui.configbool('experimental', 'narrowservebrokenellipses'):

              caps.append(ELLIPSESCAP)

          return caps

      def reposetup(repo):

          def wirereposetup(ui, peer):

              def wrapped(orig, cmd, *args, **kwargs):

                  if cmd == 'unbundle':

                      # TODO: don't blindly add include/exclude wireproto

                      # arguments to unbundle.

                      include, exclude = repo.narrowpats

                      kwargs[r"includepats"] = ','.join(include)

                      kwargs[r"excludepats"] = ','.join(exclude)

                  return orig(cmd, *args, **kwargs)

              extensions.wrapfunction(peer, '_calltwowaystream', wrapped)

          hg.wirepeersetupfuncs.append(wirereposetup)

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				# narrowwirepeer.py - passes narrow spec with unbundle command
				#
				# 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 (
				extensions,
				hg,
				wireprotov1server,
				)

				NARROWCAP = 'exp-narrow-1'
				ELLIPSESCAP = 'exp-ellipses-1'

				def uisetup():
				extensions.wrapfunction(wireprotov1server, '_capabilities', addnarrowcap)

				def addnarrowcap(orig, repo, proto):
				"""add the narrow capability to the server"""
				caps = orig(repo, proto)
				caps.append(NARROWCAP)
				if repo.ui.configbool('experimental', 'narrowservebrokenellipses'):
				caps.append(ELLIPSESCAP)
				return caps

				def reposetup(repo):
				def wirereposetup(ui, peer):
				def wrapped(orig, cmd, args, *kwargs):
				if cmd == 'unbundle':
				# TODO: don't blindly add include/exclude wireproto
				# arguments to unbundle.
				include, exclude = repo.narrowpats
				kwargs[r"includepats"] = ','.join(include)
				kwargs[r"excludepats"] = ','.join(exclude)
				return orig(cmd, args, *kwargs)
				extensions.wrapfunction(peer, '_calltwowaystream', wrapped)
				hg.wirepeersetupfuncs.append(wirereposetup)