upstream/mercurial-mirror Files · mercurial/rewriteutil.py

changegroup: allow to force delta to be against p1...

changegroup: allow to force delta to be against p1 This new developer option is useful to general more "generic" bundle. Without this option, a bundle generated from the repository use deltas similar to the one stored in the specific repository it was generated from. This makes performance testing a bit tricky. Using deltas similar to the final result means all delta stored in the bundle can be applied to the target repository without any further processing (except for the rare case of a full snapshot). The application of such bundles (almost) never exercises the (slower) path of searching for a new valid delta. This result in unrealistic and too favorable timing and profile. Instead, we introduce an option to make sure all revisions are stored as a delta against p1. It might not be the best generation option, but it guarantees that the content will be "generic", not favoring a specific target.

Pulkit Goyal - - Load All Authors

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      # rewriteutil.py - utility functions for rewriting changesets

      #

      # Copyright 2017 Octobus <contact@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

      from .i18n import _

      from . import (

          error,

          node,

          obsolete,

          revset,

      )

      def precheck(repo, revs, action='rewrite'):

          """check if revs can be rewritten

          action is used to control the error message.

          Make sure this function is called after taking the lock.

          """

          if node.nullrev in revs:

              msg = _("cannot %s null changeset") % (action)

              hint = _("no changeset checked out")

              raise error.Abort(msg, hint=hint)

          publicrevs = repo.revs('%ld and public()', revs)

          if len(repo[None].parents()) > 1:

              raise error.Abort(_("cannot %s while merging") % action)

          if publicrevs:

              msg = _("cannot %s public changesets") % (action)

              hint = _("see 'hg help phases' for details")

              raise error.Abort(msg, hint=hint)

          newunstable = disallowednewunstable(repo, revs)

          if newunstable:

              raise error.Abort(_("cannot %s changeset with children") % action)

      def disallowednewunstable(repo, revs):

          """Checks whether editing the revs will create new unstable changesets and

          are we allowed to create them.

          To allow new unstable changesets, set the config:

              `experimental.evolution.allowunstable=True`

          """

          allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)

          if allowunstable:

              return revset.baseset()

          return repo.revs("(%ld::) - %ld", revs, revs)

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				# rewriteutil.py - utility functions for rewriting changesets
				#
				# Copyright 2017 Octobus <contact@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

				from .i18n import _

				from . import (
				error,
				node,
				obsolete,
				revset,
				)

				def precheck(repo, revs, action='rewrite'):
				"""check if revs can be rewritten
				action is used to control the error message.

				Make sure this function is called after taking the lock.
				"""
				if node.nullrev in revs:
				msg = _("cannot %s null changeset") % (action)
				hint = _("no changeset checked out")
				raise error.Abort(msg, hint=hint)

				publicrevs = repo.revs('%ld and public()', revs)
				if len(repo[None].parents()) > 1:
				raise error.Abort(_("cannot %s while merging") % action)

				if publicrevs:
				msg = _("cannot %s public changesets") % (action)
				hint = _("see 'hg help phases' for details")
				raise error.Abort(msg, hint=hint)

				newunstable = disallowednewunstable(repo, revs)
				if newunstable:
				raise error.Abort(_("cannot %s changeset with children") % action)

				def disallowednewunstable(repo, revs):
				"""Checks whether editing the revs will create new unstable changesets and
				are we allowed to create them.

				To allow new unstable changesets, set the config:
				`experimental.evolution.allowunstable=True`
				"""
				allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
				if allowunstable:
				return revset.baseset()
				return repo.revs("(%ld::) - %ld", revs, revs)