upstream/mercurial-mirror Files · hgext/hooklib/reject_merge_commits.py

absorb: preserve changesets which were already empty...

absorb: preserve changesets which were already empty Most commands in Mercurial (commit, rebase, absorb itself) don’t create empty changesets or drop them if they become empty. If there’s a changeset that’s empty, it must be a deliberate choice of the user. At least it shouldn’t be absorb’s responsibility to prune them. The fact that changesets that became empty during absorb are pruned, is unaffected by this. This case was found while writing patches which make it possible to configure absorb and rebase to not drop empty changesets. Even without having such config set, I think it’s valuable to preserve changesets which were already empty.

Joerg Sonnenberger - - Load All Authors

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      # Copyright 2020 Joerg Sonnenberger <joerg@bec.de>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      """reject_merge_commits is a hook to check new changesets for merge commits.

      Merge commits are allowed only between different branches, i.e. merging

      a feature branch into the main development branch. This can be used to

      enforce policies for linear commit histories.

      Usage:

        [hooks]

        pretxnchangegroup.reject_merge_commits = \

          python:hgext.hooklib.reject_merge_commits.hook

      """

      from __future__ import absolute_import

      from mercurial.i18n import _

      from mercurial import (

          error,

          pycompat,

      )

      def hook(ui, repo, hooktype, node=None, **kwargs):

          if hooktype != b"pretxnchangegroup":

              raise error.Abort(

                  _(b'Unsupported hook type %r') % pycompat.bytestr(hooktype)

              )

          ctx = repo.unfiltered()[node]

          for rev in repo.changelog.revs(start=ctx.rev()):

              rev = repo[rev]

              parents = rev.parents()

              if len(parents) < 2:

                  continue

              if all(repo[p].branch() == rev.branch() for p in parents):

                  raise error.Abort(

                      _(

                          b'%s rejected as merge on the same branch. '

                          b'Please consider rebase.'

                      )

                      % rev

                  )

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				# Copyright 2020 Joerg Sonnenberger <joerg@bec.de>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				"""reject_merge_commits is a hook to check new changesets for merge commits.
				Merge commits are allowed only between different branches, i.e. merging
				a feature branch into the main development branch. This can be used to
				enforce policies for linear commit histories.

				Usage:
				[hooks]
				pretxnchangegroup.reject_merge_commits = \
				python:hgext.hooklib.reject_merge_commits.hook
				"""

				from __future__ import absolute_import

				from mercurial.i18n import _
				from mercurial import (
				error,
				pycompat,
				)


				def hook(ui, repo, hooktype, node=None, **kwargs):
				if hooktype != b"pretxnchangegroup":
				raise error.Abort(
				_(b'Unsupported hook type %r') % pycompat.bytestr(hooktype)
				)

				ctx = repo.unfiltered()[node]
				for rev in repo.changelog.revs(start=ctx.rev()):
				rev = repo[rev]
				parents = rev.parents()
				if len(parents) < 2:
				continue
				if all(repo[p].branch() == rev.branch() for p in parents):
				raise error.Abort(
				_(
				b'%s rejected as merge on the same branch. '
				b'Please consider rebase.'
				)
				% rev
				)