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

git: skeleton of a new extension to _directly_ operate on git repos...

git: skeleton of a new extension to _directly_ operate on git repos This is based in part of work I did years ago in hgit, but it's mostly new code since I'm using pygit2 instead of dulwich and the hg storage interfaces have improved. Some cleanup of old hgit code by Pulkit, which I greatly appreciate. test-git-interop.t does not cover a whole lot of cases, but it passes. It includes status, diff, making a new commit, and `hg annotate` working on the git repository. This is _not_ (yet) production quality code: this is an experiment. Known technical debt lurking in this implementation: * Writing bookmarks just totally ignores transactions. * The way progress is threaded down into the gitstore is awful. * Ideally we'd find a way to incrementally reindex DAGs. I'm not sure how to do that efficiently, so we might need a "known only fast-forwards" mode on the DAG indexer for use on `hg commit` and friends. * We don't even _try_ to do anything reasonable for `hg pull` or `hg push`. * Mercurial need an interface for the changelog type. Tests currently require git 2.24 as far as I'm aware: `git status` has some changed output that I didn't try and handle in a compatible way. This patch has produced some interesting cleanups, most recently on the manifest type. I expect continuing down this road will produce other meritorious cleanups throughout our code. Differential Revision: https://phab.mercurial-scm.org/D6734

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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_new_heads is a hook to check that branches touched by new changesets

      have at most one open head. It can be used to enforce policies for

      merge-before-push or rebase-before-push. It does not handle pre-existing

      hydras.

      Usage:

        [hooks]

        pretxnclose.reject_new_heads = \

          python:hgext.hooklib.reject_new_heads.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"pretxnclose":

              raise error.Abort(

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

              )

          ctx = repo.unfiltered()[node]

          branches = set()

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

              rev = repo[rev]

              branches.add(rev.branch())

          for branch in branches:

              if len(repo.revs("head() and not closed() and branch(%s)", branch)) > 1:

                  raise error.Abort(

                      _(b'Changes on branch %r resulted in multiple heads')

                      % pycompat.bytestr(branch)

                  )

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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_new_heads is a hook to check that branches touched by new changesets
				have at most one open head. It can be used to enforce policies for
				merge-before-push or rebase-before-push. It does not handle pre-existing
				hydras.

				Usage:
				[hooks]
				pretxnclose.reject_new_heads = \
				python:hgext.hooklib.reject_new_heads.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"pretxnclose":
				raise error.Abort(
				_(b'Unsupported hook type %r') % pycompat.bytestr(hooktype)
				)
				ctx = repo.unfiltered()[node]
				branches = set()
				for rev in repo.changelog.revs(start=ctx.rev()):
				rev = repo[rev]
				branches.add(rev.branch())
				for branch in branches:
				if len(repo.revs("head() and not closed() and branch(%s)", branch)) > 1:
				raise error.Abort(
				_(b'Changes on branch %r resulted in multiple heads')
				% pycompat.bytestr(branch)
				)