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c12e300bb8
Summary: Move top-level Python packages `mercurial`, `hgext` and `hgdemandimport` to a new top-level package `edenscm`. This allows the Python packages provided by the upstream Mercurial to be installed side-by-side. To maintain compatibility, `edenscm/` gets added to `sys.path` in `mercurial/__init__.py`. Reviewed By: phillco, ikostia Differential Revision: D13853115 fbshipit-source-id: b296b0673dc54c61ef6a591ebc687057ff53b22e
50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
# rewriteutil.py - utility functions for rewriting changesets
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#
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# Copyright 2017 Octobus <contact@octobus.net>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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from . import error, node, obsolete, revset
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from .i18n import _
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def precheck(repo, revs, action="rewrite"):
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"""check if revs can be rewritten
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action is used to control the error message.
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Make sure this function is called after taking the lock.
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"""
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if node.nullrev in revs:
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msg = _("cannot %s null changeset") % (action)
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hint = _("no changeset checked out")
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raise error.Abort(msg, hint=hint)
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publicrevs = repo.revs("%ld and public()", revs)
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if len(repo[None].parents()) > 1:
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raise error.Abort(_("cannot %s while merging") % action)
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if publicrevs:
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msg = _("cannot %s public changesets") % (action)
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hint = _("see 'hg help phases' for details")
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raise error.Abort(msg, hint=hint)
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newunstable = disallowednewunstable(repo, revs)
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if newunstable:
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raise error.Abort(_("cannot %s changeset with children") % action)
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def disallowednewunstable(repo, revs):
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"""Checks whether editing the revs will create new unstable changesets and
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are we allowed to create them.
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To allow new unstable changesets, set the config:
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`experimental.evolution.allowunstable=True`
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"""
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allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
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if allowunstable:
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return revset.baseset()
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return repo.revs("(%ld::) - %ld", revs, revs)
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