mercurial/rewriteutil.py
author Boris Feld <boris.feld@octobus.net>
Sat, 18 Aug 2018 12:45:44 +0200
changeset 39490 966950954fda
parent 35243 490df753894d
child 40636 8c6329fa6038
permissions -rw-r--r--
tests: add a `tests/artifacts/` directory That directory is meant to cache large items used by tests that are slow to generate. See 'PURPOSE' file for details and next changesets for a first user.
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# 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 .i18n import _
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from . import (
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    error,
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    node,
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    obsolete,
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    revset,
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)
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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)