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"""strip changesets and their descendants from history
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This extension allows you to strip changesets and all their descendants from the
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repository. See the command help for details.
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"""
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from __future__ import absolute_import
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from mercurial.i18n import _
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from mercurial import (
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bookmarks as bookmarksmod,
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cmdutil,
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error,
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hg,
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lock as lockmod,
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merge,
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node as nodemod,
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pycompat,
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registrar,
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repair,
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scmutil,
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util,
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)
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nullid = nodemod.nullid
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release = lockmod.release
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cmdtable = {}
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command = registrar.command(cmdtable)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = 'ships-with-hg-core'
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def checklocalchanges(repo, force=False):
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s = repo.status()
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if not force:
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cmdutil.checkunfinished(repo)
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cmdutil.bailifchanged(repo)
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else:
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cmdutil.checkunfinished(repo, skipmerge=True)
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return s
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def _findupdatetarget(repo, nodes):
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unode, p2 = repo.changelog.parents(nodes[0])
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currentbranch = repo[None].branch()
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if (util.safehasattr(repo, 'mq') and p2 != nullid
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and p2 in [x.node for x in repo.mq.applied]):
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unode = p2
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elif currentbranch != repo[unode].branch():
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pwdir = 'parents(wdir())'
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revset = 'max(((parents(%ln::%r) + %r) - %ln::%r) and branch(%s))'
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branchtarget = repo.revs(revset, nodes, pwdir, pwdir, nodes, pwdir,
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currentbranch)
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if branchtarget:
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cl = repo.changelog
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unode = cl.node(branchtarget.first())
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return unode
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def strip(ui, repo, revs, update=True, backup=True, force=None, bookmarks=None,
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soft=False):
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with repo.wlock(), repo.lock():
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if update:
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checklocalchanges(repo, force=force)
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urev = _findupdatetarget(repo, revs)
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hg.clean(repo, urev)
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repo.dirstate.write(repo.currenttransaction())
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if soft:
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repair.softstrip(ui, repo, revs, backup)
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else:
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repair.strip(ui, repo, revs, backup)
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repomarks = repo._bookmarks
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if bookmarks:
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with repo.transaction('strip') as tr:
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if repo._activebookmark in bookmarks:
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bookmarksmod.deactivate(repo)
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repomarks.applychanges(repo, tr, [(b, None) for b in bookmarks])
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for bookmark in sorted(bookmarks):
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ui.write(_("bookmark '%s' deleted\n") % bookmark)
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@command("strip",
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[
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('r', 'rev', [], _('strip specified revision (optional, '
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'can specify revisions without this '
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'option)'), _('REV')),
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('f', 'force', None, _('force removal of changesets, discard '
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'uncommitted changes (no backup)')),
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('', 'no-backup', None, _('do not save backup bundle')),
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('', 'nobackup', None, _('do not save backup bundle '
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'(DEPRECATED)')),
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('n', '', None, _('ignored (DEPRECATED)')),
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('k', 'keep', None, _("do not modify working directory during "
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"strip")),
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('B', 'bookmark', [], _("remove revs only reachable from given"
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" bookmark"), _('BOOKMARK')),
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('', 'soft', None,
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_("simply drop changesets from visible history (EXPERIMENTAL)")),
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],
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_('hg strip [-k] [-f] [-B bookmark] [-r] REV...'),
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helpcategory=command.CATEGORY_MAINTENANCE)
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def stripcmd(ui, repo, *revs, **opts):
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"""strip changesets and all their descendants from the repository
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The strip command removes the specified changesets and all their
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descendants. If the working directory has uncommitted changes, the
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operation is aborted unless the --force flag is supplied, in which
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case changes will be discarded.
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If a parent of the working directory is stripped, then the working
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directory will automatically be updated to the most recent
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available ancestor of the stripped parent after the operation
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completes.
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Any stripped changesets are stored in ``.hg/strip-backup`` as a
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bundle (see :hg:`help bundle` and :hg:`help unbundle`). They can
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be restored by running :hg:`unbundle .hg/strip-backup/BUNDLE`,
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where BUNDLE is the bundle file created by the strip. Note that
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the local revision numbers will in general be different after the
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restore.
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Use the --no-backup option to discard the backup bundle once the
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operation completes.
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Strip is not a history-rewriting operation and can be used on
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changesets in the public phase. But if the stripped changesets have
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been pushed to a remote repository you will likely pull them again.
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Return 0 on success.
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"""
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opts = pycompat.byteskwargs(opts)
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backup = True
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if opts.get('no_backup') or opts.get('nobackup'):
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backup = False
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cl = repo.changelog
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revs = list(revs) + opts.get('rev')
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revs = set(scmutil.revrange(repo, revs))
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with repo.wlock():
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bookmarks = set(opts.get('bookmark'))
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if bookmarks:
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repomarks = repo._bookmarks
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if not bookmarks.issubset(repomarks):
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raise error.Abort(_("bookmark '%s' not found") %
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','.join(sorted(bookmarks - set(repomarks.keys()))))
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# If the requested bookmark is not the only one pointing to a
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# a revision we have to only delete the bookmark and not strip
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# anything. revsets cannot detect that case.
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nodetobookmarks = {}
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for mark, node in repomarks.iteritems():
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nodetobookmarks.setdefault(node, []).append(mark)
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for marks in nodetobookmarks.values():
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if bookmarks.issuperset(marks):
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rsrevs = scmutil.bookmarkrevs(repo, marks[0])
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revs.update(set(rsrevs))
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if not revs:
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with repo.lock(), repo.transaction('bookmark') as tr:
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bmchanges = [(b, None) for b in bookmarks]
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repomarks.applychanges(repo, tr, bmchanges)
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for bookmark in sorted(bookmarks):
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ui.write(_("bookmark '%s' deleted\n") % bookmark)
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if not revs:
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raise error.Abort(_('empty revision set'))
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descendants = set(cl.descendants(revs))
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strippedrevs = revs.union(descendants)
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roots = revs.difference(descendants)
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# if one of the wdir parent is stripped we'll need
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# to update away to an earlier revision
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update = any(p != nullid and cl.rev(p) in strippedrevs
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for p in repo.dirstate.parents())
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rootnodes = set(cl.node(r) for r in roots)
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q = getattr(repo, 'mq', None)
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if q is not None and q.applied:
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# refresh queue state if we're about to strip
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# applied patches
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if cl.rev(repo.lookup('qtip')) in strippedrevs:
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q.applieddirty = True
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start = 0
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end = len(q.applied)
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for i, statusentry in enumerate(q.applied):
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if statusentry.node in rootnodes:
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# if one of the stripped roots is an applied
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# patch, only part of the queue is stripped
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start = i
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break
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del q.applied[start:end]
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q.savedirty()
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revs = sorted(rootnodes)
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if update and opts.get('keep'):
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urev = _findupdatetarget(repo, revs)
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uctx = repo[urev]
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# only reset the dirstate for files that would actually change
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# between the working context and uctx
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descendantrevs = repo.revs(b"%d::.", uctx.rev())
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changedfiles = []
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for rev in descendantrevs:
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# blindly reset the files, regardless of what actually changed
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changedfiles.extend(repo[rev].files())
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# reset files that only changed in the dirstate too
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dirstate = repo.dirstate
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dirchanges = [f for f in dirstate if dirstate[f] != 'n']
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changedfiles.extend(dirchanges)
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repo.dirstate.rebuild(urev, uctx.manifest(), changedfiles)
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repo.dirstate.write(repo.currenttransaction())
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# clear resolve state
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merge.mergestate.clean(repo, repo['.'].node())
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update = False
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strip(ui, repo, revs, backup=backup, update=update,
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force=opts.get('force'), bookmarks=bookmarks,
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soft=opts['soft'])
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return 0
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