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# rebase.py - rebasing feature for mercurial
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#
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# Copyright 2008 Stefano Tortarolo <stefano.tortarolo at gmail dot com>
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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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'''command to move sets of revisions to a different ancestor
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This extension lets you rebase changesets in an existing Mercurial
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repository.
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For more information:
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http://mercurial.selenic.com/wiki/RebaseExtension
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'''
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from mercurial import hg, util, repair, merge, cmdutil, commands, bookmarks
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from mercurial import extensions, patch, scmutil, phases, obsolete, error
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from mercurial import copies, repoview
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from mercurial.commands import templateopts
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from mercurial.node import nullrev, nullid, hex, short
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from mercurial.lock import release
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from mercurial.i18n import _
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import os, errno
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revtodo = -1
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nullmerge = -2
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revignored = -3
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cmdtable = {}
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command = cmdutil.command(cmdtable)
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# Note for extension authors: ONLY specify testedwith = 'internal' 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 = 'internal'
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def _savegraft(ctx, extra):
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s = ctx.extra().get('source', None)
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if s is not None:
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extra['source'] = s
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def _savebranch(ctx, extra):
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extra['branch'] = ctx.branch()
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def _makeextrafn(copiers):
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"""make an extrafn out of the given copy-functions.
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A copy function takes a context and an extra dict, and mutates the
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extra dict as needed based on the given context.
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"""
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def extrafn(ctx, extra):
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for c in copiers:
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c(ctx, extra)
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return extrafn
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@command('rebase',
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[('s', 'source', '',
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_('rebase the specified changeset and descendants'), _('REV')),
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('b', 'base', '',
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_('rebase everything from branching point of specified changeset'),
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_('REV')),
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('r', 'rev', [],
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_('rebase these revisions'),
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_('REV')),
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('d', 'dest', '',
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_('rebase onto the specified changeset'), _('REV')),
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('', 'collapse', False, _('collapse the rebased changesets')),
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('m', 'message', '',
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_('use text as collapse commit message'), _('TEXT')),
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('e', 'edit', False, _('invoke editor on commit messages')),
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('l', 'logfile', '',
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_('read collapse commit message from file'), _('FILE')),
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('k', 'keep', False, _('keep original changesets')),
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('', 'keepbranches', False, _('keep original branch names')),
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('D', 'detach', False, _('(DEPRECATED)')),
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('i', 'interactive', False, _('(DEPRECATED)')),
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('t', 'tool', '', _('specify merge tool')),
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('c', 'continue', False, _('continue an interrupted rebase')),
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('a', 'abort', False, _('abort an interrupted rebase'))] +
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templateopts,
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_('[-s REV | -b REV] [-d REV] [OPTION]'))
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def rebase(ui, repo, **opts):
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"""move changeset (and descendants) to a different branch
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Rebase uses repeated merging to graft changesets from one part of
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history (the source) onto another (the destination). This can be
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useful for linearizing *local* changes relative to a master
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development tree.
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You should not rebase changesets that have already been shared
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with others. Doing so will force everybody else to perform the
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same rebase or they will end up with duplicated changesets after
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pulling in your rebased changesets.
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In its default configuration, Mercurial will prevent you from
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rebasing published changes. See :hg:`help phases` for details.
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If you don't specify a destination changeset (``-d/--dest``),
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rebase uses the current branch tip as the destination. (The
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destination changeset is not modified by rebasing, but new
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changesets are added as its descendants.)
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You can specify which changesets to rebase in two ways: as a
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"source" changeset or as a "base" changeset. Both are shorthand
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for a topologically related set of changesets (the "source
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branch"). If you specify source (``-s/--source``), rebase will
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rebase that changeset and all of its descendants onto dest. If you
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specify base (``-b/--base``), rebase will select ancestors of base
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back to but not including the common ancestor with dest. Thus,
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``-b`` is less precise but more convenient than ``-s``: you can
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specify any changeset in the source branch, and rebase will select
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the whole branch. If you specify neither ``-s`` nor ``-b``, rebase
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uses the parent of the working directory as the base.
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For advanced usage, a third way is available through the ``--rev``
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option. It allows you to specify an arbitrary set of changesets to
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rebase. Descendants of revs you specify with this option are not
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automatically included in the rebase.
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By default, rebase recreates the changesets in the source branch
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as descendants of dest and then destroys the originals. Use
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``--keep`` to preserve the original source changesets. Some
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changesets in the source branch (e.g. merges from the destination
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branch) may be dropped if they no longer contribute any change.
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One result of the rules for selecting the destination changeset
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and source branch is that, unlike ``merge``, rebase will do
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nothing if you are at the branch tip of a named branch
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with two heads. You need to explicitly specify source and/or
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destination (or ``update`` to the other head, if it's the head of
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the intended source branch).
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If a rebase is interrupted to manually resolve a merge, it can be
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continued with --continue/-c or aborted with --abort/-a.
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.. container:: verbose
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Examples:
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- move "local changes" (current commit back to branching point)
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to the current branch tip after a pull::
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hg rebase
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- move a single changeset to the stable branch::
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hg rebase -r 5f493448 -d stable
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- splice a commit and all its descendants onto another part of history::
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hg rebase --source c0c3 --dest 4cf9
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- rebase everything on a branch marked by a bookmark onto the
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default branch::
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hg rebase --base myfeature --dest default
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- collapse a sequence of changes into a single commit::
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hg rebase --collapse -r 1520:1525 -d .
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- move a named branch while preserving its name::
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hg rebase -r "branch(featureX)" -d 1.3 --keepbranches
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Returns 0 on success, 1 if nothing to rebase or there are
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unresolved conflicts.
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"""
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originalwd = target = None
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activebookmark = None
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external = nullrev
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state = {}
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skipped = set()
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targetancestors = set()
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lock = wlock = None
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try:
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wlock = repo.wlock()
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lock = repo.lock()
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# Validate input and define rebasing points
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destf = opts.get('dest', None)
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srcf = opts.get('source', None)
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basef = opts.get('base', None)
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revf = opts.get('rev', [])
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contf = opts.get('continue')
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abortf = opts.get('abort')
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collapsef = opts.get('collapse', False)
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collapsemsg = cmdutil.logmessage(ui, opts)
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e = opts.get('extrafn') # internal, used by e.g. hgsubversion
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extrafns = [_savegraft]
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if e:
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extrafns = [e]
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keepf = opts.get('keep', False)
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keepbranchesf = opts.get('keepbranches', False)
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# keepopen is not meant for use on the command line, but by
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# other extensions
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keepopen = opts.get('keepopen', False)
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if opts.get('interactive'):
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msg = _("interactive history editing is supported by the "
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"'histedit' extension (see \"hg help histedit\")")
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raise util.Abort(msg)
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if collapsemsg and not collapsef:
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raise util.Abort(
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_('message can only be specified with collapse'))
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if contf or abortf:
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if contf and abortf:
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raise util.Abort(_('cannot use both abort and continue'))
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if collapsef:
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raise util.Abort(
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_('cannot use collapse with continue or abort'))
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if srcf or basef or destf:
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raise util.Abort(
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_('abort and continue do not allow specifying revisions'))
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if opts.get('tool', False):
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ui.warn(_('tool option will be ignored\n'))
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try:
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(originalwd, target, state, skipped, collapsef, keepf,
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keepbranchesf, external, activebookmark) = restorestatus(repo)
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except error.RepoLookupError:
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if abortf:
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clearstatus(repo)
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repo.ui.warn(_('rebase aborted (no revision is removed,'
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' only broken state is cleared)\n'))
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return 0
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else:
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msg = _('cannot continue inconsistent rebase')
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hint = _('use "hg rebase --abort" to clear broken state')
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raise util.Abort(msg, hint=hint)
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if abortf:
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return abort(repo, originalwd, target, state,
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activebookmark=activebookmark)
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else:
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if srcf and basef:
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raise util.Abort(_('cannot specify both a '
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'source and a base'))
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if revf and basef:
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raise util.Abort(_('cannot specify both a '
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'revision and a base'))
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if revf and srcf:
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raise util.Abort(_('cannot specify both a '
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'revision and a source'))
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cmdutil.checkunfinished(repo)
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cmdutil.bailifchanged(repo)
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if not destf:
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# Destination defaults to the latest revision in the
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# current branch
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branch = repo[None].branch()
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dest = repo[branch]
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else:
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dest = scmutil.revsingle(repo, destf)
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if revf:
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rebaseset = scmutil.revrange(repo, revf)
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if not rebaseset:
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ui.status(_('empty "rev" revision set - '
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'nothing to rebase\n'))
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return 1
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elif srcf:
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src = scmutil.revrange(repo, [srcf])
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if not src:
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ui.status(_('empty "source" revision set - '
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'nothing to rebase\n'))
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return 1
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rebaseset = repo.revs('(%ld)::', src)
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assert rebaseset
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else:
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base = scmutil.revrange(repo, [basef or '.'])
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if not base:
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ui.status(_('empty "base" revision set - '
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"can't compute rebase set\n"))
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return 1
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commonanc = repo.revs('ancestor(%ld, %d)', base, dest).first()
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if commonanc is not None:
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rebaseset = repo.revs('(%d::(%ld) - %d)::',
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commonanc, base, commonanc)
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else:
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rebaseset = []
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if not rebaseset:
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# transform to list because smartsets are not comparable to
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# lists. This should be improved to honor laziness of
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# smartset.
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if list(base) == [dest.rev()]:
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if basef:
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ui.status(_('nothing to rebase - %s is both "base"'
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' and destination\n') % dest)
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else:
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ui.status(_('nothing to rebase - working directory '
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'parent is also destination\n'))
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elif not repo.revs('%ld - ::%d', base, dest):
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if basef:
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ui.status(_('nothing to rebase - "base" %s is '
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'already an ancestor of destination '
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'%s\n') %
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('+'.join(str(repo[r]) for r in base),
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dest))
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else:
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ui.status(_('nothing to rebase - working '
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'directory parent is already an '
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'ancestor of destination %s\n') % dest)
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else: # can it happen?
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ui.status(_('nothing to rebase from %s to %s\n') %
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('+'.join(str(repo[r]) for r in base), dest))
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return 1
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allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
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if (not (keepf or allowunstable)
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and repo.revs('first(children(%ld) - %ld)',
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rebaseset, rebaseset)):
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raise util.Abort(
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_("can't remove original changesets with"
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" unrebased descendants"),
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hint=_('use --keep to keep original changesets'))
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result = buildstate(repo, dest, rebaseset, collapsef)
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if not result:
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# Empty state built, nothing to rebase
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ui.status(_('nothing to rebase\n'))
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return 1
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root = min(rebaseset)
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if not keepf and not repo[root].mutable():
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raise util.Abort(_("can't rebase public changeset %s")
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% repo[root],
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hint=_('see "hg help phases" for details'))
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originalwd, target, state = result
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if collapsef:
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targetancestors = repo.changelog.ancestors([target],
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inclusive=True)
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external = externalparent(repo, state, targetancestors)
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if dest.closesbranch() and not keepbranchesf:
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ui.status(_('reopening closed branch head %s\n') % dest)
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if keepbranchesf:
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# insert _savebranch at the start of extrafns so if
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# there's a user-provided extrafn it can clobber branch if
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# desired
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extrafns.insert(0, _savebranch)
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if collapsef:
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branches = set()
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for rev in state:
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branches.add(repo[rev].branch())
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if len(branches) > 1:
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raise util.Abort(_('cannot collapse multiple named '
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'branches'))
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# Rebase
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if not targetancestors:
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targetancestors = repo.changelog.ancestors([target], inclusive=True)
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# Keep track of the current bookmarks in order to reset them later
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currentbookmarks = repo._bookmarks.copy()
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activebookmark = activebookmark or repo._activebookmark
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if activebookmark:
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bookmarks.deactivate(repo)
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extrafn = _makeextrafn(extrafns)
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sortedstate = sorted(state)
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total = len(sortedstate)
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pos = 0
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for rev in sortedstate:
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ctx = repo[rev]
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desc = '%d:%s "%s"' % (ctx.rev(), ctx,
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ctx.description().split('\n', 1)[0])
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names = repo.nodetags(ctx.node()) + repo.nodebookmarks(ctx.node())
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if names:
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desc += ' (%s)' % ' '.join(names)
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pos += 1
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if state[rev] == revtodo:
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ui.status(_('rebasing %s\n') % desc)
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ui.progress(_("rebasing"), pos, ("%d:%s" % (rev, ctx)),
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_('changesets'), total)
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p1, p2, base = defineparents(repo, rev, target, state,
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targetancestors)
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storestatus(repo, originalwd, target, state, collapsef, keepf,
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keepbranchesf, external, activebookmark)
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if len(repo.parents()) == 2:
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repo.ui.debug('resuming interrupted rebase\n')
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else:
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try:
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ui.setconfig('ui', 'forcemerge', opts.get('tool', ''),
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'rebase')
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stats = rebasenode(repo, rev, p1, base, state,
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collapsef, target)
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if stats and stats[3] > 0:
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raise error.InterventionRequired(
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_('unresolved conflicts (see hg '
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'resolve, then hg rebase --continue)'))
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finally:
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ui.setconfig('ui', 'forcemerge', '', 'rebase')
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if not collapsef:
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merging = p2 != nullrev
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editform = cmdutil.mergeeditform(merging, 'rebase')
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editor = cmdutil.getcommiteditor(editform=editform, **opts)
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newnode = concludenode(repo, rev, p1, p2, extrafn=extrafn,
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editor=editor)
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else:
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# Skip commit if we are collapsing
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repo.dirstate.beginparentchange()
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repo.setparents(repo[p1].node())
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repo.dirstate.endparentchange()
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newnode = None
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# Update the state
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if newnode is not None:
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state[rev] = repo[newnode].rev()
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ui.debug('rebased as %s\n' % short(newnode))
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else:
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|
|
ui.warn(_('note: rebase of %d:%s created no changes '
|
|
|
'to commit\n') % (rev, ctx))
|
|
|
if not collapsef:
|
|
|
skipped.add(rev)
|
|
|
state[rev] = p1
|
|
|
ui.debug('next revision set to %s\n' % p1)
|
|
|
elif state[rev] == nullmerge:
|
|
|
ui.debug('ignoring null merge rebase of %s\n' % rev)
|
|
|
elif state[rev] == revignored:
|
|
|
ui.status(_('not rebasing ignored %s\n') % desc)
|
|
|
else:
|
|
|
ui.status(_('already rebased %s as %s\n') %
|
|
|
(desc, repo[state[rev]]))
|
|
|
|
|
|
ui.progress(_('rebasing'), None)
|
|
|
ui.note(_('rebase merging completed\n'))
|
|
|
|
|
|
if collapsef and not keepopen:
|
|
|
p1, p2, _base = defineparents(repo, min(state), target,
|
|
|
state, targetancestors)
|
|
|
editopt = opts.get('edit')
|
|
|
editform = 'rebase.collapse'
|
|
|
if collapsemsg:
|
|
|
commitmsg = collapsemsg
|
|
|
else:
|
|
|
commitmsg = 'Collapsed revision'
|
|
|
for rebased in state:
|
|
|
if rebased not in skipped and state[rebased] > nullmerge:
|
|
|
commitmsg += '\n* %s' % repo[rebased].description()
|
|
|
editopt = True
|
|
|
editor = cmdutil.getcommiteditor(edit=editopt, editform=editform)
|
|
|
newnode = concludenode(repo, rev, p1, external, commitmsg=commitmsg,
|
|
|
extrafn=extrafn, editor=editor)
|
|
|
if newnode is None:
|
|
|
newrev = target
|
|
|
else:
|
|
|
newrev = repo[newnode].rev()
|
|
|
for oldrev in state.iterkeys():
|
|
|
if state[oldrev] > nullmerge:
|
|
|
state[oldrev] = newrev
|
|
|
|
|
|
if 'qtip' in repo.tags():
|
|
|
updatemq(repo, state, skipped, **opts)
|
|
|
|
|
|
if currentbookmarks:
|
|
|
# Nodeids are needed to reset bookmarks
|
|
|
nstate = {}
|
|
|
for k, v in state.iteritems():
|
|
|
if v > nullmerge:
|
|
|
nstate[repo[k].node()] = repo[v].node()
|
|
|
# XXX this is the same as dest.node() for the non-continue path --
|
|
|
# this should probably be cleaned up
|
|
|
targetnode = repo[target].node()
|
|
|
|
|
|
# restore original working directory
|
|
|
# (we do this before stripping)
|
|
|
newwd = state.get(originalwd, originalwd)
|
|
|
if newwd < 0:
|
|
|
# original directory is a parent of rebase set root or ignored
|
|
|
newwd = originalwd
|
|
|
if newwd not in [c.rev() for c in repo[None].parents()]:
|
|
|
ui.note(_("update back to initial working directory parent\n"))
|
|
|
hg.updaterepo(repo, newwd, False)
|
|
|
|
|
|
if not keepf:
|
|
|
collapsedas = None
|
|
|
if collapsef:
|
|
|
collapsedas = newnode
|
|
|
clearrebased(ui, repo, state, skipped, collapsedas)
|
|
|
|
|
|
if currentbookmarks:
|
|
|
updatebookmarks(repo, targetnode, nstate, currentbookmarks)
|
|
|
if activebookmark not in repo._bookmarks:
|
|
|
# active bookmark was divergent one and has been deleted
|
|
|
activebookmark = None
|
|
|
|
|
|
clearstatus(repo)
|
|
|
ui.note(_("rebase completed\n"))
|
|
|
util.unlinkpath(repo.sjoin('undo'), ignoremissing=True)
|
|
|
if skipped:
|
|
|
ui.note(_("%d revisions have been skipped\n") % len(skipped))
|
|
|
|
|
|
if (activebookmark and
|
|
|
repo['.'].node() == repo._bookmarks[activebookmark]):
|
|
|
bookmarks.activate(repo, activebookmark)
|
|
|
|
|
|
finally:
|
|
|
release(lock, wlock)
|
|
|
|
|
|
def externalparent(repo, state, targetancestors):
|
|
|
"""Return the revision that should be used as the second parent
|
|
|
when the revisions in state is collapsed on top of targetancestors.
|
|
|
Abort if there is more than one parent.
|
|
|
"""
|
|
|
parents = set()
|
|
|
source = min(state)
|
|
|
for rev in state:
|
|
|
if rev == source:
|
|
|
continue
|
|
|
for p in repo[rev].parents():
|
|
|
if (p.rev() not in state
|
|
|
and p.rev() not in targetancestors):
|
|
|
parents.add(p.rev())
|
|
|
if not parents:
|
|
|
return nullrev
|
|
|
if len(parents) == 1:
|
|
|
return parents.pop()
|
|
|
raise util.Abort(_('unable to collapse on top of %s, there is more '
|
|
|
'than one external parent: %s') %
|
|
|
(max(targetancestors),
|
|
|
', '.join(str(p) for p in sorted(parents))))
|
|
|
|
|
|
def concludenode(repo, rev, p1, p2, commitmsg=None, editor=None, extrafn=None):
|
|
|
'''Commit the wd changes with parents p1 and p2. Reuse commit info from rev
|
|
|
but also store useful information in extra.
|
|
|
Return node of committed revision.'''
|
|
|
dsguard = cmdutil.dirstateguard(repo, 'rebase')
|
|
|
try:
|
|
|
repo.setparents(repo[p1].node(), repo[p2].node())
|
|
|
ctx = repo[rev]
|
|
|
if commitmsg is None:
|
|
|
commitmsg = ctx.description()
|
|
|
extra = {'rebase_source': ctx.hex()}
|
|
|
if extrafn:
|
|
|
extrafn(ctx, extra)
|
|
|
|
|
|
backup = repo.ui.backupconfig('phases', 'new-commit')
|
|
|
try:
|
|
|
targetphase = max(ctx.phase(), phases.draft)
|
|
|
repo.ui.setconfig('phases', 'new-commit', targetphase, 'rebase')
|
|
|
# Commit might fail if unresolved files exist
|
|
|
newnode = repo.commit(text=commitmsg, user=ctx.user(),
|
|
|
date=ctx.date(), extra=extra, editor=editor)
|
|
|
finally:
|
|
|
repo.ui.restoreconfig(backup)
|
|
|
|
|
|
repo.dirstate.setbranch(repo[newnode].branch())
|
|
|
dsguard.close()
|
|
|
return newnode
|
|
|
finally:
|
|
|
release(dsguard)
|
|
|
|
|
|
def rebasenode(repo, rev, p1, base, state, collapse, target):
|
|
|
'Rebase a single revision rev on top of p1 using base as merge ancestor'
|
|
|
# Merge phase
|
|
|
# Update to target and merge it with local
|
|
|
if repo['.'].rev() != p1:
|
|
|
repo.ui.debug(" update to %d:%s\n" % (p1, repo[p1]))
|
|
|
merge.update(repo, p1, False, True, False)
|
|
|
else:
|
|
|
repo.ui.debug(" already in target\n")
|
|
|
repo.dirstate.write()
|
|
|
repo.ui.debug(" merge against %d:%s\n" % (rev, repo[rev]))
|
|
|
if base is not None:
|
|
|
repo.ui.debug(" detach base %d:%s\n" % (base, repo[base]))
|
|
|
# When collapsing in-place, the parent is the common ancestor, we
|
|
|
# have to allow merging with it.
|
|
|
stats = merge.update(repo, rev, True, True, False, base, collapse,
|
|
|
labels=['dest', 'source'])
|
|
|
if collapse:
|
|
|
copies.duplicatecopies(repo, rev, target)
|
|
|
else:
|
|
|
# If we're not using --collapse, we need to
|
|
|
# duplicate copies between the revision we're
|
|
|
# rebasing and its first parent, but *not*
|
|
|
# duplicate any copies that have already been
|
|
|
# performed in the destination.
|
|
|
p1rev = repo[rev].p1().rev()
|
|
|
copies.duplicatecopies(repo, rev, p1rev, skiprev=target)
|
|
|
return stats
|
|
|
|
|
|
def nearestrebased(repo, rev, state):
|
|
|
"""return the nearest ancestors of rev in the rebase result"""
|
|
|
rebased = [r for r in state if state[r] > nullmerge]
|
|
|
candidates = repo.revs('max(%ld and (::%d))', rebased, rev)
|
|
|
if candidates:
|
|
|
return state[candidates.first()]
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
def defineparents(repo, rev, target, state, targetancestors):
|
|
|
'Return the new parent relationship of the revision that will be rebased'
|
|
|
parents = repo[rev].parents()
|
|
|
p1 = p2 = nullrev
|
|
|
|
|
|
p1n = parents[0].rev()
|
|
|
if p1n in targetancestors:
|
|
|
p1 = target
|
|
|
elif p1n in state:
|
|
|
if state[p1n] == nullmerge:
|
|
|
p1 = target
|
|
|
elif state[p1n] == revignored:
|
|
|
p1 = nearestrebased(repo, p1n, state)
|
|
|
if p1 is None:
|
|
|
p1 = target
|
|
|
else:
|
|
|
p1 = state[p1n]
|
|
|
else: # p1n external
|
|
|
p1 = target
|
|
|
p2 = p1n
|
|
|
|
|
|
if len(parents) == 2 and parents[1].rev() not in targetancestors:
|
|
|
p2n = parents[1].rev()
|
|
|
# interesting second parent
|
|
|
if p2n in state:
|
|
|
if p1 == target: # p1n in targetancestors or external
|
|
|
p1 = state[p2n]
|
|
|
elif state[p2n] == revignored:
|
|
|
p2 = nearestrebased(repo, p2n, state)
|
|
|
if p2 is None:
|
|
|
# no ancestors rebased yet, detach
|
|
|
p2 = target
|
|
|
else:
|
|
|
p2 = state[p2n]
|
|
|
else: # p2n external
|
|
|
if p2 != nullrev: # p1n external too => rev is a merged revision
|
|
|
raise util.Abort(_('cannot use revision %d as base, result '
|
|
|
'would have 3 parents') % rev)
|
|
|
p2 = p2n
|
|
|
repo.ui.debug(" future parents are %d and %d\n" %
|
|
|
(repo[p1].rev(), repo[p2].rev()))
|
|
|
|
|
|
if rev == min(state):
|
|
|
# Case (1) initial changeset of a non-detaching rebase.
|
|
|
# Let the merge mechanism find the base itself.
|
|
|
base = None
|
|
|
elif not repo[rev].p2():
|
|
|
# Case (2) detaching the node with a single parent, use this parent
|
|
|
base = repo[rev].p1().rev()
|
|
|
else:
|
|
|
# Assuming there is a p1, this is the case where there also is a p2.
|
|
|
# We are thus rebasing a merge and need to pick the right merge base.
|
|
|
#
|
|
|
# Imagine we have:
|
|
|
# - M: current rebase revision in this step
|
|
|
# - A: one parent of M
|
|
|
# - B: other parent of M
|
|
|
# - D: destination of this merge step (p1 var)
|
|
|
#
|
|
|
# Consider the case where D is a descendant of A or B and the other is
|
|
|
# 'outside'. In this case, the right merge base is the D ancestor.
|
|
|
#
|
|
|
# An informal proof, assuming A is 'outside' and B is the D ancestor:
|
|
|
#
|
|
|
# If we pick B as the base, the merge involves:
|
|
|
# - changes from B to M (actual changeset payload)
|
|
|
# - changes from B to D (induced by rebase) as D is a rebased
|
|
|
# version of B)
|
|
|
# Which exactly represent the rebase operation.
|
|
|
#
|
|
|
# If we pick A as the base, the merge involves:
|
|
|
# - changes from A to M (actual changeset payload)
|
|
|
# - changes from A to D (with include changes between unrelated A and B
|
|
|
# plus changes induced by rebase)
|
|
|
# Which does not represent anything sensible and creates a lot of
|
|
|
# conflicts. A is thus not the right choice - B is.
|
|
|
#
|
|
|
# Note: The base found in this 'proof' is only correct in the specified
|
|
|
# case. This base does not make sense if is not D a descendant of A or B
|
|
|
# or if the other is not parent 'outside' (especially not if the other
|
|
|
# parent has been rebased). The current implementation does not
|
|
|
# make it feasible to consider different cases separately. In these
|
|
|
# other cases we currently just leave it to the user to correctly
|
|
|
# resolve an impossible merge using a wrong ancestor.
|
|
|
for p in repo[rev].parents():
|
|
|
if state.get(p.rev()) == p1:
|
|
|
base = p.rev()
|
|
|
break
|
|
|
else: # fallback when base not found
|
|
|
base = None
|
|
|
|
|
|
# Raise because this function is called wrong (see issue 4106)
|
|
|
raise AssertionError('no base found to rebase on '
|
|
|
'(defineparents called wrong)')
|
|
|
return p1, p2, base
|
|
|
|
|
|
def isagitpatch(repo, patchname):
|
|
|
'Return true if the given patch is in git format'
|
|
|
mqpatch = os.path.join(repo.mq.path, patchname)
|
|
|
for line in patch.linereader(file(mqpatch, 'rb')):
|
|
|
if line.startswith('diff --git'):
|
|
|
return True
|
|
|
return False
|
|
|
|
|
|
def updatemq(repo, state, skipped, **opts):
|
|
|
'Update rebased mq patches - finalize and then import them'
|
|
|
mqrebase = {}
|
|
|
mq = repo.mq
|
|
|
original_series = mq.fullseries[:]
|
|
|
skippedpatches = set()
|
|
|
|
|
|
for p in mq.applied:
|
|
|
rev = repo[p.node].rev()
|
|
|
if rev in state:
|
|
|
repo.ui.debug('revision %d is an mq patch (%s), finalize it.\n' %
|
|
|
(rev, p.name))
|
|
|
mqrebase[rev] = (p.name, isagitpatch(repo, p.name))
|
|
|
else:
|
|
|
# Applied but not rebased, not sure this should happen
|
|
|
skippedpatches.add(p.name)
|
|
|
|
|
|
if mqrebase:
|
|
|
mq.finish(repo, mqrebase.keys())
|
|
|
|
|
|
# We must start import from the newest revision
|
|
|
for rev in sorted(mqrebase, reverse=True):
|
|
|
if rev not in skipped:
|
|
|
name, isgit = mqrebase[rev]
|
|
|
repo.ui.note(_('updating mq patch %s to %s:%s\n') %
|
|
|
(name, state[rev], repo[state[rev]]))
|
|
|
mq.qimport(repo, (), patchname=name, git=isgit,
|
|
|
rev=[str(state[rev])])
|
|
|
else:
|
|
|
# Rebased and skipped
|
|
|
skippedpatches.add(mqrebase[rev][0])
|
|
|
|
|
|
# Patches were either applied and rebased and imported in
|
|
|
# order, applied and removed or unapplied. Discard the removed
|
|
|
# ones while preserving the original series order and guards.
|
|
|
newseries = [s for s in original_series
|
|
|
if mq.guard_re.split(s, 1)[0] not in skippedpatches]
|
|
|
mq.fullseries[:] = newseries
|
|
|
mq.seriesdirty = True
|
|
|
mq.savedirty()
|
|
|
|
|
|
def updatebookmarks(repo, targetnode, nstate, originalbookmarks):
|
|
|
'Move bookmarks to their correct changesets, and delete divergent ones'
|
|
|
marks = repo._bookmarks
|
|
|
for k, v in originalbookmarks.iteritems():
|
|
|
if v in nstate:
|
|
|
# update the bookmarks for revs that have moved
|
|
|
marks[k] = nstate[v]
|
|
|
bookmarks.deletedivergent(repo, [targetnode], k)
|
|
|
|
|
|
marks.write()
|
|
|
|
|
|
def storestatus(repo, originalwd, target, state, collapse, keep, keepbranches,
|
|
|
external, activebookmark):
|
|
|
'Store the current status to allow recovery'
|
|
|
f = repo.vfs("rebasestate", "w")
|
|
|
f.write(repo[originalwd].hex() + '\n')
|
|
|
f.write(repo[target].hex() + '\n')
|
|
|
f.write(repo[external].hex() + '\n')
|
|
|
f.write('%d\n' % int(collapse))
|
|
|
f.write('%d\n' % int(keep))
|
|
|
f.write('%d\n' % int(keepbranches))
|
|
|
f.write('%s\n' % (activebookmark or ''))
|
|
|
for d, v in state.iteritems():
|
|
|
oldrev = repo[d].hex()
|
|
|
if v >= 0:
|
|
|
newrev = repo[v].hex()
|
|
|
elif v == revtodo:
|
|
|
# To maintain format compatibility, we have to use nullid.
|
|
|
# Please do remove this special case when upgrading the format.
|
|
|
newrev = hex(nullid)
|
|
|
else:
|
|
|
newrev = v
|
|
|
f.write("%s:%s\n" % (oldrev, newrev))
|
|
|
f.close()
|
|
|
repo.ui.debug('rebase status stored\n')
|
|
|
|
|
|
def clearstatus(repo):
|
|
|
'Remove the status files'
|
|
|
_clearrebasesetvisibiliy(repo)
|
|
|
util.unlinkpath(repo.join("rebasestate"), ignoremissing=True)
|
|
|
|
|
|
def restorestatus(repo):
|
|
|
'Restore a previously stored status'
|
|
|
try:
|
|
|
keepbranches = None
|
|
|
target = None
|
|
|
collapse = False
|
|
|
external = nullrev
|
|
|
activebookmark = None
|
|
|
state = {}
|
|
|
f = repo.vfs("rebasestate")
|
|
|
for i, l in enumerate(f.read().splitlines()):
|
|
|
if i == 0:
|
|
|
originalwd = repo[l].rev()
|
|
|
elif i == 1:
|
|
|
target = repo[l].rev()
|
|
|
elif i == 2:
|
|
|
external = repo[l].rev()
|
|
|
elif i == 3:
|
|
|
collapse = bool(int(l))
|
|
|
elif i == 4:
|
|
|
keep = bool(int(l))
|
|
|
elif i == 5:
|
|
|
keepbranches = bool(int(l))
|
|
|
elif i == 6 and not (len(l) == 81 and ':' in l):
|
|
|
# line 6 is a recent addition, so for backwards compatibility
|
|
|
# check that the line doesn't look like the oldrev:newrev lines
|
|
|
activebookmark = l
|
|
|
else:
|
|
|
oldrev, newrev = l.split(':')
|
|
|
if newrev in (str(nullmerge), str(revignored)):
|
|
|
state[repo[oldrev].rev()] = int(newrev)
|
|
|
elif newrev == nullid:
|
|
|
state[repo[oldrev].rev()] = revtodo
|
|
|
# Legacy compat special case
|
|
|
else:
|
|
|
state[repo[oldrev].rev()] = repo[newrev].rev()
|
|
|
|
|
|
if keepbranches is None:
|
|
|
raise util.Abort(_('.hg/rebasestate is incomplete'))
|
|
|
|
|
|
skipped = set()
|
|
|
# recompute the set of skipped revs
|
|
|
if not collapse:
|
|
|
seen = set([target])
|
|
|
for old, new in sorted(state.items()):
|
|
|
if new != revtodo and new in seen:
|
|
|
skipped.add(old)
|
|
|
seen.add(new)
|
|
|
repo.ui.debug('computed skipped revs: %s\n' %
|
|
|
(' '.join(str(r) for r in sorted(skipped)) or None))
|
|
|
repo.ui.debug('rebase status resumed\n')
|
|
|
_setrebasesetvisibility(repo, state.keys())
|
|
|
return (originalwd, target, state, skipped,
|
|
|
collapse, keep, keepbranches, external, activebookmark)
|
|
|
except IOError as err:
|
|
|
if err.errno != errno.ENOENT:
|
|
|
raise
|
|
|
raise util.Abort(_('no rebase in progress'))
|
|
|
|
|
|
def needupdate(repo, state):
|
|
|
'''check whether we should `update --clean` away from a merge, or if
|
|
|
somehow the working dir got forcibly updated, e.g. by older hg'''
|
|
|
parents = [p.rev() for p in repo.parents()]
|
|
|
|
|
|
# Are we in a merge state at all?
|
|
|
if len(parents) < 2:
|
|
|
return False
|
|
|
|
|
|
# We should be standing on the first as-of-yet unrebased commit.
|
|
|
firstunrebased = min([old for old, new in state.iteritems()
|
|
|
if new == nullrev])
|
|
|
if firstunrebased in parents:
|
|
|
return True
|
|
|
|
|
|
return False
|
|
|
|
|
|
def abort(repo, originalwd, target, state, activebookmark=None):
|
|
|
'''Restore the repository to its original state. Additional args:
|
|
|
|
|
|
activebookmark: the name of the bookmark that should be active after the
|
|
|
restore'''
|
|
|
dstates = [s for s in state.values() if s >= 0]
|
|
|
immutable = [d for d in dstates if not repo[d].mutable()]
|
|
|
cleanup = True
|
|
|
if immutable:
|
|
|
repo.ui.warn(_("warning: can't clean up public changesets %s\n")
|
|
|
% ', '.join(str(repo[r]) for r in immutable),
|
|
|
hint=_('see "hg help phases" for details'))
|
|
|
cleanup = False
|
|
|
|
|
|
descendants = set()
|
|
|
if dstates:
|
|
|
descendants = set(repo.changelog.descendants(dstates))
|
|
|
if descendants - set(dstates):
|
|
|
repo.ui.warn(_("warning: new changesets detected on target branch, "
|
|
|
"can't strip\n"))
|
|
|
cleanup = False
|
|
|
|
|
|
if cleanup:
|
|
|
# Update away from the rebase if necessary
|
|
|
if needupdate(repo, state):
|
|
|
merge.update(repo, originalwd, False, True, False)
|
|
|
|
|
|
# Strip from the first rebased revision
|
|
|
rebased = filter(lambda x: x >= 0 and x != target, state.values())
|
|
|
if rebased:
|
|
|
strippoints = [c.node() for c in repo.set('roots(%ld)', rebased)]
|
|
|
# no backup of rebased cset versions needed
|
|
|
repair.strip(repo.ui, repo, strippoints)
|
|
|
|
|
|
if activebookmark and activebookmark in repo._bookmarks:
|
|
|
bookmarks.activate(repo, activebookmark)
|
|
|
|
|
|
clearstatus(repo)
|
|
|
repo.ui.warn(_('rebase aborted\n'))
|
|
|
return 0
|
|
|
|
|
|
def buildstate(repo, dest, rebaseset, collapse):
|
|
|
'''Define which revisions are going to be rebased and where
|
|
|
|
|
|
repo: repo
|
|
|
dest: context
|
|
|
rebaseset: set of rev
|
|
|
'''
|
|
|
_setrebasesetvisibility(repo, rebaseset)
|
|
|
|
|
|
# This check isn't strictly necessary, since mq detects commits over an
|
|
|
# applied patch. But it prevents messing up the working directory when
|
|
|
# a partially completed rebase is blocked by mq.
|
|
|
if 'qtip' in repo.tags() and (dest.node() in
|
|
|
[s.node for s in repo.mq.applied]):
|
|
|
raise util.Abort(_('cannot rebase onto an applied mq patch'))
|
|
|
|
|
|
roots = list(repo.set('roots(%ld)', rebaseset))
|
|
|
if not roots:
|
|
|
raise util.Abort(_('no matching revisions'))
|
|
|
roots.sort()
|
|
|
state = {}
|
|
|
detachset = set()
|
|
|
for root in roots:
|
|
|
commonbase = root.ancestor(dest)
|
|
|
if commonbase == root:
|
|
|
raise util.Abort(_('source is ancestor of destination'))
|
|
|
if commonbase == dest:
|
|
|
samebranch = root.branch() == dest.branch()
|
|
|
if not collapse and samebranch and root in dest.children():
|
|
|
repo.ui.debug('source is a child of destination\n')
|
|
|
return None
|
|
|
|
|
|
repo.ui.debug('rebase onto %d starting from %s\n' % (dest, root))
|
|
|
state.update(dict.fromkeys(rebaseset, revtodo))
|
|
|
# Rebase tries to turn <dest> into a parent of <root> while
|
|
|
# preserving the number of parents of rebased changesets:
|
|
|
#
|
|
|
# - A changeset with a single parent will always be rebased as a
|
|
|
# changeset with a single parent.
|
|
|
#
|
|
|
# - A merge will be rebased as merge unless its parents are both
|
|
|
# ancestors of <dest> or are themselves in the rebased set and
|
|
|
# pruned while rebased.
|
|
|
#
|
|
|
# If one parent of <root> is an ancestor of <dest>, the rebased
|
|
|
# version of this parent will be <dest>. This is always true with
|
|
|
# --base option.
|
|
|
#
|
|
|
# Otherwise, we need to *replace* the original parents with
|
|
|
# <dest>. This "detaches" the rebased set from its former location
|
|
|
# and rebases it onto <dest>. Changes introduced by ancestors of
|
|
|
# <root> not common with <dest> (the detachset, marked as
|
|
|
# nullmerge) are "removed" from the rebased changesets.
|
|
|
#
|
|
|
# - If <root> has a single parent, set it to <dest>.
|
|
|
#
|
|
|
# - If <root> is a merge, we cannot decide which parent to
|
|
|
# replace, the rebase operation is not clearly defined.
|
|
|
#
|
|
|
# The table below sums up this behavior:
|
|
|
#
|
|
|
# +------------------+----------------------+-------------------------+
|
|
|
# | | one parent | merge |
|
|
|
# +------------------+----------------------+-------------------------+
|
|
|
# | parent in | new parent is <dest> | parents in ::<dest> are |
|
|
|
# | ::<dest> | | remapped to <dest> |
|
|
|
# +------------------+----------------------+-------------------------+
|
|
|
# | unrelated source | new parent is <dest> | ambiguous, abort |
|
|
|
# +------------------+----------------------+-------------------------+
|
|
|
#
|
|
|
# The actual abort is handled by `defineparents`
|
|
|
if len(root.parents()) <= 1:
|
|
|
# ancestors of <root> not ancestors of <dest>
|
|
|
detachset.update(repo.changelog.findmissingrevs([commonbase.rev()],
|
|
|
[root.rev()]))
|
|
|
for r in detachset:
|
|
|
if r not in state:
|
|
|
state[r] = nullmerge
|
|
|
if len(roots) > 1:
|
|
|
# If we have multiple roots, we may have "hole" in the rebase set.
|
|
|
# Rebase roots that descend from those "hole" should not be detached as
|
|
|
# other root are. We use the special `revignored` to inform rebase that
|
|
|
# the revision should be ignored but that `defineparents` should search
|
|
|
# a rebase destination that make sense regarding rebased topology.
|
|
|
rebasedomain = set(repo.revs('%ld::%ld', rebaseset, rebaseset))
|
|
|
for ignored in set(rebasedomain) - set(rebaseset):
|
|
|
state[ignored] = revignored
|
|
|
return repo['.'].rev(), dest.rev(), state
|
|
|
|
|
|
def clearrebased(ui, repo, state, skipped, collapsedas=None):
|
|
|
"""dispose of rebased revision at the end of the rebase
|
|
|
|
|
|
If `collapsedas` is not None, the rebase was a collapse whose result if the
|
|
|
`collapsedas` node."""
|
|
|
if obsolete.isenabled(repo, obsolete.createmarkersopt):
|
|
|
markers = []
|
|
|
for rev, newrev in sorted(state.items()):
|
|
|
if newrev >= 0:
|
|
|
if rev in skipped:
|
|
|
succs = ()
|
|
|
elif collapsedas is not None:
|
|
|
succs = (repo[collapsedas],)
|
|
|
else:
|
|
|
succs = (repo[newrev],)
|
|
|
markers.append((repo[rev], succs))
|
|
|
if markers:
|
|
|
obsolete.createmarkers(repo, markers)
|
|
|
else:
|
|
|
rebased = [rev for rev in state if state[rev] > nullmerge]
|
|
|
if rebased:
|
|
|
stripped = []
|
|
|
for root in repo.set('roots(%ld)', rebased):
|
|
|
if set(repo.changelog.descendants([root.rev()])) - set(state):
|
|
|
ui.warn(_("warning: new changesets detected "
|
|
|
"on source branch, not stripping\n"))
|
|
|
else:
|
|
|
stripped.append(root.node())
|
|
|
if stripped:
|
|
|
# backup the old csets by default
|
|
|
repair.strip(ui, repo, stripped, "all")
|
|
|
|
|
|
|
|
|
def pullrebase(orig, ui, repo, *args, **opts):
|
|
|
'Call rebase after pull if the latter has been invoked with --rebase'
|
|
|
if opts.get('rebase'):
|
|
|
wlock = lock = None
|
|
|
try:
|
|
|
wlock = repo.wlock()
|
|
|
lock = repo.lock()
|
|
|
if opts.get('update'):
|
|
|
del opts['update']
|
|
|
ui.debug('--update and --rebase are not compatible, ignoring '
|
|
|
'the update flag\n')
|
|
|
|
|
|
movemarkfrom = repo['.'].node()
|
|
|
revsprepull = len(repo)
|
|
|
origpostincoming = commands.postincoming
|
|
|
def _dummy(*args, **kwargs):
|
|
|
pass
|
|
|
commands.postincoming = _dummy
|
|
|
try:
|
|
|
orig(ui, repo, *args, **opts)
|
|
|
finally:
|
|
|
commands.postincoming = origpostincoming
|
|
|
revspostpull = len(repo)
|
|
|
if revspostpull > revsprepull:
|
|
|
# --rev option from pull conflict with rebase own --rev
|
|
|
# dropping it
|
|
|
if 'rev' in opts:
|
|
|
del opts['rev']
|
|
|
# positional argument from pull conflicts with rebase's own
|
|
|
# --source.
|
|
|
if 'source' in opts:
|
|
|
del opts['source']
|
|
|
rebase(ui, repo, **opts)
|
|
|
branch = repo[None].branch()
|
|
|
dest = repo[branch].rev()
|
|
|
if dest != repo['.'].rev():
|
|
|
# there was nothing to rebase we force an update
|
|
|
hg.update(repo, dest)
|
|
|
if bookmarks.update(repo, [movemarkfrom], repo['.'].node()):
|
|
|
ui.status(_("updating bookmark %s\n")
|
|
|
% repo._activebookmark)
|
|
|
finally:
|
|
|
release(lock, wlock)
|
|
|
else:
|
|
|
if opts.get('tool'):
|
|
|
raise util.Abort(_('--tool can only be used with --rebase'))
|
|
|
orig(ui, repo, *args, **opts)
|
|
|
|
|
|
def _setrebasesetvisibility(repo, revs):
|
|
|
"""store the currently rebased set on the repo object
|
|
|
|
|
|
This is used by another function to prevent rebased revision to because
|
|
|
hidden (see issue4505)"""
|
|
|
repo = repo.unfiltered()
|
|
|
revs = set(revs)
|
|
|
repo._rebaseset = revs
|
|
|
# invalidate cache if visibility changes
|
|
|
hiddens = repo.filteredrevcache.get('visible', set())
|
|
|
if revs & hiddens:
|
|
|
repo.invalidatevolatilesets()
|
|
|
|
|
|
def _clearrebasesetvisibiliy(repo):
|
|
|
"""remove rebaseset data from the repo"""
|
|
|
repo = repo.unfiltered()
|
|
|
if '_rebaseset' in vars(repo):
|
|
|
del repo._rebaseset
|
|
|
|
|
|
def _rebasedvisible(orig, repo):
|
|
|
"""ensure rebased revs stay visible (see issue4505)"""
|
|
|
blockers = orig(repo)
|
|
|
blockers.update(getattr(repo, '_rebaseset', ()))
|
|
|
return blockers
|
|
|
|
|
|
def summaryhook(ui, repo):
|
|
|
if not os.path.exists(repo.join('rebasestate')):
|
|
|
return
|
|
|
try:
|
|
|
state = restorestatus(repo)[2]
|
|
|
except error.RepoLookupError:
|
|
|
# i18n: column positioning for "hg summary"
|
|
|
msg = _('rebase: (use "hg rebase --abort" to clear broken state)\n')
|
|
|
ui.write(msg)
|
|
|
return
|
|
|
numrebased = len([i for i in state.itervalues() if i >= 0])
|
|
|
# i18n: column positioning for "hg summary"
|
|
|
ui.write(_('rebase: %s, %s (rebase --continue)\n') %
|
|
|
(ui.label(_('%d rebased'), 'rebase.rebased') % numrebased,
|
|
|
ui.label(_('%d remaining'), 'rebase.remaining') %
|
|
|
(len(state) - numrebased)))
|
|
|
|
|
|
def uisetup(ui):
|
|
|
#Replace pull with a decorator to provide --rebase option
|
|
|
entry = extensions.wrapcommand(commands.table, 'pull', pullrebase)
|
|
|
entry[1].append(('', 'rebase', None,
|
|
|
_("rebase working directory to branch head")))
|
|
|
entry[1].append(('t', 'tool', '',
|
|
|
_("specify merge tool for rebase")))
|
|
|
cmdutil.summaryhooks.add('rebase', summaryhook)
|
|
|
cmdutil.unfinishedstates.append(
|
|
|
['rebasestate', False, False, _('rebase in progress'),
|
|
|
_("use 'hg rebase --continue' or 'hg rebase --abort'")])
|
|
|
# ensure rebased rev are not hidden
|
|
|
extensions.wrapfunction(repoview, '_getdynamicblockers', _rebasedvisible)
|
|
|
|
