hgext/share.py
author Gregory Szorc <gregory.szorc@gmail.com>
Sun, 04 May 2014 21:33:14 -0700
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child 21772 5a4d1a6c605f
permissions -rw-r--r--
share: declare commands using decorator
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# Copyright 2006, 2007 Matt Mackall <mpm@selenic.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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'''share a common history between several working directories'''
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from mercurial.i18n import _
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from mercurial import cmdutil, hg, commands, util
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cmdtable = {}
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command = cmdutil.command(cmdtable)
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testedwith = 'internal'
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@command('share',
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    [('U', 'noupdate', None, _('do not create a working copy'))],
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    _('[-U] SOURCE [DEST]'))
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def share(ui, source, dest=None, noupdate=False):
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    """create a new shared repository
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    Initialize a new repository and working directory that shares its
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    history with another repository.
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    .. note::
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       using rollback or extensions that destroy/modify history (mq,
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       rebase, etc.) can cause considerable confusion with shared
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       clones. In particular, if two shared clones are both updated to
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       the same changeset, and one of them destroys that changeset
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       with rollback, the other clone will suddenly stop working: all
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       operations will fail with "abort: working directory has unknown
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       parent". The only known workaround is to use debugsetparents on
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       the broken clone to reset it to a changeset that still exists.
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    """
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    return hg.share(ui, source, dest, not noupdate)
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@command('unshare', [], '')
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def unshare(ui, repo):
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    """convert a shared repository to a normal one
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    Copy the store data to the repo and remove the sharedpath data.
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    """
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    if repo.sharedpath == repo.path:
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        raise util.Abort(_("this is not a shared repo"))
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    destlock = lock = None
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    lock = repo.lock()
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    try:
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        # we use locks here because if we race with commit, we
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        # can end up with extra data in the cloned revlogs that's
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        # not pointed to by changesets, thus causing verify to
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        # fail
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        destlock = hg.copystore(ui, repo, repo.path)
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        sharefile = repo.join('sharedpath')
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        util.rename(sharefile, sharefile + '.old')
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        repo.requirements.discard('sharedpath')
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        repo._writerequirements()
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    finally:
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        destlock and destlock.release()
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        lock and lock.release()
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    # update store, spath, sopener and sjoin of repo
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    repo.unfiltered().__init__(repo.baseui, repo.root)
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commands.norepo += " share"