storageutil: move metadata parsing and packing from revlog (API) Parsing and writing of revision text metadata is likely identical across storage backends. Let's move the code out of revlog so we don't need to import the revlog module in order to use it. Differential Revision: https://phab.mercurial-scm.org/D4754

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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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        changegroup,

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        error,

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        extensions

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    )

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def abort(orig, *args, **kwargs):

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    raise error.Abort(_('this is an exercise'))

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def uisetup(ui):

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    extensions.wrapfunction(changegroup, 'getbundler', abort)