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# ext-sidedata.py - small extension to test the sidedata logic
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#
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# Copyright 2019 Pierre-Yves David <pierre-yves.david@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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import hashlib
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import struct
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from mercurial import (
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extensions,
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node,
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revlog,
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)
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from mercurial.revlogutils import sidedata
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def wrapaddrevision(
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orig, self, text, transaction, link, p1, p2, *args, **kwargs
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):
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if kwargs.get('sidedata') is None:
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kwargs['sidedata'] = {}
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sd = kwargs['sidedata']
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## let's store some arbitrary data just for testing
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# text length
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sd[sidedata.SD_TEST1] = struct.pack('>I', len(text))
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# and sha2 hashes
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sha256 = hashlib.sha256(text).digest()
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sd[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
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return orig(self, text, transaction, link, p1, p2, *args, **kwargs)
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def wraprevision(orig, self, nodeorrev, *args, **kwargs):
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text = orig(self, nodeorrev, *args, **kwargs)
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if nodeorrev != node.nullrev and nodeorrev != node.nullid:
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sd = self.sidedata(nodeorrev)
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if len(text) != struct.unpack('>I', sd[sidedata.SD_TEST1])[0]:
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raise RuntimeError('text size mismatch')
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expected = sd[sidedata.SD_TEST2]
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got = hashlib.sha256(text).digest()
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if got != expected:
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raise RuntimeError('sha256 mismatch')
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return text
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def extsetup(ui):
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extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
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extensions.wrapfunction(revlog.revlog, 'revision', wraprevision)
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