Mercurial > public > mercurial-scm > hg-stable
diff mercurial/pure/parsers.py @ 47075:0d8ff1f4ab0c
revlog: add a `entry_binary` method on index
The revlog index is already responsible for unpacking the binary entry, it would be
simpler to make it responsible for packing them. In practice the C version of
the index is already doing this internally.
We introduce a "entry_binary" method that return the binary version of an
existing revision. The method currently need to also take the revlog header to
deal with the "first revision" special case. We will introduce further refactor
in a later changeset to split that logic out.
Differential Revision: https://phab.mercurial-scm.org/D10508
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Thu, 08 Apr 2021 00:01:11 +0200 |
| parents | d55b71393907 |
| children | d57386e5c80e |
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--- a/mercurial/pure/parsers.py Thu Apr 15 12:08:34 2021 +0200 +++ b/mercurial/pure/parsers.py Thu Apr 08 00:01:11 2021 +0200 @@ -127,10 +127,24 @@ r = (offset_type(0, gettype(r[0])),) + r[1:] return r + def entry_binary(self, rev, header): + """return the raw binary string representing a revision""" + entry = self[rev] + p = revlog_constants.INDEX_ENTRY_V1.pack(*entry) + if rev == 0: + v_fmt = revlog_constants.INDEX_HEADER + v_bin = v_fmt.pack(header) + p = v_bin + p[v_fmt.size :] + return p + class IndexObject(BaseIndexObject): def __init__(self, data): - assert len(data) % self.entry_size == 0 + assert len(data) % self.entry_size == 0, ( + len(data), + self.entry_size, + len(data) % self.entry_size, + ) self._data = data self._lgt = len(data) // self.entry_size self._extra = [] @@ -272,6 +286,16 @@ msg = b"cannot rewrite entries outside of this transaction" raise KeyError(msg) + def entry_binary(self, rev, header): + """return the raw binary string representing a revision""" + entry = self[rev] + p = revlog_constants.INDEX_ENTRY_V2.pack(*entry) + if rev == 0: + v_fmt = revlog_constants.INDEX_HEADER + v_bin = v_fmt.pack(header) + p = v_bin + p[v_fmt.size :] + return p + class IndexObject2(Index2Mixin, IndexObject): pass