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# mercurial.revlogutils -- basic utilities for revlog
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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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from ..thirdparty import attr
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from ..interfaces import repository
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# See mercurial.revlogutils.constants for doc
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COMP_MODE_INLINE = 2
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RANK_UNKNOWN = -1
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def offset_type(offset, type):
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if (type & ~repository.REVISION_FLAGS_KNOWN) != 0:
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raise ValueError(b'unknown revlog index flags: %d' % type)
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return int(int(offset) << 16 | type)
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def entry(
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data_offset,
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data_compressed_length,
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data_delta_base,
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link_rev,
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parent_rev_1,
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parent_rev_2,
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node_id,
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flags=0,
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data_uncompressed_length=-1,
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data_compression_mode=COMP_MODE_INLINE,
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sidedata_offset=0,
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sidedata_compressed_length=0,
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sidedata_compression_mode=COMP_MODE_INLINE,
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rank=RANK_UNKNOWN,
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):
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"""Build one entry from symbolic name
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This is useful to abstract the actual detail of how we build the entry
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tuple for caller who don't care about it.
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This should always be called using keyword arguments. Some arguments have
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default value, this match the value used by index version that does not store such data.
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"""
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return (
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offset_type(data_offset, flags),
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data_compressed_length,
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data_uncompressed_length,
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data_delta_base,
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link_rev,
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parent_rev_1,
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parent_rev_2,
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node_id,
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sidedata_offset,
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sidedata_compressed_length,
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data_compression_mode,
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sidedata_compression_mode,
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rank,
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)
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@attr.s(slots=True, frozen=True)
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class revisioninfo(object):
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"""Information about a revision that allows building its fulltext
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node: expected hash of the revision
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p1, p2: parent revs of the revision
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btext: built text cache consisting of a one-element list
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cachedelta: (baserev, uncompressed_delta) or None
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flags: flags associated to the revision storage
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One of btext[0] or cachedelta must be set.
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"""
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node = attr.ib()
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p1 = attr.ib()
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p2 = attr.ib()
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btext = attr.ib()
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textlen = attr.ib()
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cachedelta = attr.ib()
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flags = attr.ib()
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