|
|
# mercurial.revlogutils -- basic utilities for revlog
|
|
|
#
|
|
|
# Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from __future__ import annotations
|
|
|
|
|
|
import typing
|
|
|
|
|
|
from ..thirdparty import attr
|
|
|
|
|
|
# Force pytype to use the non-vendored package
|
|
|
if typing.TYPE_CHECKING:
|
|
|
# noinspection PyPackageRequirements
|
|
|
import attr
|
|
|
|
|
|
from ..interfaces import repository
|
|
|
|
|
|
# See mercurial.revlogutils.constants for doc
|
|
|
COMP_MODE_INLINE = 2
|
|
|
RANK_UNKNOWN = -1
|
|
|
|
|
|
|
|
|
def offset_type(offset, type):
|
|
|
if (type & ~repository.REVISION_FLAGS_KNOWN) != 0:
|
|
|
raise ValueError(b'unknown revlog index flags: %d' % type)
|
|
|
return int(int(offset) << 16 | type)
|
|
|
|
|
|
|
|
|
def entry(
|
|
|
data_offset,
|
|
|
data_compressed_length,
|
|
|
data_delta_base,
|
|
|
link_rev,
|
|
|
parent_rev_1,
|
|
|
parent_rev_2,
|
|
|
node_id,
|
|
|
flags=0,
|
|
|
data_uncompressed_length=-1,
|
|
|
data_compression_mode=COMP_MODE_INLINE,
|
|
|
sidedata_offset=0,
|
|
|
sidedata_compressed_length=0,
|
|
|
sidedata_compression_mode=COMP_MODE_INLINE,
|
|
|
rank=RANK_UNKNOWN,
|
|
|
):
|
|
|
"""Build one entry from symbolic name
|
|
|
|
|
|
This is useful to abstract the actual detail of how we build the entry
|
|
|
tuple for caller who don't care about it.
|
|
|
|
|
|
This should always be called using keyword arguments. Some arguments have
|
|
|
default value, this match the value used by index version that does not store such data.
|
|
|
"""
|
|
|
return (
|
|
|
offset_type(data_offset, flags),
|
|
|
data_compressed_length,
|
|
|
data_uncompressed_length,
|
|
|
data_delta_base,
|
|
|
link_rev,
|
|
|
parent_rev_1,
|
|
|
parent_rev_2,
|
|
|
node_id,
|
|
|
sidedata_offset,
|
|
|
sidedata_compressed_length,
|
|
|
data_compression_mode,
|
|
|
sidedata_compression_mode,
|
|
|
rank,
|
|
|
)
|
|
|
|
|
|
|
|
|
@attr.s(slots=True, frozen=True)
|
|
|
class revisioninfo:
|
|
|
"""Information about a revision that allows building its fulltext
|
|
|
node: expected hash of the revision
|
|
|
p1, p2: parent revs of the revision (as node)
|
|
|
btext: built text cache consisting of a one-element list
|
|
|
cachedelta: (baserev, uncompressed_delta, usage_mode) or None
|
|
|
flags: flags associated to the revision storage
|
|
|
|
|
|
One of btext[0] or cachedelta must be set.
|
|
|
"""
|
|
|
|
|
|
node = attr.ib()
|
|
|
p1 = attr.ib()
|
|
|
p2 = attr.ib()
|
|
|
btext = attr.ib()
|
|
|
textlen = attr.ib()
|
|
|
cachedelta = attr.ib()
|
|
|
flags = attr.ib()
|
|
|
|
