comparison mercurial/revlogutils/__init__.py @ 48499:52034c42c09d

rank: add a "rank" value to the revlog-entry tuple

The rank of a revision is the size of sub-graph it defines as a head. In other
words, the rank of X is the size of `ancestors(X)` (X included).

This is a property that can help various algorithm and we intend to store it in
changelog-v2. We start with adding this new information to the "entry tuple",
with a default value. We will start to compute and persist the rank later.

Differential Revision: https://phab.mercurial-scm.org/D11936

48498:d5137c00ab17

from ..thirdparty import attr
from ..interfaces import repository

# See mercurial.revlogutils.constants for doc
COMP_MODE_INLINE = 2


def offset_type(offset, type):
    if (type & ~repository.REVISION_FLAGS_KNOWN) != 0:
        raise ValueError(b'unknown revlog index flags: %d' % type)

    data_uncompressed_length=-1,
    data_compression_mode=COMP_MODE_INLINE,
    sidedata_offset=0,
    sidedata_compressed_length=0,
    sidedata_compression_mode=COMP_MODE_INLINE,
):
    """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.

        node_id,
        sidedata_offset,
        sidedata_compressed_length,
        data_compression_mode,
        sidedata_compression_mode,
    )


@attr.s(slots=True, frozen=True)
class revisioninfo(object):

48499:52034c42c09d

from ..thirdparty 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)

    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.

        node_id,
        sidedata_offset,
        sidedata_compressed_length,
        data_compression_mode,
        sidedata_compression_mode,
        rank,
    )


@attr.s(slots=True, frozen=True)
class revisioninfo(object):