view mercurial/utils/hashutil.py @ 47169:a13f72b9ccfb

revlog: move index reading logic in a dedicated method

They are multiple motivation to do it:

* The logic is complicated enough to deserver its own method.

* We will need to reuse this once we put a docket in use.

* This split the actual reading from the processing of the read data better.

Differential Revision: https://phab.mercurial-scm.org/D10595

from __future__ import absolute_import

import hashlib

try:
    from ..thirdparty import sha1dc  # pytype: disable=import-error

    sha1 = sha1dc.sha1
except (ImportError, AttributeError):
    sha1 = hashlib.sha1