hgext/git/gitutil.py
author Matt Harbison <matt_harbison@yahoo.com>
Fri, 27 Nov 2020 15:17:42 -0500
changeset 45964 a001e28ad5eb
parent 44496 ec54b3d2af0b
child 45965 c7c1efdfd4de
permissions -rw-r--r--
git: add the standard `testedwith` attribute Otherwise this shows up as an external extension. Differential Revision: https://phab.mercurial-scm.org/D9435

"""utilities to assist in working with pygit2"""
from __future__ import absolute_import

from mercurial.node import bin, hex, nullid

from mercurial import pycompat

pygit2_module = None


def get_pygit2():
    global pygit2_module
    if pygit2_module is None:
        try:
            import pygit2 as pygit2_module

            pygit2_module.InvalidSpecError
        except (ImportError, AttributeError):
            pass
    return pygit2_module


def togitnode(n):
    """Wrapper to convert a Mercurial binary node to a unicode hexlified node.

    pygit2 and sqlite both need nodes as strings, not bytes.
    """
    assert len(n) == 20
    return pycompat.sysstr(hex(n))


def fromgitnode(n):
    """Opposite of togitnode."""
    assert len(n) == 40
    if pycompat.ispy3:
        return bin(n.encode('ascii'))
    return bin(n)


nullgit = togitnode(nullid)