upgrade: speed up when we have only nodemap to downgrade
Similar to what we do on upgrade, if we have only persistent-nodemap to
downgrade we will just delete the nodemap files and update repository
requirements instead of processing all the revlogs.
After downgrade, we are left with unrequired docket and transaction files which
seems fine but can work on deleting them if someone feels we should.
Differential Revision: https://phab.mercurial-scm.org/D9992
"""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 pygit2_version():
mod = get_pygit2()
v = "N/A"
if mod:
try:
v = mod.__version__
except AttributeError:
pass
return b"(pygit2 %s)" % v.encode("utf-8")
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)