remotenames: work around move of ABCs in collections
This starts warning in Python 3.7, and will break in 3.8. The import
is performed in a curious place because `import collections.abc`
explodes badly on Python 2.7, and `from collections import abc` flunks
our import checker.
Differential Revision: https://phab.mercurial-scm.org/D2847
# Dummy extension to define a namespace containing revision names
from __future__ import absolute_import
from mercurial import (
namespaces,
)
def reposetup(ui, repo):
names = {b'r%d' % rev: repo[rev].node() for rev in repo}
namemap = lambda r, name: names.get(name)
nodemap = lambda r, node: [b'r%d' % repo[node].rev()]
ns = namespaces.namespace(b'revnames', templatename=b'revname',
logname=b'revname',
listnames=lambda r: names.keys(),
namemap=namemap, nodemap=nodemap)
repo.names.addnamespace(ns)