rust-nodemap-docket: move check of nodemap requirement to caller
I think it's cleaner if `NodeMapDocket` doesn't know about the `Repo`
type. That makes it more easily reusable and testable. This patch
moves out one of the uses of `Repo` out of it.
Differential Revision: https://phab.mercurial-scm.org/D12544
# Dummy extension to define a namespace containing revision names
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)