localrepo: load the share source .hg/hgrc also in share-safe mode (API)
The second part of the Share Safe Plan is to share source repo config also.
This patch adds logic to load the source repo .hg/hgrc if we are in share safe
mode. On unshare, we copy and prepend source config to current repo so that
config which was shared is persisted.
A test is added to show that now if we enable a hook on the source repo, that
also runs on the shared repositories.
API change as a new optional argument sharedvfs added to localrepo.loadhgrc()
Differential Revision: https://phab.mercurial-scm.org/D8656
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true