branchcache: pass a "verify_node" attribut to __init__ instead of hasnode The hasnode callback cannot be inherited and is dropped on copy, which seems like a bad idea. Instead we pass the actual semantic as a parameter and let the internal logic deal with it.

[build-system]
requires = ["setuptools", "wheel"]

[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true