Edit: _discovery.py
import functools import operator import packaging.requirements # from coherent.build.discovery def extras_from_dep(dep): try: markers = packaging.requirements.Requirement(dep).marker._markers except AttributeError: markers = () return set( marker[2].value for marker in markers if isinstance(marker, tuple) and marker[0].value == 'extra' ) def extras_from_deps(deps): """ >>> extras_from_deps(['requests']) set() >>> extras_from_deps(['pytest; extra == "test"']) {'test'} >>> sorted(extras_from_deps([ ... 'requests', ... 'pytest; extra == "test"', ... 'pytest-cov; extra == "test"', ... 'sphinx; extra=="doc"'])) ['doc', 'test'] """ return functools.reduce(operator.or_, map(extras_from_dep, deps), set())
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