New disjoint method for provider #179
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This new method seems quite natrual, happy to take any bikeshedding suggestions. I have a hacky version of implementing it with pip and dep-logic: pypa/pip@main...notatallshaw:pip:speedy-resolve (For the real version I will need to more carefully consider when ExplicitRequirements and SpecifierRequirements are disjoint). But it already successfully speeds up various resolutions. |
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Fixes #171
This allows the provider to implement a method to determine the causes which are disjoint, this has a number of advantages:
backtrack_causesinget_preferenceornarrow_requirement_selectionthey will be the disjoint causes allowing the provider to not have to iterate through as many causes or re-implement figuring out disjoint causes on every different method callResolutionImpossibleerrors the disjoint causes will naturally be returnedIf the provider does not implement a
disjointmethod then there is no behavior change, so this PR should be completely backwards compatible.