Fix error reporting on Requires-Python conflicts #9552
Merged
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Fix #9541.
Currently, when resolution fails, the error message only shows a
Requires-Python
line if there is any in the graph. However, theRequiresPythonRequirement
is not necessarily the actual cause to the failure.A check is added to make sure the
RequiresPythonRequirement
objects are actually not satisfying, and only report aRequires-Python
error if any is. Some extra logic is also added when there are more than one unsatisfyingRequiresPythonRequirement
objects, to show all of them instead of just the first one.