Normalize PyPI specs #13
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Both
condaand PyPI packages are case-insensitive. PyPI packages additionally disregard dashes and underscores: they are considered equivalent. However,condadoes distinguish those.As a result, when a user installs
a-packageanda_package,pipproduces the same result butcondamight not. This means that if the PyPI name is not on the mappings, we need to try some variants in addition to the original name (dashes as underscores, underscores as hashes).For the sake of simplicity, I'll assume there are no mixed dash-underscore packages on conda-forge.