Commits on Jul 27, 2023

1. fix: Don't require default Python version for pip hubs …

   This fixes the issue where a sub-module was required to always have
   a pip.parse() call configured for the default Python version if they
   used any pip.parse() call. Such a requirement puts sub-modules in an
   impossible situation: If they don't have the default version, they'll
   get an error. If they register the default version, but also register
   a specific version, they'll potentially cause an error if a root module
   changes the default to match their specific version (becaues two
   pip.parse() calls for the same version are made).
   
   The requirement to have the default version registered for a pip hub was
   only present to satisfy the `whl_library_alias` repository rule, which
   needed a Ptyhon version to map `//conditions:default` to.
   
   To fix, the `whl_library_alias` rule's `default_version` arg is made
   optional. When None is passed, the `//condiitions:default` condition
   is replaced with a `no_match_error` setting. This prevents the pip hub
   from being used with the version-unaware rules, but that makes sense: no
   wheels were setup for that version, so it's not like there is something
   that can be used anyways.
   
   Fixes bazelbuild#1320

   

   rickeylev committed Jul 27, 2023
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