Work around the mising RECORD file with homebrew pip. #14556
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For the last week or so, all macOS CI builds have been failing because of an issue with a recent Homebrew update.
The packaged version of
pip25.0.1 installed by homebrew doesn't include aRECORDfile in the distribution metadata. As a result, any attempt to upgradepipfails, because pip can't uninstall itself.As a workaround to get CI unstuck, this writes a dummy RECORD file so that pip can be upgraded. This does leave a stray
pip-25.0.1.dist-infofolder after thepipupgrade... but at least CI can run.The Homebrew documented workaround is to specify
--force-reinstall; this doesn't work - again, because the existing version of pip can't be uninstalled.Deleting the existing pip version can't work either, because without pip, you can't install pip.