build-numpy: set UV environment variables

The NumPy build itself doesn't need any of the packages from our
registry, but when we use twine to publish the wheels, it tries to
install cffi from source and fails. Add the UV variables to the
environment so that the publish-to-gitlab action inherits them and uses
them when invoking twine with uvx.

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>

Author: threexc

.github/workflows/build-numpy.yml

@@ -23,6 +23,9 @@ permissions:
 env:
   # `inputs.version` is empty on pull_request events; default to 2.5.0 there.
   NUMPY_VERSION: ${{ inputs.version || '2.5.0' }}
+  UV_EXTRA_INDEX_URL: https://gitlab.com/api/v4/projects/riseproject%2Fpython%2Fwheel_builder/packages/pypi/simple
+  UV_INDEX_STRATEGY: unsafe-best-match
+  UV_ONLY_BINARY: ':all:'
 
 jobs:
   build_wheels: