Solve alleged twine warnings on pypi publishing (#1778)

* Solve twine warning

(venv) PS C:\...\pvlib-python> py -m twine check dist/*
Checking dist\pvlib-0.9.6.dev25+g763dd0a.d20230618-py3-none-any.whl: PASSED with warnings
WARNING  `long_description_content_type` missing. defaulting to `text/x-rst`.
Checking dist\pvlib-0.9.6.dev25+g763dd0a.d20230618.tar.gz: PASSED with warnings
WARNING  `long_description_content_type` missing. defaulting to `text/x-rst`.

* Add metadata verification to publish.yml

* Add twine to build tools

* code review

Co-Authored-By: Kevin Anderson <[email protected]>

---------

Co-authored-by: Kevin Anderson <[email protected]>

Author: echedey-ls

.github/workflows/publish.yml

@@ -28,14 +28,18 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install build
+        python -m pip install twine
 
     - name: Build packages
       run: python -m build
 
+    - name: Check metadata verification
+      run: python -m twine check --strict dist/*
+
     # only publish distribution to PyPI for tagged commits
     - name: Publish distribution to PyPI
       if: startsWith(github.ref, 'refs/tags/v')
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
-        password: ${{ secrets.pypi_password }}
+        password: ${{ secrets.pypi_password }}

setup.py

@@ -27,6 +27,7 @@
 
 Source code: https://github.com/pvlib/pvlib-python
 """
+LONG_DESCRIPTION_CONTENT_TYPE = "text/x-rst"
 
 DISTNAME = 'pvlib'
 LICENSE = 'BSD 3-Clause'
@@ -119,6 +120,7 @@
       ext_modules=extensions,
       description=DESCRIPTION,
       long_description=LONG_DESCRIPTION,
+      long_description_content_type=LONG_DESCRIPTION_CONTENT_TYPE,
       author=AUTHOR,
       maintainer_email=MAINTAINER_EMAIL,
       license=LICENSE,