This action adds a problem matcher that catches Sphinx warnings to show them neatly inside your pull request like this:

The common usage of this will be like so:

    - uses: ammaraskar/sphinx-problem-matcher@master
    - name: "Build docs"
      run: |
        cd docs
        make html

That is, simply run this action before building your docs.

Note: this does not handle actually building your docs.