GH Action failure on macOS only - X11 related?

[ddsjoberg]

Describe the bug
I have a build that is passing on all systems except macOS. The error occurs when trying to install the package gdtools (https://github.com/davidgohel/gdtools). The main page for the package lists additional software that needs to be available for this package, X11. The software requirement is additionally documented here: https://cran.r-project.org/bin/macosx/

To Reproduce
Here is a link to the most recent failed build log: https://github.com/ddsjoberg/gtsummary/pull/437/checks?check_run_id=574965508

Expected behavior
As this is only occurring on macOS with the package that needs X11, I assume this is the reason for the error.

Additional context
Apologies if this is not the correct space for reporting! Thank you!

[jimhester]

Generally you will need to install XQuartz in these cases, e.g. add the following to your workflow file.

      - name: Install XQuartz on macOS
        if: runner.os == 'macOS'
        run: brew cask install xquartz

[ddsjoberg]

Thank you @jimhester for your kind response! Adding that indeed solved the X11 error! Much appreciated! 🙌

[kabarigou]

For information, brew cask install xquartz returns an error:

Error: Unknown command: cask

This should be replaced by brew install xquartz --cask. So, one needs:

      - name: Install XQuartz on macOS
        if: runner.os == 'macOS'
        run: brew install xquartz --cask