How would I know if AppVayer is parsing my yaml file?

[Mike Brockus via Digitalmars-d-learn]

If you never seen Meson before then pick up a camera and take a 
picture:
🤔 👉 https://mesonbuild.com/
Quick question.
I started integrating ci/cd best practices to my Meson projects 
and I was wondering how would I know if AppVayer is parsing my 
yaml file? I know I got a failed build because it was set to 
MSBuild by default. But after I set the value to script, how 
would I know it's doing its work and not just spinning its wheels.

https://github.com/squidfarts/d-example.git