I think the article starts out correct, but as soon as it recommends letting through `*.go` it becomes mistaken.

I'd say the correct approach is to include all your top level files (i.e. CMakeLists.txt, .gitignore, etc.) but also your top-level *directories*, i.e. `/renderer`, `/UI`, `/tools`, whatever.

Then, crucially, your build system must also prohibit in-source builds and require a dedicated build directory.

This way, it's presumed that everything in your source tree is pristine and correct, and can host a variety of file types depending on your needs (realistically, source trees can contain lots of things; data, json, images, text, etc.) while you also shouldn't have to worry about polluting it accidentally.