I've used https://github.com/SimonKagstrom/kcov to great effect to collect coverage on mbland/go-script-bash and publish it to Coveralls.

The only wrinkle is that I clone and build the kcov repo fresh every time, since the Ubuntu package is a bit old. For this project and that one, I should look into finding a way to install an updated binary.