Ignore Everything But The src Directory With Cargo Watch

I'm working on the rebuild of my site. My test output is going into a site directory next to the src directory. This causes an issue with cargo watch where it gets stuck in a loop every time I build the site. (It sees a change in the directory then reruns the process.)

Passing --ignore flags to cargo watch is one solution. It would be tedious. Instead, I put a .ignore file in the root of the project with this in it:

That ignores everything with the *, but allows the src directory via the !src line. Combined that lets me edit anything outside the src directory without triggering cargo watch.