Hi, I was playing with rusty-rain when I decided that it was a good idea to make a custom FOSS effect. For this I made a change in “sibling” project ezemoji PR and with a small local change in rusty-rain I got it. All icons are from Nerd Fonts, so if you know of some FOSS icon is missing let me know to add it in the PR, =).
You need to apply 2 patches one in rusty-rain and another in ezemoji. In the main post I linked a PR for the ezemoji patch, you need that branch as dependency. Also there, I pasted another patch to be used on rusty-rain that uses your modified, local version of ezemoji, and a extra flag to choose FOSS icons. I’ll update instructions on the PR.