Git Prompt With Go

Some years ago, I wrote a custom git prompt with bash. I upgrade it a few times to fix bugs or add some features, but more and more I was discourage to rework it only because it was in Bash. My knowledge of Bash is slowly decreasing as now I make most of my scripts in Python or Javascript, and having to remember everytime how to do simple things like doing a loop or extracting values from a string demotivates me every time.