customize prompt string of nix repl

[Freed-Wu]

Is your feature request related to a problem? Please describe.
Can nix repl has a PS1 like https://github.com/vim-airline/vim-airline or https://github.com/romkatv/powerlevel10k?

Describe the solution you'd like
~/.config/nix/nix.conf provide an option like bash's PS1, or a nix expr which will be calculated before output PS1

Priorities

I think it is not important because it will not effect the function and it just allow user to customize the prompt string to beautify and provide some information (like nix version, current working path or time)

Add 👍 to issues you find important.

[SDAChess]

Hello, I am interested in implementing this feature, can we discuss what and how you would want that? I'm thinking that a nix expression might not be a good idea since it is going into the nix.conf so a bash expression would make more sense. Any thoughts?

[Freed-Wu]

Both are OK. 😄