nixid

Like ghcid -T but for Nix

nixid is a flake-parts module for running Nix expressions in a feedback loop, so you can iterate on them in a text editor rather than in nix repl.

Usage

In an empty directory, run:

nix flake init -t github:srid/nixid

Edit the generated flake.nix to make the "expr" option to be whatever Nix expression you are iterating on.

Then run nix run to start a feedback loop that evaluates the expression and prints the value whenever it changes.