nixos-lib/lib/debug.nix

{ lib, myLib }:
with lib;
rec {
  toPretty =
    depth: x:
    # Stolen from: https://github.com/teto/nixpkgs/blob/6f098631f6f06b93c17f49abdf677790e017778d/lib/debug.nix#L109C5-L117C30
    let
      snip =
        v:
        if isList v then
          noQuotes "[…]" v
        else if isAttrs v then
          noQuotes "{…}" v
        else
          v;
      noQuotes = str: v: {
        __pretty = const str;
        val = v;
      };
      modify =
        n: fn: v:
        if (n == 0) then
          fn v
        else if isList v then
          map (modify (n - 1) fn) v
        else if isAttrs v then
          mapAttrs (const (modify (n - 1) fn)) v
        else
          v;
    in
    lib.generators.toPretty { allowPrettyValues = true; } (modify depth snip x);

  traceValWithPrefix =
    prefix: value:
    #trace "traceValWithPrefix 'prefix': ${prefix}" value
    trace "${prefix}: ${toPretty 2 value}" value;
}