nimpretty: Add nimpretty (hercules-ci#174)

* nimpretty: Added nimpretty

* chore: executed ./example.sh

README.md

@@ -213,6 +213,7 @@ This repo contains a top-level `default.nix` that returns the library helper fun
 * muon
 * mypy
 * nickel
+* nimpretty
 * nixfmt
 * nixfmt-rfc-style
 * nixpkgs-fmt

examples/formatter-nimpretty.toml

@@ -0,0 +1,6 @@
+# Example generated by ../examples.sh
+[formatter.nimpretty]
+command = "nimpretty"
+excludes = []
+includes = ["*.nim"]
+options = []

programs/nimpretty.nix

@@ -0,0 +1,17 @@
+{ lib, pkgs, config, ... }:
+let
+  cfg = config.programs.nimpretty;
+in
+{
+  options.programs.nimpretty = {
+    enable = lib.mkEnableOption "nimpretty";
+    package = lib.mkPackageOption pkgs "nim" { };
+  };
+
+  config = lib.mkIf cfg.enable {
+    settings.formatter.nimpretty = {
+      command = "${cfg.package}/bin/nimpretty";
+      includes = [ "*.nim" ];
+    };
+  };
+}