From 5f9b2148b775d50027882d82e2a337864aa8882c Mon Sep 17 00:00:00 2001
From: Dustin Frisch <fooker@lab.sh>
Date: Thu, 24 Feb 2022 15:15:36 +0100
Subject: [PATCH] nixos/k40-whisperer: module init

---
 .../from_md/release-notes/rl-2205.section.xml |  9 +++++
 .../manual/release-notes/rl-2205.section.md   |  2 +
 nixos/modules/module-list.nix                 |  1 +
 nixos/modules/programs/k40-whisperer.nix      | 40 +++++++++++++++++++
 4 files changed, 52 insertions(+)
 create mode 100644 nixos/modules/programs/k40-whisperer.nix

diff --git a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
index a6c3fdd1ed2..645b4ac5574 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
@@ -145,6 +145,15 @@
           <link xlink:href="options.html#opt-services.maddy.enable">services.maddy</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://www.scorchworks.com/K40whisperer/k40whisperer.html">K40-Whisperer</link>,
+          a program to control cheap Chinese laser cutters. Available as
+          <link xlink:href="options.html#opt-programs.k4-whisperer.enable">programs.k40-whisperer.enable</link>.
+          Users must add themselves to the <literal>k40</literal> group
+          to be able to access the device.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <link xlink:href="https://github.com/mgumz/mtr-exporter">mtr-exporter</link>,
diff --git a/nixos/doc/manual/release-notes/rl-2205.section.md b/nixos/doc/manual/release-notes/rl-2205.section.md
index d55a45f8b2b..542fb24abbd 100644
--- a/nixos/doc/manual/release-notes/rl-2205.section.md
+++ b/nixos/doc/manual/release-notes/rl-2205.section.md
@@ -45,6 +45,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [maddy](https://maddy.email), a composable all-in-one mail server. Available as [services.maddy](options.html#opt-services.maddy.enable).
 
+- [K40-Whisperer](https://www.scorchworks.com/K40whisperer/k40whisperer.html), a program to control cheap Chinese laser cutters. Available as [programs.k40-whisperer.enable](options.html#opt-programs.k4-whisperer.enable). Users must add themselves to the `k40` group to be able to access the device.
+
 - [mtr-exporter](https://github.com/mgumz/mtr-exporter), a Prometheus exporter for mtr metrics. Available as [services.mtr-exporter](options.html#opt-services.mtr-exporter.enable).
 
 - [tetrd](https://tetrd.app), share your internet connection from your device to your PC and vice versa through a USB cable. Available at [services.tetrd](#opt-services.tetrd.enable).
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 351fcf7cdbb..28974c17ec7 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -167,6 +167,7 @@
   ./programs/iftop.nix
   ./programs/iotop.nix
   ./programs/java.nix
+  ./programs/k40-whisperer.nix
   ./programs/kdeconnect.nix
   ./programs/kbdlight.nix
   ./programs/less.nix
diff --git a/nixos/modules/programs/k40-whisperer.nix b/nixos/modules/programs/k40-whisperer.nix
new file mode 100644
index 00000000000..3163e45f57e
--- /dev/null
+++ b/nixos/modules/programs/k40-whisperer.nix
@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.k40-whisperer;
+  pkg = cfg.package.override {
+    udevGroup = cfg.group;
+  };
+in
+{
+  options.programs.k40-whisperer = {
+    enable = mkEnableOption "K40-Whisperer";
+
+    group = mkOption {
+      type = types.str;
+      description = ''
+        Group assigned to the device when connected.
+      '';
+      default = "k40";
+    };
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.k40-whisperer;
+      defaultText = literalExpression "pkgs.k40-whisperer";
+      example = literalExpression "pkgs.k40-whisperer";
+      description = ''
+        K40 Whisperer package to use.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.groups.${cfg.group} = {};
+
+    environment.systemPackages = [ pkg ];
+    services.udev.packages = [ pkg ];
+  };
+}