From fa538528043ee125caf8719540d9c2e7abc97391 Mon Sep 17 00:00:00 2001
From: Calvin Kim <ccychc@gmail.com>
Date: Sun, 8 Sep 2019 03:02:25 +0900
Subject: [PATCH] nixos/cmt: add cmt module Adds custom touchpad drivers for
 Chromebooks.

---
 nixos/modules/module-list.nix               |  1 +
 nixos/modules/services/x11/hardware/cmt.nix | 54 +++++++++++++++++++++
 pkgs/top-level/all-packages.nix             |  8 +++
 3 files changed, 63 insertions(+)
 create mode 100644 nixos/modules/services/x11/hardware/cmt.nix

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 5335ba3abd18..7060aadd90cc 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -842,6 +842,7 @@
   ./services/x11/hardware/multitouch.nix
   ./services/x11/hardware/synaptics.nix
   ./services/x11/hardware/wacom.nix
+  ./services/x11/hardware/cmt.nix
   ./services/x11/gdk-pixbuf.nix
   ./services/x11/redshift.nix
   ./services/x11/urxvtd.nix
diff --git a/nixos/modules/services/x11/hardware/cmt.nix b/nixos/modules/services/x11/hardware/cmt.nix
new file mode 100644
index 000000000000..95353e92098e
--- /dev/null
+++ b/nixos/modules/services/x11/hardware/cmt.nix
@@ -0,0 +1,54 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+cfg = config.services.xserver.cmt;
+etcPath = "X11/xorg.conf.d";
+
+in {
+
+  options = {
+
+    services.xserver.cmt = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Enable chrome multitouch input (cmt). Touchpad drivers that are configured for chromebooks.";
+      };
+      models = mkOption {
+        type = types.enum [ "atlas" "banjo" "candy" "caroline" "cave" "celes" "clapper" "cyan" "daisy" "elan" "elm" "enguarde" "eve" "expresso" "falco" "gandof" "glimmer" "gnawty" "heli" "kevin" "kip" "leon" "lulu" "orco" "pbody" "peppy" "pi" "pit" "puppy" "quawks" "rambi" "samus" "snappy" "spring" "squawks" "swanky" "winky" "wolf" "auron_paine" "auron_yuna" "daisy_skate" "nyan_big" "nyan_blaze" "veyron_jaq" "veyron_jerry" "veyron_mighty" "veyron_minnie" "veyron_speedy" ];
+        example = "banjo";
+        description = ''
+          Which models to enable cmt for. Enter the Code Name for your Chromebook.
+          Code Name can be found at <link xlink:href="https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices" />.
+        '';
+      };
+    }; #closes services
+  }; #closes options
+
+  config = mkIf cfg.enable {
+
+    services.xserver.modules = [ pkgs.xf86_input_cmt ];
+
+    environment.etc = {
+      "${etcPath}/40-touchpad-cmt.conf" = {
+        source = "${pkgs.chromium-xorg-conf}/40-touchpad-cmt.conf";
+      };
+      "${etcPath}/50-touchpad-cmt-${cfg.models}.conf" = {
+        source = "${pkgs.chromium-xorg-conf}/50-touchpad-cmt-${cfg.models}.conf";
+      };
+      "${etcPath}/60-touchpad-cmt-${cfg.models}.conf" = {
+        source = "${pkgs.chromium-xorg-conf}/60-touchpad-cmt-${cfg.models}.conf";
+      };
+    };
+
+    assertions = [
+      {
+        assertion = !config.services.xserver.libinput.enable;
+        message = "cmt and libinput are incompatible, you cannot enable both (in services.xserver).";
+      }
+    ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b3ea05b72d68..292d51cd3130 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9223,6 +9223,8 @@ in
 
   chromedriver = callPackage ../development/tools/selenium/chromedriver { gconf = gnome2.GConf; };
 
+  chromium-xorg-conf = callPackage ../os-specific/linux/chromium-xorg-conf { };
+
   chrpath = callPackage ../development/tools/misc/chrpath { };
 
   chruby = callPackage ../development/tools/misc/chruby { rubies = null; };
@@ -16435,6 +16437,8 @@ in
 
   wpa_supplicant_gui = libsForQt5.callPackage ../os-specific/linux/wpa_supplicant/gui.nix { };
 
+  xf86_input_cmt = callPackage ../os-specific/linux/xf86-input-cmt { };
+
   xf86_input_mtrack = callPackage ../os-specific/linux/xf86-input-mtrack { };
 
   xf86_input_multitouch = callPackage ../os-specific/linux/xf86-input-multitouch { };
@@ -16733,6 +16737,10 @@ in
 
   liberation-sans-narrow = callPackage ../data/fonts/liberation-sans-narrow { };
 
+  libevdevc = callPackage ../os-specific/linux/libevdevc { };
+
+  libgestures = callPackage ../os-specific/linux/libgestures { };
+
   liberastika = callPackage ../data/fonts/liberastika { };
 
   libertine = callPackage ../data/fonts/libertine { };