make an installable derivation

untested as yet

.gitignore

@@ -0,0 +1,3 @@
+*~
+result*
+*.img

README.md

@@ -2,7 +2,7 @@
 
 **Broken, not ready for use**
 
-> *euphony*: _noun_ Harmonious aqrrangement of sounds in composition; a smooth and agreeable combination of articulate elements in any piece of writing.
+> *euphony*: _noun_ Harmonious arrangement of sounds in composition; a smooth and agreeable combination of articulate elements in any piece of writing.
 
 A mostly Fennel-based graphical environment tailored for Linux-based
 mobile devices. The principles we aspire to are
@@ -19,35 +19,12 @@ mobile devices. The principles we aspire to are
 As of 2022 these principles are more aspirational than actual. _This
 repo is basically in an advanced state of brokenness_
 
-## Building for a device
-
-To build an image, unpack [Mobile NixOS](https://github.com/NixOS/mobile-nixos/) in a sibling directory
-of this repo (so that `../mobile-nixos` addresses it) and then do
-something like this (substituing an appropriate device name for
-`motorola-potter`)
-
-    $ nix-build ../mobile-nixos/ -I mobile-nixos-configuration=./configuration.nix --argstr device motorola-potter -A build.default
-
-You are warmly encouraged to refer to the [Mobile Nixos
-docs](https://mobile.nixos.org/devices/) for how to use this image.
-
-Once you have your device up and running and you can ssh into it
-somehow (this may take further research, again I invite you to look at
-the Mobile Nixos site) then you should be able to use
-`nix-copy-closure` to update it without reinstalling.
-
-    $ phone=myphone.lan
-    $ nix-build ../mobile-nixos/ -I mobile-nixos-configuration=./configuration.nix --argstr device motorola-potter -A config.system.build.toplevel
-    $ nix-copy-closure --to root@${phone} --include-outputs \
-       ./result && ssh root@${phone} \
-       `readlink result`/bin/switch-to-configuration switch
-
-
 ## Running the shell/apps locally
 
-You may prefer to develop on a desktop device of some kind, especially
-if you're changing C code and have that edit/compile run cycle to go
-round. You can start the shell locally with
+Eufon is intendfed for phones, but you may prefer to develop on a
+desktop device of some kind, especially if you're changing C code and
+have that edit/compile run cycle to go round. You can start the shell
+locally with
 
      $ nix-shell --run "kiwmi -c init.lua"
 
@@ -58,11 +35,31 @@ for the Lua interpreter itself, but it doesn't do the same for kiwmi.
 
 ## Connecting to the repl
 
-If you are using the example rc.fnl, it opens a Unix socket that you
-can connect to and interact with a Fennel REPL. I use
-[socat](http://www.dest-unreach.org/socat/) for this purpose:
+If you are using the example rc.fnl, it opens a Unix socket to which
+you can connect to interact with a Fennel REPL. The `eufonctl`
+script is a wrapper around [socat](http://www.dest-unreach.org/socat/) 
+
+    $ eufonctl $WAYLAND_DISPLAY
+
+
+## Building for a device
+
+Eufon can be installed as a [Mobile NixOS](https://github.com/NixOS/mobile-nixos/) module, by adding
+`module.nix` to the `imports` in `your configuration.nix`. For example, on my development phone I
+have 
+
+```nix
+  imports = [
+    (import <mobile-nixos/lib/configuration.nix> {
+      device = "motorola-potter";
+    })
+    /home/dan/src/phoen/eufon/module.nix
+  ];
+```
+
+Instructions for using Mobile NixOS are currently outside the scope of
+this README.
 
-    $ socat - unix-connect:${XDG_RUNTIME_DIR}/kiwmi-repl.wayland-1.socket
 
 
 # TODO

bin/eufon.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+kiwmi -V -V -c init.lua

default.nix

@@ -11,6 +11,9 @@
 , gtk-layer-shell
 , lua5_3
 , socat
+, cpio
+
+, makeWrapper
 } :
 let
   lua = lua5_3;
@@ -63,11 +66,21 @@ stdenv.mkDerivation {
     gtk3
     webkitgtk
   ];
+  nativeBuildInputs = [ cpio makeWrapper ];
 
   installPhase = ''
+    export LUA_PATH="`lua -e 'print(package.path)'`"
+    export LUA_CPATH="`lua -e 'print(package.cpath)'`"
     mkdir -p $out/bin
-    substitute bin/eufon.sh $out/bin/eufon \
+    find . -name kiwmi -prune -o -type l -prune -o -print0 | cpio -0 -v --pass-through $out
+    substitute bin/eufonctl.sh $out/bin/eufonctl \
       --replace SOCAT=socat SOCAT=${socat}/bin/socat
+    makeWrapper ${kiwmi}/bin/kiwmi $out/bin/eufon \
+      --set LUA_PATH ".;$out/?.fnl;$LUA_PATH" \
+      --set LUA_CPATH ".;$out/?.so;$LUA_CPATH" \
+      --prefix PATH : ${kiwmi}/bin \
+      --add-flags "-c $out/init.lua"
+
     chmod +x $out/bin/eufon
   '';
 

module.nix

@@ -1,4 +1,5 @@
 { config, lib, pkgs, ... }:
+let eufon = pkgs.callPckage ./default.nix; in
 {
   systemd.services."eufon" = {
     wants = [
@@ -19,6 +20,7 @@
       "systemd-udev-settle.service"
     ];
     conflicts = [
+      "getty@tty1.service"      # not sure if needed
       "getty@tty2.service"
       "plymouth-quit.service"
     ];
@@ -27,11 +29,11 @@
       let run-eufon = pkgs.writeScript "run-eufon" ''
           #!${pkgs.bash}/bin/bash
           source ${config.system.build.setEnvironment}
-          ${pkgs.dbus}/bin/dbus-run-session /home/dan/src/eufon/run.sh
+          ${pkgs.dbus}/bin/dbus-run-session ${eufon}/bin/eufon
           systemd-cat echo "dbus-run-session $?"
         '';
       in {
-        WorkingDirectory = "/home/dan/src/eufon";
+        WorkingDirectory = "${eufon}";
         TTYPath = "/dev/tty2";
         TTYReset = "yes";
         TTYVHangup = "yes";
@@ -52,7 +54,13 @@
   environment.systemPackages = with pkgs; [
     git
   ];
-  networking.networkmanager.enable = true;
+
+  boot.postBootCommands = lib.mkOrder (-1) ''
+    brightness=4000
+    echo "Setting brightness to $brightness"
+    echo $brightness > /sys/class/backlight/wled/brightness
+  '';
+
   services.logind.extraConfig = ''
     HandlePowerKey=ignore
   '';