first commit, should have done this a day ago

.gitignore

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+/local

Makefile

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+DEVICE=root@biscuit.lan
+
+.PHONY: toplevel android-bootimg default update
+
+default:
+	nix-build -A outputs.$@ -o $@
+
+android-bootimg:
+	nix-build -A outputs.android.$@ -o $@
+
+toplevel:
+	nix-build -A outputs.$@ -o $@
+
+update: toplevel android-bootimg
+	nix-copy-closure --to $(DEVICE) -v --include-outputs ./toplevel
+	ssh $(DEVICE) "nix-env --profile /nix/var/nix/profiles/system --set `readlink toplevel`  && /nix/var/nix/profiles/system/bin/switch-to-configuration switch"
+	cat android-bootimg | ssh $(DEVICE) "cat >/boot/boot.img"

README

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+
+Config for my moto potter to turn it into a bike computer. We will
+need
+
+- working gps
+- bluetooth (ble) stuff
+- wayland "cage" compositor
+- an app
+- rsync service so that trails can be downloaded to a computer
+- ip connectivity with flight mode
+ - give it telent and dandroid as APs
+ - use rfkill aggressively to save battery
+ 
+
+Absent any reason I should not write the app in fennel I'm going to
+write the app in fennel. I want it to
+
+- display speed/cadence/time of day/power
+- show where I am on a map
+- record trail of where I've been (note: indoor counts too)
+
+we can use l"ove2d instead of dragging in that gtk stuff
+
+   SDL2
+
+   To run an SDL2 application on Wayland, set
+   SDL_VIDEODRIVER=wayland. 
+
+can we do bluetooth not through dbus? dbus seems to make it flakey
+
+
+
+cool extras
+===========
+
+adjust screen brightness (go dark when not moving)
+

configuration.nix

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+{ lib, config, pkgs, ... }:
+
+let
+  rpmsgexport = pkgs.stdenv.mkDerivation {
+    name = "rpmsgexport";
+    src = pkgs.fetchFromGitHub {
+      repo = "rpmsgexport";
+      owner = "andersson";
+      rev = "324d88d668f36c6a5e6a9c2003a050b8a5a3cd60";
+      hash = "sha256-k38gj+vtEE6/s+vALzW1jiuE3HdQqaGiICdAWndu6aU=";
+    };
+    makeFlags = ["prefix=${placeholder "out"}"];
+  };
+  secrets = import ./local/secrets.nix;
+in {
+  imports = [
+    (import ../mobile-nixos/lib/configuration.nix { device = "motorola-potter"; })
+  ];
+
+  config = {
+    mobile = {
+      adbd.enable = true;
+    };
+    system.stateVersion = "23.11";
+
+    hardware.firmware = [
+      (config.mobile.device.firmware.override {
+        modem = ./modem;
+      })
+    ];
+    networking = {
+      useDHCP = true;
+      hostName = "biscuit";
+      networkmanager = { enable = false; };
+      inherit (secrets) wireless;
+    };
+
+    services.openssh.enable = true;
+
+#    environment.systemPackages = [ qrtr tqftpserv ];
+    services.udev.extraRules = ''
+      # copied from https://github.com/andersson/rpmsgexport
+      ACTION=="add", SUBSYSTEM=="rpmsg", KERNEL=="rpmsg_ctrl[0-9]*", ATTRS{rpmsg_name}=="pronto", RUN+="${rpmsgexport}/bin/rpmsgexport /dev/$name APPS_RIVA_CTRL"
+      SUBSYSTEM=="rpmsg", KERNEL=="rpmsg_ctrl[0-9]*", ATTRS{rpmsg_name}=="?*", SYMLINK+="rpmsg/$attr{rpmsg_name}/ctrl"
+      SUBSYSTEM=="rpmsg", KERNEL=="rpmsg[0-9]*", ATTR{name}=="?*", ATTRS{rpmsg_name}=="?*", SYMLINK+="rpmsg/$attr{rpmsg_name}/$attr{name}"
+    '';
+
+    users.users.dan = {
+      isNormalUser = true;
+      uid = 1000;
+      extraGroups = [ "wheel" "libvirtd" "docker" "dialout" ];
+      openssh.authorizedKeys.keys = import ../telent-nixos-config/users/dan/authorized-keys.nix;
+    };
+
+    fileSystems."/boot" = {
+      device = "/dev/disk/by-partlabel/system";
+      fsType = "ext4";
+    };
+  };
+}

default.nix

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+let
+  pkgs = (import <nixpkgs>) {
+    crossSystem = "aarch64-linux";
+  };
+  nixos =
+    (pkgs.nixos ./configuration.nix);
+in {
+  inherit (nixos.config.system) toplevel;
+  inherit (nixos.config.mobile) outputs;
+}