From d05b910886d8e998661480414525b0fde860643e Mon Sep 17 00:00:00 2001
From: Julien Malka <julien.malka@me.com>
Date: Sat, 1 Jan 2022 19:16:42 +0100
Subject: [PATCH] Trying to add new machine

---
 flake.nix                 |  8 ++++++-
 lib/default.nix           |  4 ++--
 machines/lisa/default.nix |  1 +
 rpi.nix                   | 45 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 55 insertions(+), 3 deletions(-)
 create mode 100644 rpi.nix

diff --git a/flake.nix b/flake.nix
index b489496..f4e89d5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -31,6 +31,7 @@
   outputs = { self, home-manager, nixpkgs, unstable, sops-nix, neovim-nightly-overlay, nur, ... }@inputs:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; };
+      pkgsrpi = import nixpkgs { system = "aarch64-linux";};
       lib = nixpkgs.lib.extend (import ./lib inputs);
     in
     with lib;
@@ -42,10 +43,15 @@
         })
         (builtins.attrNames (builtins.readDir ./modules)));
 
-      nixosConfigurations = builtins.mapAttrs (name: value: (mkMachine name value self.nixosModules)) (importConfig ./machines);
+        nixosConfigurations = builtins.mapAttrs (name: value: (mkMachine {host=name; host-config=value; modules=self.nixosModules;})) (importConfig ./machines) //
+        {"lambda" = mkMachine { host = "lambda"; host-config = import ./rpi.nix; modules=self.nixosModules; system="aarch64-linux";};};
       packages."x86_64-linux" = {
         tinystatus = import ./packages/tinystatus { inherit pkgs; };
         mosh = pkgs.callPackage ./packages/mosh {};
       };
+      packages."aarch64-linux" = {
+        tinystatus = import ./packages/tinystatus { pkgs = pkgsrpi; };
+        mosh = pkgsrpi.callPackage ./packages/mosh {};
+      };
     };
 }
diff --git a/lib/default.nix b/lib/default.nix
index 8f0597d..0e79722 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -9,9 +9,9 @@ let
 in
 {
 
-  mkMachine = host: host-config: modules: nixpkgs.lib.nixosSystem {
+  mkMachine = {host, host-config, modules, system ? "x86_64-linux"}: nixpkgs.lib.nixosSystem {
     lib = final;
-    system = "x86_64-linux";
+    system = system;
     specialArgs = {
       inherit inputs;
     };
diff --git a/machines/lisa/default.nix b/machines/lisa/default.nix
index 7351de2..26bb2d4 100644
--- a/machines/lisa/default.nix
+++ b/machines/lisa/default.nix
@@ -33,6 +33,7 @@
   };
 
   nix.maxJobs = lib.mkDefault 4;
+  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
 
   services.fail2ban.enable = true;
 
diff --git a/rpi.nix b/rpi.nix
new file mode 100644
index 0000000..eef55be
--- /dev/null
+++ b/rpi.nix
@@ -0,0 +1,45 @@
+{ config, pkgs, lib, ... }:
+{
+  # NixOS wants to enable GRUB by default
+  boot.loader.grub.enable = false;
+
+  # if you have a Raspberry Pi 2 or 3, pick this:
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+
+  # A bunch of boot parameters needed for optimal runtime on RPi 3b+
+  boot.kernelParams = ["cma=256M"];
+  boot.loader.raspberryPi.enable = true;
+  boot.loader.raspberryPi.version = 3;
+  boot.loader.raspberryPi.uboot.enable = true;
+  boot.loader.raspberryPi.firmwareConfig = ''
+    gpu_mem=256
+  '';
+  environment.systemPackages = with pkgs; [
+    libraspberrypi
+    tinystatus
+  ];
+
+  # File systems configuration for using the installer's partition layout
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+  };
+
+  # Preserve space by sacrificing documentation and history
+  documentation.nixos.enable = false;
+  nix.gc.automatic = true;
+  nix.gc.options = "--delete-older-than 30d";
+  boot.cleanTmpDir = true;
+
+  # Configure basic SSH access
+  services.openssh.enable = true;
+#  services.openssh.permitRootLogin = "yes";
+
+  # Use 1GB of additional swap memory in order to not run out of memory
+  # when installing lots of things while running other things at the same time.
+  swapDevices = [ { device = "/swapfile"; size = 1024; } ];
+
+  luj.hmgr.julien = {};
+}