feat: musicpi

hosts/musicpi/default.nix

@@ -0,0 +1,55 @@
+{ config, inputs, pkgs, lib, ... }:
+{
+  imports = [
+    "${inputs.nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64.nix"
+    #    "${inputs.nixos-hardware}/raspberry-pi/4/default.nix"
+  ];
+  boot.supportedFilesystems = lib.mkForce [ "reiserfs" "vfat" "ext4" ]; # we dont need zfs here
+  documentation.enable = false;
+  documentation.nixos.enable = false;
+  boot = {
+    kernelPackages = lib.mkDefault pkgs.linuxPackages_rpi4;
+    initrd.availableKernelModules = [ "usbhid" "usb_storage" "vc4" ];
+
+    loader = {
+      grub.enable = lib.mkDefault false;
+      generic-extlinux-compatible.enable = lib.mkDefault true;
+    };
+  };
+
+  hardware.deviceTree.filter = "bcm2711-rpi-*.dtb";
+
+  # Required for the Wireless firmware
+  hardware.enableRedistributableFirmware = true;
+
+  nix = {
+    autoOptimiseStore = true;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
+    # Free up to 1GiB whenever there is less than 100MiB left.
+    extraOptions = ''
+      min-free = ${toString (100 * 1024 * 1024)}
+      max-free = ${toString (1024 * 1024 * 1024)}
+    '';
+  };
+
+  # Assuming this is installed on top of the disk image.
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+      options = [ "noatime" ];
+    };
+  };
+
+  ragon.services.ssh.enable = true;
+  ragon.services.agenix.enable = true;
+  ragon.hardware.hifiberry-dac.enable = true;
+  services.shairport-sync = {
+    enable = true;
+    arguments = "-o alsa";
+  };
+}