Adds back kernel-initrd (for qemu)

modules/system-types.nix

@@ -12,6 +12,7 @@ in
 {
   imports = [
     ../systems/rootfs.nix
+    ./system-types/kernel-initrd.nix
   ];
 
   options.mobile = {

modules/system-types/kernel-initrd.nix

@@ -0,0 +1,56 @@
+{ config, pkgs, lib, ... }:
+
+let
+  device_config = config.mobile.device;
+  device_name = device_config.name;
+  hardware_config = config.mobile.hardware;
+  rootfs = config.system.build.rootfs;
+  enabled = config.mobile.system.type == "kernel-initrd";
+
+  kernel-initrd = pkgs.callPackage ../../systems/kernel-initrd.nix {
+    inherit device_config hardware_config;
+    initrd = config.system.build.initrd;
+  };
+
+  system = pkgs.linkFarm "${device_config.name}-build" [
+    {
+      name = "kernel-initrd";
+      path = "kernel-initrd";
+    }
+    {
+      name = "system";
+      path = rootfs;
+    }
+  ];
+in
+  {
+    config = lib.mkMerge [
+      { mobile.system.types = [ "kernel-initrd" ]; }
+
+      (lib.mkIf enabled {
+        system.build = {
+          inherit system;
+          mobile-installer = system;
+          vm = pkgs.writeScript "run-vm-${device_name}" ''
+            #!${pkgs.runtimeShell}
+            PS4=" $ "
+            set -eux
+
+            cp -f ${rootfs}/*.img fs.img
+            chmod +rw fs.img
+
+            qemu-system-x86_64 \
+              -enable-kvm \
+              -kernel "${kernel-initrd}/kernel" \
+              -initrd "${kernel-initrd}/initrd" \
+              -append "$(cat "${kernel-initrd}/cmdline.txt")" \
+              -m      "$(cat "${kernel-initrd}/ram.txt")M" \
+              -serial "stdio" \
+              -drive  "file=fs.img,format=raw" \
+              -device "e1000,netdev=net0" \
+              -netdev "user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::2323-:23,net=172.16.42.0/24,dhcpstart=172.16.42.1"
+          '';
+        };
+      })
+    ];
+  }