Add nonfree installer image

Use the following command to write this image to disk:

    dd if=$(guix system image -t efi-raw tw/system/nonfree-installer.scm) \
       of=/dev/sdX bs=64k oflag=sync status=progress

1 files changed, 36 insertions, 0 deletions

diff --git a/tw/system/nonfree-installer.scm b/tw/system/nonfree-installer.scm
new file mode 100644
index 00000000..bc363e95
--- /dev/null
+++ b/tw/system/nonfree-installer.scm
@@ -0,0 +1,36 @@
+(define-module (tw system nonfree-installer)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages linux)
+  #:use-module (gnu packages package-management)
+  #:use-module (gnu services)
+  #:use-module (gnu services ssh)
+  #:use-module (gnu system)
+  #:use-module ((guix gexp) #:select (local-file))
+  #:use-module ((nongnu system install)
+                #:select (installation-os-nonfree))
+  #:use-module ((srfi srfi-26) #:select (cut)))
+
+(operating-system
+  (inherit installation-os-nonfree)
+  (packages
+   (cons* efibootmgr htop guix
+          (operating-system-packages installation-os-nonfree)))
+  (services
+   (cons*
+    ;; Add an SSH server to facilitate remote installs.
+    (service openssh-service-type
+      (openssh-configuration
+       (port-number 22)
+       (%auto-start? #t)
+       (permit-root-login #t)
+       ;; The root account is passwordless, so make sure
+       ;; a password is set before allowing logins.
+       (allow-empty-passwords? #f)
+       (password-authentication? #f)
+       (authorized-keys
+        `(("root" ,(local-file "files/timo.pub"))))))
+    ;; Make sure to remove the SSH service from the base services,
+    ;; so we can override it fully.
+    (filter
+     (compose not (cut eq? openssh-service-type <>) service-kind)
+     ((@@ (gnu system install) %installation-services))))))