1 files changed, 51 insertions, 0 deletions
diff --git a/nixos/modules/system/boot/loader/init-script/init-script.nix b/nixos/modules/system/boot/loader/init-script/init-script.nix
new file mode 100644
index 00000000000..374d9524ff1
--- /dev/null
+++ b/nixos/modules/system/boot/loader/init-script/init-script.nix
@@ -0,0 +1,51 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  initScriptBuilder = pkgs.substituteAll {
+    src = ./init-script-builder.sh;
+    isExecutable = true;
+    inherit (pkgs) bash;
+    path = [pkgs.coreutils pkgs.gnused pkgs.gnugrep];
+  };
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    boot.loader.initScript = {
+
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Some systems require a /sbin/init script which is started.
+          Or having it makes starting NixOS easier.
+          This applies to some kind of hosting services and user mode linux.
+
+          Additionally this script will create
+          /boot/init-other-configurations-contents.txt containing
+          contents of remaining configurations. You can copy paste them into
+          /sbin/init manually running a rescue system or such.
+        '';
+      };
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf config.boot.loader.initScript.enable {
+
+    system.build.installBootLoader = initScriptBuilder;
+
+  };
+
+}