1 files changed, 92 insertions, 80 deletions

diff --git a/system-profiles/nfsroot.nix b/system-profiles/nfsroot.nix
index 4323765b..1cd930d9 100644
--- a/system-profiles/nfsroot.nix
+++ b/system-profiles/nfsroot.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, lib, flake, flakeInputs, ... }:
+{ config, options, pkgs, lib, flake, flakeInputs, ... }:
 
 with lib;
 
@@ -14,99 +14,111 @@ in {
       storeDevice = mkOption {
         type = types.str;
         default = "nfsroot:nix-store";
+        description = "Nix store device";
       };
 
       registrationUrl = mkOption {
         type = types.str;
         default = "http://nfsroot/nix-registration";
+        description = "Url of nix store registrations";
       };
     };
 
     system.build = {
-      storeContents = mkOption {};
+      storeContents = mkOption {
+        description = "Contents of nix store";
+      };
     };
   };
 
-  config = {
-    # Don't build the GRUB menu builder script, since we don't need it
-    # here and it causes a cyclic dependency.
-    boot.loader.grub.enable = false;
-
-    # !!! Hack - attributes expected by other modules.
-    environment.systemPackages = [ pkgs.grub2_efi ]
-      ++ (if pkgs.stdenv.hostPlatform.system == "aarch64-linux"
-          then []
-          else [ pkgs.grub2 pkgs.syslinux ]);
-
-    # In stage 1, mount a tmpfs on top of /nix/store (the squashfs
-    # image) to make this a live CD.
-    fileSystems."/nix/.ro-store" = mkImageMediaOverride
-      { fsType = "nfs4";
-        device = cfg.storeDevice;
-        options = [ "ro" ];
-        neededForBoot = true;
-      };
+  config = foldr recursiveUpdate {} ([
+    {
+      # Don't build the GRUB menu builder script, since we don't need it
+      # here and it causes a cyclic dependency.
+      boot.loader.grub.enable = false;
+
+      # !!! Hack - attributes expected by other modules.
+      environment.systemPackages = [ pkgs.grub2_efi ]
+        ++ (if pkgs.stdenv.hostPlatform.system == "aarch64-linux"
+            then []
+            else [ pkgs.grub2 pkgs.syslinux ]);
+
+      # In stage 1, mount a tmpfs on top of /nix/store (the squashfs
+      # image) to make this a live CD.
+      fileSystems."/nix/.ro-store" = mkImageMediaOverride
+        { fsType = "nfs4";
+          device = cfg.storeDevice;
+          options = [ "ro" ];
+          neededForBoot = true;
+        };
+
+      fileSystems."/nix/.rw-store" = mkImageMediaOverride
+        { fsType = "tmpfs";
+          options = [ "mode=0755" ];
+          neededForBoot = true;
+        };
+
+      fileSystems."/nix/store" = mkImageMediaOverride
+        { fsType = "overlay";
+          device = "overlay";
+          options = [
+            "lowerdir=/nix/.ro-store"
+            "upperdir=/nix/.rw-store/store"
+            "workdir=/nix/.rw-store/work"
+          ];
+
+          depends = [
+            "/nix/.ro-store"
+            "/nix/.rw-store/store"
+            "/nix/.rw-store/work"
+          ];
+        };
+
+      nix.settings.use-sqlite-wal = false;
+
+      boot.initrd.availableKernelModules = [ "nfs" "nfsv4" "overlay" ];
+      boot.initrd.supportedFilesystems = [ "nfs" "nfsv4" "overlay" ];
+      services.rpcbind.enable = mkImageMediaOverride false;
+
+      boot.initrd.network.enable = true;
+      boot.initrd.network.flushBeforeStage2 = false; # otherwise nfs doesn't work
+      boot.initrd.postMountCommands = ''
+        mkdir -p /mnt-root/etc/
+        cp /etc/resolv.conf /mnt-root/etc/resolv.conf
+      '';
+      networking.useDHCP = true;
+      networking.resolvconf.enable = false;
+      networking.dhcpcd.persistent = true;
 
-    fileSystems."/nix/.rw-store" = mkImageMediaOverride
-      { fsType = "tmpfs";
-        options = [ "mode=0755" ];
-        neededForBoot = true;
-      };
 
-    fileSystems."/nix/store" = mkImageMediaOverride
-      { fsType = "overlay";
-        device = "overlay";
-        options = [
-          "lowerdir=/nix/.ro-store"
-          "upperdir=/nix/.rw-store/store"
-          "workdir=/nix/.rw-store/work"
-        ];
-
-        depends = [
-          "/nix/.ro-store"
-          "/nix/.rw-store/store"
-          "/nix/.rw-store/work"
-        ];
-      };
+      system.build.storeContents = [config.system.build.toplevel];
 
-    nix.settings.use-sqlite-wal = false;
-
-    boot.initrd.availableKernelModules = [ "nfs" "nfsv4" "overlay" ];
-    boot.initrd.supportedFilesystems = [ "nfs" "nfsv4" "overlay" ];
-    services.rpcbind.enable = mkImageMediaOverride false;
-
-    boot.initrd.network.enable = true;
-    boot.initrd.network.flushBeforeStage2 = false; # otherwise nfs doesn't work
-    boot.initrd.postMountCommands = ''
-      mkdir -p /mnt-root/etc/
-      cp /etc/resolv.conf /mnt-root/etc/resolv.conf
-    '';
-    networking.useDHCP = true;
-    networking.resolvconf.enable = false;
-    networking.dhcpcd.persistent = true;
-
-
-    system.build.storeContents = [config.system.build.toplevel];
-
-    system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" ''
-      #!ipxe
-      # Use the cmdline variable to allow the user to specify custom kernel params
-      # when chainloading this script from other iPXE scripts like netboot.xyz
-      kernel ${pkgs.stdenv.hostPlatform.linux-kernel.target} init=${config.system.build.toplevel}/init initrd=initrd ${toString config.boot.kernelParams} ''${cmdline}
-      initrd initrd
-      boot
-    '';
-
-    boot.postBootCommands =
-      ''
-        # After booting, register the contents of the Nix store on NFS
-        # in the Nix database in the tmpfs.
-        ${pkgs.curl}/bin/curl ${escapeShellArg cfg.registrationUrl} | ${config.nix.package.out}/bin/nix-store --load-db
-
-        # nixos-rebuild also requires a "system" profile and an
-        # /etc/NIXOS tag.
-        touch /etc/NIXOS
-        ${config.nix.package}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
+      system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" ''
+        #!ipxe
+        # Use the cmdline variable to allow the user to specify custom kernel params
+        # when chainloading this script from other iPXE scripts like netboot.xyz
+        kernel ${pkgs.stdenv.hostPlatform.linux-kernel.target} init=${config.system.build.toplevel}/init initrd=initrd ${toString config.boot.kernelParams} ''${cmdline}
+        initrd initrd
+        boot
       '';
-  };
+
+      boot.postBootCommands =
+        ''
+          # After booting, register the contents of the Nix store on NFS
+          # in the Nix database in the tmpfs.
+          ${pkgs.curl}/bin/curl ${escapeShellArg cfg.registrationUrl} | ${config.nix.package.out}/bin/nix-store --load-db
+
+          # nixos-rebuild also requires a "system" profile and an
+          # /etc/NIXOS tag.
+          touch /etc/NIXOS
+          ${config.nix.package}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
+        '';
+
+      boot.initrd.systemd.enable = false;
+    }
+  ] ++ (optional (options ? system.etc) {
+    system.etc.overlay.enable = false;
+  }) ++ (optional (options ? system.sysusers) {
+    systemd.sysusers.enable = false;
+  }));
 }