extract "mount filesystem" to module

modules/mount/default.nix

@@ -0,0 +1,49 @@
+
+{ lib, pkgs, config, ...}:
+let
+  inherit (lib) mkOption types;
+  inherit (pkgs) liminix;
+  mkBoolOption = description : mkOption {
+    type = types.bool;
+    inherit description;
+    default = true;
+  };
+
+in {
+  options = {
+    system.service.mount = mkOption {
+      type = liminix.lib.types.serviceDefn;
+    };
+  };
+  config.system.service = {
+    mount = liminix.callService ./service.nix {
+      device = mkOption {
+        type = types.str;
+        example = "/dev/sda1";
+      };
+      mountpoint = mkOption {
+        type = types.str;
+        example = "/mnt/media";
+      };
+      options = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        example = ["noatime" "ro" "sync"];
+      };
+      fstype = mkOption {
+        type = types.str;
+        default = "auto";
+        example = "vfat";
+      };
+    };
+  };
+  config.programs.busybox  = {
+    applets = ["blkid" "findfs"];
+    options = {
+      FEATURE_BLKID_TYPE = "y";
+      FEATURE_MOUNT_FLAGS = "y";
+      FEATURE_MOUNT_LABEL = "y";
+      FEATURE_VOLUMEID_EXT = "y";
+    };
+  };
+}