Add pcmcia job.

Test the new option style.

svn path=/nixos/trunk/; revision=12742

system/options.nix

@@ -2914,4 +2914,7 @@ root        ALL=(ALL) SETENV: ALL
     };
   };
 
+  require = [
+    (import ../upstart-jobs/pcmcia.nix)
+  ];
 }

upstart-jobs/pcmcia.nix

@@ -0,0 +1,68 @@
+pkgs: config:
+
+###### interface
+let
+  inherit (pkgs.lib) mkOption
+    mergeEnableOption mergeListOption;
+
+  options = {
+    hardware = {
+      pcmcia = {
+        enable = mkOption {
+          default = false;
+          merge = mergeEnableOption;
+          description = ''
+            Enable this option to support PCMCIA card.
+          '';
+        };
+
+        firmware = mkOption {
+          default = [];
+          merge = mergeListOption;
+          description = ''
+            List of firmware used to handle specific PCMCIA card.
+          '';
+        };
+
+        config = mkOption {
+          default = null;
+          decription = ''
+            Path to the configuration file which map the memory, irq
+            and ports used by the PCMCIA hardware.
+          '';
+        };
+      };
+    };
+  };
+in
+
+###### implementation
+let
+  ifEnable = arg:
+    if config.hardware.pcmcia.enable then arg
+    else if builtins.isList arg then []
+    else if builtins.isAttrs arg then {}
+    else null;
+
+  pcmciaUtils = pkgs.pcmciaUtils.meta.function {
+    inherit (config.hardware.pcmcia) firmware config;
+  };
+in
+
+{
+  require = options;
+
+  boot = {
+    kernelModules = ifEnable [ "pcmcia" ];
+  };
+
+  services = {
+    udev = {
+      addUdevPkgs = ifEnable [ pcmciaUtils ];
+    };
+  };
+
+  environment = {
+    extraPackages = ifEnable [ pcmciaUtils ];
+  };
+}