Convert "printing", CUPS daemon

svn path=/nixos/branches/fix-style/; revision=14384

system/options.nix

@@ -479,18 +479,6 @@ in
 
     };
 
-    printing = {
-
-      enable = mkOption {
-        default = false;
-        description = "
-          Whether to enable printing support through the CUPS daemon.
-        ";
-      };
-
-    };
-
-
     udev = {
 
       addFirmware = mkOption {
@@ -1026,6 +1014,7 @@ in
     (import ../upstart-jobs/httpd.nix) # Apache httpd (probably this can be removed ?)
     (import ../upstart-jobs/apache-httpd) # Apache httpd (new style).
     (import ../upstart-jobs/vsftpd.nix)
+    (import ../upstart-jobs/cupsd.nix) # CUPS printing daemon
 
     # nix
     (import ../upstart-jobs/nix.nix) # nix options and daemon

upstart-jobs/cupsd.nix

@@ -1,4 +1,26 @@
-{config, pkgs, modprobe}:
+{pkgs, config, ...}:
+
+###### interface
+let
+  inherit (pkgs.lib) mkOption mkIf;
+
+  options = {
+    services = {
+      printing = {
+
+        enable = mkOption {
+          default = false;
+          description = "
+            Whether to enable printing support through the CUPS daemon.
+          ";
+        };
+
+      };
+    };
+  };
+in
+
+###### implementation
 
 let
 
@@ -7,6 +29,8 @@ let
 
   inherit (pkgs) cups;
 
+  modprobe = config.system.sbin.modprobe;
+
 
   # Here we can enable additional backends, filters, etc. that are not
   # part of CUPS itself, e.g. the SMB backend is part of Samba.  Since
@@ -101,7 +125,14 @@ let
 
 in
 
-{
+
+mkIf config.services.pulseaudio.enable {
+  require = [
+    options
+  ];
+
+  services = {
+    extraJobs = [{
       name = "cupsd";
 
       extraPath = [cups];
@@ -133,5 +164,6 @@ in
 
         respawn ${cups}/sbin/cupsd -c ${cupsdConfig} -F
       '';
-  
+    }];
+  };
 }

upstart-jobs/default.nix

@@ -166,12 +166,6 @@ let
       inherit (pkgs) glibc samba;
     })
 
-  # CUPS (printing) daemon.
-  ++ optional config.services.printing.enable
-    (import ../upstart-jobs/cupsd.nix {
-      inherit config pkgs modprobe;
-    })
-
   # X Font Server
   ++ optional config.services.xfs.enable
     (import ../upstart-jobs/xfs.nix {