move growpart out of nixos into cloud-init package

nixos/modules/virtualisation/amazon-grow-partition.nix

@@ -4,37 +4,13 @@
 
 { config, lib, pkgs, ... }:
 
-with lib;
-
-let
-
-  growpart = pkgs.stdenv.mkDerivation {
-    name = "growpart";
-    src = pkgs.fetchurl {
-      url = "https://launchpad.net/cloud-utils/trunk/0.27/+download/cloud-utils-0.27.tar.gz";
-      sha256 = "16shlmg36lidp614km41y6qk3xccil02f5n3r4wf6d1zr5n4v8vd";
-    };
-    patches = [ ./growpart-util-linux-2.26.patch ];
-    buildPhase = ''
-      cp bin/growpart $out
-      sed -i 's|awk|gawk|' $out
-      sed -i 's|sed|gnused|' $out
-    '';
-    dontInstall = true;
-    dontPatchShebangs = true;
-  };
-
-in
-
 {
-
   config = mkIf config.ec2.hvm {
-
     boot.initrd.extraUtilsCommands = ''
       copy_bin_and_libs ${pkgs.gawk}/bin/gawk
       copy_bin_and_libs ${pkgs.gnused}/bin/sed
       copy_bin_and_libs ${pkgs.utillinux}/sbin/sfdisk
-      cp -v ${growpart} $out/bin/growpart
+      cp -v ${pkgs.cloud-utils}/bin/growpart $out/bin/growpart
       ln -s sed $out/bin/gnused
     '';
 
@@ -44,7 +20,5 @@ in
         udevadm settle
       fi
     '';
-
   };
-
 }

pkgs/tools/misc/cloud-utils/default.nix

@@ -0,0 +1,18 @@
+{ stdenv, fetchurl }:
+
+stdenv.mkDerivation {
+  name = "cloud-utils-0.27";
+  src = fetchurl {
+    url = "https://launchpad.net/cloud-utils/trunk/0.27/+download/cloud-utils-0.27.tar.gz";
+    sha256 = "16shlmg36lidp614km41y6qk3xccil02f5n3r4wf6d1zr5n4v8vd";
+  };
+  patches = [ ./growpart-util-linux-2.26.patch ];
+  buildPhase = ''
+    mkdir -p $out/bin
+    cp bin/growpart $out/bin/growpart
+    sed -i 's|awk|gawk|' $out/bin/growpart
+    sed -i 's|sed|gnused|' $out/bin/growpart
+  '';
+  dontInstall = true;
+  dontPatchShebangs = true;
+}

pkgs/top-level/all-packages.nix

@@ -1111,6 +1111,8 @@ in
 
   cloogppl = callPackage ../development/libraries/cloog-ppl { };
 
+  cloud-utils = callPackage ../tools/misc/cloud-utils { };
+
   compass = callPackage ../development/tools/compass { };
 
   convmv = callPackage ../tools/misc/convmv { };