gnu: Add cran module.

* gnu/packages/cran.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu/packages/statistics.scm (r-colorspace): Move to cran.scm.

gnu/local.mk

@@ -99,6 +99,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/cpio.scm				\
   %D%/packages/cpp.scm 				\
   %D%/packages/cppi.scm				\
+  %D%/packages/cran.scm				\
   %D%/packages/cross-base.scm			\
   %D%/packages/crypto.scm			\
   %D%/packages/cryptsetup.scm			\

gnu/packages/cran.scm

@@ -0,0 +1,44 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015, 2016, 2017 Ricardo Wurmus <rekado@elephly.net>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages cran)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system r))
+
+(define-public r-colorspace
+  (package
+    (name "r-colorspace")
+    (version "1.3-2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "colorspace" version))
+       (sha256
+        (base32 "0d1ya7hx4y58n5ivwmdmq2zgh0g2sbv7ykh13n85c1355csd57yx"))))
+    (build-system r-build-system)
+    (home-page "http://cran.r-project.org/web/packages/colorspace")
+    (synopsis "Color space manipulation")
+    (description
+     "This package carries out a mapping between assorted color spaces
+including RGB, HSV, HLS, CIEXYZ, CIELUV, HCL (polar CIELUV), CIELAB and polar
+CIELAB.  Qualitative, sequential, and diverging color palettes based on HCL
+colors are provided.")
+    (license license:bsd-3)))

gnu/packages/statistics.scm

@@ -34,6 +34,7 @@
   #:use-module (guix build-system trivial)
   #:use-module (gnu packages)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages cran)
   #:use-module (gnu packages curl)
   #:use-module (gnu packages gcc)
   #:use-module (gnu packages gtk)
@@ -644,26 +645,6 @@ interactive data exploration and manipulation and optionally leverage
 caching.")
     (license license:gpl2)))
 
-(define-public r-colorspace
-  (package
-    (name "r-colorspace")
-    (version "1.3-2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (cran-uri "colorspace" version))
-       (sha256
-        (base32 "0d1ya7hx4y58n5ivwmdmq2zgh0g2sbv7ykh13n85c1355csd57yx"))))
-    (build-system r-build-system)
-    (home-page "http://cran.r-project.org/web/packages/colorspace")
-    (synopsis "Color space manipulation")
-    (description
-     "This package carries out a mapping between assorted color spaces
-including RGB, HSV, HLS, CIEXYZ, CIELUV, HCL (polar CIELUV), CIELAB and polar
-CIELAB.  Qualitative, sequential, and diverging color palettes based on HCL
-colors are provided.")
-    (license license:bsd-3)))
-
 (define-public r-dichromat
   (package
     (name "r-dichromat")