gnu: Add r-codedepends.

* gnu/packages/cran.scm (r-codedepends): New variable.

gnu/packages/cran.scm

@@ -3946,3 +3946,30 @@ if no cluster is present or wished.  The package is also designed as connector
 to the cluster management tool @code{sfCluster}, but can also used without
 it.")
    (license license:gpl2+)))
+
+(define-public r-codedepends
+  (package
+    (name "r-codedepends")
+    (version "0.5-3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "CodeDepends" version))
+       (sha256
+        (base32
+         "03p82s0abca2jimzqvxdzykfzca7c7fhm5xsjxybcksr4gggr5sc"))))
+    (properties `((upstream-name . "CodeDepends")))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-codetools" ,r-codetools)
+       ("r-xml" ,r-xml)))
+    (home-page "http://cran.r-project.org/web/packages/CodeDepends")
+    (synopsis "Analysis of R code for reproducible research and code comprehension")
+    (description
+     "This package provides tools for analyzing R expressions or blocks of
+code and determining the dependencies between them.  It focuses on R scripts,
+but can be used on the bodies of functions.  There are many facilities
+including the ability to summarize or get a high-level view of code,
+determining dependencies between variables, code improvement suggestions.")
+    ;; Any version of the GPL
+    (license (list license:gpl2+ license:gpl3+))))