gnu: Add r-fail.

* gnu/packages/statistics.scm (r-fail): New variable.

gnu/packages/statistics.scm

@@ -1677,6 +1677,28 @@ (define-public r-bbmisc
 of R packages.")
     (license license:bsd-3)))
 
+(define-public r-fail
+  (package
+    (name "r-fail")
+    (version "1.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (cran-uri "fail" version))
+       (sha256
+        (base32
+         "0vfm6kmpmgsamda5p0sl771kbnsscan31l2chzssyw93kwmams7d"))))
+    (build-system r-build-system)
+    (propagated-inputs
+     `(("r-bbmisc" ,r-bbmisc)
+       ("r-checkmate" ,r-checkmate)))
+    (home-page "https://github.com/mllg/fail")
+    (synopsis "File abstraction interface layer (FAIL)")
+    (description
+     "This package provides a more comfortable interface to work with R data
+or source files in a key-value fashion.")
+    (license license:bsd-3)))
+
 (define-public r-brew
   (package
     (name "r-brew")