gnu: Add go-github-com-k0kubun-go-ansi.

* gnu/packages/golang-xyz.scm (go-github-com-k0kubun-go-ansi): New variable.

Change-Id: I012a3b5c530f1fb7ee61e628fac216bdd966772c
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/golang-xyz.scm

@@ -1327,6 +1327,31 @@ Alphanum Algorithm} developed by Dave Koelle in Go.")
 defined output to the standard output.")
     (license license:expat)))
 
+(define-public go-github-com-k0kubun-go-ansi
+  (package
+    (name "go-github-com-k0kubun-go-ansi")
+    (version "0.0.0-20180517002512-3bf9e2903213")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/k0kubun/go-ansi")
+             (commit (go-version->git-ref version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "117afax4l268rbswf02icbgxncmd1pk2abkz7cv26iyszi8l26dq"))))
+    (build-system go-build-system)
+    (arguments
+     (list
+      #:import-path "github.com/k0kubun/go-ansi"))
+    (home-page "https://github.com/k0kubun/go-ansi")
+    (synopsis "Windows-portable ANSI escape sequence utility for Golang")
+    (description
+     "This library converts ANSI escape sequences to Windows API calls on
+Windows environment.  You can easily use this feature by replacing fmt with
+ansi.")
+    (license license:expat)))
+
 (define-public go-github-com-gabriel-vasile-mimetype
   (package
     (name "go-github-com-gabriel-vasile-mimetype")