gnu: Add go-nullprogram-com-x-optparse.

* gnu/packages/golang-xyz.scm (go-nullprogram-com-x-optparse): New variable.

Change-Id: I52563130c2c305b68d7ed498995fad2cf8499994

gnu/packages/golang-xyz.scm

@@ -11960,6 +11960,33 @@ kubernetes-independent packages supplementing the
 defined in @url{https://editorconfig.org/,https://editorconfig.org/}.")
     (license license:bsd-3)))
 
+(define-public go-nullprogram-com-x-optparse
+  (package
+    (name "go-nullprogram-com-x-optparse")
+    (version "1.0.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/skeeto/optparse-go")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1yzpzlhmxdm8gd8ikh9c91qmshjp1jg49l0qsslmm432wk19zym9"))))
+    (build-system go-build-system)
+    (arguments
+     (list
+      #:import-path "nullprogram.com/x/optparse"))
+    (home-page "https://nullprogram.com/x/optparse/")
+    (synopsis "Traditional long option parser for Go")
+    (description
+     "Package optparse parses command line arguments very similarly to GNU
+@code{getopt_long()}.  It supports long options and optional arguments, but
+does not permute arguments.  It is intended as a replacement for Go's flag
+package.")
+    ;; License type does latterly says it' "UNLICENSE".
+    (license license:unlicense)))
+
 (define-public go-rsc-io-binaryregexp
   (package
     (name "go-rsc-io-binaryregexp")