gnu: Add ruby-slop.

* gnu/packages/ruby.scm (ruby-slop): New variable.

gnu/packages/ruby.scm

@@ -620,3 +620,25 @@ run as a daemon and to be controlled by simple start/stop/restart commands.")
 and manipulate Git repositories by wrapping system calls to the git binary.")
     (home-page "https://github.com/schacon/ruby-git")
     (license license:expat)))
+
+(define-public ruby-slop
+  (package
+    (name "ruby-slop")
+    (version "4.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/leejarvis/slop/archive/v"
+                    version ".tar.gz"))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0cqs50a0b99kjd19xpln8jpnki07cjyp3l7wxbfr44ycasr6nznh"))))
+    (build-system ruby-build-system)
+    (native-inputs
+     `(("ruby-minitest" ,ruby-minitest)))
+    (synopsis "Ruby command line option parser")
+    (description "Slop provides a Ruby domain specific language for gathering
+options and parsing command line flags.")
+    (home-page "https://github.com/leejarvis/slop")
+    (license license:expat)))