gnu: Add ruby-regexp-property-values.

* gnu/packages/ruby.scm (ruby-regexp-property-values): New variable.

gnu/packages/ruby.scm

@@ -6557,6 +6557,37 @@ following: @code{[1, 2, 3, 4, 6, 8, 9, 10]} into @code{[1..4, 6..6, 8..10]}.")
     (home-page "https://github.com/janosch-x/range_compressor")
     (license license:expat)))
 
+(define-public ruby-regexp-property-values
+  (package
+    (name "ruby-regexp-property-values")
+    (version "1.0.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference              ;no test suite in distributed gem
+             (url "https://github.com/jaynetics/regexp_property_values.git")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "0l3fjmscg1wxn7kc6bl022cc6k5d91pwb7daq1b5w36kvsx52w1j"))))
+    (build-system ruby-build-system)
+    (arguments
+     '(#:test-target "default"))
+    (native-inputs
+     `(("ruby-character-set" ,ruby-character-set)
+       ("ruby-rake-compiler" ,ruby-rake-compiler)
+       ("ruby-range-compressor" ,ruby-range-compressor)
+       ("ruby-rspec" ,ruby-rspec)))
+    (synopsis "Inspect Ruby's regex engine property values")
+    (description "This small library lets you see which property values are
+supported by the regular expression engine of the Ruby version you are running
+and can directly read out their code point ranges.  In other words, it
+determines all supported values for @code{\\p{value}} expressions and what
+they match.")
+    (home-page "https://github.com/jaynetics/regexp_property_values")
+    (license license:expat)))
+
 (define-public ruby-rubocop
   (package
     (name "ruby-rubocop")