gnu: Add js-requirejs.

* gnu/packages/javascript.scm (js-requirejs): New variable.

gnu/packages/javascript.scm

@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 Arun Isaac <arunisaac@systemreboot.net>
-;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2017, 2019 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2017, 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2018 Nicolas Goaziou <mail@nicolasgoaziou.fr>
@@ -307,6 +307,28 @@ Javascript library, adding sorting, paging and filtering abilities to plain
 HTML tables with minimal effort.")
     (license license:expat)))
 
+(define-public js-requirejs
+  (package
+    (name "js-requirejs")
+    (version "2.3.6")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                     (url "https://github.com/requirejs/requirejs.git")
+                     (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0cvd5y2mb3h6yil3niqn3gjqrzixdsxcz4rvc2f0hg4kzp5y0w86"))))
+    (build-system minify-build-system)
+    (arguments `(#:javascript-files '("require.js")))
+    (home-page "https://github.com/requirejs/requirejs/")
+    (synopsis "File and module loader for JavaScript")
+    (description "RequireJS loads plain JavaScript files as well as more
+defined modules.  It is optimized for in-browser use, including in a Web
+Worker, but it can be used in other JavaScript environments.")
+    (license license:expat)))
+
 (define-public js-selectize
   (package
     (name "js-selectize")