gnu: Add julia-requires.

* gnu/packages/julia-xyz.scm (julia-requires-0.5.2): New variable.

gnu/packages/julia-xyz.scm

@@ -968,3 +968,26 @@ Julia")
     (description "HTML Domain Specific Language for Julia, inspired by
 Clojure's Hiccup DSL.")
     (license license:expat)))
+
+(define-public julia-requires
+  (package
+    (name "julia-requires")
+    (version "0.5.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/MikeInnes/Requires.jl")
+             (commit "b2319cd875118c8da8ca099bcd733246ede13628")))
+       (file-name "Requires")
+       (sha256
+        (base32 "00ksdsdgn8pdr9v7263pdmnqmp14pmn6qpf0bvi8n0g59f2nibi9"))))
+    (propagated-inputs `(("julia-macrotools" ,julia-macrotools)))
+    (build-system julia-build-system)
+    (home-page "https://github.com/MikeInnes/Requires.jl")
+    (synopsis "Lazy code loading for Julia")
+    (description "Requires is a Julia package that will magically make loading
+packages faster, maybe.  It supports specifying glue code in packages which
+will load automatically when a another package is loaded, so that explicit
+dependencies (and long load times) can be avoided.")
+    (license license:expat)))