gnu: Add julia-macrotools.

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

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/julia-xyz.scm

@@ -344,6 +344,27 @@ (define-public julia-json
 and printing JSON documents.")
     (license license:expat)))
 
+(define-public julia-macrotools
+  (package
+    (name "julia-macrotools")
+    (version "0.5.6")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/FluxML/MacroTools.jl")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0k4z2hyasd9cwxf4l61zk3w4ajs44k69wx6z1ghdn8f5p8xy217f"))))
+    (build-system julia-build-system)
+    (home-page "https://fluxml.ai/MacroTools.jl")
+    (synopsis "Tools for working with Julia code and expressions")
+    (description "This library provides tools for working with Julia code and
+expressions.  This includes a template-matching system and code-walking tools
+that let you do deep transformations of code.")
+    (license license:expat)))
+
 (define-public julia-mbedtls
   (package
     (name "julia-mbedtls")