gnu: Add julia-revise.

* gnu/packages/julia-xyz.scm (julia-revise-2.2.1): New variable.

gnu/packages/julia-xyz.scm

@@ -1663,3 +1663,33 @@ including support for stepping debuggers.")
     (synopsis "Tools for manipulating Julia's lowered code")
     (description "This package performs operations on Julia's lowered AST.")
     (license license:expat)))
+
+(define-public julia-revise
+  (package
+    (name "julia-revise")
+    (version "2.2.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/timholy/Revise.jl")
+             (commit (string-append "v" version))))
+       (file-name "Revise")
+       (sha256
+        (base32 "1rs7d32iiv34x8zs08bn5a4bp11yy4q6hm0rsh3n85ga0rbk0xsr"))))
+    (propagated-inputs
+     `(("julia-codetracking" ,julia-codetracking)
+       ("julia-loweredcodeutils" ,julia-loweredcodeutils)
+       ("julia-juliainterpreter" ,julia-juliainterpreter)
+       ("julia-orderedcollections" ,julia-orderedcollections)))
+    (build-system julia-build-system)
+    (home-page "https://timholy.github.io/Revise.jl/stable/")
+    (synopsis "Automatically update function definitions in a running Julia
+session")
+    (description "@code{Revise.jl} allows you to modify code and use the changes
+without restarting Julia.  With Revise, you can be in the middle of a session
+and then update packages, switch git branches, and/or edit the source code in
+the editor of your choice; any changes will typically be incorporated into the
+very next command you issue from the REPL.  This can save you the overhead of
+restarting Julia, loading packages, and waiting for code to JIT-compile.")
+    (license license:expat)))