gnu: Add julia-measures.

* gnu/packages/julia-xyz.scm (julia-measures-0.3.0): New variable.

gnu/packages/julia-xyz.scm

@@ -1174,3 +1174,37 @@ which ignore NaN")
     (description "Implementations of basic math functions which return NaN
 instead of throwing a DomainError.")
     (license license:expat)))
+
+(define-public julia-measures
+  (package
+    (name "julia-measures")
+    (version "0.3.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/JuliaGraphics/Measures.jl")
+             (commit (string-append "v" version))))
+       (file-name "Measures")
+       (sha256
+        (base32 "020yf4a7wmm0jhkpzxgz4bif2l4l0zmrzagz0gc2hrvnz0kp9m3b"))))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'precompile 'fix-toml
+           (lambda* (#:key outputs source #:allow-other-keys)
+             (julia-create-package-toml
+              outputs source
+              "Measures"
+              "442fdcdd-2543-5da2-b0f3-8c86c306513e"
+              "0.3.0"
+              '())
+             #t)))))
+    (build-system julia-build-system)
+    (home-page "https://github.com/JuliaGraphics/Measures.jl")
+    (synopsis "Unified measure and coordinates types")
+    (description "This library generalizes and unifies the notion of measures
+used in @code{Compose}, @code{Compose3D}, and @code{Escher}.  It allows
+building up and representing expressions involving differing types of units
+that are then evaluated, resolving them into absolute units.")
+    (license license:expat)))