[PATCH 102/105] gnu: Add ghc-lens.

[Paul van der Walt <paul@denknerd.org>]

* gnu/packages/haskell.scm (ghc-lens): Add variable.
---
 gnu/packages/haskell.scm | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 1fbd992..2e83b6d 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -3519,6 +3519,59 @@ and (co)density (co)monads.")
 parts of the OpenGL state.")
     (license bsd-3)))
 
+(define-public ghc-lens
+  (package
+    (name "ghc-lens")
+    (version "4.13")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://hackage.haskell.org/package/lens/lens-"
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "0g4g0xksrb2m8wgsmraaq8qnk1sssb42kr65fc7clgyid6zyfmim"))))
+    (build-system haskell-build-system)
+    (arguments `(#:tests? #f)) ;; FIXME: test-framework unavailable
+    (propagated-inputs
+     `(("ghc-base-orphans" ,ghc-base-orphans)
+       ("ghc-bifunctors" ,ghc-bifunctors)
+       ("ghc-distributive" ,ghc-distributive)
+       ("ghc-exceptions" ,ghc-exceptions)
+       ("ghc-free" ,ghc-free)
+       ("ghc-kan-extensions" ,ghc-kan-extensions)
+       ("ghc-parallel" ,ghc-parallel)
+       ("ghc-reflection" ,ghc-reflection)
+       ("ghc-semigroupoids" ,ghc-semigroupoids)
+       ("ghc-vector" ,ghc-vector)))
+    (inputs
+     `(("ghc-comonad" ,ghc-comonad)
+       ("ghc-contravariant" ,ghc-contravariant)
+       ("ghc-hashable" ,ghc-hashable)
+       ("ghc-mtl" ,ghc-mtl)
+       ("ghc-profunctors" ,ghc-profunctors)
+       ("ghc-semigroups" ,ghc-semigroups)
+       ("ghc-tagged" ,ghc-tagged)
+       ("ghc-text" ,ghc-text)
+       ("ghc-transformers-compat" ,ghc-transformers-compat)
+       ("ghc-unordered-containers" ,ghc-unordered-containers)
+       ("ghc-void" ,ghc-void)
+       ("ghc-quickcheck" ,ghc-quickcheck)
+       ("ghc-hunit" ,ghc-hunit)
+       ("ghc-doctest" ,ghc-doctest)
+       ("ghc-generic-deriving" ,ghc-generic-deriving)
+       ("ghc-nats" ,ghc-nats)
+       ("ghc-simple-reflect" ,ghc-simple-reflect)
+       ("ghc-hlint" ,ghc-hlint)))
+    (home-page "http://github.com/ekmett/lens/")
+    (synopsis "Lenses, Folds and Traversals")
+    (description "The combinators in Control.Lens provide a highly generic
+toolbox for composing families of getters, folds, isomorphisms, traversals,
+setters and lenses and their indexed variants.")
+    (license bsd-3)))
+
 (define-public ghc-tagsoup
   (package
     (name "ghc-tagsoup")
-- 
2.6.1