rekahsoft-gnu: Add ghc-shake

* rekahsoft-gnu/packages/haskell-apps.scm (ghc-shake): New variable

rekahsoft-gnu/packages/haskell-apps.scm

@@ -183,3 +183,54 @@ requirements of downstream users (e.g.  Debian).")
 paper <http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.48.973 \"Optimal
 Purely Functional Priority Queues\">, extended with a 'Foldable' interface.")
     (license license:bsd-3)))
+
+;; TODO: this package cannot go upstream until tests can be run correctly
+(define-public ghc-shake
+  (package
+    (name "ghc-shake")
+    (version "0.19.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (hackage-uri "shake" version))
+        (sha256
+          (base32 "0hnm3h1ni4jq73a7b7yxhbg9wm8mrjda5kmkpnmclynnpwvvi7bx"))))
+    (build-system haskell-build-system)
+    (inputs
+      (list ghc-extra
+            ghc-filepattern
+            ghc-hashable
+            ghc-heaps
+            ghc-js-dgtable
+            ghc-js-flot
+            ghc-js-jquery
+            ghc-primitive
+            ghc-random
+            ghc-unordered-containers
+            ghc-utf8-string
+            ghc-semigroups))
+    (native-inputs (list ghc-quickcheck))
+    ;; fixme: tests currently fail. Current guess: /bin/sh is used to run
+    ;; commands (in 'src/Development/Shake/Command.hs#L164') which is somehow
+    ;; related to the issue?
+    (arguments
+     `(#:tests? #f))
+    (home-page "https://shakebuild.com")
+    (synopsis
+      "Build system library, like Make, but more accurate dependencies.")
+    (description
+      "Shake is a Haskell library for writing build systems - designed as a replacement
+for @make@.  See \"Development.Shake\" for an introduction, including an example.
+The homepage contains links to a user manual, an academic paper and further
+information: <https://shakebuild.com> .  To use Shake the user writes a Haskell
+program that imports \"Development.Shake\", defines some build rules, and calls
+the 'Development.Shake.shakeArgs' function.  Thanks to do notation and infix
+operators, a simple Shake build system is not too dissimilar from a simple
+Makefile.  However, as build systems get more complex, Shake is able to take
+advantage of the excellent abstraction facilities offered by Haskell and easily
+support much larger projects.  The Shake library provides all the standard
+features available in other build systems, including automatic parallelism and
+minimal rebuilds.  Shake also provides more accurate dependency tracking,
+including seamless support for generated files, and dependencies on system
+information (e.g.  compiler version).")
+    (license license:bsd-3)))