Subject: [bug#44174] [PATCH v2 11/15] gnu: Add ghc-wizards.

From: Carlo Holl <[email-masked]>
Date: Sat, 31 Oct 2020 19:02:32 -0700

* gnu/packages/haskell-xyz.scm (ghc-wizards): New variable.
---
 gnu/packages/haskell-xyz.scm | 48 ++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 19657fa88f..210df9775c 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -14767,6 +14767,54 @@ widths to the Char type.")
 Haskell value or function.")
     (license license:bsd-3)))
 
+(define-public ghc-wizards
+  (package
+    (name "ghc-wizards")
+    (version "1.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://hackage.haskell.org/package/wizards/wizards-"
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "1clvbd1ckhvy29qrbmpkn7bya7300fq6znnps23nn3nxyrxhsr85"))))
+    (build-system haskell-build-system)
+    (inputs
+     `(("ghc-control-monad-free"
+        ,ghc-control-monad-free)))
+    (arguments
+     `(#:cabal-revision
+       ("1"
+        "095qd17zrdhqmcvmslbyzfa5sh9glvvsnsvnlz31gzsmi8nnsgim")))
+    (home-page "http://hackage.haskell.org/package/wizards")
+    (synopsis "High level, generic library for interrogative user interfaces")
+    (description "@code{wizards} is a package designed for the quick
+and painless development of @emph{interrogative} programs, which revolve around
+a \"dialogue\" with the user, who is asked a series of questions in a
+sequence much like an installation wizard.
+
+Everything from interactive system scripts, to installation wizards, to full-blown
+shells can be implemented with the support of @code{wizards}.
+
+It is developed transparently on top of a free monad, which separates out the
+semantics of the program from any particular interface.  A variety of backends
+exist, including console-based @code{System.Console.Wizard.Haskeline} and
+@code{System.Console.Wizard.BasicIO}, and the pure @code{System.Console.Wizard.Pure}.
+It is also possible to write your own backends, or extend existing back-ends with
+new features.  While both built-in IO backends operate on a console, there is no
+reason why @code{wizards} cannot also be used for making GUI wizard interfaces.
+
+See the github page for examples on usage:
+
+@url{http://www.github.com/liamoc/wizards}
+
+For creating backends, the module @code{System.Console.Wizard.Internal} has a brief
+tutorial.")
+    (license license:bsd-3)))
+
 (define-public ghc-wl-pprint
   (package
     (name "ghc-wl-pprint")
-- 
2.28.0