gnu: Add ghc-happy@1.19.9

* gnu/packages/purescript.scm (ghc-happy-1.19.9): New file, New variable.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add purescript.scm.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/local.mk

@@ -21,7 +21,7 @@
 # Copyright © 2018 Stefan Stefanović <stefanx2ovic@gmail.com>
 # Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 # Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net>
-# Copyright © 2019 John Soo <jsoo1@asu.edu>
+# Copyright © 2019, 2020 John Soo <jsoo1@asu.edu>
 # Copyright © 2019 Jonathan Brielmaier <jonathan.brielmaier@web.de>
 # Copyright © 2019 Evan Straw <evan.straw99@gmail.com>
 # Copyright © 2019 Brett Gilio <brettg@gnu.org>
@@ -430,6 +430,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/pretty-print.scm			\
   %D%/packages/protobuf.scm			\
   %D%/packages/pure.scm				\
+  %D%/packages/purescript.scm			\
   %D%/packages/pv.scm				\
   %D%/packages/python.scm			\
   %D%/packages/python-check.scm			\

gnu/packages/purescript.scm

@@ -0,0 +1,44 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 John Soo <jsoo1@asu.edu>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages purescript)
+  #:use-module (gnu packages haskell-xyz)
+  #:use-module (gnu packages haskell-check)
+  #:use-module (gnu packages haskell-crypto)
+  #:use-module (gnu packages haskell-web)
+  #:use-module ((gnu packages python) #:select (python))
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix packages)
+  #:use-module (guix build-system haskell)
+  #:use-module ((guix licenses) #:prefix license:))
+
+(define ghc-happy-1.19.9
+  (package
+    (inherit ghc-happy)
+    (version "1.19.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://hackage.haskell.org/package/happy/happy-"
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "138xpxdb7x62lpmgmb6b3v3vgdqqvqn4273jaap3mjmc2gla709y"))))))