[bug#49939] [PATCH 1/2] gnu: Add ghc-filelock.

[Matthew James Kraai]

* gnu/packages/haskell-xyz.scm (ghc-filelock): New variable.
---
 gnu/packages/haskell-xyz.scm | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index bb59476795..4393b77348 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -28,6 +28,7 @@
 ;;; Copyright © 2020 Alexandru-Sergiu Marton <brown121407@member.fsf.org>
 ;;; Copyright © 2020 Carlo Holl <carloholl@gmail.com>
 ;;; Copyright © 2020 Christopher Lemmer Webber <cwebber@dustycloud.org>
+;;; Copyright © 2021 Matthew James Kraai <kraai@ftbfs.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -4478,6 +4479,31 @@ the files in a directory, and turn them into 
@code{(path, bytestring)} pairs
 embedded in your Haskell code.")
     (license license:bsd-3)))
 
+(define-public ghc-filelock
+  (package
+    (name "ghc-filelock")
+    (version "0.1.1.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://hackage.haskell.org/package/filelock/filelock-";
+             version
+             ".tar.gz"))
+       (sha256
+        (base32
+         "189n4pvq7f4d235smg2iqs2m5rqmnjdxflifq0mnb2qdbc4jjznr"))))
+    (build-system haskell-build-system)
+    (native-inputs `(("ghc-async" ,ghc-async)))
+    (home-page
+     "http://github.com/takano-akio/filelock";)
+    (synopsis
+     "Portable interface to file locking (flock / LockFileEx)")
+    (description
+     "This package provides a Haskell interface to Windows and Unix file
+locking functionalities.")
+    (license license:public-domain)))
+
 (define-public ghc-filemanip
   (package
     (name "ghc-filemanip")
-- 
2.32.0