08/08: gnu: Add ghc-gitrev.

[Ricardo Wurmus]

rekado pushed a commit to branch master
in repository guix.

commit af4db693dbb2413b910212ff6104f6086d8389fe
Author: Alex Vong <address@hidden>
Date:   Mon Aug 7 15:22:00 2017 +0800

    gnu: Add ghc-gitrev.
    
    * gnu/packages/haskell.scm (ghc-gitrev): New variable.
    
    Signed-off-by: Ricardo Wurmus <address@hidden>
---
 gnu/packages/haskell.scm | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 14cc228..4f9e90e 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -5797,6 +5797,28 @@ maintained mirror of the 
@uref{https://hackage.haskell.org/package/geniplate,
 geniplate} package, written by Lennart Augustsson.")
     (license license:bsd-3)))
 
+(define-public ghc-gitrev
+  (package
+    (name "ghc-gitrev")
+    (version "1.3.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://hackage.haskell.org/package/gitrev/gitrev-";
+                           version ".tar.gz"))
+       (sha256
+        (base32 "0cl3lfm6k1h8fxp2vxa6ihfp4v8igkz9h35iwyq2frzm4kdn96d8"))))
+    (build-system haskell-build-system)
+    (inputs `(("ghc-base-compat" ,ghc-base-compat)))
+    (home-page "https://github.com/acfoltzer/gitrev";)
+    (synopsis "Compile git revision info into Haskell projects")
+    (description
+     "This package provides some handy Template Haskell splices for including
+the current git hash and branch in the code of your project.  This is useful
+for including in panic messages, @command{--version} output, or diagnostic
+info for more informative bug reports.")
+    (license license:bsd-3)))
+
 (define-public ghc-haskell-src-meta
   (package
     (name "ghc-haskell-src-meta")