gnu: Add fish-guix.

* gnu/packages/shells.scm (fish-guix): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/shells.scm

@@ -6,7 +6,7 @@
 ;;; Copyright © 2016 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2016 Stefan Reichör <stefan@xsteve.at>
 ;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2017 ng0 <contact.ng0@cryptolab.net>
+;;; Copyright © 2017 ng0 <ng0@no-reply.pragmatique.xyz>
 ;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -147,6 +147,32 @@ highlighting.")
     (home-page "https://fishshell.com/")
     (license gpl2)))
 
+(define-public fish-guix
+  (package
+    (name "fish-guix")
+    (version "0.1.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://dist.pragmatique.xyz/fish-guix/"
+                           name "-" version ".tar.xz"))
+       (sha256
+        (base32
+         "0xi0j9lvzh43lrj82gz52n2cjln0i0pgayngrg4hy5w4449biy0z"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f ; No checks.
+       #:make-flags (list
+                     (string-append "PREFIX=" %output))
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure)))) ; No configure script.
+    (home-page "https://pragmatique.noblogs.org/software/fish-guix/downloads/")
+    (synopsis "Fish completions for Guix")
+    (description
+     "Fish-guix provides completions for Guix for users of the fish shell.")
+    (license public-domain)))
+
 (define-public rc
   (package
     (name "rc")