gnu: Add fish.

* gnu/packages/fish.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu-system.am

@@ -76,6 +76,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/elf.scm				\
   gnu/packages/emacs.scm			\
   gnu/packages/file.scm				\
+  gnu/packages/fish.scm				\
   gnu/packages/flex.scm				\
   gnu/packages/fltk.scm				\
   gnu/packages/fonts.scm			\

gnu/packages/fish.scm

@@ -0,0 +1,57 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 David Thompson <davet@gnu.org>
+;;;
+;;; 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 fish)
+  #:use-module (guix licenses)
+  #:use-module (gnu packages doxygen)
+  #:use-module (gnu packages ncurses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu))
+
+(define-public fish
+  (package
+    (name "fish")
+    (version "2.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "http://fishshell.com/files/"
+                                  version "/fish-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0i7h3hx8iszli3d4kphw79sz9m07f2lc2c9hr9smdps5s7wpllmg"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("doxygen" ,doxygen)))
+    (inputs
+     `(("ncurses" ,ncurses)))
+    (arguments
+     '(#:tests? #f)) ; no check target
+    (synopsis "The friendly interactive shell")
+    (description
+     "Fish (friendly interactive shell) is a shell focused on interactive use,
+discoverability, and friendliness.  Fish has very user-friendly and powerful
+tab-completion, including descriptions of every completion, completion of
+strings with wildcards, and many completions for specific commands.  It also
+has extensive and discoverable help.  A special help command gives access to
+all the fish documentation in your web browser. Other features include smart
+terminal handling based on terminfo, an easy to search history, and syntax
+highlighting. ")
+    (home-page "http://fishshell.com/")
+    (license gpl2)))