distro: Add GNU Which.

* distro/packages/which.scm: New file.
* Makefile.am (MODULES): Add it.

Makefile.am

@@ -80,6 +80,7 @@ MODULES =					\
   distro/packages/system.scm			\
   distro/packages/texinfo.scm			\
   distro/packages/wget.scm			\
+  distro/packages/which.scm			\
   distro/packages/zile.scm
 
 

distro/packages/which.scm

@@ -0,0 +1,47 @@
+;;; Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+;;; Copyright (C) 2012 Nikita Karetnikov <nikita@karetnikov.org>
+;;;
+;;; This file is part of Guix.
+;;;
+;;; 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.
+;;;
+;;; 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 Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (distro packages which)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu))
+
+(define-public which
+  (package
+    (name "which")
+    (version "2.20")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "mirror://gnu/which/which-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "1y2p50zadb36izzh2zw4dm5hvdiydqf3qa88l8kav20dcmfbc5yl"))))
+    (build-system gnu-build-system)
+    (home-page "https://gnu.org/software/which/")
+    (synopsis
+     "GNU Which shows the full path of (shell) commands")
+    (description
+     "GNU Which takes one or more arguments. For each of its arguments
+it prints to stdout the full path of the executables that would have
+been executed when this argument had been entered at the shell
+prompt. It does this by searching for an executable or script in the
+directories listed in the environment variable PATH using the same
+algorithm as bash(1).")
+    (license "GPLv3+"))) ; some files are under GPLv2+