nongnu: Add leiningen.

* nongnu/packages/clojure.scm (leiningen): New variable.

nongnu/packages/clojure.scm

@@ -0,0 +1,56 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
+;;;
+;;; This file is not 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 (nongnu packages clojure)
+  #:use-module (guix packages)
+  #:use-module (guix build-system ant)
+  #:use-module (guix download)
+  #:use-module ((guix licenses) #:prefix license:))
+
+(define-public leiningen
+  (package
+    (name "leiningen")
+    (version "2.9.1")
+    (source (origin
+              (method url-fetch/tarbomb)
+              (uri (string-append
+                    "https://github.com/technomancy/leiningen/archive/"
+                    version ".tar.gz"))
+              (file-name (string-append name "-" version))
+              (sha256
+               (base32
+                "0acbmgs9sq6rc24b0ly2345pvyfky03s3gzmzvi98vsp0ys3khm4"))))
+    (build-system ant-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (delete 'build)
+         (delete 'check)
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (install-file (string-append
+                            "leiningen-" ,version "/bin/lein")
+                           (string-append
+                            (assoc-ref outputs "out") "/bin")))))))
+    (home-page "https://leiningen.org")
+    (synopsis "Automating Clojure projects without setting your hair on fire")
+    (description "Leiningen is an easy way to use Clojure.  With a focus
+on project automation and declarative configuration, it gets out of your way
+and lets you focus on your code.")
+    (license license:epl1.0)))