New package butter (#4679)

* butter: new package

* butter: fixed dependency type

var/spack/repos/builtin/packages/butter/package.py

@@ -0,0 +1,46 @@
+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program 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 terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+
+class Butter(Package):
+    """butter: Bowtie UTilizing iTerative placEment of Repetitive small rnas.
+       A wrapper for bowtie to produce small RNA-seq alignments where
+       multimapped small RNAs tend to be placed near regions of confidently
+       high density."""
+
+    homepage = "https://github.com/MikeAxtell/butter"
+    url      = "https://github.com/MikeAxtell/butter/archive/v0.3.3.tar.gz"
+
+    version('0.3.3', '806ff3cb7afc1d8b75126404056c629d')
+
+    depends_on('perl', type=('build', 'run'))
+    depends_on('samtools')
+    depends_on('bowtie')
+
+    def install(self, spec, prefix):
+        mkdirp(prefix.bin)
+        install('butter', prefix.bin)
+        install('bam2wig', prefix.bin)