wtdbg2: new package (#10639)

* wtdbg2: new package at 2.3

* wtdbg2: flake8 fix

var/spack/repos/builtin/packages/wtdbg2/package.py

@@ -0,0 +1,20 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Wtdbg2(MakefilePackage):
+    """A fuzzy Bruijn graph approach to long noisy reads assembly"""
+
+    homepage = "https://github.com/ruanjue/wtdbg2"
+    url      = "https://github.com/ruanjue/wtdbg2/archive/v2.3.tar.gz"
+
+    version('2.3', sha256='fb61d38a4c60a39b3b194e63b855141c05ddcbe71cf244ae613766a9b0a56621')
+
+    depends_on('zlib')
+
+    def install(self, spec, prefix):
+        make('install', 'BIN=%s' % prefix.bin)