Moreutils: add new package (#14653)

* moreutils: add new package

* fix flake8

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

@@ -0,0 +1,30 @@
+# Copyright 2013-2020 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 Moreutils(MakefilePackage):
+    """Additional Unix utilities. This is a growing collection of the Unix
+    tools that nobody thought to write long ago, when Unix was young."""
+
+    homepage = "https://joeyh.name/code/moreutils"
+    url      = "https://deb.debian.org/debian/pool/main/m/moreutils/moreutils_0.63.orig.tar.xz"
+
+    maintainers = ['matthiasdiener']
+
+    version('0.63', sha256='01f0b331e07e62c70d58c2dabbb68f5c4ddae4ee6f2d8f070fd1e316108af72c')
+
+    depends_on('perl', type='build')
+    depends_on('docbook-xsl', type='build')
+    depends_on('libxml2', type='build')
+
+    def edit(self, spec, prefix):
+        isutf8_makefile = FileFilter('is_utf8/Makefile')
+        isutf8_makefile.filter('CC = .*', '')
+
+        env['DOCBOOKXSL'] = spec['docbook-xsl'].prefix
+        env['PREFIX'] = self.prefix