EasyBuild and dependencies (#3658)

* add packages for EasyBuild and dependencies

* fix remarks w.r.t. docstrings & download urls, make dependency specs stricter w.r.t. required versions

* fix easybuild-* dep specs, should be open-ended

* correct dep specs for easybuild and easybuild-easyconfigs using @3.1.2[:]

var/spack/repos/builtin/packages/py-vsc-install/package.py

@@ -0,0 +1,36 @@
+##############################################################################
+# Copyright (c) 2017, Kenneth Hoste
+#
+# This file is part of Spack.
+# Created by Kenneth Hoste, kenneth.hoste@gmail.com
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file 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 PyVscInstall(PythonPackage):
+    """Shared setuptools functions and classes
+    for Python libraries developed by HPC-UGent.
+    """
+
+    homepage = 'https://github.com/hpcugent/vsc-install/'
+    url      = 'https://pypi.io/packages/source/v/vsc-install/vsc-install-0.10.25.tar.gz'
+
+    version('0.10.25', 'd1b9453a75cb56dba0deb7a878047b51')
+
+    depends_on('py-setuptools', type=('build', 'run'))