esys-particle: add new package esys-particle (#25338)

* esys-particle: add new package esys-particle

* esys-particle: requested changes

* esys-particle: placating isort

var/spack/repos/builtin/packages/esys-particle/package.py

@@ -0,0 +1,39 @@
+# Copyright 2013-2021 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 llnl.util.filesystem import find
+
+from spack import *
+
+
+class EsysParticle(CMakePackage):
+    """ESyS-Particle is Open Source software for particle-based numerical
+    modelling. The software implements the Discrete Element Method (DEM),
+    a widely used technique for modelling processes involving large
+    deformations, granular flow and/or fragmentation."""
+
+    homepage = "https://launchpad.net/esys-particle"
+    url      = "https://launchpadlibrarian.net/539636757/esys-particle-3.0-alpha.tar.gz"
+
+    maintainers = ['snehring']
+
+    version('3.0-alpha', sha256='4fba856a95c93991cacb904e6a54a7ded93558f7adc8c3e6da99bc347843a434')
+
+    depends_on('mpi')
+    depends_on('boost@1.71.0+python')
+    depends_on('python@3.6:')
+    depends_on('py-setuptools', type='build')
+
+    @when('@3.0-alpha')
+    def patch(self):
+        files = find('.', 'CMakeLists.txt')
+        for file in files:
+            filter_file('PYTHON_LIBRARIES', 'Python_LIBRARIES',
+                        file, string=True)
+
+    def setup_run_environment(self, env):
+        pylibpath = join_path(self.prefix.lib, "python{0}".format(
+                              self.spec["python"].version.up_to(2)))
+        env.prepend_path('PYTHONPATH', join_path(pylibpath, 'dist-packages'))