CRADL Machine Learning Proxy Spackage (#18668)

* Initial CRADL Spackage Work

Currently resolving ```--single-version-externally-managed``` error

* Fixed GPUtil Issues

Thanks to Vinay Ramakrishnaiah for overwriting install

* Finished CRADL Install Function

Finished CRADL install function which is basically copying the scripts
to the install directory. Also resolved flake8 issues for PR purposes

var/spack/repos/builtin/packages/cradl/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 Cradl(Package):
+    """The CRADL proxy application captured performance metrics during
+    inference on data from multiphysics codes, specifically ALE
+    hydrodynamics codes."""
+
+    homepage = "https://github.com/LLNL/CRADL"
+    url      = "https://github.com/LLNL/CRADL/archive/master.zip"
+    git      = "https://github.com/LLNL/CRADL.git"
+
+    version('master', branch='master')
+
+    depends_on('py-pandas')
+    depends_on('py-torch')
+    depends_on('py-torchvision')
+    depends_on('py-apex')
+    depends_on('py-gputil')
+    depends_on('py-matplotlib')
+    depends_on('py-mpi4py')
+
+    def install(self, spec, prefix):
+        # Mostly  about providing an environment so just copy everything
+        install_tree('.', prefix)

var/spack/repos/builtin/packages/py-apex/package.py

@@ -0,0 +1,18 @@
+# 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 PyApex(PythonPackage):
+    """apex: Pyramid toolkit to add Velruse, Flash Messages,CSRF,
+    ReCaptcha and Sessions."""
+
+    homepage = "https://pypi.org/project/apex/"
+    url      = "https://pypi.io/packages/source/a/apex/apex-0.9.10dev.tar.gz"
+
+    version('0.9.10dev', sha256='48aa6d9e805e661e609161bd52e0d02d89a9a32f32dc29cde6c950df58129119')
+
+    depends_on('py-setuptools', type='build')

var/spack/repos/builtin/packages/py-gputil/package.py

@@ -0,0 +1,24 @@
+# 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 PyGputil(PythonPackage):
+    """GPUtil is a Python module for getting the GPU status from NVIDA GPUs
+    using nvidia-smi."""
+
+    homepage = "https://github.com/anderskm/gputil"
+    url      = "https://pypi.io/packages/source/G/GPUtil/GPUtil-1.4.0.tar.gz"
+
+    version('1.4.0', sha256='099e52c65e512cdfa8c8763fca67f5a5c2afb63469602d5dcb4d296b3661efb9')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-wheel', type='build')
+
+    def install(self, spec, prefix):
+        # Override install to avoid
+        #   error: option --single-version-externally-managed not recognized
+        setup_py('install', '--root=/', '--prefix={0}'.format(prefix))