Package: Mercury (#9903)

* added mercury package

* updating mercury package to satisfy flake8

* improved mercury package

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

@@ -0,0 +1,56 @@
+# Copyright 2013-2018 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 Mercury(CMakePackage):
+    """Mercury is a C library for implementing RPC, optimized for HPC"""
+
+    homepage = 'https://mercury-hpc.github.io/'
+    url = 'https://github.com/mercury-hpc/mercury/archive/0.9.0.tar.gz'
+    git = 'https://github.com/mercury-hpc/mercury.git'
+
+    version('develop', branch='master', submodules=True)
+    version('1.0.0', tag='v1.0.0', submodules=True)
+    version('0.9.0', tag='v0.9.0', submodules=True)
+
+    variant('cci', default=False, description='Use CCI for network transport')
+    variant('bmi', default=False, description='Use BMI for network transport')
+    variant('fabric', default=True, description='Use libfabric for network transport')
+    variant('selfforward', default=True,
+            description='Mercury will short-circuit operations' +
+                        ' by forwarding to itself when possible')
+
+    depends_on('cci@master', when='+cci', type=('build', 'link', 'run'))
+    depends_on('libfabric', when='+fabric', type=('build', 'link', 'run'))
+    depends_on('libfabric@develop', when='+fabric platform=cray', type=('build', 'link', 'run'))
+    depends_on('bmi', when='+bmi', type=('build', 'link', 'run'))
+    depends_on('openpa', type=('build', 'link', 'run'))
+
+    def cmake_args(self):
+        args = ['-DMERCURY_USE_BOOST_PP:BOOL=ON',
+                '-DBUILD_SHARED_LIBS=ON']
+
+        if (self.spec.variants['cci'].value):
+            args.extend(['-DNA_USE_CCI:BOOL=ON'])
+        else:
+            args.extend(['-DNA_USE_CCI:BOOL=OFF'])
+
+        if (self.spec.variants['bmi'].value):
+            args.extend(['-DNA_USE_BMI:BOOL=ON'])
+        else:
+            args.extend(['-DNA_USE_BMI:BOOL=OFF'])
+
+        if (self.spec.variants['fabric'].value):
+            args.extend(['-DNA_USE_OFI:BOOL=ON'])
+        else:
+            args.extend(['-DNA_USE_OFI:BOOL=OFF'])
+
+        if (self.spec.variants['selfforward'].value):
+            args.extend(['-DMERCURY_USE_SELF_FORWARD=ON'])
+        else:
+            args.extend(['-DMERCURY_USE_SELF_FORWARD=OFF'])
+
+        return args