From c2784b2d419a63fc81a52391b93254db2783725c Mon Sep 17 00:00:00 2001
From: eugeneswalker <38933153+eugeneswalker@users.noreply.github.com>
Date: Fri, 26 Feb 2021 07:15:08 -0800
Subject: amr-wind: new package (#21883)

* amr-wind: new package

* amr-wind: simplify cuda_arch mapping

* simplify
---
 .../repos/builtin/packages/amr-wind/package.py     | 111 +++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 var/spack/repos/builtin/packages/amr-wind/package.py

diff --git a/var/spack/repos/builtin/packages/amr-wind/package.py b/var/spack/repos/builtin/packages/amr-wind/package.py
new file mode 100644
index 0000000000..7d4651e580
--- /dev/null
+++ b/var/spack/repos/builtin/packages/amr-wind/package.py
@@ -0,0 +1,111 @@
+# 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 spack import *
+import itertools
+
+
+def process_amrex_constraints():
+    """Map constraints when building with external AMReX"""
+    a1 = ['+', '~']
+    a2 = ['mpi', 'hypre', 'cuda']
+    a3 = [[x + y for x in a1] for y in a2]
+    for k in itertools.product(*a3):
+        if '+cuda' in k:
+            for arch in CudaPackage.cuda_arch_values:
+                yield ''.join(k) + " cuda_arch=%s" % arch
+        else:
+            yield ''.join(k)
+
+
+class AmrWind(CMakePackage, CudaPackage):
+    """AMR-Wind is a massively parallel, block-structured adaptive-mesh,
+    incompressible flow sover for wind turbine and wind farm simulations. """
+
+    homepage = "https://github.com/Exawind/amr-wind"
+    git      = "https://github.com/exawind/amr-wind.git"
+
+    maintainers = ['sayerhs', 'jrood-nrel', 'michaeljbrazell']
+
+    tags = ['ecp', 'ecp-apps']
+
+    version('main', branch='main', submodules=True)
+
+    variant('shared', default=True,
+            description='Build shared libraries')
+    variant('unit', default=True,
+            description='Build unit tests')
+    variant('tests', default=True,
+            description='Activate regression tests')
+    variant('mpi', default=True,
+            description='Enable MPI support')
+    variant('openmp', default=False,
+            description='Enable OpenMP for CPU builds')
+    variant('netcdf', default=True,
+            description='Enable NetCDF support')
+    variant('hypre', default=True,
+            description='Enable Hypre integration')
+    variant('masa', default=False,
+            description='Enable MASA integration')
+    variant('openfast', default=False,
+            description='Enable OpenFAST integration')
+    variant('internal-amrex', default=True,
+            description='Use AMRex submodule to build')
+    variant('fortran', default=False,
+            description='Build fortran interfaces')
+
+    conflicts('+openmp', when='+cuda')
+
+    depends_on('mpi', when='+mpi')
+
+    for opt in process_amrex_constraints():
+        dopt = '+particles' + opt
+        if '+hypre' in dopt:
+            dopt = "+fortran" + dopt
+        depends_on('amrex@develop' + dopt, when='~internal-amrex' + opt)
+
+    depends_on('hypre+mpi+int64~cuda@2.20.0:', when='+mpi~cuda+hypre')
+    depends_on('hypre~mpi+int64~cuda@2.20.0:', when='~mpi~cuda+hypre')
+    for arch in CudaPackage.cuda_arch_values:
+        depends_on('hypre+mpi~int64+cuda cuda_arch=%s @2.20.0:' % arch,
+                   when='+mpi+cuda+hypre cuda_arch=%s' % arch)
+        depends_on('hypre~mpi~int64+cuda cuda_arch=%s @2.20.0:' % arch,
+                   when='~mpi+cuda+hypre cuda_arch=%s' % arch)
+    depends_on('netcdf-c', when='+netcdf')
+    depends_on('masa', when='+masa')
+    depends_on('openfast+cxx', when='+openfast')
+
+    def cmake_args(self):
+        define = CMakePackage.define
+
+        vs = ["mpi", "cuda", "openmp", "netcdf", "hypre", "masa",
+              "openfast", "tests", "fortran"]
+        args = [
+            self.define_from_variant("AMR_WIND_ENABLE_%s" % v.upper(), v)
+            for v in vs
+        ]
+
+        args += [
+            define('CMAKE_EXPORT_COMPILE_COMMANDS', True),
+            define('AMR_WIND_ENABLE_ALL_WARNINGS', True),
+            self.define_from_variant('BUILD_SHARED_LIBS', 'shared'),
+            self.define_from_variant('AMR_WIND_TEST_WITH_FCOMPARE', 'tests'),
+        ]
+
+        if '+cuda' in self.spec:
+            amrex_arch = ['{0:.1f}'.format(float(i) / 10.0)
+                          for i in self.spec.variants['cuda_arch'].value]
+            if amrex_arch:
+                args.append(define('AMReX_CUDA_ARCH', amrex_arch))
+
+        if '+internal-amrex' in self.spec:
+            args.append(self.define('AMR_WIND_USE_INTERNAL_AMREX', True))
+        else:
+            args += [
+                self.define('AMR_WIND_USE_INTERNAL_AMREX', False),
+                self.define('AMReX_ROOT', self.spec['amrex'].prefix)
+            ]
+
+        return args
-- 
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