gchp: added new package (#21310)

Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

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

@@ -0,0 +1,54 @@
+# 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 shutil
+
+
+class Gchp(CMakePackage):
+    """GEOS-Chem High Performance model of atmospheric chemistry"""
+
+    homepage = "https://gchp.readthedocs.io/"
+    url      = "https://github.com/geoschem/GCHP/archive/13.0.0-rc.0.tar.gz"
+
+    maintainers = ['williamdowns']
+
+    version('13.0.0-rc.0', git='https://github.com/geoschem/GCHP.git',
+            commit='4bd15316faf4e5f06517d3a6b1df1986b1126d90',  submodules=True)
+    # NOTE: Post-13.0.0-rc.0 versions will have fix that
+    # allows these ESMF variants to be enabled
+    depends_on('esmf@8.0.1: -lapack -pio -pnetcdf -xerces')
+    depends_on('mpi@3')
+    depends_on('netcdf-fortran')
+    depends_on('cmake@3.13:')
+
+    variant('omp',   default=False, description="OpenMP parallelization")
+    variant('real8', default=True,  description="REAL*8 precision")
+    variant('apm',   default=False, description="APM Microphysics (Experimental)")
+    variant('rrtmg', default=False, description="RRTMG radiative transfer model")
+    variant('luo',   default=False, description="Luo et al 2019 wet deposition scheme")
+    variant('tomas', default=False, description="TOMAS Microphysics (Experimental)")
+
+    def cmake_args(self):
+        args = [self.define("RUNDIR", self.prefix),
+                self.define_from_variant('OMP', 'omp'),
+                self.define_from_variant('USE_REAL8', 'real8'),
+                self.define_from_variant('APM', 'apm'),
+                self.define_from_variant('RRTMG', 'rrtmg'),
+                self.define_from_variant('LUO_WETDEP', 'luo'),
+                self.define_from_variant('TOMAS', 'tomas')]
+        return args
+
+    def install(self, spec, prefix):
+        super().install(spec, prefix)
+        # Preserve source code in prefix for two reasons:
+        # 1. Run directory creation occurs independently of code compilation,
+        # possibly multiple times depending on user needs,
+        # and requires the preservation of some of the source code structure.
+        # 2. Run configuration is relatively complex and can result in error
+        # messages that point to specific modules / lines of the source code.
+        # Including source code thus facilitates runtime debugging.
+        shutil.move(self.stage.source_path,
+                    join_path(prefix, 'source_code'))