update of NEST package

packages/nest/2021-07-17_fix-pyexecdir.patch

+diff --git b/CMakeLists.txt a/CMakeLists.txt
+index d879164a8..e92b21e70 100644
+--- b/CMakeLists.txt
++++ a/CMakeLists.txt
+@@ -83,7 +83,7 @@ set( target-bits-split "standard" CACHE STRING "Split of the 64-bit target neuro
+ ################################################################################
+ 
+ # In general use the CMAKE_INSTALL_<dir> and CMAKE_INSTALL_FULL_<dir> vars from
+-# GNUInstallDirs (included after calling nest_process_with_python()), but the 
++# GNUInstallDirs (included after calling nest_process_with_python()), but the
+ # CMAKE_INSTALL_DATADIR is usually just CMAKE_INSTALL_DATAROOTDIR
+ # and we want it to be CMAKE_INSTALL_DATAROOTDIR/PROJECT_NAME
+ set( CMAKE_INSTALL_DATADIR "share/${PROJECT_NAME}" CACHE STRING "Relative directory, where NEST installs its data (share/nest)" )
+@@ -130,6 +130,7 @@ nest_set_default_compiler_flags()
+ #            of GNUInstallDirs defining CMAKE_INSTALL_<dir> and CMAKE_INSTALL_FULL_<dir>.
+ nest_process_with_python()
+ include( GNUInstallDirs )
++nest_post_process_with_python()
+ nest_process_with_optimize()
+ nest_process_with_debug()
+ nest_process_with_intel_compiler_flags()
+diff --git b/cmake/ProcessOptions.cmake a/cmake/ProcessOptions.cmake
+index 1d69c1a84..7e47db25b 100644
+--- b/cmake/ProcessOptions.cmake
++++ a/cmake/ProcessOptions.cmake
+@@ -399,25 +399,25 @@ function( NEST_PROCESS_WITH_PYTHON )
+         execute_process( COMMAND "${Python_EXECUTABLE}" "-c"
+           "import sys, os; print(int(bool(os.environ.get('CONDA_DEFAULT_ENV', False)) or (sys.prefix != sys.base_prefix)))"
+           OUTPUT_VARIABLE Python_InVirtualEnv OUTPUT_STRIP_TRAILING_WHITESPACE )
+-          
++
+         if ( NOT Python_InVirtualEnv AND CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT )
+           message( FATAL_ERROR "No virtual Python environment found and no installation prefix specified. "
+             "Please either build and install NEST in a virtual Python environment or specify CMake option -DCMAKE_INSTALL_PREFIX=<nest_install_dir>.")
+         endif()
+-      
++
+         # Setting CMAKE_INSTALL_PREFIX effects the inclusion of GNUInstallDirs defining CMAKE_INSTALL_<dir> and CMAKE_INSTALL_FULL_<dir>
+         get_filename_component( Python_EnvRoot "${Python_SITELIB}/../../.." ABSOLUTE)
+         set ( CMAKE_INSTALL_PREFIX "${Python_EnvRoot}" CACHE PATH "Default install prefix for the active Python interpreter" FORCE )
+       endif ( CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT )
+ 
+-      set( HAVE_PYTHON ON PARENT_SCOPE )
+-
+       # export found variables to parent scope
++      set( HAVE_PYTHON ON PARENT_SCOPE )
+       set( Python_FOUND "${Python_FOUND}" PARENT_SCOPE )
+       set( Python_EXECUTABLE ${Python_EXECUTABLE} PARENT_SCOPE )
+       set( PYTHON ${Python_EXECUTABLE} PARENT_SCOPE )
+       set( Python_VERSION ${Python_VERSION} PARENT_SCOPE )
+-
++      set( Python_VERSION_MAJOR ${Python_VERSION_MAJOR} PARENT_SCOPE )
++      set( Python_VERSION_MINOR ${Python_VERSION_MINOR} PARENT_SCOPE )
+       set( Python_INCLUDE_DIRS "${Python_INCLUDE_DIRS}" PARENT_SCOPE )
+       set( Python_LIBRARIES "${Python_LIBRARIES}" PARENT_SCOPE )
+ 
+@@ -431,7 +431,6 @@ function( NEST_PROCESS_WITH_PYTHON )
+           set( CYTHON_VERSION "${CYTHON_VERSION}" PARENT_SCOPE )
+         endif ()
+       endif ()
+-      set( PYEXECDIR "lib/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" PARENT_SCOPE )
+     endif ()
+   elseif ( ${with-python} STREQUAL "OFF" )
+   else ()
+@@ -439,6 +438,12 @@ function( NEST_PROCESS_WITH_PYTHON )
+   endif ()
+ endfunction()
+ 
++function( NEST_POST_PROCESS_WITH_PYTHON )
++  if ( Python_FOUND )
++    set( PYEXECDIR "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" PARENT_SCOPE )
++  endif()
++endfunction()
++
+ function( NEST_PROCESS_WITH_OPENMP )
+   # Find OPENMP
+   if ( with-openmp )

packages/nest/package.py

-# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
+# 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)
@@ -8,15 +8,24 @@ from spack import *
 
 class Nest(CMakePackage):
     """NEST is a simulator for spiking neural network models
+
     It focuses on the dynamics, size and structure of neural systems rather
     than on the exact morphology of individual neurons."""
 
     homepage = "http://www.nest-simulator.org"
-    url      = "https://github.com/nest/nest-simulator/archive/refs/tags/v2.20.0.tar.gz"
+    urls     = [
+        'https://github.com/nest/nest-simulator/releases/download/v2.12.0/nest-2.12.0.tar.gz',
+        'https://github.com/nest/nest-simulator/archive/v3.0.tar.gz',
+    ]
     git      = "https://github.com/nest/nest-simulator.git"
 
     version('master', branch='master')
+    version('3.0',    sha256='d481ea67f3251fe3aadf5252ab0a999172f0cd5536c5985366d271d772e686e6')
+    patch('2021-07-17_fix-pyexecdir.patch', when='@3.0')
+    version('2.20.1', sha256='df3d32b5899d5d444f708037b290f889ac6ff8eae6b7be9e9faee2c0d660d8e5')
     version('2.20.0', sha256='40e33187c22d6e843d80095b221fa7fd5ebe4dbc0116765a91fc5c425dd0eca4')
+    version('2.18.0', sha256='7295c936fbdd5486395b06f54f0d4d35d9a1b6ee50b7b844186ec2c92de641d1')
+    version('2.16.0', sha256='abfeb61719dec54da9477be035bef1d9d764f4e7663f63f6a6d9211f967e0490')
     version('2.14.0', sha256='d6316d6c9153100a3220488abfa738958c4b65bf2622bd15540e4aa81e79f17f')
     version('2.12.0', sha256='bac578f38bb0621618ee9d5f2f1febfee60cddc000ff32e51a5f5470bb3df40d')
     version('2.10.0', sha256='2b6fc562cd6362e812d94bb742562a5a685fb1c7e08403765dbe123d59b0996c')
@@ -24,11 +33,9 @@ class Nest(CMakePackage):
     version('2.6.0',  sha256='5fe4924bc57d0c7dd820aa371de935eedf7e813832c0eee2c976b33c9a8db4cf')
     version('2.4.2',  sha256='8f86e58c1a12b733ffabd8b0400326e5a3494a458149ea8ebe9f19674d05b91b')
 
-    maintainers = ['ikitayama']
-
-    variant('python', default=False,
+    variant('python', default=True,
             description='Build the PyNest interface')
-    variant('mpi', default=False,
+    variant('mpi', default=True,
             description='Build with MPI bindings')
     variant('openmp', default=True,
             description='"Enable OpenMP support"')
@@ -49,17 +56,19 @@ class Nest(CMakePackage):
     conflicts('~openmp', when='@:2.10.99',
               msg='Option only introduced for non-ancient versions.')
 
-    depends_on('python@2.6:',       when='+python', type=('build', 'run'))
+    #depends_on('python@2.6:2.99',       when='@:2.14+python', type=('build', 'run'))
+    depends_on('python@2.6:2.99',   when='@:2.15.99+python', type=('build', 'run'))
+    depends_on('python@2.6:',       when='@2.16:+python', type=('build', 'run'))
+    depends_on('python@3.8:',       when='@3:', type=('build', 'run'))
+    depends_on('py-numpy@:1.16.99', when='@:2.14.99+python', type=('build', 'run'))
     depends_on('py-numpy',          when='+python', type=('build', 'run'))
-    depends_on('py-scipy',          when='+python', type=('run'))
     depends_on('py-cython@0.19.2:', when='+python', type='build')
     depends_on('py-nose',           when='+python', type='test')
     depends_on('py-setuptools',     when='+python', type='build')
+    depends_on('py-setuptools@:44.99.99',     when='@:2.15.99+python', type='build')
 
     depends_on('mpi', when='+mpi')
-
     depends_on('doxygen', type='build')
-
     depends_on('gsl', when='+gsl')
     depends_on('readline')
     depends_on('libtool')
@@ -78,6 +87,7 @@ class Nest(CMakePackage):
 
     @when('@:2.10.99')
     def install(self, spec, prefix):
+        # calculate the "./configure" flags (not cmake!)
         configure_args = ["CXXFLAGS=-std=c++03",
                           "--prefix=" + prefix,
                           "--with-openmp"]
@@ -94,36 +104,45 @@ class Nest(CMakePackage):
         else:
             configure_args.append("--without-optimize")
 
-        configure(*configure_args)
+        if 'mpi' in spec:
+            env['CC'] = spec['mpi'].mpicc
+            env['CXX'] = spec['mpi'].mpicxx
+            env['F77'] = spec['mpi'].mpif77
+            env['FC'] = spec['mpi'].mpifc
 
+        configure(*self.cmake_args(spec, prefix))
         make()
         make("install")
 
     def cmake_args(self):
-        args = []
+        args = [
+            "--prefix=" + prefix,
+        ]
 
         if '+mpi' in self.spec:
             args.append('-Dwith-mpi=ON')
         else:
             args.append('-Dwith-mpi=OFF')
 
-        if '+python' in self.spec:
-            args.append('-Dwith-python=ON')
-            args.append('-Dcythonize-pynest=' + self.spec['py-cython'].prefix)
+        if '+gsl' in self.spec:
+            args.append('-Dwith-gsl=' + self.spec['gsl'].prefix)
         else:
-            args.append('-Dwith-python=OFF')
-            args.append('-Dcythonize-pynest=OFF')
+            args.append('-Dwith-gsl=OFF')
+
+        if self.spec.satisfies('@:2.999'):
+            if '+python':
+                version = self.spec['python'].version[0]
+                args.append('-Dwith-python={0}'.format(version))
+                args.append('-Dcythonize-pynest=' + self.spec['py-cython'].prefix)
+            else:
+                args.append('-Dwith-python=OFF')
+                args.append('-Dcythonize-pynest=OFF')
 
         if '+optimize' in self.spec:
             args.append('-Dwith-optimize=ON')
         else:
             args.append('-Dwith-optimize=OFF')
 
-        if '+gsl' in self.spec:
-            args.append('-Dwith-gsl=' + self.spec['gsl'].prefix)
-        else:
-            args.append('-Dwith-gsl=OFF')
-
         if '+openmp' in self.spec:
             args.append('-Dwith-openmp=ON')
         else:
@@ -151,5 +170,7 @@ class Nest(CMakePackage):
                                   self.stage.source_path, recursive=True):
                 install(f, path_headers)
 
-    def setup_run_environment(self, env):
-        env.set("NEST_INSTALL_DIR", self.spec.prefix)
+    @run_after('install')
+    @on_package_attributes(run_tests=True)
+    def installcheck(self):
+        make("installcheck")