serialbox: setup the run and dependent build environments (#29892)

* serialbox: setup the run and dependent build environments

* Update var/spack/repos/builtin/packages/serialbox/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/serialbox/package.py b/var/spack/repos/builtin/packages/serialbox/package.py
index 49f57249d3..cf04ca2b71 100644
--- a/var/spack/repos/builtin/packages/serialbox/package.py
+++ b/var/spack/repos/builtin/packages/serialbox/package.py
@@ -48,6 +48,9 @@ class Serialbox(CMakePackage):
 
     depends_on('netcdf-c', when='+netcdf')
 
+    # The preprocessor can be run with Python 2:
+    depends_on('python', type='run')
+    # The Python interface is compatible only with Python 3:
     depends_on('python@3.4:', when='+python', type=('build', 'run'))
     depends_on('py-numpy', when='+python', type=('build', 'run'))
 
@@ -153,6 +156,20 @@ class Serialbox(CMakePackage):
 
         return flags, None, (cmake_flags or None)
 
+    def setup_run_environment(self, env):
+        # Allow for running the preprocessor directly:
+        env.prepend_path('PATH', self.prefix.python.pp_ser)
+        # Allow for running the preprocessor as a Python module, as well as
+        # enable the Python interface in a non-standard directory:
+        env.prepend_path('PYTHONPATH', self.prefix.python)
+
+    def setup_dependent_build_environment(self, env, dependent_spec):
+        self.setup_run_environment(env)
+
+    def setup_dependent_package(self, module, dependent_spec):
+        # Simplify the location of the preprocessor by dependent packages:
+        self.spec.pp_ser = join_path(self.prefix.python.pp_ser, 'pp_ser.py')
+
     def cmake_args(self):
         args = [
             '-DBOOST_ROOT:PATH=%s' % self.spec['boost'].prefix,