openPMD-api: pre-load depend libs (#12279)

When loading `openpmd-api` as a lib to build outside of
spack or to build depending spack packages, the "CMake-PUBLIC"
header-only library MPark.Variant must be available. Also,
the `*Config.cmake` package must be able to find dependent
libs if used.

1 files changed, 23 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/openpmd-api/package.py b/var/spack/repos/builtin/packages/openpmd-api/package.py
index ccda775a1c..91084ba468 100644
--- a/var/spack/repos/builtin/packages/openpmd-api/package.py
+++ b/var/spack/repos/builtin/packages/openpmd-api/package.py
@@ -92,3 +92,26 @@ class OpenpmdApi(CMakePackage):
             args.append('-DopenPMD_USE_INTERNAL_CATCH:BOOL=OFF')
 
         return args
+
+    def setup_environment(self, spack_env, run_env):
+        spec = self.spec
+        # pre-load dependent CMake-PUBLIC header-only libs
+        run_env.prepend_path('CMAKE_PREFIX_PATH', spec['mpark-variant'].prefix)
+        run_env.prepend_path('CPATH', spec['mpark-variant'].prefix.include)
+
+        # more deps searched in openPMDConfig.cmake
+        if spec.satisfies("+mpi"):
+            run_env.prepend_path('CMAKE_PREFIX_PATH', spec['mpi'].prefix)
+        if spec.satisfies("+adios1"):
+            run_env.prepend_path('CMAKE_PREFIX_PATH', spec['adios'].prefix)
+        if spec.satisfies("+adios2"):
+            run_env.prepend_path('CMAKE_PREFIX_PATH', spec['adios2'].prefix)
+        if spec.satisfies("+hdf5"):
+            run_env.prepend_path('CMAKE_PREFIX_PATH', spec['hdf5'].prefix)
+
+    def setup_dependent_environment(self, spack_env, run_env, dependent_spec):
+        # pre-load dependent CMake-PUBLIC header-only libs
+        spack_env.prepend_path('CMAKE_PREFIX_PATH',
+                               self.spec['mpark-variant'].prefix)
+        spack_env.prepend_path('CPATH',
+                               self.spec['mpark-variant'].prefix.include)