[py] Install python modules into spec. dir. in the build folder.

Allows co-existance with ogstools python package in build dir virtual environment.

Requires to uninstall ogs wheel in venv and to set the PYTHONPATH (both handled by CMake and .envrc-file used by the direnv-tool).

Applications/Python/CMakeLists.txt

-set(_py_site_packages_dir
-    "lib/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages"
-)
-if(WIN32)
-    set(_py_site_packages_dir "Lib/site-packages")
-endif()
-
 # wheel: Install into Python module root dir (enables 'import ogs.simulator')
 set(_py_install_location ogs)
+set(_py_build_location ogs)
 if(NOT OGS_BUILD_WHEEL)
-    set(_py_install_location "${_py_site_packages_dir}/ogs")
+    set(_py_install_location
+        "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages/ogs"
+    )
+    set(_py_build_location "${PROJECT_BINARY_DIR}/site-packages/ogs")
 endif()
 
 add_subdirectory(ogs)
@@ -18,13 +15,12 @@ add_subdirectory(ogs.callbacks)
 
 if(OGS_USE_PIP)
     set_target_properties(
-        simulator mesh callbacks
-        PROPERTIES LIBRARY_OUTPUT_DIRECTORY
-                   ${LOCAL_VIRTUALENV_DIR}/${_py_site_packages_dir}/ogs
+        simulator mesh callbacks PROPERTIES LIBRARY_OUTPUT_DIRECTORY
+                                            ${_py_build_location}
     )
     file(
         COPY ogs/.
-        DESTINATION ${LOCAL_VIRTUALENV_DIR}/${_py_site_packages_dir}/ogs
+        DESTINATION ${_py_build_location}
         PATTERN "__pycache__" EXCLUDE
         PATTERN "CMakeLists.txt" EXCLUDE
     )

CMakeLists.txt

@@ -238,6 +238,7 @@ set(_envrc_content
     "[ -d \"${PROJECT_BINARY_DIR}/.venv\" ] && source ${PROJECT_BINARY_DIR}/.venv/bin/activate"
     "export PATH=$PATH:${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}"
     "export OGS_USE_PATH=1"
+    "export PYTHONPATH=${PROJECT_BINARY_DIR}/site-packages:$PYTHONPATH"
 )
 if(TFEL_WITH_PYTHON)
     set(_envrc_content "${_envrc_content}"

scripts/cmake/PythonSetup.cmake

@@ -175,6 +175,11 @@ function(setup_venv)
                     "To disable pip set OGS_USE_PIP=OFF.\n\n${_out}\n${_err}"
             )
         endif()
+        # Uninstall ogs wheel
+        execute_process(
+            COMMAND ${_apple_env} ${LOCAL_VIRTUALENV_BIN_DIR}/pip uninstall
+                    --yes ogs WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+        )
     endif()
 endfunction()