refactor: dissolved the dual module and plugin nature for LibiglCopyleft

Module/CMakeLists.txt

@@ -1 +1,57 @@
-add_subdirectory (../src ./bin/) 
+if(NOT Eigen3_FOUND)
+  vtk_module_find_package(PACKAGE Eigen3 VERSION 3.3 CONFIG_MODE PRIVATE)
+endif()
+
+vtk_module_find_package(PACKAGE CGAL VERSION 5.1.1 CONFIG_MODE PRIVATE)
+
+if(NOT DEFINED LIBIGL_DIR)
+  message(FATAL_ERROR "The CMake variable LIBIGL_DIR is undefined.")
+endif()
+
+if(${LIBIGL_DIR} STREQUAL "")
+  message(FATAL_ERROR "The CMake variable LIBIGL_DIR is an empty string.")
+endif()
+
+if(NOT TARGET igl::core)
+  include(LibiglOptions)
+  add_subdirectory(${LIBIGL_DIR} ${CMAKE_BINARY_DIR}/bin/libigl)
+endif()
+
+# Define content
+set(classes
+  stkLibiglBoolean3DMesher
+)
+
+vtk_module_add_module(ParaView::stkLibiglCopyleft
+  CLASSES ${classes}
+  PRIVATE_HEADERS ${private_headers}
+)
+
+if(CGAL_FOUND)
+  include(${CGAL_USE_FILE})
+
+  # Activate concurrency ? (turned ON by default)
+  option(CGAL_ACTIVATE_CONCURRENCY
+    "Enable concurrency"
+    ON)
+
+  vtk_module_definitions(ParaView::stkLibiglCopyleft PRIVATE NOMINMAX)
+
+  # Link with CGAL
+  vtk_module_link(ParaView::stkLibiglCopyleft PUBLIC CGAL::CGAL)
+
+  if(CGAL_ACTIVATE_CONCURRENCY)
+    if (NOT TARGET TBB::tbb)
+      find_package(TBB REQUIRED)
+    endif ()
+
+    if(TBB_FOUND)
+      vtk_module_definitions(ParaView::stkLibiglCopyleft PRIVATE CGAL_LINKED_WITH_TBB)
+      vtk_module_link(ParaView::stkLibiglCopyleft PRIVATE TBB::tbbmalloc TBB::tbb)
+    endif(TBB_FOUND)
+  endif(CGAL_ACTIVATE_CONCURRENCY)
+endif(CGAL_FOUND)
+
+vtk_module_include(ParaView::stkLibiglCopyleft PRIVATE ${LIBIGL_DIR}/include)
+
+vtk_module_link(ParaView::stkLibiglCopyleft PUBLIC Eigen3::Eigen)