Add building ovpncli swig library to cmake build

This also moves ovpncli.i to a proper place

CMakeLists.txt

@@ -9,6 +9,7 @@ set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake;${CMAKE_MODULE_PATH}")
 
 cmake_minimum_required(VERSION 3.5)
 
+add_subdirectory(client)
 add_subdirectory(test/unittests)
 add_subdirectory(test/ovpncli)
 add_subdirectory(test/ssl)

client/CMakeLists.txt

@@ -0,0 +1,37 @@
+include(findcoredeps)
+
+find_package(PythonInterp)
+find_package(PythonLibs)
+
+
+FIND_PACKAGE(SWIG 3.0)
+
+# We test building this library with python instead of java since that is easier to do and both languages should work
+if (${PYTHONLIBS_FOUND} AND ${SWIG_FOUND})
+
+    add_custom_command(
+            OUTPUT ovpncli_wrap.cxx ovpncli_wrap.h
+            COMMENT "Generating ovpncli Python swig files"
+            COMMAND ${SWIG_EXECUTABLE} -c++ -python -threads -DSWIG_PYTHON_2_UNICODE -outcurrentdir -I${CORE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/ovpncli.i
+            DEPENDS ovpncli.i
+    )
+
+    add_library(ovpnclilib SHARED
+            ovpncli.cpp
+            ovpncli_wrap.cxx
+            ovpncli_wrap.h
+            )
+
+    add_core_dependencies(ovpnclilib)
+    target_link_libraries(ovpnclilib ${PYTHON_LIBRARIES})
+    target_include_directories(ovpnclilib PRIVATE ${PYTHON_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR})
+
+    # Use proper python library name to generate _ovpncli.so/dylib/dll
+    set_target_properties(ovpnclilib PROPERTIES OUTPUT_NAME "_ovpncli")
+    set_target_properties(ovpnclilib PROPERTIES PREFIX "")
+
+    # Swig generates code with deprecated python declarations
+    set_source_files_properties(ovpncli_wrap.cxx PROPERTIES COMPILE_FLAGS "-Wno-deprecated-declarations -Wno-sometimes-uninitialized")
+else ()
+    MESSAGE(INFO "Python libraries or swig not found, skipping ovpncli swig build")
+endif ()