Add OpenAPI generator

CMakeLists.txt

@@ -7,6 +7,8 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+find_package(Python3 COMPONENTS Interpreter REQUIRED)
+
 option(USE_SYSTEM_DROGON "Use an installed Drogon package instead of CPM" OFF)
 
 if (USE_SYSTEM_DROGON)
@@ -68,5 +70,26 @@ target_link_libraries(${PROJECT_NAME}
         Drogon::Drogon
 )
 
+file(GLOB CONTROLLER_HEADERS CONFIGURE_DEPENDS
+    ${CMAKE_CURRENT_SOURCE_DIR}/controllers/*.h
+)
+set(OPENAPI_OUTPUT ${CMAKE_BINARY_DIR}/openapi/visione.openapi.json)
+add_custom_command(
+    OUTPUT ${OPENAPI_OUTPUT}
+    COMMAND ${Python3_EXECUTABLE}
+            ${CMAKE_CURRENT_SOURCE_DIR}/tools/drogon-openapi-gen/generate.py
+            --controllers ${CMAKE_CURRENT_SOURCE_DIR}/controllers
+            --out ${OPENAPI_OUTPUT}
+            --title "Visione API"
+            --version ${PROJECT_VERSION}
+    DEPENDS
+        ${CMAKE_CURRENT_SOURCE_DIR}/tools/drogon-openapi-gen/generate.py
+        ${CONTROLLER_HEADERS}
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    VERBATIM
+)
+add_custom_target(openapi ALL DEPENDS ${OPENAPI_OUTPUT})
+add_dependencies(${PROJECT_NAME} openapi)
+
 enable_testing()
 add_subdirectory(test)