CMakeLists.txt

# initialize the project
cmake_minimum_required(VERSION 3.16)

set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

project(ActorDemo 
        VERSION 0.1
        DESCRIPTION "A demonstrator for C++ Actor Framework")

option(DOCKER "Set if project is built with the provided Dockerfile" OFF)

# The following code snippet is taken from
# https://cliutils.gitlab.io/modern-cmake/chapters/projects/submodule.html
# It downloads all the git submodules
if(NOT DOCKER)
  find_package(Git QUIET)
  if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
    # Update submodules as needed
    option(GIT_SUBMODULE "Check submodules during build" ON)
    if(GIT_SUBMODULE)
      message(STATUS "Submodule update")
      execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
      RESULT_VARIABLE GIT_SUBMOD_RESULT)
      if(NOT GIT_SUBMOD_RESULT EQUAL "0")
        message(FATAL_ERROR "git submodule update --init --recursive failed with ${GIT_SUBMOD_RESULT}.")
      endif()
    endif()
  endif()
  # use one example file to validate wether the git submodules are present now
  if(NOT EXISTS "${PROJECT_SOURCE_DIR}/external/caf/actor-framework/CMakeLists.txt")
    message(FATAL_ERROR "The submodules were not downloaded! GIT_SUBMODULE was "
    "turned off or failed. Please update submodules and try again.")
  endif()
endif()

set(CMAKE_VERBOSE_MAKEFILE ON)

add_subdirectory(external)
add_subdirectory(doc)
add_subdirectory(app)