Crow/CMakeLists.txt

#####################################
# Define Project-Wide Settings
#####################################
cmake_minimum_required(VERSION 3.15.0 FATAL_ERROR)

# Define the Project Name and Description
project (crow_all LANGUAGES CXX)

# Define the module path
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")

# Set required C++ Standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)

# Generate the compile_commands.json file
set(CMAKE_EXPORT_COMPILE_COMMANDS TRUE)

if (NOT CMAKE_BUILD_TYPE)
	message(STATUS "No build type selected, default to Release")
	set(CMAKE_BUILD_TYPE "Release")
endif()

#####################################
# Define Options
#####################################
option(BUILD_EXAMPLES "Builds the examples in the project" OFF)
option(BUILD_TESTING  "Builds the tests in the project"    OFF)

#####################################
# Define CMake Module Imports
#####################################
include(${CMAKE_SOURCE_DIR}/cmake/compiler_options.cmake)
include(${CMAKE_SOURCE_DIR}/cmake/dependencies.cmake)

#####################################
# Define project-wide imports
#####################################
# this can be alternatively (and as recommended way) done with target_include_directories()
if(BUILD_EXAMPLES OR BUILD_TESTING)
	set(PROJECT_INCLUDE_DIR
		${PROJECT_SOURCE_DIR}/include
	)

	include_directories("${PROJECT_INCLUDE_DIR}")
	include_directories("${PROJECT_SOURCE_DIR}")
	include_directories("${CMAKE_CURRENT_BINARY_DIR}")  # To include crow_all.h
endif()

#####################################
# Define Targets
#####################################
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/crow_all.h
	COMMAND python ${PROJECT_SOURCE_DIR}/scripts/merge_all.py
	${PROJECT_SOURCE_DIR}/include
	${CMAKE_CURRENT_BINARY_DIR}/crow_all.h
	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
	DEPENDS ${PROJECT_SOURCE_DIR}/include/*.h ${PROJECT_SOURCE_DIR}/include/crow/*.h ${PROJECT_SOURCE_DIR}/include/crow/middlewares/*.h
)

# Amalgamation
add_custom_target(amalgamation ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/crow_all.h)

# Examples
if(BUILD_EXAMPLES)
	add_subdirectory(examples)
endif()

# Tests
if (NOT MSVC AND BUILD_TESTING)
	add_subdirectory(tests)
	enable_testing()
	add_test(NAME crow_test COMMAND ${CMAKE_CURRENT_BINARY_DIR}/tests/unittest)
	add_test(NAME template_test COMMAND ${CMAKE_CURRENT_BINARY_DIR}/tests/template/test.py WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/tests/template)
endif()

#####################################
# Install Files
#####################################
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/crow_all.h DESTINATION include)