cmake_minimum_required(VERSION 3.1)
project(docopt.cpp VERSION 0.6.1)

include(GNUInstallDirs)

#============================================================================
# Settable options
#============================================================================
option(WITH_TESTS "Build tests." OFF)
option(WITH_EXAMPLE "Build example." OFF)
option(USE_BOOST_REGEX "Replace std::regex with Boost.Regex" OFF)

#============================================================================
# Internal compiler options
#============================================================================
# C++ standard
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
if(NOT CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD LESS 11)
	set(CMAKE_CXX_STANDARD 11)
endif()

# Suppression of "unknown pragma" warning on GCC
if(CMAKE_COMPILER_IS_GNUCXX)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-pragmas") # Code uses #pragma mark
endif()

#============================================================================
# Sources & headers
#============================================================================
set(docopt_SOURCES docopt.cpp)
set(docopt_HEADERS
		docopt.h
		docopt_private.h
		docopt_util.h
		docopt_value.h
		)

#============================================================================
# Compile targets
#============================================================================
if(MSVC OR XCODE)
    # MSVC requires __declspec() attributes, which are achieved via the 
    # DOCOPT_DLL and DOCOPT_EXPORTS macros below. Since those macros are only
    # defined when building a shared library, we must build the shared and
    # static libraries completely separately.
    # Xcode does not support libraries with only object files as sources.
    # See https://cmake.org/cmake/help/v3.0/command/add_library.html?highlight=add_library
    add_library(docopt SHARED ${docopt_SOURCES} ${docopt_HEADERS})
    add_library(docopt_s STATIC ${docopt_SOURCES} ${docopt_HEADERS})
else()
    # If not using MSVC or Xcode, we will create an intermediate object target
    # to avoid compiling the source code twice.
    add_library(docopt_o OBJECT ${docopt_SOURCES} ${docopt_HEADERS})
    set_target_properties(docopt_o PROPERTIES POSITION_INDEPENDENT_CODE TRUE)

    add_library(docopt SHARED $<TARGET_OBJECTS:docopt_o>)
    add_library(docopt_s STATIC $<TARGET_OBJECTS:docopt_o>)
endif()

target_include_directories(docopt PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}> $<INSTALL_INTERFACE:include/docopt>)
target_include_directories(docopt_s PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}> $<INSTALL_INTERFACE:include/docopt>)

if(MSVC)
    # DOCOPT_DLL: Must be specified when building *and* when using the DLL.
    #             That's what the "PUBLIC" means.
    # DOCOPT_EXPORTS: Must use __declspec(dllexport) when building the DLL.
    #                 "PRIVATE" means it's only defined when building the DLL.
    target_compile_definitions(docopt PUBLIC  DOCOPT_DLL
                                      PRIVATE DOCOPT_EXPORTS)
endif()

if(NOT MSVC)
	set_target_properties(docopt PROPERTIES OUTPUT_NAME docopt)
	set_target_properties(docopt_s PROPERTIES OUTPUT_NAME docopt)
endif()

set_target_properties(docopt PROPERTIES
        VERSION ${docopt.cpp_VERSION}
        SOVERSION 0)

if(USE_BOOST_REGEX)
	add_definitions("-DDOCTOPT_USE_BOOST_REGEX")
	# This is needed on Linux, where linking a static library into docopt.so
	# fails because boost static libs are not compiled with -fPIC
	set(Boost_USE_STATIC_LIBS OFF)
    find_package(Boost 1.53 REQUIRED COMPONENTS regex)
    include_directories(${Boost_INCLUDE_DIRS})
    target_link_libraries(docopt ${Boost_LIBRARIES})
	if(WITH_STATIC)
		target_link_libraries(docopt_s ${Boost_LIBRARIES})
	endif()
endif()

#============================================================================
# Examples
#============================================================================
if(WITH_EXAMPLE)
	add_executable(docopt_example examples/naval_fate.cpp)
	target_link_libraries(docopt_example docopt)
endif()

#============================================================================
# Tests
#============================================================================
if(WITH_TESTS)
	set(TESTPROG "${CMAKE_CURRENT_BINARY_DIR}/run_testcase")
	set(TESTCASES "${PROJECT_SOURCE_DIR}/testcases.docopt")
	add_executable(run_testcase run_testcase.cpp)
	target_link_libraries(run_testcase docopt)
	configure_file(
			"${PROJECT_SOURCE_DIR}/run_tests.py"
			"${CMAKE_CURRENT_BINARY_DIR}/run_tests"
			ESCAPE_QUOTES
	)
	add_test("Testcases docopt" ${TESTPROG})
endif()

#============================================================================
# Install
#============================================================================
set(export_name "docopt-targets")

# Runtime package
install(TARGETS docopt EXPORT ${export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})

# Development package
install(TARGETS docopt_s EXPORT ${export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})
install(FILES ${docopt_HEADERS} DESTINATION include/docopt)

# CMake Package
include(CMakePackageConfigHelpers)
write_basic_package_version_file("${PROJECT_BINARY_DIR}/docopt-config-version.cmake" COMPATIBILITY SameMajorVersion)
install(FILES docopt-config.cmake ${PROJECT_BINARY_DIR}/docopt-config-version.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
install(EXPORT ${export_name} DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")

#============================================================================
# CPack
#============================================================================
set(CPACK_PACKAGE_NAME "docopt")
set(CPACK_DEBIAN_PACKAGE_DEPENDS "")
set(CPACK_RPM_PACKAGE_REQUIRES "")
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Beautiful command line interfaces")
set(CPACK_PACKAGE_VENDOR "Jared Grubb")
set(CPACK_PACKAGE_CONTACT ${CPACK_PACKAGE_VENDOR})
set(CPACK_PACKAGE_DESCRIPTION_FILE "${PROJECT_SOURCE_DIR}/README.rst")
set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE-MIT")
set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
set(CPACK_DEBIAN_PACKAGE_SECTION "Development")
set(CPACK_RPM_PACKAGE_GROUP "Development/Libraries")
set(CPACK_RPM_PACKAGE_LICENSE "MIT")
set(CPACK_STRIP_FILES TRUE)
include(CPack)