cmake_minimum_required(VERSION 3.22)
if(BUILD_TESTING OR NOT DEFINED BUILD_TESTING)
    # The tests are C++
    set(languages C CXX)
else()
    set(languages C)
endif()
project(c-capnproto LANGUAGES ${languages})

include(CTest)

set(CMAKE_C_STANDARD 11)
set(CMAKE_C_EXTENSIONS NO)
if(BUILD_TESTING)
    set(CMAKE_CXX_STANDARD 20)
    set(CMAKE_CXX_EXTENSIONS NO)
endif()

# Stop noise if CXX compiler is set.
set(ignoreAndAvoidCMakeUnusedWarning "${CMAKE_CXX_COMPILER}")

# Boilerplate DK CMAKE PROJ 2023-05-17.1
if(APPLE)
    set(CMAKE_MACOSX_RPATH OFF)
endif()

# Boilerplate DK CMAKE PROJ 2023-09-25.1
set(default_build_shared)
if(NOT (ANDROID OR IOS))
    set(default_build_shared ON)
endif()
option(BUILD_SHARED_LIBS "Build shared libraries (.dll/.so) instead of static ones (.lib/.a)" ${default_build_shared})

# Build hygiene: Tools for keeping the source code clean. By default
# we try to enforce build hygiene.
# You can override with either BUILD_HYGIENE=DISABLED or
# BUILD_HYGIENE=ENABLED.
if(NOT BUILD_HYGIENE STREQUAL DISABLED)
    if(BUILD_HYGIENE STREQUAL ENABLED)
        set(find_program_args REQUIRED)
    else()
        set(find_program_args)
    endif()
    find_program(CLANG_TIDY_PROGRAM
            NAMES clang-tidy
            PATHS
            # On macOS the easiest way to get clang-tidy is to install the
            # keg-only (not installed into PATH) big `llvm` package.
            /opt/homebrew/opt/llvm/bin
            /usr/local/opt/llvm/bin
            ${find_program_args})
endif()

add_library(CapnC_Runtime
        lib/capn.c
        lib/capn-malloc.c
        lib/capn-stream.c
        lib/capnp_c.h)
add_library(CapnC::Runtime ALIAS CapnC_Runtime)
set_target_properties(CapnC_Runtime PROPERTIES
        EXPORT_NAME Runtime
        POSITION_INDEPENDENT_CODE ON
        WINDOWS_EXPORT_ALL_SYMBOLS ON)
target_include_directories(CapnC_Runtime
        PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/compiler>
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/lib>
        $<INSTALL_INTERFACE:include>)

add_executable(capnpc-c
        compiler/capnpc-c.c
        compiler/schema.capnp.c
        compiler/str.c)
target_link_libraries(capnpc-c CapnC_Runtime)
target_include_directories(capnpc-c
        PRIVATE lib)

# Boilerplate DK CMAKE PROJ 2023-05-17.3
if(BUILD_SHARED_LIBS)
    if(APPLE)
        set(base @loader_path)
    else()
        set(base $ORIGIN)
    endif()
    file(RELATIVE_PATH relDir
        ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}
        ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
    set(CMAKE_INSTALL_RPATH
        # best practice RPATH locations when installed
        ${base}
        ${base}/${relDir})
endif()

option(C_CAPNPROTO_ENABLE_INSTALL "Add instructions for 'cmake --install' of CapnC_Runtime library and capnpc-c executable" ON)
if(C_CAPNPROTO_ENABLE_INSTALL)
    install(TARGETS CapnC_Runtime capnpc-c
            EXPORT CapnC)
    install(EXPORT CapnC
            DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/CapnC
            NAMESPACE CapnC::
            FILE CapnCConfig.cmake)
    install(FILES lib/capnp_c.h TYPE INCLUDE)
endif()

if(BUILD_TESTING AND CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
    add_subdirectory(tests)
endif()