artemis/cmake/wg.cmake

# cmake/wg.cmake — WireGuard client integration for Artemis (Sunshine fork).
#
# Include from the top-level CMakeLists.txt:
#
#   include(cmake/wg.cmake)
#   artemis_wg_configure(sunshine)   # pass the name of your app target
#
# Prerequisites:
#   Run scripts/build-boringtun.sh (Linux/macOS) or
#       scripts/build-boringtun-win.ps1 (Windows)
#   to produce deps/boringtun/libboringtun.a (or .lib on Windows).

# ─── boringtun static library ─────────────────────────────────────────────────

if(WIN32)
    set(ARTEMIS_BORINGTUN_LIB "${CMAKE_SOURCE_DIR}/deps/boringtun/boringtun.lib")
else()
    set(ARTEMIS_BORINGTUN_LIB "${CMAKE_SOURCE_DIR}/deps/boringtun/libboringtun.a")
endif()

if(NOT EXISTS "${ARTEMIS_BORINGTUN_LIB}")
    message(FATAL_ERROR
        "boringtun library not found at ${ARTEMIS_BORINGTUN_LIB}\n"
        "Run the appropriate build script in scripts/ and re-run CMake.")
endif()

add_library(artemis_boringtun STATIC IMPORTED GLOBAL)
set_target_properties(artemis_boringtun PROPERTIES
    IMPORTED_LOCATION "${ARTEMIS_BORINGTUN_LIB}"
)

# ─── WireGuard source files ───────────────────────────────────────────────────

set(ARTEMIS_WG_SOURCES
    src/wg/relayconf.cpp
    src/wg/wgconfig.cpp
    src/wg/relayreg.cpp
)

if(WIN32)
    list(APPEND ARTEMIS_WG_SOURCES src/wg/wgclient_win.cpp src/wg/displayinfo_win.cpp)
elseif(UNIX AND NOT APPLE)
    list(APPEND ARTEMIS_WG_SOURCES src/wg/wgclient_linux.cpp src/wg/displayinfo_linux.cpp)
elseif(APPLE)
    # macOS: future — use utun approach from DragonMoonlight if needed
    message(WARNING "Artemis WireGuard client not yet implemented for macOS")
endif()

# ─── Configuration function ───────────────────────────────────────────────────

function(artemis_wg_configure TARGET)
    target_sources(${TARGET} PRIVATE ${ARTEMIS_WG_SOURCES})

    target_include_directories(${TARGET} PRIVATE
        "${CMAKE_SOURCE_DIR}/src/wg"
        "${CMAKE_SOURCE_DIR}/deps/boringtun"  # boringtun_ffi.h
    )

    target_link_libraries(${TARGET} PRIVATE artemis_boringtun)

    # libcurl (already a Sunshine dependency)
    find_package(CURL REQUIRED)
    target_link_libraries(${TARGET} PRIVATE CURL::libcurl)

    if(WIN32)
        target_link_libraries(${TARGET} PRIVATE
            iphlpapi ws2_32 ntdll ole32
        )
    elseif(UNIX AND NOT APPLE)
        # pthread for std::thread on Linux
        target_link_libraries(${TARGET} PRIVATE pthread)
    endif()

    # Enable the WireGuard relay feature in Artemis source
    target_compile_definitions(${TARGET} PRIVATE ARTEMIS_RELAY_ENABLED=1)

    message(STATUS "Artemis: WireGuard relay client enabled for target '${TARGET}'")
endfunction()