rustls-ffi 0.15.3

Rustls bindings for non-Rust languages
Documentation 
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include(ExternalProject)
set_directory_properties(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/rust)

if(FORCE_SYSTEM_RUSTLS)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(RUSTLS_FFI REQUIRED rustls)

    if(NOT RUSTLS_FFI_FOUND)
        message(FATAL_ERROR "System rustls-ffi required but not found")
    endif()

    message(STATUS "RUSTLS_FFI_INCLUDE_DIRS: ${RUSTLS_FFI_INCLUDE_DIRS}")
    message(STATUS "RUSTLS_FFI_LIBRARY_DIRS: ${RUSTLS_FFI_LIBRARY_DIRS}")
    message(STATUS "RUSTLS_FFI_LIBRARIES: ${RUSTLS_FFI_LIBRARIES}")
else()
    ExternalProject_Add(
        rustls-ffi
        DOWNLOAD_COMMAND ""
        CONFIGURE_COMMAND ""
        BUILD_COMMAND
            cargo capi build --locked ${CARGO_FEATURES}
            "$<IF:$<CONFIG:Release>,--release,-->"
        # Rely on cargo checking timestamps, rather than tell CMake where every
        # output is.
        BUILD_ALWAYS true
        INSTALL_COMMAND
            cargo capi install --libdir=lib --prefix=${CMAKE_BINARY_DIR}/rust
            --locked ${CARGO_FEATURES}
            "$<IF:$<CONFIG:Release>,--release,--debug>"
        # Run cargo test with --quiet because msbuild will treat the presence
        # of "error" in stdout as an error, and we have some test functions that
        # end in "_error". Quiet mode suppresses test names, so this is a
        # sufficient workaround.
        TEST_COMMAND
            cargo test --locked ${CARGO_FEATURES}
            "$<IF:$<CONFIG:Release>,--release,-->" --quiet
    )
endif()

add_custom_target(
    cbindgen
    # TODO(@cpu): I suspect this won't work on Windows :P
    COMMAND cbindgen > "src/rustls.h"
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
)

add_custom_target(connect-test DEPENDS client)

# For WIN32 when using dynamic linking we need to put the .dll
# in the search path for the binaries.
if(WIN32 AND DYN_LINK)
    add_custom_command(
        TARGET connect-test
        PRE_BUILD
        COMMAND
            ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/rust/bin/rustls.dll"
            "${CMAKE_BINARY_DIR}\\tests\\$<CONFIG>\\"
    )
endif()

add_custom_command(
    TARGET connect-test
    POST_BUILD
    COMMAND
        ${CMAKE_COMMAND} -E env RUSTLS_PLATFORM_VERIFIER=1
        "$<TARGET_FILE:client>" cloudflare.com 443 /
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
)

add_custom_target(integration-test DEPENDS client server)

if(WIN32 AND DYN_LINK)
    add_custom_command(
        TARGET integration-test
        PRE_BUILD
        COMMAND
            ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/rust/bin/rustls.dll"
            "${CMAKE_BINARY_DIR}\\tests\\$<CONFIG>\\"
    )
endif()

add_custom_command(
    TARGET integration-test
    POST_BUILD
    COMMAND
        ${CMAKE_COMMAND} -E env CLIENT_BINARY="$<TARGET_FILE:client>"
        ${CMAKE_COMMAND} -E env SERVER_BINARY="$<TARGET_FILE:server>" cargo test
        --locked ${CARGO_FEATURES} "$<IF:$<CONFIG:Release>,--release,>" --test
        client_server client_server_integration -- --ignored --exact
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
)

add_custom_target(ech-test DEPENDS client)

if(WIN32 AND DYN_LINK)
    add_custom_command(
        TARGET ech-test
        PRE_BUILD
        COMMAND
            ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/rust/bin/rustls.dll"
            "${CMAKE_BINARY_DIR}\\tests\\$<CONFIG>\\"
    )
endif()

add_custom_command(
    TARGET ech-test
    POST_BUILD
    COMMAND cargo run -p rustls-ffi-tools --bin ech_fetch
    COMMAND
        ${CMAKE_COMMAND} -E env RUSTLS_PLATFORM_VERIFIER=1 ${CMAKE_COMMAND} -E
        env ECH_CONFIG_LIST="research.cloudflare.com.ech.configs.bin"
        $<TARGET_FILE:client> cloudflare-ech.com 443 /cdn-cgi/trace
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
)

add_custom_target(prefer-pq-test DEPENDS client)

if(WIN32 AND DYN_LINK)
    add_custom_command(
        TARGET prefer-pq-test
        PRE_BUILD
        COMMAND
            ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/rust/bin/rustls.dll"
            "${CMAKE_BINARY_DIR}\\tests\\$<CONFIG>\\"
    )
endif()

add_custom_command(
    TARGET prefer-pq-test
    POST_BUILD
    COMMAND
        ${CMAKE_COMMAND} -E env RUSTLS_PLATFORM_VERIFIER=1 $<TARGET_FILE:client>
        pq.cloudflareresearch.com 443 /cdn-cgi/trace
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
)