cmake_minimum_required(VERSION 3.22)

project(Corrosion

    # Official releases will be major.minor.patch. When the `tweak` field is

    # set it indicates that we are on a commit, that is not a officially

    # tagged release. Users don't need to care about this, it is mainly to

    # clearly see in configure logs which version was used, without needing to

    # rely on `git`, since Corrosion may be installed or otherwise packaged.

    VERSION 0.99.99 # 1.0-pre-release

    LANGUAGES NONE

    HOMEPAGE_URL "https://corrosion-rs.github.io/corrosion/"

)

# ==== Corrosion Configuration ====

option(

    CORROSION_BUILD_TESTS

    "Build Corrosion test project"

    ${PROJECT_IS_TOP_LEVEL}

)

if (PROJECT_IS_TOP_LEVEL)

    # We need to enable a language for corrosions test to work.

    # For projects using corrosion this is not needed

    enable_language(C)

endif()

# This little bit self-hosts the Corrosion toolchain to build the generator

# tool.

#

# It is strongly encouraged to install Corrosion separately and use

# `find_package(Corrosion REQUIRED)` instead if that works with your workflow.

option(CORROSION_INSTALL_ONLY "Only add rules for installing Corrosion itself." OFF)

if (NOT CORROSION_INSTALL_ONLY)

    list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

    include(Corrosion)

endif()

# Testing

if (CORROSION_BUILD_TESTS)

    include(CTest)

    add_subdirectory(test)

endif()

# If Corrosion is a subdirectory, do not enable its install code

if (NOT PROJECT_IS_TOP_LEVEL)

    return()

endif()

# Installation

include(GNUInstallDirs)

# Generate the Config file

include(CMakePackageConfigHelpers)

configure_package_config_file(

    cmake/CorrosionConfig.cmake.in CorrosionConfig.cmake

    INSTALL_DESTINATION

        "${CMAKE_INSTALL_FULL_LIBDIR}/cmake/Corrosion"

)

write_basic_package_version_file(

    "${CMAKE_CURRENT_BINARY_DIR}/CorrosionConfigVersion.cmake"

    VERSION ${PROJECT_VERSION}

    COMPATIBILITY

        SameMajorVersion

    ARCH_INDEPENDENT

)

install(

    FILES

        "${CMAKE_CURRENT_BINARY_DIR}/CorrosionConfig.cmake"

        "${CMAKE_CURRENT_BINARY_DIR}/CorrosionConfigVersion.cmake"

    DESTINATION

        "${CMAKE_INSTALL_FULL_LIBDIR}/cmake/Corrosion"

)

# These CMake scripts are needed both for the install and as a subdirectory

install(

    FILES

        cmake/Corrosion.cmake

        cmake/CorrosionGenerator.cmake

        cmake/FindRust.cmake

    DESTINATION

        "${CMAKE_INSTALL_FULL_DATADIR}/cmake"

)