cpp-utilities/cmake/modules/ShellCompletion.cmake

if(NOT BASIC_PROJECT_CONFIG_DONE)
    message(FATAL_ERROR "Before including the ShellCompletion module, the BasicConfig module must be included.")
endif()

option(SHELL_COMPLETION_ENABLED "controls whether shell completion is enabled in general" ON)
option(BASH_COMPLETION_ENABLED "controls whether shell completion for bash is enabled" ON)

if(SHELL_COMPLETION_ENABLED)
    # add bash completion (currently the only supported shell completion)
    if(BASH_COMPLETION_ENABLED)
        # find bash-completion.sh template
        include(TemplateFinder)
        find_template_file("bash-completion.sh" CPP_UTILITIES BASH_COMPLETION_TEMPLATE_FILE)

        # generate wrapper script for bash completion
        configure_file(
            "${BASH_COMPLETION_TEMPLATE_FILE}"
            "${CMAKE_CURRENT_BINARY_DIR}/bash-completion/completions/${META_PROJECT_NAME}"
            @ONLY
        )

        # add install target bash completion
        install(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bash-completion/completions"
                DESTINATION "share/bash-completion"
                COMPONENT bash-completion
        )
        if(NOT TARGET install-bash-completion)
            add_custom_target(install-bash-completion
                COMMAND "${CMAKE_COMMAND}" -DCMAKE_INSTALL_COMPONENT=bash-completion -P "${CMAKE_BINARY_DIR}/cmake_install.cmake"
            )
        endif()

        message(STATUS "Generating files for bash completion.")
    endif()
endif()