#
# Copyright (c) Contributors to the Open 3D Engine Project.
# For complete copyright and license terms please see the LICENSE at the root of this distribution.
#
# SPDX-License-Identifier: Apache-2.0 OR MIT
#
#

include(cmake/FileUtil.cmake)

set(CMAKE_INSTALL_MESSAGE NEVER) # Simplify messages to reduce output noise

define_property(TARGET PROPERTY LY_INSTALL_GENERATE_RUN_TARGET
    BRIEF_DOCS "Defines if a \"RUN\" targets should be created when installing this target Gem"
    FULL_DOCS [[
        Property which is set on targets that should generate a "RUN"
        target when installed. This \"RUN\" target helps to run the 
        binary from the installed location directly from the IDE.
    ]]
)

ly_set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME Core)

cmake_path(RELATIVE_PATH CMAKE_RUNTIME_OUTPUT_DIRECTORY BASE_DIRECTORY ${CMAKE_BINARY_DIR} OUTPUT_VARIABLE runtime_output_directory)
cmake_path(RELATIVE_PATH CMAKE_LIBRARY_OUTPUT_DIRECTORY BASE_DIRECTORY ${CMAKE_BINARY_DIR} OUTPUT_VARIABLE library_output_directory)
# Anywhere CMAKE_INSTALL_PREFIX is used, it has to be escaped so it is baked into the cmake_install.cmake script instead
# of baking the path. This is needed so `cmake --install --prefix <someprefix>` works regardless of the CMAKE_INSTALL_PREFIX
# used to generate the solution.
# CMAKE_INSTALL_PREFIX is still used when building the INSTALL target
set(install_output_folder "\${CMAKE_INSTALL_PREFIX}/${runtime_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>")


#! ly_setup_target: Setup the data needed to re-create the cmake target commands for a single target
function(ly_setup_target OUTPUT_CONFIGURED_TARGET ALIAS_TARGET_NAME absolute_target_source_dir)
    # De-alias target name
    ly_de_alias_target(${ALIAS_TARGET_NAME} TARGET_NAME)

    # Get the target source directory relative to the LY root folder
    ly_get_engine_relative_source_dir(${absolute_target_source_dir} relative_target_source_dir)

    # get the component ID.  if the property isn't set for the target, it will auto fallback to use CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
    get_property(install_component TARGET ${TARGET_NAME} PROPERTY INSTALL_COMPONENT)

    # All include directories marked PUBLIC or INTERFACE will be installed. We dont use PUBLIC_HEADER because in order to do that
    # we need to set the PUBLIC_HEADER property of the target for all the headers we are exporting. After doing that, installing the
    # headers end up in one folder instead of duplicating the folder structure of the public/interface include directory.
    # Instead, we install them with install(DIRECTORY)
    get_target_property(include_directories ${TARGET_NAME} INTERFACE_INCLUDE_DIRECTORIES)
    if (include_directories)
        unset(public_headers)
        foreach(include_directory ${include_directories})
            string(GENEX_STRIP ${include_directory} include_genex_expr)
            if(include_genex_expr STREQUAL include_directory) # only for cases where there are no generation expressions
                unset(current_public_headers)

                cmake_path(NORMAL_PATH include_directory)
                string(REGEX REPLACE "/$" "" include_directory "${include_directory}")
                cmake_path(IS_PREFIX LY_ROOT_FOLDER ${absolute_target_source_dir} NORMALIZE include_directory_child_of_o3de_root)
                if(NOT include_directory_child_of_o3de_root)
                    # Include directory is outside of the O3DE root folder ${LY_ROOT_FOLDER}.
                    # For the INSTALL step, the O3DE root folder must be a prefix of all include directories.
                    continue()
                endif()

                unset(rel_include_dir)
                cmake_path(RELATIVE_PATH include_directory BASE_DIRECTORY ${LY_ROOT_FOLDER} OUTPUT_VARIABLE rel_include_dir)
                cmake_path(APPEND rel_include_dir "..")
                cmake_path(NORMAL_PATH rel_include_dir OUTPUT_VARIABLE destination_dir)

                install(DIRECTORY ${include_directory}
                    DESTINATION ${destination_dir}
                    COMPONENT ${install_component}
                    FILES_MATCHING
                        PATTERN *.h
                        PATTERN *.hpp
                        PATTERN *.inl
                        PATTERN *.hxx
                        PATTERN *.jinja # LyAutoGen files
                )
            endif()
        endforeach()
    endif()

    # Get the output folders, archive is always the same, but runtime/library can be in subfolders defined per target
    cmake_path(RELATIVE_PATH CMAKE_ARCHIVE_OUTPUT_DIRECTORY BASE_DIRECTORY ${CMAKE_BINARY_DIR} OUTPUT_VARIABLE archive_output_directory)

    get_target_property(target_runtime_output_directory ${TARGET_NAME} RUNTIME_OUTPUT_DIRECTORY)
    if(target_runtime_output_directory)
        cmake_path(RELATIVE_PATH target_runtime_output_directory BASE_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY} OUTPUT_VARIABLE target_runtime_output_subdirectory)
    endif()

    get_target_property(target_library_output_directory ${TARGET_NAME} LIBRARY_OUTPUT_DIRECTORY)
    if(target_library_output_directory)
        cmake_path(RELATIVE_PATH target_library_output_directory BASE_DIRECTORY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} OUTPUT_VARIABLE target_library_output_subdirectory)
    endif()

    if(COMMAND ly_install_target_override)
        # Mac needs special handling because of a cmake issue
        ly_install_target_override(TARGET ${TARGET_NAME}
            ARCHIVE_DIR ${archive_output_directory}
            LIBRARY_DIR ${library_output_directory}
            RUNTIME_DIR ${runtime_output_directory}
            LIBRARY_SUBDIR ${target_library_output_subdirectory}
            RUNTIME_SUBDIR ${target_runtime_output_subdirectory}
        )
    else()
        install(
            TARGETS ${TARGET_NAME}
            ARCHIVE
                DESTINATION ${archive_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>
                COMPONENT ${install_component}
            LIBRARY
                DESTINATION ${library_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/${target_library_output_subdirectory}
                COMPONENT ${install_component}
            RUNTIME
                DESTINATION ${runtime_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/${target_runtime_output_subdirectory}
                COMPONENT ${install_component}
        )
    endif()

    # CMakeLists.txt file
    string(REGEX MATCH "(.*)::(.*)$" match ${ALIAS_TARGET_NAME})
    if(match)
        set(NAMESPACE_PLACEHOLDER "NAMESPACE ${CMAKE_MATCH_1}")
        set(NAME_PLACEHOLDER ${CMAKE_MATCH_2})
    else()
        set(NAMESPACE_PLACEHOLDER "")
        set(NAME_PLACEHOLDER ${TARGET_NAME})
    endif()
    get_target_property(should_create_helper ${TARGET_NAME} LY_INSTALL_GENERATE_RUN_TARGET)
    if(should_create_helper)
        set(NAME_PLACEHOLDER ${NAME_PLACEHOLDER}.Imported)
    endif()

    set(TARGET_TYPE_PLACEHOLDER "")
    get_target_property(target_type ${TARGET_NAME} TYPE)
    # Remove the _LIBRARY since we dont need to pass that to ly_add_targets
    string(REPLACE "_LIBRARY" "" TARGET_TYPE_PLACEHOLDER ${target_type})
    # For HEADER_ONLY libs we end up generating "INTERFACE" libraries, need to specify HEADERONLY instead
    string(REPLACE "INTERFACE" "HEADERONLY" TARGET_TYPE_PLACEHOLDER ${TARGET_TYPE_PLACEHOLDER})
    # In non-monolithic mode, gem targets are MODULE libraries, In monolithic mode gem targets are STATIC libraries
    set(GEM_LIBRARY_TYPES "MODULE" "STATIC")
    if(TARGET_TYPE_PLACEHOLDER IN_LIST GEM_LIBRARY_TYPES)
        get_target_property(gem_module ${TARGET_NAME} GEM_MODULE)
        if(gem_module)
            set(TARGET_TYPE_PLACEHOLDER "GEM_MODULE")
        endif()
    endif()

    string(REPEAT " " 12 PLACEHOLDER_INDENT)
    get_target_property(COMPILE_DEFINITIONS_PLACEHOLDER ${TARGET_NAME} INTERFACE_COMPILE_DEFINITIONS)
    if(COMPILE_DEFINITIONS_PLACEHOLDER)
        set(COMPILE_DEFINITIONS_PLACEHOLDER "${PLACEHOLDER_INDENT}${COMPILE_DEFINITIONS_PLACEHOLDER}")
        list(JOIN COMPILE_DEFINITIONS_PLACEHOLDER "\n${PLACEHOLDER_INDENT}" COMPILE_DEFINITIONS_PLACEHOLDER)
    else()
        unset(COMPILE_DEFINITIONS_PLACEHOLDER)
    endif()

    # Includes need additional processing to add the install root
    if(include_directories)
        foreach(include ${include_directories})
            string(GENEX_STRIP ${include} include_genex_expr)
            if(include_genex_expr STREQUAL include) # only for cases where there are no generation expressions
                # Make the include path relative to the source dir where the target will be declared
                cmake_path(RELATIVE_PATH include BASE_DIRECTORY ${absolute_target_source_dir} OUTPUT_VARIABLE target_include)
                string(APPEND INCLUDE_DIRECTORIES_PLACEHOLDER "${PLACEHOLDER_INDENT}${target_include}\n")
            endif()
        endforeach()
    endif()

    string(REPEAT " " 8 PLACEHOLDER_INDENT)
    get_target_property(RUNTIME_DEPENDENCIES_PLACEHOLDER ${TARGET_NAME} MANUALLY_ADDED_DEPENDENCIES)
    if(RUNTIME_DEPENDENCIES_PLACEHOLDER) # not found properties return the name of the variable with a "-NOTFOUND" at the end, here we set it to empty if not found
        set(RUNTIME_DEPENDENCIES_PLACEHOLDER "${PLACEHOLDER_INDENT}${RUNTIME_DEPENDENCIES_PLACEHOLDER}")
        list(JOIN RUNTIME_DEPENDENCIES_PLACEHOLDER "\n${PLACEHOLDER_INDENT}" RUNTIME_DEPENDENCIES_PLACEHOLDER)
    else()
        unset(RUNTIME_DEPENDENCIES_PLACEHOLDER)
    endif()

    string(REPEAT " " 12 PLACEHOLDER_INDENT)
    get_target_property(inteface_build_dependencies_props ${TARGET_NAME} INTERFACE_LINK_LIBRARIES)
    unset(INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER)
    if(inteface_build_dependencies_props)
        foreach(build_dependency ${inteface_build_dependencies_props})
            # Skip wrapping produced when targets are not created in the same directory
            if(NOT ${build_dependency} MATCHES "^::@")
                list(APPEND INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER "${PLACEHOLDER_INDENT}${build_dependency}")
            endif()
        endforeach()
    endif()
    # We also need to pass the private link libraries since we will use that to generate the runtime dependencies
    get_target_property(private_build_dependencies_props ${TARGET_NAME} LINK_LIBRARIES)
    if(private_build_dependencies_props)
        foreach(build_dependency ${private_build_dependencies_props})
            # Skip wrapping produced when targets are not created in the same directory
            if(NOT ${build_dependency} MATCHES "^::@")
                list(APPEND INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER "${PLACEHOLDER_INDENT}${build_dependency}")
            endif()
        endforeach()
    endif()
    list(REMOVE_DUPLICATES INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER)
    list(JOIN INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER "\n" INTERFACE_BUILD_DEPENDENCIES_PLACEHOLDER)

    string(REPEAT " " 8 PLACEHOLDER_INDENT)
    # If a target has an LY_PROJECT_NAME property, forward that property to new target
    get_target_property(target_project_association ${TARGET_NAME} LY_PROJECT_NAME)
    if(target_project_association)
        list(APPEND TARGET_PROPERTIES_PLACEHOLDER "${PLACEHOLDER_INDENT}LY_PROJECT_NAME ${target_project_association}")
    endif()

    # If the target is an executable/application, add a custom target so we can debug the target in project-centric workflow
    if(should_create_helper)
        string(REPLACE ".Imported" "" RUN_TARGET_NAME ${NAME_PLACEHOLDER})
        set(target_types_with_debugging_helper EXECUTABLE APPLICATION)
        if(NOT target_type IN_LIST target_types_with_debugging_helper)
            message(FATAL_ERROR "Cannot generate a RUN target for ${TARGET_NAME}, type is ${target_type}")
        endif()
        set(TARGET_RUN_HELPER
"add_custom_target(${RUN_TARGET_NAME})
set_target_properties(${RUN_TARGET_NAME} PROPERTIES 
    FOLDER \"O3DE_SDK\"
    VS_DEBUGGER_COMMAND \$<GENEX_EVAL:\$<TARGET_PROPERTY:${NAME_PLACEHOLDER},IMPORTED_LOCATION>>
    VS_DEBUGGER_COMMAND_ARGUMENTS \"--project-path=\${LY_DEFAULT_PROJECT_PATH}\"
)"
)
    endif()

    # Config file
    set(target_file_contents "# Generated by O3DE install\n\n")
    if(NOT target_type STREQUAL INTERFACE_LIBRARY)

        unset(target_location)
        set(runtime_types EXECUTABLE APPLICATION)
        if(target_type IN_LIST runtime_types)
            set(target_location "\${LY_ROOT_FOLDER}/${runtime_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/${target_runtime_output_subdirectory}/$<TARGET_FILE_NAME:${TARGET_NAME}>")
        elseif(target_type STREQUAL MODULE_LIBRARY)
            set(target_location "\${LY_ROOT_FOLDER}/${library_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/${target_library_output_subdirectory}/$<TARGET_FILE_NAME:${TARGET_NAME}>")
        elseif(target_type STREQUAL SHARED_LIBRARY)
            string(APPEND target_file_contents 
"set_property(TARGET ${NAME_PLACEHOLDER} 
    APPEND_STRING PROPERTY IMPORTED_IMPLIB
        $<$<CONFIG:$<CONFIG>$<ANGLE-R>:\"\${LY_ROOT_FOLDER}/${archive_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/$<TARGET_LINKER_FILE_NAME:${TARGET_NAME}>\"$<ANGLE-R>
)
")
            string(APPEND target_file_contents 
"set_property(TARGET ${NAME_PLACEHOLDER} 
    PROPERTY IMPORTED_IMPLIB_$<UPPER_CASE:$<CONFIG>> 
        \"\${LY_ROOT_FOLDER}/${archive_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/$<TARGET_LINKER_FILE_NAME:${TARGET_NAME}>\"
)
")
            set(target_location "\${LY_ROOT_FOLDER}/${library_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/${target_library_output_subdirectory}/$<TARGET_FILE_NAME:${TARGET_NAME}>")
        else() # STATIC_LIBRARY, OBJECT_LIBRARY, INTERFACE_LIBRARY
            set(target_location "\${LY_ROOT_FOLDER}/${archive_output_directory}/${PAL_PLATFORM_NAME}/$<CONFIG>/$<TARGET_LINKER_FILE_NAME:${TARGET_NAME}>")
        endif()

        if(target_location)
            string(APPEND target_file_contents
"set_property(TARGET ${NAME_PLACEHOLDER}
    APPEND_STRING PROPERTY IMPORTED_LOCATION
        $<$<CONFIG:$<CONFIG>$<ANGLE-R>:${target_location}$<ANGLE-R>
)
set_property(TARGET ${NAME_PLACEHOLDER}
    PROPERTY IMPORTED_LOCATION_$<UPPER_CASE:$<CONFIG>>
        ${target_location}
)
")
        endif()
    endif()

    set(target_install_source_dir ${CMAKE_CURRENT_BINARY_DIR}/install/${relative_target_source_dir})
    file(GENERATE OUTPUT "${target_install_source_dir}/${NAME_PLACEHOLDER}_$<CONFIG>.cmake" CONTENT "${target_file_contents}")
    install(FILES "${target_install_source_dir}/${NAME_PLACEHOLDER}_$<CONFIG>.cmake"
        DESTINATION ${relative_target_source_dir}
        COMPONENT ${install_component}
    )

    # Since a CMakeLists.txt could contain multiple targets, we generate it in a folder per target
    ly_file_read(${LY_ROOT_FOLDER}/cmake/install/InstalledTarget.in target_cmakelists_template)
    string(CONFIGURE ${target_cmakelists_template} output_cmakelists_data @ONLY)
    set(${OUTPUT_CONFIGURED_TARGET} ${output_cmakelists_data} PARENT_SCOPE)
endfunction()


#! ly_setup_subdirectories: setups all targets on a per directory basis
function(ly_setup_subdirectories)
    get_property(all_subdirectories GLOBAL PROPERTY LY_ALL_TARGET_DIRECTORIES)
    foreach(target_subdirectory IN LISTS all_subdirectories)
        ly_setup_subdirectory(${target_subdirectory})
    endforeach()
endfunction()


#! ly_setup_subdirectory: setup all targets in the subdirectory
function(ly_setup_subdirectory absolute_target_source_dir)
    ly_get_engine_relative_source_dir(${absolute_target_source_dir} relative_target_source_dir)

    # The builtin BUILDSYSTEM_TARGETS property isn't being used here as that returns the de-alised
    # TARGET and we need the alias namespace for recreating the CMakeLists.txt in the install layout
    get_property(ALIAS_TARGETS_NAME DIRECTORY ${absolute_target_source_dir} PROPERTY LY_DIRECTORY_TARGETS)
    foreach(ALIAS_TARGET_NAME IN LISTS ALIAS_TARGETS_NAME)
        ly_setup_target(configured_target ${ALIAS_TARGET_NAME} ${absolute_target_source_dir})
        string(APPEND all_configured_targets "${configured_target}")
    endforeach()

    ly_setup_subdirectory_create_alias("${absolute_target_source_dir}" CREATE_ALIASES_PLACEHOLDER)
    ly_setup_subdirectory_set_gem_variant_to_load("${absolute_target_source_dir}" GEM_VARIANT_TO_LOAD_PLACEHOLDER)
    ly_setup_subdirectory_enable_gems("${absolute_target_source_dir}" ENABLE_GEMS_PLACEHOLDER)

    ly_file_read(${LY_ROOT_FOLDER}/cmake/install/Copyright.in cmake_copyright_comment)

    # Initialize the target install source directory to path underneath the current binary directory
    set(target_install_source_dir ${CMAKE_CURRENT_BINARY_DIR}/install/${relative_target_source_dir})
    # Write out all the aggregated ly_add_target function calls and the final ly_create_alias() calls to the target CMakeLists.txt
    file(WRITE ${target_install_source_dir}/CMakeLists.txt
        "${cmake_copyright_comment}"
        "${all_configured_targets}"
        "\n"
        "${CREATE_ALIASES_PLACEHOLDER}"
        "${GEM_VARIANT_TO_LOAD_PLACEHOLDER}"
        "${ENABLE_GEMS_PLACEHOLDER}"
    )

    # get the component ID. if the property isn't set for the directory, it will auto fallback to use CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
    get_property(install_component DIRECTORY ${absolute_target_source_dir} PROPERTY INSTALL_COMPONENT)

    install(FILES "${target_install_source_dir}/CMakeLists.txt"
        DESTINATION ${relative_target_source_dir}
        COMPONENT ${install_component}
    )

endfunction()

#! ly_setup_o3de_install: orchestrates the installation of the different parts. This is the entry point from the root CMakeLists.txt
function(ly_setup_o3de_install)

    ly_setup_subdirectories()
    ly_setup_cmake_install()
    ly_setup_runtime_dependencies()
    ly_setup_assets()

    # Misc
    install(FILES
        ${LY_ROOT_FOLDER}/ctest_pytest.ini
        ${LY_ROOT_FOLDER}/LICENSE.txt
        ${LY_ROOT_FOLDER}/README.md
        DESTINATION .
    )

endfunction()

#! ly_setup_cmake_install: install the "cmake" folder
function(ly_setup_cmake_install)

    install(DIRECTORY "${LY_ROOT_FOLDER}/cmake"
        DESTINATION .
        PATTERN "__pycache__" EXCLUDE
        REGEX "Findo3de.cmake" EXCLUDE
        REGEX "Platform\/.*\/BuiltInPackages_.*\.cmake" EXCLUDE
    )

    # Transform the LY_EXTERNAL_SUBDIRS list into a json array
    set(indent "        ")
    foreach(external_subdir ${LY_EXTERNAL_SUBDIRS})
        cmake_path(RELATIVE_PATH external_subdir BASE_DIRECTORY ${LY_ROOT_FOLDER} OUTPUT_VARIABLE engine_rel_external_subdir)
        list(APPEND relative_external_subdirs "\"${engine_rel_external_subdir}\"")
    endforeach()
    list(JOIN relative_external_subdirs ",\n${indent}" LY_INSTALL_EXTERNAL_SUBDIRS)

    # Read the "templates" key from the source engine.json
    o3de_read_json_array(engine_templates ${LY_ROOT_FOLDER}/engine.json "templates")
    foreach(template_path ${engine_templates})
        list(APPEND relative_templates "\"${template_path}\"")
    endforeach()
    list(JOIN relative_templates ",\n${indent}" LY_INSTALL_TEMPLATES)

    configure_file(${LY_ROOT_FOLDER}/cmake/install/engine.json.in ${CMAKE_CURRENT_BINARY_DIR}/cmake/engine.json @ONLY)

    install(
        FILES
            "${LY_ROOT_FOLDER}/CMakeLists.txt"
            "${CMAKE_CURRENT_BINARY_DIR}/cmake/engine.json"
        DESTINATION .
    )

    # Collect all Find files that were added with ly_add_external_target_path
    unset(additional_find_files)
    get_property(additional_module_paths GLOBAL PROPERTY LY_ADDITIONAL_MODULE_PATH)
    foreach(additional_module_path ${additional_module_paths})
        unset(find_files)
        file(GLOB find_files "${additional_module_path}/Find*.cmake")
        list(APPEND additional_find_files "${find_files}")
    endforeach()
    install(FILES ${additional_find_files}
        DESTINATION cmake/3rdParty
    )

    # Findo3de.cmake file: we generate a different Findo3de.camke file than the one we have in cmake. This one is going to expose all
    # targets that are pre-built
    unset(FIND_PACKAGES_PLACEHOLDER)

    # Add to the FIND_PACKAGES_PLACEHOLDER all directories in which ly_add_target were called in
    get_property(all_subdirectories GLOBAL PROPERTY LY_ALL_TARGET_DIRECTORIES)
    foreach(target_subdirectory IN LISTS all_subdirectories)
        cmake_path(RELATIVE_PATH target_subdirectory BASE_DIRECTORY ${LY_ROOT_FOLDER} OUTPUT_VARIABLE relative_target_subdirectory)
        string(APPEND FIND_PACKAGES_PLACEHOLDER "    add_subdirectory(${relative_target_subdirectory})\n")
    endforeach()

    configure_file(${LY_ROOT_FOLDER}/cmake/install/Findo3de.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/cmake/Findo3de.cmake @ONLY)
    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/cmake/Findo3de.cmake"
        DESTINATION cmake
    )

    # BuiltInPackage_<platform>.cmake: since associations could happen in any cmake file across the engine. We collect
    # all the associations in ly_associate_package and then generate them into BuiltInPackages_<platform>.cmake. This
    # will consolidate all associations in one file
    get_property(all_package_names GLOBAL PROPERTY LY_PACKAGE_NAMES)
    set(builtinpackages "# Generated by O3DE install\n\n")
    foreach(package_name IN LISTS all_package_names)
        get_property(package_hash GLOBAL PROPERTY LY_PACKAGE_HASH_${package_name})
        get_property(targets GLOBAL PROPERTY LY_PACKAGE_TARGETS_${package_name})
        string(APPEND builtinpackages "ly_associate_package(PACKAGE_NAME ${package_name} TARGETS ${targets} PACKAGE_HASH ${package_hash})\n")
    endforeach()

    set(pal_builtin_file ${CMAKE_CURRENT_BINARY_DIR}/cmake/3rdParty/Platform/${PAL_PLATFORM_NAME}/BuiltInPackages_${PAL_PLATFORM_NAME_LOWERCASE}.cmake)
    file(GENERATE OUTPUT ${pal_builtin_file}
        CONTENT ${builtinpackages}
    )
    install(FILES "${pal_builtin_file}"
        DESTINATION cmake/3rdParty/Platform/${PAL_PLATFORM_NAME}
    )

endfunction()

#! ly_setup_runtime_dependencies: install runtime dependencies
function(ly_setup_runtime_dependencies)

    # Common functions used by the bellow code
    if(COMMAND ly_install_code_function_override)
        ly_install_code_function_override()
    else()
        install(CODE
"function(ly_copy source_file target_directory)
    file(COPY \"\${source_file}\" DESTINATION \"\${target_directory}\" FILE_PERMISSIONS ${LY_COPY_PERMISSIONS})
endfunction()"
        )
    endif()

    unset(runtime_commands)
    get_property(all_targets GLOBAL PROPERTY LY_ALL_TARGETS)
    foreach(alias_target IN LISTS all_targets)
        ly_de_alias_target(${alias_target} target)

        # Exclude targets that dont produce runtime outputs
        get_target_property(target_type ${target} TYPE)
        if(NOT target_type IN_LIST LY_TARGET_TYPES_WITH_RUNTIME_OUTPUTS)
            continue()
        endif()

        get_target_property(target_runtime_output_directory ${target} RUNTIME_OUTPUT_DIRECTORY)
        if(target_runtime_output_directory)
            cmake_path(RELATIVE_PATH target_runtime_output_directory BASE_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY} OUTPUT_VARIABLE target_runtime_output_subdirectory)
        endif()

        # runtime dependencies that need to be copied to the output
        set(target_file_dir "${install_output_folder}/${target_runtime_output_subdirectory}")
        ly_get_runtime_dependencies(runtime_dependencies ${target})
        foreach(runtime_dependency ${runtime_dependencies})
            unset(runtime_command)
            unset(runtime_depend) # unused, but required to be passed to ly_get_runtime_dependency_command
            ly_get_runtime_dependency_command(runtime_command runtime_depend ${runtime_dependency})
            string(CONFIGURE "${runtime_command}" runtime_command @ONLY)
            list(APPEND runtime_commands ${runtime_command})
        endforeach()

    endforeach()

    list(REMOVE_DUPLICATES runtime_commands)
    list(JOIN runtime_commands "    " runtime_commands_str) # the spaces are just to see the right identation in the cmake_install.cmake file
    install(CODE "${runtime_commands_str}")

endfunction()

#! ly_setup_assets: install asset directories required by the engine
function(ly_setup_assets)

    # Gem Source Assets and configuration files
    # Find all gem directories relative to the CMake Source Dir

    # This first loop is to filter out transient and .gitignore'd folders that should be added to
    # the install layout from the root directory. Such as <external-subdirectory-root>/Cache.
    # This is also done to avoid globbing thousands of files in subdirectories that shouldn't
    # be processed.
    foreach(gem_candidate_dir IN LISTS LY_EXTERNAL_SUBDIRS LY_PROJECTS)
        file(REAL_PATH ${gem_candidate_dir} gem_candidate_dir BASE_DIRECTORY ${LY_ROOT_FOLDER})
        # Don't recurse immediately in order to exclude transient source artifacts
        file(GLOB
            external_subdir_files
            LIST_DIRECTORIES TRUE
            "${gem_candidate_dir}/*"
        )
        # Exclude transient artifacts that shouldn't be copied to the install layout
        list(FILTER external_subdir_files EXCLUDE REGEX "/([Bb]uild|[Cc]ache|[Uu]ser)$")
        # Storing a "mapping" of gem candidate directories, to external_subdirectory files using
        # a DIRECTORY property for the "value" and the GLOBAL property for the "key"
        set_property(DIRECTORY ${gem_candidate_dir} APPEND PROPERTY directory_filtered_asset_paths "${external_subdir_files}")
        set_property(GLOBAL APPEND PROPERTY global_gem_candidate_dirs_prop ${gem_candidate_dir})
    endforeach()

    # Iterate over each gem candidate directories and read populate a directory property
    # containing the files to copy over
    get_property(gem_candidate_dirs GLOBAL PROPERTY global_gem_candidate_dirs_prop)
    foreach(gem_candidate_dir IN LISTS gem_candidate_dirs)
        get_property(filtered_asset_paths DIRECTORY ${gem_candidate_dir} PROPERTY directory_filtered_asset_paths)
        ly_get_last_path_segment_concat_sha256(${gem_candidate_dir} last_gem_root_path_segment)
        # Check if the gem is a subdirectory of the engine
        cmake_path(IS_PREFIX LY_ROOT_FOLDER ${gem_candidate_dir} is_gem_subdirectory_of_engine)
        
        # At this point the filtered_assets_paths contains the list of all directories and files
        # that are non-excluded candidates that can be scanned for target directories and files
        # to copy over to the install layout
        foreach(filtered_asset_path IN LISTS filtered_asset_paths)
            if(IS_DIRECTORY ${filtered_asset_path})
                file(GLOB_RECURSE
                    recurse_assets_paths
                    LIST_DIRECTORIES TRUE
                    "${filtered_asset_path}/*"
                )
                set(gem_file_paths ${recurse_assets_paths})
                # Make sure to prepend the current path iteration to the gem_dirs_path to filter
                set(gem_dir_paths ${filtered_asset_path} ${recurse_assets_paths})

                # Gather directories to copy over
                # Currently only the Assets, Registry and Config directories are copied over
                list(FILTER gem_dir_paths INCLUDE REGEX "/(Assets|Registry|Config|Editor/Scripts)$")
                set_property(DIRECTORY ${gem_candidate_dir} APPEND PROPERTY gems_assets_paths ${gem_dir_paths})
            else()
                set(gem_file_paths ${filtered_asset_path})
            endif()

            # Gather files to copy over
            # Currently only the gem.json file is copied over
            list(FILTER gem_file_paths INCLUDE REGEX "/(gem.json|preview.png)$")
            set_property(DIRECTORY ${gem_candidate_dir} APPEND PROPERTY gems_assets_paths "${gem_file_paths}")
        endforeach()

        # gem directories and files to install
        get_property(gems_assets_paths DIRECTORY ${gem_candidate_dir} PROPERTY gems_assets_paths)
        foreach(gem_absolute_path IN LISTS gems_assets_paths)
            if(is_gem_subdirectory_of_engine)
                cmake_path(RELATIVE_PATH gem_absolute_path BASE_DIRECTORY ${LY_ROOT_FOLDER} OUTPUT_VARIABLE gem_install_dest_dir)
            else()
                # The gem resides outside of the LY_ROOT_FOLDER, so the destination is made relative to the
                # gem candidate directory and placed under the "External" directory"
                # directory
                cmake_path(RELATIVE_PATH gem_absolute_path BASE_DIRECTORY ${gem_candidate_dir} OUTPUT_VARIABLE gem_relative_path)
                unset(gem_install_dest_dir)
                cmake_path(APPEND gem_install_dest_dir "External" ${last_gem_root_path_segment} ${gem_relative_path})
            endif()

            cmake_path(GET gem_install_dest_dir PARENT_PATH gem_install_dest_dir)
            if (NOT gem_install_dest_dir)
                cmake_path(SET gem_install_dest_dir .)
            endif()
            if(IS_DIRECTORY ${gem_absolute_path})
                install(DIRECTORY "${gem_absolute_path}" DESTINATION ${gem_install_dest_dir})
            elseif (EXISTS ${gem_absolute_path})
                install(FILES ${gem_absolute_path} DESTINATION ${gem_install_dest_dir})
            endif()
        endforeach()

    endforeach()

endfunction()


#! ly_setup_subdirectory_create_alias: Replicates the call to the `ly_create_alias` function
#! within the generated CMakeLists.txt in the same relative install layout directory
function(ly_setup_subdirectory_create_alias absolute_target_source_dir output_script)
    # Replicate the create_alias() calls made in the SOURCE_DIR into the generated CMakeLists.txt
    string(JOIN "\n" create_alias_template
        "if(NOT TARGET @alias_name@)"
        "   ly_create_alias(@create_alias_args@)"
        "endif()"
        "")

    unset(${output_script} PARENT_SCOPE)
    get_property(create_alias_args_list DIRECTORY ${absolute_target_source_dir} PROPERTY LY_CREATE_ALIAS_ARGUMENTS)
    foreach(create_alias_args IN LISTS create_alias_args_list)
        # Create a list out of the comma separated arguments and store it into the same variable
        string(REPLACE "," ";" create_alias_args ${create_alias_args})
        # The first argument of the create alias argument list is the ALIAS NAME so pop it from the list
        # It is used to protect against registering the same alias twice
        list(POP_FRONT create_alias_args alias_name)
        string(CONFIGURE "${create_alias_template}" create_alias_command @ONLY)
        string(APPEND create_alias_calls ${create_alias_command})
    endforeach()
    set(${output_script} ${create_alias_calls} PARENT_SCOPE)
endfunction()

#! ly_setup_subdirectory_set_gem_variant_to_load: Replicates the call to the `ly_set_gem_variant_to_load` function
#! within the generated CMakeLists.txt in the same relative install layout directory
function(ly_setup_subdirectory_set_gem_variant_to_load absolute_target_source_dir output_script)
    # Replicate the ly_set_gem_variant_to_load() calls made in the SOURCE_DIR for into the generated CMakeLists.txt
    set(set_gem_variant_args_template "ly_set_gem_variant_to_load(@set_gem_variant_args@)\n")

    unset(${output_script} PARENT_SCOPE)
    get_property(set_gem_variant_args_lists DIRECTORY ${absolute_target_source_dir} PROPERTY LY_SET_GEM_VARIANT_TO_LOAD_ARGUMENTS)
    foreach(set_gem_variant_args IN LISTS set_gem_variant_args_lists)
        string(CONFIGURE "${set_gem_variant_args_template}" set_gem_variant_to_load_command @ONLY)
        string(APPEND set_gem_variant_calls ${set_gem_variant_to_load_command})
    endforeach()
    set(${output_script} ${set_gem_variant_calls} PARENT_SCOPE)
endfunction()

#! ly_setup_subdirectory_enable_gems: Replicates the call to the `ly_enable_gems` function
#! within the generated CMakeLists.txt in the same relative install layout directory
function(ly_setup_subdirectory_enable_gems absolute_target_source_dir output_script)
    # Replicate the ly_set_gem_variant_to_load() calls made in the SOURCE_DIR into the generated CMakeLists.txt
    set(enable_gems_template "ly_enable_gems(@enable_gems_args@)\n")

    unset(${output_script} PARENT_SCOPE)
    get_property(enable_gems_args_list DIRECTORY ${absolute_target_source_dir} PROPERTY LY_ENABLE_GEMS_ARGUMENTS)
    foreach(enable_gems_args IN LISTS enable_gems_args_list)
        string(CONFIGURE "${enable_gems_template}" enable_gems_command @ONLY)
        string(APPEND enable_gems_calls ${enable_gems_command})
    endforeach()
    set(${output_script} ${enable_gems_calls} PARENT_SCOPE)
endfunction()