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Encapsulate code gen in reusable cmake functions
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‎cmake/CMakeLists.txt

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@@ -10,4 +10,6 @@ write_basic_package_version_file(${PROJECT_NAME}-config-version.cmake COMPATIBIL
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install(FILES
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${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}-config.cmake
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${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
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${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}-functions.cmake
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${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}-update-schema-files.cmake
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DESTINATION ${GRAPHQL_INSTALL_CMAKE_DIR}/${PROJECT_NAME})

‎cmake/cppgraphqlgen-config.cmake

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@@ -5,7 +5,7 @@
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cppgraphqlgen
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-------------
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8-
The following import targets are created
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The following import targets are created:
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::
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@@ -15,8 +15,18 @@ The following import targets are created
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cppgraphqlgen::graphqlintrospection
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cppgraphqlgen::graphqljson
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cppgraphqlgen::schemagen
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cppgraphqlgen::clientgen
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The following functions are defined to help with code generation and build targets:
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::
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update_graphql_schema_files
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add_graphql_schema_target
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add_graphql_schema_no_introspection_target
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#]=======================================================================]
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include(CMakeFindDependencyMacro)
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find_package(Threads REQUIRED)
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include("${CMAKE_CURRENT_LIST_DIR}/cppgraphqlgen-targets.cmake")
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include("${CMAKE_CURRENT_LIST_DIR}/cppgraphqlgen-functions.cmake")

‎cmake/cppgraphqlgen-functions.cmake

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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License.
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get_filename_component(GRAPHQL_UPDATE_SCHEMA_FILES_SCRIPT
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"${CMAKE_CURRENT_LIST_DIR}/cppgraphqlgen-update-schema-files.cmake"
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ABSOLUTE)
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function(update_graphql_schema_files SCHEMA_TARGET SCHEMA_GRAPHQL SCHEMA_PREFIX SCHEMA_NAMESPACE)
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set_property(DIRECTORY APPEND
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PROPERTY CMAKE_CONFIGURE_DEPENDS ${SCHEMA_TARGET}_schema_files)
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# Collect optional arguments
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set(ADDITIONAL_SCHEMAGEN_ARGS "")
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if(ARGC GREATER 4)
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math(EXPR LAST_ARG "${ARGC} - 1")
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foreach(ARGN RANGE 4 ${LAST_ARG})
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set(NEXT_ARG "${ARGV${ARGN}}")
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list(APPEND ADDITIONAL_SCHEMAGEN_ARGS "${NEXT_ARG}")
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endforeach()
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endif()
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add_custom_command(
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OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${SCHEMA_TARGET}_schema_files
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COMMAND
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${CMAKE_COMMAND} "-DSCHEMA_SOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}"
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"-DSCHEMA_BINARY_DIR=${CMAKE_CURRENT_BINARY_DIR}"
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"-DSCHEMAGEN_PROGRAM=$<TARGET_FILE:cppgraphqlgen::schemagen>"
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"-DSCHEMA_TARGET=${SCHEMA_TARGET}" "-DSCHEMA_GRAPHQL=${SCHEMA_GRAPHQL}"
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"-DSCHEMA_PREFIX=${SCHEMA_PREFIX}" "-DSCHEMA_NAMESPACE=${SCHEMA_NAMESPACE}"
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"-DADDITIONAL_SCHEMAGEN_ARGS=${ADDITIONAL_SCHEMAGEN_ARGS}"
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-P ${GRAPHQL_UPDATE_SCHEMA_FILES_SCRIPT}
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DEPENDS ${SCHEMA_GRAPHQL} ${GRAPHQL_UPDATE_SCHEMA_FILES_SCRIPT}
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COMMENT "Generating ${SCHEMA_TARGET} GraphQL schema"
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VERBATIM)
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endfunction()
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function(add_graphql_schema_target SCHEMA_TARGET)
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add_custom_target(${SCHEMA_TARGET}_update_schema ALL
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${SCHEMA_TARGET}_schema_files)
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file(STRINGS ${SCHEMA_TARGET}_schema_files SCHEMA_FILES)
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add_library(${SCHEMA_TARGET}_schema STATIC ${SCHEMA_FILES})
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add_dependencies(${SCHEMA_TARGET}_schema ${SCHEMA_TARGET}_update_schema)
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target_include_directories(${SCHEMA_TARGET}_schema PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
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target_link_libraries(${SCHEMA_TARGET}_schema PUBLIC cppgraphqlgen::graphqlintrospection)
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endfunction()
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function(add_graphql_schema_no_introspection_target SCHEMA_NO_INTROSPECTION_TARGET)
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add_custom_target(${SCHEMA_NO_INTROSPECTION_TARGET}_update_schema ALL
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${SCHEMA_NO_INTROSPECTION_TARGET}_schema_files)
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file(STRINGS ${SCHEMA_NO_INTROSPECTION_TARGET}_schema_files SCHEMA_FILES)
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add_library(${SCHEMA_NO_INTROSPECTION_TARGET}_schema STATIC ${SCHEMA_FILES})
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add_dependencies(${SCHEMA_NO_INTROSPECTION_TARGET}_schema ${SCHEMA_NO_INTROSPECTION_TARGET}_update_schema)
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target_include_directories(${SCHEMA_NO_INTROSPECTION_TARGET}_schema PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
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target_link_libraries(${SCHEMA_NO_INTROSPECTION_TARGET}_schema PUBLIC cppgraphqlgen::graphqlservice)
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endfunction()

‎cmake/cppgraphqlgen-update-schema-files.cmake

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# Copyright (c) Microsoft Corporation. All rights reserved.
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# Licensed under the MIT License.
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# Normalize the filesystem paths
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get_filename_component(SCHEMA_SOURCE_DIR ${SCHEMA_SOURCE_DIR} ABSOLUTE)
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get_filename_component(SCHEMA_BINARY_DIR ${SCHEMA_BINARY_DIR} ABSOLUTE)
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get_filename_component(SCHEMAGEN_PROGRAM ${SCHEMAGEN_PROGRAM} ABSOLUTE)
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get_filename_component(SCHEMA_GRAPHQL "${SCHEMA_SOURCE_DIR}/${SCHEMA_GRAPHQL}" ABSOLUTE)
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file(MAKE_DIRECTORY ${SCHEMA_BINARY_DIR})
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# Cleanup all of the stale files in the binary directory
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file(GLOB PREVIOUS_FILES ${SCHEMA_BINARY_DIR}/*.h ${SCHEMA_BINARY_DIR}/*.cpp
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${SCHEMA_BINARY_DIR}/${SCHEMA_TARGET}_schema_files)
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foreach(PREVIOUS_FILE ${PREVIOUS_FILES})
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file(REMOVE ${PREVIOUS_FILE})
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endforeach()
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set(SCHEMAGEN_ARGS "--schema=${SCHEMA_GRAPHQL}" "--prefix=${SCHEMA_PREFIX}" "--namespace=${SCHEMA_NAMESPACE}")
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foreach(SCHEMAGEN_ARG ${ADDITIONAL_SCHEMAGEN_ARGS})
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list(APPEND SCHEMAGEN_ARGS ${SCHEMAGEN_ARG})
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endforeach()
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# Regenerate the sources in the binary directory
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execute_process(
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COMMAND ${SCHEMAGEN_PROGRAM} ${SCHEMAGEN_ARGS}
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OUTPUT_FILE ${SCHEMA_TARGET}_schema_files
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WORKING_DIRECTORY ${SCHEMA_BINARY_DIR})
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# Get the up-to-date list of files in the binary directory
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set(FILE_NAMES "")
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file(GLOB NEW_FILES ${SCHEMA_BINARY_DIR}/*.h ${SCHEMA_BINARY_DIR}/*.cpp)
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foreach(NEW_FILE ${NEW_FILES})
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get_filename_component(NEW_FILE ${NEW_FILE} NAME)
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list(APPEND FILE_NAMES "${NEW_FILE}")
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endforeach()
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# Don't update the files in the source directory if no files were generated in the binary directory.
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if(NOT FILE_NAMES)
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message(FATAL_ERROR "Schema generation failed!")
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endif()
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# Remove stale files in the source directory
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cmake_policy(SET CMP0057 NEW)
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file(GLOB OLD_FILES ${SCHEMA_SOURCE_DIR}/*.h ${SCHEMA_SOURCE_DIR}/*.cpp)
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foreach(OLD_FILE ${OLD_FILES})
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get_filename_component(OLD_FILE ${OLD_FILE} NAME)
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if(NOT OLD_FILE IN_LIST FILE_NAMES)
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file(REMOVE "${SCHEMA_SOURCE_DIR}/${OLD_FILE}")
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endif()
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endforeach()
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# Copy new and modified files from the binary directory to the source directory
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execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
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${SCHEMA_BINARY_DIR}/${SCHEMA_TARGET}_schema_files
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${NEW_FILES}
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${SCHEMA_SOURCE_DIR})

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