1  # This file controls Flutter-level build steps. It should not be edited.
  2  cmake_minimum_required(VERSION 3.14)
  3  
  4  set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
  5  
  6  # Configuration provided via flutter tool.
  7  include(${EPHEMERAL_DIR}/generated_config.cmake)
  8  
  9  # TODO: Move the rest of this into files in ephemeral. See
 10  # https://github.com/flutter/flutter/issues/57146.
 11  set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
 12  
 13  # Set fallback configurations for older versions of the flutter tool.
 14  if (NOT DEFINED FLUTTER_TARGET_PLATFORM)
 15    set(FLUTTER_TARGET_PLATFORM "windows-x64")
 16  endif()
 17  
 18  # === Flutter Library ===
 19  set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
 20  
 21  # Published to parent scope for install step.
 22  set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
 23  set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
 24  set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
 25  set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
 26  
 27  list(APPEND FLUTTER_LIBRARY_HEADERS
 28    "flutter_export.h"
 29    "flutter_windows.h"
 30    "flutter_messenger.h"
 31    "flutter_plugin_registrar.h"
 32    "flutter_texture_registrar.h"
 33  )
 34  list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
 35  add_library(flutter INTERFACE)
 36  target_include_directories(flutter INTERFACE
 37    "${EPHEMERAL_DIR}"
 38  )
 39  target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
 40  add_dependencies(flutter flutter_assemble)
 41  
 42  # === Wrapper ===
 43  list(APPEND CPP_WRAPPER_SOURCES_CORE
 44    "core_implementations.cc"
 45    "standard_codec.cc"
 46  )
 47  list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
 48  list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
 49    "plugin_registrar.cc"
 50  )
 51  list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
 52  list(APPEND CPP_WRAPPER_SOURCES_APP
 53    "flutter_engine.cc"
 54    "flutter_view_controller.cc"
 55  )
 56  list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
 57  
 58  # Wrapper sources needed for a plugin.
 59  add_library(flutter_wrapper_plugin STATIC
 60    ${CPP_WRAPPER_SOURCES_CORE}
 61    ${CPP_WRAPPER_SOURCES_PLUGIN}
 62  )
 63  apply_standard_settings(flutter_wrapper_plugin)
 64  set_target_properties(flutter_wrapper_plugin PROPERTIES
 65    POSITION_INDEPENDENT_CODE ON)
 66  set_target_properties(flutter_wrapper_plugin PROPERTIES
 67    CXX_VISIBILITY_PRESET hidden)
 68  target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
 69  target_include_directories(flutter_wrapper_plugin PUBLIC
 70    "${WRAPPER_ROOT}/include"
 71  )
 72  add_dependencies(flutter_wrapper_plugin flutter_assemble)
 73  
 74  # Wrapper sources needed for the runner.
 75  add_library(flutter_wrapper_app STATIC
 76    ${CPP_WRAPPER_SOURCES_CORE}
 77    ${CPP_WRAPPER_SOURCES_APP}
 78  )
 79  apply_standard_settings(flutter_wrapper_app)
 80  target_link_libraries(flutter_wrapper_app PUBLIC flutter)
 81  target_include_directories(flutter_wrapper_app PUBLIC
 82    "${WRAPPER_ROOT}/include"
 83  )
 84  add_dependencies(flutter_wrapper_app flutter_assemble)
 85  
 86  # === Flutter tool backend ===
 87  # _phony_ is a non-existent file to force this command to run every time,
 88  # since currently there's no way to get a full input/output list from the
 89  # flutter tool.
 90  set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
 91  set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
 92  add_custom_command(
 93    OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
 94      ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
 95      ${CPP_WRAPPER_SOURCES_APP}
 96      ${PHONY_OUTPUT}
 97    COMMAND ${CMAKE_COMMAND} -E env
 98      ${FLUTTER_TOOL_ENVIRONMENT}
 99      "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
100        ${FLUTTER_TARGET_PLATFORM} $<CONFIG>
101    VERBATIM
102  )
103  add_custom_target(flutter_assemble DEPENDS
104    "${FLUTTER_LIBRARY}"
105    ${FLUTTER_LIBRARY_HEADERS}
106    ${CPP_WRAPPER_SOURCES_CORE}
107    ${CPP_WRAPPER_SOURCES_PLUGIN}
108    ${CPP_WRAPPER_SOURCES_APP}
109  )