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  1# This file controls Flutter-level build steps. It should not be edited.
  2cmake_minimum_required(VERSION 3.14)
  3
  4set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
  5
  6# Configuration provided via flutter tool.
  7include("${EPHEMERAL_DIR}/generated_config.cmake" OPTIONAL RESULT_VARIABLE _generated_config_included)
  8if(NOT _generated_config_included)
  9  message(STATUS "generated_config.cmake not found at ${EPHEMERAL_DIR}; run 'flutter pub get' or 'flutter build' to generate it.")
 10endif()
 11
 12# TODO: Move the rest of this into files in ephemeral. See
 13# https://github.com/flutter/flutter/issues/57146.
 14set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
 15
 16# Set fallback configurations for older versions of the flutter tool.
 17if (NOT DEFINED FLUTTER_TARGET_PLATFORM)
 18  set(FLUTTER_TARGET_PLATFORM "windows-x64")
 19endif()
 20
 21# === Flutter Library ===
 22set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
 23
 24# Published to parent scope for install step.
 25set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
 26set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
 27set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
 28set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
 29
 30list(APPEND FLUTTER_LIBRARY_HEADERS
 31  "flutter_export.h"
 32  "flutter_windows.h"
 33  "flutter_messenger.h"
 34  "flutter_plugin_registrar.h"
 35  "flutter_texture_registrar.h"
 36)
 37list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
 38add_library(flutter INTERFACE)
 39target_include_directories(flutter INTERFACE
 40  "${EPHEMERAL_DIR}"
 41)
 42target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
 43add_dependencies(flutter flutter_assemble)
 44
 45# === Wrapper ===
 46list(APPEND CPP_WRAPPER_SOURCES_CORE
 47  "core_implementations.cc"
 48  "standard_codec.cc"
 49)
 50list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
 51list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
 52  "plugin_registrar.cc"
 53)
 54list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
 55list(APPEND CPP_WRAPPER_SOURCES_APP
 56  "flutter_engine.cc"
 57  "flutter_view_controller.cc"
 58)
 59list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
 60
 61# Wrapper sources needed for a plugin.
 62add_library(flutter_wrapper_plugin STATIC
 63  ${CPP_WRAPPER_SOURCES_CORE}
 64  ${CPP_WRAPPER_SOURCES_PLUGIN}
 65)
 66apply_standard_settings(flutter_wrapper_plugin)
 67set_target_properties(flutter_wrapper_plugin PROPERTIES
 68  POSITION_INDEPENDENT_CODE ON)
 69set_target_properties(flutter_wrapper_plugin PROPERTIES
 70  CXX_VISIBILITY_PRESET hidden)
 71target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
 72target_include_directories(flutter_wrapper_plugin PUBLIC
 73  "${WRAPPER_ROOT}/include"
 74)
 75add_dependencies(flutter_wrapper_plugin flutter_assemble)
 76
 77# Wrapper sources needed for the runner.
 78add_library(flutter_wrapper_app STATIC
 79  ${CPP_WRAPPER_SOURCES_CORE}
 80  ${CPP_WRAPPER_SOURCES_APP}
 81)
 82apply_standard_settings(flutter_wrapper_app)
 83target_link_libraries(flutter_wrapper_app PUBLIC flutter)
 84target_include_directories(flutter_wrapper_app PUBLIC
 85  "${WRAPPER_ROOT}/include"
 86)
 87add_dependencies(flutter_wrapper_app flutter_assemble)
 88
 89# === Flutter tool backend ===
 90# _phony_ is a non-existent file to force this command to run every time,
 91# since currently there's no way to get a full input/output list from the
 92# flutter tool.
 93set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
 94set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
 95add_custom_command(
 96  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
 97    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
 98    ${CPP_WRAPPER_SOURCES_APP}
 99    ${PHONY_OUTPUT}
100  COMMAND ${CMAKE_COMMAND} -E env
101    ${FLUTTER_TOOL_ENVIRONMENT}
102    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
103      ${FLUTTER_TARGET_PLATFORM} $<CONFIG>
104  VERBATIM
105)
106add_custom_target(flutter_assemble DEPENDS
107  "${FLUTTER_LIBRARY}"
108  ${FLUTTER_LIBRARY_HEADERS}
109  ${CPP_WRAPPER_SOURCES_CORE}
110  ${CPP_WRAPPER_SOURCES_PLUGIN}
111  ${CPP_WRAPPER_SOURCES_APP}
112)