CMakeLists.txt

# Copyright (c) 2023 Chase Colman. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be found
# in the LICENSE file.

cmake_minimum_required(VERSION 3.22)

set(CMAKE_CONFIGURATION_TYPES Debug Release)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

project(awrit VERSION 0.0.1)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED True)

if(POLICY CMP0135)
  cmake_policy(SET CMP0135 OLD)
endif()

set(CEF_VERSION 120.1.10+g3ce3184+chromium-120.0.6099.129)
set(GTEST_VERSION v1.13.0)
SET(GTEST_SHA bfa4b5131b6eaac06962c251742c96aab3f7aa78)

if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
  set(OS_MAC 1)
elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
  set(OS_LINUX 1)
elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Windows")
  set(OS_WINDOWS 1)
else()
  message(FATAL_ERROR "Unsupported platform ${CMAKE_SYSTEM_NAME}")
endif()

if(NOT DEFINED PROJECT_ARCH)
  if(("${CMAKE_HOST_SYSTEM_PROCESSOR}" STREQUAL "arm64") OR
     ("${CMAKE_CXX_COMPILER_ARCHITECTURE_ID}" STREQUAL "ARM64"))
    set(PROJECT_ARCH "arm64")
  elseif(CMAKE_SIZEOF_VOID_P MATCHES 8)
    set(PROJECT_ARCH "x86_64")
  else()
    message(FATAL_ERROR "Unsupported architecture")
  endif()
endif()

if (NOT OS_MAC AND PROJECT_ARCH STREQUAL "arm64")
  message(FATAL_ERROR "Only x64 is supported on Windows and Linux")
endif()

if (OS_MAC)
  if (PROJECT_ARCH STREQUAL "x86_64")
    set(CEF_PLATFORM "macosx64")
  else()
    set(CEF_PLATFORM "macosarm64")
  endif()
elseif(OS_LINUX)
  set(CEF_PLATFORM "linux64")
elseif(OS_WINDOWS)
  set(CEF_PLATFORM "windows64")
endif()

include(FetchContent)
# Download CEF if necessary
Set(FETCHCONTENT_QUIET FALSE)

function(GetCEFFileInfoForVesion INPUT_VERSION)
  # Fetch index file to resolve file name and sha1
  set(INDEX_FILE "${CMAKE_BINARY_DIR}/index.json")
  message(STATUS "Downloading index.json")
  file(DOWNLOAD https://cef-builds.spotifycdn.com/index.json ${INDEX_FILE})

  if (CMAKE_BUILD_TYPE STREQUAL "Release")
    set(CEF_TYPE "minimal")
  else()
    set(CEF_TYPE "standard")
  endif()

  # Read the file to memory and get the number of versions
  file(READ "${CMAKE_BINARY_DIR}/index.json" INDEX_CONTENT)
  string(JSON CEF_VERSIONS GET "${INDEX_CONTENT}" "${CEF_PLATFORM}" versions)
  string(JSON CEF_VERSIONS_LENGTH LENGTH "${CEF_VERSIONS}")   

  foreach(VERSION_IDX RANGE ${CEF_VERSIONS_LENGTH})
    # Find desired version and channel
    string(JSON CHANNEL GET "${CEF_VERSIONS}" ${VERSION_IDX} channel)
    string(JSON VERSION GET "${CEF_VERSIONS}" ${VERSION_IDX} cef_version)
    if(("${CHANNEL}" STREQUAL "stable") AND ("${VERSION}" STREQUAL "${INPUT_VERSION}"))

      # Find desired file type and extract name and sha1
      string(JSON FILES GET "${CEF_VERSIONS}" ${VERSION_IDX} files)
      string(JSON FILES_LENGTH LENGTH "${FILES}")   
      foreach(FILE_IDX RANGE ${FILES_LENGTH})
        string(JSON FILE_TYPE GET "${CEF_VERSIONS}" ${VERSION_IDX} files ${FILE_IDX} type)
        if ("${FILE_TYPE}" STREQUAL "${CEF_TYPE}")
          string(JSON SHA GET ${CEF_FILE_INFO} "${CEF_VERSIONS}" ${VERSION_IDX} files ${FILE_IDX} sha1)
          string(JSON NAME GET ${CEF_FILE_INFO} "${CEF_VERSIONS}" ${VERSION_IDX} files ${FILE_IDX} name)

          # Set vars bask to main scope
          set(CEF_FILE_SHA "${SHA}" PARENT_SCOPE)
          set(CEF_FILE_NAME  "${NAME}" PARENT_SCOPE)
          return()
        endif()
      endforeach()
    endif()
  endforeach()
endfunction()

GetCEFFileInfoForVesion("${CEF_VERSION}")
message(STATUS "Resolved CEF file ${CEF_FILE_NAME} with sha ${CEF_FILE_SHA}")

FetchContent_Declare(
  cef_src
  URL https://cef-builds.spotifycdn.com/${CEF_FILE_NAME}
  URL_HASH SHA1=${CEF_FILE_SHA}
  SOURCE_SUBDIR cmake
)
FetchContent_MakeAvailable(cef_src)

# gtest v1.13.0
FetchContent_Declare(
  googletest
  URL https://github.com/google/googletest/archive/refs/tags/${GTEST_VERSION}.tar.gz
  URL_HASH SHA1=${GTEST_SHA}
)
# For Windows: Prevent overriding the parent project's compiler/linker settings
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
set(INSTALL_GTEST OFF)
FetchContent_MakeAvailable(googletest)

# Use folders in the resulting project files.
set_property(GLOBAL PROPERTY OS_FOLDERS ON)

# Setup CEF
set(CEF_ROOT "${cef_src_SOURCE_DIR}")
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CEF_ROOT}/cmake")

find_package(CEF REQUIRED)
add_subdirectory(${CEF_LIBCEF_DLL_WRAPPER_PATH} libcef_dll_wrapper)

add_subdirectory(third_party)

include_directories(${CMAKE_CURRENT_SOURCE_DIR})

list(REMOVE_ITEM CEF_CXX_COMPILER_FLAGS -std=c++17)
list(APPEND CEF_CXX_COMPILER_FLAGS -std=c++20)

# Add the main project
add_subdirectory(awrit)

# Display configuration settings.
PRINT_CEF_CONFIG()

cmake_language(DEFER DIRECTORY "${CMAKE_BINARY_DIR}" CALL _copy_compile_commands())
function(_copy_compile_commands)
if (EXISTS "${CMAKE_BINARY_DIR}/compile_commands.json")
configure_file("${CMAKE_BINARY_DIR}/compile_commands.json" "${CMAKE_SOURCE_DIR}/compile_commands.json")
endif()
endfunction(_copy_compile_commands)