# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.


include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)

if("${CMAKE_GENERATOR}" STREQUAL "Xcode")
  if(XCODE_VERSION VERSION_LESS 6.1)
    message(FATAL_ERROR "Swift language not supported by Xcode ${XCODE_VERSION}")
  endif()
  set(CMAKE_Swift_COMPILER_XCODE_TYPE sourcecode.swift)
  _cmake_find_compiler_path(Swift)
else()
  message(FATAL_ERROR "Swift language not supported by \"${CMAKE_GENERATOR}\" generator")
endif()

# Build a small source file to identify the compiler.
if(NOT CMAKE_Swift_COMPILER_ID_RUN)
  set(CMAKE_Swift_COMPILER_ID_RUN 1)

  list(APPEND CMAKE_Swift_COMPILER_ID_MATCH_VENDORS Apple)
  set(CMAKE_Swift_COMPILER_ID_MATCH_VENDOR_REGEX_Apple "com.apple.xcode.tools.swift.compiler")

  set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_REGEX "\nCompileSwiftSources[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]* -c[^\r\n]*CompilerIdSwift/CompilerId/main.swift")
  set(CMAKE_Swift_COMPILER_ID_TOOL_MATCH_INDEX 2)

  # Try to identify the compiler.
  set(CMAKE_Swift_COMPILER_ID)
  include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
  CMAKE_DETERMINE_COMPILER_ID(Swift "" CompilerId/main.swift)
endif()

if (NOT _CMAKE_TOOLCHAIN_LOCATION)
  get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_Swift_COMPILER}" PATH)
endif ()

include(CMakeFindBinUtils)

# configure variables set in this file for fast reload later on
configure_file(${CMAKE_ROOT}/Modules/CMakeSwiftCompiler.cmake.in
  ${CMAKE_PLATFORM_INFO_DIR}/CMakeSwiftCompiler.cmake
  @ONLY
  )
