cmake_minimum_required(VERSION 3.22)

project(format-demo)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
add_custom_command(OUTPUT main-formatted.cc
  DEPENDS main-unformatted.cc .clang-format .clang-tidy
  BYPRODUCTS main-previous.cc main-diff.cc
  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/main-unformatted.cc main-formatted.cc
  COMMAND sh -c "test -f main-formatted.cc && ${CMAKE_COMMAND} -E copy main-formatted.cc main-previous.cc"
  COMMAND clang-format-14 -i --style=file:${CMAKE_CURRENT_SOURCE_DIR}/.clang-format main-formatted.cc
  COMMAND clang-tidy-14 --use-color --fix --fix-notes -fix-errors -p ${CMAKE_CURRENT_BINARY_DIR} main-formatted.cc
  COMMAND chmod 0444 main-formatted.cc
  # COMMAND sh -c "test -f main-previous.cc && diff -u main-previous.cc main-formatted.cc > main-diff.cc"
  VERBATIM)

add_executable(output
  ${CMAKE_CURRENT_BINARY_DIR}/main-formatted.cc)


add_custom_target(format
  DEPENDS main-formatted.cc
  COMMENT "Formatting and linting sources"
  SOURCES main-unformatted.cc
          ${CMAKE_CURRENT_BINARY_DIR}/main-formatted.cc
          ${CMAKE_CURRENT_BINARY_DIR}/main-diff.cc
          .clang-format
          .clang-tidy
  VERBATIM)