# This finds the rocm-cmake project, and installs it if not found
# rocm-cmake contains common cmake code for rocm projects to help setup and install
set(PROJECT_EXTERN_DIR ${CMAKE_CURRENT_BINARY_DIR}/extern)

# By default, rocm software stack is expected at /opt/rocm
# set environment variable ROCM_PATH to change location
if(NOT ROCM_PATH)
  set(ROCM_PATH /opt/rocm)
endif()

find_package(ROCmCMakeBuildTools QUIET PATHS ${ROCM_PATH})
if(NOT ROCmCMakeBuildTools_FOUND)
  find_package(ROCM 0.7.3 CONFIG QUIET PATHS ${ROCM_PATH})
  if(NOT ROCM_FOUND)
    set(rocm_cmake_tag "master" CACHE STRING "rocm-cmake tag to download")
    set(rocm_cmake_url "https://github.com/RadeonOpenCompute/rocm-cmake/archive/${rocm_cmake_tag}.zip")
    set(rocm_cmake_path "${PROJECT_EXTERN_DIR}/rocm-cmake-${rocm_cmake_tag}")
    set(rocm_cmake_archive "${rocm_cmake_path}.zip")
    file(DOWNLOAD "${rocm_cmake_url}" "${rocm_cmake_archive}" STATUS status LOG log)

    list(GET status 0 status_code)
    list(GET status 1 status_string)

    if(status_code EQUAL 0)
      message(STATUS "downloading... done")
    else()
      message(FATAL_ERROR "error: downloading\n'${rocm_cmake_url}' failed
      status_code: ${status_code}
      status_string: ${status_string}
      log: ${log}\n")
    endif()

    execute_process(COMMAND ${CMAKE_COMMAND} -E tar xzvf "${rocm_cmake_archive}"
      WORKING_DIRECTORY ${PROJECT_EXTERN_DIR})
    execute_process( COMMAND ${CMAKE_COMMAND} -DCMAKE_INSTALL_PREFIX=${PROJECT_EXTERN_DIR}/rocm-cmake .
      WORKING_DIRECTORY ${PROJECT_EXTERN_DIR}/rocm-cmake-${rocm_cmake_tag} )
    execute_process( COMMAND ${CMAKE_COMMAND} --build rocm-cmake-${rocm_cmake_tag} --target install
      WORKING_DIRECTORY ${PROJECT_EXTERN_DIR})

    find_package( ROCM 0.7.3 REQUIRED CONFIG PATHS ${PROJECT_EXTERN_DIR}/rocm-cmake )
  endif()
endif()