# SPDX-License-Identifier: Apache-2.0

include(${ZEPHYR_BASE}/cmake/toolchain/zephyr/host-tools.cmake)

# west is optional
find_program(
  WEST
  west
  )
if(${WEST} STREQUAL WEST-NOTFOUND)
  unset(WEST)
else()
  # If west is found, make sure its version matches the minimum
  # required one.
  set(MIN_WEST_VERSION 0.6.0)
  execute_process(
    COMMAND
    ${PYTHON_EXECUTABLE}
    -c
    "import west.version; print(west.version.__version__, end='')"
    OUTPUT_VARIABLE west_version
    RESULT_VARIABLE west_version_output_result
    )

  if(west_version_output_result)
    message(FATAL_ERROR "Unable to import west.version from '${PYTHON_EXECUTABLE}'")
  endif()

  if(${west_version} VERSION_LESS ${MIN_WEST_VERSION})
    message(FATAL_ERROR "The detected west version is unsupported.\n\
  The version was found to be ${west_version}:\n\
    ${item}\n\
  But the minimum supported version is ${MIN_WEST_VERSION}\n\
  Please upgrade with:\n\
      pip3 install --upgrade west")
  endif()
  # Just output information for a single version. This will still work
  # even after output is one line.
  message(STATUS "Found west: ${WEST} (found suitable version \"${west_version}\", minimum required is \"${MIN_WEST_VERSION}\")")

  if (${west_version} VERSION_GREATER_EQUAL "0.7.0")
    execute_process(
      COMMAND ${WEST}  topdir
      OUTPUT_VARIABLE  WEST_TOPDIR
      OUTPUT_STRIP_TRAILING_WHITESPACE
      )
  endif()
endif()

# Search for the must-have program dtc on PATH and in
# TOOLCHAIN_HOME. Usually DTC will be provided by an SDK, but for
# SDK-less projects like gnuarmemb, it is up to the user to install
# dtc.
find_program(
  DTC
  dtc
  )
if(${DTC} STREQUAL DTC-NOTFOUND)
  message(FATAL_ERROR "Unable to find dtc")
endif()

# Parse the 'dtc --version' and make sure it is at least MIN_DTC_VERSION
set(MIN_DTC_VERSION 1.4.6)
execute_process(
  COMMAND
  ${DTC} --version
  OUTPUT_VARIABLE dtc_version_output
  )
string(REGEX MATCH "Version: DTC ([0-9]+\.[0-9]+.[0-9]+).*" out_var ${dtc_version_output})
if(${CMAKE_MATCH_1} VERSION_LESS ${MIN_DTC_VERSION})
  assert(0 "The detected dtc version is unsupported.                                 \n\
    The version was found to be ${CMAKE_MATCH_1}                                   \n\
    But the minimum supported version is ${MIN_DTC_VERSION}                        \n\
    See https://docs.zephyrproject.org/latest/getting_started/                     \n\
    for how to use the SDK's dtc alongside a custom toolchain."
  )
endif()

find_program(
  GPERF
  gperf
  )
if(${GPERF} STREQUAL GPERF-NOTFOUND)
  message(FATAL_ERROR "Unable to find gperf")
endif()

# openocd is an optional dependency
find_program(
  OPENOCD
  openocd
  )

# bossac is an optional dependency
find_program(
  BOSSAC
  bossac
  )

# TODO: Should we instead find one qemu binary for each ARCH?
# TODO: This will probably need to be re-organized when there exists more than one SDK.