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

cmake_minimum_required(VERSION ${CMAKE_VERSION}) # this file comes with cmake

if("@LOCAL@" STREQUAL "")
  message(FATAL_ERROR "LOCAL can't be empty")
endif()

if(NOT EXISTS "@LOCAL@")
  message(FATAL_ERROR "File not found: @LOCAL@")
endif()

if("@ALGO@" STREQUAL "")
  message(WARNING "File cannot be verified since no URL_HASH specified")
  return()
endif()

if("@EXPECT_VALUE@" STREQUAL "")
  message(FATAL_ERROR "EXPECT_VALUE can't be empty")
endif()

message(VERBOSE "verifying file...
     file='@LOCAL@'")

file("@ALGO@" "@LOCAL@" actual_value)

if(NOT "${actual_value}" STREQUAL "@EXPECT_VALUE@")
  message(FATAL_ERROR "error: @ALGO@ hash of
  @LOCAL@
does not match expected value
  expected: '@EXPECT_VALUE@'
    actual: '${actual_value}'
")
endif()

message(VERBOSE "verifying file... done")