message: cmake: add download helper scripts
diff: @@ -20,16 +20,19 @@ if(DEFINED ENV{OPENCV_DOWNLOAD_PATH})
  endif()
  set(OPENCV_DOWNLOAD_PATH "${OpenCV_SOURCE_DIR}/.cache" CACHE PATH "${HELP_OPENCV_DOWNLOAD_PATH}")
  set(OPENCV_DOWNLOAD_LOG "${OpenCV_BINARY_DIR}/CMakeDownloadLog.txt")
  +set(OPENCV_DOWNLOAD_WITH_CURL "${OpenCV_BINARY_DIR}/download_with_curl.sh")
  +set(OPENCV_DOWNLOAD_WITH_WGET "${OpenCV_BINARY_DIR}/download_with_wget.sh")
  -# Init download cache directory and log file
  +# Init download cache directory and log file and helper scripts
  if(NOT EXISTS "${OPENCV_DOWNLOAD_PATH}")
  file(MAKE_DIRECTORY ${OPENCV_DOWNLOAD_PATH})
  endif()
  if(NOT EXISTS "${OPENCV_DOWNLOAD_PATH}/.gitignore")
  file(WRITE "${OPENCV_DOWNLOAD_PATH}/.gitignore" "*\n")
  endif()
  -file(WRITE "${OPENCV_DOWNLOAD_LOG}" "use_cache \"${OPENCV_DOWNLOAD_PATH}\"\n")
  -
  +file(WRITE "${OPENCV_DOWNLOAD_LOG}" "#use_cache \"${OPENCV_DOWNLOAD_PATH}\"\n")
  +file(REMOVE "${OPENCV_DOWNLOAD_WITH_CURL}")
  +file(REMOVE "${OPENCV_DOWNLOAD_WITH_WGET}")
  function(ocv_download)
  cmake_parse_arguments(DL "UNPACK;RELATIVE_URL" "FILENAME;HASH;DESTINATION_DIR;ID;STATUS" "URL" ${ARGN})
  @@ -103,7 +106,7 @@ function(ocv_download)
  endif()
  # Log all calls to file
  - ocv_download_log("do_${mode} \"${DL_FILENAME}\" \"${DL_HASH}\" \"${DL_URL}\" \"${DL_DESTINATION_DIR}\"")
  + ocv_download_log("#do_${mode} \"${DL_FILENAME}\" \"${DL_HASH}\" \"${DL_URL}\" \"${DL_DESTINATION_DIR}\"")
  # ... and to console
  set(__msg_prefix "")
  if(DL_ID)
  @@ -191,6 +194,9 @@ function(ocv_download)
  For details please refer to the download log file:
  ${OPENCV_DOWNLOAD_LOG}
  ")
  + # write helper scripts for failed downloads
  + file(APPEND "${OPENCV_DOWNLOAD_WITH_CURL}" "curl --output \"${CACHE_CANDIDATE}\" \"${DL_URL}\"\n")
  + file(APPEND "${OPENCV_DOWNLOAD_WITH_WGET}" "wget -O \"${CACHE_CANDIDATE}\" \"${DL_URL}\"\n")
  return()
  endif()
  