Index: opencv/cmake/OpenCVDownload.cmake
===================================================================
--- opencv.orig/cmake/OpenCVDownload.cmake	2024-12-11 01:59:53.471039798 +0000
+++ opencv/cmake/OpenCVDownload.cmake	2024-12-11 01:59:53.471039798 +0000
@@ -40,263 +40,11 @@
 ocv_check_environment_variables(OPENCV_DOWNLOAD_MIRROR_ID)
 
 function(ocv_init_download_mirror)
-  if(NOT DEFINED OPENCV_DOWNLOAD_MIRROR_ID)
-    # Run `git remote get-url origin` to get remote source
-    execute_process(
-      COMMAND
-        git remote get-url origin
-      WORKING_DIRECTORY
-        ${CMAKE_SOURCE_DIR}
-      RESULT_VARIABLE
-        RESULT_STATUS
-      OUTPUT_VARIABLE
-        OCV_GIT_ORIGIN_URL_OUTPUT
-      ERROR_QUIET
-    )
-    # if non-git, OCV_GIT_ORIGIN_URL_OUTPUT is empty
-    if(NOT OCV_GIT_ORIGIN_URL_OUTPUT)
-      message(STATUS "ocv_init_download: OpenCV source tree is not fetched as git repository. 3rdparty resources will be downloaded from github.com by default.")
-      return()
-    else()
-      # Check if git origin is github.com
-      string(FIND "${OCV_GIT_ORIGIN_URL_OUTPUT}" "github.com" _found_github)
-      if(NOT ${_found_github} EQUAL -1)
-        set(OPENCV_DOWNLOAD_MIRROR_ID "github" CACHE STRING "")
-      endif()
-      # Check if git origin is gitcode.net
-      string(FIND "${OCV_GIT_ORIGIN_URL_OUTPUT}" "gitcode.net" _found_gitcode)
-      if(NOT ${_found_gitcode} EQUAL -1)
-        set(OPENCV_DOWNLOAD_MIRROR_ID "gitcode" CACHE STRING "")
-      endif()
-    endif()
-  endif()
-
-  if(OPENCV_DOWNLOAD_MIRROR_ID STREQUAL "gitcode" OR OPENCV_DOWNLOAD_MIRROR_ID STREQUAL "custom")
-    message(STATUS "ocv_init_download: Using ${OPENCV_DOWNLOAD_MIRROR_ID}-hosted mirror to download 3rdparty components.")
-    ocv_cmake_hook_append(OPENCV_DOWNLOAD_PRE "${CMAKE_CURRENT_SOURCE_DIR}/cmake/mirrors/${OPENCV_DOWNLOAD_MIRROR_ID}.cmake")
-  elseif(OPENCV_DOWNLOAD_MIRROR_ID STREQUAL "github")
-    return()
-  else()
-    message(STATUS "ocv_init_download: Unable to recognize git server of OpenCV source code. Using github.com to download 3rdparty components.")
-  endif()
+  message(STATUS "ocv_init_download: No downloading as per Debian policy.")
 endfunction()
 
 function(ocv_download)
-  cmake_parse_arguments(DL "UNPACK;RELATIVE_URL" "FILENAME;HASH;DESTINATION_DIR;ID;STATUS" "URL" ${ARGN})
-
-  function(ocv_download_log)
-    file(APPEND "${OPENCV_DOWNLOAD_LOG}" "${ARGN}\n")
-  endfunction()
-
-  ocv_assert(DL_FILENAME)
-  ocv_assert(DL_HASH)
-  ocv_assert(DL_URL)
-  ocv_assert(DL_DESTINATION_DIR)
-  if((NOT " ${DL_UNPARSED_ARGUMENTS}" STREQUAL " ")
-    OR DL_FILENAME STREQUAL ""
-    OR DL_HASH STREQUAL ""
-    OR DL_URL STREQUAL ""
-    OR DL_DESTINATION_DIR STREQUAL ""
-  )
-    set(msg_level FATAL_ERROR)
-    if(DEFINED DL_STATUS)
-      set(${DL_STATUS} FALSE PARENT_SCOPE)
-      set(msg_level WARNING)
-    endif()
-    message(${msg_level} "ERROR: ocv_download() unsupported arguments: ${ARGV}")
-    return()
-  endif()
-
-  if(DEFINED DL_STATUS)
-    set(${DL_STATUS} TRUE PARENT_SCOPE)
-  endif()
-
-  ocv_cmake_hook(OPENCV_DOWNLOAD_PRE)
-
-  # Check CMake cache for already processed tasks
-  string(FIND "${DL_DESTINATION_DIR}" "${CMAKE_BINARY_DIR}" DL_BINARY_PATH_POS)
-  if(DL_BINARY_PATH_POS EQUAL 0)
-    set(__file_id "${DL_DESTINATION_DIR}/${DL_FILENAME}")
-    file(RELATIVE_PATH __file_id "${CMAKE_BINARY_DIR}" "${__file_id}")
-    string(REGEX REPLACE "[^a-zA-Z0-9_]" "_" __file_id "${__file_id}")
-    if(DL_ID)
-      string(TOUPPER ${DL_ID} __id)
-      string(REGEX REPLACE "[^a-zA-Z0-9_]" "_" __id "${__id}")
-      set(OCV_DOWNLOAD_HASH_NAME "OCV_DOWNLOAD_${__id}_HASH_${__file_id}")
-    else()
-      set(OCV_DOWNLOAD_HASH_NAME "OCV_DOWNLOAD_HASH_${__file_id}")
-    endif()
-    if(" ${${OCV_DOWNLOAD_HASH_NAME}}" STREQUAL " ${DL_HASH}")
-      ocv_download_log("#match_hash_in_cmake_cache \"${OCV_DOWNLOAD_HASH_NAME}\"")
-      return()
-    endif()
-    unset("${OCV_DOWNLOAD_HASH_NAME}" CACHE)
-  else()
-    set(OCV_DOWNLOAD_HASH_NAME "")
-    #message(WARNING "Download destination is not in CMAKE_BINARY_DIR=${CMAKE_BINARY_DIR}: ${DL_DESTINATION_DIR}")
-  endif()
-
-  # Select first non-empty url
-  foreach(url ${DL_URL})
-    if(url)
-      set(DL_URL "${url}")
-      break()
-    endif()
-  endforeach()
-
-  # Append filename to url if needed
-  if(DL_RELATIVE_URL)
-    set(DL_URL "${DL_URL}${DL_FILENAME}")
-  endif()
-
-  set(mode "copy")
-  if(DL_UNPACK)
-    set(mode "unpack")
-  endif()
-
-  # Log all calls to file
-  ocv_download_log("#do_${mode} \"${DL_FILENAME}\" \"${DL_HASH}\" \"${DL_URL}\" \"${DL_DESTINATION_DIR}\"")
-  # ... and to console
-  set(__msg_prefix "")
-  if(DL_ID)
-    set(__msg_prefix "${DL_ID}: ")
-  endif()
-  message(STATUS "${__msg_prefix}Downloading ${DL_FILENAME} from ${DL_URL}")
-
-  # Copy mode: check if copy destination exists and is correct
-  if(NOT DL_UNPACK)
-    set(COPY_DESTINATION "${DL_DESTINATION_DIR}/${DL_FILENAME}")
-    if(EXISTS "${COPY_DESTINATION}")
-      ocv_download_log("#check_md5 \"${COPY_DESTINATION}\"")
-      file(MD5 "${COPY_DESTINATION}" target_md5)
-      if(target_md5 STREQUAL DL_HASH)
-        ocv_download_log("#match_md5 \"${COPY_DESTINATION}\" \"${target_md5}\"")
-        if(OCV_DOWNLOAD_HASH_NAME)
-          set(${OCV_DOWNLOAD_HASH_NAME} "${DL_HASH}" CACHE INTERNAL "")
-        endif()
-        return()
-      endif()
-      ocv_download_log("#mismatch_md5 \"${COPY_DESTINATION}\" \"${target_md5}\"")
-    else()
-      ocv_download_log("#missing \"${COPY_DESTINATION}\"")
-    endif()
-  endif()
-
-  # Check cache first
-  if(DL_ID)
-    string(TOLOWER "${DL_ID}" __id)
-    string(REGEX REPLACE "[^a-zA-Z0-9_/ ]" "_" __id "${__id}")
-    set(CACHE_CANDIDATE "${OPENCV_DOWNLOAD_PATH}/${__id}/${DL_HASH}-${DL_FILENAME}")
-  else()
-    set(CACHE_CANDIDATE "${OPENCV_DOWNLOAD_PATH}/${DL_HASH}-${DL_FILENAME}")
-  endif()
-  if(EXISTS "${CACHE_CANDIDATE}")
-    ocv_download_log("#check_md5 \"${CACHE_CANDIDATE}\"")
-    file(MD5 "${CACHE_CANDIDATE}" target_md5)
-    if(NOT target_md5 STREQUAL DL_HASH)
-      ocv_download_log("#mismatch_md5 \"${CACHE_CANDIDATE}\" \"${target_md5}\"")
-      ocv_download_log("#delete \"${CACHE_CANDIDATE}\"")
-      file(REMOVE ${CACHE_CANDIDATE})
-    endif()
-  endif()
-
-  # Download
-  if(NOT EXISTS "${CACHE_CANDIDATE}")
-    ocv_download_log("#cmake_download \"${CACHE_CANDIDATE}\" \"${DL_URL}\"")
-    foreach(try ${OPENCV_DOWNLOAD_TRIES_LIST})
-      ocv_download_log("#try ${try}")
-      file(DOWNLOAD "${DL_URL}" "${CACHE_CANDIDATE}"
-           STATUS status
-           LOG __log
-           ${OPENCV_DOWNLOAD_PARAMS})
-      if(status EQUAL 0)
-        break()
-      endif()
-      message(STATUS "Try ${try} failed")
-    endforeach()
-    if(NOT OPENCV_SKIP_FILE_DOWNLOAD_DUMP)  # workaround problem with old CMake versions: "Invalid escape sequence"
-      string(LENGTH "${__log}" __log_length)
-      if(__log_length LESS 65536)
-        string(REPLACE "\n" "\n# " __log "${__log}")
-        ocv_download_log("# ${__log}\n")
-      endif()
-    endif()
-    if(NOT status EQUAL 0)
-      set(msg_level FATAL_ERROR)
-      if(DEFINED DL_STATUS)
-        set(${DL_STATUS} FALSE PARENT_SCOPE)
-        set(msg_level WARNING)
-      endif()
-      if(status MATCHES "Couldn't resolve host name")
-        message(STATUS "
-=======================================================================
-  Couldn't download files from the Internet.
-  Please check the Internet access on this host.
-=======================================================================
-")
-      elseif(status MATCHES "Couldn't connect to server")
-        message(STATUS "
-=======================================================================
-  Couldn't connect to server from the Internet.
-  Perhaps direct connections are not allowed in the current network.
-  To use proxy please check/specify these environment variables:
-  - http_proxy/https_proxy
-  - and/or HTTP_PROXY/HTTPS_PROXY
-=======================================================================
-")
-      endif()
-      message(${msg_level} "${__msg_prefix}Download failed: ${status}
-For details please refer to the download log file:
-${OPENCV_DOWNLOAD_LOG}
-")
-      # write helper scripts for failed downloads
-      file(APPEND "${OPENCV_DOWNLOAD_WITH_CURL}" "curl --create-dirs --output \"${CACHE_CANDIDATE}\" \"${DL_URL}\"\n")
-      file(APPEND "${OPENCV_DOWNLOAD_WITH_WGET}" "mkdir -p $(dirname ${CACHE_CANDIDATE}) && wget -O \"${CACHE_CANDIDATE}\" \"${DL_URL}\"\n")
-      return()
-    endif()
-
-    # Don't remove this code, because EXPECTED_MD5 parameter doesn't fail "file(DOWNLOAD)" step on wrong hash
-    ocv_download_log("#check_md5 \"${CACHE_CANDIDATE}\"")
-    file(MD5 "${CACHE_CANDIDATE}" target_md5)
-    if(NOT target_md5 STREQUAL DL_HASH)
-      ocv_download_log("#mismatch_md5 \"${CACHE_CANDIDATE}\" \"${target_md5}\"")
-      set(msg_level FATAL_ERROR)
-      if(DEFINED DL_STATUS)
-        set(${DL_STATUS} FALSE PARENT_SCOPE)
-        set(msg_level WARNING)
-      endif()
-      message(${msg_level} "${__msg_prefix}Hash mismatch: ${target_md5}")
-      return()
-    endif()
-  endif()
-
-  # Unpack or copy
-  if(DL_UNPACK)
-    if(EXISTS "${DL_DESTINATION_DIR}")
-      ocv_download_log("#remove_unpack \"${DL_DESTINATION_DIR}\"")
-      file(REMOVE_RECURSE "${DL_DESTINATION_DIR}")
-    endif()
-    ocv_download_log("#mkdir \"${DL_DESTINATION_DIR}\"")
-    file(MAKE_DIRECTORY "${DL_DESTINATION_DIR}")
-    ocv_download_log("#unpack \"${DL_DESTINATION_DIR}\" \"${CACHE_CANDIDATE}\"")
-    execute_process(COMMAND "${CMAKE_COMMAND}" -E tar xzf "${CACHE_CANDIDATE}"
-                    WORKING_DIRECTORY "${DL_DESTINATION_DIR}"
-                    RESULT_VARIABLE res)
-    if(NOT res EQUAL 0)
-      message(FATAL_ERROR "${__msg_prefix}Unpack failed: ${res}")
-    endif()
-  else()
-    ocv_download_log("#copy \"${COPY_DESTINATION}\" \"${CACHE_CANDIDATE}\"")
-    execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${CACHE_CANDIDATE}" "${COPY_DESTINATION}"
-                    RESULT_VARIABLE res)
-    if(NOT res EQUAL 0)
-      message(FATAL_ERROR "${__msg_prefix}Copy failed: ${res}")
-    endif()
-  endif()
-
-  if(OCV_DOWNLOAD_HASH_NAME)
-    set(${OCV_DOWNLOAD_HASH_NAME} "${DL_HASH}" CACHE INTERNAL "")
-  endif()
+  message(STATUS "ocv_download: Not downloading ${FILENAME} from ${URL} as per Debian policy.")
 endfunction()
 
 # ----------------------------------------------------------------------------