14 files changed, 0 insertions, 929 deletions
diff --git a/Modules/ExternalProject/RepositoryInfo.txt.in b/Modules/ExternalProject/RepositoryInfo.txt.in
deleted file mode 100644
index d82f04c724..0000000000
--- a/Modules/ExternalProject/RepositoryInfo.txt.in
+++ /dev/null
@@ -1 +0,0 @@
-@repo_info_content@
diff --git a/Modules/ExternalProject/captured_process_setup.cmake b/Modules/ExternalProject/captured_process_setup.cmake
deleted file mode 100644
index 9c8abb1203..0000000000
--- a/Modules/ExternalProject/captured_process_setup.cmake
+++ /dev/null
@@ -1,55 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-if(quiet)
-  set(capture_output
-    OUTPUT_VARIABLE out_var
-    ERROR_VARIABLE  out_var
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    ERROR_STRIP_TRAILING_WHITESPACE
-  )
-  set(capture_error_only
-    ERROR_VARIABLE  out_var
-    ERROR_STRIP_TRAILING_WHITESPACE
-  )
-else()
-  unset(capture_output)
-  unset(capture_error_only)
-endif()
-
-set(out_var "")
-set(accumulated_output "")
-
-macro(_ep_message_quiet_capture mode)
-  if("${mode}" STREQUAL "FATAL_ERROR")
-    string(JOIN "" detail "${ARGN}")
-    if(NOT detail STREQUAL "" AND NOT accumulated_output STREQUAL "")
-      string(PREPEND detail "\n")
-    endif()
-    message(FATAL_ERROR "${accumulated_output}${detail}")
-  endif()
-
-  if(quiet)
-    if("${mode}" MATCHES "WARNING")
-      # We can't provide the full CMake backtrace, but we can at least record
-      # the warning message with a sensible prefix
-      string(APPEND accumulated_output "${mode}: ")
-    endif()
-    string(APPEND accumulated_output "${ARGN}\n")
-  else()
-    message(${mode} ${ARGN})
-  endif()
-endmacro()
-
-macro(_ep_accumulate_captured_output)
-  if(NOT "${out_var}" STREQUAL "")
-    string(APPEND accumulated_output "${out_var}\n")
-  endif()
-endmacro()
-
-macro(_ep_command_check_result result)
-  _ep_accumulate_captured_output()
-  if(result)
-    _ep_message_quiet_capture(FATAL_ERROR ${ARGN})
-  endif()
-endmacro()
diff --git a/Modules/ExternalProject/cfgcmd.txt.in b/Modules/ExternalProject/cfgcmd.txt.in
deleted file mode 100644
index b3f09efc8d..0000000000
--- a/Modules/ExternalProject/cfgcmd.txt.in
+++ /dev/null
@@ -1 +0,0 @@
-cmd='@cmd@'
diff --git a/Modules/ExternalProject/copydir.cmake.in b/Modules/ExternalProject/copydir.cmake.in
deleted file mode 100644
index 5dd3891c3f..0000000000
--- a/Modules/ExternalProject/copydir.cmake.in
+++ /dev/null
@@ -1,10 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-file(REMOVE_RECURSE "@to_dir@")
-
-# Copy the _contents_ of the source dir into the destination dir, hence the
-# trailing slash on the from_dir
-file(COPY "@from_dir@/" DESTINATION "@to_dir@")
diff --git a/Modules/ExternalProject/customcommand.cmake.in b/Modules/ExternalProject/customcommand.cmake.in
deleted file mode 100644
index d41f31b83e..0000000000
--- a/Modules/ExternalProject/customcommand.cmake.in
+++ /dev/null
@@ -1,8 +0,0 @@
-
-execute_process(
-  COMMAND @this_command@
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE result
-  ${capture_output}
-)
-_ep_command_check_result(result)
diff --git a/Modules/ExternalProject/customcommand_preamble.cmake.in b/Modules/ExternalProject/customcommand_preamble.cmake.in
deleted file mode 100644
index ae4fec66cd..0000000000
--- a/Modules/ExternalProject/customcommand_preamble.cmake.in
+++ /dev/null
@@ -1,8 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
diff --git a/Modules/ExternalProject/download.cmake.in b/Modules/ExternalProject/download.cmake.in
deleted file mode 100644
index c8d2f28f18..0000000000
--- a/Modules/ExternalProject/download.cmake.in
+++ /dev/null
@@ -1,205 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-function(check_file_hash has_hash hash_is_good)
-  if("${has_hash}" STREQUAL "")
-    _ep_message_quiet_capture(FATAL_ERROR "has_hash Can't be empty")
-  endif()
-
-  if("${hash_is_good}" STREQUAL "")
-    _ep_message_quiet_capture(FATAL_ERROR "hash_is_good Can't be empty")
-  endif()
-
-  if("@ALGO@" STREQUAL "")
-    # No check
-    set("${has_hash}" FALSE PARENT_SCOPE)
-    set("${hash_is_good}" FALSE PARENT_SCOPE)
-    return()
-  endif()
-
-  set("${has_hash}" TRUE PARENT_SCOPE)
-
-  _ep_message_quiet_capture(STATUS "verifying file...
-       file='@LOCAL@'")
-  set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-
-  file("@ALGO@" "@LOCAL@" actual_value)
-
-  if(NOT "${actual_value}" STREQUAL "@EXPECT_VALUE@")
-    set("${hash_is_good}" FALSE PARENT_SCOPE)
-    _ep_message_quiet_capture(STATUS "@ALGO@ hash of
-    @LOCAL@
-  does not match expected value
-    expected: '@EXPECT_VALUE@'
-      actual: '${actual_value}'")
-    set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-  else()
-    set("${hash_is_good}" TRUE PARENT_SCOPE)
-  endif()
-endfunction()
-
-function(sleep_before_download attempt)
-  if(attempt EQUAL 0)
-    return()
-  endif()
-
-  if(attempt EQUAL 1)
-    _ep_message_quiet_capture(STATUS "Retrying...")
-    set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-    return()
-  endif()
-
-  set(sleep_seconds 0)
-
-  if(attempt EQUAL 2)
-    set(sleep_seconds 5)
-  elseif(attempt EQUAL 3)
-    set(sleep_seconds 5)
-  elseif(attempt EQUAL 4)
-    set(sleep_seconds 15)
-  elseif(attempt EQUAL 5)
-    set(sleep_seconds 60)
-  elseif(attempt EQUAL 6)
-    set(sleep_seconds 90)
-  elseif(attempt EQUAL 7)
-    set(sleep_seconds 300)
-  else()
-    set(sleep_seconds 1200)
-  endif()
-
-  _ep_message_quiet_capture(STATUS
-    "Retry after ${sleep_seconds} seconds (attempt #${attempt}) ..."
-  )
-  set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-
-  execute_process(COMMAND "${CMAKE_COMMAND}" -E sleep "${sleep_seconds}")
-endfunction()
-
-if("@LOCAL@" STREQUAL "")
-  message(FATAL_ERROR "LOCAL can't be empty")
-endif()
-
-if("@REMOTE@" STREQUAL "")
-  message(FATAL_ERROR "REMOTE can't be empty")
-endif()
-
-function(download_and_verify)
-  if(EXISTS "@LOCAL@")
-    check_file_hash(has_hash hash_is_good)
-    if(has_hash)
-      if(hash_is_good)
-        _ep_message_quiet_capture(STATUS
-"File already exists and hash match (skip download):
-  file='@LOCAL@'
-  @ALGO@='@EXPECT_VALUE@'"
-        )
-        set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-        return()
-      else()
-        _ep_message_quiet_capture(STATUS
-          "File already exists but hash mismatch. Removing..."
-        )
-        set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-        file(REMOVE "@LOCAL@")
-      endif()
-    else()
-      _ep_message_quiet_capture(STATUS
-"File already exists but no hash specified (use URL_HASH):
-  file='@LOCAL@'
-Old file will be removed and new file downloaded from URL."
-      )
-      file(REMOVE "@LOCAL@")
-    endif()
-  endif()
-
-  set(retry_number 5)
-
-  _ep_message_quiet_capture(STATUS "Downloading...
-   dst='@LOCAL@'
-   timeout='@TIMEOUT_MSG@'
-   inactivity timeout='@INACTIVITY_TIMEOUT_MSG@'"
-  )
-  set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-  set(download_retry_codes 7 6 8 15)
-  set(skip_url_list)
-  set(status_code)
-  foreach(i RANGE ${retry_number})
-    if(status_code IN_LIST download_retry_codes)
-      sleep_before_download(${i})
-    endif()
-    foreach(url @REMOTE@)
-      if(NOT url IN_LIST skip_url_list)
-        _ep_message_quiet_capture(STATUS "Using src='${url}'")
-        set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-
-        @TLS_VERIFY_CODE@
-        @TLS_CAINFO_CODE@
-        @NETRC_CODE@
-        @NETRC_FILE_CODE@
-
-        file(
-          DOWNLOAD
-          "${url}" "@LOCAL@"
-          @SHOW_PROGRESS@
-          @TIMEOUT_ARGS@
-          @INACTIVITY_TIMEOUT_ARGS@
-          STATUS status
-          LOG log
-          @USERPWD_ARGS@
-          @HTTP_HEADERS_ARGS@
-          )
-
-        list(GET status 0 status_code)
-        list(GET status 1 status_string)
-
-        if(status_code EQUAL 0)
-          check_file_hash(has_hash hash_is_good)
-          if(has_hash AND NOT hash_is_good)
-            _ep_message_quiet_capture(STATUS "Hash mismatch, removing...")
-            set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-            file(REMOVE "@LOCAL@")
-          else()
-            _ep_message_quiet_capture(STATUS "Downloading... done")
-            set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-            return()
-          endif()
-        else()
-          string(APPEND logFailedURLs
-"error: downloading '${url}' failed
-        status_code: ${status_code}
-        status_string: ${status_string}
-        log:
-        --- LOG BEGIN ---
-        ${log}
-        --- LOG END ---
-        "
-          )
-        if(NOT status_code IN_LIST download_retry_codes)
-          list(APPEND skip_url_list "${url}")
-          break()
-        endif()
-      endif()
-    endif()
-    endforeach()
-  endforeach()
-
-  _ep_message_quiet_capture(FATAL_ERROR
-"Each download failed!
-  ${logFailedURLs}
-  "
-  )
-
-endfunction()
-
-download_and_verify()
-
-set(extract_script @extract_script_filename@)
-if(NOT "${extract_script}" STREQUAL "")
-  include(${extract_script})
-endif()
diff --git a/Modules/ExternalProject/extractfile.cmake.in b/Modules/ExternalProject/extractfile.cmake.in
deleted file mode 100644
index d46de73408..0000000000
--- a/Modules/ExternalProject/extractfile.cmake.in
+++ /dev/null
@@ -1,73 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-# Make file names absolute:
-#
-get_filename_component(filename "@filename@" ABSOLUTE)
-get_filename_component(directory "@directory@" ABSOLUTE)
-
-_ep_message_quiet_capture(STATUS "extracting...
-     src='${filename}'
-     dst='${directory}'"
-)
-
-if(NOT EXISTS "${filename}")
-  _ep_message_quiet_capture(FATAL_ERROR
-    "File to extract does not exist: '${filename}'"
-  )
-endif()
-
-# Prepare a space for extracting:
-#
-set(i 1234)
-while(EXISTS "${directory}/../ex-@name@${i}")
-  math(EXPR i "${i} + 1")
-endwhile()
-set(ut_dir "${directory}/../ex-@name@${i}")
-file(MAKE_DIRECTORY "${ut_dir}")
-
-# Extract it:
-#
-_ep_message_quiet_capture(STATUS "extracting... [tar @args@]")
-execute_process(COMMAND ${CMAKE_COMMAND} -E tar @args@ ${filename}
-  WORKING_DIRECTORY ${ut_dir}
-  RESULT_VARIABLE rv
-  ${capture_output}
-)
-_ep_accumulate_captured_output()
-
-if(NOT rv EQUAL 0)
-  _ep_message_quiet_capture(STATUS "extracting... [error clean up]")
-  file(REMOVE_RECURSE "${ut_dir}")
-  _ep_message_quiet_capture(FATAL_ERROR "Extract of '${filename}' failed")
-endif()
-
-# Analyze what came out of the tar file:
-#
-_ep_message_quiet_capture(STATUS "extracting... [analysis]")
-file(GLOB contents "${ut_dir}/*")
-list(REMOVE_ITEM contents "${ut_dir}/.DS_Store")
-list(LENGTH contents n)
-if(NOT n EQUAL 1 OR NOT IS_DIRECTORY "${contents}")
-  set(contents "${ut_dir}")
-endif()
-
-# Move "the one" directory to the final directory:
-#
-_ep_message_quiet_capture(STATUS "extracting... [rename]")
-file(REMOVE_RECURSE ${directory})
-get_filename_component(contents ${contents} ABSOLUTE)
-file(RENAME ${contents} ${directory})
-
-# Clean up:
-#
-_ep_message_quiet_capture(STATUS "extracting... [clean up]")
-file(REMOVE_RECURSE "${ut_dir}")
-
-_ep_message_quiet_capture(STATUS "extracting... done")
diff --git a/Modules/ExternalProject/gitclone.cmake.in b/Modules/ExternalProject/gitclone.cmake.in
deleted file mode 100644
index edbdd72bde..0000000000
--- a/Modules/ExternalProject/gitclone.cmake.in
+++ /dev/null
@@ -1,93 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-if(EXISTS "@gitclone_stampfile@" AND EXISTS "@gitclone_infofile@" AND
-   "@gitclone_stampfile@" IS_NEWER_THAN "@gitclone_infofile@")
-  if(NOT quiet)
-    message(STATUS
-      "Avoiding repeated git clone, stamp file is up to date: "
-      "'@gitclone_stampfile@'"
-    )
-  endif()
-  return()
-endif()
-
-execute_process(
-  COMMAND ${CMAKE_COMMAND} -E rm -rf "@source_dir@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to remove directory: '@source_dir@'"
-)
-
-# try the clone 3 times in case there is an odd git clone issue
-set(error_code 1)
-set(number_of_tries 0)
-while(error_code AND number_of_tries LESS 3)
-  # If you are seeing the following call hang and you have QUIET enabled, try
-  # turning QUIET off to show any output immediately. The command may be
-  # blocking while waiting for user input (e.g. a password to a SSH key).
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" @git_options@
-            clone @git_clone_options@ "@git_repository@" "@src_name@"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  if(NOT "${out_var}" STREQUAL "")
-    string(APPEND accumulated_output "${out_var}\n")
-  endif()
-  math(EXPR number_of_tries "${number_of_tries} + 1")
-endwhile()
-if(number_of_tries GREATER 1)
-  set(msg "Had to git clone more than once: ${number_of_tries} times.")
-  if(quiet)
-    string(APPEND accumulated_output "${msg}\n")
-  else()
-    message(STATUS "${msg}")
-  endif()
-endif()
-_ep_command_check_result(
-  error_code "Failed to clone repository: '@git_repository@'"
-)
-
-execute_process(
-  COMMAND "@git_EXECUTABLE@" @git_options@
-          checkout "@git_tag@" @git_checkout_explicit--@
-  WORKING_DIRECTORY "@work_dir@/@src_name@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(error_code "Failed to checkout tag: '@git_tag@'")
-
-set(init_submodules @init_submodules@)
-if(init_submodules)
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" @git_options@
-            submodule update @git_submodules_recurse@ --init @git_submodules@
-    WORKING_DIRECTORY "@work_dir@/@src_name@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_command_check_result(
-    error_code "Failed to update submodules in: '@work_dir@/@src_name@'"
-  )
-endif()
-
-# Complete success, update the script-last-run stamp file:
-#
-execute_process(
-  COMMAND ${CMAKE_COMMAND} -E copy "@gitclone_infofile@" "@gitclone_stampfile@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to copy script-last-run stamp file: '@gitclone_stampfile@'"
-)
diff --git a/Modules/ExternalProject/gitupdate.cmake.in b/Modules/ExternalProject/gitupdate.cmake.in
deleted file mode 100644
index fc2a6aba5e..0000000000
--- a/Modules/ExternalProject/gitupdate.cmake.in
+++ /dev/null
@@ -1,315 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-function(get_hash_for_ref ref out_var err_var)
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" rev-parse "${ref}"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    OUTPUT_VARIABLE ref_hash
-    ERROR_VARIABLE error_msg
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-  )
-  if(error_code)
-    set(${out_var} "" PARENT_SCOPE)
-  else()
-    set(${out_var} "${ref_hash}" PARENT_SCOPE)
-  endif()
-  set(${err_var} "${error_msg}" PARENT_SCOPE)
-endfunction()
-
-get_hash_for_ref(HEAD head_sha error_msg)
-if(head_sha STREQUAL "")
-  message(FATAL_ERROR "Failed to get the hash for HEAD:\n${error_msg}")
-endif()
-
-
-execute_process(
-  COMMAND "@git_EXECUTABLE@" show-ref "@git_tag@"
-  WORKING_DIRECTORY "@work_dir@"
-  OUTPUT_VARIABLE show_ref_output
-)
-if(show_ref_output MATCHES "^[a-z0-9]+[ \\t]+refs/remotes/")
-  # Given a full remote/branch-name and we know about it already. Since
-  # branches can move around, we always have to fetch.
-  set(fetch_required YES)
-  set(checkout_name "@git_tag@")
-
-elseif(show_ref_output MATCHES "^[a-z0-9]+[ \\t]+refs/tags/")
-  # Given a tag name that we already know about. We don't know if the tag we
-  # have matches the remote though (tags can move), so we should fetch.
-  set(fetch_required YES)
-  set(checkout_name "@git_tag@")
-
-  # Special case to preserve backward compatibility: if we are already at the
-  # same commit as the tag we hold locally, don't do a fetch and assume the tag
-  # hasn't moved on the remote.
-  # FIXME: We should provide an option to always fetch for this case
-  get_hash_for_ref("@git_tag@" tag_sha error_msg)
-  if(tag_sha STREQUAL head_sha)
-    _ep_message_quiet_capture(VERBOSE "Already at requested tag: ${tag_sha}")
-    return()
-  endif()
-
-elseif(show_ref_output MATCHES "^[a-z0-9]+[ \\t]+refs/heads/")
-  # Given a branch name without any remote and we already have a branch by that
-  # name. We might already have that branch checked out or it might be a
-  # different branch. It isn't safe to use a bare branch name without the
-  # remote, so do a fetch and replace the ref with one that includes the remote.
-  set(fetch_required YES)
-  set(checkout_name "@git_remote_name@/@git_tag@")
-
-else()
-  get_hash_for_ref("@git_tag@" tag_sha error_msg)
-  if(tag_sha STREQUAL head_sha)
-    # Have the right commit checked out already
-    _ep_message_quiet_capture(VERBOSE "Already at requested ref: ${tag_sha}")
-    return()
-
-  elseif(tag_sha STREQUAL "")
-    # We don't know about this ref yet, so we have no choice but to fetch.
-    # We deliberately swallow any error message at the default log level
-    # because it can be confusing for users to see a failed git command.
-    # That failure is being handled here, so it isn't an error.
-    set(fetch_required YES)
-    set(checkout_name "@git_tag@")
-    if(NOT error_msg STREQUAL "")
-      _ep_message_quiet_capture(VERBOSE "${error_msg}")
-    endif()
-
-  else()
-    # We have the commit, so we know we were asked to find a commit hash
-    # (otherwise it would have been handled further above), but we don't
-    # have that commit checked out yet
-    set(fetch_required NO)
-    set(checkout_name "@git_tag@")
-    if(NOT error_msg STREQUAL "")
-      _ep_message_quiet_capture(WARNING "${error_msg}")
-    endif()
-
-  endif()
-endif()
-
-if(fetch_required)
-  _ep_message_quiet_capture(VERBOSE "Fetching latest from the remote @git_remote_name@")
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" fetch --tags --force "@git_remote_name@"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_command_check_result(
-    error_code "Failed to fetch from the remote @git_remote_name@'"
-  )
-endif()
-
-set(git_update_strategy "@git_update_strategy@")
-if(git_update_strategy STREQUAL "")
-  # Backward compatibility requires REBASE as the default behavior
-  set(git_update_strategy REBASE)
-endif()
-
-if(git_update_strategy MATCHES "^REBASE(_CHECKOUT)?$")
-  # Asked to potentially try to rebase first, maybe with fallback to checkout.
-  # We can't if we aren't already on a branch and we shouldn't if that local
-  # branch isn't tracking the one we want to checkout.
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" symbolic-ref -q HEAD
-    WORKING_DIRECTORY "@work_dir@"
-    OUTPUT_VARIABLE current_branch
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-    # Don't test for an error. If this isn't a branch, we get a non-zero error
-    # code but empty output.
-  )
-
-  if(current_branch STREQUAL "")
-    # Not on a branch, checkout is the only sensible option since any rebase
-    # would always fail (and backward compatibility requires us to checkout in
-    # this situation)
-    set(git_update_strategy CHECKOUT)
-
-  else()
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" for-each-ref
-              "--format='%(upstream:short)'" "${current_branch}"
-      WORKING_DIRECTORY "@work_dir@"
-      RESULT_VARIABLE error_code  # There is no error if no upstream is set
-      OUTPUT_VARIABLE upstream_branch
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-      ${capture_error_only}
-    )
-    _ep_command_check_result(error_code)
-    if(NOT upstream_branch STREQUAL checkout_name)
-      # Not safe to rebase when asked to checkout a different branch to the one
-      # we are tracking. If we did rebase, we could end up with arbitrary
-      # commits added to the ref we were asked to checkout if the current local
-      # branch happens to be able to rebase onto the target branch. There would
-      # be no error message and the user wouldn't know this was occurring.
-      set(git_update_strategy CHECKOUT)
-    endif()
-
-  endif()
-elseif(NOT git_update_strategy STREQUAL "CHECKOUT")
-  _ep_message_quiet_capture(FATAL_ERROR
-    "Unsupported git update strategy: ${git_update_strategy}"
-  )
-endif()
-
-
-# Check if stash is needed
-execute_process(
-  COMMAND "@git_EXECUTABLE@" status --porcelain
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE error_code
-  OUTPUT_VARIABLE repo_status
-  ${capture_error_only}
-)
-_ep_command_check_result(error_code "Failed to get the status")
-string(LENGTH "${repo_status}" need_stash)
-
-# If not in clean state, stash changes in order to be able to perform a
-# rebase or checkout without losing those changes permanently
-if(need_stash)
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" stash save @git_stash_save_options@
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_command_check_result(error_code)
-endif()
-
-if(git_update_strategy STREQUAL "CHECKOUT")
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" checkout "${checkout_name}"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_command_check_result(error_code)
-else()
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" rebase "${checkout_name}"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    OUTPUT_VARIABLE rebase_output
-    ERROR_VARIABLE  rebase_output
-  )
-  if(error_code)
-    # Rebase failed, undo the rebase attempt before continuing
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" rebase --abort
-      WORKING_DIRECTORY "@work_dir@"
-    )
-
-    if(NOT git_update_strategy STREQUAL "REBASE_CHECKOUT")
-      # Not allowed to do a checkout as a fallback, so cannot proceed
-      if(need_stash)
-        execute_process(
-          COMMAND "@git_EXECUTABLE@" stash pop --index --quiet
-          WORKING_DIRECTORY "@work_dir@"
-        )
-      endif()
-      _ep_message_quiet_capture(FATAL_ERROR
-        "\nFailed to rebase in: '@work_dir@'."
-        "\nOutput from the attempted rebase follows:"
-        "\n${rebase_output}"
-        "\n\nYou will have to resolve the conflicts manually"
-      )
-    endif()
-
-    # Fall back to checkout. We create an annotated tag so that the user
-    # can manually inspect the situation and revert if required.
-    # We can't log the failed rebase output because MSVC sees it and
-    # intervenes, causing the build to fail even though it completes.
-    # Write it to a file instead.
-    string(TIMESTAMP tag_timestamp "%Y%m%dT%H%M%S" UTC)
-    set(tag_name _cmake_ExternalProject_moved_from_here_${tag_timestamp}Z)
-    set(error_log_file ${CMAKE_CURRENT_LIST_DIR}/rebase_error_${tag_timestamp}Z.log)
-    file(WRITE ${error_log_file} "${rebase_output}")
-    _ep_message_quiet_capture(WARNING
-      "Rebase failed, output has been saved to ${error_log_file}"
-      "\nFalling back to checkout, previous commit tagged as ${tag_name}"
-    )
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" tag -a
-              -m "ExternalProject attempting to move from here to ${checkout_name}"
-              ${tag_name}
-      WORKING_DIRECTORY "@work_dir@"
-      RESULT_VARIABLE error_code
-      ${capture_output}
-    )
-    _ep_command_check_result(error_code)
-
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" checkout "${checkout_name}"
-      WORKING_DIRECTORY "@work_dir@"
-      RESULT_VARIABLE error_code
-      ${capture_output}
-    )
-    _ep_command_check_result(error_code)
-  endif()
-endif()
-
-if(need_stash)
-  # Put back the stashed changes
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" stash pop --index --quiet
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_accumulate_captured_output()
-  if(error_code)
-    # Stash pop --index failed: Try again dropping the index
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" reset --hard --quiet
-      WORKING_DIRECTORY "@work_dir@"
-      ${capture_output}
-    )
-    _ep_accumulate_captured_output()
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" stash pop --quiet
-      WORKING_DIRECTORY "@work_dir@"
-      RESULT_VARIABLE error_code
-      ${capture_output}
-    )
-    _ep_accumulate_captured_output()
-    if(error_code)
-      # Stash pop failed: Restore previous state.
-      execute_process(
-        COMMAND "@git_EXECUTABLE@" reset --hard --quiet ${head_sha}
-        WORKING_DIRECTORY "@work_dir@"
-        ${capture_output}
-      )
-      _ep_accumulate_captured_output()
-      execute_process(
-        COMMAND "@git_EXECUTABLE@" stash pop --index --quiet
-        WORKING_DIRECTORY "@work_dir@"
-        ${capture_output}
-      )
-      _ep_accumulate_captured_output()
-      _ep_message_quiet_capture(FATAL_ERROR
-        "Failed to unstash changes in: '@work_dir@'.\n"
-        "You will have to resolve the conflicts manually"
-      )
-    endif()
-  endif()
-endif()
-
-set(init_submodules "@init_submodules@")
-if(init_submodules)
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" submodule update @git_submodules_recurse@ --init @git_submodules@
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    ${capture_output}
-  )
-  _ep_command_check_result(error_code)
-endif()
diff --git a/Modules/ExternalProject/hgclone.cmake.in b/Modules/ExternalProject/hgclone.cmake.in
deleted file mode 100644
index 9a574d201c..0000000000
--- a/Modules/ExternalProject/hgclone.cmake.in
+++ /dev/null
@@ -1,59 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-if(EXISTS "@hgclone_stampfile@" AND EXISTS "@hgclone_infofile@" AND
-   "@hgclone_stampfile@" IS_NEWER_THAN "@hgclone_infofile@")
-  if(NOT quiet)
-    message(STATUS
-      "Avoiding repeated hg clone, stamp file is up to date: "
-      "'@hgclone_stampfile@'"
-    )
-  endif()
-  return()
-endif()
-
-execute_process(
-  COMMAND ${CMAKE_COMMAND} -E rm -rf "@source_dir@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to remove directory: '@source_dir@'"
-)
-
-execute_process(
-  COMMAND "@hg_EXECUTABLE@" clone -U "@hg_repository@" "@src_name@"
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to clone repository: '@hg_repository@'"
-)
-
-execute_process(
-  COMMAND "@hg_EXECUTABLE@" update @hg_tag@
-  WORKING_DIRECTORY "@work_dir@/@src_name@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to checkout tag: '@hg_tag@'"
-)
-
-# Complete success, update the script-last-run stamp file:
-#
-execute_process(
-  COMMAND ${CMAKE_COMMAND} -E copy "@hgclone_infofile@" "@hgclone_stampfile@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(
-  error_code "Failed to copy script-last-run stamp file: '@hgclone_stampfile@'"
-)
diff --git a/Modules/ExternalProject/hgupdate.cmake.in b/Modules/ExternalProject/hgupdate.cmake.in
deleted file mode 100644
index a82a819f47..0000000000
--- a/Modules/ExternalProject/hgupdate.cmake.in
+++ /dev/null
@@ -1,24 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.19)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-execute_process(
-  COMMAND "@hg_EXECUTABLE@" pull
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(error_code)
-
-execute_process(
-  COMMAND "@hg_EXECUTABLE@" update @hg_tag@
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE error_code
-  ${capture_output}
-)
-_ep_command_check_result(error_code)
diff --git a/Modules/ExternalProject/mkdirs.cmake.in b/Modules/ExternalProject/mkdirs.cmake.in
deleted file mode 100644
index 73e80fad29..0000000000
--- a/Modules/ExternalProject/mkdirs.cmake.in
+++ /dev/null
@@ -1,19 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-file(MAKE_DIRECTORY
-  "@source_dir@"
-  "@binary_dir@"
-  "@install_dir@"
-  "@tmp_dir@"
-  "@stamp_dir@"
-  "@download_dir@"
-  "@log_dir@"
-)
-
-set(configSubDirs @CMAKE_CONFIGURATION_TYPES@)
-foreach(subDir IN LISTS configSubDirs)
-  file(MAKE_DIRECTORY "@stamp_dir@/${subDir}")
-endforeach()
diff --git a/Modules/ExternalProject/verify.cmake.in b/Modules/ExternalProject/verify.cmake.in
deleted file mode 100644
index cd34ba95ea..0000000000
--- a/Modules/ExternalProject/verify.cmake.in
+++ /dev/null
@@ -1,58 +0,0 @@
-# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-# file Copyright.txt or https://cmake.org/licensing for details.
-
-cmake_minimum_required(VERSION 3.5)
-
-set(quiet "@quiet@")
-set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
-include(${script_dir}/captured_process_setup.cmake)
-
-if("@LOCAL@" STREQUAL "")
-  message(FATAL_ERROR "LOCAL can't be empty")
-endif()
-
-if(NOT EXISTS "@LOCAL@")
-  message(FATAL_ERROR "File not found: @LOCAL@")
-endif()
-
-function(do_verify)
-  if("@ALGO@" STREQUAL "")
-    _ep_message_quiet_capture(WARNING
-      "File will not be verified since no URL_HASH specified"
-    )
-    set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-    return()
-  endif()
-
-  if("@EXPECT_VALUE@" STREQUAL "")
-    _ep_message_quiet_capture(FATAL_ERROR "EXPECT_VALUE can't be empty")
-  endif()
-
-  _ep_message_quiet_capture(STATUS
-"verifying file...
-     file='@LOCAL@'"
-  )
-  set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-
-  file("@ALGO@" "@LOCAL@" actual_value)
-
-  if(NOT "${actual_value}" STREQUAL "@EXPECT_VALUE@")
-    _ep_message_quiet_capture(FATAL_ERROR
-"error: @ALGO@ hash of
-  @LOCAL@
-does not match expected value
-  expected: '@EXPECT_VALUE@'
-    actual: '${actual_value}'
-")
-  endif()
-
-  _ep_message_quiet_capture(STATUS "verifying file... done")
-  set(accumulated_output "${accumulated_output}" PARENT_SCOPE)
-endfunction()
-
-do_verify()
-
-set(extract_script "@extract_script_filename@")
-if(NOT "${extract_script}" STREQUAL "")
-  include("${extract_script}")
-endif()