ExternalProject: Move existing step scripts to separate subdirectory

This is in preparation for moving more inline content to separate
scripts as well. Having them in a separate subdirectory is consistent
with other modules and will make them easier to find and work with.

1 files changed, 0 insertions, 277 deletions

diff --git a/Modules/ExternalProject-gitupdate.cmake.in b/Modules/ExternalProject-gitupdate.cmake.in
deleted file mode 100644
index 0de2372..0000000
--- a/Modules/ExternalProject-gitupdate.cmake.in
+++ /dev/null
@@ -1,277 +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)
-
-function(get_hash_for_ref ref out_var err_var)
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" rev-parse "${ref}^0"
-    WORKING_DIRECTORY "@work_dir@"
-    RESULT_VARIABLE error_code
-    OUTPUT_VARIABLE ref_hash
-    ERROR_VARIABLE error_msg
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-  )
-  if(error_code)
-    set(${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)
-    message(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
-    message(VERBOSE "Already at requested ref: ${tag_sha}")
-    return()
-
-  elseif(tag_sha STREQUAL "")
-    # We don't know about this ref yet, so we have no choice but to fetch.
-    # We deliberately swallow any error message at the default log level
-    # because it can be confusing for users to see a failed git command.
-    # That failure is being handled here, so it isn't an error.
-    set(fetch_required YES)
-    set(checkout_name "@git_tag@")
-    if(NOT error_msg STREQUAL "")
-      message(VERBOSE "${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 "")
-      message(WARNING "${error_msg}")
-    endif()
-
-  endif()
-endif()
-
-if(fetch_required)
-  message(VERBOSE "Fetching latest from the remote @git_remote_name@")
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" fetch --tags --force "@git_remote_name@"
-    WORKING_DIRECTORY "@work_dir@"
-    COMMAND_ERROR_IS_FATAL ANY
-  )
-endif()
-
-set(git_update_strategy "@git_update_strategy@")
-if(git_update_strategy STREQUAL "")
-  # Backward compatibility requires REBASE as the default behavior
-  set(git_update_strategy REBASE)
-endif()
-
-if(git_update_strategy MATCHES "^REBASE(_CHECKOUT)?$")
-  # 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@"
-      OUTPUT_VARIABLE upstream_branch
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-      COMMAND_ERROR_IS_FATAL ANY  # There is no error if no upstream is set
-    )
-    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")
-  message(FATAL_ERROR "Unsupported git update strategy: ${git_update_strategy}")
-endif()
-
-
-# Check if stash is needed
-execute_process(
-  COMMAND "@git_EXECUTABLE@" status --porcelain
-  WORKING_DIRECTORY "@work_dir@"
-  RESULT_VARIABLE error_code
-  OUTPUT_VARIABLE repo_status
-)
-if(error_code)
-  message(FATAL_ERROR "Failed to get the status")
-endif()
-string(LENGTH "${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@"
-    COMMAND_ERROR_IS_FATAL ANY
-  )
-endif()
-
-if(git_update_strategy STREQUAL "CHECKOUT")
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" checkout "${checkout_name}"
-    WORKING_DIRECTORY "@work_dir@"
-    COMMAND_ERROR_IS_FATAL ANY
-  )
-else()
-  execute_process(
-    COMMAND "@git_EXECUTABLE@" rebase "${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()
-      message(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}")
-    message(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}"
-              ${tag_name}
-      WORKING_DIRECTORY "@work_dir@"
-      COMMAND_ERROR_IS_FATAL ANY
-    )
-
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" checkout "${checkout_name}"
-      WORKING_DIRECTORY "@work_dir@"
-      COMMAND_ERROR_IS_FATAL ANY
-    )
-  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
-    )
-  if(error_code)
-    # Stash pop --index failed: Try again dropping the index
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" reset --hard --quiet
-      WORKING_DIRECTORY "@work_dir@"
-    )
-    execute_process(
-      COMMAND "@git_EXECUTABLE@" stash pop --quiet
-      WORKING_DIRECTORY "@work_dir@"
-      RESULT_VARIABLE error_code
-    )
-    if(error_code)
-      # Stash pop failed: Restore previous state.
-      execute_process(
-        COMMAND "@git_EXECUTABLE@" reset --hard --quiet ${head_sha}
-        WORKING_DIRECTORY "@work_dir@"
-      )
-      execute_process(
-        COMMAND "@git_EXECUTABLE@" stash pop --index --quiet
-        WORKING_DIRECTORY "@work_dir@"
-      )
-      message(FATAL_ERROR "\nFailed to unstash changes in: '@work_dir@'."
-                          "\nYou 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@"
-    COMMAND_ERROR_IS_FATAL ANY
-  )
-endif()