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authorRyan Prichard <rprichard@google.com>2022-01-13 17:30:19 -0800
committerRyan Prichard <rprichard@google.com>2022-01-13 17:31:05 -0800
commitf6283abb0a655968016437be07d04370fd815e6c (patch)
tree939c8ec9b01b0e533cd19239f516224369ef9d0b /share/cmake-3.22/Modules/ExternalProject-gitupdate.cmake.in
parent38f8f35a5d463a866584b900146cc2986c6d16bc (diff)
downloadwindows-x86-f6283abb0a655968016437be07d04370fd815e6c.tar.gz
Fusion2: http://fusion2/2669b740-21e9-4d31-99f2-25f047c33f53 GCS path: gs://ndk-kokoro-release-artifacts/prod/ndk/cmake/windows_release/3/20211215-131021 Prebuilt updated using: ndk/scripts/update_kokoro_prebuilts.py Test: Treehugger, Kokoro presubmit Bug: http://b/213946898 Change-Id: Ie5521d3e7002eae5824acc69c0368ef328245d8e
Diffstat (limited to 'share/cmake-3.22/Modules/ExternalProject-gitupdate.cmake.in')
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1 files changed, 277 insertions, 0 deletions
diff --git a/share/cmake-3.22/Modules/ExternalProject-gitupdate.cmake.in b/share/cmake-3.22/Modules/ExternalProject-gitupdate.cmake.in
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index 0000000..0de2372
--- /dev/null
+++ b/share/cmake-3.22/Modules/ExternalProject-gitupdate.cmake.in
@@ -0,0 +1,277 @@
+# 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()