| # 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) |
| |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" rev-list --max-count=1 HEAD |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| OUTPUT_VARIABLE head_sha |
| OUTPUT_STRIP_TRAILING_WHITESPACE |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to get the hash for HEAD") |
| endif() |
| |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" show-ref "@git_tag@" |
| WORKING_DIRECTORY "@work_dir@" |
| OUTPUT_VARIABLE show_ref_output |
| ) |
| # If a remote ref is asked for, which can possibly move around, |
| # we must always do a fetch and checkout. |
| if("${show_ref_output}" MATCHES "remotes") |
| set(is_remote_ref 1) |
| else() |
| set(is_remote_ref 0) |
| endif() |
| |
| # Tag is in the form <remote>/<tag> (i.e. origin/master) we must strip |
| # the remote from the tag. |
| if("${show_ref_output}" MATCHES "refs/remotes/@git_tag@") |
| string(REGEX MATCH "^([^/]+)/(.+)$" _unused "@git_tag@") |
| set(git_remote "${CMAKE_MATCH_1}") |
| set(git_tag "${CMAKE_MATCH_2}") |
| else() |
| set(git_remote "@git_remote_name@") |
| set(git_tag "@git_tag@") |
| endif() |
| |
| # This will fail if the tag does not exist (it probably has not been fetched |
| # yet). |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" rev-list --max-count=1 "${git_tag}" |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| OUTPUT_VARIABLE tag_sha |
| OUTPUT_STRIP_TRAILING_WHITESPACE |
| ) |
| |
| # Is the hash checkout out that we want? |
| if(error_code OR is_remote_ref OR NOT ("${tag_sha}" STREQUAL "${head_sha}")) |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" fetch |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to fetch repository '@git_repository@'") |
| endif() |
| |
| if(is_remote_ref) |
| # 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 "${repo_status}" need_stash) |
| |
| # If not in clean state, stash changes in order to be able to perform a |
| # rebase or checkout without losing those changes permanently |
| if(need_stash) |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" stash save @git_stash_save_options@ |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to stash changes") |
| endif() |
| endif() |
| |
| if("@git_update_strategy@" STREQUAL "CHECKOUT") |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" checkout "${git_remote}/${git_tag}" |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to checkout tag: '${git_remote}/${git_tag}'") |
| endif() |
| else() |
| # Pull changes from the remote branch |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" rebase "${git_remote}/${git_tag}" |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| OUTPUT_VARIABLE rebase_output |
| ERROR_VARIABLE rebase_output |
| ) |
| if(error_code) |
| # Rebase failed, undo the rebase attempt before continuing |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" rebase --abort |
| WORKING_DIRECTORY "@work_dir@" |
| ) |
| |
| if(NOT "@git_update_strategy@" STREQUAL "REBASE_CHECKOUT") |
| # Not allowed to do a checkout as a fallback, so cannot proceed |
| if(need_stash) |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" stash pop --index --quiet |
| WORKING_DIRECTORY "@work_dir@" |
| ) |
| endif() |
| message(FATAL_ERROR "\nFailed to rebase in: '@work_dir@'." |
| "\nOutput from the attempted rebase follows:" |
| "\n${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 ${git_remote}/${git_tag}" |
| ${tag_name} |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to add marker tag") |
| endif() |
| |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" checkout "${git_remote}/${git_tag}" |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to checkout : '${git_remote}/${git_tag}'") |
| endif() |
| |
| endif() |
| endif() |
| |
| if(need_stash) |
| 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@" |
| RESULT_VARIABLE error_code |
| ) |
| 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 ${head_sha} |
| WORKING_DIRECTORY "@work_dir@" |
| ) |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" stash pop --index --quiet |
| WORKING_DIRECTORY "@work_dir@" |
| ) |
| message(FATAL_ERROR "\nFailed to unstash changes in: '@work_dir@'." |
| "\nYou will have to resolve the conflicts manually") |
| endif() |
| endif() |
| endif() |
| else() |
| execute_process( |
| COMMAND "@git_EXECUTABLE@" checkout "${git_tag}" |
| WORKING_DIRECTORY "@work_dir@" |
| RESULT_VARIABLE error_code |
| ) |
| if(error_code) |
| message(FATAL_ERROR "Failed to checkout tag: '${git_tag}'") |
| 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 |
| ) |
| endif() |
| if(error_code) |
| message(FATAL_ERROR "Failed to update submodules in: '@work_dir@'") |
| endif() |
| endif() |