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When using a file system which only has second resolution timestamps, there is a reasonably high likelihood of timestamps being the same. The IS_NEWER_THAN test returns true when timestamps are the same, so don't redo downloads when they match exactly.
94 lines
2.9 KiB
CMake
94 lines
2.9 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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cmake_minimum_required(VERSION 3.5)
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set(quiet "@quiet@")
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set(script_dir "@CMAKE_CURRENT_FUNCTION_LIST_DIR@/ExternalProject")
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include(${script_dir}/captured_process_setup.cmake)
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if(EXISTS "@gitclone_stampfile@" AND EXISTS "@gitclone_infofile@" AND
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"@gitclone_stampfile@" IS_NEWER_THAN "@gitclone_infofile@")
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if(NOT quiet)
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message(STATUS
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"Avoiding repeated git clone, stamp file is up to date: "
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"'@gitclone_stampfile@'"
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)
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endif()
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return()
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endif()
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execute_process(
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COMMAND ${CMAKE_COMMAND} -E rm -rf "@source_dir@"
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RESULT_VARIABLE error_code
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${capture_output}
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)
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_ep_command_check_result(
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error_code "Failed to remove directory: '@source_dir@'"
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)
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# try the clone 3 times in case there is an odd git clone issue
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set(error_code 1)
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set(number_of_tries 0)
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while(error_code AND number_of_tries LESS 3)
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# If you are seeing the following call hang and you have QUIET enabled, try
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# turning QUIET off to show any output immediately. The command may be
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# blocking while waiting for user input (e.g. a password to a SSH key).
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execute_process(
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COMMAND "@git_EXECUTABLE@" @git_options@
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clone @git_clone_options@ "@git_repository@" "@src_name@"
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WORKING_DIRECTORY "@work_dir@"
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RESULT_VARIABLE error_code
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${capture_output}
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)
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if(NOT "${out_var}" STREQUAL "")
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string(APPEND accumulated_output "${out_var}\n")
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endif()
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math(EXPR number_of_tries "${number_of_tries} + 1")
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endwhile()
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if(number_of_tries GREATER 1)
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set(msg "Had to git clone more than once: ${number_of_tries} times.")
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if(quiet)
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string(APPEND accumulated_output "${msg}\n")
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else()
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message(STATUS "${msg}")
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endif()
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endif()
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_ep_command_check_result(
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error_code "Failed to clone repository: '@git_repository@'"
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)
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execute_process(
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COMMAND "@git_EXECUTABLE@" @git_options@
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checkout "@git_tag@" @git_checkout_explicit--@
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WORKING_DIRECTORY "@work_dir@/@src_name@"
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RESULT_VARIABLE error_code
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${capture_output}
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)
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_ep_command_check_result(error_code "Failed to checkout tag: '@git_tag@'")
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set(init_submodules @init_submodules@)
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if(init_submodules)
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execute_process(
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COMMAND "@git_EXECUTABLE@" @git_options@
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submodule update @git_submodules_recurse@ --init @git_submodules@
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WORKING_DIRECTORY "@work_dir@/@src_name@"
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RESULT_VARIABLE error_code
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${capture_output}
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)
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_ep_command_check_result(
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error_code "Failed to update submodules in: '@work_dir@/@src_name@'"
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)
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endif()
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# Complete success, update the script-last-run stamp file:
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#
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execute_process(
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COMMAND ${CMAKE_COMMAND} -E copy "@gitclone_infofile@" "@gitclone_stampfile@"
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RESULT_VARIABLE error_code
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${capture_output}
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)
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_ep_command_check_result(
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error_code "Failed to copy script-last-run stamp file: '@gitclone_stampfile@'"
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)
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