CMake/Modules/ExternalProject/gitclone.cmake.in

# 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@'"
)