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# Set the ExternalProject GIT_TAG to desired_tag, and make sure the
# resulting checked out version is resulting_sha and a rebuild.
# This check's the viability of the ExternalProject UPDATE_COMMAND.
macro(check_a_tag desired_tag resulting_sha)
# Configure
execute_process(COMMAND ${CMAKE_COMMAND}
-G ${CMAKE_TEST_GENERATOR}
-DTEST_GIT_TAG:STRING=${desired_tag}
${ExternalProjectUpdate_SOURCE_DIR}
WORKING_DIRECTORY ${ExternalProjectUpdate_BINARY_DIR}
RESULT_VARIABLE error_code
)
if(error_code)
message(FATAL_ERROR "Could not configure the project.")
endif()
# Build
execute_process(COMMAND ${CMAKE_COMMAND}
--build ${ExternalProjectUpdate_BINARY_DIR}
RESULT_VARIABLE error_code
)
if(error_code)
message(FATAL_ERROR "Could not build the project.")
endif()
# Check the resulting SHA
execute_process(COMMAND ${GIT_EXECUTABLE}
rev-list --max-count=1 HEAD
WORKING_DIRECTORY ${ExternalProjectUpdate_BINARY_DIR}/CMakeExternals/Source/TutorialStep1-GIT
RESULT_VARIABLE error_code
OUTPUT_VARIABLE tag_sha
)
if(error_code)
message(FATAL_ERROR "Could not check the sha.")
endif()
string(STRIP "${tag_sha}" tag_sha)
if(NOT (${tag_sha} STREQUAL ${resulting_sha}))
message(FATAL_ERROR "UPDATE_COMMAND produced
${tag_sha}
when
${resulting_sha}
was expected."
)
endif()
endmacro()
find_package(Git)
if(GIT_EXECUTABLE)
check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a)
# With the Git UPDATE_COMMAND performance patch, this will not required a
# 'git fetch'
check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a)
check_a_tag(tag2 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
check_a_tag(d19707303 d1970730310fe8bc07e73f15dc570071f9f9654a)
check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
endif()
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