ExternalProject: Verify when a fetch occurs during update test.
The performance feature of only performing a git fetch when needed during the ExternalProject update step is verified during the test. A fetch is identified by removing the FETCH_HEAD file and checking for its reincarnation.
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@ -1,7 +1,15 @@
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# Set the ExternalProject GIT_TAG to desired_tag, and make sure the
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# resulting checked out version is resulting_sha and a rebuild.
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# This check's the viability of the ExternalProject UPDATE_COMMAND.
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macro(check_a_tag desired_tag resulting_sha)
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# resulting checked out version is resulting_sha and rebuild.
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# This check's the correct behavior of the ExternalProject UPDATE_COMMAND.
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# Also verify that a fetch only occurs when fetch_expected is 1.
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macro(check_a_tag desired_tag resulting_sha fetch_expected)
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message( STATUS "Checking ExternalProjectUpdate to tag: ${desired_tag}" )
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# Remove the FETCH_HEAD file, so we can check if it gets replaced with a 'git
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# fetch'.
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set( FETCH_HEAD_file ${ExternalProjectUpdate_BINARY_DIR}/CMakeExternals/Source/TutorialStep1-GIT/.git/FETCH_HEAD )
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file( REMOVE ${FETCH_HEAD_file} )
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# Configure
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execute_process(COMMAND ${CMAKE_COMMAND}
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-G ${CMAKE_TEST_GENERATOR}
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@ -43,18 +51,26 @@ when
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was expected."
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)
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endif()
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if( NOT EXISTS ${FETCH_HEAD_file} AND ${fetch_expected})
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message( FATAL_ERROR "Fetch did NOT occur when it was expected.")
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endif()
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if( EXISTS ${FETCH_HEAD_file} AND NOT ${fetch_expected})
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message( FATAL_ERROR "Fetch DID occur when it was not expected.")
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endif()
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endmacro()
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find_package(Git)
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if(GIT_EXECUTABLE)
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
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check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a)
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7 1)
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check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a 1)
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# With the Git UPDATE_COMMAND performance patch, this will not required a
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# 'git fetch'
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check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a)
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check_a_tag(tag2 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
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check_a_tag(d19707303 d1970730310fe8bc07e73f15dc570071f9f9654a)
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
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check_a_tag(tag1 d1970730310fe8bc07e73f15dc570071f9f9654a 0)
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check_a_tag(tag2 5842b503ba4113976d9bb28d57b5aee1ad2736b7 1)
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check_a_tag(d19707303 d1970730310fe8bc07e73f15dc570071f9f9654a 1)
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check_a_tag(d19707303 d1970730310fe8bc07e73f15dc570071f9f9654a 0)
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7 1)
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# This is a remote symbolic ref, so it will always trigger a 'git fetch'
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7)
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check_a_tag(origin/master 5842b503ba4113976d9bb28d57b5aee1ad2736b7 1)
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endif()
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