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ctest_update
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------------
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Perform the :ref:`CTest Update Step` as a :ref:`Dashboard Client`.
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::
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ctest_update([SOURCE <source-dir>]
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[RETURN_VALUE <result-var>]
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[CAPTURE_CMAKE_ERROR <result-var>]
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[QUIET])
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Update the source tree from version control and record results in
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``Update.xml`` for submission with the :command:`ctest_submit` command.
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The options are:
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``SOURCE <source-dir>``
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Specify the source directory. If not given, the
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:variable:`CTEST_SOURCE_DIRECTORY` variable is used.
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``RETURN_VALUE <result-var>``
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Store in the ``<result-var>`` variable the number of files
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updated or ``-1`` on error.
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``CAPTURE_CMAKE_ERROR <result-var>``
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Store in the ``<result-var>`` variable -1 if there are any errors running
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the command and prevent ctest from returning non-zero if an error occurs.
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``QUIET``
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Tell CTest to suppress most non-error messages that it would
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have otherwise printed to the console. CTest will still report
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the new revision of the repository and any conflicting files
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that were found.
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The update always follows the version control branch currently checked
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out in the source directory. See the :ref:`CTest Update Step`
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documentation for information about variables that change the behavior
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of ``ctest_update()``.
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