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# ctest_update

Perform the CTest Update Step as a Dashboard Client.

    ctest_update([SOURCE <source-dir>] [RETURN_VALUE <result-var>] [QUIET])

Update the source tree from version control and record results in `Update.xml` for submission with the `ctest_submit()` command.

The options are:

`SOURCE <source-dir>`
  Specify the source directory. If not given, the `CTEST_SOURCE_DIRECTORY` variable is used.
`RETURN_VALUE <result-var>`
  Store in the `<result-var>` variable the number of files updated or `-1` on error.
`QUIET`
  Tell CTest to suppress most non-error messages that it would have otherwise printed to the console. CTest will still report the new revision of the repository and any conflicting files that were found.

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