Merge topic 'doc-ctest-settings'

2d57a390 Help: Document ctest dashboard client usage
28f73dff Help: Document ctest_start initial checkout command variables

3 files changed, 609 insertions, 0 deletions

diff --git a/Help/command/ctest_start.rst b/Help/command/ctest_start.rst
index f16142e..b5c7a17 100644
--- a/Help/command/ctest_start.rst
+++ b/Help/command/ctest_start.rst
@@ -14,3 +14,9 @@ CTEST_SOURCE_DIRECTORY and CTEST_BINARY_DIRECTORY.  If the track is
 specified, the submissions will go to the specified track.  If APPEND
 is used, the existing TAG is used rather than creating a new one based
 on the current time stamp.
+
+If the ``CTEST_CHECKOUT_COMMAND`` variable (or the ``CTEST_CVS_CHECKOUT``
+variable) is set, its content is treated as command-line.  The command is
+invoked with the current working directory set to the parent of the source
+directory, even if the source directory already exists.  This can be used
+to create the source tree from a version control repository.
diff --git a/Help/manual/cmake-commands.7.rst b/Help/manual/cmake-commands.7.rst
index 17c3236..8ff73a4 100644
--- a/Help/manual/cmake-commands.7.rst
+++ b/Help/manual/cmake-commands.7.rst
@@ -128,6 +128,8 @@ versions of CMake.  Do not use them in new code.
    /command/variable_requires
    /command/write_file
 
+.. _`CTest Commands`:
+
 CTest Commands
 ==============
 
diff --git a/Help/manual/ctest.1.rst b/Help/manual/ctest.1.rst
index 60d08dd..6fb4e82 100644
--- a/Help/manual/ctest.1.rst
+++ b/Help/manual/ctest.1.rst
@@ -365,6 +365,607 @@ Options
 
 .. include:: OPTIONS_HELP.txt
 
+Dashboard Client
+================
+
+CTest can operate as a client for the `CDash`_ software quality dashboard
+application.  As a dashboard client, CTest performs a sequence of steps
+to configure, build, and test software, and then submits the results to
+a `CDash`_ server.
+
+.. _`CDash`: http://cdash.org/
+
+Dashboard Client Steps
+----------------------
+
+CTest defines an ordered list of testing steps of which some or all may
+be run as a dashboard client:
+
+``Start``
+  Start a new dashboard submission to be composed of results recorded
+  by the following steps.
+  See the `CTest Start Step`_ section below.
+
+``Update``
+  Update the source tree from its version control repository.
+  Record the old and new versions and the list of updated source files.
+  See the `CTest Update Step`_ section below.
+
+``Configure``
+  Configure the software by running a command in the build tree.
+  Record the configuration output log.
+  See the `CTest Configure Step`_ section below.
+
+``Build``
+  Build the software by running a command in the build tree.
+  Record the build output log and detect warnings and errors.
+  See the `CTest Build Step`_ section below.
+
+``Test``
+  Test the software by loading a ``CTestTestfile.cmake``
+  from the build tree and executing the defined tests.
+  Record the output and result of each test.
+  See the `CTest Test Step`_ section below.
+
+``Coverage``
+  Compute coverage of the source code by running a coverage
+  analysis tool and recording its output.
+  See the `CTest Coverage Step`_ section below.
+
+``MemCheck``
+  Run the software test suite through a memory check tool.
+  Record the test output, results, and issues reported by the tool.
+  See the `CTest MemCheck Step`_ section below.
+
+``Submit``
+  Submit results recorded from other testing steps to the
+  software quality dashboard server.
+  See the `CTest Submit Step`_ section below.
+
+Dashboard Client Modes
+----------------------
+
+CTest defines three modes of operation as a dashboard client:
+
+``Nightly``
+  This mode is intended to be invoked once per day, typically at night.
+  It enables the ``Start``, ``Update``, ``Configure``, ``Build``, ``Test``,
+  ``Coverage``, and ``Submit`` steps by default.  Selected steps run even
+  if the ``Update`` step reports no changes to the source tree.
+
+``Continuous``
+  This mode is intended to be invoked repeatedly throughout the day.
+  It enables the ``Start``, ``Update``, ``Configure``, ``Build``, ``Test``,
+  ``Coverage``, and ``Submit`` steps by default, but exits after the
+  ``Update`` step if it reports no changes to the source tree.
+
+``Experimental``
+  This mode is intended to be invoked by a developer to test local changes.
+  It enables the ``Start``, ``Configure``, ``Build``, ``Test``, ``Coverage``,
+  and ``Submit`` steps by default.
+
+Dashboard Client via CTest Command-Line
+---------------------------------------
+
+CTest can perform testing on an already-generated build tree.
+Run the ``ctest`` command with the current working directory set
+to the build tree and use one of these signatures::
+
+  ctest -D <mode>[<step>]
+  ctest -M <mode> [ -T <step> ]...
+
+The ``<mode>`` must be one of the above `Dashboard Client Modes`_,
+and each ``<step>`` must be one of the above `Dashboard Client Steps`_.
+
+CTest reads the `Dashboard Client Configuration`_ settings from
+a file in the build tree called either ``CTestConfiguration.ini``
+or ``DartConfiguration.tcl`` (the names are historical).  The format
+of the file is::
+
+  # Lines starting in '#' are comments.
+  # Other non-blank lines are key-value pairs.
+  <setting>: <value>
+
+where ``<setting>`` is the setting name and ``<value>`` is the
+setting value.
+
+In build trees generated by CMake, this configuration file is
+generated by the :module:`CTest` module if included by the project.
+The module uses variables to obtain a value for each setting
+as documented with the settings below.
+
+.. _`CTest Script`:
+
+Dashboard Client via CTest Script
+---------------------------------
+
+CTest can perform testing driven by a :manual:`cmake-language(7)`
+script that creates and maintains the source and build tree as
+well as performing the testing steps.  Run the ``ctest`` command
+with the current working directory set outside of any build tree
+and use one of these signatures::
+
+  ctest -S <script>
+  ctest -SP <script>
+
+The ``<script>`` file must call :ref:`CTest Commands` commands
+to run testing steps explicitly as documented below.  The commands
+obtain `Dashboard Client Configuration`_ settings from their
+arguments or from variables set in the script.
+
+Dashboard Client Configuration
+==============================
+
+The `Dashboard Client Steps`_ may be configured by named
+settings as documented in the following sections.
+
+.. _`CTest Start Step`:
+
+CTest Start Step
+----------------
+
+Start a new dashboard submission to be composed of results recorded
+by the following steps.
+
+In a `CTest Script`_, the :command:`ctest_start` command runs this step.
+Arguments to the command may specify some of the step settings.
+The command first runs the command-line specified by the
+``CTEST_CHECKOUT_COMMAND`` variable, if set, to initialize the source
+directory.
+
+Configuration settings include:
+
+``BuildDirectory``
+  The full path to the project build tree.
+
+  * `CTest Script`_ variable: ``CTEST_BINARY_DIRECTORY``
+  * :module:`CTest` module variable: :variable:`PROJECT_BINARY_DIR`
+
+``SourceDirectory``
+  The full path to the project source tree.
+
+  * `CTest Script`_ variable: ``CTEST_SOURCE_DIRECTORY``
+  * :module:`CTest` module variable: :variable:`PROJECT_SOURCE_DIR`
+
+.. _`CTest Update Step`:
+
+CTest Update Step
+-----------------
+
+In a `CTest Script`_, the :command:`ctest_update` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings to specify the version control tool include:
+
+``BZRCommand``
+  ``bzr`` command-line tool to use if source tree is managed by Bazaar.
+
+  * `CTest Script`_ variable: ``CTEST_BZR_COMMAND``
+  * :module:`CTest` module variable: none
+
+``BZRUpdateOptions``
+  Command-line options to the ``BZRCommand`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_BZR_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: none
+
+``CVSCommand``
+  ``cvs`` command-line tool to use if source tree is managed by CVS.
+
+  * `CTest Script`_ variable: ``CTEST_CVS_COMMAND``
+  * :module:`CTest` module variable: ``CVSCOMMAND``
+
+``CVSUpdateOptions``
+  Command-line options to the ``CVSCommand`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_CVS_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: ``CVS_UPDATE_OPTIONS``
+
+``GITCommand``
+  ``git`` command-line tool to use if source tree is managed by Git.
+
+  * `CTest Script`_ variable: ``CTEST_GIT_COMMAND``
+  * :module:`CTest` module variable: ``GITCOMMAND``
+
+``GITUpdateCustom``
+  Specify a semicolon-separated list of custom command lines to run
+  in the source tree (Git work tree) to update it instead of running
+  the ``GITCommand``.
+
+  * `CTest Script`_ variable: ``CTEST_GIT_UPDATE_CUSTOM``
+  * :module:`CTest` module variable: ``CTEST_GIT_UPDATE_CUSTOM``
+
+``GITUpdateOptions``
+  Command-line options to the ``GITCommand`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_GIT_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: ``GIT_UPDATE_OPTIONS``
+
+``HGCommand``
+  ``hg`` command-line tool to use if source tree is managed by Mercurial.
+
+  * `CTest Script`_ variable: ``CTEST_HG_COMMAND``
+  * :module:`CTest` module variable: none
+
+``HGUpdateOptions``
+  Command-line options to the ``HGCommand`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_HG_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: none
+
+``P4Client``
+  Value of the ``-c`` option to the ``P4Command``.
+
+  * `CTest Script`_ variable: ``CTEST_P4_CLIENT``
+  * :module:`CTest` module variable: ``CTEST_P4_CLIENT``
+
+``P4Command``
+  ``p4`` command-line tool to use if source tree is managed by Perforce.
+
+  * `CTest Script`_ variable: ``CTEST_P4_COMMAND``
+  * :module:`CTest` module variable: ``P4COMMAND``
+
+``P4Options``
+  Command-line options to the ``P4Command`` for all invocations.
+
+  * `CTest Script`_ variable: ``CTEST_P4_OPTIONS``
+  * :module:`CTest` module variable: ``CTEST_P4_OPTIONS``
+
+``P4UpdateCustom``
+  Specify a semicolon-separated list of custom command lines to run
+  in the source tree (Perforce tree) to update it instead of running
+  the ``P4Command``.
+
+  * `CTest Script`_ variable: none
+  * :module:`CTest` module variable: ``CTEST_P4_UPDATE_CUSTOM``
+
+``P4UpdateOptions``
+  Command-line options to the ``P4Command`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_P4_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: ``CTEST_P4_UPDATE_OPTIONS``
+
+``SVNCommand``
+  ``svn`` command-line tool to use if source tree is managed by Subversion.
+
+  * `CTest Script`_ variable: ``CTEST_SVN_COMMAND``
+  * :module:`CTest` module variable: ``SVNCOMMAND``
+
+``SVNOptions``
+  Command-line options to the ``SVNCommand`` for all invocations.
+
+  * `CTest Script`_ variable: ``CTEST_SVN_OPTIONS``
+  * :module:`CTest` module variable: ``CTEST_SVN_OPTIONS``
+
+``SVNUpdateOptions``
+  Command-line options to the ``SVNCommand`` when updating the source.
+
+  * `CTest Script`_ variable: ``CTEST_SVN_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: ``SVN_UPDATE_OPTIONS``
+
+``UpdateCommand``
+  Specify the version-control command-line tool to use without
+  detecting the VCS that manages the source tree.
+
+  * `CTest Script`_ variable: ``CTEST_UPDATE_COMMAND``
+  * :module:`CTest` module variable: ``<VCS>COMMAND``
+    when ``UPDATE_TYPE`` is ``<vcs>``, else ``UPDATE_COMMAND``
+
+``UpdateOptions``
+  Command-line options to the ``UpdateCommand``.
+
+  * `CTest Script`_ variable: ``CTEST_UPDATE_OPTIONS``
+  * :module:`CTest` module variable: ``<VCS>_UPDATE_OPTIONS``
+    when ``UPDATE_TYPE`` is ``<vcs>``, else ``UPDATE_OPTIONS``
+
+``UpdateType``
+  Specify the version-control system that manages the source
+  tree if it cannot be detected automatically.
+  The value may be ``bzr``, ``cvs``, ``git``, ``hg``,
+  ``p4``, or ``svn``.
+
+  * `CTest Script`_ variable: none, detected from source tree
+  * :module:`CTest` module variable: ``UPDATE_TYPE`` if set,
+    else ``CTEST_UPDATE_TYPE``
+
+Additional configuration settings include:
+
+``NightlyStartTime``
+  In the ``Nightly`` dashboard mode, specify the "nightly start time".
+  With centralized version control systems (``cvs`` and ``svn``),
+  the ``Update`` step checks out the version of the software as of
+  this time so that multiple clients choose a common version to test.
+  This is not well-defined in distributed version-control systems so
+  the setting is ignored.
+
+  * `CTest Script`_ variable: ``CTEST_NIGHTLY_START_TIME``
+  * :module:`CTest` module variable: ``NIGHTLY_START_TIME`` if set,
+    else ``CTEST_NIGHTLY_START_TIME``
+
+.. _`CTest Configure Step`:
+
+CTest Configure Step
+--------------------
+
+In a `CTest Script`_, the :command:`ctest_configure` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``ConfigureCommand``
+  Command-line to launch the software configuration process.
+  It will be executed in the location specified by the
+  ``BuildDirectory`` setting.
+
+  * `CTest Script`_ variable: ``CTEST_CONFIGURE_COMMAND``
+  * :module:`CTest` module variable: :variable:`CMAKE_COMMAND`
+    followed by :variable:`PROJECT_SOURCE_DIR`
+
+.. _`CTest Build Step`:
+
+CTest Build Step
+----------------
+
+In a `CTest Script`_, the :command:`ctest_build` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``DefaultCTestConfigurationType``
+  When the build system to be launched allows build-time selection
+  of the configuration (e.g. ``Debug``, ``Release``), this specifies
+  the default configuration to be built when no ``-C`` option is
+  given to the ``ctest`` command.  The value will be substituted into
+  the value of ``MakeCommand`` to replace the literal string
+  ``${CTEST_CONFIGURATION_TYPE}`` if it appears.
+
+  * `CTest Script`_ variable: ``CTEST_CONFIGURATION_TYPE``
+  * :module:`CTest` module variable: ``DEFAULT_CTEST_CONFIGURATION_TYPE``,
+    initialized by the ``CMAKE_CONFIG_TYPE`` environment variable
+
+``MakeCommand``
+  Command-line to launch the software build process.
+  It will be executed in the location specified by the
+  ``BuildDirectory`` setting.
+
+  * `CTest Script`_ variable: ``CTEST_BUILD_COMMAND``
+  * :module:`CTest` module variable: ``MAKECOMMAND``,
+    initialized by the :command:`build_command` command
+
+``UseLaunchers``
+  For build trees generated by CMake using a Makefile generator
+  or the :generator:`Ninja` generator, specify whether the
+  ``CTEST_USE_LAUNCHERS`` feature is enabled by the
+  :module:`CTestUseLaunchers` module (also included by the
+  :module:`CTest` module).  When enabled, the generated build
+  system wraps each invocation of the compiler, linker, or
+  custom command line with a "launcher" that communicates
+  with CTest via environment variables and files to report
+  granular build warning and error information.  Otherwise,
+  CTest must "scrape" the build output log for diagnostics.
+
+  * `CTest Script`_ variable: ``CTEST_USE_LAUNCHERS``
+  * :module:`CTest` module variable: ``CTEST_USE_LAUNCHERS``
+
+.. _`CTest Test Step`:
+
+CTest Test Step
+---------------
+
+In a `CTest Script`_, the :command:`ctest_test` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``TimeOut``
+  The default timeout for each test if not specified by the
+  :prop_test:`TIMEOUT` test property.
+
+  * `CTest Script`_ variable: ``CTEST_TEST_TIMEOUT``
+  * :module:`CTest` module variable: ``DART_TESTING_TIMEOUT``
+
+.. _`CTest Coverage Step`:
+
+CTest Coverage Step
+-------------------
+
+In a `CTest Script`_, the :command:`ctest_coverage` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``CoverageCommand``
+  Command-line tool to perform software coverage analysis.
+  It will be executed in the location specified by the
+  ``BuildDirectory`` setting.
+
+  * `CTest Script`_ variable: ``CTEST_COVERAGE_COMMAND``
+  * :module:`CTest` module variable: ``COVERAGE_COMMAND``
+
+``CoverageExtraFlags``
+  Specify command-line options to the ``CoverageCommand`` tool.
+
+  * `CTest Script`_ variable: ``CTEST_COVERAGE_EXTRA_FLAGS``
+  * :module:`CTest` module variable: ``COVERAGE_EXTRA_FLAGS``
+
+.. _`CTest MemCheck Step`:
+
+CTest MemCheck Step
+-------------------
+
+In a `CTest Script`_, the :command:`ctest_memcheck` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``MemoryCheckCommand``
+  Command-line tool to perform dynamic analysis.  Test command lines
+  will be launched through this tool.
+
+  * `CTest Script`_ variable: ``CTEST_MEMORYCHECK_COMMAND``
+  * :module:`CTest` module variable: ``MEMORYCHECK_COMMAND``
+
+``MemoryCheckCommandOptions``
+  Specify command-line options to the ``MemoryCheckCommand`` tool.
+  They will be placed prior to the test command line.
+
+  * `CTest Script`_ variable: ``CTEST_MEMORYCHECK_COMMAND_OPTIONS``
+  * :module:`CTest` module variable: ``MEMORYCHECK_COMMAND_OPTIONS``
+
+``MemoryCheckSuppressionFile``
+  Specify a file containing suppression rules for the
+  ``MemoryCheckCommand`` tool.  It will be passed with options
+  appropriate to the tool.
+
+  * `CTest Script`_ variable: ``CTEST_MEMORYCHECK_SUPPRESSIONS_FILE``
+  * :module:`CTest` module variable: ``MEMORYCHECK_SUPPRESSIONS_FILE``
+
+Additional configuration settings include:
+
+``BoundsCheckerCommand``
+  Specify a ``MemoryCheckCommand`` that is known to be command-line
+  compatible with Bounds Checker.
+
+  * `CTest Script`_ variable: none
+  * :module:`CTest` module variable: none
+
+``PurifyCommand``
+  Specify a ``MemoryCheckCommand`` that is known to be command-line
+  compatible with Purify.
+
+  * `CTest Script`_ variable: none
+  * :module:`CTest` module variable: ``PURIFYCOMMAND``
+
+``ValgrindCommand``
+  Specify a ``MemoryCheckCommand`` that is known to be command-line
+  compatible with Valgrind.
+
+  * `CTest Script`_ variable: none
+  * :module:`CTest` module variable: ``VALGRIND_COMMAND``
+
+``ValgrindCommandOptions``
+  Specify command-line options to the ``ValgrindCommand`` tool.
+  They will be placed prior to the test command line.
+
+  * `CTest Script`_ variable: none
+  * :module:`CTest` module variable: ``VALGRIND_COMMAND_OPTIONS``
+
+.. _`CTest Submit Step`:
+
+CTest Submit Step
+-----------------
+
+In a `CTest Script`_, the :command:`ctest_submit` command runs this step.
+Arguments to the command may specify some of the step settings.
+
+Configuration settings include:
+
+``BuildName``
+  Describe the dashboard client platform with a short string.
+  (Operating system, compiler, etc.)
+
+  * `CTest Script`_ variable: ``CTEST_BUILD_NAME``
+  * :module:`CTest` module variable: ``BUILDNAME``
+
+``CDashVersion``
+  Specify the version of `CDash`_ on the server.
+
+  * `CTest Script`_ variable: none, detected from server
+  * :module:`CTest` module variable: ``CTEST_CDASH_VERSION``
+
+``CTestSubmitRetryCount``
+  Specify a number of attempts to retry submission on network failure.
+
+  * `CTest Script`_ variable: none,
+    use the :command:`ctest_submit` ``RETRY_COUNT`` option.
+  * :module:`CTest` module variable: ``CTEST_SUBMIT_RETRY_COUNT``
+
+``CTestSubmitRetryDelay``
+  Specify a delay before retrying submission on network failure.
+
+  * `CTest Script`_ variable: none,
+    use the :command:`ctest_submit` ``RETRY_DELAY`` option.
+  * :module:`CTest` module variable: ``CTEST_SUBMIT_RETRY_DELAY``
+
+``CurlOptions``
+  Specify a semicolon-separated list of options to control the
+  Curl library that CTest uses internally to connect to the
+  server.  Possible options are ``CURLOPT_SSL_VERIFYPEER_OFF``
+  and ``CURLOPT_SSL_VERIFYHOST_OFF``.
+
+  * `CTest Script`_ variable: ``CTEST_CURL_OPTIONS``
+  * :module:`CTest` module variable: ``CTEST_CURL_OPTIONS``
+
+``DropLocation``
+  The path on the dashboard server to send the submission.
+
+  * `CTest Script`_ variable: ``CTEST_DROP_LOCATION``
+  * :module:`CTest` module variable: ``DROP_LOCATION`` if set,
+    else ``CTEST_DROP_LOCATION``
+
+``DropMethod``
+  Specify the method by which results should be submitted to the
+  dashboard server.  The value may be ``cp``, ``ftp``, ``http``,
+  ``https``, ``scp``, or ``xmlrpc`` (if CMake was built with
+  support for it).
+
+  * `CTest Script`_ variable: ``CTEST_DROP_METHOD``
+  * :module:`CTest` module variable: ``DROP_METHOD`` if set,
+    else ``CTEST_DROP_METHOD``
+
+``DropSite``
+  The dashboard server name
+  (for ``ftp``, ``http``, and ``https``, ``scp``, and ``xmlrpc``).
+
+  * `CTest Script`_ variable: ``CTEST_DROP_SITE``
+  * :module:`CTest` module variable: ``DROP_SITE`` if set,
+    else ``CTEST_DROP_SITE``
+
+``DropSitePassword``
+  The dashboard server login password, if any
+  (for ``ftp``, ``http``, and ``https``).
+
+  * `CTest Script`_ variable: ``CTEST_DROP_SITE_PASSWORD``
+  * :module:`CTest` module variable: ``DROP_SITE_PASSWORD`` if set,
+    else ``CTEST_DROP_SITE_PASWORD``
+
+``DropSiteUser``
+  The dashboard server login user name, if any
+  (for ``ftp``, ``http``, and ``https``).
+
+  * `CTest Script`_ variable: ``CTEST_DROP_SITE_USER``
+  * :module:`CTest` module variable: ``DROP_SITE_USER`` if set,
+    else ``CTEST_DROP_SITE_USER``
+
+``IsCDash``
+  Specify whether the dashboard server is `CDash`_ or an older
+  dashboard server implementation requiring ``TriggerSite``.
+
+  * `CTest Script`_ variable: ``CTEST_DROP_SITE_CDASH``
+  * :module:`CTest` module variable: ``CTEST_DROP_SITE_CDASH``
+
+``ScpCommand``
+  ``scp`` command-line tool to use when ``DropMethod`` is ``scp``.
+
+  * `CTest Script`_ variable: ``CTEST_SCP_COMMAND``
+  * :module:`CTest` module variable: ``SCPCOMMAND``
+
+``Site``
+  Describe the dashboard client host site with a short string.
+  (Hostname, domain, etc.)
+
+  * `CTest Script`_ variable: ``CTEST_SITE``
+  * :module:`CTest` module variable: ``SITE``,
+    initialized by the :command:`site_name` command
+
+``TriggerSite``
+  Legacy option to support older dashboard server implementations.
+  Not used when ``IsCDash`` is true.
+
+  * `CTest Script`_ variable: ``CTEST_TRIGGER_SITE``
+  * :module:`CTest` module variable: ``TRIGGER_SITE`` if set,
+    else ``CTEST_TRIGGER_SITE``
+
 See Also
 ========