ctest: Include ChangeId in Update.xml
diff --git a/Source/CTest/cmCTestUpdateHandler.cxx b/Source/CTest/cmCTestUpdateHandler.cxx
index e3b7e9e..5cfc4a7 100644
--- a/Source/CTest/cmCTestUpdateHandler.cxx
+++ b/Source/CTest/cmCTestUpdateHandler.cxx
@@ -199,6 +199,10 @@
   xml.Element("UpdateCommand", vc->GetUpdateCommandLine());
   xml.Element("UpdateType",
               cmCTestUpdateHandlerUpdateToString(this->UpdateType));
+  std::string changeId = this->CTest->GetCTestConfiguration("ChangeId");
+  if (!changeId.empty()) {
+    xml.Element("ChangeId", changeId);
+  }
 
   bool loadedMods = vc->WriteXML(xml);
 
diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index 4973e55..2b78171 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -259,6 +259,7 @@
 add_RunCMake_test(ctest_test)
 add_RunCMake_test(ctest_disabled_test)
 add_RunCMake_test(ctest_skipped_test)
+add_RunCMake_test(ctest_update -DGIT_EXECUTABLE=${GIT_EXECUTABLE})
 add_RunCMake_test(ctest_upload)
 add_RunCMake_test(ctest_fixtures)
 add_RunCMake_test(file)
diff --git a/Tests/RunCMake/ctest_update/CMakeLists.txt.in b/Tests/RunCMake/ctest_update/CMakeLists.txt.in
new file mode 100644
index 0000000..ecf0e54
--- /dev/null
+++ b/Tests/RunCMake/ctest_update/CMakeLists.txt.in
@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.1)
+project(CTestTest@CASE_NAME@ NONE)
+include(CTest)
+@CASE_CMAKELISTS_SUFFIX_CODE@
diff --git a/Tests/RunCMake/ctest_update/RunCMakeTest.cmake b/Tests/RunCMake/ctest_update/RunCMakeTest.cmake
new file mode 100644
index 0000000..0e1748f
--- /dev/null
+++ b/Tests/RunCMake/ctest_update/RunCMakeTest.cmake
@@ -0,0 +1,17 @@
+include(RunCTest)
+set(CASE_CTEST_UPDATE_ARGS "")
+function(run_ctest_update CASE_NAME)
+  set(CASE_CTEST_UPDATE_ARGS "${ARGN}")
+  run_ctest(${CASE_NAME})
+endfunction()
+
+run_ctest_update(TestQuiet QUIET)
+
+function(run_TestChangeId)
+  set(CASE_TEST_PREFIX_CODE [[
+    set(CTEST_CHANGE_ID "<>1")
+  ]])
+
+  run_ctest(TestChangeId)
+endfunction()
+run_TestChangeId()
diff --git a/Tests/RunCMake/ctest_update/UpdateChangeId-check.cmake b/Tests/RunCMake/ctest_update/UpdateChangeId-check.cmake
new file mode 100644
index 0000000..9269fbc
--- /dev/null
+++ b/Tests/RunCMake/ctest_update/UpdateChangeId-check.cmake
@@ -0,0 +1,12 @@
+file(GLOB update_xml_file "${RunCMake_TEST_BINARY_DIR}/Testing/*/Update.xml")
+if(update_xml_file)
+  file(READ "${update_xml_file}" update_xml LIMIT 4096)
+  if(NOT update_xml MATCHES [[ChangeId="&lt;&gt;1"]])
+    string(REPLACE "\n" "\n  " update_xml "  ${update_xml}")
+    set(RunCMake_TEST_FAILED
+      "Update.xml does not have expected ChangeId:\n${update_xml}"
+      )
+  endif()
+else()
+  set(RunCMake_TEST_FAILED "Update.xml not found")
+endif()
diff --git a/Tests/RunCMake/ctest_update/test.cmake.in b/Tests/RunCMake/ctest_update/test.cmake.in
new file mode 100644
index 0000000..abbef74
--- /dev/null
+++ b/Tests/RunCMake/ctest_update/test.cmake.in
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.1)
+@CASE_TEST_PREFIX_CODE@
+
+set(CTEST_SITE                          "test-site")
+set(CTEST_BUILD_NAME                    "test-build-name")
+set(CTEST_SOURCE_DIRECTORY              "@RunCMake_BINARY_DIR@/@CASE_NAME@")
+set(CTEST_BINARY_DIRECTORY              "@RunCMake_BINARY_DIR@/@CASE_NAME@-build")
+set(CTEST_CMAKE_GENERATOR               "@RunCMake_GENERATOR@")
+set(CTEST_CMAKE_GENERATOR_PLATFORM      "@RunCMake_GENERATOR_PLATFORM@")
+set(CTEST_CMAKE_GENERATOR_TOOLSET       "@RunCMake_GENERATOR_TOOLSET@")
+set(CTEST_BUILD_CONFIGURATION           "$ENV{CMAKE_CONFIG_TYPE}")
+set(CTEST_UPDATE_COMMAND                "@GIT_EXECUTABLE@")
+
+set(ctest_test_args "@CASE_CTEST_UPDATE_ARGS@")
+ctest_start(Experimental)
+ctest_update(${ctest_update_args})