9 files changed, 29 insertions, 11 deletions
diff --git a/Source/CTest/cmCTestMultiProcessHandler.cxx b/Source/CTest/cmCTestMultiProcessHandler.cxx
index 8867323..320647a 100644
--- a/Source/CTest/cmCTestMultiProcessHandler.cxx
+++ b/Source/CTest/cmCTestMultiProcessHandler.cxx
@@ -1039,6 +1039,11 @@ void cmCTestMultiProcessHandler::PrintOutputAsJson()
     testRun.SetTestProperties(&p);
     testRun.ComputeArguments();
 
+    // Skip tests not available in this configuration.
+    if (p.Args.size() >= 2 && p.Args[1] == "NOT_AVAILABLE") {
+      continue;
+    }
+
     Json::Value testInfo = DumpCTestInfo(testRun, p, backtraceGraph);
     tests.append(testInfo);
   }
diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index ded2525..4959288 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -1944,6 +1944,9 @@ bool cmCTest::HandleCommandLineArguments(size_t& i,
       this->Quiet = true;
       this->OutputAsJson = true;
       this->OutputAsJsonVersion = 1;
+    } else if (format != "human") {
+      errormsg = "'--show-only=' given unknown value '" + format + "'";
+      return false;
     }
   }
 
diff --git a/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake b/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
index cae14b1..d524f41 100644
--- a/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
@@ -174,12 +174,15 @@ function(run_TestStdin)
 endfunction()
 run_TestStdin()
 
-function(ShowAsJson_check_python v)
+function(show_only_json_check_python v)
+  if(RunCMake_TEST_FAILED OR NOT PYTHON_EXECUTABLE)
+    return()
+  endif()
   set(json_file "${RunCMake_TEST_BINARY_DIR}/ctest.json")
   file(WRITE "${json_file}" "${actual_stdout}")
   set(actual_stdout "" PARENT_SCOPE)
   execute_process(
-    COMMAND ${PYTHON_EXECUTABLE} "${RunCMake_SOURCE_DIR}/ShowAsJson${v}-check.py" "${json_file}"
+    COMMAND ${PYTHON_EXECUTABLE} "${RunCMake_SOURCE_DIR}/show-only_json-v${v}_check.py" "${json_file}"
     RESULT_VARIABLE result
     OUTPUT_VARIABLE output
     ERROR_VARIABLE output
@@ -190,15 +193,18 @@ function(ShowAsJson_check_python v)
   endif()
 endfunction()
 
-function(run_ShowAsJson)
-  set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/ShowAsJson)
+function(run_ShowOnly)
+  set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/ShowOnly)
   set(RunCMake_TEST_NO_CLEAN 1)
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")
   file(MAKE_DIRECTORY "${RunCMake_TEST_BINARY_DIR}")
   file(WRITE "${RunCMake_TEST_BINARY_DIR}/CTestTestfile.cmake" "
-    add_test(ShowAsJson \"${CMAKE_COMMAND}\" -E echo)
-    set_tests_properties(ShowAsJson PROPERTIES WILL_FAIL true _BACKTRACE_TRIPLES \"file1;1;add_test;file0;;\")
+    add_test(ShowOnly \"${CMAKE_COMMAND}\" -E echo)
+    set_tests_properties(ShowOnly PROPERTIES WILL_FAIL true _BACKTRACE_TRIPLES \"file1;1;add_test;file0;;\")
+    add_test(ShowOnlyNotAvailable NOT_AVAILABLE)
 ")
-  run_cmake_command(ShowAsJsonVersionOne ${CMAKE_CTEST_COMMAND} --show-only=json-v1)
+  run_cmake_command(show-only_human ${CMAKE_CTEST_COMMAND} --show-only=human)
+  run_cmake_command(show-only_bad ${CMAKE_CTEST_COMMAND} --show-only=bad)
+  run_cmake_command(show-only_json-v1 ${CMAKE_CTEST_COMMAND} --show-only=json-v1)
 endfunction()
-run_ShowAsJson()
+run_ShowOnly()
diff --git a/Tests/RunCMake/CTestCommandLine/show-only_bad-result.txt b/Tests/RunCMake/CTestCommandLine/show-only_bad-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/CTestCommandLine/show-only_bad-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/CTestCommandLine/show-only_bad-stderr.txt b/Tests/RunCMake/CTestCommandLine/show-only_bad-stderr.txt
new file mode 100644
index 0000000..cc55ab3
--- /dev/null
+++ b/Tests/RunCMake/CTestCommandLine/show-only_bad-stderr.txt
@@ -0,0 +1 @@
+^CMake Error: '--show-only=' given unknown value 'bad'$
diff --git a/Tests/RunCMake/CTestCommandLine/show-only_human-stdout.txt b/Tests/RunCMake/CTestCommandLine/show-only_human-stdout.txt
new file mode 100644
index 0000000..1332149
--- /dev/null
+++ b/Tests/RunCMake/CTestCommandLine/show-only_human-stdout.txt
@@ -0,0 +1 @@
+Test #1: ShowOnly
diff --git a/Tests/RunCMake/CTestCommandLine/show-only_json-v1-check.cmake b/Tests/RunCMake/CTestCommandLine/show-only_json-v1-check.cmake
new file mode 100644
index 0000000..f9234f8
--- /dev/null
+++ b/Tests/RunCMake/CTestCommandLine/show-only_json-v1-check.cmake
@@ -0,0 +1 @@
+show_only_json_check_python(1)
diff --git a/Tests/RunCMake/CTestCommandLine/ShowAsJson1-check.py b/Tests/RunCMake/CTestCommandLine/show-only_json-v1_check.py
index d794e7d..4dff90c 100644
--- a/Tests/RunCMake/CTestCommandLine/ShowAsJson1-check.py
+++ b/Tests/RunCMake/CTestCommandLine/show-only_json-v1_check.py
@@ -1,4 +1,4 @@
-from ShowAsJson_check import *
+from show_only_json_check import *
 
 def check_kind(k):
     assert is_string(k)
@@ -77,7 +77,7 @@ def check_workingdir_property(p):
     assert is_string(p["name"])
     assert is_string(p["value"])
     assert p["name"] == "WORKING_DIRECTORY"
-    assert p["value"].endswith("Tests/RunCMake/CTestCommandLine/ShowAsJson")
+    assert p["value"].endswith("Tests/RunCMake/CTestCommandLine/ShowOnly")
 
 def check_properties(p):
     assert is_list(p)
@@ -95,7 +95,7 @@ def check_tests(t):
     assert test["backtrace"] == 1
     check_command(test["command"])
     assert is_string(test["name"])
-    assert test["name"] == "ShowAsJson"
+    assert test["name"] == "ShowOnly"
     check_properties(test["properties"])
 
 assert is_dict(ctest_json)
diff --git a/Tests/RunCMake/CTestCommandLine/ShowAsJson_check.py b/Tests/RunCMake/CTestCommandLine/show_only_json_check.py
index 493c9e5..493c9e5 100644
--- a/Tests/RunCMake/CTestCommandLine/ShowAsJson_check.py
+++ b/Tests/RunCMake/CTestCommandLine/show_only_json_check.py