From 7e1ba9d0757885626b1ed9a26a0b014d6755429b Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Sun, 18 Jan 2009 13:03:32 -0500
Subject: BUG: add output on failure to ctest #8255

---
 Source/cmCTest.cxx | 26 ++++++++++++++++++++++++++
 Source/cmCTest.h   |  5 +++++
 Source/ctest.cxx   |  3 +++
 3 files changed, 34 insertions(+)

diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index 4116d35..1853996 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -258,6 +258,11 @@ cmCTest::cmCTest()
   this->OutputLogFileLastTag   = -1;
   this->SuppressUpdatingCTestConfiguration = false;
   this->DartVersion            = 1;
+  this->OutputTestOutputOnTestFailure = false;
+  if(cmSystemTools::GetEnv("CTEST_OUTPUT_ON_FAILURE"))
+    {
+    this->OutputTestOutputOnTestFailure = true;
+    }
   this->InitStreams();
 
   this->Parts[PartStart].SetName("Start");
@@ -1233,9 +1238,17 @@ int cmCTest::RunTest(std::vector<const char*> argv,
   if(result == cmsysProcess_State_Exited)
     {
     *retVal = cmsysProcess_GetExitValue(cp);
+    if(*retVal != 0 && this->OutputTestOutputOnTestFailure)
+      {
+        OutputTestErrors(tempOutput);
+      }
     }
   else if(result == cmsysProcess_State_Exception)
     {
+    if(this->OutputTestOutputOnTestFailure)
+      {
+        OutputTestErrors(tempOutput);
+      }
     *retVal = cmsysProcess_GetExitException(cp);
     std::string outerr = "\n*** Exception executing: ";
     outerr += cmsysProcess_GetExceptionString(cp);
@@ -1767,6 +1780,10 @@ void cmCTest::HandleCommandLineArguments(size_t &i,
     this->ExtraVerbose = true;
     this->Verbose = true;
     }
+  if(this->CheckArgument(arg, "--output-on-failure"))
+    {
+    this->OutputTestOutputOnTestFailure = true;
+    }
   
   if(this->CheckArgument(arg, "-N", "--show-only"))
     {
@@ -2746,3 +2763,12 @@ double cmCTest::GetRemainingTimeAllowed()
 
   return ch->GetRemainingTimeAllowed();
 }
+
+//----------------------------------------------------------------------
+void cmCTest::OutputTestErrors(std::vector<char> const &process_output)
+{
+  std::string test_outputs("\n*** Test Failed:\n");
+  test_outputs.append(&*process_output.begin(), process_output.size());
+  cmCTestLog(this, HANDLER_OUTPUT, test_outputs << std::endl << std::flush);
+}
+
diff --git a/Source/cmCTest.h b/Source/cmCTest.h
index d822fec..b949378 100644
--- a/Source/cmCTest.h
+++ b/Source/cmCTest.h
@@ -467,6 +467,9 @@ private:
   bool CheckArgument(const std::string& arg, const char* varg1,
     const char* varg2 = 0);
 
+  //! Output errors from a test
+  void OutputTestErrors(std::vector<char> const &process_output);
+
   bool                      SuppressUpdatingCTestConfiguration;
 
   bool Debug;
@@ -482,6 +485,8 @@ private:
 
   cmGeneratedFileStream* OutputLogFile;
   int OutputLogFileLastTag;
+
+  bool OutputTestOutputOnTestFailure;
 };
 
 class cmCTestLogWrite
diff --git a/Source/ctest.cxx b/Source/ctest.cxx
index 9401574..7f4987e 100644
--- a/Source/ctest.cxx
+++ b/Source/ctest.cxx
@@ -65,6 +65,9 @@ static const char * cmDocumentationOptions[][3] =
   {"--debug", "Displaying more verbose internals of CTest.",
     "This feature will result in large number of output that is mostly "
     "useful for debugging dashboard problems."},
+  {"--output-on-failure", "Output anything outputted by the test program "
+   "if the test should fail.  This option can also be enabled by setting "
+   "the environment variable CTEST_OUTPUT_ON_FAILURE"},
   {"-Q,--quiet", "Make ctest quiet.",
     "This option will suppress all the output. The output log file will "
     "still be generated if the --output-log is specified. Options such "
-- 
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