ENH: Teach ctest_coverage to filter with LABELS

This teaches ctest_coverage() to report only coverage of files labeled
with at least one label given by a new LABELS option.

1 files changed, 36 insertions, 3 deletions

diff --git a/Source/CTest/cmCTestCoverageCommand.cxx b/Source/CTest/cmCTestCoverageCommand.cxx
index bf64afc..067a4e9 100644
--- a/Source/CTest/cmCTestCoverageCommand.cxx
+++ b/Source/CTest/cmCTestCoverageCommand.cxx
@@ -17,22 +17,55 @@
 #include "cmCTestCoverageCommand.h"
 
 #include "cmCTest.h"
-#include "cmCTestGenericHandler.h"
+#include "cmCTestCoverageHandler.h"
 
 cmCTestGenericHandler* cmCTestCoverageCommand::InitializeHandler()
 {
   this->CTest->SetCTestConfigurationFromCMakeVariable(this->Makefile,
     "CoverageCommand", "CTEST_COVERAGE_COMMAND");
 
-  cmCTestGenericHandler* handler
-    = this->CTest->GetInitializedHandler("coverage");
+  cmCTestCoverageHandler* handler = static_cast<cmCTestCoverageHandler*>(
+    this->CTest->GetInitializedHandler("coverage"));
   if ( !handler )
     {
     this->SetError("internal CTest error. Cannot instantiate test handler");
     return 0;
     }
+
+  // If a LABELS option was given, select only files with the labels.
+  if(this->LabelsMentioned)
+    {
+    handler->SetLabelFilter(this->Labels);
+    }
+
   return handler;
 }
 
+//----------------------------------------------------------------------------
+bool cmCTestCoverageCommand::CheckArgumentKeyword(std::string const& arg)
+{
+  // Look for arguments specific to this command.
+  if(arg == "LABELS")
+    {
+    this->ArgumentDoing = ArgumentDoingLabels;
+    this->LabelsMentioned = true;
+    return true;
+    }
 
+  // Look for other arguments.
+  return this->Superclass::CheckArgumentKeyword(arg);
+}
+
+//----------------------------------------------------------------------------
+bool cmCTestCoverageCommand::CheckArgumentValue(std::string const& arg)
+{
+  // Handle states specific to this command.
+  if(this->ArgumentDoing == ArgumentDoingLabels)
+    {
+    this->Labels.insert(arg);
+    return true;
+    }
 
+  // Look for other arguments.
+  return this->Superclass::CheckArgumentValue(arg);
+}