Do not output preprocessed source if diagnostics are enabled

Author: cmaglie

CommandLine.cpp

@@ -37,6 +37,7 @@ using namespace std;
 bool debugOutput;
 bool outputDiagnostics;
 bool outputOnlyNeededPrototypes;
+bool outputPreprocessedSketch = true;
 
 static cl::OptionCategory arduinoToolCategory("Arduino options");
 // TODO: add complete help
@@ -74,6 +75,8 @@ CommonOptionsParser doCommandLineParsing(int argc, const char **argv) {
     debugOutput = debugOutputOpt.getValue();
     outputOnlyNeededPrototypes = outputOnlyNeededPrototypesOpt.getValue();
     outputDiagnostics = outputDiagnosticsOpt.getValue();
-
+    if (outputDiagnostics) {
+        outputPreprocessedSketch = false;
+    }
     return optParser;
 }

CommandLine.hpp

@@ -39,5 +39,6 @@ using namespace llvm;
 extern bool debugOutput;
 extern bool outputOnlyNeededPrototypes;
 extern bool outputDiagnostics;
+extern bool outputPreprocessedSketch;
 
 CommonOptionsParser doCommandLineParsing(int argc, const char **argv);

main.cpp

@@ -241,6 +241,10 @@ class INOPreprocessAction : public ASTFrontendAction {
             outs() << out.str();
         }
 
+        if (!outputPreprocessedSketch) {
+            return;
+        }
+
         const FileID mainFileID = rewriter.getSourceMgr().getMainFileID();
         const RewriteBuffer *buf = rewriter.getRewriteBufferFor(mainFileID);
         if (buf == nullptr) {