[llvm-cov] Emit a summary in the report directory's index

llvm-cov writes out an index file in '-output-dir' mode, albeit not a
very informative one. Try to fix that by using the CoverageReport API to
include some basic summary information in the index file.

llvm-svn: 281011

1 files changed, 6 insertions, 3 deletions

diff --git a/llvm/tools/llvm-cov/SourceCoverageViewText.cpp b/llvm/tools/llvm-cov/SourceCoverageViewText.cpp
index 3d2c067d0a4..b0676cad7b9 100644
--- a/llvm/tools/llvm-cov/SourceCoverageViewText.cpp
+++ b/llvm/tools/llvm-cov/SourceCoverageViewText.cpp
@@ -11,6 +11,7 @@
 ///
 //===----------------------------------------------------------------------===//
 
+#include "CoverageReport.h"
 #include "SourceCoverageViewText.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallString.h"
@@ -27,15 +28,17 @@ void CoveragePrinterText::closeViewFile(OwnedStream OS) {
   OS->operator<<('\n');
 }
 
-Error CoveragePrinterText::createIndexFile(ArrayRef<StringRef> SourceFiles) {
+Error CoveragePrinterText::createIndexFile(
+    ArrayRef<StringRef> SourceFiles,
+    const coverage::CoverageMapping &Coverage) {
   auto OSOrErr = createOutputStream("index", "txt", /*InToplevel=*/true);
   if (Error E = OSOrErr.takeError())
     return E;
   auto OS = std::move(OSOrErr.get());
   raw_ostream &OSRef = *OS.get();
 
-  for (StringRef SF : SourceFiles)
-    OSRef << getOutputPath(SF, "txt", /*InToplevel=*/false) << '\n';
+  CoverageReport Report(Opts, Coverage);
+  Report.renderFileReports(OSRef);
 
   return Error::success();
 }