[clang-format] Add text proto filename detection

Summary: Adds text proto filename detection.

Reviewers: klimek

Reviewed By: klimek

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D40120

llvm-svn: 318525

clang/lib/Format/Format.cpp

@@ -2084,6 +2084,11 @@ static FormatStyle::LanguageKind getLanguageByFileName(StringRef FileName) {
   if (FileName.endswith_lower(".proto") ||
       FileName.endswith_lower(".protodevel"))
     return FormatStyle::LK_Proto;
+  if (FileName.endswith_lower(".textpb") ||
+      FileName.endswith_lower(".pb.txt") ||
+      FileName.endswith_lower(".textproto") ||
+      FileName.endswith_lower(".asciipb"))
+    return FormatStyle::LK_TextProto;
   if (FileName.endswith_lower(".td"))
     return FormatStyle::LK_TableGen;
   return FormatStyle::LK_Cpp;