Strip out target file for diagnostics.

This causes an issue for the semantic diagnostic phase.

Remove this flag on the server to simplify the client.

SwiftCompleter.cpp

@@ -440,6 +440,18 @@ SwiftCompleter::SwiftCompleter(LogLevel logLevel)
 SwiftCompleter::~SwiftCompleter() {
 }
 
+// Transform completion flags into diagnostic flags
+auto DiagnosticFlagsFromFlags(std::string filename, std::vector<std::string> flags) {
+ std::vector<std::string> outputFlags;
+ for (auto &f : flags) {
+ if (f == filename) {
+ continue;
+ }
+ outputFlags.push_back(f);
+ }
+ return outputFlags;
+}
+
 const std::string SwiftCompleter::CandidatesForLocationInFile(
  const std::string &filename, int line, int column,
  const std::vector<UnsavedFile> &unsavedFiles,
@@ -465,7 +477,7 @@ SwiftCompleter::DiagnosticsForFile(const std::string &filename,
  CompletionContext ctx;
  ctx.sourceFilename = filename;
  ctx.unsavedFiles = unsavedFiles;
- ctx.flags = flags;
+ ctx.flags = DiagnosticFlagsFromFlags(filename, flags);
  ctx.line = 0;
  ctx.column = 0;