194   std::string ViewerPath;  in DisplayGraph()  local
199   if (S.TryFindProgram("open", ViewerPath)) {  in DisplayGraph()
201     args.push_back(ViewerPath);  in DisplayGraph()
206     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
210   if (S.TryFindProgram("xdg-open", ViewerPath)) {  in DisplayGraph()
212     args.push_back(ViewerPath);  in DisplayGraph()
215     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
220   if (S.TryFindProgram("Graphviz", ViewerPath)) {  in DisplayGraph()
222     args.push_back(ViewerPath);  in DisplayGraph()
226     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
230   if (S.TryFindProgram("xdot|xdot.py", ViewerPath)) {  in DisplayGraph()
232     args.push_back(ViewerPath);  in DisplayGraph()
239     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
251   if (!Viewer && S.TryFindProgram("open", ViewerPath))  in DisplayGraph()
254   if (!Viewer && S.TryFindProgram("gv", ViewerPath))  in DisplayGraph()
256   if (!Viewer && S.TryFindProgram("xdg-open", ViewerPath))  in DisplayGraph()
259   if (!Viewer && S.TryFindProgram("cmd", ViewerPath)) {  in DisplayGraph()
294     args.push_back(ViewerPath);  in DisplayGraph()
320     return ExecGraphViewer(ViewerPath, args, OutputFilename, wait, ErrMsg);  in DisplayGraph()
324   if (S.TryFindProgram("dotty", ViewerPath)) {  in DisplayGraph()
326     args.push_back(ViewerPath);  in DisplayGraph()
334     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()