193   std::string ViewerPath;  in DisplayGraph()  local
198   if (S.TryFindProgram("open", ViewerPath)) {  in DisplayGraph()
200     args.push_back(ViewerPath);  in DisplayGraph()
205     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
209   if (S.TryFindProgram("xdg-open", ViewerPath)) {  in DisplayGraph()
211     args.push_back(ViewerPath);  in DisplayGraph()
214     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
219   if (S.TryFindProgram("Graphviz", ViewerPath)) {  in DisplayGraph()
221     args.push_back(ViewerPath);  in DisplayGraph()
225     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
229   if (S.TryFindProgram("xdot|xdot.py", ViewerPath)) {  in DisplayGraph()
231     args.push_back(ViewerPath);  in DisplayGraph()
238     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
250   if (!Viewer && S.TryFindProgram("open", ViewerPath))  in DisplayGraph()
253   if (!Viewer && S.TryFindProgram("gv", ViewerPath))  in DisplayGraph()
255   if (!Viewer && S.TryFindProgram("xdg-open", ViewerPath))  in DisplayGraph()
258   if (!Viewer && S.TryFindProgram("cmd", ViewerPath)) {  in DisplayGraph()
293     args.push_back(ViewerPath);  in DisplayGraph()
319     return ExecGraphViewer(ViewerPath, args, OutputFilename, wait, ErrMsg);  in DisplayGraph()
323   if (S.TryFindProgram("dotty", ViewerPath)) {  in DisplayGraph()
325     args.push_back(ViewerPath);  in DisplayGraph()
333     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()