153   std::string ViewerPath;  in DisplayGraph()  local
158   if (S.TryFindProgram("open", ViewerPath)) {  in DisplayGraph()
160     args.push_back(ViewerPath);  in DisplayGraph()
165     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
169   if (S.TryFindProgram("xdg-open", ViewerPath)) {  in DisplayGraph()
171     args.push_back(ViewerPath);  in DisplayGraph()
174     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
179   if (S.TryFindProgram("Graphviz", ViewerPath)) {  in DisplayGraph()
181     args.push_back(ViewerPath);  in DisplayGraph()
185     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
189   if (S.TryFindProgram("xdot|xdot.py", ViewerPath)) {  in DisplayGraph()
191     args.push_back(ViewerPath);  in DisplayGraph()
198     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
210   if (!Viewer && S.TryFindProgram("open", ViewerPath))  in DisplayGraph()
213   if (!Viewer && S.TryFindProgram("gv", ViewerPath))  in DisplayGraph()
215   if (!Viewer && S.TryFindProgram("xdg-open", ViewerPath))  in DisplayGraph()
218   if (!Viewer && S.TryFindProgram("cmd", ViewerPath)) {  in DisplayGraph()
253     args.push_back(ViewerPath);  in DisplayGraph()
279     return ExecGraphViewer(ViewerPath, args, OutputFilename, wait, ErrMsg);  in DisplayGraph()
283   if (S.TryFindProgram("dotty", ViewerPath)) {  in DisplayGraph()
285     args.push_back(ViewerPath);  in DisplayGraph()
293     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()