139   std::string ViewerPath;  in DisplayGraph()  local
144   if (S.TryFindProgram("open", ViewerPath)) {  in DisplayGraph()
146     args.push_back(ViewerPath.c_str());  in DisplayGraph()
152     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
156   if (S.TryFindProgram("xdg-open", ViewerPath)) {  in DisplayGraph()
158     args.push_back(ViewerPath.c_str());  in DisplayGraph()
162     if (!ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg))  in DisplayGraph()
167   if (S.TryFindProgram("Graphviz", ViewerPath)) {  in DisplayGraph()
169     args.push_back(ViewerPath.c_str());  in DisplayGraph()
174     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
178   if (S.TryFindProgram("xdot|xdot.py", ViewerPath)) {  in DisplayGraph()
180     args.push_back(ViewerPath.c_str());  in DisplayGraph()
189     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()
201   if (!Viewer && S.TryFindProgram("open", ViewerPath))  in DisplayGraph()
204   if (!Viewer && S.TryFindProgram("gv", ViewerPath))  in DisplayGraph()
206   if (!Viewer && S.TryFindProgram("xdg-open", ViewerPath))  in DisplayGraph()
209   if (!Viewer && S.TryFindProgram("cmd", ViewerPath)) {  in DisplayGraph()
245     args.push_back(ViewerPath.c_str());  in DisplayGraph()
272     return ExecGraphViewer(ViewerPath, args, OutputFilename, wait, ErrMsg);  in DisplayGraph()
276   if (S.TryFindProgram("dotty", ViewerPath)) {  in DisplayGraph()
278     args.push_back(ViewerPath.c_str());  in DisplayGraph()
287     return ExecGraphViewer(ViewerPath, args, Filename, wait, ErrMsg);  in DisplayGraph()