graph: Report errors if a target does not exist.

1 files changed, 11 insertions, 3 deletions

diff --git a/src/ninja.cc b/src/ninja.cc
index 4166a49..6359aaf 100644
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -98,12 +98,20 @@ struct RealFileReader : public ManifestParser::FileReader {
 };
 
 int CmdGraph(State* state, int argc, char* argv[]) {
+  int status = 0;
   GraphViz graph;
   graph.Start();
-  for (int i = 0; i < argc; ++i)
-    graph.AddTarget(state->GetNode(argv[i]));
+  for (int i = 0; i < argc; ++i) {
+    Node* node = state->LookupNode(argv[i]);
+    if (node)
+      graph.AddTarget(node);
+    else {
+      Error("unknown target '%s'", argv[i]);
+      status = 1;
+    }
+  }
   graph.Finish();
-  return 0;
+  return status;
 }
 
 int CmdQuery(State* state, int argc, char* argv[]) {