Remove the dot graphs from the debug log,

and record the walk visits in the debug information.

terraform/debug.go

@@ -224,40 +224,6 @@ func (d *debugInfo) flush() {
 	}
 }
 
-// WriteGraph takes a DebugGraph and writes both the DebugGraph as a dot file
-// in the debug archive, and extracts any logs that the DebugGraph collected
-// and writes them to a log file in the archive.
-func (d *debugInfo) WriteGraph(name string, g *Graph) error {
-	if d == nil || g == nil {
-		return nil
-	}
-	d.Lock()
-	defer d.Unlock()
-
-	// If we crash, the file won't be correctly closed out, but we can rebuild
-	// the archive if we have to as long as every file has been flushed and
-	// sync'ed.
-	defer d.flush()
-
-	dotPath := fmt.Sprintf("%s/graphs/%d-%s-%s.dot", d.name, d.step, d.phase, name)
-	d.step++
-
-	dotBytes := g.Dot(nil)
-	hdr := &tar.Header{
-		Name: dotPath,
-		Mode: 0644,
-		Size: int64(len(dotBytes)),
-	}
-
-	err := d.tar.WriteHeader(hdr)
-	if err != nil {
-		return err
-	}
-
-	_, err = d.tar.Write(dotBytes)
-	return err
-}
-
 // WriteFile writes data as a single file to the debug arhive.
 func (d *debugInfo) WriteFile(name string, data []byte) error {
 	if d == nil {

terraform/debug_test.go

@@ -16,7 +16,6 @@ func TestDebugInfo_nil(t *testing.T) {
 	var d *debugInfo
 
 	d.SetPhase("none")
-	d.WriteGraph("", nil)
 	d.WriteFile("none", nil)
 	d.Close()
 }
@@ -120,9 +119,7 @@ func TestDebug_plan(t *testing.T) {
 	}
 	tr := tar.NewReader(gz)
 
-	files := 0
-	graphs := 0
-	json := 0
+	graphLogs := 0
 	for {
 		hdr, err := tr.Next()
 		if err == io.EOF {
@@ -134,28 +131,13 @@ func TestDebug_plan(t *testing.T) {
 
 		// record any file that contains data
 		if hdr.Size > 0 {
-			files++
-
-			// and any dot graph with data
-			if strings.HasSuffix(hdr.Name, ".dot") {
-				graphs++
-			}
-
 			if strings.HasSuffix(hdr.Name, "graph.json") {
-				json++
+				graphLogs++
 			}
 		}
 	}
 
-	if files == 0 {
-		t.Fatal("no files with data found")
-	}
-
-	if graphs == 0 {
-		t.Fatal("no no-empty graphs found")
-	}
-
-	if json == 0 {
+	if graphLogs == 0 {
 		t.Fatal("no json graphs")
 	}
 }

terraform/graph.go

@@ -246,6 +246,7 @@ func (g *Graph) walk(walker GraphWalker) error {
 	var walkFn dag.WalkFunc
 	walkFn = func(v dag.Vertex) (rerr error) {
 		log.Printf("[DEBUG] vertex '%s.%s': walking", path, dag.VertexName(v))
+		g.DebugVisitInfo(v, g.debugName)
 
 		// If we have a panic wrap GraphWalker and a panic occurs, recover
 		// and call that. We ensure the return value is an error, however,

terraform/graph_builder.go

@@ -58,19 +58,10 @@ func (b *BasicGraphBuilder) Build(path []string) (*Graph, error) {
 		}
 		debugOp.End(errMsg)
 
-		// always log the graph state to see what transformations may have happened
-		debugName := "build-" + stepName
-		if b.Name != "" {
-			debugName = b.Name + "-" + debugName
-		}
-
 		log.Printf(
 			"[TRACE] Graph after step %T:\n\n%s",
 			step, g.StringWithNodeTypes())
 
-		// TODO: replace entirely with the json logs
-		dbug.WriteGraph(debugName, g)
-
 		if err != nil {
 			return g, err
 		}