terraform: add provisioner nodes to the apply graph

terraform/graph_builder_apply.go

@@ -59,6 +59,10 @@ func (b *ApplyGraphBuilder) Steps() []GraphTransformer {
 		&ProviderTransformer{},
 		&ParentProviderTransformer{},
 
+		// Provisioner-related transformations
+		&MissingProvisionerTransformer{Provisioners: b.Provisioners},
+		&ProvisionerTransformer{},
+
 		// Attach the configurations
 		&AttachConfigTransformer{Module: b.Module},
 

terraform/graph_builder_apply_test.go

@@ -47,8 +47,10 @@ func TestApplyGraphBuilder(t *testing.T) {
 	}
 
 	b := &ApplyGraphBuilder{
-		Diff:      diff,
-		Providers: []string{"aws"},
+		Module:       testModule(t, "graph-builder-apply-basic"),
+		Diff:         diff,
+		Providers:    []string{"aws"},
+		Provisioners: []string{"exec"},
 	}
 
 	g, err := b.Build(RootModulePath)
@@ -72,9 +74,11 @@ aws_instance.create
   provider.aws
 module.child.aws_instance.create
   module.child.provider.aws
+  provisioner.exec
 module.child.provider.aws
   provider.aws
 provider.aws
+provisioner.exec
 root
   aws_instance.create
   module.child.aws_instance.create

terraform/node_resource.go

@@ -39,6 +39,23 @@ func (n *NodeApplyableResource) ProvidedBy() []string {
 	return []string{resourceProvider(n.Addr.Type, "")}
 }
 
+// GraphNodeProvisionerConsumer
+func (n *NodeApplyableResource) ProvisionedBy() []string {
+	// If we have no configuration, then we have no provisioners
+	if n.Config == nil {
+		return nil
+	}
+
+	// Build the list of provisioners we need based on the configuration.
+	// It is okay to have duplicates here.
+	result := make([]string, len(n.Config.Provisioners))
+	for i, p := range n.Config.Provisioners {
+		result[i] = p.Type
+	}
+
+	return result
+}
+
 // GraphNodeEvalable
 func (n *NodeApplyableResource) EvalTree() EvalNode {
 	// stateId is the ID to put into the state

terraform/test-fixtures/graph-builder-apply-basic/child/main.tf

@@ -0,0 +1,3 @@
+resource "aws_instance" "create" {
+    provisioner "exec" {}
+}

terraform/test-fixtures/graph-builder-apply-basic/main.tf

@@ -0,0 +1,3 @@
+module "child" {
+    source = "./child"
+}