core: OrphanResourceTransformer -> OrphanResourceInstanceTransformer

This transformer creates resource _instance_ nodes rather than resource
nodes, so this name is a clearer descriptor for what it does.

terraform/graph_builder_plan.go

@@ -90,7 +90,7 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 		&OutputTransformer{Config: b.Config},
 
 		// Add orphan resources
-		&OrphanResourceTransformer{
+		&OrphanResourceInstanceTransformer{
 			Concrete: b.ConcreteResourceOrphan,
 			State:    b.State,
 			Config:   b.Config,

terraform/graph_builder_refresh.go

@@ -123,7 +123,7 @@ func (b *RefreshGraphBuilder) Steps() []GraphTransformer {
 		// Add any fully-orphaned resources from config (ones that have been
 		// removed completely, not ones that are just orphaned due to a scaled-in
 		// count.
-		&OrphanResourceTransformer{
+		&OrphanResourceInstanceTransformer{
 			Concrete: concreteManagedResourceInstance,
 			State:    b.State,
 			Config:   b.Config,

terraform/transform_orphan_resource.go

@@ -6,13 +6,15 @@ import (
 	"github.com/hashicorp/terraform/states"
 )
 
-// OrphanResourceTransformer is a GraphTransformer that adds resource
-// orphans to the graph. A resource orphan is a resource that is
-// represented in the state but not in the configuration.
-//
-// This only adds orphans that have no representation at all in the
+// OrphanResourceInstanceTransformer is a GraphTransformer that adds orphaned
+// resource instances to the graph. An "orphan" is an instance that is present
+// in the state but belongs to a resource that is no longer present in the
 // configuration.
-type OrphanResourceTransformer struct {
+//
+// This is not the transformer that deals with "count orphans" (instances that
+// are no longer covered by a resource's "count" or "for_each" setting); that's
+// handled instead by OrphanResourceCountTransformer.
+type OrphanResourceInstanceTransformer struct {
 	Concrete ConcreteResourceInstanceNodeFunc
 
 	// State is the global state. We require the global state to
@@ -24,7 +26,7 @@ type OrphanResourceTransformer struct {
 	Config *configs.Config
 }
 
-func (t *OrphanResourceTransformer) Transform(g *Graph) error {
+func (t *OrphanResourceInstanceTransformer) Transform(g *Graph) error {
 	if t.State == nil {
 		// If the entire state is nil, there can't be any orphans
 		return nil
@@ -32,7 +34,7 @@ func (t *OrphanResourceTransformer) Transform(g *Graph) error {
 	if t.Config == nil {
 		// Should never happen: we can't be doing any Terraform operations
 		// without at least an empty configuration.
-		panic("OrpahResourceTransformer used without setting Config")
+		panic("OrphanResourceInstanceTransformer used without setting Config")
 	}
 
 	// Go through the modules and for each module transform in order
@@ -46,7 +48,7 @@ func (t *OrphanResourceTransformer) Transform(g *Graph) error {
 	return nil
 }
 
-func (t *OrphanResourceTransformer) transform(g *Graph, ms *states.Module) error {
+func (t *OrphanResourceInstanceTransformer) transform(g *Graph, ms *states.Module) error {
 	if ms == nil {
 		return nil
 	}

terraform/transform_orphan_resource_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/hashicorp/terraform/states"
 )
 
-func TestOrphanResourceTransformer(t *testing.T) {
+func TestOrphanResourceInstanceTransformer(t *testing.T) {
 	mod := testModule(t, "transform-orphan-basic")
 
 	state := states.BuildState(func(s *states.SyncState) {
@@ -59,7 +59,7 @@ func TestOrphanResourceTransformer(t *testing.T) {
 	}
 
 	{
-		tf := &OrphanResourceTransformer{
+		tf := &OrphanResourceInstanceTransformer{
 			Concrete: testOrphanResourceConcreteFunc,
 			State:    state,
 			Config:   mod,
@@ -76,7 +76,7 @@ func TestOrphanResourceTransformer(t *testing.T) {
 	}
 }
 
-func TestOrphanResourceTransformer_countGood(t *testing.T) {
+func TestOrphanResourceInstanceTransformer_countGood(t *testing.T) {
 	mod := testModule(t, "transform-orphan-count")
 
 	state := states.BuildState(func(s *states.SyncState) {
@@ -123,7 +123,7 @@ func TestOrphanResourceTransformer_countGood(t *testing.T) {
 	}
 
 	{
-		tf := &OrphanResourceTransformer{
+		tf := &OrphanResourceInstanceTransformer{
 			Concrete: testOrphanResourceConcreteFunc,
 			State:    state,
 			Config:   mod,
@@ -140,7 +140,7 @@ func TestOrphanResourceTransformer_countGood(t *testing.T) {
 	}
 }
 
-func TestOrphanResourceTransformer_countBad(t *testing.T) {
+func TestOrphanResourceInstanceTransformer_countBad(t *testing.T) {
 	mod := testModule(t, "transform-orphan-count-empty")
 	state := states.BuildState(func(s *states.SyncState) {
 		s.SetResourceInstanceCurrent(
@@ -186,7 +186,7 @@ func TestOrphanResourceTransformer_countBad(t *testing.T) {
 	}
 
 	{
-		tf := &OrphanResourceTransformer{
+		tf := &OrphanResourceInstanceTransformer{
 			Concrete: testOrphanResourceConcreteFunc,
 			State:    state,
 			Config:   mod,
@@ -203,7 +203,7 @@ func TestOrphanResourceTransformer_countBad(t *testing.T) {
 	}
 }
 
-func TestOrphanResourceTransformer_modules(t *testing.T) {
+func TestOrphanResourceInstanceTransformer_modules(t *testing.T) {
 	mod := testModule(t, "transform-orphan-modules")
 	state := states.BuildState(func(s *states.SyncState) {
 		s.SetResourceInstanceCurrent(
@@ -249,7 +249,7 @@ func TestOrphanResourceTransformer_modules(t *testing.T) {
 	}
 
 	{
-		tf := &OrphanResourceTransformer{
+		tf := &OrphanResourceInstanceTransformer{
 			Concrete: testOrphanResourceConcreteFunc,
 			State:    state,
 			Config:   mod,