Merge pull request #26495 from hashicorp/jbardin/evaluate-walks

Audit some graph building and GraphNodeExecutable

terraform/context_eval_test.go

@@ -38,7 +38,7 @@ func TestContextEval(t *testing.T) {
 		},
 		{
 			`module.child.result`,
-			cty.UnknownVal(cty.Number),
+			cty.NumberIntVal(6),
 			false,
 		},
 	}

terraform/graph_builder_apply.go

@@ -87,6 +87,12 @@ func (b *ApplyGraphBuilder) Steps() []GraphTransformer {
 			Config:   b.Config,
 		},
 
+		// Add dynamic values
+		&RootVariableTransformer{Config: b.Config},
+		&ModuleVariableTransformer{Config: b.Config},
+		&LocalTransformer{Config: b.Config},
+		&OutputTransformer{Config: b.Config},
+
 		// Creates all the resource instances represented in the diff, along
 		// with dependency edges against the whole-resource nodes added by
 		// ConfigTransformer above.
@@ -96,31 +102,19 @@ func (b *ApplyGraphBuilder) Steps() []GraphTransformer {
 			Changes:  b.Changes,
 		},
 
+		// Attach the state
+		&AttachStateTransformer{State: b.State},
+
 		// Create orphan output nodes
 		&OrphanOutputTransformer{Config: b.Config, State: b.State},
 
 		// Attach the configuration to any resources
 		&AttachResourceConfigTransformer{Config: b.Config},
 
-		// Attach the state
-		&AttachStateTransformer{State: b.State},
-
 		// Provisioner-related transformations
 		&MissingProvisionerTransformer{Provisioners: b.Components.ResourceProvisioners()},
 		&ProvisionerTransformer{},
 
-		// Add root variables
-		&RootVariableTransformer{Config: b.Config},
-
-		// Add the local values
-		&LocalTransformer{Config: b.Config},
-
-		// Add the outputs
-		&OutputTransformer{Config: b.Config},
-
-		// Add module variables
-		&ModuleVariableTransformer{Config: b.Config},
-
 		// add providers
 		TransformProviders(b.Components.ResourceProviders(), concreteProvider, b.Config),
 
@@ -150,7 +144,6 @@ func (b *ApplyGraphBuilder) Steps() []GraphTransformer {
 			State:   b.State,
 			Schemas: b.Schemas,
 		},
-
 		&CBDEdgeTransformer{
 			Config:  b.Config,
 			State:   b.State,

terraform/graph_builder_destroy_plan.go

@@ -92,8 +92,13 @@ func (b *DestroyPlanGraphBuilder) Steps() []GraphTransformer {
 		// created proper destroy ordering.
 		&TargetsTransformer{Targets: b.Targets},
 
+		// Close opened plugin connections
+		&CloseProviderTransformer{},
+
 		// Close the root module
 		&CloseRootModuleTransformer{},
+
+		&TransitiveReductionTransformer{},
 	}
 
 	return steps

terraform/graph_builder_eval.go

@@ -60,28 +60,20 @@ func (b *EvalGraphBuilder) Steps() []GraphTransformer {
 		// Creates all the data resources that aren't in the state. This will also
 		// add any orphans from scaling in as destroy nodes.
 		&ConfigTransformer{
-			Concrete: nil, // just use the abstract type
-			Config:   b.Config,
-			Unique:   true,
+			Config: b.Config,
 		},
 
-		// Attach the state
-		&AttachStateTransformer{State: b.State},
+		// Add dynamic values
+		&RootVariableTransformer{Config: b.Config},
+		&ModuleVariableTransformer{Config: b.Config},
+		&LocalTransformer{Config: b.Config},
+		&OutputTransformer{Config: b.Config},
 
 		// Attach the configuration to any resources
 		&AttachResourceConfigTransformer{Config: b.Config},
 
-		// Add root variables
-		&RootVariableTransformer{Config: b.Config},
-
-		// Add the local values
-		&LocalTransformer{Config: b.Config},
-
-		// Add the outputs
-		&OutputTransformer{Config: b.Config},
-
-		// Add module variables
-		&ModuleVariableTransformer{Config: b.Config},
+		// Attach the state
+		&AttachStateTransformer{State: b.State},
 
 		TransformProviders(b.Components.ResourceProviders(), concreteProvider, b.Config),
 
@@ -92,9 +84,7 @@ func (b *EvalGraphBuilder) Steps() []GraphTransformer {
 		// Create expansion nodes for all of the module calls. This must
 		// come after all other transformers that create nodes representing
 		// objects that can belong to modules.
-		&ModuleExpansionTransformer{
-			Config: b.Config,
-		},
+		&ModuleExpansionTransformer{Config: b.Config},
 
 		// Connect so that the references are ready for targeting. We'll
 		// have to connect again later for providers and so on.

terraform/graph_builder_import.go

@@ -55,26 +55,20 @@ func (b *ImportGraphBuilder) Steps() []GraphTransformer {
 		// Create all our resources from the configuration and state
 		&ConfigTransformer{Config: config},
 
+		// Add dynamic values
+		&RootVariableTransformer{Config: b.Config},
+		&ModuleVariableTransformer{Config: b.Config},
+		&LocalTransformer{Config: b.Config},
+		&OutputTransformer{Config: b.Config},
+
 		// Attach the configuration to any resources
 		&AttachResourceConfigTransformer{Config: b.Config},
 
 		// Add the import steps
 		&ImportStateTransformer{Targets: b.ImportTargets, Config: b.Config},
 
-		// Add root variables
-		&RootVariableTransformer{Config: b.Config},
-
 		TransformProviders(b.Components.ResourceProviders(), concreteProvider, config),
 
-		// Add the local values
-		&LocalTransformer{Config: b.Config},
-
-		// Add the outputs
-		&OutputTransformer{Config: b.Config},
-
-		// Add module variables
-		&ModuleVariableTransformer{Config: b.Config},
-
 		// Must attach schemas before ReferenceTransformer so that we can
 		// analyze the configuration to find references.
 		&AttachSchemaTransformer{Schemas: b.Schemas, Config: b.Config},
@@ -82,9 +76,7 @@ func (b *ImportGraphBuilder) Steps() []GraphTransformer {
 		// Create expansion nodes for all of the module calls. This must
 		// come after all other transformers that create nodes representing
 		// objects that can belong to modules.
-		&ModuleExpansionTransformer{
-			Config: b.Config,
-		},
+		&ModuleExpansionTransformer{Config: b.Config},
 
 		// Connect so that the references are ready for targeting. We'll
 		// have to connect again later for providers and so on.

terraform/graph_builder_plan.go

@@ -84,10 +84,10 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 			Config:   b.Config,
 		},
 
-		// Add the local values
+		// Add dynamic values
+		&RootVariableTransformer{Config: b.Config},
+		&ModuleVariableTransformer{Config: b.Config},
 		&LocalTransformer{Config: b.Config},
-
-		// Add the outputs
 		&OutputTransformer{Config: b.Config},
 
 		// Add orphan resources
@@ -106,29 +106,20 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 			State:           b.State,
 		},
 
+		// Attach the state
+		&AttachStateTransformer{State: b.State},
+
 		// Create orphan output nodes
-		&OrphanOutputTransformer{
-			Config: b.Config,
-			State:  b.State,
-		},
+		&OrphanOutputTransformer{Config: b.Config, State: b.State},
 
 		// Attach the configuration to any resources
 		&AttachResourceConfigTransformer{Config: b.Config},
 
-		// Attach the state
-		&AttachStateTransformer{State: b.State},
-
-		// Add root variables
-		&RootVariableTransformer{Config: b.Config},
-
+		// Provisioner-related transformations
 		&MissingProvisionerTransformer{Provisioners: b.Components.ResourceProvisioners()},
 		&ProvisionerTransformer{},
 
-		// Add module variables
-		&ModuleVariableTransformer{
-			Config: b.Config,
-		},
-
+		// add providers
 		TransformProviders(b.Components.ResourceProviders(), b.ConcreteProvider, b.Config),
 
 		// Remove modules no longer present in the config
@@ -141,10 +132,7 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 		// Create expansion nodes for all of the module calls. This must
 		// come after all other transformers that create nodes representing
 		// objects that can belong to modules.
-		&ModuleExpansionTransformer{
-			Concrete: b.ConcreteModule,
-			Config:   b.Config,
-		},
+		&ModuleExpansionTransformer{Concrete: b.ConcreteModule, Config: b.Config},
 
 		// Connect so that the references are ready for targeting. We'll
 		// have to connect again later for providers and so on.
@@ -156,9 +144,7 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 		&attachDataResourceDependenciesTransformer{},
 
 		// Target
-		&TargetsTransformer{
-			Targets: b.Targets,
-		},
+		&TargetsTransformer{Targets: b.Targets},
 
 		// Detect when create_before_destroy must be forced on for a particular
 		// node due to dependency edges, to avoid graph cycles during apply.
@@ -171,7 +157,6 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 
 		// Close opened plugin connections
 		&CloseProviderTransformer{},
-		&CloseProvisionerTransformer{},
 
 		// Close the root module
 		&CloseRootModuleTransformer{},

terraform/node_module_variable.go

@@ -153,13 +153,13 @@ func (n *nodeModuleVariable) Execute(ctx EvalContext, op walkOperation) error {
 	var err error
 
 	switch op {
-	case walkPlan, walkApply, walkDestroy:
-		vals, err = n.EvalModuleCallArgument(ctx, false)
+	case walkValidate:
+		vals, err = n.EvalModuleCallArgument(ctx, true)
 		if err != nil {
 			return err
 		}
-	case walkValidate:
-		vals, err = n.EvalModuleCallArgument(ctx, true)
+	default:
+		vals, err = n.EvalModuleCallArgument(ctx, false)
 		if err != nil {
 			return err
 		}

terraform/node_output.go

@@ -199,61 +199,55 @@ func (n *NodeApplyableOutput) References() []*addrs.Reference {
 
 // GraphNodeExecutable
 func (n *NodeApplyableOutput) Execute(ctx EvalContext, op walkOperation) error {
-	switch op {
-	// Everything except walkImport
-	case walkEval, walkPlan, walkApply, walkValidate, walkDestroy, walkPlanDestroy:
-		// This has to run before we have a state lock, since evaluation also
-		// reads the state
-		val, diags := ctx.EvaluateExpr(n.Config.Expr, cty.DynamicPseudoType, nil)
-		// We'll handle errors below, after we have loaded the module.
+	// This has to run before we have a state lock, since evaluation also
+	// reads the state
+	val, diags := ctx.EvaluateExpr(n.Config.Expr, cty.DynamicPseudoType, nil)
+	// We'll handle errors below, after we have loaded the module.
 
-		// Outputs don't have a separate mode for validation, so validate
-		// depends_on expressions here too
-		diags = diags.Append(validateDependsOn(ctx, n.Config.DependsOn))
+	// Outputs don't have a separate mode for validation, so validate
+	// depends_on expressions here too
+	diags = diags.Append(validateDependsOn(ctx, n.Config.DependsOn))
 
-		// Ensure that non-sensitive outputs don't include sensitive values
-		_, marks := val.UnmarkDeep()
-		_, hasSensitive := marks["sensitive"]
-		if !n.Config.Sensitive && hasSensitive {
-			diags = diags.Append(&hcl.Diagnostic{
-				Severity: hcl.DiagError,
-				Summary:  "Output refers to sensitive values",
-				Detail:   "Expressions used in outputs can only refer to sensitive values if the sensitive attribute is true.",
-				Subject:  n.Config.DeclRange.Ptr(),
-			})
-		}
+	// Ensure that non-sensitive outputs don't include sensitive values
+	_, marks := val.UnmarkDeep()
+	_, hasSensitive := marks["sensitive"]
+	if !n.Config.Sensitive && hasSensitive {
+		diags = diags.Append(&hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Output refers to sensitive values",
+			Detail:   "Expressions used in outputs can only refer to sensitive values if the sensitive attribute is true.",
+			Subject:  n.Config.DeclRange.Ptr(),
+		})
+	}
 
-		state := ctx.State()
-		if state == nil {
-			return nil
-		}
-
-		changes := ctx.Changes() // may be nil, if we're not working on a changeset
-
-		// handling the interpolation error
-		if diags.HasErrors() {
-			if flagWarnOutputErrors {
-				log.Printf("[ERROR] Output interpolation %q failed: %s", n.Addr, diags.Err())
-				// if we're continuing, make sure the output is included, and
-				// marked as unknown. If the evaluator was able to find a type
-				// for the value in spite of the error then we'll use it.
-				n.setValue(state, changes, cty.UnknownVal(val.Type()))
-				return EvalEarlyExitError{}
-			}
-			return diags.Err()
-		}
-		n.setValue(state, changes, val)
-
-		// If we were able to evaluate a new value, we can update that in the
-		// refreshed state as well.
-		if state = ctx.RefreshState(); state != nil && val.IsWhollyKnown() {
-			n.setValue(state, changes, val)
-		}
-
-		return nil
-	default:
+	state := ctx.State()
+	if state == nil {
 		return nil
 	}
+
+	changes := ctx.Changes() // may be nil, if we're not working on a changeset
+
+	// handling the interpolation error
+	if diags.HasErrors() {
+		if flagWarnOutputErrors {
+			log.Printf("[ERROR] Output interpolation %q failed: %s", n.Addr, diags.Err())
+			// if we're continuing, make sure the output is included, and
+			// marked as unknown. If the evaluator was able to find a type
+			// for the value in spite of the error then we'll use it.
+			n.setValue(state, changes, cty.UnknownVal(val.Type()))
+			return EvalEarlyExitError{}
+		}
+		return diags.Err()
+	}
+	n.setValue(state, changes, val)
+
+	// If we were able to evaluate a new value, we can update that in the
+	// refreshed state as well.
+	if state = ctx.RefreshState(); state != nil && val.IsWhollyKnown() {
+		n.setValue(state, changes, val)
+	}
+
+	return nil
 }
 
 // dag.GraphNodeDotter impl.

terraform/node_resource_destroy.go

@@ -136,133 +136,130 @@ func (n *NodeDestroyResourceInstance) Execute(ctx EvalContext, op walkOperation)
 	var state *states.ResourceInstanceObject
 	var provisionerErr error
 
-	switch op {
-	case walkApply, walkDestroy:
-		provider, providerSchema, err := GetProvider(ctx, n.ResolvedProvider)
+	provider, providerSchema, err := GetProvider(ctx, n.ResolvedProvider)
+	if err != nil {
+		return err
+	}
+
+	changeApply, err = n.readDiff(ctx, providerSchema)
+	if err != nil {
+		return err
+	}
+
+	evalReduceDiff := &EvalReduceDiff{
+		Addr:      addr.Resource,
+		InChange:  &changeApply,
+		Destroy:   true,
+		OutChange: &changeApply,
+	}
+	_, err = evalReduceDiff.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
+	// EvalReduceDiff may have simplified our planned change
+	// into a NoOp if it does not require destroying.
+	if changeApply == nil || changeApply.Action == plans.NoOp {
+		return EvalEarlyExitError{}
+	}
+
+	state, err = n.ReadResourceInstanceState(ctx, addr)
+	if err != nil {
+		return err
+	}
+
+	// Exit early if the state object is null after reading the state
+	if state == nil || state.Value.IsNull() {
+		return EvalEarlyExitError{}
+	}
+
+	evalApplyPre := &EvalApplyPre{
+		Addr:   addr.Resource,
+		State:  &state,
+		Change: &changeApply,
+	}
+	_, err = evalApplyPre.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
+	// Run destroy provisioners if not tainted
+	if state != nil && state.Status != states.ObjectTainted {
+		evalApplyProvisioners := &EvalApplyProvisioners{
+			Addr:           addr.Resource,
+			State:          &state,
+			ResourceConfig: n.Config,
+			Error:          &provisionerErr,
+			When:           configs.ProvisionerWhenDestroy,
+		}
+		_, err := evalApplyProvisioners.Eval(ctx)
 		if err != nil {
 			return err
 		}
-
-		changeApply, err = n.readDiff(ctx, providerSchema)
-		if err != nil {
-			return err
-		}
-
-		evalReduceDiff := &EvalReduceDiff{
-			Addr:      addr.Resource,
-			InChange:  &changeApply,
-			Destroy:   true,
-			OutChange: &changeApply,
-		}
-		_, err = evalReduceDiff.Eval(ctx)
-		if err != nil {
-			return err
-		}
-
-		// EvalReduceDiff may have simplified our planned change
-		// into a NoOp if it does not require destroying.
-		if changeApply == nil || changeApply.Action == plans.NoOp {
-			return EvalEarlyExitError{}
-		}
-
-		state, err = n.ReadResourceInstanceState(ctx, addr)
-		if err != nil {
-			return err
-		}
-
-		// Exit early if the state object is null after reading the state
-		if state == nil || state.Value.IsNull() {
-			return EvalEarlyExitError{}
-		}
-
-		evalApplyPre := &EvalApplyPre{
-			Addr:   addr.Resource,
-			State:  &state,
-			Change: &changeApply,
-		}
-		_, err = evalApplyPre.Eval(ctx)
-		if err != nil {
-			return err
-		}
-
-		// Run destroy provisioners if not tainted
-		if state != nil && state.Status != states.ObjectTainted {
-			evalApplyProvisioners := &EvalApplyProvisioners{
-				Addr:           addr.Resource,
-				State:          &state,
-				ResourceConfig: n.Config,
-				Error:          &provisionerErr,
-				When:           configs.ProvisionerWhenDestroy,
+		if provisionerErr != nil {
+			// If we have a provisioning error, then we just call
+			// the post-apply hook now.
+			evalApplyPost := &EvalApplyPost{
+				Addr:  addr.Resource,
+				State: &state,
+				Error: &provisionerErr,
 			}
-			_, err := evalApplyProvisioners.Eval(ctx)
+			_, err = evalApplyPost.Eval(ctx)
 			if err != nil {
 				return err
 			}
-			if provisionerErr != nil {
-				// If we have a provisioning error, then we just call
-				// the post-apply hook now.
-				evalApplyPost := &EvalApplyPost{
-					Addr:  addr.Resource,
-					State: &state,
-					Error: &provisionerErr,
-				}
-				_, err = evalApplyPost.Eval(ctx)
-				if err != nil {
-					return err
-				}
-			}
 		}
+	}
 
-		// Managed resources need to be destroyed, while data sources
-		// are only removed from state.
-		if addr.Resource.Resource.Mode == addrs.ManagedResourceMode {
-			evalApply := &EvalApply{
-				Addr:           addr.Resource,
-				Config:         nil, // No configuration because we are destroying
-				State:          &state,
-				Change:         &changeApply,
-				Provider:       &provider,
-				ProviderAddr:   n.ResolvedProvider,
-				ProviderMetas:  n.ProviderMetas,
-				ProviderSchema: &providerSchema,
-				Output:         &state,
-				Error:          &provisionerErr,
-			}
-			_, err = evalApply.Eval(ctx)
-			if err != nil {
-				return err
-			}
-
-			evalWriteState := &EvalWriteState{
-				Addr:           addr.Resource,
-				ProviderAddr:   n.ResolvedProvider,
-				ProviderSchema: &providerSchema,
-				State:          &state,
-			}
-			_, err = evalWriteState.Eval(ctx)
-			if err != nil {
-				return err
-			}
-		} else {
-			log.Printf("[TRACE] NodeDestroyResourceInstance: removing state object for %s", n.Addr)
-			state := ctx.State()
-			state.SetResourceInstanceCurrent(n.Addr, nil, n.ResolvedProvider)
+	// Managed resources need to be destroyed, while data sources
+	// are only removed from state.
+	if addr.Resource.Resource.Mode == addrs.ManagedResourceMode {
+		evalApply := &EvalApply{
+			Addr:           addr.Resource,
+			Config:         nil, // No configuration because we are destroying
+			State:          &state,
+			Change:         &changeApply,
+			Provider:       &provider,
+			ProviderAddr:   n.ResolvedProvider,
+			ProviderMetas:  n.ProviderMetas,
+			ProviderSchema: &providerSchema,
+			Output:         &state,
+			Error:          &provisionerErr,
 		}
-
-		evalApplyPost := &EvalApplyPost{
-			Addr:  addr.Resource,
-			State: &state,
-			Error: &provisionerErr,
-		}
-		_, err = evalApplyPost.Eval(ctx)
+		_, err = evalApply.Eval(ctx)
 		if err != nil {
 			return err
 		}
 
-		err = UpdateStateHook(ctx)
+		evalWriteState := &EvalWriteState{
+			Addr:           addr.Resource,
+			ProviderAddr:   n.ResolvedProvider,
+			ProviderSchema: &providerSchema,
+			State:          &state,
+		}
+		_, err = evalWriteState.Eval(ctx)
 		if err != nil {
 			return err
 		}
+	} else {
+		log.Printf("[TRACE] NodeDestroyResourceInstance: removing state object for %s", n.Addr)
+		state := ctx.State()
+		state.SetResourceInstanceCurrent(n.Addr, nil, n.ResolvedProvider)
+	}
+
+	evalApplyPost := &EvalApplyPost{
+		Addr:  addr.Resource,
+		State: &state,
+		Error: &provisionerErr,
+	}
+	_, err = evalApplyPost.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
+	err = UpdateStateHook(ctx)
+	if err != nil {
+		return err
 	}
 
 	return nil

terraform/node_resource_destroy_deposed.go

@@ -76,44 +76,41 @@ func (n *NodePlanDeposedResourceInstanceObject) Execute(ctx EvalContext, op walk
 	var change *plans.ResourceInstanceChange
 	var state *states.ResourceInstanceObject
 
-	switch op {
-	case walkPlan, walkPlanDestroy:
-
-		readStateDeposed := &EvalReadStateDeposed{
-			Addr:           addr.Resource,
-			Output:         &state,
-			Key:            n.DeposedKey,
-			Provider:       &provider,
-			ProviderSchema: &providerSchema,
-		}
-		_, err = readStateDeposed.Eval(ctx)
-		if err != nil {
-			return err
-		}
-
-		diffDestroy := &EvalDiffDestroy{
-			Addr:         addr.Resource,
-			ProviderAddr: n.ResolvedProvider,
-			DeposedKey:   n.DeposedKey,
-			State:        &state,
-			Output:       &change,
-		}
-		_, err = diffDestroy.Eval(ctx)
-		if err != nil {
-			return err
-		}
-
-		writeDiff := &EvalWriteDiff{
-			Addr:           addr.Resource,
-			DeposedKey:     n.DeposedKey,
-			ProviderSchema: &providerSchema,
-			Change:         &change,
-		}
-		_, err = writeDiff.Eval(ctx)
-		if err != nil {
-			return err
-		}
+	readStateDeposed := &EvalReadStateDeposed{
+		Addr:           addr.Resource,
+		Output:         &state,
+		Key:            n.DeposedKey,
+		Provider:       &provider,
+		ProviderSchema: &providerSchema,
 	}
+	_, err = readStateDeposed.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
+	diffDestroy := &EvalDiffDestroy{
+		Addr:         addr.Resource,
+		ProviderAddr: n.ResolvedProvider,
+		DeposedKey:   n.DeposedKey,
+		State:        &state,
+		Output:       &change,
+	}
+	_, err = diffDestroy.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
+	writeDiff := &EvalWriteDiff{
+		Addr:           addr.Resource,
+		DeposedKey:     n.DeposedKey,
+		ProviderSchema: &providerSchema,
+		Change:         &change,
+	}
+	_, err = writeDiff.Eval(ctx)
+	if err != nil {
+		return err
+	}
+
 	return nil
 }
 

terraform/transform_config.go

@@ -25,9 +25,6 @@ type ConfigTransformer struct {
 	// Module is the module to add resources from.
 	Config *configs.Config
 
-	// Unique will only add resources that aren't already present in the graph.
-	Unique bool
-
 	// Mode will only add resources that match the given mode
 	ModeFilter bool
 	Mode       addrs.ResourceMode

terraform/transform_reference.go

@@ -301,7 +301,7 @@ func (m ReferenceMap) References(v dag.Vertex) []dag.Vertex {
 			case addrs.ModuleCallInstance:
 				subject = ri.Call
 			default:
-				log.Printf("[WARN] ReferenceTransformer: reference not found: %q", subject)
+				log.Printf("[INFO] ReferenceTransformer: reference not found: %q", subject)
 				continue
 			}
 			key = m.referenceMapKey(v, subject)