terraform: TargetsTransformer on destroy plan

This enables targeting to work properly on planning destroys

terraform/context.go

@@ -530,6 +530,7 @@ func (c *Context) Plan() (*Plan, error) {
 		graph, err = (&DestroyPlanGraphBuilder{
 			Module:  c.module,
 			State:   c.state,
+			Targets: c.targets,
 		}).Build(RootModulePath)
 	} else {
 		graph, err = c.Graph(&ContextGraphOpts{Validate: true})

terraform/graph_builder_destroy_plan.go

@@ -16,6 +16,9 @@ type DestroyPlanGraphBuilder struct {
 
 	// State is the current state
 	State *State
+
+	// Targets are resources to target
+	Targets []string
 }
 
 // See GraphBuilder
@@ -41,6 +44,9 @@ func (b *DestroyPlanGraphBuilder) Steps() []GraphTransformer {
 			State:    b.State,
 		},
 
+		// Target
+		&TargetsTransformer{Targets: b.Targets},
+
 		// Attach the configuration to any resources
 		&AttachResourceConfigTransformer{Module: b.Module},
 

terraform/graph_config_node.go

@@ -24,8 +24,6 @@ type graphNodeConfig interface {
 // configuration graph need to implement in order to be be addressed / targeted
 // properly.
 type GraphNodeAddressable interface {
-	graphNodeConfig
-
 	ResourceAddress() *ResourceAddress
 }
 
@@ -35,7 +33,5 @@ type GraphNodeAddressable interface {
 // provided will contain every target provided, and each implementing graph
 // node must filter this list to targets considered relevant.
 type GraphNodeTargetable interface {
-	GraphNodeAddressable
-
 	SetTargets([]ResourceAddress)
 }

terraform/node_resource_abstract.go

@@ -28,6 +28,8 @@ type NodeAbstractResource struct {
 
 	Config        *config.Resource // Config is the resource in the config
 	ResourceState *ResourceState   // ResourceState is the ResourceState for this
+
+	Targets []ResourceAddress // Set from GraphNodeTargetable
 }
 
 func (n *NodeAbstractResource) Name() string {
@@ -111,6 +113,16 @@ func (n *NodeAbstractResource) ResourceAddr() *ResourceAddress {
 	return n.Addr
 }
 
+// GraphNodeAddressable, TODO: remove, used by target, should unify
+func (n *NodeAbstractResource) ResourceAddress() *ResourceAddress {
+	return n.ResourceAddr()
+}
+
+// GraphNodeTargetable
+func (n *NodeAbstractResource) SetTargets(targets []ResourceAddress) {
+	n.Targets = targets
+}
+
 // GraphNodeAttachResourceState
 func (n *NodeAbstractResource) AttachResourceState(s *ResourceState) {
 	n.ResourceState = s

terraform/node_resource_destroy.go

@@ -63,6 +63,11 @@ func (n *NodeDestroyResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
 		View:  n.Config.Id(),
 	})
 
+	// Target
+	steps = append(steps, &TargetsTransformer{
+		ParsedTargets: n.Targets,
+	})
+
 	// Always end with the root being added
 	steps = append(steps, &RootTransformer{})
 

terraform/transform_targets.go

@@ -28,8 +28,10 @@ func (t *TargetsTransformer) Transform(g *Graph) error {
 		if err != nil {
 			return err
 		}
+
 		t.ParsedTargets = addrs
 	}
+
 	if len(t.ParsedTargets) > 0 {
 		targetedNodes, err := t.selectTargetedNodes(g, t.ParsedTargets)
 		if err != nil {
@@ -50,6 +52,7 @@ func (t *TargetsTransformer) Transform(g *Graph) error {
 			}
 		}
 	}
+
 	return nil
 }
 
@@ -62,6 +65,7 @@ func (t *TargetsTransformer) parseTargetAddresses() ([]ResourceAddress, error) {
 		}
 		addrs[i] = *ta
 	}
+
 	return addrs, nil
 }
 
@@ -107,6 +111,7 @@ func (t *TargetsTransformer) selectTargetedNodes(
 			}
 		}
 	}
+
 	return targetedNodes, nil
 }
 
@@ -116,12 +121,14 @@ func (t *TargetsTransformer) nodeIsTarget(
 	if !ok {
 		return false
 	}
+
 	addr := r.ResourceAddress()
 	for _, targetAddr := range addrs {
 		if targetAddr.Equals(addr) {
 			return true
 		}
 	}
+
 	return false
 }