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package terraform
import (
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/dag"
)
// DestroyPlanGraphBuilder implements GraphBuilder and is responsible for
// planning a pure-destroy.
//
// Planning a pure destroy operation is simple because we can ignore most
// ordering configuration and simply reverse the state.
type DestroyPlanGraphBuilder struct {
// Module is the root module for the graph to build.
Module *module.Tree
// State is the current state
State *State
// Targets are resources to target
Targets []string
// Validate will do structural validation of the graph.
Validate bool
}
// See GraphBuilder
func (b *DestroyPlanGraphBuilder) Build(path []string) (*Graph, error) {
return (&BasicGraphBuilder{
Steps: b.Steps(),
Validate: b.Validate,
Name: "DestroyPlanGraphBuilder",
}).Build(path)
}
// See GraphBuilder
func (b *DestroyPlanGraphBuilder) Steps() []GraphTransformer {
concreteResource := func(a *NodeAbstractResource) dag.Vertex {
return &NodePlanDestroyableResource{
NodeAbstractResource: a,
}
}
steps := []GraphTransformer{
// Creates all the nodes represented in the state.
&StateTransformer{
Concrete: concreteResource,
State: b.State,
},
// Attach the configuration to any resources
&AttachResourceConfigTransformer{Module: b.Module},
// Destruction ordering. We require this only so that
// targeting below will prune the correct things.
&DestroyEdgeTransformer{Module: b.Module, State: b.State},
// Target. Note we don't set "Destroy: true" here since we already
// created proper destroy ordering.
&TargetsTransformer{Targets: b.Targets},
// Single root
&RootTransformer{},
}
return steps
}
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