opentofu/terraform/node_output.go
James Bardin d31fe5ab9d delete outputs during destroy
Now that outputs are always evaluated, we still need a way to remove
them from state when they are destroyed.

Previously, outputs were removed during destroy from the same
"Applyable" node type that evaluates them. Now that we need to possibly
both evaluate and remove output during an apply, we add a new node -
NodeDestroyableOutput.

This new node is added to the graph by the DestroyOutputTransformer,
which make the new destroy node depend on all descendants of the output
node.  This ensures that the output remains in the state as long as
everything which may interpolate the output still exists.
2018-01-29 19:30:04 -05:00

148 lines
3.7 KiB
Go

package terraform
import (
"fmt"
"strings"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/dag"
)
// NodeApplyableOutput represents an output that is "applyable":
// it is ready to be applied.
type NodeApplyableOutput struct {
PathValue []string
Config *config.Output // Config is the output in the config
}
func (n *NodeApplyableOutput) Name() string {
result := fmt.Sprintf("output.%s", n.Config.Name)
if len(n.PathValue) > 1 {
result = fmt.Sprintf("%s.%s", modulePrefixStr(n.PathValue), result)
}
return result
}
// GraphNodeSubPath
func (n *NodeApplyableOutput) Path() []string {
return n.PathValue
}
// RemovableIfNotTargeted
func (n *NodeApplyableOutput) RemoveIfNotTargeted() bool {
// We need to add this so that this node will be removed if
// it isn't targeted or a dependency of a target.
return true
}
// GraphNodeTargetDownstream
func (n *NodeApplyableOutput) TargetDownstream(targetedDeps, untargetedDeps *dag.Set) bool {
// If any of the direct dependencies of an output are targeted then
// the output must always be targeted as well, so its value will always
// be up-to-date at the completion of an apply walk.
return true
}
// GraphNodeReferenceable
func (n *NodeApplyableOutput) ReferenceableName() []string {
name := fmt.Sprintf("output.%s", n.Config.Name)
return []string{name}
}
// GraphNodeReferencer
func (n *NodeApplyableOutput) References() []string {
var result []string
result = append(result, n.Config.DependsOn...)
result = append(result, ReferencesFromConfig(n.Config.RawConfig)...)
for _, v := range result {
split := strings.Split(v, "/")
for i, s := range split {
split[i] = s + ".destroy"
}
result = append(result, strings.Join(split, "/"))
}
return result
}
// GraphNodeEvalable
func (n *NodeApplyableOutput) EvalTree() EvalNode {
return &EvalSequence{
Nodes: []EvalNode{
&EvalOpFilter{
// Don't let interpolation errors stop Input, since it happens
// before Refresh.
Ops: []walkOperation{walkInput},
Node: &EvalWriteOutput{
Name: n.Config.Name,
Sensitive: n.Config.Sensitive,
Value: n.Config.RawConfig,
ContinueOnErr: true,
},
},
&EvalOpFilter{
Ops: []walkOperation{walkRefresh, walkPlan, walkApply, walkValidate, walkDestroy, walkPlanDestroy},
Node: &EvalWriteOutput{
Name: n.Config.Name,
Sensitive: n.Config.Sensitive,
Value: n.Config.RawConfig,
},
},
},
}
}
// NodeDestroyableOutput represents an output that is "destroybale":
// its application will remove the output from the state.
type NodeDestroyableOutput struct {
PathValue []string
Config *config.Output // Config is the output in the config
}
func (n *NodeDestroyableOutput) Name() string {
result := fmt.Sprintf("output.%s (destroy)", n.Config.Name)
if len(n.PathValue) > 1 {
result = fmt.Sprintf("%s.%s", modulePrefixStr(n.PathValue), result)
}
return result
}
// GraphNodeSubPath
func (n *NodeDestroyableOutput) Path() []string {
return n.PathValue
}
// RemovableIfNotTargeted
func (n *NodeDestroyableOutput) RemoveIfNotTargeted() bool {
// We need to add this so that this node will be removed if
// it isn't targeted or a dependency of a target.
return true
}
// GraphNodeReferencer
func (n *NodeDestroyableOutput) References() []string {
var result []string
result = append(result, n.Config.DependsOn...)
result = append(result, ReferencesFromConfig(n.Config.RawConfig)...)
for _, v := range result {
split := strings.Split(v, "/")
for i, s := range split {
split[i] = s + ".destroy"
}
result = append(result, strings.Join(split, "/"))
}
return result
}
// GraphNodeEvalable
func (n *NodeDestroyableOutput) EvalTree() EvalNode {
return &EvalDeleteOutput{
Name: n.Config.Name,
}
}