102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
package terraform
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import (
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"fmt"
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"github.com/hashicorp/terraform/dag"
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)
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// GraphNodeOutput is an interface that nodes that are outputs must
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// implement. The OutputName returned is the name of the output key
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// that they manage.
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type GraphNodeOutput interface {
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OutputName() string
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}
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// AddOutputOrphanTransformer is a transformer that adds output orphans
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// to the graph. Output orphans are outputs that are no longer in the
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// configuration and therefore need to be removed from the state.
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//
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// NOTE: This is the _old_ way to add output orphans that is used with
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// legacy graph builders. The new way is OrphanOutputTransformer.
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type AddOutputOrphanTransformer struct {
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State *State
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}
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func (t *AddOutputOrphanTransformer) Transform(g *Graph) error {
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// Get the state for this module. If we have no state, we have no orphans
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state := t.State.ModuleByPath(g.Path)
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if state == nil {
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return nil
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}
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// Create the set of outputs we do have in the graph
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found := make(map[string]struct{})
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for _, v := range g.Vertices() {
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on, ok := v.(GraphNodeOutput)
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if !ok {
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continue
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}
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found[on.OutputName()] = struct{}{}
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}
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// Go over all the outputs. If we don't have a graph node for it,
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// create it. It doesn't need to depend on anything, since its just
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// setting it empty.
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for k, _ := range state.Outputs {
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if _, ok := found[k]; ok {
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continue
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}
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g.Add(&graphNodeOrphanOutput{OutputName: k})
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}
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return nil
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}
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type graphNodeOrphanOutput struct {
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OutputName string
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}
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func (n *graphNodeOrphanOutput) Name() string {
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return fmt.Sprintf("output.%s (orphan)", n.OutputName)
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}
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func (n *graphNodeOrphanOutput) EvalTree() EvalNode {
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return &EvalOpFilter{
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Ops: []walkOperation{walkApply, walkDestroy, walkRefresh},
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Node: &EvalDeleteOutput{
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Name: n.OutputName,
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},
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}
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}
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// GraphNodeFlattenable impl.
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func (n *graphNodeOrphanOutput) Flatten(p []string) (dag.Vertex, error) {
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return &graphNodeOrphanOutputFlat{
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graphNodeOrphanOutput: n,
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PathValue: p,
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}, nil
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}
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type graphNodeOrphanOutputFlat struct {
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*graphNodeOrphanOutput
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PathValue []string
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}
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func (n *graphNodeOrphanOutputFlat) Name() string {
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return fmt.Sprintf(
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"%s.%s", modulePrefixStr(n.PathValue), n.graphNodeOrphanOutput.Name())
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}
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func (n *graphNodeOrphanOutputFlat) EvalTree() EvalNode {
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return &EvalOpFilter{
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Ops: []walkOperation{walkApply, walkDestroy, walkRefresh},
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Node: &EvalDeleteOutput{
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Name: n.OutputName,
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},
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}
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}
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