104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package terraform
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import (
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"log"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/configs"
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"github.com/hashicorp/terraform/dag"
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)
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// OutputTransformer is a GraphTransformer that adds all the outputs
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// in the configuration to the graph.
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//
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// This is done for the apply graph builder even if dependent nodes
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// aren't changing since there is no downside: the state will be available
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// even if the dependent items aren't changing.
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type OutputTransformer struct {
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Config *configs.Config
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}
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func (t *OutputTransformer) Transform(g *Graph) error {
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return t.transform(g, t.Config)
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}
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func (t *OutputTransformer) transform(g *Graph, c *configs.Config) error {
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// If we have no config then there can be no outputs.
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if c == nil {
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return nil
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}
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// Transform all the children. We must do this first because
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// we can reference module outputs and they must show up in the
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// reference map.
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for _, cc := range c.Children {
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if err := t.transform(g, cc); err != nil {
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return err
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}
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}
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// Add plannable outputs to the graph, which will be dynamically expanded
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// into NodeApplyableOutputs to reflect possible expansion
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// through the presence of "count" or "for_each" on the modules.
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for _, o := range c.Module.Outputs {
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node := &NodePlannableOutput{
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Addr: addrs.OutputValue{Name: o.Name},
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Module: c.Path,
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Config: o,
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}
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log.Printf("[TRACE] OutputTransformer: adding %s as %T", o.Name, node)
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g.Add(node)
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}
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return nil
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}
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// DestroyOutputTransformer is a GraphTransformer that adds nodes to delete
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// outputs during destroy. We need to do this to ensure that no stale outputs
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// are ever left in the state.
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type DestroyOutputTransformer struct {
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Destroy bool
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}
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func (t *DestroyOutputTransformer) Transform(g *Graph) error {
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// Only clean root outputs on a full destroy
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if !t.Destroy {
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return nil
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}
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for _, v := range g.Vertices() {
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output, ok := v.(*NodePlannableOutput)
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if !ok {
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continue
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}
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// We only destroy root outputs
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if !output.Module.Equal(addrs.RootModule) {
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continue
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}
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// create the destroy node for this output
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node := &NodeDestroyableOutput{
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Addr: output.Addr.Absolute(addrs.RootModuleInstance),
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Config: output.Config,
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}
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log.Printf("[TRACE] creating %s", node.Name())
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g.Add(node)
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deps, err := g.Descendents(v)
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if err != nil {
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return err
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}
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// the destroy node must depend on the eval node
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deps.Add(v)
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for _, d := range deps {
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log.Printf("[TRACE] %s depends on %s", node.Name(), dag.VertexName(d))
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g.Connect(dag.BasicEdge(node, d))
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}
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}
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return nil
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}
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