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package terraform
import (
"github.com/hashicorp/terraform/config/module"
)
// OutputTransformer is a GraphTransformer that adds all the outputs
// in the configuration to the graph.
//
// This is done for the apply graph builder even if dependent nodes
// aren't changing since there is no downside: the state will be available
// even if the dependent items aren't changing.
type OutputTransformer struct {
Module *module.Tree
}
func (t *OutputTransformer) Transform(g *Graph) error {
return t.transform(g, t.Module)
}
func (t *OutputTransformer) transform(g *Graph, m *module.Tree) error {
// If no config, no outputs
if m == nil {
return nil
}
// Transform all the children. We must do this first because
// we can reference module outputs and they must show up in the
// reference map.
for _, c := range m.Children() {
if err := t.transform(g, c); err != nil {
return err
}
}
// If we have no outputs, we're done!
os := m.Config().Outputs
if len(os) == 0 {
return nil
}
// Add all outputs here
for _, o := range os {
// Build the node.
//
// NOTE: For now this is just an "applyable" output. As we build
// new graph builders for the other operations I suspect we'll
// find a way to parameterize this, require new transforms, etc.
node := &NodeApplyableOutput{
PathValue: normalizeModulePath(m.Path()),
Config: o,
}
// Add it!
g.Add(node)
}
return nil
}
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