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package terraform
import (
"fmt"
"github.com/hashicorp/terraform/dag"
)
// DisableProviderTransformer "disables" any providers that are not actually
// used by anything. This avoids the provider being initialized and configured.
// This both saves resources but also avoids errors since configuration
// may imply initialization which may require auth.
type DisableProviderTransformer struct{}
func (t *DisableProviderTransformer) Transform(g *Graph) error {
for _, v := range g.Vertices() {
// We only care about providers
pn, ok := v.(GraphNodeProvider)
if !ok || pn.ProviderName() == "" {
continue
}
// If we have dependencies, then don't disable
if g.UpEdges(v).Len() > 0 {
continue
}
// Get the path
var path []string
if pn, ok := v.(GraphNodeSubPath); ok {
path = pn.Path()
}
// Disable the provider by replacing it with a "disabled" provider
disabled := &NodeDisabledProvider{
NodeAbstractProvider: &NodeAbstractProvider{
NameValue: pn.ProviderName(),
PathValue: path,
},
}
if !g.Replace(v, disabled) {
panic(fmt.Sprintf(
"vertex disappeared from under us: %s",
dag.VertexName(v)))
}
}
return nil
}
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