1 files changed, 50 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/terraform/terraform/transform_provider_disable.go b/vendor/github.com/hashicorp/terraform/terraform/transform_provider_disable.go
new file mode 100644
index 00000000..d9919f3a
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/terraform/transform_provider_disable.go
@@ -0,0 +1,50 @@
+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
+}