Vendor dependencies with vndr

This fixes issue #123

1 files changed, 44 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/terraform/terraform/transform_vertex.go b/vendor/github.com/hashicorp/terraform/terraform/transform_vertex.go
new file mode 100644
index 00000000..6b1293fc
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/terraform/transform_vertex.go
@@ -0,0 +1,44 @@
+package terraform
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform/dag"
+)
+
+// VertexTransformer is a GraphTransformer that transforms vertices
+// using the GraphVertexTransformers. The Transforms are run in sequential
+// order. If a transform replaces a vertex then the next transform will see
+// the new vertex.
+type VertexTransformer struct {
+	Transforms []GraphVertexTransformer
+}
+
+func (t *VertexTransformer) Transform(g *Graph) error {
+	for _, v := range g.Vertices() {
+		for _, vt := range t.Transforms {
+			newV, err := vt.Transform(v)
+			if err != nil {
+				return err
+			}
+
+			// If the vertex didn't change, then don't do anything more
+			if newV == v {
+				continue
+			}
+
+			// Vertex changed, replace it within the graph
+			if ok := g.Replace(v, newV); !ok {
+				// This should never happen, big problem
+				return fmt.Errorf(
+					"Failed to replace %s with %s!\n\nSource: %#v\n\nTarget: %#v",
+					dag.VertexName(v), dag.VertexName(newV), v, newV)
+			}
+
+			// Replace v so that future transforms use the proper vertex
+			v = newV
+		}
+	}
+
+	return nil
+}