1 files changed, 49 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/terraform/terraform/eval_filter_operation.go b/vendor/github.com/hashicorp/terraform/terraform/eval_filter_operation.go
new file mode 100644
index 00000000..1a55f024
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/terraform/eval_filter_operation.go
@@ -0,0 +1,49 @@
+package terraform
+
+// EvalNodeOpFilterable is an interface that EvalNodes can implement
+// to be filterable by the operation that is being run on Terraform.
+type EvalNodeOpFilterable interface {
+	IncludeInOp(walkOperation) bool
+}
+
+// EvalNodeFilterOp returns a filter function that filters nodes that
+// include themselves in specific operations.
+func EvalNodeFilterOp(op walkOperation) EvalNodeFilterFunc {
+	return func(n EvalNode) EvalNode {
+		include := true
+		if of, ok := n.(EvalNodeOpFilterable); ok {
+			include = of.IncludeInOp(op)
+		}
+		if include {
+			return n
+		}
+
+		return EvalNoop{}
+	}
+}
+
+// EvalOpFilter is an EvalNode implementation that is a proxy to
+// another node but filters based on the operation.
+type EvalOpFilter struct {
+	// Ops is the list of operations to include this node in.
+	Ops []walkOperation
+
+	// Node is the node to execute
+	Node EvalNode
+}
+
+// TODO: test
+func (n *EvalOpFilter) Eval(ctx EvalContext) (interface{}, error) {
+	return EvalRaw(n.Node, ctx)
+}
+
+// EvalNodeOpFilterable impl.
+func (n *EvalOpFilter) IncludeInOp(op walkOperation) bool {
+	for _, v := range n.Ops {
+		if v == op {
+			return true
+		}
+	}
+
+	return false
+}