1 files changed, 29 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/hil/transform_fixed.go b/vendor/github.com/hashicorp/hil/transform_fixed.go
new file mode 100644
index 0000000..e69df29
--- /dev/null
+++ b/vendor/github.com/hashicorp/hil/transform_fixed.go
@@ -0,0 +1,29 @@
+package hil
+
+import (
+        "github.com/hashicorp/hil/ast"
+)
+
+// FixedValueTransform transforms an AST to return a fixed value for
+// all interpolations. i.e. you can make "hi ${anything}" always
+// turn into "hi foo".
+//
+// The primary use case for this is for config validations where you can
+// verify that interpolations result in a certain type of string.
+func FixedValueTransform(root ast.Node, Value *ast.LiteralNode) ast.Node {
+        // We visit the nodes in top-down order
+        result := root
+        switch n := result.(type) {
+        case *ast.Output:
+                for i, v := range n.Exprs {
+                        n.Exprs[i] = FixedValueTransform(v, Value)
+                }
+        case *ast.LiteralNode:
+                // We keep it as-is
+        default:
+                // Anything else we replace
+                result = Value
+        }
+
+        return result
+}