terraform/config/testdata/validate-var-default-interp.../main.tf

variable "foo" {
  # This should be considered valid since the sequence is escaped and is
  # thus not actually an interpolation.
  default = "foo bar $${aws_instance.foo.bar}"
}
Allow escaped interpolation-like sequences in variable defaults The variable validator assumes that any AST node it gets from an interpolation walk is an indicator of an interpolation. Unfortunately, back in f223be15 we changed the interpolation walker to emit a LiteralNode as a way to signal that the result is a literal but not identical to the input due to escapes. The existence of this issue suggests a bit of a design smell in that the interpolation walker interface at first glance appears to skip over all literals, but it actually emits them in this one situation. In the long run we should perhaps think about whether the abstraction is right here, but this is a shallow, tactical change that fixes #13001. 2017-03-29 17:34:45 +02:00			`variable "foo" {`
			`# This should be considered valid since the sequence is escaped and is`
			`# thus not actually an interpolation.`
			`default = "foo bar $${aws_instance.foo.bar}"`
			`}`