Resource dependencies are by nature an unordered collection, but they're
persisted to state as a JSON array (in random order). This makes a mess for
`terraform apply -refresh-only`, which sees the new random order as a change
that requires the user to approve a state update.
(As an additional problem on top of that, the user interface for refresh-only
runs doesn't expect to see that as a type of change, so it says "no changes!
would you like to update to reflect these detected changes?")
This commit changes `ResourceInstanceObject.Encode()` to sort the in-memory
slice of dependencies (lexically, by address) before passing it on to be
compared and persisted. This appears to fix the observed UI issues with a
minimum of logic changes.
This is part of a general effort to move all of Terraform's non-library
package surface under internal in order to reinforce that these are for
internal use within Terraform only.
If you were previously importing packages under this prefix into an
external codebase, you could pin to an earlier release tag as an interim
solution until you've make a plan to achieve the same functionality some
other way.
Nick Fagerlund