• Add GetVersions method to goose.Provider, returns the current (max db) version and the latest (max filesystem) version. (#756)
• Clarify GetLatestVersion method MUST return ErrVersionNotFound if no latest migration is found. Previously it was returning a -1 and nil error, which was inconsistent with the rest of the API surface.
• Add GetLatestVersion implementations to all existing dialects. This is an optimization to avoid loading all migrations when only the latest version is needed. This uses the max function in SQL to get the latest version_id irrespective of the order of applied migrations.
  • Refactor existing portions of the code to use the new GetLatestVersion method.

Note, v3.21.0 was retracted due to a reported user issue #779 with Go modules and replace directives when using go run, hence the patch bump to v3.21.1.