Requires using Ash, but ash_postgres can do at least some of this. I don’t recall if we extract enums or not but that could be added likely. I think your question was tagged ash-postgres on happenstance not because you actually were using Ash, but thats what tagged me to come look 
If you use the --fragments option, it will keep a separate file per resource updated which is “managed” so as things change you can rerun and it will replace that fragment.
