It kind of sounds like you're describing Ansible. You use modules for common tasks like ensuring a package is installed, a file is present or has certain content, etc. It's declarative and imdempotent.
I've written some fairly complex stuff in Ansible. It is mostly declarative but you should be careful with assumptions about its idempotency, especially if you reach out for community modules.
No, I don't want to write Ansible configuration. I don't want to write any configuration. I just want to dump state and restore it. (To put it another way: I want to auto-generate ansible configuration based on an existing system, and then apply that configuration again later)
