Easing in to RuboCop seems prudent, to keep making forward progress rather than just polishing incomplete code.
For me this meant passing the
--only Lint option to RuboCop so only errors and warnings get flagged (for the time being).
In Atom the steps I took were:
"linter-rubocop": command: "/Users/<name>/.rbenv/shims/rubocop --only Lint"
/Users/<name> with the path to your home directory. I briefly tried using a relative path to the shim (
~/.rbenv/shims/rubocop) but it broke Atom.