Rule proposal: Re-enable all disables

[ptarjan]

In our codebase, people sometimes don't understand that

... code ...
# rubocop:disable SomeCop
... lots of code ...

actually turns it off for the whole file and not just the next line. (There is a postfix comment form but education with a large org is harder than technical enforcement).

Can we get a cop in the same vein as Lint/UnneededDisable which requires people to re-enable the cop within X lines? I'd like X to be 1 for us :)

[bbatsov]

Perhaps. Although probably it'd be better if the cop would simply infer whether it should be applied to a line, a block or a class/module/method. I'd accept such a feature, but I won't be able to work on it any time soon.

[tdeo]

I've just come across this issue. I've recently opened #4674, and just submitted this PR: #4937.

For now, the plan is only to force the presence of an enable statement at some point in the file, and I was planning to leave people responsible for the place they put it.