Middleware can be inserted before or after defaults

[ridiculous]

Builds onto the new middleware stack introduced in #1390. This is useful because it allows positioning of middleware around default Grape middleware.

[dblock]

I think the CHANGELOG entry below covers this functionality, I would just add , [#1393] to it. No big deal.

[dblock]

Very nice, merged.

[rosa]

Nice :) Although with only #1390 you could position your middleware around the default middleware, for example with:

insert_before Grape::Middleware::Error, MyMiddleware

Just out of curiosity, what was the use case not considered?

[dblock]

Sorry @rosa I think I don't understand the question :)

[rosa]

@dblock sorry for not explaining myself better! 😅 I meant to ask about which new feature this PR introduces that wasn't already covered by #1390. I believed you could already position middleware around defaults, so I was wondering if I had missed some use case that is now covered.

[ridiculous]

@rosa It let's you reference middleware added after https://github.com/ruby-grape/grape/pull/1393/files#diff-8e15cddb80f42ca7d43872846d80ecbeR263, which is pretty much just the formatter and versioner

[rosa]

Ah, got it! I was using my changes just to insert a middleware before Grape::Middleware::Error, which was fine but as you noticed, it didn't cover all cases. Thanks for the clarification! 😄