Ruby 3 support?

[pbstriker38]

When setting up a simple server with ruby 3.0.0-rc1 I get the following error:

ArgumentError: wrong number of arguments (given 2, expected 1)
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/middleware/base.rb:18:in `initialize'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:158:in `new'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:158:in `block in use'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:235:in `block in to_app'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:235:in `each'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:235:in `inject'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/builder.rb:235:in `to_app'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/endpoint.rb:323:in `build_stack'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/endpoint.rb:355:in `block in lazy_initialize!'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/endpoint.rb:351:in `synchronize'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/endpoint.rb:351:in `lazy_initialize!'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/endpoint.rb:224:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router/route.rb:58:in `exec'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:116:in `process_route'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:72:in `block in identity'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:91:in `transaction'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:70:in `identity'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:55:in `block in call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:132:in `with_optimization'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/router.rb:54:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/api/instance.rb:167:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/api/instance.rb:71:in `call!'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/api/instance.rb:66:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/bundler/gems/grape-0f250dc0f574/lib/grape/api.rb:68:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/tempfile_reaper.rb:15:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/lint.rb:50:in `_call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/lint.rb:38:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/show_exceptions.rb:23:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/common_logger.rb:38:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/content_length.rb:17:in `call'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/rack-2.2.3/lib/rack/handler/webrick.rb:95:in `service'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/webrick-1.7.0/lib/webrick/httpserver.rb:140:in `service'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/webrick-1.7.0/lib/webrick/httpserver.rb:96:in `run'
  /.rbenv/versions/3.0.0-rc1/lib/ruby/gems/3.0.0/gems/webrick-1.7.0/lib/webrick/server.rb:310:in `block in start_thread'

Here is the simple app I'm using to test this

Gemfile

# frozen_string_literal: true

source 'https://rubygems.org'

git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }

gem 'rack', '~> 2.2'
gem 'grape', git: 'https://github.com/ruby-grape/grape', ref: '0f250dc'
gem 'webrick'

ruby '3.0.0'

config.ru

# frozen_string_literal: true

require 'grape'

class API < Grape::API
  prefix :api
  version 'v1'
  format :json

  desc 'Health check'
  get :health do
    status 200
    'ok'
  end
end

run API

I'm able to resolve this issue by changing this line to:

def initialize(app, options={})

and this line to:

def initialize(app, options)

I'm not sure if this is the proper fix though.

[dnesteryuk]

@pbstriker38 Awesome to see that people already try Ruby 3 😄 Personally, I've not tested any project/library with Ruby 3. Grape might be good start though 🤔

[patrykboch]

@pbstriker38 I've started testing that!
FYI You can expect the error mentioned above since Ruby 3.0 dropped the support of keyword arguments in this context see: https://www.ruby-lang.org/en/news/2019/12/12/separation-of-positional-and-keyword-arguments-in-ruby-3-0/

I'm trying to identify and fix all of the occurrences concerning the issue eg. patrykboch@15c932b

You can expect a PR soon!

[pbstriker38]

Thanks @patrykboch. That's good to hear.

[dblock]

Thank you! Looking forward.

[dblock]

Closed via #2145