Bundler paths possibly breaking rails console

[joearasin]

This is possibly a duplicate of #53 and #51 --

When I attempt to run a rails console based off of a relatively straightforward dockerfile:

FROM ruby:2.2

# install packages
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs

# throw errors if Gemfile has been modified since Gemfile.lock
RUN bundle config --global frozen 1

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
COPY Gemfile /usr/src/app/
COPY Gemfile.lock /usr/src/app/

RUN bundle install

COPY . /usr/src/app

CMD bundle exec rails s Puma -p 32000 -b '0.0.0.0'

I receive an Error:

/usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- bundler/setup (LoadError)
    from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/commands.rb:33:in `<module:Spring>'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/commands.rb:4:in `<top (required)>'
    from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application.rb:77:in `preload'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application.rb:143:in `serve'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application.rb:131:in `block in run'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application.rb:125:in `loop'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application.rb:125:in `run'
    from /usr/local/bundle/gems/spring-1.3.6/lib/spring/application/boot.rb:18:in `<top (required)>'
    from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from -e:1:in `<main>'                                                                                                                                 

If I insert a gem install bundler in the dockerfile before executing bundle install, I'm in the clear.

But this feels a bit wrong -- I'm not sure if there's a path variable that needs to be set so the system bundler install can then be used.

[joearasin]

Ah never mind -- It was a now-closed issue in Spring 1.6.3. Noting in case anyone runs into this in the future.
https://github.com/rails/spring/blob/master/CHANGELOG.md