Auto merge of #3556 - bundler:seg-new-index-fetchers, r=segiddins

[Fetcher] Add Fetchers for the new index format!

Things that need to be tested:

- [x] CompactGemList sources
- [x] mixed compact and full index sources
- [x] mixed compact and api sources
- [x] mixed compact, full, and api sources
- [x] fallback from compact to api
- [x] fallback from compact to full

Things that need to be finished to ship this:

 - [x] install gems via compact index
 - [x] stop requesting /api/v1/dependencies if compact index request succeeds
 - [x] stop printing "Need to query more than 500 gems. Downloading full index instead..."
 - [x] stop printing "Fetching source index from https://bundler-api-staging.herokuapp.com/"
 - [ ] print useful info message, proposed:
    - [x] print "Fetching gem information from <server>..." before requesting `/versions`
    - [ ] print "." for each additional `/info/<gem>` request
 - [x] accept full files gzipped
 - [x] request and accept ranges using un-gzipped offsets
 - [ ] make sure this client works against fastly-cached text files
 - [x] share cache between mirrors and original source
 - [x] Add username to cache path

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/realworld/gemfile_source_header_spec.rb b/spec/realworld/gemfile_source_header_spec.rb
index 70039fa640..6c2c05eaa7 100644
--- a/spec/realworld/gemfile_source_header_spec.rb
+++ b/spec/realworld/gemfile_source_header_spec.rb
@@ -1,7 +1,7 @@
 require "spec_helper"
 require "thread"
 
-describe "fetching dependencies with a mirrored source", :rubygems => ">= 2.0" do
+describe "fetching dependencies with a mirrored source", :realworld => true, :rubygems => ">= 2.0" do
   let(:mirror) { "https://server.example.org" }
   let(:original) { "http://127.0.0.1:#{@port}" }