[rubygems/rubygems] Remove one fallback to full indexes on big gemfiles

If Gemfile has a lot of dependencies, we have an optimization that uses
the full index in that case, assuming it's going to be faster.

I think this is an old optimization that predates compact index API
times, I believe we no longer need it these days.

Also, since a few releases ago we check for circular dependencies when
resolving by looping through all versions of each name and removing
those that have circular dependencies that would trip up the resolver.

This loop becomes actually very slow when full indexes are used because
to find dependencies of a gemspec, we need to explicitly fetch the
marshaled gemspec (`gemspec.rz` endpoint) for it, so the optimization
has the opposite effect of making things very slow.

https://github.com/rubygems/rubygems/commit/2f46289bd3

1 files changed, 4 insertions, 8 deletions

diff --git a/spec/bundler/install/gems/dependency_api_spec.rb b/spec/bundler/install/gems/dependency_api_spec.rb
index 6cb3d9697d..a54f1db772 100644
--- a/spec/bundler/install/gems/dependency_api_spec.rb
+++ b/spec/bundler/install/gems/dependency_api_spec.rb
@@ -359,7 +359,7 @@ RSpec.describe "gemcutter's dependency API" do
     expect(out).to include("Fetching source index from http://localgemserver.test/extra")
   end
 
-  it "does not fetch every spec if the index of gems is large when doing back deps", :bundler => "< 3" do
+  it "does not fetch every spec when doing back deps", :bundler => "< 3" do
     build_repo2 do
       build_gem "back_deps" do |s|
         s.add_dependency "foo"
@@ -369,9 +369,7 @@ RSpec.describe "gemcutter's dependency API" do
       FileUtils.rm_rf Dir[gem_repo2("gems/foo-*.gem")]
     end
 
-    api_request_limit = low_api_request_limit_for(gem_repo2)
-
-    install_gemfile <<-G, :artifice => "endpoint_extra_missing", :requires => [api_request_limit_hack_file], :env => { "BUNDLER_SPEC_API_REQUEST_LIMIT" => api_request_limit.to_s }.merge(env_for_missing_prerelease_default_gem_activation)
+    install_gemfile <<-G, :artifice => "endpoint_extra_missing", :env => env_for_missing_prerelease_default_gem_activation
       source "#{source_uri}"
       source "#{source_uri}/extra"
       gem "back_deps"
@@ -380,7 +378,7 @@ RSpec.describe "gemcutter's dependency API" do
     expect(the_bundle).to include_gems "back_deps 1.0"
   end
 
-  it "does not fetch every spec if the index of gems is large when doing back deps using blocks" do
+  it "does not fetch every spec when doing back deps using blocks" do
     build_repo2 do
       build_gem "back_deps" do |s|
         s.add_dependency "foo"
@@ -390,9 +388,7 @@ RSpec.describe "gemcutter's dependency API" do
       FileUtils.rm_rf Dir[gem_repo2("gems/foo-*.gem")]
     end
 
-    api_request_limit = low_api_request_limit_for(gem_repo2)
-
-    install_gemfile <<-G, :artifice => "endpoint_extra_missing", :requires => [api_request_limit_hack_file], :env => { "BUNDLER_SPEC_API_REQUEST_LIMIT" => api_request_limit.to_s }.merge(env_for_missing_prerelease_default_gem_activation)
+    install_gemfile <<-G, :artifice => "endpoint_extra_missing", :env => env_for_missing_prerelease_default_gem_activation
       source "#{source_uri}"
       source "#{source_uri}/extra" do
         gem "back_deps"