Prefer `require_relative` for internal requires

Due to the way rubygems monkey-patched require interacts with default
gems, and given that bundler is a default gem, and that bundler
manipulates the LOAD_PATH in very intricated ways, we can reduce the
risk of "leaking" to a different copy of `bundler` by using
`require_relative` for internal requires.

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/bundler/rubygems_integration.rb b/lib/bundler/rubygems_integration.rb
index ca7dd32611..6d93ed6fa1 100644
--- a/lib/bundler/rubygems_integration.rb
+++ b/lib/bundler/rubygems_integration.rb
@@ -111,7 +111,7 @@ module Bundler
     end
 
     def configuration
-      require "bundler/psyched_yaml"
+      require_relative "psyched_yaml"
       Gem.configuration
     rescue Gem::SystemExitException, LoadError => e
       Bundler.ui.error "#{e.class}: #{e.message}"
@@ -261,7 +261,7 @@ module Bundler
 
     def spec_from_gem(path, policy = nil)
       require "rubygems/security"
-      require "bundler/psyched_yaml"
+      require_relative "psyched_yaml"
       gem_from_path(path, security_policies[policy]).spec
     rescue Gem::Package::FormatError
       raise GemspecError, "Could not read gem at #{path}. It may be corrupted."
@@ -686,7 +686,7 @@ module Bundler
 
     def use_gemdeps(gemfile)
       ENV["BUNDLE_GEMFILE"] ||= File.expand_path(gemfile)
-      require "bundler/gemdeps"
+      require_relative "gemdeps"
       runtime = Bundler.setup
       Bundler.ui = nil
       activated_spec_names = runtime.requested_specs.map(&:to_spec).sort_by(&:name)