[Installer] Load gem plugins when installing

lib/bundler/cli/install.rb

@@ -60,9 +60,6 @@ def run
           "the --binstubs option will be removed in favor of `bundle binstubs`"
       end
 
-      # rubygems plugins sometimes hook into the gem install process
-      Gem.load_env_plugins if Gem.respond_to?(:load_env_plugins)
-
       Plugin.gemfile_install(Bundler.default_gemfile) if Bundler.feature_flag.plugins?
 
       definition = Bundler.definition

lib/bundler/cli/update.rb

@@ -54,9 +54,6 @@ def run
 
       Bundler.settings[:jobs] = opts["jobs"] if opts["jobs"]
 
-      # rubygems plugins sometimes hook into the gem install process
-      Gem.load_env_plugins if Gem.respond_to?(:load_env_plugins)
-
       Bundler.definition.validate_runtime!
       Installer.install Bundler.root, Bundler.definition, opts
       Bundler.load.cache if Bundler.app_cache.exist?

lib/bundler/installer.rb

@@ -159,6 +159,7 @@ def generate_standalone_bundler_executable_stubs(spec)
     # that said, it's a rare situation (other than rake), and parallel
     # installation is SO MUCH FASTER. so we let people opt in.
     def install(options)
+      Bundler.rubygems.load_plugins
       force = options["force"]
       jobs = 1
       jobs = [Bundler.settings[:jobs].to_i - 1, 1].max if can_install_in_parallel?

lib/bundler/rubygems_integration.rb

@@ -194,6 +194,10 @@ def loaded_gem_paths
       end
     end
 
+    def load_plugins
+      Gem.load_plugins
+    end
+
     def ui=(obj)
       Gem::DefaultUserInteraction.ui = obj
     end