From 836d9fe46b85dd28339d2dae891df2da153c8632 Mon Sep 17 00:00:00 2001
From: Cody Cutrer <cody@instructure.com>
Date: Fri, 15 Sep 2023 09:32:30 -0600
Subject: [PATCH] [rubygems/rubygems] Add Bundler::Plugin.loaded? helper

Useful if your plugin introduces new methods to the DSL, so that
Gemfiles can easily abort if the plugin hasn't loaded yet

https://github.com/rubygems/rubygems/commit/b733055c6e
---
 lib/bundler/plugin.rb | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/bundler/plugin.rb b/lib/bundler/plugin.rb
index edd1900135..fbbb5950f7 100644
--- a/lib/bundler/plugin.rb
+++ b/lib/bundler/plugin.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require "set"
+
 require_relative "plugin/api"
 
 module Bundler
@@ -25,7 +27,7 @@ module Bundler
       @sources = {}
       @commands = {}
       @hooks_by_event = Hash.new {|h, k| h[k] = [] }
-      @loaded_plugin_names = []
+      @loaded_plugin_names = Set.new
     end
 
     reset!
@@ -228,7 +230,7 @@ module Bundler
       plugins = index.hook_plugins(event)
       return unless plugins.any?
 
-      (plugins - @loaded_plugin_names).each {|name| load_plugin(name) }
+      plugins.each {|name| load_plugin(name) }
 
       @hooks_by_event[event].each {|blk| blk.call(*args, &arg_blk) }
     end
@@ -240,6 +242,11 @@ module Bundler
       Index.new.installed?(plugin)
     end
 
+    # @return [true, false] whether the plugin is loaded
+    def loaded?(plugin)
+      @loaded_plugin_names.include?(plugin)
+    end
+
     # Post installation processing and registering with index
     #
     # @param [Array<String>] plugins list to be installed
@@ -330,6 +337,7 @@ module Bundler
     # @param [String] name of the plugin
     def load_plugin(name)
       return unless name && !name.empty?
+      return if loaded?(name)
 
       # Need to ensure before this that plugin root where the rest of gems
       # are installed to be on load path to support plugin deps. Currently not