[rubygems/rubygems] Fix bundle binstub --path=foo not printing a deprecation warning

Like others, it's a remembered option which we are deprecating in favor
of configuration.

801d5dd943

lib/bundler/cli.rb

@@ -331,6 +331,8 @@ module Bundler
     method_option "all", type: :boolean, banner: "Install binstubs for all gems"
     method_option "all-platforms", type: :boolean, default: false, banner: "Install binstubs for all platforms"
     def binstubs(*gems)
+      remembered_flag_deprecation("path", option_name: "bin")
+
       require_relative "cli/binstubs"
       Binstubs.new(options, gems).run
     end
@@ -743,7 +745,7 @@ module Bundler
       nil
     end
 
-    def remembered_flag_deprecation(name, negative: false)
+    def remembered_flag_deprecation(name, negative: false, option_name: nil)
       option = current_command.options[name]
       flag_name = option.switch_name
       flag_name = "--no-" + flag_name.gsub(/\A--/, "") if negative
@@ -753,7 +755,7 @@ module Bundler
       value = value.join(" ").to_s if option.type == :array
       value = "'#{value}'" unless option.type == :boolean
 
-      print_remembered_flag_deprecation(flag_name, name.tr("-", "_"), value)
+      print_remembered_flag_deprecation(flag_name, option_name || name.tr("-", "_"), value)
     end
 
     def print_remembered_flag_deprecation(flag_name, option_name, option_value)

spec/bundler/other/major_deprecation_spec.rb

@@ -155,6 +155,28 @@ RSpec.describe "major deprecations" do
     pending "fails with a helpful error", bundler: "4"
   end
 
+  context "bundle binstubs --path=" do
+    before do
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "myrack"
+      G
+
+      bundle "binstubs myrack --path=binpath", raise_on_error: false
+    end
+
+    it "should print a deprecation warning" do
+      expect(deprecations).to include(
+        "The `--path` flag is deprecated because it relies on being " \
+        "remembered across bundler invocations, which bundler will no " \
+        "longer do in future versions. Instead please use `bundle config set " \
+        "bin 'binpath'`, and stop using this flag"
+      )
+    end
+
+    pending "fails with a helpful error", bundler: "4"
+  end
+
   context "bundle cache --all" do
     before do
       install_gemfile <<-G