https://git.ruby-lang.org/ruby.git/commit/?id=9dc76e102e

From 9dc76e102ec00bb93b7aafaaa1309ca426d02595 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@r...>
Date: Fri, 5 Nov 2021 13:55:09 +0100
Subject: [rubygems/rubygems] Don't write outside of destdir when installing
 default bundler

https://github.com/rubygems/rubygems/commit/a62d00c5e8
---
 lib/rubygems/commands/setup_command.rb           | 1 +
 test/rubygems/test_gem_commands_setup_command.rb | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/lib/rubygems/commands/setup_command.rb b/lib/rubygems/commands/setup_command.rb
index 9326496fe61..adceb62dce3 100644
--- a/lib/rubygems/commands/setup_command.rb
+++ b/lib/rubygems/commands/setup_command.rb
@@ -418,6 +418,7 @@ By default, this RubyGems will install gem as: https://github.com/ruby/ruby/blob/trunk/lib/rubygems/commands/setup_command.rb#L418
           force: options[:force],
           install_as_default: true,
           bin_dir: bin_dir,
+          install_dir: default_dir,
           wrappers: true
         ).install
       ensure
diff --git a/test/rubygems/test_gem_commands_setup_command.rb b/test/rubygems/test_gem_commands_setup_command.rb
index 50f99bc4198..08f94d52bfb 100644
--- a/test/rubygems/test_gem_commands_setup_command.rb
+++ b/test/rubygems/test_gem_commands_setup_command.rb
@@ -245,6 +245,8 @@ class TestGemCommandsSetupCommand < Gem::TestCase https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_commands_setup_command.rb#L245
   def test_install_default_bundler_gem_with_destdir_flag
     @cmd.extend FileUtils
 
+    FileUtils.chmod "-w", @gemhome
+
     destdir = File.join(@tempdir, 'foo')
     bin_dir = File.join(destdir, 'bin')
 
-- 
cgit v1.2.1


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