Add diagnostic output for Ruby 4.0 CI bundler debugging #10

	name: CI

	on:
	push:
	branches: [master, 'fix/', 'feature/']
	pull_request:
	branches: [master]

	jobs:
	test:
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	ruby-version: ['3.2', '3.3', '3.4', '4.0']

	name: Ruby ${{ matrix.ruby-version }}

	steps:
	- uses: actions/checkout@v4

	- name: Set up Ruby ${{ matrix.ruby-version }}
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true

	- name: Debug bundler env
	run: \|
	echo "=== Ruby & Bundler ==="
	ruby -v
	bundle -v
	echo "=== Key env vars ==="
	echo "GEM_HOME=$GEM_HOME"
	echo "GEM_PATH=$GEM_PATH"
	echo "BUNDLE_PATH=$BUNDLE_PATH"
	echo "BUNDLE_APP_CONFIG=$BUNDLE_APP_CONFIG"
	echo "BUNDLE_GEMFILE=$BUNDLE_GEMFILE"
	echo "=== Bundle config ==="
	bundle config list
	echo "=== Gem paths ==="
	ruby -e 'puts "Gem.dir=#{Gem.dir}"; puts "Gem.default_dir=#{Gem.default_dir}"; puts "Gem.user_dir=#{Gem.user_dir}"; puts "Gem.path=#{Gem.path}"'
	echo "=== Inside bundle exec ==="
	bundle exec ruby -e 'require "open3"; out,_=Open3.capture2e("ruby","-e","require %q(bundler); Bundler.with_original_env { puts %Q(orig GEM_HOME=\#{ENV[%q(GEM_HOME)]}) }; Bundler.with_unbundled_env { puts %Q(unbundled GEM_HOME=\#{ENV[%q(GEM_HOME)]}) }; puts %Q(Gem.default_dir=\#{Gem.default_dir})"); puts out'

	- name: Run tests
	run: bundle exec rspec

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