Merge bundler to standard libraries.

  rubygems 2.7.x depends bundler-1.15.x. This is preparation for
  rubygems and bundler migration.

  * lib/bundler.rb, lib/bundler/*: files of bundler-1.15.4
  * spec/bundler/*: rspec examples of bundler-1.15.4. I applied patches.
    * https://github.com/bundler/bundler/pull/6007
    * Exclude not working examples on ruby repository.
    * Fake ruby interpriter instead of installed ruby.
  * Makefile.in: Added test task named `test-bundler`. This task is only
    working macOS/linux yet. I'm going to support Windows environment later.
  * tool/sync_default_gems.rb: Added sync task for bundler.

  [Feature #12733][ruby-core:77172]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 28 insertions, 0 deletions

diff --git a/spec/bundler/plugins/hook_spec.rb b/spec/bundler/plugins/hook_spec.rb
new file mode 100644
index 0000000000..9850d850ac
--- /dev/null
+++ b/spec/bundler/plugins/hook_spec.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe "hook plugins" do
+  before do
+    build_repo2 do
+      build_plugin "before-install-plugin" do |s|
+        s.write "plugins.rb", <<-RUBY
+          Bundler::Plugin::API.hook "before-install-all" do |deps|
+            puts "gems to be installed \#{deps.map(&:name).join(", ")}"
+          end
+        RUBY
+      end
+    end
+
+    bundle "plugin install before-install-plugin --source file://#{gem_repo2}"
+  end
+
+  it "runs after a rubygem is installed" do
+    install_gemfile <<-G
+      source "file://#{gem_repo1}"
+      gem "rake"
+      gem "rack"
+    G
+
+    expect(out).to include "gems to be installed rake, rack"
+  end
+end