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, 36 insertions, 0 deletions

diff --git a/spec/bundler/support/the_bundle.rb b/spec/bundler/support/the_bundle.rb
new file mode 100644
index 0000000000..742d393425
--- /dev/null
+++ b/spec/bundler/support/the_bundle.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+require "support/helpers"
+require "support/path"
+
+module Spec
+  class TheBundle
+    include Spec::Helpers
+    include Spec::Path
+
+    attr_accessor :bundle_dir
+
+    def initialize(opts = {})
+      opts = opts.dup
+      @bundle_dir = Pathname.new(opts.delete(:bundle_dir) { bundled_app })
+      raise "Too many options! #{opts}" unless opts.empty?
+    end
+
+    def to_s
+      "the bundle"
+    end
+    alias_method :inspect, :to_s
+
+    def locked?
+      lockfile.file?
+    end
+
+    def lockfile
+      bundle_dir.join("Gemfile.lock")
+    end
+
+    def locked_gems
+      raise "Cannot read lockfile if it doesn't exist" unless locked?
+      Bundler::LockfileParser.new(lockfile.read)
+    end
+  end
+end