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, 47 insertions, 0 deletions

diff --git a/spec/bundler/support/hax.rb b/spec/bundler/support/hax.rb
new file mode 100644
index 0000000000..663d3527c5
--- /dev/null
+++ b/spec/bundler/support/hax.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+require "rubygems"
+
+module Gem
+  class Platform
+    @local = new(ENV["BUNDLER_SPEC_PLATFORM"]) if ENV["BUNDLER_SPEC_PLATFORM"]
+  end
+  @platforms = [Gem::Platform::RUBY, Gem::Platform.local]
+end
+
+if ENV["BUNDLER_SPEC_VERSION"]
+  module Bundler
+    remove_const(:VERSION) if const_defined?(:VERSION)
+    VERSION = ENV["BUNDLER_SPEC_VERSION"].dup
+  end
+end
+
+if ENV["BUNDLER_SPEC_WINDOWS"] == "true"
+  require "bundler/constants"
+
+  module Bundler
+    remove_const :WINDOWS if defined?(WINDOWS)
+    WINDOWS = true
+  end
+end
+
+class Object
+  if ENV["BUNDLER_SPEC_RUBY_ENGINE"]
+    if defined?(RUBY_ENGINE) && RUBY_ENGINE != "jruby" && ENV["BUNDLER_SPEC_RUBY_ENGINE"] == "jruby"
+      begin
+        # this has to be done up front because psych will try to load a .jar
+        # if it thinks its on jruby
+        require "psych"
+      rescue LoadError
+        nil
+      end
+    end
+
+    remove_const :RUBY_ENGINE if defined?(RUBY_ENGINE)
+    RUBY_ENGINE = ENV["BUNDLER_SPEC_RUBY_ENGINE"]
+
+    if RUBY_ENGINE == "jruby"
+      remove_const :JRUBY_VERSION if defined?(JRUBY_VERSION)
+      JRUBY_VERSION = ENV["BUNDLER_SPEC_RUBY_ENGINE_VERSION"]
+    end
+  end
+end