When using --standalone, place the setup.rb file relative to the gem install path, rather than the working directory

[sodabrew]

For issue #1643 I am running bundler from the root of my project. There are several subdirectories with their own Gemfiles. For each subdirectory, I run:

bundle install --gemfile=path/to/Gemfile --standalone

This installs the gems into path/to/vendor/bundle/ruby.

However the setup.rb file is created at vendor/bundle/bundler/setup.rb, in the project root. I would like this file to be located at path/to/vendor/bundle/bundler/setup.rb. This patch provides the desired behavior. Thanks!

[travisbot]

This pull request fails (merged 18097dc into 42d2c3e).

[sodabrew]

Hi TravisBot! Um?

[indirect]

So Bundler.settings[:path] is actually the install directory, and not the working directory. If you're not seeing that, please open a new issue with a repro case, and I'll see about getting it fixed. Thanks!