Adding configuration to Bundler plugin

[okuramasafumi]

Hi all,

I'm creating a Bundler plugin reading the documentation.
https://github.com/okuramasafumi/bundler-ctags_generator
I already built a basic functionality but I'd also like to add configuration to the plugin.
How can I achieve that? The obvious way is to use environment variables but I'd rather want to avoid it.
Maybe the best is to use files like gemrc?

gemrc is not a Ruby file, so maybe we need bundlerc?