Issue originally made by @tleunen

Bug information

• Babel version: 6.13.2
• Node version: 6.3.0

Description

I have a specific plugin case in which knowing the path of the babelrc configuration file would be helpful. So having that information inside the state in the plugin would be great, because sometimes, .babelrc is not at the root of the project (working directory).

I've tried to see inside state.file.opts if the info was already there but it doesn't seem to be the case.