Using teedy with read-only data

Hello, 

Is it possible to use teedy with a read-only mounted data directory? 
From the docs it looks like you can use the docs-importer to watch over a directory but then it tries to either delete or copy the file somewhere else. 

I have a large collection of data I am trying to index and cannot support duplicating it or touching the files.

Is there a way for this?

Thank you