s2i run script question

I am using s2i to create a source image which will contain an artifact needed when building another image. My question is does the 'run' script included in the s2i build ever get executed? I am not deploying the source image directly, and my understanding is the 'run' script would only execute upon deployment.

also, am I correct in thinking that, upon deployment, the 'run' script precedes the docker-entrypoint script (but does not replace it)?

thanks