That just copies the data, its doesn't do imports or initial fetching of data - which running the application in and IDE does for me.
Having an IDE setup is pretty essential to my job, so I am going to need that for debugging certain errors anyway. Once that is setup, I rarely see the need to start scripting things for a REPL as a debugger feels far more useful to me.
Can't you just run those scripts as the first thing in your REPL session?