Marc Prud'hommeaux has directed me towards his wonderful wrapper for streams, called jline, that allows grash to provide line editing and command history.

I have released a new version (grash 0.0.0.5) which now includes this facility by default, both from the command line (java -jar grash.jar) and when embedded. If you have any security issues with this amendment when embedding grash, I have provided a new constructor that allows you to turn this facility off. Marc has very kindly relicensed jline as BSD, so grash is still fully available under an Apache2.0/BSD style license.

On Unix and MacOSX you can simply use the arrow keys to navigate round your most recent commands (on Windows you will have to use CTRL-N/CTRL-P due to an issue in jline). The commands you type are persisted (beyond the session) currently in your home directory in a file cunningly called "~/.grash_history".

I'm quite excited that jline also provides the potential for command line completion (a.k.a. tab completion), this would be a splendid addition which I must look into.

This new release also fixes an issue found by Dave Minter, thanks for the feedback Dave, hopefully you will find things a bit more bulletproof now.

Please keep your thoughts and ideas rolling in, cheers.