Previous: Setup for hacking on Goblins, Up: Getting started [Contents][Index]
The traditional way to hack Guile is to use Geiser, both evaluating
from some foo.scm file/buffer with more “permanent” code via,
for example, the C-x C-e / C-x C-b / C-x C-k
commands to evaluate an expression, evaluate a whole buffer, or
compile a buffer’s content; and switching back and forth between that
and the (usually called *Geiser Guile REPL*)
experimental-hacking-and-debugging REPL.
This works with Goblins, but Geiser does some things to temporarily redirect output/error ports when doing the file/buffer oriented evaluation. Unfortunately, this results in Goblins vats potentially breaking due to spawning a separate thread which inherits these temporarily redirected ports, which are then closed when the evaluation succeeds. There is a long-term plan to deal with this, but in the meanwhile, whenever you start a Guile / Geiser hacking session, first execute:
> (use-modules (goblins))
… from the *Geiser Guile REPL*. Otherwise vats may
mysteriously “hang”. This annoyance will be fixed soon!