Check $VISUAL before $EDITOR
Currently GHCi checks the
$EDITOR environment variable to set the editor which is launched by
:edit. There is another environment variable
$VISUAL which is also used for selecting the default editor on Unix. I use both, but as is suggested in this post on StackExchange, I set
vi. Thus GHCi always launches
ex instead of the desired
I suggest simply checking the
$VISUAL variable first, and only if it is unset then using
$EDITOR. Other command-line tools do this, for example Git.
The change would have to be made here I think. I don't know enough about monads or
IO to do this myself though.