I'm trying to start using eshell in place of bash within emacs, but I rely heavily on bash functions that I have written over the years. I'd like to configure eshell to invoke bash whenever a "command not found" condition occurs, in case the command in question is implemented as a bash function.
There is a variable tantalizingly named eshell-alternate-command-hook that sounds like it is made to order, but my lack of elisp skill is interfering with my success I think.
This is my best effort:
(add-hook 'eshell-alternate-command-hook 'invoke-bash t t)
(defun invoke-bash (command args)
(throw 'eshell-replace-command
(list "bash -c" command args)))
But when I test it, it doesn't work:
c:/temp $ lsd
Wrong number of arguments: (lambda (command args) (throw (quote eshell-replace-command) (list "bash -c" command args))), 1
c:/temp $
This is what I eventually came up with:
(defun invoke-bash (command)
(progn
(setq invoke-bash-cmd (concat "bash -c \"" command " " (mapconcat 'identity eshell-last-arguments " ") "\""))
(message invoke-bash-cmd)
(throw 'eshell-replace-command
(eshell-parse-command invoke-bash-cmd))))