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From: Mathias Dahl <mathias.dahl@gmail.com>
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Subject: Re: Need help with eshell hack
Date: Fri, 21 Dec 2007 00:32:24 +0100
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Mathias Dahl <mathias.dahl@gmail.com> writes:

> It almost works. The problem is that when output from the command
> reaches the bottom of the visible part of the eshell window, the
> window isn't scrolled down to show the output.

I let go of the `save-excursion' + `set-buffer' approach, in other words
being a bad boy, and got this that seems to work for me:

(defun my-eshell-execute-current-line ()
  "Insert text of current line in eshell and execute."
  (interactive)
  (let ((command (buffer-substring
                  (save-excursion
                    (beginning-of-line)
                    (point))
                  (save-excursion
                    (end-of-line)
                    (point)))))
    (let ((buf (current-buffer)))
      (unless (get-buffer eshell-buffer-name)
        (eshell))
      (display-buffer eshell-buffer-name t)
      (switch-to-buffer-other-window eshell-buffer-name)
      (end-of-buffer)
      (eshell-kill-input)
      (insert command)
      (eshell-send-input)
      (end-of-buffer)
      (switch-to-buffer-other-window buf))))

It annoys be however that I could not get it working without using
switch-to-buffer... The docstring says to avoid use it.

Oh well,

/Mathias