How can I tell if a buffer is a comint buffer, eshell buffer or neither?

Question

I have Emacs Lisp program that I want to work inside either a comint process buffer or an eshell buffer. The code I currently am using is:

but this is a bit ugly and might be prone to breakage if either the comint or eshell changes.

Any suggestions?

PythonNut · Accepted Answer · 2015-03-31 04:36:03Z

4

You can test the current major-mode by querying the major-mode variable.

(if (eq major-mode 'eshell-mode) ...)
(if (eq major-mode 'comint-mode) ...)

If you would like to test a mode, and all of it's child modes, try this instead:

(if (derived-mode-p 'eshell-mode) ...)
(if (derived-mode-p 'comint-mode) ...)

answered Mar 29, 2015 at 23:54

PythonNut

10.5k3 gold badges31 silver badges79 bronze badges

This is simple and works. Why didn't I think of it? But things are a little more complicated. shell-mode has a parent mode of comint-mode. I could add a test for that as well, but it would be great to handle the general parent-mode case. (If other/better suggestions for handling derived-from-parent-modes, I'll accept this in a day.)
– rocky
Commented Mar 31, 2015 at 1:56
@rocky try this then. :)
– PythonNut
Commented Mar 31, 2015 at 4:36
I should have mentioned that I had already did: github.com/rocky/emacs-dbgr/commit/…
– rocky
Commented Mar 31, 2015 at 7:11

Add a comment |

1 Answer 1