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In eshell I can redirect the output of a command (foo) to a buffer (bar) by inputting:
foo > #<buffer bar>
I want to customize this syntax the following way:
foo > #bar
Is it possible to customize it? How?
Details
emacs version: GNU Emacs 24.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.22.10) of 2017-09-20 on c1bm.rdu2.centos.org
To redirect to a buffer, use #<buffer buffer-name>, since Emacs 24.4, you can also use the shorthand #<buffer-name>. For example,
echo hello >>> #<buffer *scratch*>
echo world >>> #<*scratch*>
It looks like it is possible to customize the syntax via the hook eshell-parse-argument-hook, such as supporting #buffer-name as well. Here is my attempt,
(defun eshell-parse-my-special-reference ()
(when (and (not eshell-current-argument)
(not eshell-current-quoted)
;; Don't overwrite `eshell-parse-special-reference'
(not (looking-at "#<\\(\\(buffer\\|process\\)\\s-\\)?"))
(looking-at "#\\(\\S-+\\)")
(match-string 1))
(goto-char (match-end 0)) ;; Go to the end of the match.
(list 'get-buffer-create (match-string 1))))
(add-hook 'eshell-parse-argument-hook #'eshell-parse-my-special-reference)
and the following worked as expected
echo foobar >>> #*scratch*
ls -lah, the eshell will not recognize the command. It prints the message ls -lah: command not found.
– rph
Jun 20 '18 at 13:05
foo > #<bar>works. You do not need the wordbuffer. Don't know if that is still too much for you. Works for me on cygwin emacs 26.1. – Tobias Jun 19 '18 at 11:44Eshell does not support input redirection. I had a look on the eshell manual and it mentions that this command should work. – rph Jun 19 '18 at 11:47emacs-version). Doesfoo > #<bar>also fail withemacs -Q? – Tobias Jun 19 '18 at 12:58emacs -Q, as well as withemacs --no-window-system. – rph Jun 19 '18 at 14:01foo >>> #<bar>? – Tobias Jun 19 '18 at 14:04