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bug#5618: 23.1.91; shell-command-on-region unexpectedly erases buffer
From: |
Lars Ingebrigtsen |
Subject: |
bug#5618: 23.1.91; shell-command-on-region unexpectedly erases buffer |
Date: |
Thu, 27 Jan 2022 19:31:08 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
tomas@tuxteam.de writes:
> - Start with some buffer with text in it. *scratch* will do fine.
> - Put point somewhere in text
> - evaluate (shell-command-on-region (point) (point) "/bin/date"
> (current-buffer) nil)
>
> (The actual values of START and END are irrelevant, though).
>
> The whole content of the buffer gets replaced by output of
> command. According to the doc, I'd expect the ouput to be inserted
> before point.
(I'm going through old bug reports that unfortunately weren't resolved
at the time.)
The behaviour has now been documented as such:
----
Optional fourth arg OUTPUT-BUFFER specifies where to put the
command's output. If the value is a buffer or buffer name,
erase that buffer and insert the output there; a non-nil value of
`shell-command-dont-erase-buffer' prevent to erase the buffer.
If the value is nil, use the buffer specified by `shell-command-buffer-name'.
Any other non-nil value means to insert the output in the
current buffer after START.
----
And we've grown an extra user option (that's... pretty confusing in
itself, I think). So while the semantics here are far less than ideal,
I don't think there's anything further to do here, and I'm closing this
bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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- bug#5618: 23.1.91; shell-command-on-region unexpectedly erases buffer,
Lars Ingebrigtsen <=