Subject: bug#3343 closed by Chong Yidong <[email-masked]> (23.0.93; Setting grep-command etc has no effect)

From: [email-masked] (Emacs bug Tracking System)
Date: Sat, 23 May 2009 00:25:07 +0000

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#3343: 23.0.93; Setting grep-command etc has no effect

It has been closed by Chong Yidong <[email-masked]>.

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better one in a separate message then please contact Chong Yidong <[email-masked]> by
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3343: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3343
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Subject: 23.0.93; Setting grep-command etc has no effect
From: Chong Yidong <[email-masked]>
To: [email-masked] (Johan Bockgård)
Cc: [email-masked]
Date: Fri, 22 May 2009 20:19:43 -0400

> emacs -Q
> M-x set-variable RET grep-command RET "ls" RET
> M-x grep RET RET
> M-x set-variable RET grep-command RET "ll" RET
> M-x grep RET   => The old command is still used.
>
> This used to work in Emacs 22.

This is due to the introduction of grep-compute-defaults and
grep-host-defaults-alist, which is supposed to offer "smarter" defaults
for these variables when you call grep on remote files.  Unfortunately,
this means that if you simply change these variables, those changes get
overwritten during the next interactive call to grep.

We should probably revisit the design of this code after the release.

In the meantime, I've made a change so that if you change these
variables via the Customize interface, the new values will take effect
correctly.

Subject: 23.0.93; Setting grep-command etc has no effect
From: [email-masked] (Johan Bockgård)
To: [email-masked]
Date: Thu, 21 May 2009 16:14:47 +0200

The problem is that grep-compute-defaults overwrites `grep-command',
`grep-find-command' et al.

emacs -Q
M-x set-variable RET grep-command RET "ls" RET
M-x grep RET RET
M-x set-variable RET grep-command RET "ll" RET
M-x grep RET   => The old command is still used.

This used to work in Emacs 22.