Re: Saving/Recalling Shell Commands History?

[Kevin Rodgers <ihs_4664@yahoo.com>]

Peter Dyballa wrote:
> 
> Am 21.08.2006 um 22:17 schrieb Drew Adams:
> 
>>     Although I have set comint-input-ring-file-name, this file never gets
>>     written.
>>
>> Did you set it locally in the shell buffer (mode)? The doc string says 
>> this:
>>
>>  "This variable is buffer-local, and is a good thing to
>>   set in mode hooks."
> 
> No. I found it in a *customise* buffer and set it there first.
> 
>>
>> What is the value of comint-input-ring-file-name in your shell buffer 
>> if you don't ever explicitly set it?
>>
> 
> Now, edited to fit into a system of a handful Emacsen, it is set as:
> 
>     '(comint-input-ring-file-name (concat desktop-dirname "/history"))
> 
> Desktop-dirname is defined in .emacs. In recent GNU Emacs 23 the 
> variable's value is described as:
> 
>     comint-input-ring-file-name is a variable defined in `comint.el'.
>     Its value is "~/.history"
>     Local in buffer *shell*; global value is
>     "~/.emacs.d/PDesktop-23/history"

So you have managed to change its global value, but not the value in
the *shell* buffer.

>     Documentation:
>     *If non-nil, name of the file to read/write input history.
>     See also `comint-read-input-ring' and `comint-write-input-ring'.
>     
>     This variable is buffer-local, and is a good thing to set in mode 
> hooks.
>     
>     You can /customize/ this variable.
> 
> When I comment the comint-input-ring-file-name setting line, its value 
> is simply "~/.history."

So leave it commented out, and put this in your ~/.emacs file:

(add-hook 'shell-mode-hook
           (lambda ()
	    (setq comint-input-ring-file-name ; buffer-local
		  (expand-file-name "history" desktop-dirname))))

> I retrieved the values by pasting comint-input-ring-file-name into 
> *shell* buffer and pressing C-h v.

OK.

-- 
Kevin