Re: Read-only warning message

[Perry Smith <pedzsan@gmail.com>]

On May 17, 2011, at 1:30 PM, Memnon Anon wrote:

> sdn.gnuem@mailnull.com writes:
> 
>> Hello emacs folks, 
>> 
>> This is not a desperate call for urgent help or
>> anything -- this is just something that has bugged me for some time.
>> 
>>    When you make a buffer read-only (via C-x C-q toggle-read-only),
>> and the file in the buffer is under version control, you get a
>> warning message: "File is under version-control; use C-x v v to
>> check in/out".
>> 
>>    Anyone have any idea why? What earthly relevance could the file's
>> being under version-control have to my toggling the buffer's
>> read-only state?
> 
> ,----
> | commit c97bded566032831e282666899ff847ba58c69a2
> | Author: André Spiegel <spiegel@gnu.org>
> | Date:   Tue Jul 16 17:40:37 2002 +0000
> | 
> |     Bind toggle-read-only to C-x C-q.
> |     (toggle-read-only): Display a warning message if the file is under
> |     version control.
> `----
> 
> This message has been there for 9 years; pitty there is no hint in
> there.
> 
> But I just checked: Using view mode displays no warning. 
> If the warning bothers you, you may want to consider using it instead.

I may be daft but I believe I recall that long ago, that is how you checked files in and out.  If the file was not checked out and you edited it, it would be read-only.  And to toggle that, you could do ^X-^Q and that would trigger emacs into checking out the file.  Thus, the warning when that procedure changed to alert people that things have changed.

pedz