How to programmatically save a buffer?

How to programmatically save a buffer?

[Marcin Borkowski]

Hi there,

as part of a function of mine, I want to save a buffer.  However, I do
not want any messages logged (as save-buffer does).  I found this in the
manual:

--8<---------------cut here---------------start------------->8---
You can write the contents of a buffer, or part of a buffer, directly to
a file on disk using the ‘append-to-file’ and ‘write-region’ functions.
Don’t use these functions to write to files that are being visited; that
could cause confusion in the mechanisms for visiting.
--8<---------------cut here---------------end--------------->8---

Why shouldn't I use `write-region'?

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Re: How to programmatically save a buffer?

[Jorge A. Alfaro-Murillo]

Hi Marcin,

Marcin Borkowski writes:

> as part of a function of mine, I want to save a buffer. 
> However, I do not want any messages logged (as save-buffer 
> does). 

If you do something like:

#+BEGIN_SRC emacs-lisp
  (let (message-log-max)
       ...
       (save-buffer)
       ...
       ) 
#+END_SRC

then message-log-max is nil while save-buffer is executed and so 
it doesn't log the message.

-- 
Jorge.

Re: How to programmatically save a buffer?

[Marcin Borkowski]

On 2015-11-17, at 23:21, Jorge A. Alfaro-Murillo <jorge.alfaro-murillo@yale.edu> wrote:

> Hi Marcin,
>
> Marcin Borkowski writes:
>
>> as part of a function of mine, I want to save a buffer. 
>> However, I do not want any messages logged (as save-buffer 
>> does). 
>
> If you do something like:
>
> #+BEGIN_SRC emacs-lisp
>   (let (message-log-max)
>        ...
>        (save-buffer)
>        ...
>        ) 
> #+END_SRC
>
> then message-log-max is nil while save-buffer is executed and so 
> it doesn't log the message.

Thanks, that's /almost/ it - but it still shows the message in the echo
area...  How to avoid that?

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University

Re: How to programmatically save a buffer?

[Jorge A. Alfaro-Murillo]

Marcin Borkowski writes:

> Jorge A. Alfaro-Murillo writes: 
> 
>> Marcin Borkowski writes: 
>> 
>>> as part of a function of mine, I want to save a buffer. 
>>> However, I do not want any messages logged (as save-buffer 
>>> does).  
>> 
>> If you do something like: 
>> 
>> #+BEGIN_SRC emacs-lisp 
>>   (let (message-log-max) 
>>        ...  (save-buffer) ...  )  
>> #+END_SRC 
>> 
>> then message-log-max is nil while save-buffer is executed and 
>> so  it doesn't log the message. 
> 
> Thanks, that's /almost/ it - but it still shows the message in 
> the echo area...  How to avoid that?

#+BEGIN_SRC emacs-lisp
  (let ((inhibit-message t)
        message-log-max)
       ...
       (save-buffer)
       ...
  ) 
#+END_SRC

Best,
-- 
Jorge.

Re: How to programmatically save a buffer?

[Pascal J. Bourguignon]

Marcin Borkowski <mbork@mbork.pl> writes:

> Hi there,
>
> as part of a function of mine, I want to save a buffer.  However, I do
> not want any messages logged (as save-buffer does).  I found this in the
> manual:
>
> You can write the contents of a buffer, or part of a buffer, directly to
> a file on disk using the ‘append-to-file’ and ‘write-region’ functions.
> Don’t use these functions to write to files that are being visited; that
> could cause confusion in the mechanisms for visiting.
>
> Why shouldn't I use `write-region'?

Because find-file doesn't necessarily put the file contents in the
buffer, but some "formatted" or "extracted" version of if.

You may try basic-save-buffer
which writes a message only if no save was needed.

-- 
__Pascal Bourguignon__                 http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk