How to delete .*.~undo-tree~ files?

How to delete .*.~undo-tree~ files?

[Denis Bitouzé]

Hi,

I'm able to delete a given .~undo-tree~ file (created by an Emacs
package):

  ┌────
  │ rm -f .foo.\~undo-tree\~
  └────

But I couldn't find a way to delete in one go all of the them in the
current directory (even more so in subdirectories) .

Thanks for any hint.
-- 
Denis

Re: How to delete .*.~undo-tree~ files?

[Marc Chantreux]

hello,

>   ┌────
>   │ rm -f .foo.\~undo-tree\~
>   └────

You can also quote things instead of protecting each chars separately.
I have the feeling it's more readable because of the expectations brains
when you used non-bareword langages for years.

 ┌────
 │ rm -f ".foo.~undo-tree~"
 └────

regards,

-- 
Marc Chantreux
Pôle CESAR (Calcul et services avancés à la recherche)
Université de Strasbourg
14 rue René Descartes,
BP 80010, 67084 STRASBOURG CEDEX
03.68.85.60.79

Re: How to delete .*.~undo-tree~ files?

[Denis Bitouzé]

Le 12/06/24 à 13h30, Marc Chantreux a écrit :

>>   ┌────
>>   │ rm -f .foo.\~undo-tree\~
>>   └────
>
> You can also quote things instead of protecting each chars separately.
> I have the feeling it's more readable because of the expectations
> brains when you used non-bareword langages for years.
>
>  ┌────
>  │ rm -f ".foo.~undo-tree~"
>  └────

Indeed, thanks!

Anyway:

  ┌────
  │ rm -f ".*.~undo-tree~" 
  └────

doesn't remove in mass all the .*.~undo-tree~ in my current directory.

Regards.
-- 
Denis

Re: How to delete .*.~undo-tree~ files?

[Andreas Kähäri]

On Wed, Jun 12, 2024 at 02:20:27PM +0200, Denis Bitouzé wrote:
> Le 12/06/24 à 13h30, Marc Chantreux a écrit :
> 
> >>   ┌────
> >>   │ rm -f .foo.\~undo-tree\~
> >>   └────
> >
> > You can also quote things instead of protecting each chars separately.
> > I have the feeling it's more readable because of the expectations
> > brains when you used non-bareword langages for years.
> >
> >  ┌────
> >  │ rm -f ".foo.~undo-tree~"
> >  └────
> 
> Indeed, thanks!
> 
> Anyway:
> 
>   ┌────
>   │ rm -f ".*.~undo-tree~" 
>   └────
> 
> doesn't remove in mass all the .*.~undo-tree~ in my current directory.
> 
> Regards.
> -- 
> Denis

... because a quoted * does not glob anything.

	rm -f .*.'~undo-tree~'

-- 
Andreas (Kusalananda) Kähäri
Uppsala, Sweden

.

Re: How to delete .*.~undo-tree~ files?

[Denis Bitouzé]

Le 12/06/24 à 14h25, Andreas Kähäri a écrit :

> ... because a quoted * does not glob anything.
>
> 	rm -f .*.'~undo-tree~'

That did the trick, thanks!
-- 
Denis

Re: How to delete .*.~undo-tree~ files?

[Mark J. Reed]

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The usual trick works - just replace the "foo" with an asterisk while
leaving the rest alone, including the backslashes:

rm -f .*.\~undo-tree\~


As Andreas said, you can also write it like like this:

rm -f .*.'~undo-tree~'


Which ties back into those expectations from other languages that Marc
mentioned. It's important to remember that, unlike in those languages,
quotation marks are not token delimiters in the shell. They don't terminate
the current shell *word* (what other languages would just call a "string");
you can go in and out of quotes, switch kinds of quotes, etc. as often as
you like within a single word.

So .*.'~undo-tree~' is still just one string, even though only part of it
is in quotation marks.  The part in quotes is not subject to glob
expansion; the part not in quotes is.

FWIW, if you want to do the same thing but recursing into subdirectories,
you can use the special recursive glob sequence * ***, as in
 **/.*.'~undo-tree~'

On Wed, Jun 12, 2024 at 9:06 AM Denis Bitouzé <dbitouze@wanadoo.fr> wrote:

> Le 12/06/24 à 14h25, Andreas Kähäri a écrit :
>
> > ... because a quoted * does not glob anything.
> >
> >       rm -f .*.'~undo-tree~'
>
> That did the trick, thanks!
> --
> Denis
>
>

-- 
Mark J. Reed <markjreed@gmail.com>

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Re: How to delete .*.~undo-tree~ files?

[Ray Andrews]

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On 2024-06-12 10:46, Mark J. Reed wrote:
>
> Which ties back into those expectations from other languages that Marc 
> mentioned. It's important to remember that, unlike in those languages, 
> quotation marks are not token delimiters in the shell. They don't 
> terminate the current shell /word/ (what other languages would just 
> call a "string"); you can go in and out of quotes, switch kinds of 
> quotes, etc. as often as you like within a single word.
>
> So .*.'~undo-tree~' is still just one string, even though only part of 
> it is in quotation marks.  The part in quotes is not subject to glob 
> expansion; the part not in quotes is.

Pure curiosity, I have no problem to solve, but supposing you did want 
to break the string up, I suppose you'd have to use an array? Then 
perhaps manipulate the elements/words as desired, then recombine?

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Re: How to delete .*.~undo-tree~ files?

[Bart Schaefer]

On Wed, Jun 12, 2024 at 11:28 AM Ray Andrews <rayandrews@eastlink.ca> wrote:
>
>> On 2024-06-12 10:46, Mark J. Reed wrote:
>>
>> So .*.'~undo-tree~' is still just one string, even though only part of it is in quotation marks.  The part in quotes is not subject to glob expansion; the part not in quotes is.
>
> Pure curiosity, I have no problem to solve, but supposing you did want to break the string up, I suppose you'd have to use an array?  Then perhaps manipulate the elements/words as desired, then recombine?

I'm unclear what you mean by "break the string up".

Placing strings (quoted or not) adjacent to one another in shell is a
straight concatenation, just like separating strings with dot in perl
or plus in Javascript.  Once they're concatenated any quoting is gone
and you just have a single string with no particular rules for how to
break it up again.  You can't recover the original pieces.

So the only way to "break the string up" is never to put it together
in the first place.  Using an array would be one way to do that, but
not necessarily the best way depending on where/how the substrings
originate.

Re: How to delete .*.~undo-tree~ files?

[Ray Andrews]

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On 2024-06-12 11:48, Bart Schaefer wrote:
> So the only way to "break the string up" is never to put it together
> in the first place.  Using an array would be one way to do that, but
> not necessarily the best way depending on where/how the substrings
> originate.
Yeah, that has to be the answer.  If I want to break up "Let me not, 'to 
the m'"arriage of" true minds" into:
Le
te me n
ot, to th
e marriage
  of true minds

... the parts would have to exist separately before concatenation cuz 
once together there's no paper trail back to where the parts came from.  
It's actually a dumb question even tho it's worth asking -- my array 
would have to pre-exist in which case the elements would indeed be 
delimited from each other.  But you can't unscramble the egg.





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Re: How to delete .*.~undo-tree~ files?

[Marc Chantreux]

On Wed, Jun 12, 2024 at 02:25:52PM +0200, Andreas Kähäri wrote:
> > doesn't remove in mass all the .*.~undo-tree~ in my current directory.

to be more obvious:

those are equivalent:

	echo ".*.~undo-tree~"
	echo \.\*\.\~\u\n\d\o\-\t\r\e\e\~

regards

-- 
Marc Chantreux
Pôle CESAR (Calcul et services avancés à la recherche)
Université de Strasbourg
14 rue René Descartes,
BP 80010, 67084 STRASBOURG CEDEX
03.68.85.60.79