How to delete hidden .swap files (.sw?) if there are no changes?

[L. A. Walsh]

I have near a dozen files where I have both a ".cc and a .h"
open but had a desktop reboot, so all have swap files now.
Just now, I opened them all and found that only 1
pair had any changes that needed to be addressed, but the
others were all 'unmodified'.


Is there a way to have vim automatically delete the swap
files for which there are no changes and no running process?

Alternative, is there a way to tell in a shell that
some correspond to unmodified files so I could pre-delete
them in restarting gvim for all the files?

I don't want to blindly try to recover them, as any that
do have actual changes, I want to know about so I
can write them to /tmp and compare them w/the origs to
see if what the changes are and if they should be kept
(usually should, but occasionally not).

Thanks in advance!
-linda





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[Tony Mechelynck]

On Sun, Mar 12, 2017 at 1:41 AM, L A Walsh <[hidden email]> wrote:

> I have near a dozen files where I have both a ".cc and a .h"
> open but had a desktop reboot, so all have swap files now.
> Just now, I opened them all and found that only 1
> pair had any changes that needed to be addressed, but the
> others were all 'unmodified'.
>
>
> Is there a way to have vim automatically delete the swap
> files for which there are no changes and no running process?
>
> Alternative, is there a way to tell in a shell that
> some correspond to unmodified files so I could pre-delete
> them in restarting gvim for all the files?
>
> I don't want to blindly try to recover them, as any that
> do have actual changes, I want to know about so I
> can write them to /tmp and compare them w/the origs to
> see if what the changes are and if they should be kept
> (usually should, but occasionally not).
>
> Thanks in advance!
> -linda

You could try creating an autocomand for the |SwapExists| event. Set
|v:swapchoice| to one of the values mentioned in the help for that
event, or to the empty string to ask the user.

Best regards,
Tony.

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[L. A. Walsh]

Tony Mechelynck wrote:

> On Sun, Mar 12, 2017 at 1:41 AM, L A Walsh <[hidden email]> wrote:
>  
>> I have near a dozen files where I have both a ".cc and a .h"
>> open but had a desktop reboot, so all have swap files now.
>> Just now, I opened them all and found that only 1
>> pair had any changes that needed to be addressed, but the
>> others were all 'unmodified'.
>>
>>
>> Is there a way to have vim automatically delete the swap
>> files for which there are no changes and no running process?
>>
>> Alternative, is there a way to tell in a shell that
>> some correspond to unmodified files so I could pre-delete
>> them in restarting gvim for all the files?
>>
>> I don't want to blindly try to recover them, as any that
>> do have actual changes, I want to know about so I
>> can write them to /tmp and compare them w/the origs to
>> see if what the changes are and if they should be kept
>> (usually should, but occasionally not).
>>
>> Thanks in advance!
>> -linda
>>    
>
> You could try creating an autocomand for the |SwapExists| event. Set
> |v:swapchoice| to one of the values mentioned in the help for that
> event, or to the empty string to ask the user.
>  

----
    Thanks Tony, but that doesn't sound very "automatic"... ;-/.
On top of that, say I create an autocmd, how do I tell which
value to choose?  I only would want to have them removed if
they were unmodified AND if they were not currently being
edited by an active process.

    Maybe a different question: Why doesn't vim clean up
junk left over from a crash -- i.e. swp files that don't hold
any changes and that are not locks from another, active process?
I find such messages "confusing" and slowing down my work, since
I have to bother looking at each of 10-20 messages and making
some decision.

    Is there a reason why vim doesn't clean up its unnecessary
"junk" files that, _clearly_ hold no useful information (i.e.
no changes, and are not locks for active processes)?

    Why wouldn't that be regarded as a bug?


Thanks!
Linda

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[Paul-4]

You could try https://github.com/chrisbra/Recover.vim

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[L. A. Walsh]

Paul wrote:
> You could try https://github.com/chrisbra/Recover.vim
---
    Thanks Paul, it looks like it might be "morphable" into what
I want.  It currently has a bug where it defaults the action
to "Delete" when there are no diffs -- **whether or not**
the file is already open in another window (and just
not changed).

    If that can be 'fixed', then either could have
an option for it to 'auto-choose' delete, or I can
patch that code...

    But it needs to differentiate between "no-edits"+crash
vs. "no-edits"+currently being edited"

    FWIW -- it's a bit "overkill" for what I wanted, as
it also provides option to 'diff', automatically if the
swap-version & disk version are different.  I don't know
if it is needed, but it seems to use python -- maybe
only the diff needs that?  The diff is handy, as
I usually do a diff anyway if I find changes, BUT
not detecting file already being edited limits its
usefulness.

    (Submitted bug & rfe on github site -- hopefully author
is still around and gets notices... )

    Thanks again!


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[Christian Brabandt]

Hi L!

On Di, 14 Mär 2017, L A Walsh wrote:

> Paul wrote:
> >You could try https://github.com/chrisbra/Recover.vim
> ---
>    Thanks Paul, it looks like it might be "morphable" into what
> I want.  It currently has a bug where it defaults the action
> to "Delete" when there are no diffs -- **whether or not**
> the file is already open in another window (and just
> not changed).

I am fairly certain it doesn't.

>    FWIW -- it's a bit "overkill" for what I wanted, as
> it also provides option to 'diff', automatically if the
> swap-version & disk version are different.  I don't know
> if it is needed, but it seems to use python -- maybe

Not it doesn't

> only the diff needs that?  The diff is handy, as
> I usually do a diff anyway if I find changes, BUT
> not detecting file already being edited limits its
> usefulness.
>
>    (Submitted bug & rfe on github site -- hopefully author
> is still around and gets notices... )

Author here.

Best,
Christian
--
Wer ihn als einen Gott der Liebe preist, denkt nicht hoch genug von
der Liebe selber. Wollte dieser Gott nicht auch Richter sein? Aber der
Liebende liebt jenseits von Lohn und Vergeltung.
                -- Friedrich Wilhelm Nietzsche (Zarathrustra IV)

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