[FR] Add customization for default answers to `org-attach-set/unset-directory' prompt (was: Org-attach risks)

[Ihor Radchenko]

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Kepa <gnu.cognition199@slmails.com> writes:

> I don't know enough to upload a patch, I barely know what is a patch...

No problem. Then, I will turn this discussion into a feature request.
It may be eventually implemented by other interested users.

> I was thinking, and if the default answer is (No) it could work: just 
> clicking ENTER ENTER, no file moving or deleting would take place.
> The danger would be if someday the default is (Yes) and people mechanically 
> send ENTER ENTER ...

We use yes/no prompt rather than (y/n) for a reason - it is a
destructive file operation.

What we may do instead is the following:

In addition to the sequence of prompts when changing the attachment
directory:

1. Copy over attachments from old attachment directory to new one?
2. Delete old attachment directory?

we can introduce a custom variable `org-attach-move-attachments' with
the following values:

1. 'ask (default) - display the prompts
2. 'move - move the attachments form old to new directory (same as yes,
   yes answer)
3. 'copy - copy the attachments, keeping the old directory (yes, no answer)
4. 'keep or nil - keep the attachments in the old directory (no, no answer)

I guess that no, yes answer that would delete the attachments is not
something we want to allow as automatic behavior.

-- 
Ihor Radchenko // yantar92,
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