[MlMt] 5933: Dragging files into a folder => files are locked (immutable set)

[Alexandre Takacs]

Although not exactly the same issue I have recently witnessed that some 
attachements would have the invisible property set (on what I can only 
categorise as randomly). Can’t really reproduce it but definitely 
happens.

On 26 Jan 2023, at 12:16, Benny Kjær Nielsen wrote:

> On 7 Jan 2023, at 13:35, Robert M. Münch wrote:
>
>> I see this effect I think since I use 5933.
>
> The change is in r5927 (November 10th, 2022).
>
>> I do exactly the same as in the past, but now is looks like files are 
>> somehow locked by MM. Checking the file attributes I see that the 
>> *Immutable* flag is set.
>>
>> Is this a known problem? How to fix/workaround it?
>
> I can see this developed into a very large thread. Someone found the 
> workaround, but I repeat it here to make sure it's more easily found:
>
>     defaults write com.freron.MailMate 
> MmAttachmentsCacheImmutableStateDisabled -bool YES
>
> But it's only to be used by users who understand that attachments are 
> saved in a *temporary* location which can be deleted at any time. It 
> just doesn't happen very often.
>
> I can add that the change was motivated by a user working on a 
> document for weeks (possibly hundreds of hours). The corresponding 
> email was later deleted and MailMate cleaned up by also removing 
> temporary files related to the email. Note that the cache is not part 
> of a Time Machine backup. The file could not be salvaged.
>
> I have some notes on how this behavior could be improved, but the 
> quick/safest fix was to simply disallow it.
>
> -- 
> Benny
> https://freron.com/become_a_mailmate_patron/
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