bug#47493: 27.1; auto-save-file-name-transforms with uniquify should not create invalid filenames

[Lars Ingebrigtsen]

Michael Albinus <michael.albinus@gmx.de> writes:

>> Maybe we could have a flag which means "convert the directory part of a
>> file name into sha1" (or whatever `secure-hash' provides).
>
> Nobody has commented. Well, in a couple of days I will push the appended
> patch, unless there are objections.

As far as I can tell, the patch wasn't pushed?

> + If the optional element UNIQUIFY is a symbol returned by function
> + `secure-hash-algorithms', the auto-save file name is constructed
> + by taking the directory part of the replaced file-name,
> + concatenated with the buffer file name run through `secure-hash'
> + instead.  This returns a valid name for your filesystem any way.

Vladimir didn't have any examples for invalid file names, apparently,
but it looks like a good change to me.  (I.e., being able to opt in to
using a hash instead of !!-ing.)

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