Jeff King [off-list ref] writes:

On Thu, Nov 24, 2022 at 12:55:31AM +0000, Glen Choo via GitGitGadget wrote:

quoted

    object-file: use real paths when adding alternates
    
    Thanks all for the feedback on v2. Once again, this version takes nearly
    all of Ævar's fixup patches [1] :)

This looks fine to me. I'd probably have done the strbuf_realpath()
change I suggested, but I don't mind if you want to punt on it for now.

Thanks, both.

When we designed the alternates long time ago, the "avoid placing
duplicate directories on list" was done merely as an optimization
and not as a correctness measure, as there was no plan to add
anything destructive like "delete all non-local objects".  But now
this seems to matter X-<.