GNU bug report logs - #26345
25.1; vc-annotate in Git is unable to fully navigate the history if the file was moved

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Message #54 received at 26345 <at> debbugs.gnu.org (full text, mbox):

From: Jakub Ječmínek <kuba <at> kubajecminek.cz>
To: Sean Whitton <spwhitton <at> spwhitton.name>
Cc: wojciech.siewierski <at> gmail.com, 26345 <at> debbugs.gnu.org,
 Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#26345: [PATCH] Handle renamed files when cycling through
 revisions
Date: Sat, 26 Jul 2025 22:14:37 +0200

Sean Whitton <spwhitton <at> spwhitton.name> writes:

>>> Seems like this needs to be investigated before we can proceed.
>> I've tested various scenarios and haven't encountered any issues with the
>> current implementation. It would be great if you could test the change as
>> well, in case there are edge cases I missed.
>
> I think that we need to see an argument in terms of the definition of
> the file-name-changes backend function that demonstrates that your
> approach will always work:
>
> ;;   Return the list of pairs with changes in file names in REV.  When
> ;;   a file was added, it should be a cons with nil car.  When
> ;;   deleted, a cons with nil cdr.  When copied or renamed, a cons
> ;;   with the source name as car and destination name as cdr.

My approach updates the FILE argument only if the file name has changed
in the given revision; otherwise, it keeps the name unchanged. I’m not
sure if it will **always** work, but it does fix the issue at hand. I'm
sorry, but I can't provide any further arguments in favor of this
change.

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