Junio C Hamano <gits...@pobox.com> writes:

> Thomas Rast <tr...@inf.ethz.ch> writes:
>> So maybe it would be time to first make up our minds as to what
>> --assume-unchanged should actually mean:
>> * Ignore changes to a tracked file, but treat them as valuable.  In
>>   this case we'd have to make sure that failures like git-stash's are
>>   handled properly.
>> * Ignore changes to a tracked file, as in "who cares if it was changed".
>> * A very specific optimization for users who know what they are doing.
> It has always been a promise the user makes to Git that the working
> tree files that are marked as such will be kept identical to what is
> in the index (hence there is no need for Git to check if they were
> modified). And by extension, Git is now free to choose reading from
> the working tree file when asked to read from blob object recorded
> in the index for that path, or vice versa, because of that promise.
> It is not --ignore-changes bit, and has never been.  What are the
> workflows that are helped if we had such a bit?  If we need to
> support them, I think you need a real --ignore-changes bit, not
> an abuse of --assume-unchanged.

I gather -- from #git -- that it's mostly used for config files, which
have an annoying habit of being different from the repository.

Which is wrong, really.  But we still claim that --assume-unchanged is a
solution to it in git-update-index(1).

Thomas Rast
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