Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes:
> It's literally just the fact that "git merge" does it with no extra
> flags or checks. I'd like people to have to be aware of what they are
> doing when they merge two different projects, not do it by mistake.
>
> So making it conditional on a flag like "--no-common-root" is what I'd look for.
I think I said essentially the same thing in a separate message; I
am not sure "--no-common-root" is a good name, but I think it is
better to be more explicit than tying this to a strategy.
> I don't think the original "resolve" did it, for example. You can't do
> a three-way merge without a base.
Yes, and that continues to this day:
# Give up if we are given two or more remotes -- not handling octopus.
case "$remotes" in
?*' '?*)
exit 2 ;;
esac
# Give up if this is a baseless merge.
if test '' = "$bases"
then
exit 2
fi
This is a tangent but I wonder if we should say why we refuse to
the standard error before calling these two "exit"s.
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