Miroslav Suchý wrote:
> When I make SPDX statistics I have git checkout of all dist-gits and do
> git-pull every two week there. This morning I found that two times I got
> an error:
>
> hint: Diverging branches can't be fast-forwarded, you need to either:
> hint:
> hint: git merge --no-ff
> hint:
> hint: or:
> hint:
> hint: git rebase
> hint:
> hint: Disable this message with "git config advice.diverging false"
> fatal: Not possible to fast-forward, aborting.
> Could not execute pull: Failed to execute command.
>
> I was under the impression that our dist-git can have only forward
> commits.
You should always (from all upstreams, no matter whether they allow force
pushes or not) pull with rebase (git pull --rebase). This rebases your
local, not yet pushed, changes on top of the upstream changes. Since it does
not change the upstream history, only your local unpushed one, it should
never require a force-push and hence always be safe. And it works even if
the upstream has been force-pushed (which should never happen in Fedora, but
can be an issue in other projects).
A pull with fast-forward only will fail if you have local changes, as you
can see above. A pull with merge will create a merge commit. The pull with
rebase is the cleanest option.
Kevin Kofler
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