Re: [PATCH] git-am: suggest what to do with superfluous patches

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Jan Krüger <jk@xxxxx> writes:

> Particularly in the context of rebase, conflicts frequently occur
> because the change in the patch to be applied was made obsolete by new
> upstream commits. In this case, solving the conflict effectively means
> skipping the patch. However, it's not always readily apparent that the
> patch needs to be skipped, and when people solve the conflict and try
> git rebase --continue, they get confronted with a message of
>
>   No changes - did you forget to use 'git add'?
>
> That's not very helpful if you did actually stage your changes and they
> happen to turn the patch into a no-op. This extends the message to point
> out what's going on.
>
> Signed-off-by: Jan Krüger <jk@xxxxx>
> ---

I think this is a change in a good direction; we _might_ want to allow
this squelched with "advice.*" configuration, but my gut feeling is that
it wouldn't probably matter much, as it is rather rare to trigger this.

> diff --git a/git-am.sh b/git-am.sh
> index 87ffae2..43ea52c 100755
> --- a/git-am.sh
> +++ b/git-am.sh
> @@ -726,6 +726,8 @@ do
>  		resolved=
>  		git diff-index --quiet --cached HEAD -- && {
>  			echo "No changes - did you forget to use 'git add'?"
> +			echo "If there is nothing left to stage, chances are that something else"
> +			echo "already introduced the same changes; you might want to skip this patch."

The exact wording I'd let people to fight out, but I think this is
probably better than Ramkumar's one that says "if you dropped".  The user
may not know that he is doing an equivalent of dropping as a side effect
of the new base that had accepted the same change, and your message nudges
the reader to realize that.
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