From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 07 Jul 2014 17:56:23 GMT
Subject: Re: [BUG] rebase no longer omits local commits
Message-ID: <xmqqbnt1dpdk.fsf@gitster.dls.corp.google.com>
In-Reply-To: <20140703222501.GF13153@serenity.lan>

John Keeping <john@keeping.me.uk> writes:

> Perhaps we shuld do something like this (which passes the test suite):
>
> -- >8 --
> diff --git a/git-rebase.sh b/git-rebase.sh
> index 06c810b..0c6c5d3 100755
> --- a/git-rebase.sh
> +++ b/git-rebase.sh
> @@ -544,7 +544,8 @@ if test "$fork_point" = t
>  then
>  	new_upstream=$(git merge-base --fork-point "$upstream_name" \
>  			"${switch_to:-HEAD}")
> -	if test -n "$new_upstream"
> +	if test -n "$new_upstream" &&
> +	   ! git merge-base --is-ancestor "$new_upstream" "$upstream_name"
>  	then
>  		upstream=$new_upstream
>  	fi
> -- 8< --
>
> Since the intent of `--fork-point` is to find the best starting point
> for the "$upstream...$orig_head" range, if the fork point is behind the
> new location of the upstream then should we leave the upstream as it
> was?

Probably; but the check to avoid giving worse fork-point should be
in the implementation of "merge-base --fork-point" itself, so that
we do not have to do the above to both "rebase" and "pull --rebase",
no?

> I haven't thought through this completely, but it seems like we should
> be doing a check like the above, at least when we're in
> "$fork_point=auto" mode.