Re: [PATCH 3/3] rebase: use peel_committish() where appropriate

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Ramkumar Ramachandra <artagnon@xxxxxxxxx> writes:

> The revisions specified on the command-line as <onto> and <upstream>
> arguments could be of the form :/quuxery; so, use peel_committish() to
> resolve them.  The failing tests in t/rebase and t/rebase-interactive
> now pass.

You can also specify the commit at the end of the history to be
rebased (very useful while trial runs to see where a series should
apply):

    git rebase foo ":/Add B"

This is already handled properly because it first gets turned into
an object name $orig_head and then we use it (without ^0) to update
the ORIG_HEAD.

Even after this patch, there is

	git checkout -q "$onto^0"

when detaching the HEAD to that commit.  Can that peeling be dropped
now (I am not suggesting to drop it in this patch)?

What would happen when you are given "--onto :/f...o" is somewhat
interesting, but that may be a separate topic, I think.  At that
point, it is probably in the realm of "don't do it then" ;-)

> Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
> ---
>  git-rebase.sh                 | 4 ++--
>  t/t3400-rebase.sh             | 2 +-
>  t/t3404-rebase-interactive.sh | 2 +-
>  3 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/git-rebase.sh b/git-rebase.sh
> index d0c11a9..6987b9b 100755
> --- a/git-rebase.sh
> +++ b/git-rebase.sh
> @@ -434,7 +434,7 @@ then
>  		shift
>  		;;
>  	esac
> -	upstream=`git rev-parse --verify "${upstream_name}^0"` ||
> +	upstream=$(peel_committish "${upstream_name}") ||
>  	die "$(eval_gettext "invalid upstream \$upstream_name")"
>  	upstream_arg="$upstream_name"
>  else
> @@ -470,7 +470,7 @@ case "$onto_name" in
>  	fi
>  	;;
>  *)
> -	onto=$(git rev-parse --verify "${onto_name}^0") ||
> +	onto=$(peel_committish "$onto_name") ||
>  	die "$(eval_gettext "Does not point to a valid commit: \$onto_name")"
>  	;;
>  esac
> diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh
> index 81ec517..cbca71e 100755
> --- a/t/t3400-rebase.sh
> +++ b/t/t3400-rebase.sh
> @@ -88,7 +88,7 @@ test_expect_success 'rebase fast-forward to master' '
>  	test_i18ngrep "Fast-forwarded HEAD to my-topic-branch" out
>  '
>  
> -test_expect_failure 'rebase, with <onto> and <upstream> specified as :/quuxery' '
> +test_expect_success 'rebase, with <onto> and <upstream> specified as :/quuxery' '
>  	test_when_finished "git branch -D torebase" &&
>  	git checkout -b torebase my-topic-branch^ &&
>  	upstream=$(git rev-parse ":/Add B") &&
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index eb241f5..86917d1 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -947,7 +947,7 @@ test_expect_success 'rebase -i respects core.commentchar' '
>  	test B = $(git cat-file commit HEAD^ | sed -ne \$p)
>  '
>  
> -test_expect_failure 'rebase -i, with <onto> and <upstream> specified as :/quuxery' '
> +test_expect_success 'rebase -i, with <onto> and <upstream> specified as :/quuxery' '
>  	test_when_finished "git branch -D torebase" &&
>  	git checkout -b torebase branch1 &&
>  	upstream=$(git rev-parse ":/J") &&
--
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