Re: [PATCH v3 2/5] commit: allow a partial commit when a rebase pick becomes empty

> From: Elijah Newren <newren@gmail.com>
>
> For years, we disallowed partial commits during merges or cherry-picks.
> In commit 430b75f7209c (commit: give correct advice for empty commit
> during a rebase, 2019-12-06) it was noted that the "cannot do a partial
> commit during a cherry-pick" message was also printed when rebasing a
> commit that became empty, and rather than drop the check in that case,
> that commit opted to make the message print the actual operation that
> was in progress.
>
> Since a commit that has become empty comes without conflicts, a new
> partial commit poses no problems; remove the error in that case.
>
> Signed-off-by: Elijah Newren <newren@gmail.com>
> ---
>  builtin/commit.c              | 2 --
>  t/t3404-rebase-interactive.sh | 5 ++---
>  2 files changed, 2 insertions(+), 5 deletions(-)

>
> diff --git a/builtin/commit.c b/builtin/commit.c
> index 569e31fb60..610820c99f 100644
> --- a/builtin/commit.c
> +++ b/builtin/commit.c
> @@ -520,8 +520,6 @@ static const char *prepare_index(const char **argv, const char *prefix,
>  			die(_("cannot do a partial commit during a merge."));
>  		else if (is_from_cherry_pick(whence))
>  			die(_("cannot do a partial commit during a cherry-pick."));
> -		else if (is_from_rebase_empty(whence))
> -			die(_("cannot do a partial commit during a rebase."));
>  	}
>  
>  	if (list_paths(&partial, !current_head ? NULL : "HEAD", &pathspec))
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index ff11abb2f2..3588e16543 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -1858,7 +1858,7 @@ test_expect_success 'post-commit hook is called' '
>  	test_cmp expect actual
>  '
>  
> -test_expect_success 'correct error message for partial commit after empty pick' '
> +test_expect_success 'partial commit is allowed when a rebase pick becomes empty' '
>  	test_when_finished "git rebase --abort" &&
>  	(
>  		set_fake_editor &&
> @@ -1867,8 +1867,7 @@ test_expect_success 'correct error message for partial commit after empty pick'
>  		test_must_fail git rebase -i A D
>  	) &&
>  	echo x >file1 &&
> -	test_must_fail git commit file1 2>err &&
> -	test_grep "cannot do a partial commit during a rebase." err
> +	git commit file1
>  '
>  
>  test_expect_success 'correct error message for commit --amend after empty pick' '