Re: [RFC PATCH v2 2/2] rebase-interactive: warn if commit is dropped with --edit-todo

From: Phillip Wood <phillip.wood123@gmail.com>
To: Alban Gruin <alban.gruin@gmail.com>, git@vger.kernel.org
Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Phillip Wood <phillip.wood@dunelm.org.uk>
Subject: Re: [RFC PATCH v2 2/2] rebase-interactive: warn if commit is dropped with --edit-todo
Date: Tue, 5 Nov 2019 14:20:37 +0000	[thread overview]
Message-ID: <7ca0f5c7-9c6c-34fe-215a-c57946f18f2c@gmail.com> (raw)
In-Reply-To: <20191104095449.9964-3-alban.gruin@gmail.com>

Hi Alban

Thanks for working on this. I've got a couple of specific comments 
below. On a more general level I'd be tempted to squash the two patches 
together rather than adding the tests as a separate commit. Also I think 
before we discussed having `rebase --continue` refuse to continue if 
`rebase --edit-todo` had dropped commits when rebase.missingCommitsCheck 
was set to error. I think that would be useful but could always come 
later. --edit-todo could write a file to .git/rebase-merge to prevent 
--continue from continuing in case of errors.

On 04/11/2019 09:54, Alban Gruin wrote:
> This adds the ability for --edit-todo to check if commits were dropped
> by the user.  As both edit_todo_list() and complete_action() parse the
> todo list and check for dropped commits, the code doing so in the latter
> is removed to reduce duplication.
> 
> Tests added previously should work now.
> 
> Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
> ---
>   rebase-interactive.c          | 7 +++----
>   sequencer.c                   | 5 +----
>   t/t3404-rebase-interactive.sh | 4 ++--
>   3 files changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/rebase-interactive.c b/rebase-interactive.c
> index aa18ae82b7..1b8d7f25bf 100644
> --- a/rebase-interactive.c
> +++ b/rebase-interactive.c
> @@ -115,10 +115,9 @@ int edit_todo_list(struct repository *r, struct todo_list *todo_list,
>   	if (initial && new_todo->buf.len == 0)
>   		return -3;
>   
> -	/* For the initial edit, the todo list gets parsed in
> -	 * complete_action(). */
> -	if (!initial)
> -		return todo_list_parse_insn_buffer(r, new_todo->buf.buf, new_todo);
> +	if (todo_list_parse_insn_buffer(r, new_todo->buf.buf, new_todo) ||
> +	    todo_list_check(todo_list, new_todo))
> +		return -4;
>   
>   	return 0;
>   }
> diff --git a/sequencer.c b/sequencer.c
> index 9d5964fd81..92f2e6f6a0 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -5062,10 +5062,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
>   		todo_list_release(&new_todo);
>   
>   		return error(_("nothing to do"));
> -	}
> -
> -	if (todo_list_parse_insn_buffer(r, new_todo.buf.buf, &new_todo) ||
> -	    todo_list_check(todo_list, &new_todo)) {
> +	} else if (res == -4) {
>   		fprintf(stderr, _(edit_todo_list_advice));

Do we want to print this advice when `rebase --edit-todo` detects 
dropped commits as well? I'm not clear what error messages are printed 
it that case. If we always want this printed then it could be moved into 
edit_todo_list()

Thanks again for working on this, it's a really useful addition to rebase

Best Wishes

Phillip

>   		checkout_onto(r, opts, onto_name, &onto->object.oid, orig_head);
>   		todo_list_release(&new_todo);
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index be8badf7b3..040ec616f3 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -1366,7 +1366,7 @@ test_expect_success 'rebase --edit-todo respects rebase.missingCommitsCheck = ig
>   		actual
>   '
>   
> -test_expect_failure 'rebase --edit-todo respects rebase.missingCommitsCheck = warn' '
> +test_expect_success 'rebase --edit-todo respects rebase.missingCommitsCheck = warn' '
>   	cat >expect <<-EOF &&
>   	error: invalid line 1: badcmd $(git rev-list --pretty=oneline --abbrev-commit -1 master~4)
>   	Warning: some commits may have been dropped accidentally.
> @@ -1395,7 +1395,7 @@ test_expect_failure 'rebase --edit-todo respects rebase.missingCommitsCheck = wa
>   		actual
>   '
>   
> -test_expect_failure 'rebase --edit-todo respects rebase.missingCommitsCheck = error' '
> +test_expect_success 'rebase --edit-todo respects rebase.missingCommitsCheck = error' '
>   	cat >expect <<-EOF &&
>   	error: invalid line 1: badcmd $(git rev-list --pretty=oneline --abbrev-commit -1 master~4)
>   	Warning: some commits may have been dropped accidentally.
> 