Subject: Re: [PATCH 2/6] revision: parse parent in indegree_walk_step()

From: [email-masked] (Jakub Narębski)
Date: Thu, 06 Aug 2020 01:16:10 +0200

"Abhishek Kumar via GitGitGadget" <[email-masked]> writes:

> From: Abhishek Kumar <[email-masked]>
>
> In indegree_walk_step(), we add unvisited parents to the indegree queue.
> However, parents are not guaranteed to be parsed. As the indegree queue
> sorts by generation number, let's parse parents before inserting them to
> ensure the correct priority order.
>
> Signed-off-by: Abhishek Kumar <[email-masked]>
> ---
>  revision.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/revision.c b/revision.c
> index 6aa7f4f567..23287d26c3 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -3343,6 +3343,9 @@ static void indegree_walk_step(struct rev_info *revs)
>  		struct commit *parent = p->item;
>  		int *pi = indegree_slab_at(&info->indegree, parent);
>
> +		if (parse_commit_gently(parent, 1) < 0)

All right, parse_commit_gently() avoids re-parsing objects, and makes
use of the commit-graph data.  If parents are not guaranteed to be
parsed, this is a correct thing to do.

Though I do wonder how this issue got missed by the test suite, just
like other reviewers...

> +			return ;

Why this need to be 'return' and not 'continue'?

> +
>  		if (*pi)
>  			(*pi)++;
>  		else

Best,
-- 
Jakub Narębski