Subject: Re: [PATCH 1/2] commit-reach: create repo_is_descendant_of()

From: Taylor Blau <[email-masked]>
Date: Mon, 29 Jun 2020 09:40:35 -0400

On Wed, Jun 17, 2020 at 05:24:28PM +0000, Derrick Stolee via GitGitGadget wrote:
> From: Derrick Stolee <[email-masked]>
>
> The next change will make repo_in_merge_bases() depend on the logic in
> is_descendant_of(), but we need to make the method independent of
> the_repository first.
>
> Signed-off-by: Derrick Stolee <[email-masked]>
> ---
>  commit-reach.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/commit-reach.c b/commit-reach.c
> index 4ca7e706a18..13722430aa5 100644
> --- a/commit-reach.c
> +++ b/commit-reach.c
> @@ -283,7 +283,9 @@ struct commit_list *repo_get_merge_bases(struct repository *r,
>  /*
>   * Is "commit" a descendant of one of the elements on the "with_commit" list?
>   */
> -int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
> +static int repo_is_descendant_of(struct repository *r,
> +				 struct commit *commit,
> +				 struct commit_list *with_commit)
>  {
>  	if (!with_commit)
>  		return 1;
> @@ -301,13 +303,18 @@ int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
>
>  			other = with_commit->item;
>  			with_commit = with_commit->next;
> -			if (in_merge_bases(other, commit))
> +			if (repo_in_merge_bases(r, other, commit))
>  				return 1;
>  		}
>  		return 0;
>  	}
>  }
>
> +int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
> +{
> +	return repo_is_descendant_of(the_repository, commit, with_commit);
> +}
> +

I don't think that it makes a big deal either way, but I wonder about
moving 'repo_is_descendant_of' to the header file, and making
'is_descendant_of' be 'static inline int' as you defined it here.

Since this has already graduated up to master already, I don't think
that it's worth going back just to shuffle this code around, but I was
wondering if you had any specific reason for doing it this way.

>  /*
>   * Is "commit" an ancestor of one of the "references"?
>   */
> --
> gitgitgadget
>
Thanks,
Taylor