Re: [PATCH 1/2] revision: use repository from rev_info when parsing commits

[Derrick Stolee <stolee@gmail.com>]

On 6/23/2020 4:56 PM, Michael Forney wrote:
> This is needed when repo_init_revisions() is called with a repository
> that is not the_repository to ensure appropriate repository is used
> in repo_parse_commit_internal(). If the wrong repository is used,
> a fatal error is the commit-graph machinery occurs:
> 
>   fatal: invalid commit position. commit-graph is likely corrupt
> 
> Since revision.c was the only user of the parse_commit_gently
> compatibility define, remove it from commit.h.

Is this demonstrable in a test case, to prevent regressions?

Notably, you are _not_ dropping parse_commit(), and it would be
easy for another call to that shim to slip into revision.c.

> Signed-off-by: Michael Forney <mforney@mforney.org>
> ---
>  commit.h   |  1 -
>  revision.c | 18 +++++++++---------
>  2 files changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/commit.h b/commit.h
> -#define parse_commit_gently(item, quiet) repo_parse_commit_gently(the_repository, item, quiet)

I'm happy we can drop this shim!

> diff --git a/revision.c b/revision.c
> index ebb4d2a0f2..2b6bf47c81 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -439,7 +439,7 @@ static struct commit *handle_commit(struct rev_info *revs,
>  	if (object->type == OBJ_COMMIT) {
>  		struct commit *commit = (struct commit *)object;
>  
> -		if (parse_commit(commit) < 0)
> +		if (repo_parse_commit(revs->repo, commit) < 0)

I counted 9 copies of parse_commit[_gently]() in my version
of revision.c, so it looks like you caught them all.

Thanks!
-Stolee