Re: [PATCH v4 2/3] replay: add helper to put entry into mapped_commits

From: Patrick Steinhardt <ps@pks.im>
Date: Jun 22, 2026, 13:53 UTC
Message-ID: <ajk-Zok5pAClw7N3@pks.im>
In-Reply-To: <20260622-toon-git-replay-drop-merges-v4-2-ff257f534319@iotcl.com>

On Mon, Jun 22, 2026 at 02:41:56PM +0200, Toon Claes wrote:

Show 22 quoted lines

> diff --git a/replay.c b/replay.c
> index 1f8e5b083b..7921d7dba3 100644
> --- a/replay.c
> +++ b/replay.c
> @@ -256,6 +256,21 @@ static struct commit *mapped_commit(kh_oid_map_t *replayed_commits,
>  	return kh_value(replayed_commits, pos);
>  }
>  
> +static void put_mapped_commit(kh_oid_map_t *replayed_commits,
> +			      struct commit *commit,
> +			      struct commit *new_commit)
> +{
> +	khint_t pos;
> +	int ret;
> +
> +	pos = kh_put_oid_map(replayed_commits, commit->object.oid, &ret);
> +	if (ret == 0)
> +		BUG("Duplicate rewritten commit: %s\n",
> +		    oid_to_hex(&commit->object.oid));
> +
> +	kh_value(replayed_commits, pos) = new_commit;
> +}

The khash map interfaces are quite awkward to use, so having a small wrapper feels sensible to me. It is one of those interfaces that really make you wish for generics in C.

Patrick