Subject: Re: [PATCH v4 6/9] update-ref: handle rejections while adding updates

From: Patrick Steinhardt <[email-masked]>
Date: Tue, 5 May 2026 07:52:24 +0200

On Mon, May 04, 2026 at 07:44:10PM +0200, Karthik Nayak wrote:
> diff --git a/builtin/update-ref.c b/builtin/update-ref.c
> index 5259cc7226..6355c3dd3e 100644
> --- a/builtin/update-ref.c
> +++ b/builtin/update-ref.c
> @@ -257,6 +266,31 @@ static void print_rejected_refs(const char *refname,
>  	strbuf_release(&sb);
>  }
>  
> +/*
> + * Handle transaction errors. If we're using batches updates, we want to only
> + * die for generic errors and print the remaining to the user.
> + */
> +static void handle_ref_transaction_error(const char *refname,
> +					 struct object_id *new_oid,
> +					 struct object_id *old_oid,
> +					 const char *new_target,
> +					 const char *old_target,
> +					 enum ref_transaction_error tx_err,
> +					 struct strbuf *err,
> +					 struct command_options *opts)
> +{
> +	if (!tx_err)
> +		return;
> +
> +	if (tx_err != REF_TRANSACTION_ERROR_GENERIC && opts->allow_update_failures) {
> +		print_rejected_refs(refname, old_oid, new_oid, old_target,
> +				    new_target, tx_err, err->buf, NULL);
> +		return;
> +	}
> +
> +	die("%s", err->buf);
> +}

It's a bit weird that we pass in the error message as a strbuf given
that we really only care about the actual message.

> @@ -644,6 +699,10 @@ static void update_refs_stdin(unsigned int flags)
>  	struct ref_transaction *transaction;
>  	int i, j;
>  
> +	struct command_options opts = {
> +		.allow_update_failures = flags & REF_TRANSACTION_ALLOW_FAILURE,
> +	};
> +

Nit: stray empty line between the variable declarations.

Other than that this patch looks good to me, thanks!

Patrick