Function update_head_with_reflog

sequencer.c:1259–1295

}

int update_head_with_reflog(const struct commit *old_head,
			    const struct object_id *new_head,
			    const char *action, const struct strbuf *msg,
			    struct strbuf *err)
{
	struct ref_transaction *transaction;
	struct strbuf sb = STRBUF_INIT;
	const char *nl;
	int ret = 0;

	if (action) {
		strbuf_addstr(&sb, action);
		strbuf_addstr(&sb, ": ");
	}

	nl = strchr(msg->buf, '\n');
	if (nl) {
		strbuf_add(&sb, msg->buf, nl + 1 - msg->buf);
	} else {
		strbuf_addbuf(&sb, msg);
		strbuf_addch(&sb, '\n');
	}

	transaction = ref_store_transaction_begin(get_main_ref_store(the_repository),
						  0, err);
	if (!transaction ||
	    ref_transaction_update(transaction, "HEAD", new_head,
				   old_head ? &old_head->object.oid : null_oid(the_hash_algo),
				   NULL, NULL, 0, sb.buf, err) ||
	    ref_transaction_commit(transaction, err)) {
		ret = -1;
	}
	ref_transaction_free(transaction);
	strbuf_release(&sb);

	return ret;
}

static int pipe_from_strbuf(int hook_stdin_fd, void *pp_cb, void *pp_task_cb UNUSED)
{