Bare minimum type stubs

Author: james-pre

packages/kit/src/exports/internal/optional-deps.d.ts

@@ -0,0 +1,18 @@
+
+/* Users may not have these packages installed, this prevents errors when using `tsc` without them. */
+/* eslint-disable @typescript-eslint/no-empty-object-type */
+declare module '@opentelemetry/api' {
+	type _ = any;
+
+	export interface Span extends _ {}
+	export interface Tracer extends _ {}
+	export interface SpanContext extends _ {}
+	export enum SpanStatusCode {
+		ERROR = 2
+	}
+	export interface PropagationAPI extends _ {}
+	export interface ContextAPI extends _ {}
+	export const trace: Tracer;
+	export const propagation: PropagationAPI;
+	export const context: ContextAPI;
+}

packages/kit/src/exports/public.d.ts

@@ -25,7 +25,7 @@ import {
 	LayoutParams as AppLayoutParams,
 	ResolvedPathname
 } from '$app/types';
-// @ts-ignore - some users might not have this installed.
+
 import { Span } from '@opentelemetry/api';
 
 export { PrerenderOption } from '../types/private.js';

packages/kit/src/runtime/telemetry/record_span.js

@@ -11,7 +11,7 @@ export async function record_span({ name, attributes, fn }) {
 
 	const { SpanStatusCode, tracer } = await otel;
 
-	return tracer.startActiveSpan(name, { attributes }, async (span) => {
+	return tracer.startActiveSpan(name, { attributes }, async (/** @type {import('@opentelemetry/api').Span} */ span) => {
 		try {
 			return await fn(span);
 		} catch (error) {