Add back sourceMap option

Author: mrbbot

packages/miniflare/src/api.ts

@@ -25,6 +25,7 @@ import {
 import { Log, NoOpLog, Options } from "@miniflare/shared";
 import { SitesPlugin } from "@miniflare/sites";
 import { WebSocketPlugin } from "@miniflare/web-sockets";
+import sourceMap from "source-map-support";
 import { VariedStorageFactory } from "./storage";
 
 // MiniflareCore will ensure CorePlugin is first and BindingsPlugin is last,
@@ -53,12 +54,20 @@ export type Plugins = typeof PLUGINS;
 
 export type MiniflareOptions = Omit<Options<Plugins>, "debug" | "verbose"> & {
   log?: Log;
+  sourceMap?: boolean;
 };
 
 export class Miniflare extends MiniflareCore<Plugins> {
   #storageFactory: VariedStorageFactory;
 
   constructor(options?: MiniflareOptions) {
+    if (options?.sourceMap) {
+      // Node has the --enable-source-maps flag, but this doesn't work for VM scripts.
+      // It also doesn't expose a way of flushing the source map cache, which we need
+      // so previous versions of worker code don't end up in stack traces.
+      sourceMap.install({ emptyCacheBetweenOperations: true });
+    }
+
     const storageFactory = new VariedStorageFactory();
     super(
       PLUGINS,

packages/miniflare/src/cli.ts

@@ -4,18 +4,12 @@ import path from "path";
 import { fileURLToPath } from "url";
 import type { Options } from "@miniflare/shared";
 import { red } from "kleur/colors";
-import sourceMap from "source-map-support";
-import { MiniflareOptions } from "./api";
+import type { MiniflareOptions } from "miniflare";
 import { updateCheck } from "./updater";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
-// Node has the --enable-source-maps flag, but this doesn't work for VM scripts.
-// It also doesn't expose a way of flushing the source map cache, which we need
-// so previous versions of worker code don't end up in stack traces.
-sourceMap.install({ emptyCacheBetweenOperations: true });
-
 function suppressWarnings() {
   // Suppress experimental warnings
   const originalEmitWarning = process.emitWarning;
@@ -84,6 +78,7 @@ async function main() {
     : LogLevel.INFO;
   const mfOptions: MiniflareOptions = options;
   mfOptions.log = new Log(logLevel);
+  mfOptions.sourceMap = true;
   const mf = new Miniflare(mfOptions);
   try {
     // Start Miniflare development server