stop getPlatformProxy crashing with internal DOs

.changeset/shiny-ghosts-flash.md

@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+fix: stop getPlatformProxy crashing when internal DOs are present
+
+Internal DOs still do not work with getPlatformProxy, but warn instead of crashing.

fixtures/get-platform-proxy/tests/get-platform-proxy.env.test.ts

@@ -1,6 +1,14 @@
 import path from "path";
 import { D1Database, R2Bucket } from "@cloudflare/workers-types";
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import {
+	afterEach,
+	beforeEach,
+	describe,
+	expect,
+	it,
+	MockInstance,
+	vi,
+} from "vitest";
 import { getPlatformProxy } from "./shared";
 import type { Hyperdrive, KVNamespace } from "@cloudflare/workers-types";
 import type { Unstable_DevWorker } from "wrangler";
@@ -197,6 +205,52 @@ describe("getPlatformProxy - env", () => {
 		}
 	});
 
+	describe("DO warnings", () => {
+		let warn = {} as MockInstance<typeof console.warn>;
+		beforeEach(() => {
+			warn = vi.spyOn(console, "warn").mockImplementation(() => {});
+		});
+		afterEach(() => {
+			warn.mockRestore();
+		});
+
+		it("warns about internal DOs and doesn't crash", async () => {
+			await getPlatformProxy<Env>({
+				configPath: path.join(__dirname, "..", "wrangler_internal_do.jsonc"),
+			});
+			expect(warn).toMatchInlineSnapshot(`
+				[MockFunction warn] {
+				  "calls": [
+				    [
+				      "▲ [WARNING] 				You have defined bindings to the following internal Durable Objects:
+
+				  				- {"class_name":"MyDurableObject","name":"MY_DURABLE_OBJECT"}
+				  				These will not work in local development, but they should work in production.
+				  
+				  				If you want to develop these locally, you can define your DO in a separate Worker, with a separate configuration file.
+				  				For detailed instructions, refer to the Durable Objects section here: https://developers.cloudflare.com/workers/wrangler/api#supported-bindings
+
+				",
+				    ],
+				  ],
+				  "results": [
+				    {
+				      "type": "return",
+				      "value": undefined,
+				    },
+				  ],
+				}
+			`);
+		});
+
+		it("doesn't warn about external DOs and doesn't crash", async () => {
+			await getPlatformProxy<Env>({
+				configPath: path.join(__dirname, "..", "wrangler_external_do.jsonc"),
+			});
+			expect(warn).not.toHaveBeenCalled();
+		});
+	});
+
 	describe("with a target environment", () => {
 		it("should provide bindings targeting a specified environment and also inherit top-level ones", async () => {
 			const { env, dispose } = await getPlatformProxy<Env>({

fixtures/get-platform-proxy/wrangler_external_do.jsonc

@@ -0,0 +1,24 @@
+{
+	"name": "external-do",
+	"main": "src/index.ts",
+	// external durable object = binding has script_name. This indicates that
+	// the DO is exported in a separate Worker called `do-worker`. For the
+	// purposes of testing, we don't need to set that up because
+	// getPlatformProxy would not be involved in running that Worker.
+
+	"durable_objects": {
+		"bindings": [
+			{
+				"class_name": "MyDurableObject",
+				"name": "MY_DURABLE_OBJECT",
+				"script_name": "do-worker",
+			},
+		],
+	},
+	"migrations": [
+		{
+			"new_sqlite_classes": ["MyDurableObject"],
+			"tag": "v1",
+		},
+	],
+}

fixtures/get-platform-proxy/wrangler_internal_do.jsonc

@@ -0,0 +1,23 @@
+{
+	"name": "internal-do",
+	"main": "src/index.ts",
+	// Internal durable object = the binding does not specify a script name.
+	// This implies the DO is exported alongside this worker in `index.ts`,
+	// which it isn't actually. However we don't care about this here because
+	// getPlatformProxy will discard all user code anyway. We are simply making
+	// sure the warning shows up.
+	"durable_objects": {
+		"bindings": [
+			{
+				"class_name": "MyDurableObject",
+				"name": "MY_DURABLE_OBJECT",
+			},
+		],
+	},
+	"migrations": [
+		{
+			"new_sqlite_classes": ["MyDurableObject"],
+			"tag": "v1",
+		},
+	],
+}

packages/wrangler/e2e/__snapshots__/pages-dev.test.ts.snap

@@ -2,11 +2,6 @@
 
 exports[`Pages 'wrangler pages dev' > should merge (with override) \`wrangler.toml\` configuration with configuration provided via the command line, with command line args taking precedence 1`] = `
 "✨ Compiled Worker successfully
-▲ [WARNING] WARNING: You have Durable Object bindings that are not defined locally in the worker being developed.
-  Be aware that changes to the data stored in these Durable Objects will be permanent and affect the live instances.
-  Remote Durable Objects that are affected:
-  - {"name":"DO_BINDING_1_TOML","class_name":"DO_1_TOML","script_name":"DO_SCRIPT_1_TOML"}
-  - {"name":"DO_BINDING_2_TOML","class_name":"DO_2_TOML","script_name":"DO_SCRIPT_2_TOML"}
 Your Worker and resources are simulated locally via Miniflare. For more information, see: https://developers.cloudflare.com/workers/testing/local-development.
 Your worker has access to the following bindings:
 - Durable Objects:

packages/wrangler/src/__tests__/dev.test.ts

@@ -1288,15 +1288,6 @@ describe.sequential("wrangler dev", () => {
 				  https://developers.cloudflare.com/durable-objects/reference/durable-objects-migrations/ for more
 				  details.
 
-
-				▲ [WARNING] WARNING: You have Durable Object bindings that are not defined locally in the worker being developed.
-
-				  Be aware that changes to the data stored in these Durable Objects will be permanent and affect the
-				  live instances.
-				  Remote Durable Objects that are affected:
-				  - {\\"name\\":\\"NAME_2\\",\\"class_name\\":\\"CLASS_2\\",\\"script_name\\":\\"SCRIPT_A\\"}
-				  - {\\"name\\":\\"NAME_4\\",\\"class_name\\":\\"CLASS_4\\",\\"script_name\\":\\"SCRIPT_B\\"}
-
 				"
 			`);
 		});

packages/wrangler/src/api/integrations/platform/index.ts

@@ -1,6 +1,7 @@
 import { kCurrentWorker, Miniflare } from "miniflare";
 import { getAssetsOptions } from "../../../assets";
 import { readConfig } from "../../../config";
+import { partitionDurableObjectBindings } from "../../../deployment-bundle/entry";
 import { DEFAULT_MODULE_RULES } from "../../../deployment-bundle/rules";
 import { getBindings } from "../../../dev";
 import { getBoundRegisteredWorkers } from "../../../dev-registry";
@@ -11,7 +12,9 @@ import {
 	buildSitesOptions,
 } from "../../../dev/miniflare";
 import { run } from "../../../experimental-flags";
+import { logger } from "../../../logger";
 import { getSiteAssetPaths } from "../../../sites";
+import { dedent } from "../../../utils/dedent";
 import { CacheStorage } from "./caches";
 import { ExecutionContext } from "./executionContext";
 import { getServiceBindings } from "./services";
@@ -129,21 +132,35 @@ export async function getPlatformProxy<
 	};
 }
 
+// this is only used by getPlatformProxy
 async function getMiniflareOptionsFromConfig(
 	rawConfig: Config,
 	env: string | undefined,
 	options: GetPlatformProxyOptions
 ): Promise<Partial<MiniflareOptions>> {
 	const bindings = getBindings(rawConfig, env, true, {});
 
+	if (rawConfig["durable_objects"]) {
+		const { localBindings } = partitionDurableObjectBindings(rawConfig);
+		if (localBindings.length > 0) {
+			logger.warn(dedent`
+				You have defined bindings to the following internal Durable Objects:
+				${localBindings.map((b) => `- ${JSON.stringify(b)}`).join("\n")}
+				These will not work in local development, but they should work in production.
+
+				If you want to develop these locally, you can define your DO in a separate Worker, with a separate configuration file.
+				For detailed instructions, refer to the Durable Objects section here: https://developers.cloudflare.com/workers/wrangler/api#supported-bindings
+				`);
+		}
+	}
 	const workerDefinitions = await getBoundRegisteredWorkers({
 		name: rawConfig.name,
 		services: bindings.services,
 		durableObjects: rawConfig["durable_objects"],
 	});
 
 	const { bindingOptions, externalWorkers } = buildMiniflareBindingOptions({
-		name: undefined,
+		name: rawConfig.name,
 		bindings,
 		workerDefinitions,
 		queueConsumers: undefined,
@@ -162,6 +179,7 @@ async function getMiniflareOptionsFromConfig(
 			{
 				script: "",
 				modules: true,
+				name: rawConfig.name,
 				...bindingOptions,
 				serviceBindings: {
 					...serviceBindings,

packages/wrangler/src/deployment-bundle/entry.ts

@@ -2,7 +2,6 @@ import path from "node:path";
 import dedent from "ts-dedent";
 import { configFileName, formatConfigSnippet } from "../config";
 import { UserError } from "../errors";
-import { logger } from "../logger";
 import { sniffUserAgent } from "../package-manager";
 import guessWorkerFormat from "./guess-worker-format";
 import {
@@ -130,17 +129,7 @@ export async function getEntry(
 		config.tsconfig
 	);
 
-	const { localBindings, remoteBindings } =
-		partitionDurableObjectBindings(config);
-
-	if (command === "dev" && remoteBindings.length > 0) {
-		logger.warn(
-			"WARNING: You have Durable Object bindings that are not defined locally in the worker being developed.\n" +
-				"Be aware that changes to the data stored in these Durable Objects will be permanent and affect the live instances.\n" +
-				"Remote Durable Objects that are affected:\n" +
-				remoteBindings.map((b) => `- ${JSON.stringify(b)}`).join("\n")
-		);
-	}
+	const { localBindings } = partitionDurableObjectBindings(config);
 
 	if (format === "service-worker" && localBindings.length > 0) {
 		const errorMessage =
@@ -171,14 +160,17 @@ export async function getEntry(
  * Groups the durable object bindings into two lists:
  * those that are defined locally and those that refer to a durable object defined in another script.
  */
-function partitionDurableObjectBindings(config: Config): {
+export function partitionDurableObjectBindings(config: Config): {
 	localBindings: DurableObjectBindings;
 	remoteBindings: DurableObjectBindings;
 } {
 	const localBindings: DurableObjectBindings = [];
 	const remoteBindings: DurableObjectBindings = [];
 	for (const binding of config.durable_objects.bindings) {
-		if (binding.script_name === undefined) {
+		if (
+			binding.script_name === undefined ||
+			binding.script_name === config.name
+		) {
 			localBindings.push(binding);
 		} else {
 			remoteBindings.push(binding);