[wrangler] "default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs"

[jvbianchi]

Environment

cloudflare pages

Reproduction

try to deploy Nuxt to cloudflare pages using the /server/api/hello.ts folder with a simple test

export default defineEventHandler((_event) => {
  return {
    hello: "Hello from Server!!!",
  };
});

Describe the bug

"default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs"

Additional context

unenv-nightly version 1.10.0-1717606461.a117952

Logs

19:41:10.273	[info] [nitro] Building Nuxt Nitro server (preset: `cloudflare-pages`)
19:41:11.891	node_modules/std-env/dist/index.mjs (1:9): Error when using sourcemap for reporting an error: Can't resolve original location of error.
19:41:11.891	[error] [nitro] RollupError: node_modules/std-env/dist/index.mjs (1:9): "default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs", imported by "node_modules/std-env/dist/index.mjs".
19:41:11.892	
19:41:11.892	
19:41:11.892	1: import { default as process } from 'unenv/runtime/polyfill/process';
19:41:11.892	            ^
19:41:11.892	2: 
19:41:11.892	3: const r=Object.create(null),E=e=>globalThis.process?.env||globalThis._importMeta_.env||globalThis.Deno?.env.toObject(...
19:41:11.893	[error] node_modules/std-env/dist/index.mjs (1:9): "default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs", imported by "node_modules/std-env/dist/index.mjs".
19:41:11.894	  at getRollupError (node_modules/rollup/dist/es/shared/parseAst.js:396:41)
19:41:11.894	  at error (node_modules/rollup/dist/es/shared/parseAst.js:392:42)
19:41:11.894	  at Module.error (node_modules/rollup/dist/es/shared/node-entry.js:13858:16)
19:41:11.894	  at Module.traceVariable (node_modules/rollup/dist/es/shared/node-entry.js:14306:29)
19:41:11.894	  at ModuleScope.findVariable (node_modules/rollup/dist/es/shared/node-entry.js:11984:39)
19:41:11.894	  at Identifier.bind (node_modules/rollup/dist/es/shared/node-entry.js:6908:40)
19:41:11.894	  at UnaryExpression.bind (node_modules/rollup/dist/es/shared/node-entry.js:4775:23)
19:41:11.894	  at BinaryExpression.bind (node_modules/rollup/dist/es/shared/node-entry.js:4775:23)
19:41:11.895	  at LogicalExpression.bind (node_modules/rollup/dist/es/shared/node-entry.js:4775:23)
19:41:11.895	  at LogicalExpression.bind (node_modules/rollup/dist/es/shared/node-entry.js:4775:23) 
19:41:11.895	
19:41:11.895	[error] node_modules/std-env/dist/index.mjs (1:9): "default" is not exported by "node_modules/unenv/runtime/polyfill/process.mjs", imported by "node_modules/std-env/dist/index.mjs".
19:41:11.930	Failed: Error while executing user command. Exited with error code: 1

[pi0]

Are you force resolving unenv to nighyly version in your Nitro project?

[jvbianchi]

No , I just install nuxt using Bun with this command:

bun create cloudflare@latest my-nuxt-app -- --framework=nuxt

[pi0]

You have mentioned unenv-nightly version 1.10.0-1717606461.a117952 how it is there?

Can you please share npm why unenv / pnpm why unenv (depending on your package manager)

[jvbianchi]

I just saw, It's one of wrangler's depencies:

[email protected]:
  version "3.60.3"
  resolved "https://registry.npmjs.org/wrangler/-/wrangler-3.60.3.tgz"
  integrity sha512-a6zn/KFnYaYp3nxJR/aP0TeaBvJDkrrfI89KoxUtx28H7zpya/5/VLu3CxQ3PRspEojJGF0s6f3/pddRy3F+BQ==
  dependencies:
    unenv "npm:[email protected]"
    nanoid "^3.3.3"
    esbuild "0.17.19"
    resolve "^1.22.8"
    chokidar "^3.5.3"
    miniflare "3.20240610.0"
    selfsigned "^2.0.1"
    source-map "0.6.1"
    blake3-wasm "^2.1.5"
    xxhash-wasm "^1.0.1"
    path-to-regexp "^6.2.0"
    resolve.exports "^2.0.2"
    "@cloudflare/kv-asset-handler" "0.3.2"
    "@esbuild-plugins/node-globals-polyfill" "^0.2.3"
    "@esbuild-plugins/node-modules-polyfill" "^0.2.2"
  optionalDependencies:
    fsevents "~2.3.2"

It was changed in this commit: cloudflare/workers-sdk@1e68fe5

[IgorMinar]

Interesting. Is this some kind of weird npm package hoisting issue?

I've just tested the repro with pnpm and it works just fine for me, and I see

$ pnpm list --depth=20 unenv unenv-nightly
Legend: production dependency, optional only, dev only

nuxt-app /my-nuxt-app2

dependencies:
nuxt 3.12.2
├─┬ @nuxt/vite-builder 3.12.2
│ ├─┬ h3 1.11.1
│ │ └── unenv 1.9.0
│ └── unenv 1.9.0
├─┬ h3 1.11.1
│ └── unenv 1.9.0
├─┬ nitropack 2.9.6
│ ├─┬ h3 1.11.1
│ │ └── unenv 1.9.0
│ ├─┬ listhen 1.7.2
│ │ └─┬ h3 1.11.1
│ │   └── unenv 1.9.0
│ ├── unenv 1.9.0
│ └─┬ unstorage 1.10.2
│   ├─┬ h3 1.11.1
│   │ └── unenv 1.9.0
│   └─┬ listhen 1.7.2
│     └─┬ h3 1.11.1
│       └── unenv 1.9.0
├── unenv 1.9.0
└─┬ unstorage 1.10.2
  └─┬ h3 1.11.1
    └── unenv 1.9.0

devDependencies:
h3 1.11.1
└── unenv 1.9.0
wrangler 3.60.3
└── unenv-nightly 1.10.0-1717606461.a117952

[IgorMinar]

Could you try to use pnpm or somehow tell bun not to hoist packages (I'm not a bun user, but I hope there is a way to do that).

@pi0 we could try to bundle unenv-nightly into Wrangler but it's tricky because unenv has built-time and runtime component and we currently get the runtime-component from the npm package (the built-time part is already bundled into the wrangler bundle).

[jvbianchi]

When I install unenv as a dev dependency (version 1.9.0) the error goes way.

[IgorMinar]

@jvbianchi which suggests that bun's package hoisting is the culprit here.

[pi0]

Thanks for report dear @jvbianchi

As you have already figured out, adding latest (1.9.x) version of unenv to your main project dependencies, devDependencies (or resolutions if those won't work will fix the hoisting issue in your project.

For the followup:

• fix: add default export for polyfill/process #261 adds back default export but needs a bump in wrangler deps
• Wrangler to update to non nightly dependency of unenv (this is to reduce hoisting issue with npm: protocol)