support `node:inspector`

[ivawzh]

What is the problem this feature would solve?

Due to lacking support of node:inspector, our bun projects cannot support typedoc. This is very troubling as we own a significant amount of repos and rely on typedoc to generate all-in-one documentation.

What is the feature you are proposing to solve the problem?

Support inspector or having alternative way to walk around.

What alternatives have you considered?

No response

[Electroid]

We do plan on having a better debugging experience, which might include node:inspector. However, for typedoc, it looks like it's just doing a simple see if it's in debug mode.

import { url } from "inspector";
// ...
const isDebugging = () => !!url();

Code

In the interim, we should consider adding a no-op polyfill. cc @Jarred-Sumner

[klippx]

@Electroid I want to flag another possible use case for something similar to node:inspector. As discussed in this thread we are interested in exposing the length of the runtime micro task queue as a metric for our app.

As an orthogonal task to this we are also looking into Bun.

So... Marrying the two concepts here: Is there a way to do what we want in Bun today? Perhaps via some 'bun:inspector' API, or via JavaScriptCore directly perhaps?

[mProjectsCode]

Is it possible to write a polyfill for it so that i can use typedoc with bun or is this something that needs to be fixed on buns side?

[klippx]

In our case we have decided against this feature as it was a significant cost to scan the JS heap looking for promises. It was so slow there is no way we can afford to run it in prod.

Now, if there was a simple atomic counter counting the promises in the micro task queue that would be much more efficient. IDK how feasible that would be.

[BeatsuDev]

This error comes up when trying to run vite --profile too.

[Robbson]

I also get this error when trying to compile my docs via Typedoc.

[emberglazee]

+1, same with @pm2/io

[pragmatta]

Also hit this trying to use typedoc.

[yus-ham]

From pm2 log-rotate

NotImplementedError: node:inspector Session is not yet implemented in Bun. Track the status & thumbs up the issue: https://github.com/oven-sh/bun/issues/2445
 code: "ERR_NOT_IMPLEMENTED"

      at new NotImplementedError (internal:shared:19:27)
      at internal:shared:2:69
      at new Session (node:inspector:13:27)
      at init (/home/portal/.bun/install/global/node_modules/@pm2/io/build/main/services/inspector.js:13:24)
      at init (/home/portal/.bun/install/global/node_modules/@pm2/io/build/main/pmx.js:77:13)
      at /home/portal/.bun/install/global/node_modules/@pm2/io/build/main/index.js:5:45
      at injectModules (/home/portal/.bun/install/global/node_modules/pm2/lib/ProcessUtils.js:6:13)
      at /home/portal/.bun/install/global/node_modules/pm2/lib/ProcessContainerFork.js:9:1

Bun v1.1.7-canary.1+bbb906c66 (Linux x64 baseline)

[0pilatos0]

also running into this issue with vitest ui mode

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Unhandled Error ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯NotImplementedError: node:inspector is not yet implemented in Bun. Track the status & thumbs up the issue: https://github.com/oven-sh/bun/issues/2445
 ❯ new ::bunternal:: internal:shared:19:14
 ❯ ::bunternal:: internal:shared:2:35
 ❯ new ::bunternal:: node:inspector:13:14
 ❯ module code node_modules/@vitest/coverage-v8/dist/index.js:4:17

⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯Serialized Error: { code: 'ERR_NOT_IMPLEMENTED', originalLine: 19, originalColumn: 14, line: 19, column: 14, sourceURL: 'internal:shared' }