Worker not working in production build

[fhollste]

I've setup a worker with

new Document({
   ...
  worker: 1
})

Everything word fine in development but then trying to run a production build (Nextjs with webpack) I get an error
`Error: Cannot find module '/Users/fredrik/dist/node/node.js'

This is most likely due to "../dist/node/node.js" not being part of the bundle.

Any ideas or workarounds for this?

[vincesp]

Seems to be this line:

flexsearch/src/worker/index.js

Line 138 in 9abb781

eval('new (require("worker_threads")["Worker"])("../dist/node/node.js")')

The first parameter for new Worker() is fileName which is a path relative to the current working directory. So above line only works if you start your script from a working directory inside of the flexsearch package.

[vincesp]

So here would be a workaround:

const path = require('node:path')
const { Worker } = require('flexsearch')

function createWorker() {
  const cwd = process.cwd()
  try {
    process.chdir(path.dirname(require.resolve('flexsearch')))
    return new Worker()
  } finally {
    process.chdir(cwd)
  }
}

const myWorker = createWorker()

Or with return new Document() accordingly.

[ts-thomas]

Why you bundle a Node.js Server-side-only application?

[vincesp]

It is part of an Electron backend. The MSI installer that Electron uses only copies files, it does not do an npm install, so we have to bundle all dependencies.

[ts-thomas]

Here are some example of the new version: https://github.com/nextapps-de/flexsearch/tree/v0.8-preview?tab=readme-ov-file#example-nodejs
The worker import was improved but maybe has still some issues. I really would like to improve that