Is it possible to customize the [dir] in entryNames?

[ryanto]

First thank you so much for esbuild. It is an absolute joy to work with!

Issue

I'm running into an issue where I need to bundle some files from a directory in node_modules.

await build({
  entryPoints: [
    './src/**/*.page.js',
    './node_modules/some-module/files/**/*.page.js'
  ], 
  bundle: true,
  entryNames: '[dir]/[name]',
  outbase: "./",
  outdir: './dist',
  platform: 'node',
  format: 'esm',
});

This code works, but the output in ./dist ends up containing a folder called node_modules/, which causes node to think that files under that path are actual node modules. Since that output directory doesn't contain a package.json, node thinks it's a CommonJS module and gets confused to why there's an ESM file in there.

Minimal reproduction

https://github.com/ryanto/esbuild-entrynames-dir

Temp fix I'm using

As a temporary fix, I have dropped [dir] from entryNames so that no folder named node_modules will end up in ./dist. I am using entryNames: [name]-[hash], but I am worried I am going to get a collision due to the large number of files I'm building with similar names. I would love to add [dir] back because it makes debugging and viewing build output easier for me.

It would be great if I could customize the name of the output file to ensure that there's no node_modules name in it's path. I think this might be possibility related to the onEmit plugin API mentioned in #553

Again thank you so much for esbuild!