How to create plugin for bun-bundler to extract chunks of output in webpack-stats.json format

[bulatshafigullin]

Hi, I need to make stats.json for my website, to use generated outputs and chunks in template generator. I was using webpack for create webpack-stats.json which has following format :

"chunks": {
    "main": [
      "chunk-841dgky7.js",
      "chunk-4rp34rtm.js",
      "main-8zfzwphy.js"
    ]
  }

so I can then use this data to generate <script> tags by using somethis like this render_bundle("main")

I've created plugin for that, but stuck with this and need help:

const webpackStatsPlugin = {
	name: "onEnd example",
	setup(build) {
		build.onEnd(async result => {
			if (result.success) {
				// use result.outputs
				let chunks = {}
				let assets = {}
				result.outputs.filter((o: BuildArtifact) =>  o.kind == "entry-point").map((a: BuildArtifact) => {
					let obj = getNames(a, false)
					chunks[obj.name] = obj.names
					console.log(a)
				})

				Object.entries(chunks).forEach(([k, v]) => {
					v.forEach(assetName => {
						assets[assetName] = {
							name: assetName,
							path: assetName,
							publicPath: "/static/dist/" + assetName,
						}
					})
				})
				
				let res = {
					status: "done",
					publicPath: "/static/dist/",
					chunks: chunks,
					assets: assets,
				}
				let place = path.resolve(__dirname, path.join(build.config.outdir, "webpack-stats.json"))
				Bun.write(place, JSON.stringify(res, null, 2))
			} else {
			}
		})
	},
}

function getNames(a, issub) {
	let names = [];
	if (issub && a.kind == "entry-point") {
		
		return []
	}
	const name = path.basename(a.path)
	if (a.sourcemap) {
		names = getNames(a.sourcemap, true)
		
	}
	
	if (a.kind == "entry-point") {
		let origName = name.replace("-" + a.hash, "").replace(".js", "")
		return {name: origName, names: [...names, name]}
	}
	return [...names, name]
}

I was expecting to take all entry artifacts (kind == 'entry-point')
and traverse them down following sourcemap field
but bundler happens to not be forming graph of relations I expected.
So, my question is, if it's there any way to get the relations graph.