minecraft_launcher/src/server/routes/index.ts

import { Router } from 'express'
import { listPackKeys, loadPackDefinition, readManifest } from '../../shared/store'

export const indexRouter = Router()

indexRouter.get('/', async (_req, res, next) => {
  try {
    const manifest = await readManifest()
    const definitionMap = new Map<string, Awaited<ReturnType<typeof loadPackDefinition>>>()
    const keys = await listPackKeys()
    for (const key of keys) {
      definitionMap.set(key, await loadPackDefinition(key))
    }
    const packs = manifest.packs.map((entry) => ({
      name: entry.name,
      file: entry.file,
      definition: definitionMap.get(entry.file) ?? null
    }))
    res.render('index', { packs })
  } catch (error) {
    next(error)
  }
})