bundleWorkerEntry() — vite Function Reference

Source Code

packages/vite/src/node/plugins/worker.ts lines 162–292

async function bundleWorkerEntry(
  config: ResolvedConfig,
  id: string,
): Promise<WorkerBundle> {
  const input = cleanUrl(id)

  const workerOutput = workerOutputCaches.get(config.mainConfig || config)!
  workerOutput.removeBundleIfInvalidated(input)

  const bundleInfo = workerOutput.getWorkerBundle(input)
  if (bundleInfo) {
    return bundleInfo
  }

  const newBundleChain = [...config.bundleChain, input]
  if (config.bundleChain.includes(input)) {
    throw new Error(
      'Circular worker imports detected. Vite does not support it. ' +
        `Import chain: ${newBundleChain.map((id) => prettifyUrl(id, config.root)).join(' -> ')}`,
    )
  }

  // bundle the file as entry to support imports
  const { rolldown } = await import('rolldown')
  const { plugins, rollupOptions, format } = config.worker
  const workerConfig = await plugins(newBundleChain)
  const workerEnvironment = new BuildEnvironment('client', workerConfig) // TODO: should this be 'worker'?
  await workerEnvironment.init()

  const chunkMetadataMap = new ChunkMetadataMap()
  const bundle = await rolldown({
    ...rollupOptions,
    input,
    plugins: workerEnvironment.plugins.map((p) =>
      injectEnvironmentToHooks(workerEnvironment, chunkMetadataMap, p),
    ),
    onLog(level, log) {
      onRollupLog(level, log, workerEnvironment)
    },
    // TODO: remove this and enable rolldown's CSS support later
    moduleTypes: {
      '.css': 'js',
      ...rollupOptions.moduleTypes,
    },
    preserveEntrySignatures: false,
  })
  let result: RolldownOutput
  let watchedFiles: string[] | undefined
  try {
    const workerOutputConfig = config.worker.rollupOptions.output
    const workerConfig = workerOutputConfig
      ? Array.isArray(workerOutputConfig)
        ? workerOutputConfig[0] || {}
        : workerOutputConfig
      : {}
    result = await bundle.generate({
      entryFileNames: path.posix.join(
        config.build.assetsDir,
        '[name]-[hash].js',
      ),
      chunkFileNames: path.posix.join(
        config.build.assetsDir,
        '[name]-[hash].js',
      ),
      assetFileNames: path.posix.join(
        config.build.assetsDir,
        '[name]-[hash].[ext]',
      ),
      minify:
        config.build.minify === 'oxc'
          ? true
          : config.build.minify === false
            ? 'dce-only'
            : undefined,
      ...workerConfig,
      format,
      sourcemap: config.build.sourcemap,
    })
    watchedFiles = (await bundle.watchFiles).map((f) => normalizePath(f))
  } catch (e) {
    // adjust rollup format error