Function resolveDepOptimizationOptions

packages/vite/src/node/config.ts:1193–1350

(
  optimizeDeps: DepOptimizationOptions | undefined,
  preserveSymlinks: boolean,
  forceOptimizeDeps: boolean | undefined,
  consumer: 'client' | 'server' | undefined,
  logger: Logger,
)

// TODO: Introduce ResolvedDepOptimizationOptions
function resolveDepOptimizationOptions(
  optimizeDeps: DepOptimizationOptions | undefined,
  preserveSymlinks: boolean,
  forceOptimizeDeps: boolean | undefined,
  consumer: 'client' | 'server' | undefined,
  logger: Logger,
): DepOptimizationOptions {
  if (
    optimizeDeps?.rolldownOptions &&
    optimizeDeps?.rolldownOptions === optimizeDeps?.rollupOptions
  ) {
    delete optimizeDeps?.rollupOptions
  }
  const merged = mergeWithDefaults(
    {
      ...configDefaults.optimizeDeps,
      disabled: undefined, // do not set here to avoid deprecation warning
      noDiscovery: consumer !== 'client',
      force: forceOptimizeDeps ?? configDefaults.optimizeDeps.force,
    },
    optimizeDeps ?? {},
  )
  setupRollupOptionCompat(merged, 'optimizeDeps')

  const rolldownOptions = merged.rolldownOptions as Exclude<
    DepOptimizationOptions['rolldownOptions'],
    undefined
  >

  if (merged.esbuildOptions && Object.keys(merged.esbuildOptions).length > 0) {
    logger.warn(
      colors.yellow(
        `You or a plugin you are using have set \`optimizeDeps.esbuildOptions\` ` +
          `but this option is now deprecated. ` +
          `Vite now uses Rolldown to optimize the dependencies. ` +
          `Please use \`optimizeDeps.rolldownOptions\` instead.`,
      ),
    )

    rolldownOptions.resolve ??= {}
    rolldownOptions.output ??= {}
    rolldownOptions.transform ??= {}

    const setResolveOptions = <
      T extends keyof Exclude<RolldownOptions['resolve'], undefined>,
    >(
      key: T,
      value: Exclude<RolldownOptions['resolve'], undefined>[T],
    ) => {
      if (value !== undefined && rolldownOptions.resolve![key] === undefined) {
        rolldownOptions.resolve![key] = value
      }
    }

    if (
      merged.esbuildOptions.minify !== undefined &&
      rolldownOptions.output.minify === undefined
    ) {