Function createDepsOptimizer

packages/vite/src/node/optimizer/optimizer.ts:40–747

(
  environment: DevEnvironment,
)

const debounceMs = 100

export function createDepsOptimizer(
  environment: DevEnvironment,
): DepsOptimizer {
  const { logger } = environment
  const sessionTimestamp = Date.now().toString()

  let debounceProcessingHandle: NodeJS.Timeout | undefined

  let closed = false

  const options = environment.config.optimizeDeps

  const { noDiscovery, holdUntilCrawlEnd } = options

  let metadata: DepOptimizationMetadata = initDepsOptimizerMetadata(
    environment,
    sessionTimestamp,
  )

  const depsOptimizer: DepsOptimizer = {
    init,
    metadata,
    registerMissingImport,
    run: () => debouncedProcessing(0),
    isOptimizedDepFile: createIsOptimizedDepFile(environment),
    isOptimizedDepUrl: createIsOptimizedDepUrl(environment),
    getOptimizedDepId: (depInfo: OptimizedDepInfo) =>
      `${depInfo.file}?v=${depInfo.browserHash}`,
    close,
    options,
  }

  let newDepsDiscovered = false

  let newDepsToLog: string[] = []
  let newDepsToLogHandle: NodeJS.Timeout | undefined
  const logNewlyDiscoveredDeps = () => {
    if (newDepsToLog.length) {
      const dependencyLabel =
        newDepsToLog.length === 1 ? 'dependency' : 'dependencies'
      logger.info(
        colors.green(
          `${dependencyLabel} optimized: ${depsLogString(newDepsToLog)}`,
        ),
        {
          timestamp: true,
        },
      )
      newDepsToLog = []
    }
  }

  let discoveredDepsWhileScanning: string[] = []
  const logOptimizeDepsIncludeSuggestion = (reason: string) => {
    if (discoveredDepsWhileScanning.length) {
      logger.info(
        colors.magenta(
          `tip: consider adding ${depsLogString(