parseDepsOptimizerMetadata() — vite Function Reference

Source Code

packages/vite/src/node/optimizer/index.ts lines 993–1039

function parseDepsOptimizerMetadata(
  jsonMetadata: string,
  depsCacheDir: string,
): DepOptimizationMetadata | undefined {
  const { hash, lockfileHash, configHash, browserHash, optimized, chunks } =
    JSON.parse(jsonMetadata, (key: string, value: string) => {
      // Paths can be absolute or relative to the deps cache dir where
      // the _metadata.json is located
      if (key === 'file' || key === 'src') {
        return normalizePath(path.resolve(depsCacheDir, value))
      }
      return value
    })
  if (
    !chunks ||
    Object.values(optimized).some((depInfo: any) => !depInfo.fileHash)
  ) {
    // outdated _metadata.json version, ignore
    return
  }
  const metadata = {
    hash,
    lockfileHash,
    configHash,
    browserHash,
    optimized: {},
    discovered: {},
    chunks: {},
    depInfoList: [],
  }
  for (const id of Object.keys(optimized)) {
    addOptimizedDepInfo(metadata, 'optimized', {
      ...optimized[id],
      id,
      browserHash,
    })
  }
  for (const id of Object.keys(chunks)) {
    addOptimizedDepInfo(metadata, 'chunks', {
      ...chunks[id],
      id,
      browserHash,
      needsInterop: false,
    })
  }
  return metadata
}