Function getRpdCache

packages/vite/src/node/packages.ts:298–313

* Get cached `resolvePackageData` value based on `basedir`. When one is found, * and we've already traversed some directories between `basedir` and `originalBasedir`, * we cache the value for those in-between directories as well. * * This makes it so the fs is only read once for a shared `basedi

(
  packageCache: PackageCache,
  pkgName: string,
  basedir: string,
  originalBasedir: string,
  preserveSymlinks: boolean,
)

 * This makes it so the fs is only read once for a shared `basedir`.
 */
function getRpdCache(
  packageCache: PackageCache,
  pkgName: string,
  basedir: string,
  originalBasedir: string,
  preserveSymlinks: boolean,
) {
  const cacheKey = getRpdCacheKey(pkgName, basedir, preserveSymlinks)
  const pkgData = packageCache.get(cacheKey)
  if (pkgData) {
    traverseBetweenDirs(originalBasedir, basedir, (dir) => {
      packageCache.set(getRpdCacheKey(pkgName, dir, preserveSymlinks), pkgData)
    })
    return pkgData
  }
}

function setRpdCache(
  packageCache: PackageCache,