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https://youtu.be/uhRWMGBjlO8?t=537\n//\n// 1. readdir\n// 2. for each entry\n//   a. if a non-empty directory, recurse\n//   b. if an empty directory, move to random hidden file name in $TEMP\n//   c. unlink/rmdir $TEMP\n//\n// This works around the fact that unlink/rmdir is non-atomic and takes\n// a non-deterministic amount of time to complete.\n//\n// However, it is HELLA SLOW, like 2-10x slower than a naive recursive rm.\n\nimport { basename, parse, resolve } from 'path'\nimport { defaultTmp, defaultTmpSync } from './default-tmp.js'\n\nimport { ignoreENOENT, ignoreENOENTSync } from './ignore-enoent.js'\n\nimport {\n  chmodSync,\n  lstatSync,\n  promises as fsPromises,\n  renameSync,\n  rmdirSync,\n  unlinkSync,\n} from './fs.js'\nconst { lstat, rename, unlink, rmdir, chmod } = fsPromises\n\nimport { Dirent, Stats } from 'fs'\nimport { RimrafAsyncOptions, RimrafSyncOptions } from './index.js'\nimport { readdirOrError, readdirOrErrorSync } from './readdir-or-error.js'\n\n// crypto.randomBytes is much slower, and Math.random() is enough here\nconst uniqueFilename = (path: string) => `.${basename(path)}.${Math.random()}`\n\nconst unlinkFixEPERM = async (path: string) =>\n  unlink(path).catch((er: Error & { code?: string }) => {\n    if (er.code === 'EPERM') {\n      return chmod(path, 0o666).then(\n        () => unlink(path),\n        er2 => {\n          if (er2.code === 'ENOENT') {\n            return\n          }\n          throw er\n        },\n      )\n    } else if (er.code === 'ENOENT') {\n      return\n    }\n    throw er\n  })\n\nconst unlinkFixEPERMSync = (path: string) => {\n  try {\n    unlinkSync(path)\n  } catch (er) {\n    if ((er as NodeJS.ErrnoException)?.code === 'EPERM') {\n      try {\n        return chmodSync(path, 0o666)\n      } catch (er2) {\n        if ((er2 as NodeJS.ErrnoException)?.code === 'ENOENT') {\n          return\n        }\n        throw er\n      }\n    } else if ((er as NodeJS.ErrnoException)?.code === 'ENOENT') {\n      return\n    }\n    throw er\n  }\n}\n\nexport const rimrafMoveRemove = async (\n  path: string,\n  opt: RimrafAsyncOptions,\n) => {\n  if (opt?.signal?.aborted) {\n    throw opt.signal.reason\n  }\n  try {\n    return await rimrafMoveRemoveDir(path, opt, await lstat(path))\n  } catch (er) {\n    if ((er as NodeJS.ErrnoException)?.code === 'ENOENT') return true\n    throw er\n  }\n}\n\nconst rimrafMoveRemoveDir = async (\n  path: string,\n  opt: RimrafAsyncOptions,\n  ent: Dirent | Stats,\n): Promise<boolean> => {\n  if (opt?.signal?.aborted) {\n    throw opt.signal.reason\n  }\n  if (!opt.tmp) {\n    return rimrafMoveRemoveDir(\n      path,\n      { ...opt, tmp: await defaultTmp(path) },\n      ent,\n    )\n  }\n  if (path === opt.tmp && parse(path).root !== path) {\n    throw new Error('cannot delete temp directory used for deletion')\n  }\n\n  const entries = ent.isDirectory() ? await readdirOrError(path) : null\n  if (!Array.isArray(entries)) {\n    // this can only happen if lstat/readdir lied, or if the dir was\n    // swapped out with a file at just the right moment.\n    /* c8 ignore start */\n    if (entries) {\n      if (entries.code === 'ENOENT') {\n        return true\n      }\n      if (entries.code !== 'ENOTDIR') {\n        throw entries\n      }\n    }\n    /* c8 ignore stop */\n    if (opt.filter && !(await opt.filter(path, ent))) {\n      return false\n    }\n    await ignoreENOENT(tmpUnlink(path, opt.tmp, unlinkFixEPERM))\n    return true\n  }\n\n  const removedAll = (\n    await Promise.all(\n      entries.map(ent =>\n        rimrafMoveRemoveDir(resolve(path, ent.name), opt, ent),\n      ),\n    )\n  ).reduce((a, b) => a && b, true)\n  if (!removedAll) {\n    return false\n  }\n\n  // we don't ever ACTUALLY try to unlink /, because that can never work\n  // but when preserveRoot is false, we could be operating on it.\n  // No need to check if preserveRoot is not false.\n  if (opt.preserveRoot === false && path === parse(path).root) {\n    return false\n  }\n  if (opt.filter && !(await opt.filter(path, ent))) {\n    return false\n  }\n  await ignoreENOENT(tmpUnlink(path, opt.tmp, rmdir))\n  return true\n}\n\nconst tmpUnlink = async (\n  path: string,\n  tmp: string,\n  rm: (p: string) => Promise<any>,\n) => {\n  const tmpFile = resolve(tmp, uniqueFilename(path))\n  await rename(path, tmpFile)\n  return await rm(tmpFile)\n}\n\nexport const rimrafMoveRemoveSync = (path: string, opt: RimrafSyncOptions) => {\n  if (opt?.signal?.aborted) {\n    throw opt.signal.reason\n  }\n  try {\n    return rimrafMoveRemoveDirSync(path, opt, lstatSync(path))\n  } catch (er) {\n    if ((er as NodeJS.ErrnoException)?.code === 'ENOENT') return true\n    throw er\n  }\n}\n\nconst rimrafMoveRemoveDirSync = (\n  path: string,\n  opt: RimrafSyncOptions,\n  ent: Dirent | Stats,\n): boolean => {\n  if (opt?.signal?.aborted) {\n    throw opt.signal.reason\n  }\n  if (!opt.tmp) {\n    return rimrafMoveRemoveDirSync(\n      path,\n      { ...opt, tmp: defaultTmpSync(path) },\n      ent,\n    )\n  }\n  const tmp: string = opt.tmp\n\n  if (path === opt.tmp && parse(path).root !== path) {\n    throw new Error('cannot delete temp directory used for deletion')\n  }\n\n  const entries = ent.isDirectory() ? readdirOrErrorSync(path) : null\n  if (!Array.isArray(entries)) {\n    // this can only happen if lstat/readdir lied, or if the dir was\n    // swapped out with a file at just the right moment.\n    /* c8 ignore start */\n    if (entries) {\n      if (entries.code === 'ENOENT') {\n        return true\n      }\n      if (entries.code !== 'ENOTDIR') {\n        throw entries\n      }\n    }\n    /* c8 ignore stop */\n    if (opt.filter && !opt.filter(path, ent)) {\n      return false\n    }\n    ignoreENOENTSync(() => tmpUnlinkSync(path, tmp, unlinkFixEPERMSync))\n    return true\n  }\n\n  let removedAll = true\n  for (const ent of entries) {\n    const p = resolve(path, ent.name)\n    removedAll = rimrafMoveRemoveDirSync(p, opt, ent) && removedAll\n  }\n  if (!removedAll) {\n    return false\n  }\n  if (opt.preserveRoot === false && path === parse(path).root) {\n    return false\n  }\n  if (opt.filter && !opt.filter(path, ent)) {\n    return false\n  }\n  ignoreENOENTSync(() => tmpUnlinkSync(path, tmp, rmdirSync))\n  return true\n}\n\nconst tmpUnlinkSync = (\n  path: string,\n  tmp: string,\n  rmSync: (p: string) => void,\n) => {\n  const tmpFile = resolve(tmp, uniqueFilename(path))\n  renameSync(path, tmpFile)\n  return rmSync(tmpFile)\n}\n"]}