let the filter option be async for async methods

README.md

@@ -79,13 +79,17 @@ Options:
 
 - `filter` Method that receives a path string as an argument, and
   returns a boolean indicating whether that path should be
-  deleted.
-
-  If a filter method is provided, it _must_ return a truthy
-  value, or nothing will be removed. Filtering out a directory
-  will still allow its children to be removed, unless they are
-  also filtered out, but any parents of a filtered entry will not
-  be removed.
+  deleted.  With async rimraf methods, this may return a Promise
+  that resolves to a boolean.  (Since Promises are truthy,
+  returning a Promise from a sync filter is the same as just not
+  filtering anything.)
+
+  If a filter method is provided, it will _only_ remove entries
+  if the filter returns (or resolves to) a truthy value. Omitting
+  a directory will still allow its children to be removed, unless
+  they are also filtered out, but any parents of a filtered entry
+  will not be removed, since the directory would not be empty in
+  that case.
 
   Using a filter method prevents the use of Node's built-in
   `fs.rm` because that implementation does not support filtering.

src/index.ts

@@ -1,9 +1,9 @@
-import optArg from './opt-arg.js'
+import { optArg, optArgSync } from './opt-arg.js'
 import pathArg from './path-arg.js'
 
 import { glob, GlobOptions, globSync } from 'glob'
 
-export interface RimrafOptions {
+export interface RimrafAsyncOptions {
   preserveRoot?: boolean
   tmp?: string
   maxRetries?: number
@@ -12,9 +12,15 @@ export interface RimrafOptions {
   maxBackoff?: number
   signal?: AbortSignal
   glob?: boolean | GlobOptions
+  filter?: ((path: string) => boolean) | ((path: string) => Promise<boolean>)
+}
+
+export interface RimrafSyncOptions extends RimrafAsyncOptions {
   filter?: (path: string) => boolean
 }
 
+export type RimrafOptions = RimrafSyncOptions | RimrafAsyncOptions
+
 const typeOrUndef = (val: any, t: string) =>
   typeof val === 'undefined' || typeof val === t
 
@@ -46,8 +52,11 @@ import { rimrafWindows, rimrafWindowsSync } from './rimraf-windows.js'
 import { useNative, useNativeSync } from './use-native.js'
 
 const wrap =
-  (fn: (p: string, o: RimrafOptions) => Promise<boolean>) =>
-  async (path: string | string[], opt?: RimrafOptions): Promise<boolean> => {
+  (fn: (p: string, o: RimrafAsyncOptions) => Promise<boolean>) =>
+  async (
+    path: string | string[],
+    opt?: RimrafAsyncOptions
+  ): Promise<boolean> => {
     const options = optArg(opt)
     if (options.glob) {
       path = await glob(path, options.glob)
@@ -62,9 +71,9 @@ const wrap =
   }
 
 const wrapSync =
-  (fn: (p: string, o: RimrafOptions) => boolean) =>
-  (path: string | string[], opt?: RimrafOptions): boolean => {
-    const options = optArg(opt)
+  (fn: (p: string, o: RimrafSyncOptions) => boolean) =>
+  (path: string | string[], opt?: RimrafSyncOptions): boolean => {
+    const options = optArgSync(opt)
     if (options.glob) {
       path = globSync(path, options.glob)
     }

src/opt-arg.ts

@@ -1,13 +1,23 @@
 import { GlobOptions } from 'glob'
-import { assertRimrafOptions, RimrafOptions } from './index.js'
-export default (
-  opt: RimrafOptions = {}
-): RimrafOptions & {
-  glob?: GlobOptions & { withFileTypes: false }
-} => {
+import {
+  assertRimrafOptions,
+  RimrafAsyncOptions,
+  RimrafOptions,
+  RimrafSyncOptions,
+} from './index.js'
+
+const optArgT = <T extends RimrafOptions>(
+  opt: T
+):
+  | (T & {
+      glob: GlobOptions & { withFileTypes: false }
+    })
+  | (T & { glob: undefined }) => {
   assertRimrafOptions(opt)
   const { glob, ...options } = opt
-  if (!glob) return options
+  if (!glob) {
+    return options as T & { glob: undefined }
+  }
   const globOpt =
     glob === true
       ? opt.signal
@@ -28,5 +38,8 @@ export default (
       absolute: true,
       withFileTypes: false,
     },
-  }
+  } as T & { glob: GlobOptions & { withFileTypes: false } }
 }
+
+export const optArg = (opt: RimrafAsyncOptions = {}) => optArgT(opt)
+export const optArgSync = (opt: RimrafSyncOptions = {}) => optArgT(opt)

src/path-arg.ts

@@ -1,9 +1,9 @@
-import platform from './platform.js'
-import { resolve, parse } from 'path'
+import { parse, resolve } from 'path'
 import { inspect } from 'util'
-import { RimrafOptions } from './index.js'
+import { RimrafAsyncOptions } from './index.js'
+import platform from './platform.js'
 
-const pathArg = (path: string, opt: RimrafOptions = {}) => {
+const pathArg = (path: string, opt: RimrafAsyncOptions = {}) => {
   const type = typeof path
   if (type !== 'string') {
     const ctor = path && type === 'object' && path.constructor

src/retry-busy.ts

@@ -1,6 +1,6 @@
 // note: max backoff is the maximum that any *single* backoff will do
 
-import { RimrafOptions } from '.'
+import { RimrafAsyncOptions, RimrafOptions } from '.'
 
 export const MAXBACKOFF = 200
 export const RATE = 1.2
@@ -10,7 +10,7 @@ export const codes = new Set(['EMFILE', 'ENFILE', 'EBUSY'])
 export const retryBusy = (fn: (path: string) => Promise<any>) => {
   const method = async (
     path: string,
-    opt: RimrafOptions,
+    opt: RimrafAsyncOptions,
     backoff = 1,
     total = 0
   ) => {

src/rimraf-move-remove.ts

@@ -25,7 +25,7 @@ import {
 } from './fs.js'
 const { rename, unlink, rmdir, chmod } = fsPromises
 
-import { RimrafOptions } from '.'
+import { RimrafAsyncOptions, RimrafSyncOptions } from '.'
 import { readdirOrError, readdirOrErrorSync } from './readdir-or-error.js'
 
 // crypto.randomBytes is much slower, and Math.random() is enough here
@@ -71,7 +71,7 @@ const unlinkFixEPERMSync = (path: string) => {
 
 export const rimrafMoveRemove = async (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafAsyncOptions
 ): Promise<boolean> => {
   if (opt?.signal?.aborted) {
     throw opt.signal.reason
@@ -91,7 +91,7 @@ export const rimrafMoveRemove = async (
     if (entries.code !== 'ENOTDIR') {
       throw entries
     }
-    if (opt.filter && !opt.filter(path)) {
+    if (opt.filter && !(await opt.filter(path))) {
       return false
     }
     await ignoreENOENT(tmpUnlink(path, opt.tmp, unlinkFixEPERM))
@@ -113,7 +113,7 @@ export const rimrafMoveRemove = async (
   if (opt.preserveRoot === false && path === parse(path).root) {
     return false
   }
-  if (opt.filter && !opt.filter(path)) {
+  if (opt.filter && !(await opt.filter(path))) {
     return false
   }
   await ignoreENOENT(tmpUnlink(path, opt.tmp, rmdir))
@@ -132,7 +132,7 @@ const tmpUnlink = async (
 
 export const rimrafMoveRemoveSync = (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafSyncOptions
 ): boolean => {
   if (opt?.signal?.aborted) {
     throw opt.signal.reason

src/rimraf-native.ts

@@ -1,10 +1,10 @@
-import { RimrafOptions } from '.'
+import { RimrafAsyncOptions, RimrafSyncOptions } from '.'
 import { promises, rmSync } from './fs.js'
 const { rm } = promises
 
 export const rimrafNative = async (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafAsyncOptions
 ): Promise<boolean> => {
   await rm(path, {
     ...opt,
@@ -14,7 +14,10 @@ export const rimrafNative = async (
   return true
 }
 
-export const rimrafNativeSync = (path: string, opt: RimrafOptions): boolean => {
+export const rimrafNativeSync = (
+  path: string,
+  opt: RimrafSyncOptions
+): boolean => {
   rmSync(path, {
     ...opt,
     force: true,

src/rimraf-posix.ts

@@ -12,12 +12,12 @@ import { parse, resolve } from 'path'
 
 import { readdirOrError, readdirOrErrorSync } from './readdir-or-error.js'
 
-import { RimrafOptions } from '.'
+import { RimrafAsyncOptions, RimrafSyncOptions } from '.'
 import { ignoreENOENT, ignoreENOENTSync } from './ignore-enoent.js'
 
 export const rimrafPosix = async (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafAsyncOptions
 ): Promise<boolean> => {
   if (opt?.signal?.aborted) {
     throw opt.signal.reason
@@ -30,7 +30,7 @@ export const rimrafPosix = async (
     if (entries.code !== 'ENOTDIR') {
       throw entries
     }
-    if (opt.filter && !opt.filter(path)) {
+    if (opt.filter && !(await opt.filter(path))) {
       return false
     }
     await ignoreENOENT(unlink(path))
@@ -54,15 +54,18 @@ export const rimrafPosix = async (
     return false
   }
 
-  if (opt.filter && !opt.filter(path)) {
+  if (opt.filter && !(await opt.filter(path))) {
     return false
   }
 
   await ignoreENOENT(rmdir(path))
   return true
 }
 
-export const rimrafPosixSync = (path: string, opt: RimrafOptions): boolean => {
+export const rimrafPosixSync = (
+  path: string,
+  opt: RimrafSyncOptions
+): boolean => {
   if (opt?.signal?.aborted) {
     throw opt.signal.reason
   }
@@ -84,11 +87,11 @@ export const rimrafPosixSync = (path: string, opt: RimrafOptions): boolean => {
   for (const entry of entries) {
     removedAll = rimrafPosixSync(resolve(path, entry), opt) && removedAll
   }
-  if (!removedAll) {
+  if (opt.preserveRoot === false && path === parse(path).root) {
     return false
   }
 
-  if (opt.preserveRoot === false && path === parse(path).root) {
+  if (!removedAll) {
     return false
   }
 

src/rimraf-windows.ts

@@ -9,7 +9,7 @@
 // Note: "move then remove" is 2-10 times slower, and just as unreliable.
 
 import { parse, resolve } from 'path'
-import { RimrafOptions } from '.'
+import { RimrafAsyncOptions, RimrafSyncOptions } from '.'
 import { fixEPERM, fixEPERMSync } from './fix-eperm.js'
 import { promises, rmdirSync, unlinkSync } from './fs.js'
 import { ignoreENOENT, ignoreENOENTSync } from './ignore-enoent.js'
@@ -25,7 +25,7 @@ const rimrafWindowsDirSync = retryBusySync(fixEPERMSync(rmdirSync))
 
 const rimrafWindowsDirMoveRemoveFallback = async (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafAsyncOptions
 ): Promise<boolean> => {
   /* c8 ignore start */
   if (opt?.signal?.aborted) {
@@ -46,7 +46,7 @@ const rimrafWindowsDirMoveRemoveFallback = async (
 
 const rimrafWindowsDirMoveRemoveFallbackSync = (
   path: string,
-  opt: RimrafOptions
+  opt: RimrafSyncOptions
 ): boolean => {
   if (opt?.signal?.aborted) {
     throw opt.signal.reason
@@ -71,7 +71,7 @@ const states = new Set([START, CHILD, FINISH])
 
 export const rimrafWindows = async (
   path: string,
-  opt: RimrafOptions,
+  opt: RimrafAsyncOptions,
   state = START
 ): Promise<boolean> => {
   if (opt?.signal?.aborted) {
@@ -89,7 +89,7 @@ export const rimrafWindows = async (
     if (entries.code !== 'ENOTDIR') {
       throw entries
     }
-    if (opt.filter && !opt.filter(path)) {
+    if (opt.filter && !(await opt.filter(path))) {
       return false
     }
     // is a file
@@ -110,10 +110,10 @@ export const rimrafWindows = async (
     if (opt.preserveRoot === false && path === parse(path).root) {
       return false
     }
-    if (opt.filter && !opt.filter(path)) {
+    if (!removedAll) {
       return false
     }
-    if (!removedAll) {
+    if (opt.filter && !(await opt.filter(path))) {
       return false
     }
     await ignoreENOENT(rimrafWindowsDirMoveRemoveFallback(path, opt))
@@ -123,7 +123,7 @@ export const rimrafWindows = async (
 
 export const rimrafWindowsSync = (
   path: string,
-  opt: RimrafOptions,
+  opt: RimrafSyncOptions,
   state = START
 ): boolean => {
   if (!states.has(state)) {
@@ -158,10 +158,10 @@ export const rimrafWindowsSync = (
     if (opt.preserveRoot === false && path === parse(path).root) {
       return false
     }
-    if (opt.filter && !opt.filter(path)) {
+    if (!removedAll) {
       return false
     }
-    if (!removedAll) {
+    if (opt.filter && !opt.filter(path)) {
       return false
     }
     ignoreENOENTSync(() => {

src/use-native.ts

@@ -1,11 +1,11 @@
 const version = process.env.__TESTING_RIMRAF_NODE_VERSION__ || process.version
 const versArr = version.replace(/^v/, '').split('.')
 const hasNative = +versArr[0] > 14 || (+versArr[0] === 14 && +versArr[1] >= 14)
-import { RimrafOptions } from './index.js'
+import { RimrafAsyncOptions, RimrafOptions } from './index.js'
 // we do NOT use native by default on Windows, because Node's native
 // rm implementation is less advanced.  Change this code if that changes.
 import platform from './platform.js'
-export const useNative: (opt?: RimrafOptions) => boolean =
+export const useNative: (opt?: RimrafAsyncOptions) => boolean =
   !hasNative || platform === 'win32'
     ? () => false
     : opt => !opt?.signal && !opt?.filter