302 lines
7.3 KiB
JavaScript
302 lines
7.3 KiB
JavaScript
'use strict'
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const fs = require('graceful-fs')
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const path = require('path')
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const assert = require('assert')
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const isWindows = (process.platform === 'win32')
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function defaults (options) {
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const methods = [
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'unlink',
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'chmod',
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'stat',
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'lstat',
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'rmdir',
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'readdir'
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]
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methods.forEach(m => {
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options[m] = options[m] || fs[m]
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m = m + 'Sync'
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options[m] = options[m] || fs[m]
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})
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options.maxBusyTries = options.maxBusyTries || 3
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}
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function rimraf (p, options, cb) {
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let busyTries = 0
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if (typeof options === 'function') {
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cb = options
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options = {}
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}
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assert(p, 'rimraf: missing path')
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assert.strictEqual(typeof p, 'string', 'rimraf: path should be a string')
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assert.strictEqual(typeof cb, 'function', 'rimraf: callback function required')
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assert(options, 'rimraf: invalid options argument provided')
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assert.strictEqual(typeof options, 'object', 'rimraf: options should be object')
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defaults(options)
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rimraf_(p, options, function CB (er) {
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if (er) {
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if ((er.code === 'EBUSY' || er.code === 'ENOTEMPTY' || er.code === 'EPERM') &&
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busyTries < options.maxBusyTries) {
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busyTries++
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const time = busyTries * 100
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// try again, with the same exact callback as this one.
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return setTimeout(() => rimraf_(p, options, CB), time)
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}
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// already gone
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if (er.code === 'ENOENT') er = null
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}
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cb(er)
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})
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}
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// Two possible strategies.
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// 1. Assume it's a file. unlink it, then do the dir stuff on EPERM or EISDIR
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// 2. Assume it's a directory. readdir, then do the file stuff on ENOTDIR
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//
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// Both result in an extra syscall when you guess wrong. However, there
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// are likely far more normal files in the world than directories. This
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// is based on the assumption that a the average number of files per
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// directory is >= 1.
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//
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// If anyone ever complains about this, then I guess the strategy could
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// be made configurable somehow. But until then, YAGNI.
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function rimraf_ (p, options, cb) {
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assert(p)
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assert(options)
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assert(typeof cb === 'function')
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// sunos lets the root user unlink directories, which is... weird.
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// so we have to lstat here and make sure it's not a dir.
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options.lstat(p, (er, st) => {
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if (er && er.code === 'ENOENT') {
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return cb(null)
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}
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// Windows can EPERM on stat. Life is suffering.
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if (er && er.code === 'EPERM' && isWindows) {
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return fixWinEPERM(p, options, er, cb)
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}
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if (st && st.isDirectory()) {
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return rmdir(p, options, er, cb)
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}
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options.unlink(p, er => {
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if (er) {
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if (er.code === 'ENOENT') {
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return cb(null)
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}
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if (er.code === 'EPERM') {
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return (isWindows)
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? fixWinEPERM(p, options, er, cb)
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: rmdir(p, options, er, cb)
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}
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if (er.code === 'EISDIR') {
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return rmdir(p, options, er, cb)
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}
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}
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return cb(er)
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})
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})
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}
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function fixWinEPERM (p, options, er, cb) {
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assert(p)
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assert(options)
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assert(typeof cb === 'function')
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options.chmod(p, 0o666, er2 => {
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if (er2) {
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cb(er2.code === 'ENOENT' ? null : er)
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} else {
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options.stat(p, (er3, stats) => {
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if (er3) {
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cb(er3.code === 'ENOENT' ? null : er)
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} else if (stats.isDirectory()) {
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rmdir(p, options, er, cb)
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} else {
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options.unlink(p, cb)
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}
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})
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}
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})
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}
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function fixWinEPERMSync (p, options, er) {
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let stats
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assert(p)
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assert(options)
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try {
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options.chmodSync(p, 0o666)
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} catch (er2) {
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if (er2.code === 'ENOENT') {
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return
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} else {
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throw er
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}
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}
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try {
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stats = options.statSync(p)
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} catch (er3) {
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if (er3.code === 'ENOENT') {
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return
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} else {
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throw er
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}
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}
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if (stats.isDirectory()) {
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rmdirSync(p, options, er)
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} else {
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options.unlinkSync(p)
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}
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}
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function rmdir (p, options, originalEr, cb) {
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assert(p)
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assert(options)
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assert(typeof cb === 'function')
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// try to rmdir first, and only readdir on ENOTEMPTY or EEXIST (SunOS)
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// if we guessed wrong, and it's not a directory, then
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// raise the original error.
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options.rmdir(p, er => {
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if (er && (er.code === 'ENOTEMPTY' || er.code === 'EEXIST' || er.code === 'EPERM')) {
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rmkids(p, options, cb)
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} else if (er && er.code === 'ENOTDIR') {
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cb(originalEr)
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} else {
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cb(er)
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}
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})
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}
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function rmkids (p, options, cb) {
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assert(p)
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assert(options)
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assert(typeof cb === 'function')
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options.readdir(p, (er, files) => {
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if (er) return cb(er)
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let n = files.length
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let errState
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if (n === 0) return options.rmdir(p, cb)
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files.forEach(f => {
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rimraf(path.join(p, f), options, er => {
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if (errState) {
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return
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}
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if (er) return cb(errState = er)
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if (--n === 0) {
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options.rmdir(p, cb)
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}
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})
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})
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})
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}
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// this looks simpler, and is strictly *faster*, but will
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// tie up the JavaScript thread and fail on excessively
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// deep directory trees.
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function rimrafSync (p, options) {
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let st
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options = options || {}
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defaults(options)
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assert(p, 'rimraf: missing path')
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assert.strictEqual(typeof p, 'string', 'rimraf: path should be a string')
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assert(options, 'rimraf: missing options')
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assert.strictEqual(typeof options, 'object', 'rimraf: options should be object')
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try {
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st = options.lstatSync(p)
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} catch (er) {
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if (er.code === 'ENOENT') {
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return
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}
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// Windows can EPERM on stat. Life is suffering.
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if (er.code === 'EPERM' && isWindows) {
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fixWinEPERMSync(p, options, er)
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}
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}
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try {
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// sunos lets the root user unlink directories, which is... weird.
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if (st && st.isDirectory()) {
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rmdirSync(p, options, null)
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} else {
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options.unlinkSync(p)
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}
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} catch (er) {
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if (er.code === 'ENOENT') {
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return
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} else if (er.code === 'EPERM') {
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return isWindows ? fixWinEPERMSync(p, options, er) : rmdirSync(p, options, er)
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} else if (er.code !== 'EISDIR') {
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throw er
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}
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rmdirSync(p, options, er)
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}
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}
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function rmdirSync (p, options, originalEr) {
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assert(p)
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assert(options)
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try {
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options.rmdirSync(p)
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} catch (er) {
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if (er.code === 'ENOTDIR') {
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throw originalEr
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} else if (er.code === 'ENOTEMPTY' || er.code === 'EEXIST' || er.code === 'EPERM') {
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rmkidsSync(p, options)
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} else if (er.code !== 'ENOENT') {
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throw er
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}
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}
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}
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function rmkidsSync (p, options) {
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assert(p)
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assert(options)
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options.readdirSync(p).forEach(f => rimrafSync(path.join(p, f), options))
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if (isWindows) {
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// We only end up here once we got ENOTEMPTY at least once, and
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// at this point, we are guaranteed to have removed all the kids.
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// So, we know that it won't be ENOENT or ENOTDIR or anything else.
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// try really hard to delete stuff on windows, because it has a
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// PROFOUNDLY annoying habit of not closing handles promptly when
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// files are deleted, resulting in spurious ENOTEMPTY errors.
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const startTime = Date.now()
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do {
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try {
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const ret = options.rmdirSync(p, options)
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return ret
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} catch {}
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} while (Date.now() - startTime < 500) // give up after 500ms
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} else {
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const ret = options.rmdirSync(p, options)
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return ret
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}
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}
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module.exports = rimraf
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rimraf.sync = rimrafSync
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