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