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const assert = require("assert")
const path = require("path")
const fs = require("fs")
let glob = undefined
try {
glob = require("glob")
} catch (_err) {
// treat glob as optional.
}
const defaultGlobOpts = {
nosort: true,
silent: true
}
// for EMFILE handling
let timeout = 0
const isWindows = (process.platform === "win32")
const 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
options.emfileWait = options.emfileWait || 1000
if (options.glob === false) {
options.disableGlob = true
}
if (options.disableGlob !== true && glob === undefined) {
throw Error('glob dependency not found, set `options.disableGlob = true` if intentional')
}
options.disableGlob = options.disableGlob || false
options.glob = options.glob || defaultGlobOpts
}
const rimraf = (p, options, cb) => {
if (typeof options === 'function') {
cb = options
options = {}
}
assert(p, 'rimraf: missing path')
assert.equal(typeof p, 'string', 'rimraf: path should be a string')
assert.equal(typeof cb, 'function', 'rimraf: callback function required')
assert(options, 'rimraf: invalid options argument provided')
assert.equal(typeof options, 'object', 'rimraf: options should be object')
defaults(options)
let busyTries = 0
let errState = null
let n = 0
const next = (er) => {
errState = errState || er
if (--n === 0)
cb(errState)
}
const afterGlob = (er, results) => {
if (er)
return cb(er)
n = results.length
if (n === 0)
return cb()
results.forEach(p => {
const CB = (er) => {
if (er) {
if ((er.code === "EBUSY" || er.code === "ENOTEMPTY" || er.code === "EPERM") &&
busyTries < options.maxBusyTries) {
busyTries ++
// try again, with the same exact callback as this one.
return setTimeout(() => rimraf_(p, options, CB), busyTries * 100)
}
// this one won't happen if graceful-fs is used.
if (er.code === "EMFILE" && timeout < options.emfileWait) {
return setTimeout(() => rimraf_(p, options, CB), timeout ++)
}
// already gone
if (er.code === "ENOENT") er = null
}
timeout = 0
next(er)
}
rimraf_(p, options, CB)
})
}
if (options.disableGlob || !glob.hasMagic(p))
return afterGlob(null, [p])
options.lstat(p, (er, stat) => {
if (!er)
return afterGlob(null, [p])
glob(p, options.glob, afterGlob)
})
}
// 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.
const 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)
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)
})
})
}
const fixWinEPERM = (p, options, er, cb) => {
assert(p)
assert(options)
assert(typeof cb === 'function')
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)
})
})
}
const fixWinEPERMSync = (p, options, er) => {
assert(p)
assert(options)
try {
options.chmodSync(p, 0o666)
} catch (er2) {
if (er2.code === "ENOENT")
return
else
throw er
}
let stats
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)
}
const rmdir = (p, options, originalEr, cb) => {
assert(p)
assert(options)
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)
})
}
const 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
if (n === 0)
return options.rmdir(p, cb)
let errState
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.
const rimrafSync = (p, options) => {
options = options || {}
defaults(options)
assert(p, 'rimraf: missing path')
assert.equal(typeof p, 'string', 'rimraf: path should be a string')
assert(options, 'rimraf: missing options')
assert.equal(typeof options, 'object', 'rimraf: options should be object')
let results
if (options.disableGlob || !glob.hasMagic(p)) {
results = [p]
} else {
try {
options.lstatSync(p)
results = [p]
} catch (er) {
results = glob.sync(p, options.glob)
}
}
if (!results.length)
return
for (let i = 0; i < results.length; i++) {
const p = results[i]
let st
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
if (er.code === "EPERM")
return isWindows ? fixWinEPERMSync(p, options, er) : rmdirSync(p, options, er)
if (er.code !== "EISDIR")
throw er
rmdirSync(p, options, er)
}
}
}
const rmdirSync = (p, options, originalEr) => {
assert(p)
assert(options)
try {
options.rmdirSync(p)
} catch (er) {
if (er.code === "ENOENT")
return
if (er.code === "ENOTDIR")
throw originalEr
if (er.code === "ENOTEMPTY" || er.code === "EEXIST" || er.code === "EPERM")
rmkidsSync(p, options)
}
}
const rmkidsSync = (p, options) => {
assert(p)
assert(options)
options.readdirSync(p).forEach(f => rimrafSync(path.join(p, f), options))
// 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 retries = isWindows ? 100 : 1
let i = 0
do {
let threw = true
try {
const ret = options.rmdirSync(p, options)
threw = false
return ret
} finally {
if (++i < retries && threw)
continue
}
} while (true)
}
module.exports = rimraf
rimraf.sync = rimrafSync