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