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112 lines
3.1 KiB
112 lines
3.1 KiB
var assert = require('assert')
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var dirname = require('path').dirname
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var resolve = require('path').resolve
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var isInside = require('path-is-inside')
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var rimraf = require('rimraf')
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var lstat = require('graceful-fs').lstat
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var readdir = require('graceful-fs').readdir
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var rmdir = require('graceful-fs').rmdir
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var unlink = require('graceful-fs').unlink
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module.exports = vacuum
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function vacuum (leaf, options, cb) {
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assert(typeof leaf === 'string', 'must pass in path to remove')
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assert(typeof cb === 'function', 'must pass in callback')
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if (!options) options = {}
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assert(typeof options === 'object', 'options must be an object')
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var log = options.log ? options.log : function () {}
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leaf = leaf && resolve(leaf)
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var base = options.base && resolve(options.base)
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if (base && !isInside(leaf, base)) {
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return cb(new Error(leaf + ' is not a child of ' + base))
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}
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lstat(leaf, function (error, stat) {
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if (error) {
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if (error.code === 'ENOENT') return cb(null)
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log(error.stack)
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return cb(error)
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}
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if (!(stat && (stat.isDirectory() || stat.isSymbolicLink() || stat.isFile()))) {
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log(leaf, 'is not a directory, file, or link')
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return cb(new Error(leaf + ' is not a directory, file, or link'))
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}
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if (options.purge) {
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log('purging', leaf)
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rimraf(leaf, function (error) {
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if (error) return cb(error)
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next(dirname(leaf))
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})
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} else if (!stat.isDirectory()) {
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log('removing', leaf)
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unlink(leaf, function (error) {
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if (error) return cb(error)
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next(dirname(leaf))
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})
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} else {
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next(leaf)
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}
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})
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function next (branch) {
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branch = branch && resolve(branch)
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// either we've reached the base or we've reached the root
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if ((base && branch === base) || branch === dirname(branch)) {
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log('finished vacuuming up to', branch)
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return cb(null)
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}
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readdir(branch, function (error, files) {
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if (error) {
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if (error.code === 'ENOENT') return cb(null)
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log('unable to check directory', branch, 'due to', error.message)
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return cb(error)
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}
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if (files.length > 0) {
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log('quitting because other entries in', branch)
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return cb(null)
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}
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log('removing', branch)
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lstat(branch, function (error, stat) {
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if (error) {
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if (error.code === 'ENOENT') return cb(null)
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log('unable to lstat', branch, 'due to', error.message)
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return cb(error)
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}
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var remove = stat.isDirectory() ? rmdir : unlink
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remove(branch, function (error) {
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if (error) {
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if (error.code === 'ENOENT') {
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log('quitting because lost the race to remove', branch)
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return cb(null)
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}
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if (error.code === 'ENOTEMPTY' || error.code === 'EEXIST') {
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log('quitting because new (racy) entries in', branch)
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return cb(null)
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}
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log('unable to remove', branch, 'due to', error.message)
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return cb(error)
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}
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next(dirname(branch))
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})
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})
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})
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}
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}
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