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