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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") {
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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