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'use strict'
// most of this code was written by Andrew Kelley
// licensed under the BSD license: see
// https://github.com/andrewrk/node-mv/blob/master/package.json
// this needs a cleanup
const u = require('universalify').fromCallback
const fs = require('graceful-fs')
const copy = require('../copy/copy')
const path = require('path')
const remove = require('../remove').remove
const mkdirp = require('../mkdirs').mkdirs
function move (src, dest, options, callback) {
if (typeof options === 'function') {
callback = options
options = {}
}
const overwrite = options.overwrite || options.clobber || false
isSrcSubdir(src, dest, (err, itIs) => {
if (err) return callback(err)
if (itIs) return callback(new Error(`Cannot move '${src}' to a subdirectory of itself, '${dest}'.`))
mkdirp(path.dirname(dest), err => {
if (err) return callback(err)
doRename()
})
})
function doRename () {
if (path.resolve(src) === path.resolve(dest)) {
fs.access(src, callback)
} else if (overwrite) {
fs.rename(src, dest, err => {
if (!err) return callback()
if (err.code === 'ENOTEMPTY' || err.code === 'EEXIST') {
remove(dest, err => {
if (err) return callback(err)
options.overwrite = false // just overwriteed it, no need to do it again
move(src, dest, options, callback)
})
return
}
// weird Windows shit
if (err.code === 'EPERM') {
setTimeout(() => {
remove(dest, err => {
if (err) return callback(err)
options.overwrite = false
move(src, dest, options, callback)
})
}, 200)
return
}
if (err.code !== 'EXDEV') return callback(err)
moveAcrossDevice(src, dest, overwrite, callback)
})
} else {
fs.link(src, dest, err => {
if (err) {
if (err.code === 'EXDEV' || err.code === 'EISDIR' || err.code === 'EPERM' || err.code === 'ENOTSUP') {
return moveAcrossDevice(src, dest, overwrite, callback)
}
return callback(err)
}
return fs.unlink(src, callback)
})
}
}
}
function moveAcrossDevice (src, dest, overwrite, callback) {
fs.stat(src, (err, stat) => {
if (err) return callback(err)
if (stat.isDirectory()) {
moveDirAcrossDevice(src, dest, overwrite, callback)
} else {
moveFileAcrossDevice(src, dest, overwrite, callback)
}
})
}
function moveFileAcrossDevice (src, dest, overwrite, callback) {
const flags = overwrite ? 'w' : 'wx'
const ins = fs.createReadStream(src)
const outs = fs.createWriteStream(dest, { flags })
ins.on('error', err => {
ins.destroy()
outs.destroy()
outs.removeListener('close', onClose)
// may want to create a directory but `out` line above
// creates an empty file for us: See #108
// don't care about error here
fs.unlink(dest, () => {
// note: `err` here is from the input stream errror
if (err.code === 'EISDIR' || err.code === 'EPERM') {
moveDirAcrossDevice(src, dest, overwrite, callback)
} else {
callback(err)
}
})
})
outs.on('error', err => {
ins.destroy()
outs.destroy()
outs.removeListener('close', onClose)
callback(err)
})
outs.once('close', onClose)
ins.pipe(outs)
function onClose () {
fs.unlink(src, callback)
}
}
function moveDirAcrossDevice (src, dest, overwrite, callback) {
const options = {
overwrite: false
}
if (overwrite) {
remove(dest, err => {
if (err) return callback(err)
startCopy()
})
} else {
startCopy()
}
function startCopy () {
copy(src, dest, options, err => {
if (err) return callback(err)
remove(src, callback)
})
}
}
// return true if dest is a subdir of src, otherwise false.
// extract dest base dir and check if that is the same as src basename
function isSrcSubdir (src, dest, cb) {
fs.stat(src, (err, st) => {
if (err) return cb(err)
if (st.isDirectory()) {
const baseDir = dest.split(path.dirname(src) + path.sep)[1]
if (baseDir) {
const destBasename = baseDir.split(path.sep)[0]
if (destBasename) return cb(null, src !== dest && dest.indexOf(src) > -1 && destBasename === path.basename(src))
return cb(null, false)
}
return cb(null, false)
}
return cb(null, false)
})
}
module.exports = {
move: u(move)
}
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