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'use strict'
module.exports = copy
module.exports.item = copyItem
module.exports.recurse = recurseDir
module.exports.symlink = copySymlink
module.exports.file = copyFile
var nodeFs = require('fs')
var path = require('path')
var validate = require('aproba')
var stockWriteStreamAtomic = require('fs-write-stream-atomic')
var mkdirp = require('mkdirp')
var rimraf = require('rimraf')
var isWindows = require('./is-windows')
var RunQueue = require('run-queue')
var extend = Object.assign || require('util')._extend
function promisify (Promise, fn) {
return function () {
var args = [].slice.call(arguments)
return new Promise(function (resolve, reject) {
return fn.apply(null, args.concat(function (err, value) {
if (err) {
reject(err)
} else {
resolve(value)
}
}))
})
}
}
function copy (from, to, opts) {
validate('SSO|SS', arguments)
opts = extend({}, opts || {})
var Promise = opts.Promise || global.Promise
var fs = opts.fs || nodeFs
if (opts.isWindows == null) opts.isWindows = isWindows
if (!opts.Promise) opts.Promise = Promise
if (!opts.fs) opts.fs = fs
if (!opts.recurseWith) opts.recurseWith = copyItem
if (!opts.lstat) opts.lstat = promisify(opts.Promise, fs.lstat)
if (!opts.stat) opts.stat = promisify(opts.Promise, fs.stat)
if (!opts.chown) opts.chown = promisify(opts.Promise, fs.chown)
if (!opts.readdir) opts.readdir = promisify(opts.Promise, fs.readdir)
if (!opts.readlink) opts.readlink = promisify(opts.Promise, fs.readlink)
if (!opts.symlink) opts.symlink = promisify(opts.Promise, fs.symlink)
if (!opts.chmod) opts.chmod = promisify(opts.Promise, fs.chmod)
opts.top = from
opts.mkdirpAsync = promisify(opts.Promise, mkdirp)
var rimrafAsync = promisify(opts.Promise, rimraf)
var queue = new RunQueue({
maxConcurrency: opts.maxConcurrency,
Promise: Promise
})
opts.queue = queue
queue.add(0, copyItem, [from, to, opts])
return queue.run().catch(function (err) {
// if the target already exists don't clobber it
if (err.code === 'EEXIST' || err.code === 'EPERM') {
return passThroughError()
} else {
return remove(to).then(passThroughError, passThroughError)
}
function passThroughError () {
return Promise.reject(err)
}
})
function remove (target) {
var opts = {
unlink: fs.unlink,
chmod: fs.chmod,
stat: fs.stat,
lstat: fs.lstat,
rmdir: fs.rmdir,
readdir: fs.readdir,
glob: false
}
return rimrafAsync(target, opts)
}
}
function copyItem (from, to, opts) {
validate('SSO', [from, to, opts])
var fs = opts.fs || nodeFs
var Promise = opts.Promise || global.Promise
var lstat = opts.lstat || promisify(Promise, fs.lstat)
return lstat(to).then(function () {
return Promise.reject(eexists(from, to))
}, function (err) {
if (err && err.code !== 'ENOENT') return Promise.reject(err)
return lstat(from)
}).then(function (fromStat) {
var cmdOpts = extend(extend({}, opts), fromStat)
if (fromStat.isDirectory()) {
return recurseDir(from, to, cmdOpts)
} else if (fromStat.isSymbolicLink()) {
opts.queue.add(1, copySymlink, [from, to, cmdOpts])
} else if (fromStat.isFile()) {
return copyFile(from, to, cmdOpts)
} else if (fromStat.isBlockDevice()) {
return Promise.reject(eunsupported(from + " is a block device, and we don't know how to copy those."))
} else if (fromStat.isCharacterDevice()) {
return Promise.reject(eunsupported(from + " is a character device, and we don't know how to copy those."))
} else if (fromStat.isFIFO()) {
return Promise.reject(eunsupported(from + " is a FIFO, and we don't know how to copy those."))
} else if (fromStat.isSocket()) {
return Promise.reject(eunsupported(from + " is a socket, and we don't know how to copy those."))
} else {
return Promise.reject(eunsupported("We can't tell what " + from + " is and so we can't copy it."))
}
})
}
function recurseDir (from, to, opts) {
validate('SSO', [from, to, opts])
var recurseWith = opts.recurseWith || copyItem
var fs = opts.fs || nodeFs
var chown = opts.chown || promisify(Promise, fs.chown)
var readdir = opts.readdir || promisify(Promise, fs.readdir)
var mkdirpAsync = opts.mkdirpAsync || promisify(Promise, mkdirp)
return mkdirpAsync(to, {fs: fs, mode: opts.mode}).then(function () {
var getuid = opts.getuid || process.getuid
if (getuid && opts.uid != null && getuid() === 0) {
return chown(to, opts.uid, opts.gid)
}
}).then(function () {
return readdir(from)
}).then(function (files) {
files.forEach(function (file) {
opts.queue.add(0, recurseWith, [path.join(from, file), path.join(to, file), opts])
})
})
}
function copySymlink (from, to, opts) {
validate('SSO', [from, to, opts])
var fs = opts.fs || nodeFs
var readlink = opts.readlink || promisify(Promise, fs.readlink)
var stat = opts.stat || promisify(Promise, fs.symlink)
var symlink = opts.symlink || promisify(Promise, fs.symlink)
var Promise = opts.Promise || global.Promise
return readlink(from).then(function (fromDest) {
var absoluteDest = path.resolve(path.dirname(from), fromDest)
// Treat absolute paths that are inside the tree we're
// copying as relative. This necessary to properly support junctions
// on windows (which are always absolute) but is also DWIM with symlinks.
var relativeDest = path.relative(opts.top, absoluteDest)
var linkFrom = relativeDest.substr(0, 2) === '..' ? fromDest : path.relative(path.dirname(from), absoluteDest)
if (opts.isWindows) {
return stat(absoluteDest).catch(function () { return null }).then(function (destStat) {
var isDir = destStat && destStat.isDirectory()
var type = isDir ? 'dir' : 'file'
return symlink(linkFrom, to, type).catch(function (err) {
if (type === 'dir') {
return symlink(linkFrom, to, 'junction')
} else {
return Promise.reject(err)
}
})
})
} else {
return symlink(linkFrom, to)
}
})
}
function copyFile (from, to, opts) {
validate('SSO', [from, to, opts])
var fs = opts.fs || nodeFs
var writeStreamAtomic = opts.writeStreamAtomic || stockWriteStreamAtomic
var Promise = opts.Promise || global.Promise
var chmod = opts.chmod || promisify(Promise, fs.chmod)
var writeOpts = {}
var getuid = opts.getuid || process.getuid
if (getuid && opts.uid != null && getuid() === 0) {
writeOpts.chown = {
uid: opts.uid,
gid: opts.gid
}
}
return new Promise(function (resolve, reject) {
var errored = false
function onError (err) {
errored = true
reject(err)
}
fs.createReadStream(from)
.once('error', onError)
.pipe(writeStreamAtomic(to, writeOpts))
.once('error', onError)
.once('close', function () {
if (errored) return
if (opts.mode != null) {
resolve(chmod(to, opts.mode))
} else {
resolve()
}
})
})
}
function eexists (from, to) {
var err = new Error('Could not move ' + from + ' to ' + to + ': destination already exists.')
err.code = 'EEXIST'
return err
}
function eunsupported (msg) {
var err = new Error(msg)
err.code = 'EUNSUPPORTED'
return err
}