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