node-fs-extra/lib/copy-sync/copy-sync.js

var fs = require('graceful-fs')
var path = require('path')
var copyFileSync = require('./copy-file-sync')
var mkdir = require('../mkdirs')

function copySync (src, dest, options) {
  if (typeof options === 'function' || options instanceof RegExp) {
    options = {filter: options}
  }

  options = options || {}
  options.recursive = !!options.recursive

  // default to true for now
  options.clobber = 'clobber' in options ? !!options.clobber : true
  // overwrite falls back to clobber
  options.overwrite = 'overwrite' in options ? !!options.overwrite : options.clobber
  options.dereference = 'dereference' in options ? !!options.dereference : false
  options.preserveTimestamps = 'preserveTimestamps' in options ? !!options.preserveTimestamps : false

  options.filter = options.filter || function () { return true }

  // Warn about using preserveTimestamps on 32-bit node:
  if (options.preserveTimestamps && process.arch === 'ia32') {
    console.warn('fs-extra: Using the preserveTimestamps option in 32-bit node is not recommended;\n' +
    'see https://github.com/jprichardson/node-fs-extra/issues/269')
  }

  var stats = (options.recursive && !options.dereference) ? fs.lstatSync(src) : fs.statSync(src)
  var destFolder = path.dirname(dest)
  var destFolderExists = fs.existsSync(destFolder)
  var performCopy = false

  if (options.filter instanceof RegExp) {
    console.warn('Warning: fs-extra: Passing a RegExp filter is deprecated, use a function')
    performCopy = options.filter.test(src)
  } else if (typeof options.filter === 'function') performCopy = options.filter(src)

  if (stats.isFile() && performCopy) {
    if (!destFolderExists) mkdir.mkdirsSync(destFolder)
    copyFileSync(src, dest, {
      overwrite: options.overwrite,
      errorOnExist: options.errorOnExist,
      preserveTimestamps: options.preserveTimestamps
    })
  } else if (stats.isDirectory() && performCopy) {
    if (!fs.existsSync(dest)) mkdir.mkdirsSync(dest)
    var contents = fs.readdirSync(src)
    contents.forEach(function (content) {
      var opts = options
      opts.recursive = true
      copySync(path.join(src, content), path.join(dest, content), opts)
    })
  } else if (options.recursive && stats.isSymbolicLink() && performCopy) {
    var srcPath = fs.readlinkSync(src)
    fs.symlinkSync(srcPath, dest)
  }
}

module.exports = copySync