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Edit File: ncp.js

var fs = require('fs'),
    path = require('path');

module.exports = ncp
ncp.ncp = ncp

function ncp (source, dest, options, callback) {
  if (!callback) {
    callback = options;
    options = {};
  }

var basePath = process.cwd(),
      currentPath = path.resolve(basePath, source),
      targetPath = path.resolve(basePath, dest),
      filter = options.filter,
      transform = options.transform,
      clobber = options.clobber !== false,
      errs = null,
      started = 0,
      finished = 0,
      running = 0,
      limit = options.limit || ncp.limit || 16;

limit = (limit < 1) ? 1 : (limit > 512) ? 512 : limit;

startCopy(currentPath);
  
  function startCopy(source) {
    started++;
    if (filter) {
      if (filter instanceof RegExp) {
        if (!filter.test(source)) {
          return cb(true);
        }
      }
      else if (typeof filter === 'function') {
        if (!filter(source)) {
          return cb(true);
        }
      }
    }
    return getStats(source);
  }

function defer(fn) {
    if (typeof(setImmediate) === 'function')
      return setImmediate(fn);
    return process.nextTick(fn);
  }

// We need to get the mode from the stats object and preserve it.
      item.name = source;
      item.mode = stats.mode;

if (stats.isDirectory()) {
        return onDir(item);
      }
      else if (stats.isFile()) {
        return onFile(item);
      }
      else if (stats.isSymbolicLink()) {
        // Symlinks don't really need to know about the mode.
        return onLink(source);
      }
    });
  }

function rmFile(file, done) {
    fs.unlink(file, function (err) {
      if (err) {
        return onError(err);
      }
      return done();
    });
  }

function mkDir(dir, target) {
    fs.mkdir(target, dir.mode, function (err) {
      if (err) {
        return onError(err);
      }
      copyDir(dir.name);
    });
  }

function makeLink(linkPath, target) {
    fs.symlink(linkPath, target, function (err) {
      if (err) {
        return onError(err);
      }
      return cb();
    });
  }

function cb(skipped) {
    if (!skipped) running--;
    finished++;
    if ((started === finished) && (running === 0)) {
      return errs ? callback(errs) : callback(null);
    }
  }
};

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