code: function preparePackage() {
      var ignoreFiles = ['package.json', 'README.md', 'LICENSE.md', '.gitignore', '.npmignore'];
      var ignoreCopyFiles = [];
      var copyRecursiveSync = function(src, dest) {
          var exists = fs.existsSync(src);
          var stats = exists && fs.statSync(src);
          var isDirectory = exists && stats.isDirectory();
          if (exists && isDirectory) {
              if (!fs.existsSync(dest)) {
                  fs.mkdirSync(dest);
              }
              fs.readdirSync(src).forEach(function(filename) {
                  copyRecursiveSync(upath.join(src, filename),
                      upath.join(dest, filename));
              });
          } else {
              if (ignoreCopyFiles.indexOf(upath.basename(src)) === -1) {
                  fs.linkSync(src, dest);
              }
          }
      };
      var srcPkg = upath.join(process.cwd(), 'src');
      if (fs.existsSync(srcPkg)) {
          fs.readdirSync(process.cwd()).forEach(function(filename) {
              var curPath = upath.join(process.cwd(), filename);
              if (ignoreFiles.indexOf(upath.basename(curPath)) === -1 && fs.statSync(curPath).isFile()) {
                  fs.unlinkSync(curPath);
              }
          });
          copyRecursiveSync(srcPkg, process.cwd());
      }
      deleteFolderRecursive(srcPkg);
      deleteFolderRecursive(upath.join(process.cwd(), 'test'));
      deleteFolderRecursive(upath.join(process.cwd(), 'env'));
  }
docs: Clean package root and exclude src