EJS-node-api

1 path

exports.resolveInclude = function(name, filename, isDir) {
  var dirname = path.dirname;
  var extname = path.extname;
  var resolve = path.resolve;
  var includePath = resolve(isDir ? filename : dirname(filename), name);
  var ext = extname(name);
  if (!ext) {
    includePath += '.ejs';
  }
  return includePath;
};

path.dirname : 返回绝对路劲

path.extname: 文件扩展名

path.resolve: 对一系列路劲求绝对路劲，从右向左

2 fs

if (options.filename) {
      filePath = exports.resolveInclude(path, options.filename);
      if (fs.existsSync(filePath)) {
        includePath = filePath;
      }
    }

fs.existsSync : Returns true if the path exists, false otherwise.

if (fs.existsSync('/etc/passwd')) {
  console.log('The file exists.');
}