filter-paths.js

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


var cleanPath = function(filepath) {
  filepath = path.relative(process.cwd(), filepath);
  return filepath.replace(/\\/g, '/');
};

function lookupFiles(dir, recursive) {
  recursive = recursive || true;
  var files = [];

  var stat = fs.statSync(dir);
  if (stat.isFile()) {
    return dir;
  }

  fs.readdirSync(dir).forEach(function (filepath) {
    filepath = path.resolve(path.join(dir, filepath));
    var stat = fs.statSync(filepath);

    if (stat.isDirectory()) {
      if (recursive === true) {
        files = files.concat(lookupFiles(filepath, recursive));
      }
      return;
    }
    if (!stat.isFile()) {
      return;
    }
    files.push(filepath);
  });

  return files;
}

// var result = lookupFiles('.');
// console.log(result);


function filter(dir, options) {
  options = options || {};
  var matches = [];
  var i = 0;

  lookupFiles(dir).map(function (item) {
    i++;
    matches.push(item);

    if (options.basename) {
      var filename = path.basename(item);

      options.basename.forEach(function (filepath) {
        if (filename.indexOf(filepath) !== -1) {
          matches.splice(filename.indexOf(i))
        }
      });
    }

    if (options.dirname) {
      var dir = path.dirname(item);

      options.dirname.forEach(function (dirpath) {
        if (dir.indexOf(dirpath) !== -1) {
          matches.splice(dir.indexOf(i))
        }
      });
    }
  });

  return matches;
}
var results = filter('.', {
  basename: ['js', 'md'],
  dirname: ['node_modules']
}).map(cleanPath);

console.log(results);