gistfile1.txt

  // needs to handle the following cases
  //
  // require("a.<ext>")
  //   -> a.<ext>
  //
  // require("a")
  //   -> a
  //   -> a.<ext>
  //   -> a/index.<ext>

  function findModulePath (request, paths) {
    paths = request.charAt(0) === "/" ? [""] : paths;

    var fs = requireNative('fs')
      , exts = Object.keys(extensions);

    var tryFile = function (requestPath) {
        debug(requestPath);
        try {
          stats = fs.statSync(requestPath);
          if (stats && !stats.isDirectory()) {
            return requestPath;
          }
        } catch(e) {}
        return false;
      };

    var tryExtensions = function (p) {
      debug(JSON.stringify(exts));
      for (var i = 0; i < exts.length; i++) {
        f = tryFile(p + exts[i]);
        if (f) return f;
      }
    };

    for (var i = 0, PL = paths.length; i < PL; i++) {
      var p = paths[i];
        , f = tryFile(path.join(p, request)) ||
              tryExtensions(path.join(p, request))
              tryExtensions(path.join(p, request, "index"));
      if (f) { return f; }
    }
    return false;
  }