Error combining with 6to5ify

I’m trying to do a brfs transform after 6to5ify, but get the following error.

browserify()
    .require("main", { entry: true })
    .transform(6to5ify)
    .transform(brfs)
    .bundle()
    .pipe(fs.createWriteStream(path.join('app.js')));

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: tried to statically call { readFile: [Function: readFile], readFileSync: [Function: readFileSync], readdir: [Function: readdir], readdirSync: [Function: readdirSync] } as a function while parsing file: /Users/akula/foo/main.js while parsing file: /Users/akula/foo/main.js
    at error (/Users/akula/foo/node_modules/brfs/node_modules/static-module/index.js:71:49)
    at traverse (/Users/akula/foo/node_modules/brfs/node_modules/static-module/index.js:247:24)
    at walk (/Users/akula/foo/node_modules/brfs/node_modules/static-module/index.js:216:13)
    at walk (/Users/akula/foo/node_modules/brfs/node_modules/static-module/node_modules/falafel/index.js:60:9)
    at /Users/akula/foo/node_modules/brfs/node_modules/static-module/node_modules/falafel/index.js:51:25
    at Array.forEach (native)
    at forEach (/Users/akula/foo/node_modules/brfs/node_modules/static-module/node_modules/falafel/index.js:8:31)
    at /Users/akula/foo/node_modules/brfs/node_modules/static-module/node_modules/falafel/index.js:49:17
    at Array.forEach (native)
    at forEach (/Users/akula/foo/node_modules/brfs/node_modules/static-module/node_modules/falafel/index.js:8:31)

btw, there’s a double “while parsing file” in the message.

My main.js looks like this.

import fs from 'fs';

var foo = fs.readFileSync(__dirname + '/foo.html');
console.log(foo.toString());

If I change the import to a require and don’t do 6to5ify it works fine, but together it gives the error.

[danharper]

I’m guessing this is down to how Babel (was: 6to5) transpiles ES6 imports. This:

import fs from 'fs'

Becomes this:

var _interopRequire = function (obj) { return obj && obj.__esModule ? obj["default"] : obj; };

var fs = _interopRequire(require("fs"));

If you want to go this route, resorting to a regular require call works fine:

var fs = require('fs');

[erykpiast]

But it works perfectly fine when used like

var fs = require('fs');
var content = fs.readFileSync(__dirname + '/file', 'utf8');

I don’t have to disable 6to5.