Cannot find module 'internal/fs' after upg

Question

We've recently tried to upgrade to node v7.0.0 on our build server, but started to have issues during the application build task failing on the "bower_concat" step:

Loading "bower-concat.js" tasks...ERROR
Error: Cannot find module 'internal/fs'

What we have installed:

• node v7.0.0 (installed via yum "nodesource" repository)
• npm 4.0.1
• using grunt (if this is relevant)
• grunt-bower-concat 0.6.0

The grunt build task configuration:

grunt.registerTask(
    'build:prod', [
        'clean:prod',
        'copy:prod',
        'replace',
        'bower_concat',
        'ngtemplates',
        'concat',
        'uglify',
        'cssmin',
        'injector:prod',
        'copy:cssfix',
        'copy:dist',
        'bowercopy:dist',
        'bowercopy:fonts',
        'template:setProdVersion'
    ]
);

And the grunt bower_concat task:

bower_concat: {
    all: {
        dest: '<%= app.build %>/bower.js',
        cssDest: '<%= app.build %>/bower.css',
        dependencies: {
            'bootstrap': 'jquery'
        },
        mainFiles: {
            "angular-app-modules": [
                "app/dist/angular-app-modules.min.js",
                "app/dist/angular-app-modules.min.css"
            ]
        }
    }
}, 

Note that it works without any problems on node v6.9.0.

What can be causing the issue? Can we workaround the problem without downgrading to node v6?

---

There is also this relevant issue, but, as of now, the information there does not help in our case.

Answer 1

You need to install the last version of bower

> npm install -g bower

Apparently, npm > 4.0 do not use internal/fs module.

Answer 2

On Win10 this worked for me: (adjust to relevant node version and username)

• Uninstall node (via node-v7.8.0-x64.msi)
• Remove the folders 'npm' and 'npm-cache' in 'C:\Users\yourusername\AppData\Roaming
• Install node again (via node-v7.8.0-x64.msi)

Answer 3

In my case clearing the cache did not work. Below was my initial state and how I resolved this:

node -v v7.4.0
npm -v 4.0.5

I resolved by doing the following and using n manager:

$ sudo n 6.9.1
$ sudo npm -g install npm@next
$ sudo n stable

Hope this helps!

Answer 4

I solve this by installing NVM to manage Node

https://github.com/creationix/nvm#installation

after install NVM, reinstall node

nvm install node

Answer 5

In linux，when I update to node 7, this happened, "npm cache clean" does work.

In windows, npm cache clean also generate

Error: Cannot find module 'internal/fs'

Just remove

C:\Users[username]\AppData\Roaming\npm

C:\Users[username]\AppData\Roaming\npm-cache

solved