Support config.includeFiles for @now/next

There’s a message/thread in Spectrum about this.

Basically I can’t fs.readFileSync() inside an pages/api/whatever.ts because the files aren’t copied.

I’ve done some investigation in the code for the builders, and I don’t see any parity for the functionality that exists in @now/node. I imagine something should be added around here for that, and am happy to try a PR if you don’t think this is too crazy.

Here’s the info I posted in Spectrum:

I’m having this same issue with @now/next, so I have this in a now.json file:

{
  "version": 2,
  "builds": [
    {
      "src": "next.config.js",
      "use": "@now/next",
      "config": {
        "includeFiles": ["email-templates/**"]
      }
    }
  ]
}

Where a directory with this structure exists in the root of the app/directory:

email-templates
├── login
│   ├── html.pug
│   └── subject.pug
├── main.pug
└── mixins.pug

And I can’t read the files at all (I’ve tried all kinds of combinations to just find the files, and here’s the latest):

const templateFilePath = path.join(__dirname, 'email-templates', 'login', 'html.pug');
const templateContent = fs.readFileSync(templateFilePath).toString('utf8');

The error I get is:

Unhandled Promise Rejection    {"errorType":"Runtime.UnhandledPromiseRejection","errorMessage":"Error: ENOENT: no such file or directory, open '/email-templates/login/html.pug'","stack":["Runtime.UnhandledPromiseRejection: Error: ENOENT: no such file or directory, open '/email-templates/login/html.pug'","    at process.on (/var/runtime/index.js:37:15)","    at process.emit (events.js:203:15)","    at emitPromiseRejectionWarnings (internal/process/promises.js:119:20)","    at process._tickCallback (internal/process/next_tick.js:69:34)"],"reason":{"errorType":"Error","errorMessage":"ENOENT: no such file or directory, open '/email-templates/login/html.pug'","code":"ENOENT","stack":["Error: ENOENT: no such file or directory, open '/email-templates/login/html.pug'","    at Object.openSync (fs.js:443:3)","    at Object.readFileSync (fs.js:343:35)","    at Object.sendLoginEmail (/var/task/.next/serverless/pages/api/v0/signup.js:564:71)","    at module.exports.L76w.__webpack_exports__.default (/var/task/.next/serverless/pages/api/v0/signup.js:471:67)","    at process._tickCallback (internal/process/next_tick.js:68:7)"],"errno":-2,"syscall":"open","path":"/email-templates/login/html.pug"},"promise":{}}
2019-09-26T14:35:19.168Z    bea5a417-7224-4397-b4ec-81b6838540a2    ERROR    Unhandled rejection: { Error: ENOENT: no such file or directory, open '/email-templates/login/html.pug'
    at Object.openSync (fs.js:443:3)
    at Object.readFileSync (fs.js:343:35)
    at Object.sendLoginEmail (/var/task/.next/serverless/pages/api/v0/signup.js:564:71)
    at module.exports.L76w.__webpack_exports__.default (/var/task/.next/serverless/pages/api/v0/signup.js:471:67)
    at process._tickCallback (internal/process/next_tick.js:68:7)
  errno: -2,
  syscall: 'open',
  code: 'ENOENT',
  path: '/email-templates/login/html.pug' }

And while the path looks weird (I’d expect __dirname to be /var/task, not /), it also doesn’t work if I try to read /var/task/email-templates/login/html.pug.

Thanks!

[BrunoBernardino]

Thanks! If I run into these issues again in the future I’ll add more info.

[gunar]

I just realized require('./file.json') works fine, so we just need to generate a json file at build time:

1. Create a script that reads whatever files you need, and exports them as json
2. Add this to package.json: "build": "node script.js>data.json && next build"
3. Have your serverless function require the json as such require('../../data.json')

In my case it was even simpler. The output was static so I just wrote it directly into /public.

Hope this helps!