API(8.1.1-canary.28): error logged when importing child_process

[Janpot]

Bug report

Describe the bug

Errors are shown in the logs when trying to import child_process in an api function.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Create an api function

// /pages/api/hello.js
import 'child_process';
export default (req, res) => {
  res.end('hello');
};

2. start next dev server
3. visit http://localhost:3000/api/hello in the browser
4. See error

[ error ] ./pages/api/hello.js
Module not found: Can't resolve 'child_process' in '<project-root>/pages/api'

Expected behavior

No error

Screenshots

If applicable, add screenshots to help explain your problem.

System information

• OS: macOS
• Version of Next.js: 8.1.1-canary.28

Additional context

Functionally there doesn't seem to be any problem, looks like it's just a logging problem.

[Janpot]

Functionally there doesn't seem to be any problem, looks like it's just a logging problem.

Actually, there is a problem, this seems to break rendering all the pages, with the same error.

[timneutkens]

Note that you're using experimental features. This in particular is caused by the /api implementation not being complete yet.

[Janpot]

I'm aware, just test driving new features. I can hold off on opening a ticket like this if you think it's too early, or report somewhere else.

[huv1k]

This is fixed in latest canary 🚀

[aaahrens]

I am getting this error again in canary of 9. Any advice?

[IMax153]

@huv1k I am also running into the same issue trying to integrate the GraphQL API endpoints example with Prisma2. The query engine, PhotonJS, seems to depend on 'child_process', which results in an error every time I hit the GraphQL endpoint (or any other endpoint that attempts to use PhotonJS).

ModuleNotFoundError: Module not found: Error: Can't resolve 'child_process' in '/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/@generated/photon/runtime'
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/Compilation.js:888:10
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:401:22
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:130:21
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:224:22
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/neo-async/async.js:2830:7
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/neo-async/async.js:6877:13
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:214:25
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:213:14
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :15:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:44:7
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :15:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :27:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/DescriptionFilePlugin.js:67:43
ModuleNotFoundError: Module not found: Error: Can't resolve 'child_process' in '/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/@generated/photon/runtime'
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/Compilation.js:888:10
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:401:22
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:130:21
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:224:22
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/neo-async/async.js:2830:7
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/neo-async/async.js:6877:13
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/webpack/lib/NormalModuleFactory.js:214:25
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:213:14
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :15:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/UnsafeCachePlugin.js:44:7
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :15:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/Resolver.js:285:5
    at eval (eval at create (/Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/tapable/lib/HookCodeFactory.js:33:10), :27:1)
    at /Users/maxbrown/Documents/projects/apps/iudex-next/node_modules/enhanced-resolve/lib/DescriptionFilePlugin.js:67:43

[huv1k]

This is most likely how is photon getting the path to the binary. I think it uses __dirname to resolve paths to binary. Next.js it's not working with __dirname yet #8251 But I am not 100% sure, didn't check how exactly photo binary resolution works.