Dev server is closed with code 1 on SIGTERM

[kirill-konshin]

Bug report

This is a bug report + a workaround that can help someone who will experience same issue like me.

Describe the bug

https://github.com/zeit/next.js/blob/master/bin/next#L78

Dev server is closed with code 1 on SIGTERM. For example this breaks jest-puppeteer (which use jest-dev-server): it kills the server process after all tests are done.

To Reproduce

The following simple jest-puppeteer.config.js may be used:

module.exports = {
    server: {
        command: 'npm start',
        port: 3000,
        launchTimeout: 30000
    }
};

Expected behavior

Process should exit with 0 code on SIGTERM. Not sure why SIGTERM results in 1 error code, that's not an error, it's just a termination, so if it is successfully terminated 0 code is fine.

Workaround

Working workaround :) — put || exit 0 or || true in package.json:

{
  "scripts": {
    "start": "next || exit 0"
  }
}

Does not work:

module.exports = {
    server: {
        command: 'npm start || exit 0'
    }
};

[kirill-konshin]

That’s the speed! Nice!