Raise an error when the version of node is older than package.json's engines.node

[mattwynne]

Description

Adds a warning if the process.version is too old for Cucumber to work.

Motivation & context

Fixes #1890 - we had a user who was running an older node version and got confused.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have read the CONTRIBUTING document.
• My change needed additional tests
  • I have added tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

[mattwynne]

It's nigh-on impossible to test this other than manually. Here's the result of my manual test:

➜  cucumber-js git:(check-node-version) node --version
v11.10.1
➜  cucumber-js git:(check-node-version) npm run feature-test
(node:57566) ExperimentalWarning: The fs.promises API is experimental

> @cucumber/cucumber@8.0.0-rc.2 prefeature-test
> npm run build-local


> @cucumber/cucumber@8.0.0-rc.2 build-local /Users/matt/git/github.com/cucumber/cucumber-js
> genversion --es6 src/version.ts && tsc --build tsconfig.node.json && shx cp src/importer.js lib/ && shx cp src/wrapper.mjs lib/


> @cucumber/cucumber@8.0.0-rc.2 feature-test
> node ./bin/cucumber-js

internal/modules/cjs/loader.js:615
    throw err;
    ^

Error: Cannot find module '/Users/matt/git/github.com/cucumber/cucumber-js/lib/check_node_version.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:613:15)
    at Function.Module._load (internal/modules/cjs/loader.js:539:25)
    at Module.require (internal/modules/cjs/loader.js:667:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/Users/matt/git/github.com/cucumber/cucumber-js/lib/importer.js:1:63)
    at Module._compile (internal/modules/cjs/loader.js:738:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:749:10)
    at Module.load (internal/modules/cjs/loader.js:630:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:570:12)
    at Function.Module._load (internal/modules/cjs/loader.js:562:3)

[coveralls]

Coverage decreased (-0.08%) to 98.128% when pulling 3e67e38 on check-node-version into c1ed743 on main.

[mattwynne]

Two possible improvements:

1. It might be nicer to print the error message without the stacktrace, but I'm not sure how to do that without adding console-specific code, which feels wrong in this file. (I'm kinda surprised there's not an error handler at the UI level?)

2. It seems like putting the check in the importer is the right place to have it, since that's where we need to be on that version, but I guess it could move more centrally, and look up the right version from the package.json?

[davidjgoss]

It might be nicer to print the error message without the stacktrace, but I'm not sure how to do that without adding console-specific code, which feels wrong in this file.

It seems like putting the check in the importer is the right place to have it, since that's where we need to be on that version, but I guess it could move more centrally

Lack of ESM support is the symptom you ran into, but I think there's a good chance of us using some other language feature or standard library that's only in our supported versions. I'd advocate for putting it here https://github.com/cucumber/cucumber-js/blob/main/src/cli/run.ts which is the entry point for the CLI, and where you could just do console.error and then process.exit(1) because as you've noted the stack trace isn't useful in this scenario.

...and look up the right version from the package.json?

Nice to have, but not essential IMO. I think it would be sufficient to add a section to the CONTRIBUTING.md on how to manage dropping an EOL'd Node version - up to you though!

[mattwynne]

OK this is good enough now IMO. Please check and merge!