feat(cli): warn underlying command when using `npx react-native init`

[byCedric]

Summary:

This adds a new warning for React Native 0.74, implementing the RFC 0759 init command changes.

• It's added inside react-native/cli.js to avoid warning users when actually executing npx @react-native-community/cli commands.
• The check is fairly simple: process.argv[2] === 'init'. The first two args are the Node bin and the actual script bin paths.
• The message is sent over console.warn to avoid potentially mixing JSON with non-JSON output.

Changelog:

[GENERAL] [ADDED] - Warn with future command when using npx react-native init

Test Plan:

Any command other than init must not warn.

• $ node ./path/to/react-native/cli.js init
• $ node ./path/to/react-native/cli.js init --help
  • Should warn with Running: npx @react-native-community/cli init
• $ node ./path/to/react-native/cli.js --help
  • Must not warn

[byCedric]

I'm not sure if there are tests for react-native/cli.js, but I would be happy to add a test to validate this. Just not sure where this is tested.

[facebook-github-bot]

@cortinico has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@cortinico merged this pull request in facebook/react-native@a6397afb7f4279e70afa025fe6f9fa0b8e3de3fd.