• Extending prettier:
  • no-spaced-func deprecated in eslint since version 3.3.0
    • https://eslint.org/docs/rules/no-spaced-func
  • indent-legacy is deprecated in eslint since version 4.0.0
    • Update: add deprecated indent-legacy rule as v3.x indent rule snapshot eslint/eslint#8286
• Extending prettier/react:
  • react/jsx-space-before-closing deprecated in eslint-plugin-react since version 7.0.0:
    • eslint-plugin-react changelog

Not sure what's the policy here for deprecated rules.
My use case is to catch deprecated rules in an existing config using eslint-find-rules.
The issue is that projects have configurations with deprecated rules and ESLint does not warn about it.

So I'd like to catch such cases, possible with:

npx eslint-find-rules -d .eslintrc

Ideally this would exit with a 0 value and when I bump ESLint or related configs/plugins, it'll exit with non 0 and show me which rules are deprecated.

Right now it's not possible when extending eslint-config-prettier:

.eslintrc:

{
  "extends": ["prettier"]
}

$ npx eslint-find-rules -d .eslintrc

deprecated rules

indent-legacy    no-spaced-func