feat(linter) Parse eslint configuration

[camc314]

DRAFT

Adds support for parsing eslint configuration files.

Example:

cargo run --bin=oxc_cli lint --config-path ./.eslintrc.json .

This isn't a full implementation of how eslint parses configs but should be fine for now:

Currently supported extends:

• eslint:recommended -> eslint
• plugin:react/recommended -> react
• plugin:@typescript-eslint/recommended -> typescript
• plugin:react-hooks/recommended -> react
• plugin:unicorn/recommended -> unicorn
• plugin:jest/recommended -> jest

These defaults can all be overridden by configuring the rule in the rules section of the estlint config:

e.g.

{
    "extends": [
        "eslint:recommended"
    ],
    "rules": {
        "eqeqeq": "off"
    },
}

This would enable of of the rules within the eslint group. But would not enable eqeqeq as it is explicitly disabled

Note, we do not currently support the following:

• supplying a filter and config-path
• supplying a plugin and config-path

---

Edit:

• @Boshen Test this manually

[Boshen]

This is amazing, shall we start refactoring and start merging?

After getting introduced to https://graphite.dev/ and https://stacking.dev/, I prefer smaller PRs so we can iterate faster. You may also play around with graphite 😁

[camc314]

This is amazing, shall we start refactoring and start merging?

yes! let me tidy this up today

After getting introduced to https://graphite.dev/ and https://stacking.dev/, I prefer smaller PRs so we can iterate faster. You may also play around with graphite 😁

👀 i'll take a look. Would definitly be helpful at work - I always have too many PRs open 🙂

[aminpaks]

yes! let me tidy this up today

👋 what happens with configs related to rules that oxc doesn't yet support?

[camc314]

yes! let me tidy this up today

👋 what happens with configs related to rules that oxc doesn't yet support?

they'll be ignored

[JoseBuendiaDigio]

Any news about this?

[Boshen]

👍 Nice work! I'll test this by Monday when I have some internal code to test with.

[bcentdev]

yes! let me tidy this up today

👋 what happens with configs related to rules that oxc doesn't yet support?

they'll be ignored

Will be some log to see what rules are being ignored? Or what rules of the config will being applied? Thanks.

[codspeed-hq]

CodSpeed Performance Report

Merging #1146 will not alter performance

_{Comparing camc314:c/eslint-config (ffb4cf0) with main (c9589b5)}

Summary

✅ 20 untouched benchmarks

[Boshen]

@camc314 I apologize for my procrastination on reviewing and merging this PR, I'm really happy with the current state, so let's .

But before shipping the next release, we need to figure out what should be done with extends, because the behavior is not matching with eslint (obviously).

[rogerleung0411]

any roadmap on other config file format like .eslintrc.js or .eslintrc.cjs ?