react/compiler/packages/eslint-plugin-react-compiler
lauren 00aa0043c7
[compiler] Migrate compiler packages to tsup (#32550)
Currently in the `compiler` workspace, we invoke esbuild directly to
build most packages (with the exception of `snap`). This has been mostly
fine, but does not allow us to do things like generate type declaration
files.

I would like #32416 to be able to consume the merged
eslint-plugin-react-compiler from source rather than via npm, and one of
the things that has come up from my exploration in that stack using the
compiler from source is that babel-plugin-react-compiler is missing type
declarations. This is primarily because React's build process uses
rollup + rollup-plugin-typescript, which runs tsc. So the merged plugin
needs to typecheck properly in order to build. An alternative might be
to migrate to something like babel with rollup instead to simply strip
types rather than typecheck before building. The minor downside of that
approach is that we would need to manually maintain a d.ts file for
eslint-plugin-react-hooks. For now I would like to see if this PR helps
us make progress rather than go for the slightly worse alternative.

[`tsup`](https://github.com/egoist/tsup) is esbuild based so build
performance is comparable. It is slower when generating d.ts files, but
it's still much faster than rollup which we used prior to esbuild. For
now, I have turned off `dts` by default, and it is only passed when
publishing on npm.

If you want to also generate d.ts files you can run `yarn build --dts`.

```
# BEFORE: build all compiler packages (esbuild)
$ time yarn build

  Done in 15.61s.
yarn build  13.82s user 1.54s system 96% cpu 15.842 total

# ---

# AFTER: build all compiler packages (tsup)
$ time yarn build

  Done in 12.39s.
yarn build  12.58s user 1.68s system 106% cpu 13.350 total

# ---

# AFTER: build all compiler packages and type declarations (tsup)
$ time yarn build --dts

  Done in 30.69s.
yarn build  43.57s user 3.20s system 150% cpu 31.061 total
```

I still need to test if this unblocks #32416 but this stack can be
landed independently though as we could probably just release type
declarations on npm. No one should be using the compiler directly, but
if they really wanted to, lack of type declarations would not stop them
(cf React secret internals).

Note that I still kept esbuild as we still use it directly for forgive.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/32550).
* #32551
* __->__ #32550
2025-03-07 16:41:55 -05:00
..
__tests__ [compiler] Surface unused opt out directives in eslint 2024-08-16 18:12:05 -04:00
src [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00
babel.config.js Compiler: unfork prettier config (#30205) 2024-07-18 17:00:24 -04:00
package.json [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00
README.md docs(eslint-plugin-react-compiler): fix typo (#32149) 2025-01-22 16:59:50 +01:00
tsconfig.json [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00
tsup.config.ts [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00

eslint-plugin-react-compiler

ESLint plugin surfacing problematic React code found by the React compiler.

Installation

You'll first need to install ESLint:

npm i eslint --save-dev

Next, install eslint-plugin-react-compiler:

npm install eslint-plugin-react-compiler --save-dev

Usage

Flat config

Edit your eslint 8+ config (for example eslint.config.mjs) with the recommended configuration:

+ import reactCompiler from "eslint-plugin-react-compiler"
import react from "eslint-plugin-react"

export default [
    // Your existing config
    { ...pluginReact.configs.flat.recommended, settings: { react: { version: "detect" } } },
+   reactCompiler.configs.recommended    
]

Legacy config (.eslintrc)

Add react-compiler to the plugins section of your configuration file. You can omit the eslint-plugin- prefix:

{
    "plugins": [
        "react-compiler"
    ]
}

Then configure the rules you want to use under the rules section.

{
    "rules": {
        "react-compiler/react-compiler": "error"
    }
}

Rules

TODO: Run eslint-doc-generator to generate the rules list.