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Use native ESLint behaviour when extending #8276

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Mar 1, 2020
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2 changes: 1 addition & 1 deletion docusaurus/docs/advanced-configuration.md
Original file line number Diff line number Diff line change
Expand Up @@ -22,5 +22,5 @@ You can adjust various development and production settings by setting environmen
| NODE_PATH | ✅ Used | ✅ Used | Same as [`NODE_PATH` in Node.js](https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders), but only relative folders are allowed. Can be handy for emulating a monorepo setup by setting `NODE_PATH=src`. |
| INLINE_RUNTIME_CHUNK | 🚫 Ignored | ✅ Used | By default, Create React App will embed the runtime script into `index.html` during the production build. When set to `false`, the script will not be embedded and will be imported as usual. This is normally required when dealing with CSP. |
| IMAGE_INLINE_SIZE_LIMIT | 🚫 Ignored | ✅ Used | By default, images smaller than 10,000 bytes are encoded as a data URI in base64 and inlined in the CSS or JS build artifact. Set this to control the size limit in bytes. Setting it to 0 will disable the inlining of images. |
| EXTEND_ESLINT | ✅ Used | ✅ Used | When set to `true`, ESLint configs that extend `eslint-config-react-app` will be used by `eslint-loader`. Any rules that are set to `"error"` will stop the application from building. |
| EXTEND_ESLINT | ✅ Used | ✅ Used | When set to `true`, user provided ESLint configs will be used by `eslint-loader`. Note that any rules set to `"error"` will stop the application from building. |
| TSC_COMPILE_ON_ERROR | ✅ Used | ✅ Used | When set to `true`, you can run and properly build TypeScript projects even if there are TypeScript type check errors. These errors are printed as warnings in the terminal and/or browser console. |
1 change: 0 additions & 1 deletion docusaurus/docs/setting-up-your-editor.md
Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,6 @@ Note that any rules set to `"error"` will stop the project from building.
There are a few things to remember:

1. We highly recommend extending the base config, as removing it could introduce hard-to-find issues.
1. `.eslintignore` files will be respected
1. When working with TypeScript, you'll need to provide an `overrides` object for rules that should _only_ target TypeScript files.

In the below example:
Expand Down
34 changes: 10 additions & 24 deletions packages/react-scripts/config/webpack.config.js
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,6 @@ const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
const ForkTsCheckerWebpackPlugin = require('react-dev-utils/ForkTsCheckerWebpackPlugin');
const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
// @remove-on-eject-begin
const eslint = require('eslint');
const getCacheIdentifier = require('react-dev-utils/getCacheIdentifier');
// @remove-on-eject-end
const postcssNormalize = require('postcss-normalize');
Expand All @@ -46,6 +45,8 @@ const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
// makes for a smoother build process.
const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';

const isExtendingEslintConfig = process.env.EXTEND_ESLINT === 'true';

const imageInlineSizeLimit = parseInt(
process.env.IMAGE_INLINE_SIZE_LIMIT || '10000'
);
Expand Down Expand Up @@ -270,8 +271,8 @@ module.exports = function(webpackEnv) {
: false,
},
cssProcessorPluginOptions: {
preset: ['default', { minifyFontValues: { removeQuotes: false } }]
}
preset: ['default', { minifyFontValues: { removeQuotes: false } }],
},
}),
],
// Automatically split vendor and commons
Expand Down Expand Up @@ -354,28 +355,13 @@ module.exports = function(webpackEnv) {
eslintPath: require.resolve('eslint'),
resolvePluginsRelativeTo: __dirname,
// @remove-on-eject-begin
ignore: process.env.EXTEND_ESLINT === 'true',
baseConfig: (() => {
// We allow overriding the config only if the env variable is set
if (process.env.EXTEND_ESLINT === 'true') {
const eslintCli = new eslint.CLIEngine();
let eslintConfig;
try {
eslintConfig = eslintCli.getConfigForFile(
paths.appIndexJs
);
} catch (e) {
console.error(e);
process.exit(1);
}
return eslintConfig;
} else {
return {
ignore: isExtendingEslintConfig,
baseConfig: isExtendingEslintConfig
? undefined
: {
extends: [require.resolve('eslint-config-react-app')],
};
}
})(),
useEslintrc: false,
},
useEslintrc: isExtendingEslintConfig,
// @remove-on-eject-end
},
loader: require.resolve('eslint-loader'),
Expand Down