# @kitschpatrol/eslint-config [](https://npmjs.com/package/@kitschpatrol/eslint-config) [](https://opensource.org/license/mit/) **ESLint configuration for @kitschpatrol/shared-config.** ## Overview It's a shared [ESLint](https://eslint.org) config, plus a command-line tool `ksc-eslint` to perform ESLint-related project initialization, linting, and fixing. > [!IMPORTANT] > > **You can use this package on its own, but it's recommended to use [`@kitschpatrol/shared-config`](https://www.npmjs.com/package/@kitschpatrol/shared-config) instead for a single-dependency and single-package approach to linting and fixing your project.** > > This package is included as a dependency in [`@kitschpatrol/shared-config`](https://www.npmjs.com/package/@kitschpatrol/shared-config), which also automatically invokes the command line functionality in this package via its `ksc` command ## Setup To use just this ESLint config in isolation: 1. Install the basic repository configuration files in your project root. This is required for correct PNPM behavior: ```sh pnpm --package=@kitschpatrol/repo-config dlx ksc-repo init ``` 2. Install and initialize the required TypeScript `tsconfig.json` configuration in your project root: ```sh pnpm add -D @kitschpatrol/typescript-config pnpm --package=@kitschpatrol/typescript-config dlx ksc-typescript init ``` 3. Add the package: ```sh pnpm add -D @kitschpatrol/eslint-config ``` 4. Add the starter `eslint.config.ts` config files to your project root, and add any overrides you'd like: ```sh pnpm exec eslint-ksc init ``` ## Usage The ESLint binary should be picked up automatically by VS Code plugins. You can call it directly, or use the script bundled with the config. Integrate with your `package.json` scripts as you see fit, for example: ```json { "scripts": { "lint": "eslint-config lint", "fix": "eslint-config fix" } } ``` ### CLI #### Command: `ksc-eslint` Kitschpatrol's ESLint shared configuration tools. This section lists top-level commands for `ksc-eslint`. Usage: ```txt ksc-eslint ``` | Command | Argument | Description | | -------------- | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `init` | | Initialize by copying starter config files to your project root. | | `lint` | `[files..]` | Lint your project with ESLint. Matches files below the current working directory by default. | | `fix` | `[files..]` | Fix your project with ESLint. Matches files below the current working directory by default. | | `print-config` | `[file]` | Print the effective ESLint configuration. Package-scoped by default, file-scoped if a file argument is provided. Use `@eslint/config-inspector` for a more detailed view. | | Option | Description | Type | | ------------------- | ------------------- | --------- | | `--help`
`-h` | Show help | `boolean` | | `--version`
`-v` | Show version number | `boolean` | _See the sections below for more information on each subcommand._ #### Subcommand: `ksc-eslint init` Initialize by copying starter config files to your project root. Usage: ```txt ksc-eslint init ``` | Option | Description | Type | | ------------------- | ------------------- | --------- | | `--help`
`-h` | Show help | `boolean` | | `--version`
`-v` | Show version number | `boolean` | #### Subcommand: `ksc-eslint lint` Lint your project with ESLint. Matches files below the current working directory by default. Usage: ```txt ksc-eslint lint [files..] ``` | Positional Argument | Description | Type | Default | | ------------------- | ------------------------------ | ------- | ------- | | `files` | Files or glob pattern to lint. | `array` | `"."` | | Option | Description | Type | | ------------------- | ------------------- | --------- | | `--help`
`-h` | Show help | `boolean` | | `--version`
`-v` | Show version number | `boolean` | #### Subcommand: `ksc-eslint fix` Fix your project with ESLint. Matches files below the current working directory by default. Usage: ```txt ksc-eslint fix [files..] ``` | Positional Argument | Description | Type | Default | | ------------------- | ----------------------------- | ------- | ------- | | `files` | Files or glob pattern to fix. | `array` | `"."` | | Option | Description | Type | | ------------------- | ------------------- | --------- | | `--help`
`-h` | Show help | `boolean` | | `--version`
`-v` | Show version number | `boolean` | #### Subcommand: `ksc-eslint print-config` Print the effective ESLint configuration. Package-scoped by default, file-scoped if a file argument is provided. Use `@eslint/config-inspector` for a more detailed view. Usage: ```txt ksc-eslint print-config [file] ``` | Positional Argument | Description | Type | | ------------------- | ------------------------------------------------ | -------- | | `file` | File or glob pattern to print configuration for. | `string` | | Option | Description | Type | | ------------------- | ------------------- | --------- | | `--help`
`-h` | Show help | `boolean` | | `--version`
`-v` | Show version number | `boolean` | ### API The package also exports `fix`, `fixFile` functions for linting and fixing code programmatically, pre-configured with the shared ESLint configuration. ```typescript import { clearCache, fix, fixFile } from '@kitschpatrol/eslint-config' // Fix a string (defaults to TypeScript parser) const fixed = await fix('let x = 1\nconsole.log(x)\n') // Fix with a bare file extension for parser inference const withExtension = await fix(code, 'tsx') // Fix with ESLint options const withOptions = await fix(code, { react: true }) // Both file type and options const withBoth = await fix(code, 'tsx', { react: true }) // Fix a file in place with options await fixFile('./src/index.ts', { type: 'lib' }) // Clear cached ESLint module and instances clearCache() ``` Config is resolved using the shared `eslintConfig()` factory with `isInEditor: false`. Per-call options accept the same `OptionsConfig` shape as the factory. The ESLint module and instances are cached internally for performance across multiple calls. Use `clearCache()` to force re-initialization. ## Notes Regrettably the `eslint-config init --location package` option is not supported due to ESLint 9's deprecation of support for putting configuration in `package.json`. See ESLint discussion thread [18131](https://github.com/eslint/eslint/discussions/18131). ### Origins This config is a heavily modified variation on Anthony Fu's [@antfu/eslint-config](https://github.com/antfu/eslint-config). This package is a somewhat leaner approach intended to work with other tools wrapped behind a monolithic CLI instead of handling everything on its own. It mainly leverages the factory / type generation implementation from the original repo, which itself builds on Kevin Deng's [@sxzz/eslint-config](https://github.com/sxzz/eslint-config). See the [modification notes](./modification-notes.md) for more details on what's changed from Anthony's approach. ### References - [@antfu/eslint-config](https://github.com/antfu/eslint-config) - [@sxzz/eslint-config](https://github.com/sxzz/eslint-config) - [linting-setup-using-eslint](https://chris.lu/web_development/tutorials/next-js-static-mdx-blog/linting-setup-using-eslint) - On [prefer-repository-shorthand](https://github.com/JoshuaKGoldberg/eslint-plugin-package-json/issues/223) ## License [MIT](license.txt) © [Eric Mika](https://ericmika.com)