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feat: add sort-intersection-types rule
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| --- | ||
| title: sort-intersection-types | ||
| description: ESLint Plugin Perfectionist rule which enforce sorted intersection types in TypeScript | ||
| --- | ||
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| # sort-intersection-types | ||
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| 💼 This rule is enabled in the following [configs](/configs/): `recommended-alphabetical`, `recommended-line-length`, `recommended-natural`. | ||
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| 🔧 This rule is automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix). | ||
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| <!-- end auto-generated rule header --> | ||
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| ## 📖 Rule Details | ||
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| Enforce sorted intersection types in TypeScript. | ||
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| Adhering to the `sort-intersection-types` rule enables developers to ensure that intersection types are consistently sorted, resulting in cleaner and more maintainable code. This rule promotes a standardized ordering of intersection types, making it easier for developers to navigate and understand the structure of type intersections within the codebase. | ||
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| :::info Important | ||
| If you use the [`sort-type-constituents`](https://typescript-eslint.io/rules/sort-type-constituents) rule from the [`@typescript-eslint/eslint-plugin`](https://typescript-eslint.io) plugin, it is highly recommended to [disable it](https://eslint.org/docs/latest/use/configure/rules#using-configuration-files-1) to avoid conflicts. | ||
| ::: | ||
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| ## 💡 Examples | ||
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| ::: code-group | ||
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| <!-- prettier-ignore --> | ||
| ```ts [Alphabetical and Natural Sorting] | ||
| // ❌ Incorrect | ||
| type NetworkState = | ||
| & Failed | ||
| & LoadedFromCache | ||
| & Success | ||
| & DataLoading | ||
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| // ✅ Correct | ||
| type NetworkState = | ||
| & DataLoading | ||
| & Failed | ||
| & LoadedFromCache | ||
| & Success | ||
| ``` | ||
| <!-- prettier-ignore --> | ||
| ```ts [Sorting by Line Length] | ||
| // ❌ Incorrect | ||
| type NetworkState = | ||
| & Failed | ||
| & LoadedFromCache | ||
| & Success | ||
| & DataLoading | ||
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| // ✅ Correct | ||
| type NetworkState = | ||
| & LoadedFromCache | ||
| & DataLoading | ||
| & Success | ||
| & Failed | ||
| ``` | ||
| ::: | ||
| ## 🔧 Options | ||
| This rule accepts an options object with the following properties: | ||
| ```ts | ||
| interface Options { | ||
| type?: 'alphabetical' | 'natural' | 'line-length' | ||
| order?: 'asc' | 'desc' | ||
| 'ignore-case'?: boolean | ||
| } | ||
| ``` | ||
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| ### type | ||
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| <sub>(default: `'alphabetical'`)</sub> | ||
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| - `alphabetical` - sort alphabetically. | ||
| - `natural` - sort in natural order. | ||
| - `line-length` - sort by code line length. | ||
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| ### order | ||
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| <sub>(default: `'asc'`)</sub> | ||
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| - `asc` - enforce properties to be in ascending order. | ||
| - `desc` - enforce properties to be in descending order. | ||
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| ### ignore-case | ||
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| <sub>(default: `false`)</sub> | ||
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| Only affects alphabetical and natural sorting. When `true` the rule ignores the case-sensitivity of the order. | ||
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| ## ⚙️ Usage | ||
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| ::: code-group | ||
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| ```json [Legacy Config] | ||
| // .eslintrc | ||
| { | ||
| "plugins": ["perfectionist"], | ||
| "rules": { | ||
| "perfectionist/sort-intersection-types": [ | ||
| "error", | ||
| { | ||
| "type": "natural", | ||
| "order": "asc" | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| ``` | ||
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| ```js [Flat Config] | ||
| // eslint.config.js | ||
| import perfectionist from 'eslint-plugin-perfectionist' | ||
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| export default [ | ||
| { | ||
| plugins: { | ||
| perfectionist, | ||
| }, | ||
| rules: { | ||
| 'perfectionist/sort-intersection-types': [ | ||
| 'error', | ||
| { | ||
| type: 'natural', | ||
| order: 'asc', | ||
| }, | ||
| ], | ||
| }, | ||
| }, | ||
| ] | ||
| ``` | ||
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| ::: | ||
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| ## 🚀 Version | ||
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| This rule was introduced in v0.4.0. | ||
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| ## 📚 Resources | ||
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| - [Rule source](https://github.com/azat-io/eslint-plugin-perfectionist/blob/main/rules/sort-intersection-types.ts) | ||
| - [Test source](https://github.com/azat-io/eslint-plugin-perfectionist/blob/main/test/sort-intersection-types.test.ts) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import type { SortingNode } from '../typings' | ||
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| import { createEslintRule } from '../utils/create-eslint-rule' | ||
| import { toSingleLine } from '../utils/to-single-line' | ||
| import { rangeToDiff } from '../utils/range-to-diff' | ||
| import { isPositive } from '../utils/is-positive' | ||
| import { SortOrder, SortType } from '../typings' | ||
| import { sortNodes } from '../utils/sort-nodes' | ||
| import { makeFixes } from '../utils/make-fixes' | ||
| import { complete } from '../utils/complete' | ||
| import { pairwise } from '../utils/pairwise' | ||
| import { compare } from '../utils/compare' | ||
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| type MESSAGE_ID = 'unexpectedIntersectionTypesOrder' | ||
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| type Options = [ | ||
| Partial<{ | ||
| 'ignore-case': boolean | ||
| order: SortOrder | ||
| type: SortType | ||
| }>, | ||
| ] | ||
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| export const RULE_NAME = 'sort-intersection-types' | ||
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| export default createEslintRule<Options, MESSAGE_ID>({ | ||
| name: RULE_NAME, | ||
| meta: { | ||
| type: 'suggestion', | ||
| docs: { | ||
| description: 'enforce sorted intersection types', | ||
| }, | ||
| fixable: 'code', | ||
| schema: [ | ||
| { | ||
| type: 'object', | ||
| properties: { | ||
| type: { | ||
| enum: [ | ||
| SortType.alphabetical, | ||
| SortType.natural, | ||
| SortType['line-length'], | ||
| ], | ||
| default: SortType.alphabetical, | ||
| type: 'string', | ||
| }, | ||
| order: { | ||
| enum: [SortOrder.asc, SortOrder.desc], | ||
| default: SortOrder.asc, | ||
| type: 'string', | ||
| }, | ||
| 'ignore-case': { | ||
| type: 'boolean', | ||
| default: false, | ||
| }, | ||
| }, | ||
| additionalProperties: false, | ||
| }, | ||
| ], | ||
| messages: { | ||
| unexpectedIntersectionTypesOrder: | ||
| 'Expected "{{right}}" to come before "{{left}}"', | ||
| }, | ||
| }, | ||
| defaultOptions: [ | ||
| { | ||
| type: SortType.alphabetical, | ||
| order: SortOrder.asc, | ||
| }, | ||
| ], | ||
| create: context => ({ | ||
| TSIntersectionType: node => { | ||
| let options = complete(context.options.at(0), { | ||
| type: SortType.alphabetical, | ||
| 'ignore-case': false, | ||
| order: SortOrder.asc, | ||
| }) | ||
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| let nodes: SortingNode[] = node.types.map(type => ({ | ||
| group: | ||
| type.type === 'TSNullKeyword' || type.type === 'TSUndefinedKeyword' | ||
| ? 'nullable' | ||
| : 'unknown', | ||
| name: context.sourceCode.text.slice(...type.range), | ||
| size: rangeToDiff(type.range), | ||
| node: type, | ||
| })) | ||
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| pairwise(nodes, (left, right) => { | ||
| let compareValue = isPositive(compare(left, right, options)) | ||
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| if (compareValue) { | ||
| context.report({ | ||
| messageId: 'unexpectedIntersectionTypesOrder', | ||
| data: { | ||
| left: toSingleLine(left.name), | ||
| right: toSingleLine(right.name), | ||
| }, | ||
| node: right.node, | ||
| fix: fixer => { | ||
| let sortedNodes = sortNodes(nodes, options) | ||
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| return makeFixes(fixer, nodes, sortedNodes, context.sourceCode) | ||
| }, | ||
| }) | ||
| } | ||
| }) | ||
| }, | ||
| }), | ||
| }) |
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