| 'use strict'; |
| |
| const mediaParser = require('postcss-media-query-parser').default; |
| const report = require('../../utils/report'); |
| const ruleMessages = require('../../utils/ruleMessages'); |
| const validateOptions = require('../../utils/validateOptions'); |
| const valueParser = require('postcss-value-parser'); |
| |
| const ruleName = 'no-duplicate-at-import-rules'; |
| |
| const messages = ruleMessages(ruleName, { |
| rejected: (atImport) => `Unexpected duplicate @import rule ${atImport}`, |
| }); |
| |
| /** @type {import('stylelint').Rule} */ |
| const rule = (primary) => { |
| return (root, result) => { |
| const validOptions = validateOptions(result, ruleName, { actual: primary }); |
| |
| if (!validOptions) { |
| return; |
| } |
| |
| /** @type {Record<string, string[]>} */ |
| const imports = {}; |
| |
| root.walkAtRules(/^import$/i, (atRule) => { |
| const [firstParam, ...restParams] = valueParser(atRule.params).nodes; |
| |
| if (!firstParam) { |
| return; |
| } |
| |
| // extract uri from url() if exists |
| const uri = |
| firstParam.type === 'function' && firstParam.value === 'url' |
| ? firstParam.nodes[0].value |
| : firstParam.value; |
| |
| // extract media queries if any |
| const media = (mediaParser(valueParser.stringify(restParams)).nodes || []) |
| .map((n) => n.value.replace(/\s/g, '')) |
| .filter((n) => n.length); |
| |
| const isDuplicate = media.length |
| ? imports[uri] && media.some((q) => imports[uri].includes(q)) |
| : imports[uri]; |
| |
| if (isDuplicate) { |
| report({ |
| message: messages.rejected(uri), |
| node: atRule, |
| result, |
| ruleName, |
| }); |
| |
| return; |
| } |
| |
| if (!imports[uri]) imports[uri] = []; |
| |
| imports[uri] = imports[uri].concat(media); |
| }); |
| }; |
| }; |
| |
| rule.ruleName = ruleName; |
| rule.messages = messages; |
| module.exports = rule; |