69 lines
1.6 KiB
JavaScript
69 lines
1.6 KiB
JavaScript
// @ts-nocheck
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'use strict';
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const mediaParser = require('postcss-media-query-parser').default;
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const report = require('../../utils/report');
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const ruleMessages = require('../../utils/ruleMessages');
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const validateOptions = require('../../utils/validateOptions');
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const valueParser = require('postcss-value-parser');
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const ruleName = 'no-duplicate-at-import-rules';
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const messages = ruleMessages(ruleName, {
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rejected: (atImport) => `Unexpected duplicate @import rule ${atImport}`,
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});
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function rule(actual) {
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return (root, result) => {
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const validOptions = validateOptions(result, ruleName, { actual });
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if (!validOptions) {
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return;
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}
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const imports = {};
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root.walkAtRules(/^import$/i, (atRule) => {
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const params = valueParser(atRule.params).nodes;
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if (!params.length) {
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return;
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}
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// extract uri from url() if exists
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const uri =
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params[0].type === 'function' && params[0].value === 'url'
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? params[0].nodes[0].value
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: params[0].value;
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// extract media queries if any
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const media = mediaParser(valueParser.stringify(params.slice(1)))
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.nodes.map((n) => n.value.replace(/\s/g, ''))
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.filter((n) => n.length);
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const isDuplicate = media.length
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? imports[uri] && media.some((q) => imports[uri].includes(q))
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: imports[uri];
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if (isDuplicate) {
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report({
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message: messages.rejected(uri),
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node: atRule,
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result,
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ruleName,
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});
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return;
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}
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if (!imports[uri]) imports[uri] = [];
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imports[uri] = imports[uri].concat(media);
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});
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};
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}
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rule.ruleName = ruleName;
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rule.messages = messages;
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module.exports = rule;
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