+++ /dev/null
-"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 ${atImport}`
-});
-
-const rule = function(actual) {
- return (root, result) => {
- const validOptions = validateOptions(result, ruleName, { actual });
- if (!validOptions) {
- return;
- }
-
- const imports = {};
-
- root.walkAtRules(/^import$/i, atRule => {
- const params = valueParser(atRule.params).nodes;
- if (!params.length) {
- return;
- }
-
- // extract uri from url() if exists
- const uri =
- params[0].type === "function" && params[0].value === "url"
- ? params[0].nodes[0].value
- : params[0].value;
- // extract media queries if any
- const media = mediaParser(valueParser.stringify(params.slice(1)))
- .nodes.map(n => n.value.replace(/\s/g, ""))
- .filter(n => n.length);
-
- const isDuplicate = media.length
- ? imports[uri] && media.some(q => imports[uri].indexOf(q) !== -1)
- : 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;