60 lines
1.1 KiB
JavaScript
60 lines
1.1 KiB
JavaScript
// @ts-nocheck
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'use strict';
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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 ruleName = 'unicode-bom';
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const messages = ruleMessages(ruleName, {
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expected: 'Expected Unicode BOM',
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rejected: 'Unexpected Unicode BOM',
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});
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function rule(expectation) {
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return (root, result) => {
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const validOptions = validateOptions(result, ruleName, {
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actual: expectation,
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possible: ['always', 'never'],
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});
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if (
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!validOptions ||
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root.source.inline ||
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root.source.lang === 'object-literal' ||
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// Ignore HTML documents
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root.document !== undefined
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) {
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return;
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}
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const { hasBOM } = root.source.input;
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if (expectation === 'always' && !hasBOM) {
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report({
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result,
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ruleName,
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message: messages.expected,
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root,
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line: 1,
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});
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}
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if (expectation === 'never' && hasBOM) {
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report({
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result,
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ruleName,
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message: messages.rejected,
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root,
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line: 1,
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});
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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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