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