42 lines
941 B
JavaScript
42 lines
941 B
JavaScript
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'use strict';
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const crypto = require('crypto');
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const moduleRequire = require('eslint-module-utils/module-require').default;
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const hashObject = require('eslint-module-utils/hash').hashObject;
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const cache = new Map();
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// must match ESLint default options or we'll miss the cache every time
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const parserOptions = {
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loc: true,
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range: true,
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raw: true,
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tokens: true,
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comment: true,
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attachComment: true,
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};
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exports.parse = function parse(content, options) {
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options = { ...options, ...parserOptions };
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if (!options.filePath) {
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throw new Error('no file path provided!');
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}
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const keyHash = crypto.createHash('sha256');
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keyHash.update(content);
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hashObject(options, keyHash);
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const key = keyHash.digest('hex');
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let ast = cache.get(key);
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if (ast != null) { return ast; }
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const realParser = moduleRequire(options.parser);
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ast = realParser.parse(content, options);
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cache.set(key, ast);
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return ast;
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};
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