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41 lines
927 B
41 lines
927 B
'use strict' |
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const crypto = require('crypto') |
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, moduleRequire = require('eslint-module-utils/module-require').default |
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, 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 = Object.assign({}, 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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