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42 lines
927 B
JavaScript
42 lines
927 B
JavaScript
'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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