Constnium/node_modules/eslint-plugin-import/memo-parser/index.js
2022-06-23 02:27:43 +02:00

41 lines
946 B
JavaScript

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