45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
import Module from "module";
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import path from "path";
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let espreeCache = null;
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/** Checks if given path is linter path */
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function isLinterPath(p) {
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return (
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// ESLint 6 and above
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p.includes(`eslint${path.sep}lib${path.sep}linter${path.sep}linter.js`) ||
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// ESLint 5
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p.includes(`eslint${path.sep}lib${path.sep}linter.js`));
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}
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/**
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* Load `espree` from the loaded ESLint.
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* If the loaded ESLint was not found, just returns `require("espree")`.
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*/
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export function getEspree() {
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if (!espreeCache) {
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// Lookup the loaded eslint
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const req = Module.createRequire(import.meta.url);
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const linterPath = Object.keys(req.cache || {}).find(isLinterPath);
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if (linterPath) {
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try {
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espreeCache = Module.createRequire(linterPath)("espree");
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}
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catch {
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// ignore
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}
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}
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if (!espreeCache) {
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try {
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return req("espree");
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}
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catch {
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// ignore
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}
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}
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if (!espreeCache) {
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if (typeof require === "function")
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// eslint-disable-next-line @typescript-eslint/no-require-imports -- ignore
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espreeCache = require("espree");
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}
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}
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return espreeCache;
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}
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