feat: Add estree-toolkit as a JS transformer, upgrade meriyah

website/package.json

@@ -92,6 +92,7 @@
  "eslint4": "npm:eslint@^4",
  "espree": "^6.2.1",
  "esprima": "^4.0.1",
+ "estree-toolkit": "^1.2.5",
  "filbert": "^0.1.20",
  "flow-parser": "^0.144.0",
  "font-awesome": "^4.5.0",
@@ -112,7 +113,7 @@
  "lodash.isequal": "^4.5.0",
  "luaparse": "^0.3.0",
  "lucene": "^2.1.1",
- "meriyah": "^1.9.12",
+ "meriyah": "^4.2.0",
  "parse5": "^6.0.0",
  "parse5-htmlparser2-tree-adapter": "^6.0.0",
  "pbkit": "^0.0.12",

website/src/parsers/js/transformers/estree-toolkit/codeExample.txt

@@ -0,0 +1,19 @@
+export default function transform(code, { estreeToolkit, parsers }) {
+ const {
+ builders: b,
+ is,
+ traverse,
+ utils
+ } = estreeToolkit;
+
+ // There are many parsers, use any of them to generate an AST
+ const ast = parsers.meriyah.parseModule(code);
+
+ traverse(ast, {
+ Identifier(path) {
+ path.node.name = path.node.name.split('').reverse().join('');
+ }
+ });
+
+ return ast;
+}

website/src/parsers/js/transformers/estree-toolkit/index.js

@@ -0,0 +1,59 @@
+import compileModule from '../../../utils/compileModule';
+import pkg from 'estree-toolkit/package.json';
+
+const ID = 'estree-toolkit';
+
+export default {
+ id: ID,
+ displayName: ID,
+ version: pkg.version,
+ homepage: pkg.homepage || 'https://github.com/sarsamurmu/estree-toolkit',
+
+ defaultParserID: 'meriyah',
+
+ loadTransformer(callback) {
+ require(
+ [
+ '../../../transpilers/babel',
+ 'estree-toolkit',
+ 'recast',
+ 'acorn',
+ 'espree',
+ 'esprima',
+ 'meriyah',
+ 'seafox',
+ 'tenko',
+ ],
+ (transpile, estreeToolkit, recast, acorn, espree, esprima, meriyah, seafox, tenko) => {
+ callback({
+ transpile: transpile.default,
+ estreeToolkit,
+ recast,
+ parsers: { acorn, espree, esprima, meriyah, seafox, tenko },
+ });
+ },
+ );
+ },
+
+ transform(
+ { transpile, estreeToolkit, recast, parsers },
+ transformCode,
+ code,
+ ) {
+ transformCode = transpile(transformCode);
+ const transformModule = compileModule( // eslint-disable-line no-shadow
+ transformCode,
+ );
+ const transform = transformModule.__esModule ?
+ transformModule.default :
+ transformModule;
+
+ const ast = transform(code, { estreeToolkit, parsers });
+
+ if (ast == null) {
+ throw new Error('`transform` function must return an AST object');
+ }
+
+ return recast.print(ast);
+ },
+};