130 lines
3.6 KiB
JavaScript
130 lines
3.6 KiB
JavaScript
import babelParser from '@babel/parser';
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import * as parse5 from 'parse5';
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import swc from '@swc/core';
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import { traverseHtml } from '../utils/traverse-html.js';
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import { LogService } from './LogService.js';
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import { guardedSwcToBabel } from '../utils/guarded-swc-to-babel.js';
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/**
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* @typedef {import("@babel/types").File} File
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* @typedef {import("@swc/core").Module} SwcAstModule
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* @typedef {import("@babel/parser").ParserOptions} ParserOptions
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* @typedef {import('../../../types/index.js').PathFromSystemRoot} PathFromSystemRoot
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*/
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export class AstService {
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/**
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* Compiles an array of file paths using Babel.
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* @param {string} code
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* @param {ParserOptions} parserOptions
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* @returns {File}
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*/
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static _getBabelAst(code, parserOptions = {}) {
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const ast = babelParser.parse(code, {
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sourceType: 'module',
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plugins: [
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'importMeta',
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'dynamicImport',
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'classProperties',
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'exportDefaultFrom',
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'importAssertions',
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],
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...parserOptions,
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});
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return ast;
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}
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/**
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* Compiles an array of file paths using Babel.
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* @param {string} code
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* @param {ParserOptions} parserOptions
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* @returns {File}
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*/
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static _getSwcToBabelAst(code, parserOptions = {}) {
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if (this.fallbackToBabel) {
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return this._getBabelAst(code, parserOptions);
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}
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const ast = swc.parseSync(code, {
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syntax: 'typescript',
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// importAssertions: true,
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...parserOptions,
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});
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return guardedSwcToBabel(ast, code);
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}
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/**
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* Compiles an array of file paths using swc.
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* @param {string} code
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* @param {ParserOptions} parserOptions
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* @returns {SwcAstModule}
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*/
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static _getSwcAst(code, parserOptions = {}) {
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const ast = swc.parseSync(code, {
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syntax: 'typescript',
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target: 'es2022',
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...parserOptions,
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});
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return ast;
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}
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/**
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* Compensates for swc span bug: https://github.com/swc-project/swc/issues/1366#issuecomment-1516539812
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* @returns {number}
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*/
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static _getSwcOffset() {
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return swc.parseSync('').span.end;
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}
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/**
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* Combines all script tags as if it were one js file.
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* @param {string} htmlCode
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*/
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static getScriptsFromHtml(htmlCode) {
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const ast = parse5.parseFragment(htmlCode);
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/**
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* @type {string[]}
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*/
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const scripts = [];
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traverseHtml(ast, {
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/**
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* @param {{ node: { childNodes: { value: any; }[]; }; }} path
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*/
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script(path) {
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const code = path.node.childNodes[0] ? path.node.childNodes[0].value : '';
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scripts.push(code);
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},
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});
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return scripts;
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}
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/**
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* Returns the Babel AST
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* @param { string } code
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* @param { 'babel'|'swc-to-babel'|'swc'} astType
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* @param { {filePath?: PathFromSystemRoot} } options
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* @returns {File|undefined|SwcAstModule}
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*/
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// eslint-disable-next-line consistent-return
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static getAst(code, astType, { filePath } = {}) {
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// eslint-disable-next-line default-case
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try {
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if (astType === 'babel') {
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return this._getBabelAst(code);
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}
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if (astType === 'swc-to-babel') {
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return this._getSwcToBabelAst(code);
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}
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if (astType === 'swc') {
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return this._getSwcAst(code);
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}
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throw new Error(`astType "${astType}" not supported.`);
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} catch (e) {
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LogService.error(`Error when parsing "${filePath}":/n${e}`);
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}
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}
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}
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/**
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* This option can be used as a last resort when an swc AST combined with swc-to-babel, is backwards incompatible
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* (for instance when @babel/generator expects a different ast structure and fails).
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*/
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AstService.fallbackToBabel = false;
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