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configuration.cjs
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configuration.cjs
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const babel = require("./babel-core.cjs");
/**
* Merge user supplied estree plugin options to default estree plugin options
*
* @param {*} babelOptions
* @returns {Array} Merged parser plugin descriptors
*/
function getParserPlugins(babelOptions) {
const babelParserPlugins = babelOptions.parserOpts?.plugins ?? [];
// todo: enable classFeatures when it is supported by ESLint
const estreeOptions = { classFeatures: false };
for (const plugin of babelParserPlugins) {
if (Array.isArray(plugin) && plugin[0] === "estree") {
Object.assign(estreeOptions, plugin[1]);
break;
}
}
// estree must be the first parser plugin to work with other parser plugins
return [["estree", estreeOptions], ...babelParserPlugins];
}
function normalizeParserOptions(options) {
return {
sourceType: options.sourceType,
filename: options.filePath,
...options.babelOptions,
parserOpts: {
allowImportExportEverywhere: options.allowImportExportEverywhere,
allowReturnOutsideFunction: true,
allowSuperOutsideMethod: true,
...options.babelOptions.parserOpts,
plugins: getParserPlugins(options.babelOptions),
// skip comment attaching for parsing performance
attachComment: false,
ranges: true,
tokens: true,
},
caller: {
name: "@babel/eslint-parser",
...options.babelOptions.caller,
},
};
}
function validateResolvedConfig(config, options, parseOptions) {
if (config !== null) {
if (options.requireConfigFile !== false) {
if (!config.hasFilesystemConfig()) {
let error = `No Babel config file detected for ${config.options.filename}. Either disable config file checking with requireConfigFile: false, or configure Babel so that it can find the config files.`;
if (config.options.filename.includes("node_modules")) {
error += `\nIf you have a .babelrc.js file or use package.json#babel, keep in mind that it's not used when parsing dependencies. If you want your config to be applied to your whole app, consider using babel.config.js or babel.config.json instead.`;
}
throw new Error(error);
}
}
if (config.options) return config.options;
}
return getDefaultParserOptions(parseOptions);
}
function getDefaultParserOptions(options) {
return {
plugins: [],
...options,
babelrc: false,
configFile: false,
browserslistConfigFile: false,
ignore: null,
only: null,
};
}
exports.normalizeBabelParseConfig = async function (options) {
const parseOptions = normalizeParserOptions(options);
const config = await babel.loadPartialConfigAsync(parseOptions);
return validateResolvedConfig(config, options, parseOptions);
};
exports.normalizeBabelParseConfigSync = function (options) {
const parseOptions = normalizeParserOptions(options);
const config = babel.loadPartialConfigSync(parseOptions);
return validateResolvedConfig(config, options, parseOptions);
};