'use strict';
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var path = require('path');
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var fs = require('fs');
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var JSON5 = require('json5');
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var pathExists = require('path-exists');
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var INFINITY = 1 / 0;
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var BABELRC_FILENAME = '.babelrc';
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var BABELRC_JS_FILENAME = '.babelrc.js';
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var BABEL_CONFIG_JS_FILENAME = 'babel.config.js';
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var PACKAGE_FILENAME = 'package.json';
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var nullConf = { file: null, config: null };
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function getBabelJsConfig(file) {
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// eslint-disable-next-line global-require, import/no-dynamic-require
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var configModule = require(file);
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if (typeof configModule === 'function') {
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return configModule();
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}
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// eslint-disable-next-line no-underscore-dangle
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return configModule && configModule.__esModule ? configModule.default : configModule;
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}
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function asyncFind(resolve, dir, depth) {
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if (depth < 0) {
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return resolve(nullConf);
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}
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var babelrc = path.join(dir, BABELRC_FILENAME);
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return pathExists(babelrc).then(function (exists) {
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if (exists) {
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fs.readFile(babelrc, 'utf8', function (err, data) {
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if (!err) {
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resolve({
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file: babelrc,
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config: JSON5.parse(data)
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});
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}
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});
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}
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return exists;
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}).then(function (exists) {
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if (!exists) {
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var babelJSrc = path.join(dir, BABELRC_JS_FILENAME);
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return pathExists(babelJSrc).then(function (ex) {
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if (ex) {
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var config = getBabelJsConfig(babelJSrc);
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resolve({
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file: babelJSrc,
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config
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});
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}
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});
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}
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return exists;
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}).then(function (exists) {
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if (!exists) {
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var packageFile = path.join(dir, PACKAGE_FILENAME);
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return pathExists(packageFile).then(function (ex) {
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if (ex) {
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fs.readFile(packageFile, 'utf8', function (err, data) {
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var packageJson = JSON.parse(data);
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if (packageJson.babel) {
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resolve({
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file: packageFile,
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config: packageJson.babel
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});
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}
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});
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}
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});
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}
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return exists;
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}).then(function (exists) {
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if (!exists) {
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var babelConfigJSrc = path.join(dir, BABEL_CONFIG_JS_FILENAME);
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return pathExists(babelConfigJSrc).then(function (ex) {
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if (ex) {
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var config = getBabelJsConfig(babelConfigJSrc);
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resolve({
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file: babelConfigJSrc,
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config
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});
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}
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});
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}
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return exists;
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}).then(function (exists) {
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if (!exists) {
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var nextDir = path.dirname(dir);
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if (nextDir === dir) {
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resolve(nullConf);
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} else {
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asyncFind(resolve, nextDir, depth - 1);
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}
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}
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});
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}
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module.exports = function findBabelConfig(start) {
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var depth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : INFINITY;
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if (!start) {
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return new Promise(function (resolve) {
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return resolve(nullConf);
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});
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}
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var dir = path.isAbsolute(start) ? start : path.join(process.cwd(), start);
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return new Promise(function (resolve) {
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asyncFind(resolve, dir, depth);
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});
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};
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module.exports.sync = function findBabelConfigSync(start) {
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var depth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : INFINITY;
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if (!start) {
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return nullConf;
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}
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var dir = path.isAbsolute(start) ? start : path.join(process.cwd(), start);
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var loopLeft = depth;
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// eslint-disable-next-line no-cond-assign
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do {
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var babelrc = path.join(dir, BABELRC_FILENAME);
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if (pathExists.sync(babelrc)) {
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var babelrcContent = fs.readFileSync(babelrc, 'utf8');
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return {
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file: babelrc,
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config: JSON5.parse(babelrcContent)
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};
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}
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var babelJSrc = path.join(dir, BABELRC_JS_FILENAME);
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if (pathExists.sync(babelJSrc)) {
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var config = getBabelJsConfig(babelJSrc);
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return {
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file: babelJSrc,
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config
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};
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}
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var babelConfigJSrc = path.join(dir, BABEL_CONFIG_JS_FILENAME);
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if (pathExists.sync(babelConfigJSrc)) {
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var _config = getBabelJsConfig(babelConfigJSrc);
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return {
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file: babelConfigJSrc,
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config: _config
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};
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}
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var packageFile = path.join(dir, PACKAGE_FILENAME);
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if (pathExists.sync(packageFile)) {
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var packageContent = fs.readFileSync(packageFile, 'utf8');
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var packageJson = JSON.parse(packageContent);
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if (packageJson.babel) {
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return {
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file: packageFile,
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config: packageJson.babel
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};
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}
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}
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if (loopLeft === 0) {
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return nullConf;
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}
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loopLeft -= 1;
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} while (dir !== (dir = path.dirname(dir)));
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return nullConf;
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};
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