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- 'use strict';
- const fs = require('fs');
- const path = require('path');
- const paths = require('./paths');
- const chalk = require('react-dev-utils/chalk');
- /**
- * Get the baseUrl of a compilerOptions object.
- *
- * @param {Object} options
- */
- function getAdditionalModulePaths(options = {}) {
- const baseUrl = options.baseUrl;
- // We need to explicitly check for null and undefined (and not a falsy value) because
- // TypeScript treats an empty string as `.`.
- if (baseUrl == null) {
- // If there's no baseUrl set we respect NODE_PATH
- // Note that NODE_PATH is deprecated and will be removed
- // in the next major release of create-react-app.
- const nodePath = process.env.NODE_PATH || '';
- return nodePath.split(path.delimiter).filter(Boolean);
- }
- const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
- // We don't need to do anything if `baseUrl` is set to `node_modules`. This is
- // the default behavior.
- if (path.relative(paths.appNodeModules, baseUrlResolved) === '') {
- return null;
- }
- // Allow the user set the `baseUrl` to `appSrc`.
- if (path.relative(paths.appSrc, baseUrlResolved) === '') {
- return [paths.appSrc];
- }
- // Otherwise, throw an error.
- throw new Error(
- chalk.red.bold(
- "Your project's `baseUrl` can only be set to `src` or `node_modules`." +
- ' Create React App does not support other values at this time.'
- )
- );
- }
- function getModules() {
- // Check if TypeScript is setup
- const hasTsConfig = fs.existsSync(paths.appTsConfig);
- const hasJsConfig = fs.existsSync(paths.appJsConfig);
- if (hasTsConfig && hasJsConfig) {
- throw new Error(
- 'You have both a tsconfig.json and a jsconfig.json. If you are using TypeScript please remove your jsconfig.json file.'
- );
- }
- let config;
- // If there's a tsconfig.json we assume it's a
- // TypeScript project and set up the config
- // based on tsconfig.json
- if (hasTsConfig) {
- config = require(paths.appTsConfig);
- // Otherwise we'll check if there is jsconfig.json
- // for non TS projects.
- } else if (hasJsConfig) {
- config = require(paths.appJsConfig);
- }
- config = config || {};
- const options = config.compilerOptions || {};
- const additionalModulePaths = getAdditionalModulePaths(options);
- return {
- additionalModulePaths: additionalModulePaths,
- hasTsConfig,
- };
- }
- module.exports = getModules();
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