| 1 | 'use strict'; |
| 2 | |
| 3 | const fs = require('fs'); |
| 4 | const path = require('path'); |
| 5 | const paths = require('./paths'); |
| 6 | |
| 7 | // Make sure that including paths.js after env.js will read .env variables. |
| 8 | delete require.cache[require.resolve('./paths')]; |
| 9 | |
| 10 | const NODE_ENV = process.env.NODE_ENV; |
| 11 | if (!NODE_ENV) { |
| 12 | throw new Error( |
| 13 | 'The NODE_ENV environment variable is required but was not specified.' |
| 14 | ); |
| 15 | } |
| 16 | |
| 17 | // https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use |
| 18 | const dotenvFiles = [ |
| 19 | `${paths.dotenv}.${NODE_ENV}.local`, |
| 20 | // Don't include `.env.local` for `test` environment |
| 21 | // since normally you expect tests to produce the same |
| 22 | // results for everyone |
| 23 | NODE_ENV !== 'test' && `${paths.dotenv}.local`, |
| 24 | `${paths.dotenv}.${NODE_ENV}`, |
| 25 | paths.dotenv, |
| 26 | ].filter(Boolean); |
| 27 | |
| 28 | // Load environment variables from .env* files. Suppress warnings using silent |
| 29 | // if this file is missing. dotenv will never modify any environment variables |
| 30 | // that have already been set. Variable expansion is supported in .env files. |
| 31 | // https://github.com/motdotla/dotenv |
| 32 | // https://github.com/motdotla/dotenv-expand |
| 33 | dotenvFiles.forEach(dotenvFile => { |
| 34 | if (fs.existsSync(dotenvFile)) { |
| 35 | require('dotenv-expand')( |
| 36 | require('dotenv').config({ |
| 37 | path: dotenvFile, |
| 38 | }) |
| 39 | ); |
| 40 | } |
| 41 | }); |
| 42 | |
| 43 | // We support resolving modules according to `NODE_PATH`. |
| 44 | // This lets you use absolute paths in imports inside large monorepos: |
| 45 | // https://github.com/facebook/create-react-app/issues/253. |
| 46 | // It works similar to `NODE_PATH` in Node itself: |
| 47 | // https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders |
| 48 | // Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored. |
| 49 | // Otherwise, we risk importing Node.js core modules into an app instead of webpack shims. |
| 50 | // https://github.com/facebook/create-react-app/issues/1023#issuecomment-265344421 |
| 51 | // We also resolve them to make sure all tools using them work consistently. |
| 52 | const appDirectory = fs.realpathSync(process.cwd()); |
| 53 | process.env.NODE_PATH = (process.env.NODE_PATH || '') |
| 54 | .split(path.delimiter) |
| 55 | .filter(folder => folder && !path.isAbsolute(folder)) |
| 56 | .map(folder => path.resolve(appDirectory, folder)) |
| 57 | .join(path.delimiter); |
| 58 | |
| 59 | // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be |
| 60 | // injected into the application via DefinePlugin in webpack configuration. |
| 61 | const REACT_APP = /^REACT_APP_/i; |
| 62 | |
| 63 | function getClientEnvironment(publicUrl) { |
| 64 | const raw = Object.keys(process.env) |
| 65 | .filter(key => REACT_APP.test(key)) |
| 66 | .reduce( |
| 67 | (env, key) => { |
| 68 | env[key] = process.env[key]; |
| 69 | return env; |
| 70 | }, |
| 71 | { |
| 72 | // Useful for determining whether we’re running in production mode. |
| 73 | // Most importantly, it switches React into the correct mode. |
| 74 | NODE_ENV: process.env.NODE_ENV || 'development', |
| 75 | // Useful for resolving the correct path to static assets in `public`. |
| 76 | // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />. |
| 77 | // This should only be used as an escape hatch. Normally you would put |
| 78 | // images into the `src` and `import` them in code to get their paths. |
| 79 | PUBLIC_URL: publicUrl, |
| 80 | // We support configuring the sockjs pathname during development. |
| 81 | // These settings let a developer run multiple simultaneous projects. |
| 82 | // They are used as the connection `hostname`, `pathname` and `port` |
| 83 | // in webpackHotDevClient. They are used as the `sockHost`, `sockPath` |
| 84 | // and `sockPort` options in webpack-dev-server. |
| 85 | WDS_SOCKET_HOST: process.env.WDS_SOCKET_HOST, |
| 86 | WDS_SOCKET_PATH: process.env.WDS_SOCKET_PATH, |
| 87 | WDS_SOCKET_PORT: process.env.WDS_SOCKET_PORT, |
| 88 | // Whether or not react-refresh is enabled. |
| 89 | // It is defined here so it is available in the webpackHotDevClient. |
| 90 | FAST_REFRESH: process.env.FAST_REFRESH !== 'false', |
| 91 | } |
| 92 | ); |
| 93 | // Stringify all values so we can feed into webpack DefinePlugin |
| 94 | const stringified = { |
| 95 | 'process.env': Object.keys(raw).reduce((env, key) => { |
| 96 | env[key] = JSON.stringify(raw[key]); |
| 97 | return env; |
| 98 | }, {}), |
| 99 | }; |
| 100 | |
| 101 | return {raw, stringified}; |
| 102 | } |
| 103 | |
| 104 | module.exports = getClientEnvironment; |