mirror of
https://github.com/zhigang1992/create-react-app.git
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80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
// @remove-on-eject-begin
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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// @remove-on-eject-end
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'use strict';
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const fs = require('fs');
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const paths = require('./paths');
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const NODE_ENV = process.env.NODE_ENV;
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if (!NODE_ENV) {
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throw new Error(
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'The NODE_ENV environment variable is required but was not specified.'
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);
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}
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// https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use
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var dotenvFiles = [
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`${paths.dotenv}.${NODE_ENV}.local`,
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`${paths.dotenv}.${NODE_ENV}`,
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`${paths.dotenv}.local`,
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paths.dotenv,
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];
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// Load environment variables from .env* files. Suppress warnings using silent
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// if this file is missing. dotenv will never modify any environment variables
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// that have already been set.
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// https://github.com/motdotla/dotenv
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dotenvFiles.forEach(dotenvFile => {
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if (fs.existsSync(dotenvFile)) {
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require('dotenv').config({
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path: dotenvFile,
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});
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}
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});
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// Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
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// injected into the application via DefinePlugin in Webpack configuration.
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const REACT_APP = /^REACT_APP_/i;
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function getClientEnvironment(publicUrl) {
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const raw = Object.keys(process.env)
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.filter(key => REACT_APP.test(key))
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.reduce(
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(env, key) => {
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env[key] = process.env[key];
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return env;
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},
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{
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// Useful for determining whether we’re running in production mode.
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// Most importantly, it switches React into the correct mode.
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NODE_ENV: process.env.NODE_ENV || 'development',
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// Useful for resolving the correct path to static assets in `public`.
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// For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
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// This should only be used as an escape hatch. Normally you would put
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// images into the `src` and `import` them in code to get their paths.
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PUBLIC_URL: publicUrl,
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}
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);
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// Stringify all values so we can feed into Webpack DefinePlugin
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const stringified = {
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'process.env': Object.keys(raw).reduce(
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(env, key) => {
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env[key] = JSON.stringify(raw[key]);
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return env;
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},
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{}
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),
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};
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return { raw, stringified };
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}
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module.exports = getClientEnvironment;
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