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* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// /!\ DO NOT MODIFY THIS FILE /!\
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// The only job of create-react-app is to init the repository and then
// forward all the commands to the local version of create-react-app.
//
// If you need to add a new command, please add it to the scripts/ folder.
//
// The only reason to modify this file is to add more warnings and
// troubleshooting information for the `create-react-app` command.
//
// Do not make breaking changes! We absolutely don't want to have to
// tell people to update their global version of create-react-app.
//
// Also be careful with new language features.
// This file must work on Node 10+.
//
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// /!\ DO NOT MODIFY THIS FILE /!\
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
'use strict';
const https = require('https');
const chalk = require('chalk');
const commander = require('commander');
const dns = require('dns');
const envinfo = require('envinfo');
const execSync = require('child_process').execSync;
const fs = require('fs-extra');
const hyperquest = require('hyperquest');
const prompts = require('prompts');
const os = require('os');
const path = require('path');
const semver = require('semver');
const spawn = require('cross-spawn');
const tmp = require('tmp');
const unpack = require('tar-pack').unpack;
const url = require('url');
const validateProjectName = require('validate-npm-package-name');
const packageJson = require('./package.json');
function isUsingYarn() {
return (process.env.npm_config_user_agent || '').indexOf('yarn') === 0;
}
let projectName;
function init() {
const program = new commander.Command(packageJson.name)
.version(packageJson.version)
.arguments('<project-directory>')
.usage(`${chalk.green('<project-directory>')} [options]`)
.action(name => {
projectName = name;
})
.option('--verbose', 'print additional logs')
.option('--info', 'print environment debug info')
.option(
'--scripts-version <alternative-package>',
'use a non-standard version of react-scripts'
)
.option(
'--template <path-to-template>',
'specify a template for the created project'
)
.option('--use-pnp')
.allowUnknownOption()
.on('--help', () => {
console.log(
` Only ${chalk.green('<project-directory>')} is required.`
);
console.log();
console.log(
` A custom ${chalk.cyan('--scripts-version')} can be one of:`
);
console.log(` - a specific npm version: ${chalk.green('0.8.2')}`);
console.log(` - a specific npm tag: ${chalk.green('@next')}`);
console.log(
` - a custom fork published on npm: ${chalk.green(
'my-react-scripts'
)}`
);
console.log(
` - a local path relative to the current working directory: ${chalk.green(
'file:../my-react-scripts'
)}`
);
console.log(
` - a .tgz archive: ${chalk.green(
'https://mysite.com/my-react-scripts-0.8.2.tgz'
)}`
);
console.log(
` - a .tar.gz archive: ${chalk.green(
'https://mysite.com/my-react-scripts-0.8.2.tar.gz'
)}`
);
console.log(
` It is not needed unless you specifically want to use a fork.`
);
console.log();
console.log(` A custom ${chalk.cyan('--template')} can be one of:`);
console.log(
` - a custom template published on npm: ${chalk.green(
'cra-template-typescript'
)}`
);
console.log(
` - a local path relative to the current working directory: ${chalk.green(
'file:../my-custom-template'
)}`
);
console.log(
` - a .tgz archive: ${chalk.green(
'https://mysite.com/my-custom-template-0.8.2.tgz'
)}`
);
console.log(
` - a .tar.gz archive: ${chalk.green(
'https://mysite.com/my-custom-template-0.8.2.tar.gz'
)}`
);
console.log();
console.log(
` If you have any problems, do not hesitate to file an issue:`
);
console.log(
` ${chalk.cyan(
'https://github.com/facebook/create-react-app/issues/new'
)}`
);
console.log();
})
.parse(process.argv);
if (program.info) {
console.log(chalk.bold('\nEnvironment Info:'));
console.log(
`\n current version of ${packageJson.name}: ${packageJson.version}`
);
console.log(` running from ${__dirname}`);
return envinfo
.run(
{
System: ['OS', 'CPU'],
Binaries: ['Node', 'npm', 'Yarn'],
Browsers: [
'Chrome',
'Edge',
'Internet Explorer',
'Firefox',
'Safari',
],
npmPackages: ['react', 'react-dom', 'react-scripts'],
npmGlobalPackages: ['create-react-app'],
},
{
duplicates: true,
showNotFound: true,
}
)
.then(console.log);
}
if (typeof projectName === 'undefined') {
console.error('Please specify the project directory:');
console.log(
` ${chalk.cyan(program.name())} ${chalk.green('<project-directory>')}`
);
console.log();
console.log('For example:');
console.log(
` ${chalk.cyan(program.name())} ${chalk.green('my-react-app')}`
);
console.log();
console.log(
`Run ${chalk.cyan(`${program.name()} --help`)} to see all options.`
);
process.exit(1);
}
// We first check the registry directly via the API, and if that fails, we try
// the slower `npm view [package] version` command.
//
// This is important for users in environments where direct access to npm is
// blocked by a firewall, and packages are provided exclusively via a private
// registry.
checkForLatestVersion()
.catch(() => {
try {
return execSync('npm view create-react-app version').toString().trim();
} catch (e) {
return null;
}
})
.then(latest => {
if (latest && semver.lt(packageJson.version, latest)) {
console.log();
console.error(
chalk.yellow(
`You are running \`create-react-app\` ${packageJson.version}, which is behind the latest release (${latest}).\n\n` +
'We recommend always using the latest version of create-react-app if possible.'
)
);
console.log();
console.log(
'The latest instructions for creating a new app can be found here:\n' +
'https://create-react-app.dev/docs/getting-started/'
);
console.log();
} else {
const useYarn = isUsingYarn();
createApp(
projectName,
program.verbose,
program.scriptsVersion,
program.template,
useYarn,
program.usePnp
);
}
});
}
function createApp(name, verbose, version, template, useYarn, usePnp) {
const unsupportedNodeVersion = !semver.satisfies(
// Coerce strings with metadata (i.e. `15.0.0-nightly`).
semver.coerce(process.version),
'>=14'
);
if (unsupportedNodeVersion) {
console.log(
chalk.yellow(
`You are using Node ${process.version} so the project will be bootstrapped with an old unsupported version of tools.\n\n` +
`Please update to Node 14 or higher for a better, fully supported experience.\n`
)
);
// Fall back to latest supported react-scripts on Node 4
version = 'react-scripts@0.9.x';
}
const root = path.resolve(name);
const appName = path.basename(root);
checkAppName(appName);
fs.ensureDirSync(name);
if (!isSafeToCreateProjectIn(root, name)) {
process.exit(1);
}
console.log();
console.log(`Creating a new React app in ${chalk.green(root)}.`);
console.log();
const packageJson = {
name: appName,
version: '0.1.0',
private: true,
};
fs.writeFileSync(
path.join(root, 'package.json'),
JSON.stringify(packageJson, null, 2) + os.EOL
);
const originalDirectory = process.cwd();
process.chdir(root);
if (!useYarn && !checkThatNpmCanReadCwd()) {
process.exit(1);
}
if (!useYarn) {
const npmInfo = checkNpmVersion();
if (!npmInfo.hasMinNpm) {
if (npmInfo.npmVersion) {
console.log(
chalk.yellow(
`You are using npm ${npmInfo.npmVersion} so the project will be bootstrapped with an old unsupported version of tools.\n\n` +
`Please update to npm 6 or higher for a better, fully supported experience.\n`
)
);
}
// Fall back to latest supported react-scripts for npm 3
version = 'react-scripts@0.9.x';
}
} else if (usePnp) {
const yarnInfo = checkYarnVersion();
if (yarnInfo.yarnVersion) {
if (!yarnInfo.hasMinYarnPnp) {
console.log(
chalk.yellow(
`You are using Yarn ${yarnInfo.yarnVersion} together with the --use-pnp flag, but Plug'n'Play is only supported starting from the 1.12 release.\n\n` +
`Please update to Yarn 1.12 or higher for a better, fully supported experience.\n`
)
);
// 1.11 had an issue with webpack-dev-middleware, so better not use PnP with it (never reached stable, but still)
usePnp = false;
}
if (!yarnInfo.hasMaxYarnPnp) {
console.log(
chalk.yellow(
'The --use-pnp flag is no longer necessary with yarn 2 and will be deprecated and removed in a future release.\n'
)
);
// 2 supports PnP by default and breaks when trying to use the flag
usePnp = false;
}
}
}
run(
root,
appName,
version,
verbose,
originalDirectory,
template,
useYarn,
usePnp
);
}
function install(root, useYarn, usePnp, dependencies, verbose, isOnline) {
return new Promise((resolve, reject) => {
let command;
let args;
if (useYarn) {
command = 'yarnpkg';
args = ['add', '--exact'];
if (!isOnline) {
args.push('--offline');
}
if (usePnp) {
args.push('--enable-pnp');
}
[].push.apply(args, dependencies);
// Explicitly set cwd() to work around issues like
// https://github.com/facebook/create-react-app/issues/3326.
// Unfortunately we can only do this for Yarn because npm support for
// equivalent --prefix flag doesn't help with this issue.
// This is why for npm, we run checkThatNpmCanReadCwd() early instead.
args.push('--cwd');
args.push(root);
if (!isOnline) {
console.log(chalk.yellow('You appear to be offline.'));
console.log(chalk.yellow('Falling back to the local Yarn cache.'));
console.log();
}
} else {
command = 'npm';
args = [
'install',
'--no-audit', // https://github.com/facebook/create-react-app/issues/11174
'--save',
'--save-exact',
'--loglevel',
'error',
].concat(dependencies);
if (usePnp) {
console.log(chalk.yellow("NPM doesn't support PnP."));
console.log(chalk.yellow('Falling back to the regular installs.'));
console.log();
}
}
if (verbose) {
args.push('--verbose');
}
const child = spawn(command, args, { stdio: 'inherit' });
child.on('close', code => {
if (code !== 0) {
reject({
command: `${command} ${args.join(' ')}`,
});
return;
}
resolve();
});
});
}
function run(
root,
appName,
version,
verbose,
originalDirectory,
template,
useYarn,
usePnp
) {
Promise.all([
getInstallPackage(version, originalDirectory),
getTemplateInstallPackage(template, originalDirectory),
]).then(([packageToInstall, templateToInstall]) => {
const allDependencies = ['react', 'react-dom', packageToInstall];
console.log('Installing packages. This might take a couple of minutes.');
Promise.all([
getPackageInfo(packageToInstall),
getPackageInfo(templateToInstall),
])
.then(([packageInfo, templateInfo]) =>
checkIfOnline(useYarn).then(isOnline => ({
isOnline,
packageInfo,
templateInfo,
}))
)
.then(({ isOnline, packageInfo, templateInfo }) => {
let packageVersion = semver.coerce(packageInfo.version);
const templatesVersionMinimum = '3.3.0';
// Assume compatibility if we can't test the version.
if (!semver.valid(packageVersion)) {
packageVersion = templatesVersionMinimum;
}
// Only support templates when used alongside new react-scripts versions.
const supportsTemplates = semver.gte(
packageVersion,
templatesVersionMinimum
);
if (supportsTemplates) {
allDependencies.push(templateToInstall);
} else if (template) {
console.log('');
console.log(
`The ${chalk.cyan(packageInfo.name)} version you're using ${
packageInfo.name === 'react-scripts' ? 'is not' : 'may not be'
} compatible with the ${chalk.cyan('--template')} option.`
);
console.log('');
}
console.log(
`Installing ${chalk.cyan('react')}, ${chalk.cyan(
'react-dom'
)}, and ${chalk.cyan(packageInfo.name)}${
supportsTemplates ? ` with ${chalk.cyan(templateInfo.name)}` : ''
}...`
);
console.log();
return install(
root,
useYarn,
usePnp,
allDependencies,
verbose,
isOnline
).then(() => ({
packageInfo,
supportsTemplates,
templateInfo,
}));
})
.then(async ({ packageInfo, supportsTemplates, templateInfo }) => {
const packageName = packageInfo.name;
const templateName = supportsTemplates ? templateInfo.name : undefined;
checkNodeVersion(packageName);
setCaretRangeForRuntimeDeps(packageName);
const pnpPath = path.resolve(process.cwd(), '.pnp.js');
const nodeArgs = fs.existsSync(pnpPath) ? ['--require', pnpPath] : [];
await executeNodeScript(
{
cwd: process.cwd(),
args: nodeArgs,
},
[root, appName, verbose, originalDirectory, templateName],
`
const init = require('${packageName}/scripts/init.js');
init.apply(null, JSON.parse(process.argv[1]));
`
);
if (version === 'react-scripts@0.9.x') {
console.log(
chalk.yellow(
`\nNote: the project was bootstrapped with an old unsupported version of tools.\n` +
`Please update to Node >=14 and npm >=6 to get supported tools in new projects.\n`
)
);
}
})
.catch(reason => {
console.log();
console.log('Aborting installation.');
if (reason.command) {
console.log(` ${chalk.cyan(reason.command)} has failed.`);
} else {
console.log(
chalk.red('Unexpected error. Please report it as a bug:')
);
console.log(reason);
}
console.log();
// On 'exit' we will delete these files from target directory.
const knownGeneratedFiles = ['package.json', 'node_modules'];
const currentFiles = fs.readdirSync(path.join(root));
currentFiles.forEach(file => {
knownGeneratedFiles.forEach(fileToMatch => {
// This removes all knownGeneratedFiles.
if (file === fileToMatch) {
console.log(`Deleting generated file... ${chalk.cyan(file)}`);
fs.removeSync(path.join(root, file));
}
});
});
const remainingFiles = fs.readdirSync(path.join(root));
if (!remainingFiles.length) {
// Delete target folder if empty
console.log(
`Deleting ${chalk.cyan(`${appName}/`)} from ${chalk.cyan(
path.resolve(root, '..')
)}`
);
process.chdir(path.resolve(root, '..'));
fs.removeSync(path.join(root));
}
console.log('Done.');
process.exit(1);
});
});
}
function getInstallPackage(version, originalDirectory) {
let packageToInstall = 'react-scripts';
const validSemver = semver.valid(version);
if (validSemver) {
packageToInstall += `@${validSemver}`;
} else if (version) {
if (version[0] === '@' && !version.includes('/')) {
packageToInstall += version;
} else if (version.match(/^file:/)) {
packageToInstall = `file:${path.resolve(
originalDirectory,
version.match(/^file:(.*)?$/)[1]
)}`;
} else {
// for tar.gz or alternative paths
packageToInstall = version;
}
}
const scriptsToWarn = [
{
name: 'react-scripts-ts',
message: chalk.yellow(
`The react-scripts-ts package is deprecated. TypeScript is now supported natively in Create React App. You can use the ${chalk.green(
'--template typescript'
)} option instead when generating your app to include TypeScript support. Would you like to continue using react-scripts-ts?`
),
},
];
for (const script of scriptsToWarn) {
if (packageToInstall.startsWith(script.name)) {
return prompts({
type: 'confirm',
name: 'useScript',
message: script.message,
initial: false,
}).then(answer => {
if (!answer.useScript) {
process.exit(0);
}
return packageToInstall;
});
}
}
return Promise.resolve(packageToInstall);
}
function getTemplateInstallPackage(template, originalDirectory) {
let templateToInstall = 'cra-template';
if (template) {
if (template.match(/^file:/)) {
templateToInstall = `file:${path.resolve(
originalDirectory,
template.match(/^file:(.*)?$/)[1]
)}`;
} else if (
template.includes('://') ||
template.match(/^.+\.(tgz|tar\.gz)$/)
) {
// for tar.gz or alternative paths
templateToInstall = template;
} else {
// Add prefix 'cra-template-' to non-prefixed templates, leaving any
// @scope/ and @version intact.
const packageMatch = template.match(/^(@[^/]+\/)?([^@]+)?(@.+)?$/);
const scope = packageMatch[1] || '';
const templateName = packageMatch[2] || '';
const version = packageMatch[3] || '';
if (
templateName === templateToInstall ||
templateName.startsWith(`${templateToInstall}-`)
) {
// Covers:
// - cra-template
// - @SCOPE/cra-template
// - cra-template-NAME
// - @SCOPE/cra-template-NAME
templateToInstall = `${scope}${templateName}${version}`;
} else if (version && !scope && !templateName) {
// Covers using @SCOPE only
templateToInstall = `${version}/${templateToInstall}`;
} else {
// Covers templates without the `cra-template` prefix:
// - NAME
// - @SCOPE/NAME
templateToInstall = `${scope}${templateToInstall}-${templateName}${version}`;
}
}
}
return Promise.resolve(templateToInstall);
}
function getTemporaryDirectory() {
return new Promise((resolve, reject) => {
// Unsafe cleanup lets us recursively delete the directory if it contains
// contents; by default it only allows removal if it's empty
tmp.dir({ unsafeCleanup: true }, (err, tmpdir, callback) => {
if (err) {
reject(err);
} else {
resolve({
tmpdir: tmpdir,
cleanup: () => {
try {
callback();
} catch (ignored) {
// Callback might throw and fail, since it's a temp directory the
// OS will clean it up eventually...
}
},
});
}
});
});
}
function extractStream(stream, dest) {
return new Promise((resolve, reject) => {
stream.pipe(
unpack(dest, err => {
if (err) {
reject(err);
} else {
resolve(dest);
}
})
);
});
}
// Extract package name from tarball url or path.
function getPackageInfo(installPackage) {
if (installPackage.match(/^.+\.(tgz|tar\.gz)$/)) {
return getTemporaryDirectory()
.then(obj => {
let stream;
if (/^http/.test(installPackage)) {
stream = hyperquest(installPackage);
} else {
stream = fs.createReadStream(installPackage);
}
return extractStream(stream, obj.tmpdir).then(() => obj);
})
.then(obj => {
const { name, version } = require(path.join(
obj.tmpdir,
'package.json'
));
obj.cleanup();
return { name, version };
})
.catch(err => {
// The package name could be with or without semver version, e.g. react-scripts-0.2.0-alpha.1.tgz
// However, this function returns package name only without semver version.
console.log(
`Could not extract the package name from the archive: ${err.message}`
);
const assumedProjectName = installPackage.match(
/^.+\/(.+?)(?:-\d+.+)?\.(tgz|tar\.gz)$/
)[1];
console.log(
`Based on the filename, assuming it is "${chalk.cyan(
assumedProjectName
)}"`
);
return Promise.resolve({ name: assumedProjectName });
});
} else if (installPackage.startsWith('git+')) {
// Pull package name out of git urls e.g:
// git+https://github.com/mycompany/react-scripts.git
// git+ssh://github.com/mycompany/react-scripts.git#v1.2.3
return Promise.resolve({
name: installPackage.match(/([^/]+)\.git(#.*)?$/)[1],
});
} else if (installPackage.match(/.+@/)) {
// Do not match @scope/ when stripping off @version or @tag
return Promise.resolve({
name: installPackage.charAt(0) + installPackage.substr(1).split('@')[0],
version: installPackage.split('@')[1],
});
} else if (installPackage.match(/^file:/)) {
const installPackagePath = installPackage.match(/^file:(.*)?$/)[1];
const { name, version } = require(path.join(
installPackagePath,
'package.json'
));
return Promise.resolve({ name, version });
}
return Promise.resolve({ name: installPackage });
}
function checkNpmVersion() {
let hasMinNpm = false;
let npmVersion = null;
try {
npmVersion = execSync('npm --version').toString().trim();
hasMinNpm = semver.gte(npmVersion, '6.0.0');
} catch (err) {
// ignore
}
return {
hasMinNpm: hasMinNpm,
npmVersion: npmVersion,
};
}
function checkYarnVersion() {
const minYarnPnp = '1.12.0';
const maxYarnPnp = '2.0.0';
let hasMinYarnPnp = false;
let hasMaxYarnPnp = false;
let yarnVersion = null;
try {
yarnVersion = execSync('yarnpkg --version').toString().trim();
if (semver.valid(yarnVersion)) {
hasMinYarnPnp = semver.gte(yarnVersion, minYarnPnp);
hasMaxYarnPnp = semver.lt(yarnVersion, maxYarnPnp);
} else {
// Handle non-semver compliant yarn version strings, which yarn currently
// uses for nightly builds. The regex truncates anything after the first
// dash. See #5362.
const trimmedYarnVersionMatch = /^(.+?)[-+].+$/.exec(yarnVersion);
if (trimmedYarnVersionMatch) {
const trimmedYarnVersion = trimmedYarnVersionMatch.pop();
hasMinYarnPnp = semver.gte(trimmedYarnVersion, minYarnPnp);
hasMaxYarnPnp = semver.lt(trimmedYarnVersion, maxYarnPnp);
}
}
} catch (err) {
// ignore
}
return {
hasMinYarnPnp: hasMinYarnPnp,
hasMaxYarnPnp: hasMaxYarnPnp,
yarnVersion: yarnVersion,
};
}
function checkNodeVersion(packageName) {
const packageJsonPath = path.resolve(
process.cwd(),
'node_modules',
packageName,
'package.json'
);
if (!fs.existsSync(packageJsonPath)) {
return;
}
const packageJson = require(packageJsonPath);
if (!packageJson.engines || !packageJson.engines.node) {
return;
}
if (!semver.satisfies(process.version, packageJson.engines.node)) {
console.error(
chalk.red(
'You are running Node %s.\n' +
'Create React App requires Node %s or higher. \n' +
'Please update your version of Node.'
),
process.version,
packageJson.engines.node
);
process.exit(1);
}
}
function checkAppName(appName) {
const validationResult = validateProjectName(appName);
if (!validationResult.validForNewPackages) {
console.error(
chalk.red(
`Cannot create a project named ${chalk.green(
`"${appName}"`
)} because of npm naming restrictions:\n`
)
);
[
...(validationResult.errors || []),
...(validationResult.warnings || []),
].forEach(error => {
console.error(chalk.red(` * ${error}`));
});
console.error(chalk.red('\nPlease choose a different project name.'));
process.exit(1);
}
// TODO: there should be a single place that holds the dependencies
const dependencies = ['react', 'react-dom', 'react-scripts'].sort();
if (dependencies.includes(appName)) {
console.error(
chalk.red(
`Cannot create a project named ${chalk.green(
`"${appName}"`
)} because a dependency with the same name exists.\n` +
`Due to the way npm works, the following names are not allowed:\n\n`
) +
chalk.cyan(dependencies.map(depName => ` ${depName}`).join('\n')) +
chalk.red('\n\nPlease choose a different project name.')
);
process.exit(1);
}
}
function makeCaretRange(dependencies, name) {
const version = dependencies[name];
if (typeof version === 'undefined') {
console.error(chalk.red(`Missing ${name} dependency in package.json`));
process.exit(1);
}
let patchedVersion = `^${version}`;
if (!semver.validRange(patchedVersion)) {
console.error(
`Unable to patch ${name} dependency version because version ${chalk.red(
version
)} will become invalid ${chalk.red(patchedVersion)}`
);
patchedVersion = version;
}
dependencies[name] = patchedVersion;
}
function setCaretRangeForRuntimeDeps(packageName) {
const packagePath = path.join(process.cwd(), 'package.json');
const packageJson = require(packagePath);
if (typeof packageJson.dependencies === 'undefined') {
console.error(chalk.red('Missing dependencies in package.json'));
process.exit(1);
}
const packageVersion = packageJson.dependencies[packageName];
if (typeof packageVersion === 'undefined') {
console.error(chalk.red(`Unable to find ${packageName} in package.json`));
process.exit(1);
}
makeCaretRange(packageJson.dependencies, 'react');
makeCaretRange(packageJson.dependencies, 'react-dom');
fs.writeFileSync(packagePath, JSON.stringify(packageJson, null, 2) + os.EOL);
}
// If project only contains files generated by GH, it’s safe.
// Also, if project contains remnant error logs from a previous
// installation, lets remove them now.
// We also special case IJ-based products .idea because it integrates with CRA:
// https://github.com/facebook/create-react-app/pull/368#issuecomment-243446094
function isSafeToCreateProjectIn(root, name) {
const validFiles = [
'.DS_Store',
'.git',
'.gitattributes',
'.gitignore',
'.gitlab-ci.yml',
'.hg',
'.hgcheck',
'.hgignore',
'.idea',
'.npmignore',
'.travis.yml',
'docs',
'LICENSE',
'README.md',
'mkdocs.yml',
'Thumbs.db',
];
// These files should be allowed to remain on a failed install, but then
// silently removed during the next create.
const errorLogFilePatterns = [
'npm-debug.log',
'yarn-error.log',
'yarn-debug.log',
];
const isErrorLog = file => {
return errorLogFilePatterns.some(pattern => file.startsWith(pattern));
};
const conflicts = fs
.readdirSync(root)
.filter(file => !validFiles.includes(file))
// IntelliJ IDEA creates module files before CRA is launched
.filter(file => !/\.iml$/.test(file))
// Don't treat log files from previous installation as conflicts
.filter(file => !isErrorLog(file));
if (conflicts.length > 0) {
console.log(
`The directory ${chalk.green(name)} contains files that could conflict:`
);
console.log();
for (const file of conflicts) {
try {
const stats = fs.lstatSync(path.join(root, file));
if (stats.isDirectory()) {
console.log(` ${chalk.blue(`${file}/`)}`);
} else {
console.log(` ${file}`);
}
} catch (e) {
console.log(` ${file}`);
}
}
console.log();
console.log(
'Either try using a new directory name, or remove the files listed above.'
);
return false;
}
// Remove any log files from a previous installation.
fs.readdirSync(root).forEach(file => {
if (isErrorLog(file)) {
fs.removeSync(path.join(root, file));
}
});
return true;
}
function getProxy() {
if (process.env.https_proxy) {
return process.env.https_proxy;
} else {
try {
// Trying to read https-proxy from .npmrc
let httpsProxy = execSync('npm config get https-proxy').toString().trim();
return httpsProxy !== 'null' ? httpsProxy : undefined;
} catch (e) {
return;
}
}
}
// See https://github.com/facebook/create-react-app/pull/3355
function checkThatNpmCanReadCwd() {
const cwd = process.cwd();
let childOutput = null;
try {
// Note: intentionally using spawn over exec since
// the problem doesn't reproduce otherwise.
// `npm config list` is the only reliable way I could find
// to reproduce the wrong path. Just printing process.cwd()
// in a Node process was not enough.
childOutput = spawn.sync('npm', ['config', 'list']).output.join('');
} catch (err) {
// Something went wrong spawning node.
// Not great, but it means we can't do this check.
// We might fail later on, but let's continue.
return true;
}
if (typeof childOutput !== 'string') {
return true;
}
const lines = childOutput.split('\n');
// `npm config list` output includes the following line:
// "; cwd = C:\path\to\current\dir" (unquoted)
// I couldn't find an easier way to get it.
const prefix = '; cwd = ';
const line = lines.find(line => line.startsWith(prefix));
if (typeof line !== 'string') {
// Fail gracefully. They could remove it.
return true;
}
const npmCWD = line.substring(prefix.length);
if (npmCWD === cwd) {
return true;
}
console.error(
chalk.red(
`Could not start an npm process in the right directory.\n\n` +
`The current directory is: ${chalk.bold(cwd)}\n` +
`However, a newly started npm process runs in: ${chalk.bold(
npmCWD
)}\n\n` +
`This is probably caused by a misconfigured system terminal shell.`
)
);
if (process.platform === 'win32') {
console.error(
chalk.red(`On Windows, this can usually be fixed by running:\n\n`) +
` ${chalk.cyan(
'reg'
)} delete "HKCU\\Software\\Microsoft\\Command Processor" /v AutoRun /f\n` +
` ${chalk.cyan(
'reg'
)} delete "HKLM\\Software\\Microsoft\\Command Processor" /v AutoRun /f\n\n` +
chalk.red(`Try to run the above two lines in the terminal.\n`) +
chalk.red(
`To learn more about this problem, read: https://blogs.msdn.microsoft.com/oldnewthing/20071121-00/?p=24433/`
)
);
}
return false;
}
function checkIfOnline(useYarn) {
if (!useYarn) {
// Don't ping the Yarn registry.
// We'll just assume the best case.
return Promise.resolve(true);
}
return new Promise(resolve => {
dns.lookup('registry.yarnpkg.com', err => {
let proxy;
if (err != null && (proxy = getProxy())) {
// If a proxy is defined, we likely can't resolve external hostnames.
// Try to resolve the proxy name as an indication of a connection.
dns.lookup(url.parse(proxy).hostname, proxyErr => {
resolve(proxyErr == null);
});
} else {
resolve(err == null);
}
});
});
}
function executeNodeScript({ cwd, args }, data, source) {
return new Promise((resolve, reject) => {
const child = spawn(
process.execPath,
[...args, '-e', source, '--', JSON.stringify(data)],
{ cwd, stdio: 'inherit' }
);
child.on('close', code => {
if (code !== 0) {
reject({
command: `node ${args.join(' ')}`,
});
return;
}
resolve();
});
});
}
function checkForLatestVersion() {
return new Promise((resolve, reject) => {
https
.get(
'https://registry.npmjs.org/-/package/create-react-app/dist-tags',
res => {
if (res.statusCode === 200) {
let body = '';
res.on('data', data => (body += data));
res.on('end', () => {
resolve(JSON.parse(body).latest);
});
} else {
reject();
}
}
)
.on('error', () => {
reject();
});
});
}
module.exports = {
init,
getTemplateInstallPackage,
};
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