function run()

in packages/create-react-kotlin-app/createReactApp.js [245:353]

• 96 lines of code
• 7 McCabe index (conditional complexity)

function run(
  root,
  appName,
  version,
  verbose,
  originalDirectory,
  template,
  useYarn
) {
  const packageToInstall = getInstallPackage(version);
  const allDependencies = ['react', 'react-dom', packageToInstall];

  console.log('Installing packages. This might take a couple minutes.');
  getPackageName(packageToInstall)
    .then((packageName) =>
      checkIfOnline(useYarn).then((isOnline) => ({
        isOnline: isOnline,
        packageName: packageName,
      }))
    )
    .then((info) => {
      const isOnline = info.isOnline;
      const packageName = info.packageName;
      console.log(
        `Installing ${chalk.cyan('react')}, ${chalk.cyan(
          'react-dom'
        )}, and ${chalk.cyan(packageName)}...`
      );
      console.log();

      return install(useYarn, allDependencies, verbose, isOnline).then(
        () => packageName
      );
    })
    .then((packageName) => {
      checkNodeVersion(packageName);

      // Since react-scripts has been installed with --save
      // we need to move it into devDependencies and rewrite package.json
      // also ensure react dependencies have caret version range
      fixDependencies(packageName);

      const scriptsPath = path.resolve(
        process.cwd(),
        'node_modules',
        packageName,
        'scripts',
        'init.js'
      );
      const init = require(scriptsPath);
      init(root, appName, verbose, originalDirectory, template);

      if (version === 'react-scripts@0.9.x') {
        console.log(
          chalk.yellow(
            `\nNote: the project was boostrapped with an old unsupported version of tools.\n` +
              `Please update to Node >=6 and npm >=3 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',
        'npm-debug.log',
        'yarn-error.log',
        'yarn-debug.log',
        'node_modules',
      ];
      const currentFiles = fs.readdirSync(path.join(root));
      currentFiles.forEach((file) => {
        knownGeneratedFiles.forEach((fileToMatch) => {
          // This will catch `(npm-debug|yarn-error|yarn-debug).log*` files
          // and the rest of knownGeneratedFiles.
          if (
            (fileToMatch.match(/.log/g) && file.indexOf(fileToMatch) === 0) ||
            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);
    });
}