LaunchUtils.js

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict-local
 * @format
 */

import type {DebuggerShellPreparationResult} from '../';

const {spawn} = require('cross-spawn');

async function spawnAndGetStderr(
  command: string,
  args: string[],
): Promise<{
  code: number,
  stderr: string,
}> {
  return new Promise((resolve, reject) => {
    const child = spawn(command, args, {
      stdio: ['ignore', 'ignore', 'pipe'],
      encoding: 'utf8',
      windowsHide: true,
    });
    let stderr = '';
    child.stderr.on('data', data => {
      stderr += data;
    });
    child.on('error', error => {
      reject(error);
    });
    child.on('close', (code, signal) => {
      resolve({
        code,
        stderr,
      });
    });
  });
}

async function prepareDebuggerShellFromDotSlashFile(
  filePath: string,
): Promise<DebuggerShellPreparationResult> {
  const {code, stderr} = await spawnAndGetStderr(require('fb-dotslash'), [
    '--',
    'fetch',
    filePath,
  ]);
  if (code === 0) {
    return {code: 'success'};
  }
  if (
    stderr.includes('dotslash error') &&
    stderr.includes('no providers succeeded')
  ) {
    if (stderr.includes('failed to verify artifact')) {
      return {
        code: 'possible_corruption',
        humanReadableMessage:
          'Failed to verify the latest version of React Native DevTools. ' +
          'Using a fallback version instead. ',
        verboseInfo: stderr,
      };
    }
    return {
      code: 'likely_offline',
      humanReadableMessage:
        'Failed to download the latest version of React Native DevTools. ' +
        'Using a fallback version instead. ' +
        'Connect to the internet or check your network settings.',
      verboseInfo: stderr,
    };
  }
  if (
    stderr.includes('dotslash error') &&
    stderr.includes('platform not supported')
  ) {
    return {
      code: 'platform_not_supported',
      humanReadableMessage:
        'The latest version of React Native DevTools is not supported on this platform. ' +
        'Using a fallback version instead.',
      verboseInfo: stderr,
    };
  }
  return {
    code: 'unexpected_error',
    humanReadableMessage:
      'An unexpected error occurred while installing the latest version of React Native DevTools. ' +
      'Using a fallback version instead.',
    verboseInfo: stderr,
  };
}

export {prepareDebuggerShellFromDotSlashFile};