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#!/usr/bin/env node
/**
 * 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
 */

'use strict';

/*::
import type {IncomingMessage} from 'https';
*/

// $FlowFixMe[untyped-import]
const {name, version: currentVersion} = require('./package.json');
const {spawn} = require('child_process');
const {get} = require('https');
const semver = require('semver');
const {URL} = require('url');
const {styleText} = require('util');

const deprecated = () => {
  throw new Error(
    'react-native/cli is deprecated, please use @react-native-community/cli instead',
  );
};

function findCommunityCli(startDir /*: string */ = process.cwd()) {
  // With isolated node_modules (eg pnpm), we won't be able to find
  // `@react-native-community/cli` starting from the `react-native` directory.
  // Instead, we should use the project root, which we assume to be the cwd.
  const options = {paths: [startDir]};
  const rncli = require.resolve('@react-native-community/cli', options);
  // $FlowFixMe[unsupported-syntax]
  return require(rncli);
}

function isMissingCliDependency(error /*: Error */) {
  return (
    // $FlowFixMe[prop-missing]
    error.code === 'MODULE_NOT_FOUND' &&
    /@react-native-community\/cli/.test(error.message)
  );
}

let cli /*: $ReadOnly<{
  bin: string,
  loadConfig: $FlowFixMe,
  run: () => void
}> */ = {
  bin: '/dev/null',
  loadConfig: deprecated,
  run: deprecated,
};

const isNpxRuntime = process.env.npm_lifecycle_event === 'npx';
const isInitCommand = process.argv[2] === 'init';
const DEFAULT_REGISTRY_HOST =
  process.env.npm_config_registry ?? 'https://registry.npmjs.org/';
const HEAD = '1000.0.0';

// We're going to deprecate the `init` command proxying requests to @react-native-community/cli transparently
// on December 31th, 2024 or 0.76 (whichever arrives first). This is part of work to decouple of community CLI from React Native core.
//
// See https://github.com/react-native-community/discussions-and-proposals/blob/main/proposals/0759-react-native-frameworks.md
const CLI_DEPRECATION_DATE = new Date('2024-12-31');

function getLatestVersion(
  registryHost /*: string */ = DEFAULT_REGISTRY_HOST,
) /*: Promise<string> */ {
  return new Promise((resolve, reject) => {
    const url = new URL(registryHost);
    url.pathname = 'react-native/latest';
    get(url.toString(), (resp /*: IncomingMessage */) => {
      const buffer = [];
      resp.on('data', data => buffer.push(data));
      resp.on('end', () => {
        try {
          resolve(JSON.parse(Buffer.concat(buffer).toString('utf8')).version);
        } catch (e) {
          reject(e);
        }
      });
    }).on('error', e => reject(e));
  });
}

/**
 * Warn when users are using `npx react-native init`, to raise awareness of the changes from RFC 0759.
 *
 * Phase 1
 *
 * @see https://github.com/react-native-community/discussions-and-proposals/tree/main/proposals/0759-react-native-frameworks.md
 */
function warnWhenRunningInit() {
  if (isInitCommand) {
    console.warn(
      `\nRunning: ${styleText(['grey', 'bold'], 'npx @react-native-community/cli init')}\n`,
    );
  }
}

/**
 * Warn more sternly that the ability to call `npx react-native init` is going away.
 *
 * Phase 2
 *
 * @see https://github.com/react-native-community/discussions-and-proposals/tree/main/proposals/0759-react-native-frameworks.md
 */
function warnWithDeprecationSchedule() {
  if (!isInitCommand) {
    return;
  }

  const daysRemaining = Math.ceil(
    (CLI_DEPRECATION_DATE.getTime() - new Date().getTime()) / 86_400_000,
  );

  const emphasis = (text /*: string */) =>
    daysRemaining < 10
      ? styleText(['bgRed', 'white', 'bold'], text)
      : daysRemaining < 30
        ? styleText(['red', 'bold'], text)
        : daysRemaining < 60
          ? styleText(['green', 'bold'], text)
          : styleText(['blueBright', 'bold'], text);

  console.warn(`
${styleText('yellow', '⚠️')} The \`init\` command is deprecated.
The behavior will be changed on ${styleText(['white', 'bold'], CLI_DEPRECATION_DATE.toLocaleDateString())} ${emphasis(`(${daysRemaining} day${daysRemaining > 1 ? 's' : ''})`)}.

- Switch to ${styleText(['grey', 'bold'], 'npx @react-native-community/cli init')} for the identical behavior.
- Refer to the documentation for information about alternative tools: ${styleText('dim', 'https://reactnative.dev/docs/getting-started')}`);
}

function warnWithDeprecated() {
  if (!isInitCommand) {
    return;
  }
  console.warn(`
🚨️ The \`init\` command is deprecated.

- Switch to ${styleText(['grey', 'bold'], 'npx @react-native-community/cli init')} for the identical behavior.
- Refer to the documentation for information about alternative tools: ${styleText('dim', 'https://reactnative.dev/docs/getting-started')}`);
}

function warnWithExplicitDependency(version /*: string */ = '*') {
  console.warn(`
${styleText('yellow', '⚠')}️ ${styleText(['dim'], 'react-native')} depends on ${styleText('dim', '@react-native-community/cli')} for cli commands. To fix update your ${styleText(['dim'], 'package.json')} to include:

${styleText(
  ['white', 'bold'],
  `
  "devDependencies": {
    "@react-native-community/cli": "latest",
  }
`,
)}

`);
}

/**
 * npx react-native -> @react-native-community/cli
 *
 * Will perform a version check and warning if you're not running the latest community cli when executed using npx. If
 * you know what you're doing, you can skip this check:
 *
 *  SKIP=true npx react-native ...
 *
 */
async function main() {
  if (
    isNpxRuntime &&
    !Boolean(process.env.SKIP) &&
    currentVersion !== HEAD &&
    isInitCommand
  ) {
    try {
      const latest = await getLatestVersion();
      // TODO: T184416093 When cli is deprecated, remove semver from package.json
      if (semver.lt(currentVersion, latest)) {
        const msg = `
  ${styleText(['bold', 'yellow'], 'WARNING:')} You should run ${styleText(
    ['white', 'bold'],
    'npx react-native@latest',
  )} to ensure you're always using the most current version of the CLI. NPX has cached version (${styleText(
    ['bold', 'yellow'],
    currentVersion,
  )}) != current release (${styleText(['bold', 'green'], latest)})
  `;
        console.warn(msg);
      }
    } catch (_) {
      // Ignore errors, since it's a nice to have warning
    }
  }

  const isDeprecated =
    CLI_DEPRECATION_DATE.getTime() <= new Date().getTime() ||
    currentVersion.startsWith('0.77');

  /**
   * This command is now deprecated. We will continue to proxy commands to @react-native-community/cli, but it
   * isn't supported anymore. We'll always show the warning.
   *
   * WARNING: Projects will have to have an explicit dependency on @react-native-community/cli to use the CLI.
   *
   * Phase 3
   *
   * @see https://github.com/react-native-community/discussions-and-proposals/tree/main/proposals/0759-react-native-frameworks.md
   */
  if (isInitCommand) {
    if (currentVersion !== HEAD && isDeprecated) {
      warnWithDeprecated();
      // We only exit if the user calls `init` and it's deprecated. All other cases should proxy to to @react-native-community/cli.
      // Be careful with this as it can break a lot of users.
      console.warn(`${styleText('green', 'Exiting...')}`);
      process.exit(1);
    } else if (
      currentVersion.startsWith('0.75') ||
      currentVersion.startsWith('0.76')
    ) {
      // We check deprecation schedule only for 0.75 and 0.76 and 0.77 is expected to land in Jan 2025.
      warnWithDeprecationSchedule();
    }
    warnWhenRunningInit();

    const proc = spawn(
      'npx',
      ['@react-native-community/cli', ...process.argv.slice(2)],
      {
        stdio: 'inherit',
      },
    );

    const code /*: number */ = await new Promise(resolve => {
      proc.on('exit', resolve);
    });
    process.exit(code);
  }

  try {
    return findCommunityCli().run(name);
  } catch (e) {
    if (isMissingCliDependency(e)) {
      warnWithExplicitDependency();
      process.exit(1);
    }
    throw e;
  }
}

if (require.main === module) {
  void main();
} else {
  try {
    cli = findCommunityCli();
  } catch (e) {
    // We silence @react-native-community/cli missing as it is no
    // longer a dependency
    if (!isMissingCliDependency(e)) {
      throw e;
    }
  }
}

module.exports = cli;

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