react-native/packager/packager.js

336 lines
9.8 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
'use strict';
var fs = require('fs');
var path = require('path');
var childProcess = require('child_process');
var http = require('http');
var isAbsolutePath = require('absolute-path');
var getFlowTypeCheckMiddleware = require('./getFlowTypeCheckMiddleware');
if (!fs.existsSync(path.resolve(__dirname, '..', 'node_modules'))) {
console.log(
'\n' +
'Could not find dependencies.\n' +
'Ensure dependencies are installed - ' +
'run \'npm install\' from project root.\n'
);
process.exit();
}
var chalk = require('chalk');
var connect = require('connect');
var ReactPackager = require('./react-packager');
var blacklist = require('./blacklist.js');
var checkNodeVersion = require('./checkNodeVersion');
var formatBanner = require('./formatBanner');
var launchEditor = require('./launchEditor.js');
var parseCommandLine = require('./parseCommandLine.js');
var webSocketProxy = require('./webSocketProxy.js');
var options = parseCommandLine([{
command: 'port',
default: 8081,
type: 'string',
}, {
command: 'root',
type: 'string',
description: 'add another root(s) to be used by the packager in this project',
}, {
command: 'assetRoots',
type: 'string',
description: 'specify the root directories of app assets'
}, {
command: 'skipflow',
description: 'Disable flow checks'
}, {
command: 'nonPersistent',
description: 'Disable file watcher'
}, {
command: 'transformer',
type: 'string',
default: require.resolve('./transformer.js'),
description: 'Specify a custom transformer to be used (absolute path)'
}, {
command: 'resetCache',
description: 'Removes cached files',
default: false,
}, {
command: 'reset-cache',
description: 'Removes cached files',
default: false,
}]);
if (options.projectRoots) {
if (!Array.isArray(options.projectRoots)) {
options.projectRoots = options.projectRoots.split(',');
}
} else {
// match on either path separator
if (__dirname.match(/node_modules[\/\\]react-native[\/\\]packager$/)) {
// packager is running from node_modules of another project
options.projectRoots = [path.resolve(__dirname, '../../..')];
} else if (__dirname.match(/Pods\/React\/packager$/)) {
// packager is running from node_modules of another project
options.projectRoots = [path.resolve(__dirname, '../../..')];
} else {
options.projectRoots = [path.resolve(__dirname, '..')];
}
}
if (options.root) {
if (!Array.isArray(options.root)) {
options.root = options.root.split(',');
}
options.root.forEach(function(root) {
options.projectRoots.push(path.resolve(root));
});
}
if (options.assetRoots) {
if (!Array.isArray(options.assetRoots)) {
options.assetRoots = options.assetRoots.split(',').map(function (dir) {
return path.resolve(process.cwd(), dir);
});
}
} else {
// match on either path separator
if (__dirname.match(/node_modules[\/\\]react-native[\/\\]packager$/)) {
options.assetRoots = [path.resolve(__dirname, '../../..')];
} else if (__dirname.match(/Pods\/React\/packager$/)) {
options.assetRoots = [path.resolve(__dirname, '../../..')];
} else {
options.assetRoots = [path.resolve(__dirname, '..')];
}
}
checkNodeVersion();
console.log(formatBanner(
'Running packager on port ' + options.port + '.\n'+
'\n' +
'Keep this packager running while developing on any JS projects. Feel free ' +
'to close this tab and run your own packager instance if you prefer.\n' +
'\n' +
'https://github.com/facebook/react-native', {
marginLeft: 1,
marginRight: 1,
paddingBottom: 1,
})
);
console.log(
'Looking for JS files in\n ',
chalk.dim(options.projectRoots.join('\n ')),
'\n'
);
process.on('uncaughtException', function(e) {
if (e.code === 'EADDRINUSE') {
console.log(
chalk.bgRed.bold(' ERROR '),
chalk.red('Packager can\'t listen on port', chalk.bold(options.port))
);
console.log('Most likely another process is already using this port');
console.log('Run the following command to find out which process:');
console.log('\n ', chalk.bold('lsof -n -i4TCP:' + options.port), '\n');
console.log('You can either shut down the other process:');
console.log('\n ', chalk.bold('kill -9 <PID>'), '\n');
console.log('or run packager on different port.');
} else {
console.log(chalk.bgRed.bold(' ERROR '), chalk.red(e.message));
var errorAttributes = JSON.stringify(e);
if (errorAttributes !== '{}') {
console.error(chalk.red(errorAttributes));
}
console.error(chalk.red(e.stack));
}
console.log('\nSee', chalk.underline('http://facebook.github.io/react-native/docs/troubleshooting.html'));
console.log('for common problems and solutions.');
process.exit(1);
});
var server = runServer(options, function() {
console.log('\nReact packager ready.\n');
});
webSocketProxy.attachToServer(server, '/debugger-proxy');
function loadRawBody(req, res, next) {
req.rawBody = '';
req.setEncoding('utf8');
req.on('data', function(chunk) {
req.rawBody += chunk;
});
req.on('end', function() {
next();
});
}
function openStackFrameInEditor(req, res, next) {
if (req.url === '/open-stack-frame') {
var frame = JSON.parse(req.rawBody);
launchEditor(frame.file, frame.lineNumber);
res.end('OK');
} else {
next();
}
}
function getDevToolsLauncher(options) {
return function(req, res, next) {
if (req.url === '/debugger-ui') {
var debuggerPath = path.join(__dirname, 'debugger.html');
res.writeHead(200, {'Content-Type': 'text/html'});
fs.createReadStream(debuggerPath).pipe(res);
} else if (req.url === '/launch-chrome-devtools') {
var debuggerURL = 'http://localhost:' + options.port + '/debugger-ui';
var script = 'launchChromeDevTools.applescript';
console.log('Launching Dev Tools...');
childProcess.execFile(path.join(__dirname, script), [debuggerURL], function(err, stdout, stderr) {
if (err) {
console.log('Failed to run ' + script, err);
}
console.log(stdout);
console.warn(stderr);
});
res.end('OK');
} else {
next();
}
};
}
// A status page so the React/project.pbxproj build script
// can verify that packager is running on 8081 and not
// another program / service.
function statusPageMiddleware(req, res, next) {
if (req.url === '/status') {
res.end('packager-status:running');
} else {
next();
}
}
function systraceProfileMiddleware(req, res, next) {
if (req.url !== '/systrace') {
next();
return;
}
console.log('Dumping profile information...');
const dumpName = '/tmp/dump_' + Date.now() + '.json';
const prefix = process.env.TRACE_VIEWER_PATH || '';
const cmd = path.join(prefix, 'trace2html') + ' ' + dumpName;
fs.writeFileSync(dumpName, req.rawBody);
childProcess.exec(cmd, function(error) {
if (error) {
if (error.code === 127) {
res.end(
'\n** Failed executing `' + cmd + '` **\n\n' +
'Google trace-viewer is required to visualize the data, You can install it with `brew install trace2html`\n\n' +
'NOTE: Your profile data was kept at:\n' + dumpName
);
} else {
console.error(error);
res.end('Unknown error %s', error.message);
}
return;
} else {
childProcess.exec('rm ' + dumpName);
childProcess.exec('open ' + dumpName.replace(/json$/, 'html'), function(err) {
if (err) {
console.error(err);
res.end(err.message);
} else {
res.end();
}
});
}
});
}
function cpuProfileMiddleware(req, res, next) {
if (req.url !== '/cpu-profile') {
next();
return;
}
console.log('Dumping CPU profile information...');
const dumpName = '/tmp/cpu-profile_' + Date.now();
fs.writeFileSync(dumpName + '.json', req.rawBody);
const cmd = path.join(__dirname, '..', 'JSCLegacyProfiler', 'json2trace') + ' -cpuprofiler ' + dumpName + '.cpuprofile ' + dumpName + '.json';
childProcess.exec(cmd, function(error) {
if (error) {
console.error(error);
res.end('Unknown error: %s', error.message);
} else {
res.end(
'Your profile was generated at\n\n' + dumpName + '.cpuprofile\n\n' +
'Open `Chrome Dev Tools > Profiles > Load` and select the profile to visualize it.'
);
}
});
}
function getAppMiddleware(options) {
var transformerPath = options.transformer;
if (!isAbsolutePath(transformerPath)) {
transformerPath = path.resolve(process.cwd(), transformerPath);
}
return ReactPackager.middleware({
nonPersistent: options.nonPersistent,
projectRoots: options.projectRoots,
blacklistRE: blacklist(),
cacheVersion: '2',
transformModulePath: transformerPath,
assetRoots: options.assetRoots,
assetExts: ['png', 'jpeg', 'jpg'],
resetCache: options.resetCache || options['reset-cache'],
polyfillModuleNames: [
require.resolve(
'../Libraries/JavaScriptAppEngine/polyfills/document.js'
),
],
});
}
function runServer(
options,
readyCallback
) {
var app = connect()
.use(loadRawBody)
.use(openStackFrameInEditor)
.use(getDevToolsLauncher(options))
.use(statusPageMiddleware)
.use(systraceProfileMiddleware)
.use(cpuProfileMiddleware)
// Temporarily disable flow check until it's more stable
//.use(getFlowTypeCheckMiddleware(options))
.use(getAppMiddleware(options));
options.projectRoots.forEach(function(root) {
app.use(connect.static(root));
});
app.use(connect.logger())
.use(connect.compress())
.use(connect.errorHandler());
return http.createServer(app).listen(options.port, '::', readyCallback);
}