/** * 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. */ 'use strict'; var chalk = require('chalk'); var execSync = require('child_process').execSync; var execFileSync = require('child_process').execFileSync; var path = require('path'); var execOptions = { encoding: 'utf8', stdio: [ 'pipe', // stdin (default) 'pipe', // stdout (default) 'ignore', //stderr ], }; function isProcessAReactApp(processCommand) { return /^node .*react-scripts\/scripts\/start\.js\s?$/.test(processCommand); } function getProcessIdOnPort(port) { return execFileSync('lsof', ['-i:' + port, '-P', '-t', '-sTCP:LISTEN'], execOptions) .split('\n')[0] .trim(); } function getPackageNameInDirectory(directory) { var packagePath = path.join(directory.trim(), 'package.json'); try { return require(packagePath).name; } catch (e) { return null; } } function getProcessCommand(processId, processDirectory) { var command = execSync( 'ps -o command -p ' + processId + ' | sed -n 2p', execOptions ); command = command.replace(/\n$/, ''); if (isProcessAReactApp(command)) { const packageName = getPackageNameInDirectory(processDirectory); return packageName ? packageName : command; } else { return command; } } function getDirectoryOfProcessById(processId) { return execSync( 'lsof -p ' + processId + ' | awk \'$4=="cwd" {for (i=9; i<=NF; i++) printf "%s ", $i}\'', execOptions ).trim(); } function getProcessForPort(port) { try { var processId = getProcessIdOnPort(port); var directory = getDirectoryOfProcessById(processId); var command = getProcessCommand(processId, directory); return ( chalk.cyan(command) + chalk.grey(' (pid ' + processId + ')\n') + chalk.blue(' in ') + chalk.cyan(directory) ); } catch (e) { return null; } } module.exports = getProcessForPort;