detect-port
Version:
Node.js implementation of port detector
74 lines • 6 kB
JavaScript
import path from 'node:path';
import { readFileSync } from 'node:fs';
import { detectPort } from '../detect-port.js';
const pkgFile = path.join(__dirname, '../../../package.json');
const pkg = JSON.parse(readFileSync(pkgFile, 'utf-8'));
const args = process.argv.slice(2);
let arg_0 = args[0];
if (arg_0 && ['-v', '--version'].includes(arg_0.toLowerCase())) {
console.log(pkg.version);
process.exit(0);
}
const removeByValue = (arr, val) => {
for (let i = 0; i < arr.length; i++) {
if (arr[i] === val) {
arr.splice(i, 1);
break;
}
}
};
const port = parseInt(arg_0, 10);
const isVerbose = args.includes('--verbose');
removeByValue(args, '--verbose');
arg_0 = args[0];
if (!arg_0) {
const random = Math.floor(9000 + Math.random() * (65535 - 9000));
detectPort(random, (err, port) => {
if (isVerbose) {
if (err) {
console.log(`get available port failed with ${err}`);
}
console.log(`get available port ${port} randomly`);
}
else {
console.log(port || random);
}
});
}
else if (isNaN(port)) {
console.log();
console.log(` \u001b[37m${pkg.description}\u001b[0m`);
console.log();
console.log(' Usage:');
console.log();
console.log(` ${pkg.name} [port]`);
console.log();
console.log(' Options:');
console.log();
console.log(' -v, --version output version and exit');
console.log(' -h, --help output usage information');
console.log(' --verbose output verbose log');
console.log();
console.log(' Further help:');
console.log();
console.log(` ${pkg.homepage}`);
console.log();
}
else {
detectPort(port, (err, _port) => {
if (isVerbose) {
if (err) {
console.log(`get available port failed with ${err}`);
}
if (port !== _port) {
console.log(`port ${port} was occupied`);
}
console.log(`get available port ${_port}`);
}
else {
console.log(_port || port);
}
});
}
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