import { execa } from 'execa';
import { logger } from '@virtualbox-mcp/shared-utils';
export async function ensurePortFree(port: number) {
const platform = process.platform;
try {
if (platform === 'win32') {
const { stdout } = await execa('netstat', ['-ano']);
const lines = stdout.split('\n');
const portLine = lines.find(line => line.includes(`:${port}`));
if (portLine) {
const parts = portLine.trim().split(/\s+/);
const pid = parts[parts.length - 1]; // PID is the last column
if (pid) {
logger.warn(`Port ${port} is in use by PID ${pid}. Killing it...`);
await execa('taskkill', ['/F', '/PID', pid]);
}
}
} else {
// Linux/macOS
try {
const { stdout } = await execa('lsof', ['-i', `:${port}`, '-t']);
if (stdout) {
const pids = stdout.split('\n').filter(Boolean);
for (const pid of pids) {
logger.warn(`Port ${port} is in use by PID ${pid}. Killing it...`);
await execa('kill', ['-9', pid]);
}
}
} catch (e: any) {
// lsof returns exit code 1 if no process found, which is fine
if (e.exitCode !== 1) throw e;
}
}
} catch (error) {
logger.error(`Failed to ensure port ${port} is free`, error);
// Don't crash, just log. Setup might fail later if port is actually blocked.
}
}
