1import { execSync } from 'child_process'
2import { betLog } from '../sharedF/betterConsLogF.mts'
3import { cliFlag } from './cliArgAI.mts'
4import { sleep } from '../sharedF/sleepF.mts'
5
6export const killExistingKey = 'killExisting' as const
7export const killExistingCliSchema = {[killExistingKey]: {flag: true, desc: 'kill existing process on port'}} as const
8
9export const maybeKillExisting = async (portNo: number) => {
10  if (cliFlag(killExistingKey)) await killPidOnPort(portNo)
11}
12
13export const killPidOnPort = async (portNo: number) => {
14  try {
15    const lsofOutput = execSync(`lsof -ti :${portNo}`, { encoding: 'utf8' }).trim()
16    if (!lsofOutput) return
17
18    const pidA = lsofOutput.split('\n').map(s => parseInt(s, 10)).filter(Boolean)
19    for (const pid of pidA) {
20      betLog('killPidOnPortAI killing', { pid, portNo })
21      process.kill(pid, 'SIGTERM')
22    }
23
24    // Give the process a moment to exit gracefully
25    await sleep(500)
26  } catch {
27    // lsof returns non-zero if no process found, which is fine
28  }
29}
30