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import { execSync } from 'node:child_process'
import { promisify } from 'util'
/**
* Returns array of PIDs that were started by the given parent PID.
*/
export const getChildProcesses = (parentPid: number): number[] => {
try {
// Get all running processes
const allProcesses = execSync('ps -e -o pid= -o ppid=')
.toString()
.trim()
.split('\n')
// Filter out processes whose PPID matches the given PID
const childPids = allProcesses
.map((line) => line.trim().split(/\s+/))
.filter(([, ppid]) => Number(ppid) === parentPid)
.map(([pid]) => Number(pid))
return childPids
} catch (e) {
console.error('Failed to get child processes', e)
return []
}
}
/**
* Returns the command line binary and args.
*/
export const getProcessBinary = (pid: number): string => {
try {
const binary = execSync(`ps -p ${pid} -o command=`).toString().trim()
return binary
} catch (e) {
console.error('Failed to get process binary', e)
return 'unknown'
}
}
const sleep = promisify(setTimeout)
/**
* Tries to kill the given PID with the given signal.
* Returns true if the signal was sent successfully.
*/
const tryKill = (pid: number, signal: NodeJS.Signals): boolean => {
try {
process.kill(pid, signal)
return true
} catch {
return false
}
}
export default async function globalTeardown(): Promise<void> {
const shellPIDs = getChildProcesses(process.pid).filter((pid) =>
getProcessBinary(pid).includes('./bin/goalert.cover'),
)
const goalertPIDs = shellPIDs.flatMap((pid) => getChildProcesses(pid))
console.log('Found GoAlert PIDs:', goalertPIDs.map(getProcessBinary))
// for loop over goalertPIDs, and send SIGTERM to each process.
// eslint-disable-next-line no-labels
nextPID: for (const pid of goalertPIDs) {
console.log(`Killing process ${pid}...`)
let limit = 5
while (tryKill(pid, 'SIGINT')) {
if (limit-- <= 0) {
console.log(`Process ${pid} did not exit after 5 seconds, skipping...`)
// eslint-disable-next-line no-labels
continue nextPID
}
console.log(`Waiting for process ${pid} to exit...`)
await sleep(100)
}
console.log(`Process ${pid} exited.`)
}
}
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