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import { randomUUID } from "$lib/utils/randomUuid";
import { timeout } from "$lib/utils/timeout";
import { logger } from "./logger";
type ExitHandler = () => void | Promise<void>;
type ExitHandlerUnsubscribe = () => void;
const listeners = new Map<string, ExitHandler>();
export function onExit(cb: ExitHandler): ExitHandlerUnsubscribe {
const uuid = randomUUID();
listeners.set(uuid, cb);
return () => {
listeners.delete(uuid);
};
}
async function runExitHandler(handler: ExitHandler): Promise<void> {
return timeout(Promise.resolve().then(handler), 30_000).catch((err) => {
logger.error(err, "Exit handler failed to run");
});
}
export function initExitHandler() {
let signalCount = 0;
const exitHandler = async () => {
signalCount++;
if (signalCount === 1) {
logger.info("Received signal... Exiting");
await Promise.all(Array.from(listeners.values()).map(runExitHandler));
logger.info("All exit handlers ran... Waiting for svelte server to exit");
}
if (signalCount === 3) {
logger.warn("Received 3 signals... Exiting immediately");
process.exit(1);
}
};
process.on("SIGINT", exitHandler);
process.on("SIGTERM", exitHandler);
}
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