@stryker-mutator/core/dist/src/unexpected-exit-handler.js

The extendable JavaScript mutation testing framework

import { coreTokens } from './di/index.js';
const signals = Object.freeze(['SIGABRT', 'SIGINT', 'SIGHUP', 'SIGTERM']);
export class UnexpectedExitHandler {
    process;
    unexpectedExitHandlers = [];
    shuttingDown = false;
    static inject = [coreTokens.process];
    constructor(process) {
        this.process = process;
        signals.forEach((signal) => process.on(signal, this.processSignal));
    }
    processSignal = (_signal, signalNumber) => {
        // See https://nodejs.org/api/process.html#signal-events, we should exit with 128 + signal number
        const exitCode = 128 + signalNumber;
        if (this.shuttingDown) {
            // Second signal: force immediate exit without waiting for exit handlers.
            console.error('Forced exit. Received signal again while shutting down.');
            this.process.exit(exitCode);
            return; // `process.exit` is stubbed in tests, so return explicitly to prevent fall-through
        }
        this.shuttingDown = true;
        if (this.unexpectedExitHandlers.length === 0) {
            this.process.exit(exitCode);
            return; // `process.exit` is stubbed in tests, so return explicitly to prevent fall-through
        }
        // Run async handlers before exiting. Signal handlers keep the event loop alive,
        // so we can await async work here.
        void Promise.allSettled(this.unexpectedExitHandlers.map((handler) => handler())).then(() => {
            this.process.exit(exitCode);
        });
    };
    registerHandler(handler) {
        this.unexpectedExitHandlers.push(handler);
    }
    dispose() {
        signals.forEach((signal) => this.process.off(signal, this.processSignal));
    }
}
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