@specs-feup/lara/code/ChildProcessHandling.js

A js port of the popular framework for building source-to-source compilers

import Debug from "debug";
const debug = Debug("ChildProcessHandling");
const activeChildProcesses = {};
export function getActiveChildProcesses() {
    return activeChildProcesses;
}
export function addActiveChildProcess(child) {
    if (child.pid === undefined) {
        throw new Error("Child process doesn't have a pid");
    }
    const pid = child.pid;
    activeChildProcesses[pid] = child;
    // Listen for the 'exit' event of the child process
    child.once("exit", () => {
        delete activeChildProcesses[pid];
    });
}
export function handleExit(exitProcess = true) {
    const closingChildren = [];
    for (const child of Object.values(activeChildProcesses)) {
        const promise = new Promise((resolve) => {
            child.once("exit", (code) => {
                resolve(code);
            });
        });
        closingChildren.push(promise);
        child.kill();
    }
    Promise.all(closingChildren)
        .then(() => {
        debug("Closed all child processes");
        if (exitProcess) {
            process.exit();
        }
    })
        .catch((err) => {
        debug(`Error closing child processes: ${err.toString()}`);
    });
}
export function listenForTerminationSignals() {
    process.on("SIGINT", handleExit);
    process.on("SIGTERM", handleExit);
    process.on("SIGQUIT", handleExit);
    process.on("uncaughtException", handleExit);
    process.on("unhandledRejection", handleExit);
}
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