app.ts

// Copyright (c) 2025, Compiler Explorer Authors
// All rights reserved.
//
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//     * Redistributions in binary form must reproduce the above copyright
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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////
// see https://docs.sentry.io/platforms/javascript/guides/node/install/late-initialization/
import '@sentry/node/preload'; // preload Sentry's "preload" support before any other imports
////
import process from 'node:process';

import {parseArgsToAppArguments} from './lib/app/cli.js';
import {loadConfiguration} from './lib/app/config.js';
import {initialiseApplication} from './lib/app/main.js';
import {setBaseDirectory} from './lib/assert.js';
import {initialiseLogging, logger} from './lib/logger.js';
import * as props from './lib/properties.js';
import * as utils from './lib/utils.js';

// Set base directory for resolving paths
setBaseDirectory(new URL('.', import.meta.url));

// Set up signal handlers
process.on('uncaughtException', uncaughtHandler);
process.on('SIGINT', signalHandler('SIGINT'));
process.on('SIGTERM', signalHandler('SIGTERM'));
process.on('SIGQUIT', signalHandler('SIGQUIT'));

function signalHandler(name: string) {
    return () => {
        logger.info(`stopping process: ${name}`);
        process.exit(0);
    };
}

function uncaughtHandler(err: Error, origin: NodeJS.UncaughtExceptionOrigin) {
    logger.info(`stopping process: Uncaught exception: ${err}\nException origin: ${origin}`);
    // The app will exit naturally from here, but if we call `process.exit()` we may lose log lines.
    // see https://github.com/winstonjs/winston/issues/1504#issuecomment-1033087411
    process.exitCode = 1;
}

// Parse command line arguments
const appArgs = parseArgsToAppArguments(process.argv);
if (appArgs.isWsl) process.env.wsl = 'true';

// Initialize logging reasonably early in startup
initialiseLogging(appArgs.loggingOptions);

// Load configuration
const distPath = utils.resolvePathFromAppRoot('.');
const config = loadConfiguration(appArgs);
const awsProps = props.propsFor('aws');

// Initialize and start the application
initialiseApplication({
    appArgs,
    config,
    distPath,
    awsProps,
}).catch(err => {
    logger.error('Top-level error (shutting down):', err);
    // Shut down after a second to hopefully let logs flush.
    setTimeout(() => process.exit(1), 1000);
});