core: enhanced pm2 detection

packages/hydrooj/package.json

@@ -67,10 +67,6 @@
         "@types/semver": "^7.3.12",
         "@types/serialize-javascript": "^5.0.2",
         "@types/superagent": "^4.1.15",
-        "moment": "^2.29.4",
+        "moment": "^2.29.4"
-        "pm2": "^5.2.0"
-    },
-    "peerDependencies": {
-        "pm2": "*"
     }
 }

packages/hydrooj/src/model/task.ts

@@ -1,6 +1,7 @@
 import { hostname } from 'os';
 import moment from 'moment-timezone';
 import { FilterQuery, ObjectID } from 'mongodb';
+import { nanoid } from 'nanoid';
 import { sleep } from '@hydrooj/utils/lib/utils';
 import { BaseService, EventDoc, Task } from '../interface';
 import { Logger } from '../logger';
@@ -139,7 +140,7 @@ class TaskModel {
     static Worker = Worker;
 }
 
-const id = hostname();
+const id = process.env.exec_mode === 'cluster_mode' ? hostname() : nanoid();
 Worker.addHandler('task.daily', async () => {
     await global.Hydro.model.record.coll.deleteMany({ contest: new ObjectID('000000000000000000000000') });
     await global.Hydro.script.rp?.run({}, new Logger('task/rp').debug);

packages/hydrooj/src/service/bus.ts

@@ -3,6 +3,7 @@ import cac from 'cac';
 import type {
     Db, FilterQuery, ObjectID, OnlyFieldsOfType,
 } from 'mongodb';
+import pm2 from '@hydrooj/utils/lib/locate-pm2';
 import type { ProblemSolutionHandler } from '../handler/problem';
 import type { UserRegisterHandler } from '../handler/user';
 import type {
@@ -191,8 +192,7 @@ export function broadcast<K extends keyof EventMap>(event: K, ...payload: Parame
 }
 
 try {
-    if (!process.send) throw new Error();
+    if (!process.send || !pm2 || process.env.exec_mode !== 'cluster_mode') throw new Error();
-    const pm2: typeof import('pm2') = require('pm2');
     pm2.launchBus((err, bus) => {
         if (err) throw new Error();
         bus.on('hydro:broadcast', (packet) => {

packages/utils/lib/locate-pm2.ts

@@ -0,0 +1,18 @@
+import path from 'path';
+import fs from 'fs-extra';
+
+const PATH = process.env.PATH?.split(':') || [];
+
+// @ts-ignore
+const pm2: typeof import('pm2') | null = (() => {
+    for (const dir of PATH) {
+        try {
+            const info = fs.readlinkSync(path.resolve(dir, 'pm2'));
+            const p = path.resolve(dir, info);
+            return require(`${p.split('.bin')[0]}pm2`); // eslint-disable-line import/no-dynamic-require
+        } catch (e) { }
+    }
+    return null;
+})();
+
+export default pm2;

packages/utils/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/utils",
-    "version": "1.3.6",
+    "version": "1.3.7",
     "description": "hydrooj utils",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",