feat(core): Introduce ProcessMonitor with memory management and spawning features

ts/classes.processmonitor.ts

@@ -1,8 +1,6 @@
-import { spawn, ChildProcess } from 'child_process';
-import psTree from 'ps-tree';
-import pidusage from 'pidusage';
+import * as plugins from './plugins.js';
 
-interface IMonitorConfig {
+export interface IMonitorConfig {
   name?: string;                 // Optional name to identify the instance
   projectDir: string;            // Directory where the command will run
   command: string;               // Full command to run (e.g., "npm run xyz")
@@ -11,8 +9,8 @@ interface IMonitorConfig {
   monitorIntervalMs?: number;    // Interval (in ms) at which memory is checked (default: 5000)
 }
 
-class ProcessMonitor {
-  private child: ChildProcess | null = null;
+export class ProcessMonitor {
+  private child: plugins.childProcess.ChildProcess | null = null;
   private config: IMonitorConfig;
   private intervalId: NodeJS.Timeout | null = null;
   private stopped: boolean = true; // Initially stopped until start() is called
@@ -46,7 +44,7 @@ class ProcessMonitor {
           ', '
         )}] in directory: ${this.config.projectDir}`
       );
-      this.child = spawn(this.config.command, this.config.args, {
+      this.child = plugins.childProcess.spawn(this.config.command, this.config.args, {
         cwd: this.config.projectDir,
         detached: true,
         stdio: 'inherit',
@@ -56,7 +54,7 @@ class ProcessMonitor {
         `Spawning command "${this.config.command}" in directory: ${this.config.projectDir}`
       );
       // Use shell mode to allow a full command string.
-      this.child = spawn(this.config.command, {
+      this.child = plugins.childProcess.spawn(this.config.command, {
         cwd: this.config.projectDir,
         detached: true,
         stdio: 'inherit',
@@ -107,11 +105,11 @@ class ProcessMonitor {
    */
   private getProcessGroupMemory(pid: number): Promise<number> {
     return new Promise((resolve, reject) => {
-      psTree(pid, (err, children) => {
+      plugins.psTree(pid, (err, children) => {
         if (err) return reject(err);
         // Include the main process and its children.
         const pids: number[] = [pid, ...children.map(child => Number(child.PID))];
-        pidusage(pids, (err, stats) => {
+        plugins.pidusage(pids, (err, stats) => {
           if (err) return reject(err);
           let totalMemory = 0;
           for (const key in stats) {
@@ -157,22 +155,3 @@ class ProcessMonitor {
     console.log(prefix + message);
   }
 }
-
-// Example usage:
-const config: IMonitorConfig = {
-  name: 'Project XYZ Monitor',        // Identifier for the instance
-  projectDir: '/path/to/your/project',  // Set the project directory here
-  command: 'npm run xyz',               // Full command string (no need for args)
-  memoryLimitBytes: 500 * 1024 * 1024,    // 500 MB memory limit
-  monitorIntervalMs: 5000,              // Check memory usage every 5 seconds
-};
-
-const monitor = new ProcessMonitor(config);
-monitor.start();
-
-// Ensure that on process exit (e.g. Ctrl+C) we clean up the child process and prevent respawns.
-process.on('SIGINT', () => {
-  monitor.log('Received SIGINT, stopping monitor...');
-  monitor.stop();
-  process.exit();
-});