fix(smartexit): use native OS methods to kill process trees; remove tree-kill dependency

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartexit',
-  version: '1.1.1',
+  version: '2.0.3',
   description: 'A library for managing graceful shutdowns of Node.js processes by handling cleanup operations, including terminating child processes.'
 }

ts/smartexit.classes.smartexit.ts

@@ -56,21 +56,31 @@ export type TProcessSignal =
 export class SmartExit {
   /** Kill an entire process tree by PID. */
   public static async killTreeByPid(pidArg: number, signalArg: TProcessSignal = 'SIGKILL') {
-    const done = plugins.smartpromise.defer();
-    plugins.treeKill.default(pidArg, signalArg, (err) => {
-      if (err) {
-        done.reject(err);
-      } else {
-        done.resolve();
+    if (process.platform === 'win32') {
+      // Windows: use native taskkill for tree kill
+      try {
+        plugins.childProcess.execSync(`taskkill /T /F /PID ${pidArg}`, { stdio: 'ignore' });
+      } catch {
+        // Process already dead
       }
-    });
-    await done.promise;
+    } else {
+      // POSIX: kill the entire process group via negative PID.
+      // Works even for grandchildren reparented to PID 1.
+      try {
+        process.kill(-pidArg, signalArg);
+      } catch (err: any) {
+        if (err.code !== 'ESRCH') {
+          // ESRCH = no such process/group, already dead — that's fine
+          throw err;
+        }
+      }
+    }
   }
 
   // Instance state
   public processesToEnd = new plugins.lik.ObjectMap<plugins.childProcess.ChildProcess>();
   public cleanupFunctions = new plugins.lik.ObjectMap<() => Promise<any>>();
-  /** PIDs tracked independently — survives removeProcess() so shutdown can still kill the tree. */
+  /** PIDs tracked independently for tree-killing during shutdown. */
   public trackedPids = new Set<number>();
   private options: ISmartExitOptions;
 
@@ -108,6 +118,9 @@ export class SmartExit {
   /** Unregister a child process. */
   public removeProcess(childProcessArg: plugins.childProcess.ChildProcess) {
     this.processesToEnd.remove(childProcessArg);
+    if (childProcessArg.pid) {
+      this.trackedPids.delete(childProcessArg.pid);
+    }
   }
 
   /**

ts/smartexit.plugins.ts

@@ -9,9 +9,3 @@ import * as smartpromise from '@push.rocks/smartpromise';
 
 export { lik, smartpromise };
 
-// third party scope
-import * as treeKill from 'tree-kill';
-
-export {
-  treeKill
-}