I must use the method exec on Nodejs because I need to do some stdout redirections and run more than one command at the same time. So I run the child process like this:

let shell = null;
const child_process = require('child_process')
var command = 'activate python_environment & bokeh serve project_folder/ log/logger.log 2>&1';
shell = child_process.exec(command); 

I need ps-tree to kill the children as I do in the belower code. It works well on Ubuntu. But the problem is that I get an orphan (zombie) process on Windows if I do not kill the children processes.

const psTree = require('ps-tree')
app.on('window-all-closed', function () {
    electron.app.quit()
    if(shell != null){
        psTree(shell.pid, function (err, children) {
            children.map(function (p) {
                process.kill(p.PID);                    
            });
        });
    }
});

The ps-tree module uses the command ps on linux and the command wmic on Windows. So it is crossplatform. But it does not work in my case. Is there a better way to do this?

I was exploring in the ps-tree source code but I found nothing.

I use process.kill because I am using electron as well.

I am afraid I should try to do it manually getting all the processes list with wmic. That is what ps-tree is trying to do.

Note: The module tree-kill did not work on both platforms neither.

Update

Well, I found an ugly workaround. I save my python process PID into an external file through python code os.getpid(). With this I can access to the problematic PID within node like this:

const fs = require('fs'); 
fs.readFile(filePath, 'utf-8', function (err, data) {
    process.kill(parseInt(data, 10));
    app.quit();                
});