Terminate whole build process tree on Cancel - google-app-engine

Question

Example, with these GAE build settings:
{
"cmd": ["c:/python27/python", "C:/Program Files/Google/google_appengine/dev_appserver.py", "./"],
"working_dir": "$file_path",
"selector": "source.python",
"name": "Google App Engine: App Server"
},
When I launch this build system, here are processes connected to ST:
When I terminate build (Tools > Cancel Build), ST terminates just top process, leaving ghost child process running:
I need to terminate those processes by hand, or they'll still run in background, and if left unnoticed any other launch of GAE build will result in error at some point.
I run build schemes with shell ("shell": true), but also without shell result is same - child processes are left running in background. So, does anyone knows how to configure ST build system that will clean it's state on Cancel?

Answer 1

I ran into this as well, so I decided that instead of using a build system, I would just open up a command prompt and let the GAE dev server run on it's own, outside of ST2. st2-gae-python.
The plugin is a work in progress, I just got it to where I could run the GAE dev server quickly, but it works for what it was intended for so far.
Right-click on your app's main folder.
Select `GAE.py - Create dev settings.` to generate `.gaedevserver-settings` file.
Edit `.gaedevserver-settings` file to your needs.
Right-click on your app's main folder.
Select `GAE.py - Start dev server.`
The GAE.py - Start dev server. selection opens a command prompt that runs up dev_appserver.py