remote debugging e.g. for demo_browser

[WolfgangFahl]

The justpy demo browser now supports remote debugging with pydevd.

start your pydevd locally in your IDE e.g. in liclipse as outlined in https://www.pydev.org/manual_adv_remote_debugger.html
You can e.g. create an SSH tunnel to your remote server

ssh -R 5678:localhost:5678 remote_server

and then run the demo browser with debugging switched on. See example call below:

export PYTHONPATH=.
python examples/demo_browser.py --debugServer localhost --debugPort 5678 --debugPathMapping /Users/john_doe/Documents/pyworkspace /home/john_doe/source/python --port 12001

Use the app vi e.g.
http://remote_server:12001/

and happyily debug from your your local server

[WolfgangFahl]

The demo browser has a -h option to show the possible arguments:

usage: demo_browser.py [-h] [-d] [--heroku] [-p PATH]
                       [--debugServer DEBUGSERVER] [--debugPort DEBUGPORT]
                       [--debugPathMapping DEBUGPATHMAPPING [DEBUGPATHMAPPING ...]]
                       [--host HOST] [--port PORT]

Justpy Examples browser

optional arguments:
  -h, --help            show this help message and exit
  -d, --debug           show debug info
  --heroku              in heroku environment pick up port from env variable
                        and set host to 0.0.0.0
  -p PATH, --path PATH  path to the examples (default:
                        /home/wf/source/python/justpy)
  --debugServer DEBUGSERVER
                        remote debug Server
  --debugPort DEBUGPORT
                        remote debug Port
  --debugPathMapping DEBUGPATHMAPPING [DEBUGPATHMAPPING ...]
                        remote debug Server path mapping - needs two arguments
                        1st: remotePath 2nd: local Path
  --host HOST
  --port PORT