feat: add reverse remote pudb

[jen6]

Hi PUDB community!

" python debugger
autocmd FileType python nmap <space>db O from pudb.remote import set_trace; set_trace(term_size=(202, 40), host='localhost', port=9999)<esc>
autocmd FileType python nmap <space>dt :TestNearest <cr> <bar>:!sleep 3<cr> <bar> :Start telnet localhost 9999<CR>

This is my vim setting for using the pudb in vim to debug python code. It works well usually. But sometimes telnet cannot connect to pudb because rarely tests need more than three seconds to initialize. I want to solve this but as I know there is no way to receive debugging started for now.

My idea to solve this problem is using reverse telnet.

$ stty -echo -icanon && nc -lcv 9999

Using NC open the port to accept the reverse shell connection, in pudb connect to the reverse shell. It makes no need to wait for the test program ready.

Welcome for opinions. thanks

[inducer]

Thanks for your contribution! I like the idea. A few comments:

• It looks like your code has a large amount of duplication with the existing remote debugging code that I would like to avoid. Could you refactor your code to share code between the two approaches wherever possible?
• Especially given the stty command needed, this won't be discoverable without some how-to instructions in the documentation. Could you add those?

[jen6]

Hi @inducer. It nice you like my idea!

I added reverse parameter in the remote debugger and remove duplicate code in reverse_remote.py . Also added description in starting.rst

[jen6]

@inducer I applied your suggestion. Please check it.

[inducer]

Thanks for your contribution!