how to feed stdin to external process and redirect stdout ?

[tissatussa]

i'm new to Owlkettle but i managed to compile most of your examples into a GUI.
i also have some experience programming Nim, but can't succeed redirecting / catching stdout.
i'm trying to interact with a chess engine binary, but the question is general : how to fill a text widget with such data ?

i found forum entries like :

Redirect stdout for certain execution
https://forum.nim-lang.org/t/6909

..but i can't make those code parts work - can anyone give some basic code, or point me to a working example ?

[tissatussa]

Btw. maybe this better be a Nim question in general ? yet i have no clue about stdin/stdout regarding your widgets.

[can-lehmann]

It might be worth also asking this on the Nim Forum or the Nim Discord, as it is somewhat at the intersection of a owlkettle / Nim question. The owlkettle specific aspect of this question is probably how to asynchronously read from stdout (while the gui remains interactive). You can achieve with this using threading.

[tissatussa]

You can achieve with this using threading..

i looked into threading.nim but i see no executable being fired ? What does the thread do here ? Is it empty ?

[tissatussa]

asynchronously read from stdout..

i'm aware these techniques exist but i'm a simple programmer, i need examples .. then i can change things and learn. Such (a)sync scripts are hard to understand, to me at least ..

[tissatussa]

i created a working example now : StefanSalewski/salewski-chess#3 (comment)