Our pants repo has a number of processes which build PEX files and then invoke those PEX files using

VenvPexProcess

and

ProcessResult

. Currently, we just do this after we get the `ProcessResult`:

print(result.stdout.decode())
print(result.stderr.decode())

This is great and all, but is there a way to output log lines as they're being produced? This would be super useful for long-running processes

https://github.com/pantsbuild/pants/issues/11056 is a relevant issue; it looks like @gorgeous-winter-99296 might be an interesting person to talk to

I have a prototype for that, mostly haven't had time to land it! And it was super-hacky. Pex is extra funky since it doesn't output much in terms of logs by default anyways.

Neat. So if I'm understanding things properly, we don't have a way of streaming output log lines from running processes in pants today, but might have this capability in a future release?

Correct! There's two different things being discussed in terms of log-streaming. I'm primarily interested in "short-form" streaming-to-console, but that issue specifically I think is more long-form/complete logs to a browser or other viewer. My prototype started looking at long-form but pivoted towards short-form because it requires less "moving parts", i.e., we already have TUI that can do short-form streaming. The other one requires a server of some sort that gathers logs, which can amount to significant amounts of storage and more complex runtime.