Log output from subprocess to defined area of console?

[zachwhaley]

Can Rich log or "stream" output from a subprocess to some defined area of the console?

The effect I'm looking for is basically exactly like what the docker cli does below.
Output from the commands run inside the docker image are logged in a subsection of the console, and that output is scrolled out of the way as it progresses, keeping the total output on the console concise.

[zachwhaley]

I managed to figure something out that is good enough for me. It's not multiple lines of output, just a single line.

Code:

            # progress bar for terminal output (will be hidden when step is done)
            # disabling markup because it causes live to hang
            prog = Progress(TextColumn("{task.description}", markup=False))
            task_id = prog.add_task(" ".join(cmd))

            # Use Live to update progress with output
            with Live(prog, console=console, transient=True) as live:
                with open(file, 'wb') as o: # the file here is to log the full output
                    with subprocess.Popen(cmd, stdout=subprocess.PIPE) as proc:
                        for line in proc.stdout:
                            o.write(line)
                            prog.update(task_id, description=line.decode())
                            live.refresh()