`OutputStream.available` always retrun 0 #28

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OutputStream.available always retrun 0#28

I wanna peek the how many bytes in OutputStream that I can read, in case of blocked by process.
However I found when I use sub.stdout.available, it always returns 0, seems available didn't implemented by os.OutputStream nor java.lang.ProcessPipeInputStream.
Thus there might be no way to implement a non-block reading by os-lib

@sequencer you can always use _.wrapped.available but yea... it is long standing bug.
Still... _.available does not guarantee anything. Spec says it is only estimation.

mentioned this

on Aug 11, 2024

Use unwrapped underlying subprocess input streams when pumping com-lihaoyi/mill#3360

added a commit that references this issue

on Aug 11, 2024

Use unwrapped underlying subprocess input streams when pumping (#3360)

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