Add an option for AttachMe to be quiet on stdout/stderr

[smola]

I'm debugging JVM processes that get called by other programs and whose stdout/stderr get examined. AttachMe messages to stdout/stderr break the calling process by introducing unexpected output.

It would be nice to add an additional agent option (maybe quiet=[y/n]) to avoid printing anything, at least for anything that is not a fatal error. That would make it possible to debug JVM cli apps that get called from scripts, etc.

[samvel1024]

@smola I think attachme agent should be writing only to stderr. Is it still an issue for you?

Let me know in case stdout gets polluted with attachme messages as well.

[smola]

Unfortunately, stderr pollution is also a problem in my use case, since the caller is a 3rd party which captures both stdout and stderr.

[big-andy-coates]

@smola what's the 'unexpected output' you're seeing? Is it "Listening for transport dt_socket at address: "? If it isn, then this is related to #11, which has a workaround noted and a PR coming.

[smola]

@big-andy-coates Yes, that was the problem. I was using this in a subprocess, and the parent process did not expect the child to have any extra output.

[big-andy-coates]

Great.

Maybe close this issue as a duplicate then?