buildbot: implement filters of stdio, one for installation, one for dependencies

[mojca (Mojca Miklavec)]

I strongly suspect that build slaves only send output once they have "enough to send" or once the job is finished.

The short list of dependencies is never functional until all dependencies have been built. I suspect this is because the output is not updated on regular bases. It would be more helpful if that list was updated "live" and for that we would need a filter implemented in master.cfg.

It would be also very helpful to get some "live feedback" with an equivalent of what gets printed when using port install foo (progress that reports just a single line for fetching, configuring, building, ...)

[larryv (Lawrence Velázquez)]

So what exactly is the problem with the current situation?

[mojca (Mojca Miklavec)]

No serious problem.

But 10.5 might need 30 minutes to install dependencies. During all that time the file dependencies is empty. It would be more helpful if the file would be accessible on the fly rather than just at the end.

Similar case for install log for ports. It would be nice to be able to see the short progress report (fetch, configure, build, ... without all the "useless" verbose/debug info).