Use Base logging for progress meters

[ChrisRackauckas]

Base now has a way to log progress information. Juno is using:

@logmsg -1 "making progress" progress=0.5 # or progress=NaN, or progress="done"

This means that the standard logging setup can generate the logging information. It would be good if on v0.7 ProgressMeter.jl becomes simply a way of displaying this logging information. This way every package can natively support progress meters and how it is displayed just becomes a user-preference or IDE side issue.

This should be done in coordination with @pfitzseb and his work on Juno.

[adamslc]

I have a prototype of this working at ProgressLogging. I started out intending to update ProgressMeter, but now it seems to me that the two packages actually provide very different functionality, and neither one can completely replace the other.

[ChrisRackauckas]

It's compatible with the same command of Juno (shown above)?

[adamslc]

Yes, it works with that invocation.

[c42f]

I started writing a comment here about how I think progress logging should work with the new infrastructure, and totally nerd sniped myself. Which led to the following implementation in MicroLogging.ConsoleLogger:

c42f/MicroLogging.jl#18

In particular I'm quite excited about MicroLogging.StickyMessages, which is a general solution to having a selection of messages be "sticky" at the bottom of the screen, while the rest of the console text scrolls freely, including both logging and other stream output. I think this should eventually be folded into the Base REPL code (though there is some yak shaving in libuv to do before it will work smoothly on windows).

[AshtonSBradley]

ProgressMeter is so great, thanks for this package that really helps the user experience in Juno.

Is there any scope for Jupyter notebook support?

[c42f]

There's such a thing in python so it's technically possible to do in the jupyter UI already. I don't know much about the technical details though. See https://github.com/tqdm/tqdm#ipython-jupyter-integration

[tkf]

There is now https://github.com/JunoLab/ProgressLogging.jl which should be usable as a drop-in replacement of Juno.

I also created https://github.com/tkf/ConsoleProgressMonitor.jl as a console-based backend for handling the log messages using ProgressMeter.jl.

ref: JuliaLogging/ProgressLogging.jl#1