Progress monitoring fallback to the console

[ChrisRackauckas]

It would be nice to be able to support progress monitoring in the console when Juno is not available. I think the proper way to handle this will be to actually implement this as a standard feature for Juno.jl's progress API, so then any implementation of progress monitoring in Juno will automatically carry over to such an implementation in the console.

Also noted at SciML/DifferentialEquations.jl#121

It would not be too hard if Juno.jl accepts the dependency of ProgressMeter.jl, in which case a Progress type could get a new field of whether to print to the console or use the Juno progress bar (default determined by whether Juno is loaded, but make this a keyword arg on construction so one can switch this around as needed), and a few methods could have a separate branch depending on this boolean which calls the appropriate ProgressMeter.jl commands. It can display variables, so the msg string can probably be displayed as well, so it should be a feature-complete fallback.

[MikeInnes]

I'm not against this, but my main concern would be ProgressMeter.jl's ability to handle the nested case. For the flag we can just use Juno.isactive().

[ChrisRackauckas]

I don't think it can handle the nested case, and you may just not want to throw an error if someone tries it with !Juno.isactive(). I think for most uses there is only one progress bar, so I think that it would still cover a majority of uses.

[Yacalis]

Hi everyone, I'm interested in doing this project as part of the Google Summer of Code, as listed on the tooling projects page, http://julialang.org/soc/projects/tooling.html#progress-metre-improvements. What can I do to get started on this?

[ChrisRackauckas]

@MikeInnes

[Datseris]

Hey People, I am also looking for some kind of fallback for progress meters in the case of REPL :)

[pfitzseb]

Ref JuliaLang/Juleps#30 for some very nice thoughts on a more general design for this. In the short run a fallback to ProgressMeters.jl is certainly possible and I might even get to that sometime ;)

[Datseris]

Hello, I would like to solve this / implement this. Any tips? I have to be able to do everything through the Requires package, because my packages do not have a dependency on Juno.

My first question,s how do I check whether users are running code in Juno or in Repl? I do not know that. I saw the command Juno.isactive() but what if Juno doesn't exist at all, e.g. they are in the repl?

[pfitzseb]

You can use isdefined(Main, :Juno) && Juno.isactive(), but if I were you I wouldn't spend to much time coming up with a super clean solution to this problem -- once JuliaLang/julia#23712 is merged it'll enable a much better interface.

[Datseris]

Cool thanks for letting me know. But how can logging have any connection with progress bars in Juno :S ?

[ChrisRackauckas]

The logging tools are going to have a connection to a standard progress monitoring API which Juno can plug into.

[Datseris]

Great!