Logging to the progress bar

[bquorning]

Directly outputting to stdout or stderr (puts or warn) doesn’t play well with ruby-progressbar. Instead, it’s recommended to call #log on the ProgressBar instance.

Would is be possible to get access to the instance of ProgressBar instantiated with Parallel?

[grosser]

simple solution: pass in your own progressbar object
more elegant: Parallel.build_progressbar(options) and then pass it in
somehow storing it on Parallel would be weird since you can have multiple running at any time ...

[bbugh]

I run into this all the time still, mostly with large data migration tasks. Has there been a status change for this? If not, would it make sense for :progress option to receive a ProgressBar instance or a hash?

progress = ProgressBar.create(format: "%t (%c/%C): |%w|")
Progress.each(data, progress: progress) do |x|
  progress.log("whatever")
end

[grosser]

sounds good, make a PR please :)

[bbugh]

I made a patch, but it doesn't seem promising, it still results in some uneven prints. 💩 Since the progress bar is unsynced from the parallel behavior, it's not surprising

I was hoping to tie into the mutex on parallel with a custom progressbar output class, but progressbar initializes the custom outputter and you can't override it after creation.

I'm not sure this would end up with any better results than just using puts, without a tighter integration with ruby-progressbar, and/or some way to initialize an output class within the context of parallel.

progress.log output!
progress.log output!
progress.log output!
progress.log output!th Pie 20
progress.log output!
progress.log output!
progress.log output!th Pie 20
progress.log output!
progress.log output!
progress.log output!
progress.log output!
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progress.log output!
progress.log output!
Filling Halflings With Pie 20 ▒▒▒▒▒▒

Here's the code anyway: bbugh@f31d219

[grosser]

thx for looking into it and providing some code for others to hack on :)

[ZimbiX]

This is super hacky, but you can access the progress bar instance with:

ObjectSpace.each_object(ProgressBar::Base).first

Calling #log on this results in clean logging.