This is PowerBar - The last progressbar-library you'll ever need.
Detects when stdout is not a terminal and automatically falls back to logging
Does not clutter your log-files with ansi-codes!
If your CLI-app can run interactively and non-interactively (e.g. cronjob) you will automatically get reasonable progress-output in both modes.
By default prints to stderr but can call any output-method of your choice (e.g. your favorite Logger).
Fully customizable; all output is template-driven.
All output is optional. You may use PowerBar to silently collect progress information (percentage-done, throughput, ETA, etc.) and then use the computed values elsewhere in your app.
All state can be updated at any time. For example: If you're monitoring a multi-part operation then you can change the status-message of a running PowerBar to reflect the current state.
gem install powerbar
Watch the demo that was installed along with the gem:
Then look at the source-code of the demo. Pretty much all use-cases are covered in there, including templates and how to hook in your own logger.
Example (for the impatient)
#!/usr/bin/env ruby require 'powerbar' total = 100000 step = 1000 p = PowerBar.new # Override some default values to demonstrate how the settings work p.settings.tty.finite.template.barchar = '*' p.settings.tty.finite.template.padchar = '.' # Dummy loop to simulate some progress (0..total).step(step).each do |i| p.show(:msg => 'DEMO 1 - Ten seconds of progress', :done => i, :total => total) sleep 0.1 end p.close
Use the source, Luke!
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