Last Updated: February 24, 2019

Rake Progress Bar

It's nice to see progress when running rake tasks over a bunch of records. This is a little class that I use, it updates the screen with the progress of the job.

 class ProgressBar

 def initialize(total)
 @total = total
 @counter = 1
 end

 def increment
 complete = sprintf("%#.2f%", ((@counter.to_f / @total.to_f) * 100))
 print "\r\e[0K#{@counter}/#{@total} (#{complete})"
 @counter += 1
 end

end

To use it in your rake task:

task :foo_bar do
 items = (1..1000).to_a
 progress_bar = ProgressBar.new(items.size)
 items.each do |item|
 item.to_s ## Call a real method here, example: `item.update(foo: 'bar')`
 progress_bar.increment
 end
end

#ruby

#rake

Written by Nick DeSteffen

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1 Response

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brianwisti

This was useful to me in a project just now! I made one small change, adding a parameter to be used as a descriptive string:

class ProgressBar

 def initialize(total, description)
 @description = description
 @total = total
 @counter = 1
 end

 def increment
 complete = sprintf("%#.2f%", ((@counter.to_f / @total.to_f) * 100))
 print "\r\e[0K#{@description} #{@counter}/#{@total} (#{complete})"
 @counter += 1
 end

end

over 1 year ago ·