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CD-o-matic with Ruby

Posted by Sandro Paganotti in Ruby on Rails - comments are closed

With just a bunch of ruby lines I created a small utility that fills a folder with songs picked randomly from a choosen repository until the maximum specified size is reached.

This tool is very useful for me ‘cause I can change my USB player music day-by-day without choosing each song from my repository (which is a boring and extremely long operation).

So, here you are the code:

require "ftools" 

# Path were you want to store the randomly picked music
finalpath = "/Users/sandro/mp3xcd/" 
# Path from which pick the music
repository = "/Volumes/ntfs/Musica/" 
# Size Limit for the 'finalpath' folder (in bytes)
sizetomatch = 650000000

selected = []
cursize = 0
candidates = Dir.glob(repository+"**/*.mp3")

while cursize < sizetomatch do
        nr = rand(candidates.length)
        unless selected.include?(candidates[nr])
                selected << candidates[nr]
                puts "Adding: " + File.basename(candidates[nr])
                cursize += File.size(candidates[nr])
                puts "Space Left: " + (sizetomatch - cursize).to_s + " bytes" 
        end
end

selected.each do |f|
    File.copy(f,finalpath + rand(selected.length).to_s  + "-" +  File.basename(f))
    puts "Copying " + f + " to selected folder " 
end 

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