Chart your console history with Google Charts

This script was for fun to play around with Google Charts. There was an internet meme going around where programmers were posting their console history on their blogs. I took the output from that script and made a Ruby hash of commands and their frequencies, then sent that data to a Google Charts URL to display them as a 3d pie chart.

    #!/usr/bin/env ruby
    # (c) 2008 Andy Atkinson

    # this awk script is from an internet meme where programmers would post their console history
    # on their blog, it was not made by me, I added sending the results to a google charts 3d pie chart
    # 
    # (1) make a file called "history.rb"
    # (2) RUN THIS:
    #   history 1000 | awk '{a[$2]++}END{for(i in a){print a[i] "=" i}}' | sort -rn | head | ruby history.rb
    #
    output = STDIN.read

    # output should be like:
    #  ["41", "git"]
    #  ["39", "cd"]
    #  ["37", "history"]
    #  ["32", "gs"]

    commands = {}
    output.each do |line|
      count,name = line.chomp.split('=')
      commands[count] = name
    end

    google_charts_url = 'http://chart.apis.google.com/chart?cht=p3&chd=t:'
    url = google_charts_url + commands.keys.join(",") + "&chs=600x200&chl=" + commands.values.join("|")
    `open #{url.dump}`