Turbulence Light - generates a turbulence dataset for a Ruby git repository

gistfile1.rb

def complexity filename
  File.read(filename).lines.grep(/^([ \t]*)/) { $1 }.map(&:length).reduce(0, :+)
end

commit_filenames = `git log --name-only | grep \.rb$`.lines \
                                                     .map(&:strip) \
                                                     .reject { |fn| fn.include? "_spec" } \
                                                     .reject { |fn| fn.include? "vendor" }

filenames = commit_filenames.uniq
commits = Hash[filenames.zip([0] * filenames.count)]

commit_filenames.each { |fn| commits[fn] = commits[fn] + 1 }

csv_filename = "results.csv"
text = filenames.select {|fn| File.exist?(fn) }.map { |fn| "#{fn}, #{commits[fn]}, #{complexity(fn)}" }.join($/)

File.open(csv_filename,'w') { |f| f.write(text) }
`open #{csv_filename}`