features_maint.rb

#!/usr/bin/env ruby
FEATURE_THRESHOLD=0.2
totals = {
  feature: 0,
  maint: 0,
}

`git rev-list --no-merges 1e1690b..HEAD`.lines.each.with_index do |rev, idx|
  rev = rev.chomp
  added = 0
  removed = 0
  files = []
  `git diff #{rev}^ --numstat`.lines.each do |line|
    next if line.start_with? "-"
    t_added, t_removed, t_file = line.split(/\s/)
    next if t_file.start_with? "vendor"
    files << t_file
    added += t_added.to_i
    removed += t_removed.to_i
    totals[:added]
  end
  if removed == 0 || added / removed < FEATURE_THRESHOLD
    totals[:feature] += added + removed
  else
    totals[:maint] += added + removed
  end
  # puts "Added #{added} Removed #{removed} Files #{files}"
  puts "#{totals.inspect} #{Time.now.to_i}" if idx % 100 == 0
end
puts totals.inspect