Generate csv of historical file counts in folders in a git repository

stats

#!/usr/bin/env ruby
# rubocop:disable all

require 'date'

`touch stats.csv`
`echo 'date,base file count,comparison file count' > stats.csv`

def run(date)
  sha = `git rev-list -n 1 --before="#{date.to_s}" master`.chomp

  base_file_count = `git ls-tree -r --name-only #{sha} app/assets/javascripts/sprockets | wc -l`.strip

  comparison_and_base = `git ls-tree -r --name-only #{sha} app/assets/javascripts | wc -l`
  compare_1_count = comparison_and_base.strip.to_i - base_file_count.strip.to_i
  compare_2_count = `git ls-tree -r --name-only #{sha} app/javascript | wc -l`.strip.to_i
  compare_file_count = compare_1_count + compare_2_count

  data = [date.to_s, base_file_count, compare_file_count]

  row = data.join(",")
  `echo '#{row}' >> stats.csv`
end

current_date = Date.today

until current_date <= Date.new(2017,2,14)
  run(current_date)
  current_date = current_date - 30
end