gistfile1.txt

function git_contributions() {
shortstat=$(git log --author=$1 --oneline --shortstat | grep deletions)
`/usr/bin/env ruby <<-RUBY

additions = 0
deletions = 0
%[ $shortstat ].each_line do |line|
  addition_matches = line.match(/(\d+) insertions/)
  additions += addition_matches[1].to_i if addition_matches

  deletion_matches = line.match(/(\d+) deletions/)
  deletions += deletion_matches[1].to_i if deletion_matches
end
puts "echo #{additions} added : #{deletions} deleted"

RUBY`
}