Ruby script for removing old local and remote git branches

git_remove_old_branches.rb

#!/usr/bin/ruby

branches = `git branch --list `
branches.gsub!('\n')

branches_arr = branches.split

# Removing from the branches_arr the branches you want to keep.
# Add or remove branches from here based on your need.
branches_arr.delete('*')
branches_arr.delete('development')
branches_arr.delete('master')

branches_arr.each do |b|
  `git branch -d #{b}`
  `git push origin --delete #{b}`
end