An old rake task to cleanup branches on Github that match master

cleanup_branches.rb

# This script will delete all branches that have been merged to master.
#
# Usage:
# ruby cleanup_branches.rb
#
# Or to delete all remote branches:
# ruby cleanup_branches.rb remote
#
remote = '-r ' if ARGV.first == 'remote'

# Get an array of all remote branches that have been merged
branches =  `git branch #{remote}--merged master`.split("\n")
branches.collect{|b| b.strip!; b.slice!('origin/')}

# Get rid of 'origin/HEAD -> origin/master' and 'origin/master' lines
branches.delete 'HEAD -> origin/master' if remote
branches.delete 'master'

# Get rid of current branch if deleting local branches
branches.reject!{|b| b[0] == '*'}

branches.each do |b|
  p "Deleting #{'remote ' if remote}branch #{b}"
  if remote
    `git push origin :#{b}`
  else
    `git branch -d #{b}`
  end
end