remove merged branches; could be generalized and cleaned up but it's already useful in its current form

git-scrub

#!/usr/bin/env ruby

if ARGV.include? '--help'
  puts "git-scrub"
  puts
  puts "Remove all merged and stale branches."
  puts
  puts "  merged = merged into master (the command will only run on the master branch)"
  puts "  stale  = removed from the remote"
  exit 0
end

current_branch = `git rev-parse --abbrev-ref HEAD`.strip

if current_branch != 'master'
  STDERR.puts 'not on master branch'
  exit 1
end

merged = `git branch --merged | grep -v 'master'`.split
merged.each do |branch|
  STDERR.puts branch
  `git branch -d "#{branch}"`
end

`git remote prune origin`