Ruby script to close old branches in a given repo

close_old_branches.rb

#!/usr/bin/env ruby

Dir.chdir(ARGV[0])
raw_changeset_hashes = `hg log -r "head() and not(closed()) and not(date(-30)) and not outgoing()" --template "{node}\n"`
changeset_hashes = raw_changeset_hashes.split(/\n/)
if (changeset_hashes.length > 0)
  changeset_hashes.each do | h | 
    if (system("hg up #{h}"))
      system('hg ci --close-branch -m "Closed automatically. Last changeset aged past 30 days"')
      system('hg nudge')
    end
  end
else
  puts "Nothing to do"
end