kill remote branches over N days old

clean_remote_branches.rb

require 'date'

MAX_DAYS_AGO = 8

class Branch
  attr_accessor :name

  def initialize(name)
    @name = name
  end

  def master?
    @name.include? 'master'
  end

  def tracked?
    @name.include? '->'
  end

  def destroy(dry_run=false)
    command = destroy_command
    dry_run ? "DRY RUN: #{command}" : `#{command}`
  end

  def older_than_days number_of_days
    date = Date.parse(log.split(' ')[1])
    Date.today - date > MAX_DAYS_AGO
  end

  private

  def log
    command = "git log #{@name} -1"
    `#{command}`
  end

  def destroy_command
    "git push origin :#{@name.sub('origin/','')}"
  end
end


`git branch -r`.lines.map(&:strip).map{|n| Branch.new(n)}.select do |branch|
  branch.name.start_with? 'origin/'
end.reject do |branch|
  branch.master?
end.reject do |branch|
  branch.tracked?
end.select do |branch|
  branch.older_than_days MAX_DAYS_AGO
end.each { |branch|
  puts branch.destroy
}