A script for finding local branches that have not changed in X days.

git-stale-branches

#!/usr/bin/env ruby

unless ARGV.size == 1
  puts "git-stale-branches [days ago]"
  exit
end

require 'date'

days_ago = ARGV.first.to_i
branches = `git for-each-ref refs/heads --format='%(committerdate:raw) %(refname:short)'`
branches.each_line do |line|
  line =~ /^(\d+) -\d+ (\S+)/
  committerdatetime = Time.at($1.to_i)
  committerdate = Date.new(
    committerdatetime.year, committerdatetime.month, committerdatetime.day
  )
  branch_name = $2
  puts branch_name if committerdate + days_ago <= Date.today
end