Check git branch been merged or not

gistfile1.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'active_support'

merged = `cd /home/m/git/repositories/miiicasa.git && git branch --merged master | grep -v master`
not_merged_cmd = 'cd /home/m/git/repositories/miiicasa.git && git branch | grep -v master | grep -v support | grep -v qa'
for line in merged.split("\n")
  not_merged_cmd += '| grep -v ' + line
end
puts "This is a regular check of miiiCasa.git branches\n"
puts "List below are branches already been merged into [master]:"
puts "Please check if they are still needed, grb delete them otherwise.\n"
puts merged

puts "\n--------------------\n\n"

puts 'List below are branches order than 1 month and have NOT been merged into [master]:'
puts "Please check if they are abandoned or forgotten."
not_merged = `#{not_merged_cmd}`
for line in not_merged
  date =  /\S+_([0-9]+)_/.match(line)[1]
  puts line if 1.month.ago > Date.parse(date)
end