git-prunable-branches

git-prunable-branches

#!/usr/bin/env ruby

# git_branch_prunable 0.1 - 2011-11-29
# by Paul Mylchreest (paul.mylchreest@mac.com)
#
%x( git branch ).each_line do |branch|
  branch.strip!
  next if branch =~ /master|development|staging/
  cmd = "git log #{branch}  -n 1  --pretty=oneline"
  first_commit_line = %x( #{cmd} )
  commit_id = first_commit_line.match( /([0-9a-z]){40,40}/ )[0]
  cmd = "git branch --contains #{commit_id}"

  branches_containing = %x( #{cmd} ).lines.map{|x| x.strip!}.
                      reject{|x| x =~ /#{branch}/}

  if branches_containing.size > 0
    puts "#{branch} is prunable!"
    puts "branch: #{branch}  commit => #{commit_id}"
    puts "#{branches_containing}"
    if %x( git branch -r | grep #{branch} ).lines.count == 0
      puts "#{branch} has possibly no remote branch!"
      puts "you may need to run: 'git branch -d #{branch}'"
    end
    puts "run: 'git push origin :#{branch}'"
    puts "then: 'git branch -d #{branch}'"
    puts '=' * 80
  end
end

puts "run: 'git remote prune origin' when done."