update_all_git_repo.rb

#!/usr/bin/env ruby

require 'json'
require 'ap'

username = 'kokizzu'

repos = []
repos_len = 0
page = 1

loop do 
  ap "Fetch API users/#{username}/repos page #{page}"
  repos_str = `curl -s https://api.github.com/users/#{username}/repos?page=#{page}&per_page=100`
  repos += JSON.parse(repos_str)
  puts "Total: #{repos.length}"
  break if repos_len == repos.length 
  repos_len = repos.length
  page += 1
end
pwd = Dir.pwd

no = 0
repos.each do |repo|
        no += 1
        Dir.chdir pwd
        ssh_url = repo['ssh_url']
        dirname = ssh_url.split('/').pop
        dirname = dirname.chomp '.git'
        unless File.exists? dirname
                ap "#{no}/#{repos.length} Clone #{ssh_url}"
                puts `git clone --depth 1 #{ssh_url}`
        end
        Dir.chdir dirname
        remote = `git remote -v`
        unless remote.include? 'upstream'
                ap "#{no}/#{repos.length} Fetch API repos/#{username}/#{dirname}"
                git = `curl -s https://api.github.com/repos/#{username}/#{dirname}`
                git = JSON.parse(git)
                upstream = git['parent']['clone_url'] rescue ''
                ap "Pulling forked changes.."
                puts `git pull`
                ap "Adding upstream.. #{upstream}"
                puts `git remote add upstream #{upstream}` if upstream != ''
        end
        remote = `git remote -v`
        if remote.include? 'upstream'
                ap "Fetch upstream.. #{dirname}"
                puts `git fetch upstream`
                ap "Checkout master.. #{dirname}"
                puts `git checkout master`
                ap "Merge upstream/master.. #{dirname}"
                puts `git merge upstream/master`
                ap "Push origin master.. #{dirname}"
                puts `git push origin master`
        end
        ap "Garbage Collect"
        puts `git gc`
end