Github backup script

backup_git_repos.sh

#!/usr/bin/env ruby

require 'json'
require 'open-uri'
require 'fileutils'
require 'net/smtp'

BACKUP_DIR='/home/git/github-backup'
USERNAME='my_username'
URL_REPOS="https://api.github.com/users/#{USERNAME}/repos"
URL_CLONE="[email protected]:#{USERNAME}"

def update(repo_path)
	puts "## update repo #{repo_path}"
	Dir.chdir repo_path
	`git remote update`	
end

def clone(repo_url)
	Dir.chdir BACKUP_DIR
	puts "## fetch repo #{repo_url}"
	`git clone --bare #{repo_url}`
end

def send_email(to,opts={})
  opts[:server]      ||= 'localhost'
  opts[:from]        ||= '[email protected]'
  opts[:from_alias]  ||= 'Github Backup Script'
  opts[:subject]     ||= "Github Backup failed"
  opts[:body]        ||= "Important stuff!"

  msg = <<END_OF_MESSAGE
From: #{opts[:from_alias]} <#{opts[:from]}>
To: <#{to}>
Subject: #{opts[:subject]}

#{opts[:body]}
END_OF_MESSAGE

  Net::SMTP.start(opts[:server]) do |smtp|
    smtp.send_message msg, opts[:from], to
  end
end

puts "## BEGIN github backup: #{Time.now.to_s}"

begin
	myrepos = JSON.load(open(URL_REPOS)).each do |repo|
		
		repo_name = "#{repo["name"]}.git"
		repo_url = repo["ssh_url"]
		repo_path = "#{BACKUP_DIR}/#{repo_name}"

		if not File.directory? BACKUP_DIR
			FileUtils.mkdir_p BACKUP_DIR
		end

		if File.directory? repo_path
			update repo_path
		else
			clone repo_url
		end

	end
rescue Exception => e
	send_email("[email protected]", body:e.message)
end

puts "## END github backup: #{Time.now.to_s}"
puts

crontab

0 */1 * * * git /home/git/helper-scripts/backup_git_repos.rb >>/home/git/github-backup/backup.log 2>&1