Update all git repositories in a specified path

gistfile1.rb

require 'git'

root_path = ARGV[0]

raise 'Specify root path as first parameter e.g. \'/Users/myname\'' unless root_path

# Find all folders wich are git repositories
Dir[File.join(root_path, '*/.git')].each do |git_path|
  path = git_path.gsub('.git', '')
  git = Git.open(path)
  git.fetch
  git.pull
  puts "Updated #{path}"
end