a utility to execute commands entered in the console in several git repositories at once

gistfile1.rbx

#!/usr/bin/env ruby
# for each git repo in a subdirectory ...
dirs = Dir['**/.git'].map { |gd| File.dirname(gd) }

def prompt
  print ">> "
  gets
end

# ... execute a command given on STDIN
while command = prompt
  dirs.each do |dir|
    Dir.chdir(dir) do
      puts "~ #{dir}:"
      system command
    end
  end
end

# (press Ctrl+D to break out of the loop)

gistfile2.txt

# usage:
$ cd ~/Library/Application\ Support/TextMate/Bundles
$ each-git

>> git config remote.origin.url
~ AsciiDoc.tmbundle:
git://github.com/zuckschwerdt/asciidoc.tmbundle.git
~ Git.tmbundle:
git://gitorious.org/git-tmbundle/mainline.git
~ GitHub.tmbundle:
git://github.com/drnic/github-tmbundle.git
~ RSpec.tmbundle:
git://github.com/dchelimsky/rspec-tmbundle.git
~ Ruby on Rails.tmbundle:
git://github.com/drnic/ruby-on-rails-tmbundle.git
~ Ruby.tmbundle:
git://github.com/drnic/ruby-tmbundle.git

>> git pull
...