Git pull multiple local repositories with script (ruby?) - ruby

Question

I have ~30 git repositories cloned from github that I use for web/ruby/javascript development. Is it possible to bulk update all of them with a script?
I have everything pretty organized (folder structure):
- Workspace
- Android
- Chrome
- GitClones
- Bootstrap
~ etc...30 some repositories
- iPhone
- osx
- WebDev
I have a ruby script to clone repositories with octokit, but are there any suggestions on how to do git pull (overwriting/rebasing local) in all the repositories under GitClones?
Normally I would just do a pull whenever I was about to use that repo, but I am going to a place where internet connectivity is only going to be available sometimes. So I would like to update everything I can while I have internet.
Thanks! (Running osx 10.8.2)

Answer 1

If you must do it in Ruby, here's a quick and dirty script:
#!/usr/bin/env ruby
Dir.entries('./').select do |entry|
next if %w{. .. ,,}.include? entry
if File.directory? File.join('./', entry)
cmd = "cd #{entry} && git pull"
`#{cmd}`
end
end
Don't forget to chmod +x the file you copy this into and ensure it's in your GitClones directory.

Answer 2

Sure, but why use ruby when shell will suffice?
function update_all() {
for dir in GitClones/*; do
cd "$dir" && git pull
done
}

Answer 3

Change beginning of glob to taste. This does two useful things:
It only git pull when it contains .git subdir
It skips dot (.) dirs since no one has git repos which start with a dot.
Enjoy
# Assumes run from Workspace
Dir['GitClones/[^.]*'].select {|e| File.directory? e }.each do |e|
Dir.chdir(e) { `git pull` } if File.exist? File.join(e, '.git')
end

Answer 4

Revised to provider better output and be OS agnostic. This one cleans local changes, and updates code.
#!/usr/bin/env ruby
require 'pp'
# no stdout buffering
STDOUT.sync = true
# checks for windows/unix for chaining commands
OS_COMMAND_CHAIN = RUBY_PLATFORM =~ /mswin|mingw|cygwin/ ? "&" : ";"
Dir.entries('.').select do |entry|
next if %w{. .. ,,}.include? entry
if File.directory? File.join('.', entry)
if File.directory? File.join('.', entry, '.git')
full_path = "#{Dir.pwd}/#{entry}"
git_dir = "--git-dir=#{full_path}/.git --work-tree=#{full_path}"
puts "\nUPDATING '#{full_path}' \n\n"
puts `git #{git_dir} clean -f #{OS_COMMAND_CHAIN} git #{git_dir} checkout . #{OS_COMMAND_CHAIN} git #{git_dir} pull`
end
end
end