Have a lot of git repos around? This script will go clean them up for you.

gitgc.rb

# Running: ruby gitgc.rb and it'll do its thing. 
# 
# There's potentially a lot of output if you have a lot of directories
# and if you've never run git gc on them, it can take a while.
#
# Put the full paths of the directories where you keep git repos in the $STARTING_DIRS array:
# Example: 
#  $STARTING_DIRS = ["/Users/me/Documents/Projects"]
#
$STARTING_DIRS = []

def gitgc(dir)
  puts "Dir #{dir} is gitted, so gc'ing it."
  `cd #{dir} && git gc`
end

def crawl(dir)
  entries = Dir.entries(dir)
  
  if entries.include?(".git")
    gitgc(dir)
  end  
  
  # Looking for subdirectories to crawl
  entries.each do |entry|
    full_path = File.join(dir,entry)
    next if entry == ".rvm" || entry == ".." || entry == "." || !File.directory?(full_path)
    if File.directory?(full_path)
      crawl(full_path.to_s)
    end  
  end  
end

$STARTING_DIRS.each do |starting_dir|
  crawl(starting_dir) 
end