Iterate through dirs in the current directory and do a `git grep` on the given keyword in each one of them.

gitgrepper.rb

#!/usr/bin/env ruby
# Iterate through dirs in the current directory and do a `git grep` on the given keyword in each one of them.
# Outputs the command and each result.

Dir.glob('*/').each do |dir|
  string = ARGV.join(' ').gsub(/(\W)/) do |match|
    '\\%s' % match
  end
  cmd = "cd #{dir} && git grep #{string}"
  output = `#{cmd}`
  next unless output.strip.size > 0
  puts cmd
  puts output.map{|l| '  %s' % l}
  puts
end