Rename Screenshots OSX

I'll have to figure out how to get this into an automatic folder action somehow, but for now this works:

#!/usr/bin/env ruby
Dir.chdir("Desktop") # works in 1.8.7, later use Dir.home

prefix = "Screen shot-"

dir = Dir.glob("#{prefix}*.*")

dir.each do |file| 

time_date = File.new(file).mtime.strftime("%Y-%m-%d-%H%M-%S") 

new_name = "#{prefix}#{time_date}"

if (file.split(".").count > 1)

extension = file.split(".").last

new_name = "#{new_name}.#{extension}"

end

`mv '#{file}' '#{new_name}'`

end

puts "Renamed #{dir.count} files with prefix #{prefix}"