mv-randomize

#!/usr/bin/env ruby

temp = 'some-temp-file-that-doesnt-exist'

args        = ARGV.shuffle!
last        = args.last
cur         = args.shift

unless !cur.nil?
  # need to provide some args!
  exit!
end

# start with renaming the first file to temp
File.rename cur, temp

# recurse through all args
args.each do |a|
  File.rename a, cur
  cur = a
end

# finally, rename the last file back to the one we stored in temp
File.rename temp, cur