Coda run the current document in ruby plugin script

coda_runscript.rb

#!/usr/bin/env ruby

# This is the script code to run. It runs the script based on the file path to the script not text passed in.
# In Panic's "Coda Plug-in Creator" I've set the following options:
# Command is: Run Document
# Keyboard shortcut: Command-Option-R
# On Run: Save
# On Success: Nothing
# STDIN None
# STDOUT New Document


$stdout.flush
search_path = ENV['PATH'].dup
search_path = "/usr/local/bin:#{search_path}"
ENV['PATH'] = search_path
filepath = ENV['CODA_FILEPATH']

puts `#{filepath} 2>&1`