svn pre-commit hook that prevents text files (based on extension) from being committed if they contain a Byte Order Mark (BOM). If using on windows must wrap in a batch script

pre-commit.rb

#!/usr/bin/env ruby
# pre-commit.rb
# Exit 1 if is a text file and has a BOM at the head of the file

# Create list of file extensions that are considered text files. 
text_files = [
  ".awk",
	".bas",
	".bat",
	".cfc",
	".cfm",
	".cfml",
	".config",
	".cs",
	".css",
	".csv",
	".dot",
	".htm",
	".html",
	".java",
	".js",
	".log",
	".mxml",
	".php",
	".pl",
	".properties",
	".py",
	".rb",
	".rdf",
	".sh",
	".sql",
	".svg",
	".txt",
	".wsdl",
	".xml",
	".yml" ]
if text_files.include? File.extname(ARGV[0]).downcase
	if File.open(ARGV[0]) {|f| f.read(3)} == "\xEF\xBB\xBF"
		$stderr.puts " --------------------------------------------------------------------------- "	
		$stderr.puts " Your commit has been blocked because a Byte Order Mark (BOM)"
		$stderr.puts " (http://en.wikipedia.org/wiki/Byte_order_mark) has been detected at the top"
		$stderr.puts " of the file."
		$stderr.puts " "
		$stderr.puts " Please remove the BOM and recommit"
		$stderr.puts " "
		$stderr.puts " To remove: open in Notepad++, Encoding > Encode in UTF-8 without BOM, Save"
		$stderr.puts " --------------------------------------------------------------------------- "
		exit 1
	end
end