#!/usr/bin/env ruby
# encoding: UTF-8
# Modified github_markup utility which checks first that the file can be rendered before rendering

$LOAD_PATH.unshift File.dirname(File.realpath(__FILE__)) + "/../lib"
require 'github/markup'
require 'charlock_holmes'

if ARGV.size < 1
  print "usage: #{File.basename($0)} FILE\n"
  exit 1
end

name = ARGV.first
file_contents = nil

begin
  file = File.open( name, "r" )
  encoded_contents = file.read
  file.close
  detection = CharlockHolmes::EncodingDetector.detect(encoded_contents)
  file_contents = encoded_contents.encode("UTF-8", detection[:encoding], invalid: :replace, replace: "")
rescue Exception => e
  $stderr.print "error: #{e.message}\n"
  exit 1
ensure
end


if GitHub::Markup.can_render?( name, file_contents )
  print GitHub::Markup.render( name, file_contents )
  exit 0
else
  print "File '#{name}' cannot be rendered.\n"
  exit 1
end