class Haml::Exec::Haml

def initialize(args)
  super
  @options[:for_engine] = {}
  @options[:requires] = []
  @options[:load_paths] = []
end

def process_result
  super
  @options[:for_engine][:filename] = @options[:filename]
  input = @options[:input]
  output = @options[:output]
  template = input.read()
  input.close() if input.is_a? File
  @options[:load_paths].each {|p| $LOAD_PATH << p}
  @options[:requires].each {|f| require f}
  begin
    engine = ::Haml::Engine.new(template, @options[:for_engine])
    if @options[:check_syntax]
      puts "Syntax OK"
      return
    end
    if @options[:debug]
      puts engine.precompiled
      puts '=' * 100
    end
    result = engine.to_html
  rescue Exception => e
    raise e if @options[:trace]
    case e
    when ::Haml::SyntaxError; raise "Syntax error on line #{get_line e}: #{e.message}"
    when ::Haml::Error;       raise "Haml error on line #{get_line e}: #{e.message}"
    else raise "Exception on line #{get_line e}: #{e.message}\n  Use --trace for backtrace."
    end
  end
  output.write(result)
  output.close() if output.is_a? File
end

def set_opts(opts)
  super
  opts.banner = <<END
 haml [options] [INPUT] [OUTPUT]
ption:
erts Haml files to HTML.
s:
  opts.on('-c', '--check', "Just check syntax, don't evaluate.") do
    require 'stringio'
    @options[:check_syntax] = true
    @options[:output] = StringIO.new
  end
  opts.on('-t', '--style NAME',
          'Output style. Can be indented (default) or ugly.') do |name|
    @options[:for_engine][:ugly] = true if name.to_sym == :ugly
  end
  opts.on('-f', '--format NAME',
          'Output format. Can be xhtml (default), html4, or html5.') do |name|
    @options[:for_engine][:format] = name.to_sym
  end
  opts.on('-e', '--escape-html',
          'Escape HTML characters (like ampersands and angle brackets) by default.') do
    @options[:for_engine][:escape_html] = true
  end
  opts.on('--no-escape-attrs',
          "Don't escape HTML characters (like ampersands and angle brackets) in attributes.") do
    @options[:for_engine][:escape_attrs] = false
  end
  opts.on('-q', '--double-quote-attributes',
          'Set attribute wrapper to double-quotes (default is single).') do
    @options[:for_engine][:attr_wrapper] = '"'
  end
  opts.on('-r', '--require FILE', "Same as 'ruby -r'.") do |file|
    @options[:requires] << file
  end
  opts.on('-I', '--load-path PATH', "Same as 'ruby -I'.") do |path|
    @options[:load_paths] << path
  end
  unless RUBY_VERSION < "1.9"
    opts.on('-E ex[:in]', 'Specify the default external and internal character encodings.') do |encoding|
      external, internal = encoding.split(':')
      Encoding.default_external = external if external && !external.empty?
      Encoding.default_internal = internal if internal && !internal.empty?
    end
  end
  opts.on('--debug', "Print out the precompiled Ruby source.") do
    @options[:debug] = true
  end
end