Class: N65::FrontEnd

Inherits:
Object
  • Object
show all
Defined in:
lib/n65/front_end.rb

Overview

This class handles the front end aspects,

parsing the commandline options and running the assembler

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ FrontEnd

Initialize with ARGV commandline



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# File 'lib/n65/front_end.rb', line 13

def initialize(argv)
  @options = {:output_file => nil}
  @argv = argv.dup
end

Instance Method Details

#run ⇒ Object

Run the assembler



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# File 'lib/n65/front_end.rb', line 21

def run
  ##  First use the option parser
  parser = create_option_parser
  parser.parse!(@argv)

  ##  Whatever is leftover in argv the input files
  if @argv.size.zero?
    STDERR.puts("No input files")
    exit(1)
  end

  ##  Only can assemble one file at once for now
  if @argv.size != 1
    STDERR.puts "Can only assemble one input file at once :("
    exit(1)
  end

  input_file = @argv.shift

  ##  Make sure the input file exists
  unless File.exists?(input_file)
    STDERR.puts "Input file #{input_file} does not exist"
    exit(1)
  end
  
  ##  Maybe they didn't provide an output file name, so we'll guess
  if @options[:output_file].nil?
    ext = File.extname(input_file)
    @options[:output_file] = input_file.gsub(ext, '') + '.nes'
  end

  if @options.values.any?(&:nil?)
    STDERR.puts "Missing options try --help"
    exit(1)
  end

  #begin
    N65::Assembler.from_file(input_file, @options[:output_file])
  #rescue StandardError => error
    #STDERR.puts("Assemble Failed!")
    #STDERR.puts(error.class)
    #if error.message
      #STDERR.puts(error.message)
    #end
    #exit(1)
  #end
end