extract_7z_us_rom.rb

# extracts the first potential in a goodrom set
#
require 'tmpdir'
require 'fileutils'

def extract_7z(tmpdir, filename)
  cmd = "7z e -yo\"#{tmpdir}\" \"#{filename}\""
  STDERR.puts "Attempting command #{cmd}"
  `#{cmd}`
end

def patterns
  [/\([J]*U[E]*\)/, /\(S\)/]
end

def find_us_rom(tmpdir)
  entries = Dir.entries(tmpdir)

  found = entries.find do | entry |
    entry if patterns.find do | pattern |
      entry =~ pattern
    end
  end

  found
end

Dir.mktmpdir do |tmpdir|
  outputdir = ARGV[0]
  filename = ARGV[1]

  STDERR.puts "Arguments: #{ARGV}"

  STDERR.puts "Finding US ROM for #{filename}"
  results = extract_7z tmpdir, filename
  STDERR.puts results

  rom = find_us_rom(tmpdir)
  if rom
    tmppath = File.join(tmpdir, rom)
    newpath = File.join(outputdir, rom)
    FileUtils.mv(tmppath, newpath)
    puts "#{newpath}"
  else
    puts "NOT FOUND - #{filename}"
    puts Dir.entries(tmpdir)
    exit 1
  end
end