gistfile1

#!/usr/bin/env ruby

require 'shell'

def err(s)
  puts s
  exit 1
end

err "Usage: ./build APP_NAME" if !ARGV[0]

shell = Shell.new
app = ARGV[0]
dir = "/home/#{ENV['USER']}/dev/asm/#{app}"

err "Directory does not exist: #{dir}" if !File.exist? (dir)
err "Not a directory: #{dir}" if !File.directory? (dir)

if IO.readlines("#{dir}/#{app}.s")[0] =~ /;32/
  bits = 32
else
  bits = 64
end

shell.transact {
  shell.cd(dir)
  shell.system("nasm -felf#{bits} #{app}.s -o #{app}.o")
  shell.system("ld -melf_i386 #{app}.o -o #{app}")
}