module Rubbish

# File lib/rubbish.rb, line 26
def self.method_missing(cmd, *args, **kw, &block)
  cmd=cmd[0..-2].to_sym unless read=(cmd[-1]!='?')
  return super unless SHELL_VERSION.has_key?(cmd) and args.length.between?(0,1)
  if minimum = SHELL_VERSION[cmd]
    minimum = Gem::Version.new minimum
    if version = `#{cmd} --version`.match(/\d+\.\d+\.\d+/)&.match(0)
      version  = Gem::Version.new version
      bumped = minimum.bump
      unless version >= minimum and version < bumped
        raise "Need #{cmd} version ~> #{minimum}"
      end
      # need to only check once
      SHELL_VERSION[cmd] = nil
    else
      raise "Could not get the #{cmd} version"
    end
  end
  command = [cmd.to_s]
  if kw.length > 0
    kw.each do |k,w|
      next if not w
      if w==true
        command << "#{k.length>1? '--':'-'}#{k}"
      else
        command << "--#{k}=#{w}"
      end
    end
  end
  script = args[0]
  return Rubbish.shell(script, shell:command, read:read,  &block)
end

# File lib/rubbish.rb, line 7
def self.shell(script=nil, shell:'bash', read:true, &block)
  IO.popen(shell, (read)? 'w+' : 'w') do |pipe|
    # No matter what, we know we're going to write first.
    writing = true
    if script
      # We were given the script, so we write it and close.
      pipe.write script
      pipe.close_write
      writing = false
    end
    block.call(pipe) if block
    # close if we were writing
    pipe.close_write if writing
    # Read if reading
    read = pipe.read if read
  end
  read || $?.to_i==0
end