homebrew avrdude formular with head

avarice.rb

require 'formula'

class Avarice < Formula
  homepage 'http://sourceforge.net/projects/avarice/'
  url 'http://downloads.sourceforge.net/project/avarice/avarice/avarice-2.13/avarice-2.13.tar.bz2'
  sha1 'b0bc56d587600651c0e61be676177b2eebfad3ae'

  head 'http://svn.code.sf.net/p/avarice/code/trunk/avarice'

  depends_on 'libusb-compat'
  if build.head?
    depends_on :automake => :build
  end

  def install
    system "./Bootstrap" if build.head?
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make"
    system "make install"
  end
end

avrdude.rb

require 'formula'

class Avrdude < Formula
  homepage 'http://savannah.nongnu.org/projects/avrdude/'
  url 'http://download.savannah.gnu.org/releases/avrdude/avrdude-5.11.1.tar.gz'
  sha1 '330b3a38d3de6c54d4866819ffb6924ed3728173'

  head 'svn://svn.sv.gnu.org/avrdude/trunk/avrdude'
  depends_on :automake if build.head?

  option 'with-usb', 'Compile AVRDUDE with USB support.'
  depends_on 'libusb-compat' if build.include? 'with-usb'

  def patches
    #fix long delay with usb, see: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=819522
    if build.include? 'with-usb'
          { :p0 => "https://gist.github.com/mheuser/5420908/raw/" }
    end
  end

  def install
    system "./bootstrap" if build.head?
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make"
    system "make install"
  end
end

To install this formular (head + usb):

brew install https://gist.github.com/mheuser/5648925/raw/81f54670723abc98c63704f3b3afff8a38e7b914/avrdude.rb --HEAD --with-usb