require 'formula'

class GhostscriptFonts < Formula
  homepage 'http://sourceforge.net/projects/gs-fonts/'
  url 'http://downloads.sourceforge.net/project/gs-fonts/gs-fonts/8.11%20%28base%2035%2C%20GPL%29/ghostscript-fonts-std-8.11.tar.gz'
  sha1 '2a7198e8178b2e7dba87cb5794da515200b568f5'
end

class GsDjVU < Formula
  homepage 'http://djvu.sourceforge.net/gsdjvu.html'
  url 'http://sourceforge.net/projects/djvu/files/GSDjVu/1.5/gsdjvu-1.5.tar.gz'
  version '1.5'
  sha1 'c7d0677dae5fe644cf3d714c04b3c2c343906342'

  head 'git://git.code.sf.net/p/djvu/gsdjvu-git'
end

class Ghostscript < Formula
  homepage 'http://www.ghostscript.com/'
  url 'http://downloads.ghostscript.com/public/ghostscript-9.07.tar.gz'
  sha1 'b04a88ea8d661fc53d4f7eac34d84456272afc06'

  head 'git://git.ghostscript.com/ghostpdl.git'

  option 'with-djvu', 'Build drivers for DjVU file format'

  # TODO - figure out why this is needed
  env :std if build.include? 'with-djvu'

  if build.head?
    depends_on :automake
    depends_on :libtool
  end

  depends_on 'pkg-config' => :build
  depends_on 'jpeg'
  depends_on 'libtiff'
  depends_on 'jbig2dec'
  depends_on :libpng
  depends_on :x11 => ['2.7.2', :optional]
  depends_on 'djvulibre' if build.include? 'with-djvu'

  # Fix dylib names, per installation instructions
  def patches
    DATA
  end

  def move_included_source_copies
    # If the install version of any of these doesn't match
    # the version included in ghostscript, we get errors
    # Taken from the MacPorts portfile - http://bit.ly/ghostscript-portfile
    renames = %w(jpeg libpng tiff zlib jbig2dec)
    renames << "freetype" if MacOS.version >= :lion
    renames.each do |lib|
      mv lib, "#{lib}_local"
    end
  end

  def install
    ENV.deparallelize

    src_dir = build.head? ? "gs" : "."

    if build.include? 'with-djvu'
      GsDjVU.new.brew do
        inreplace 'gdevdjvu.c', /#include "gserror.h"/, ''
        (buildpath+'base').install 'gdevdjvu.c'
        (buildpath+'lib').install 'ps2utf8.ps'
        ENV['EXTRA_INIT_FILES'] = 'ps2utf8.ps'
        (buildpath/'base/contrib.mak').open('a').write(File.read('gsdjvu.mak'))
      end
    end

    cd src_dir do
      move_included_source_copies
      args = %W[
        --prefix=#{prefix}
        --disable-cups
        --disable-compile-inits
        --disable-gtk
        --with-system-libtiff
      ]
      args << '--without-x' unless build.with? 'x11'

      if build.head?
        system './autogen.sh', *args
      else
        system './configure', *args
      end

      # versioned stuff in main tree is pointless for us
      inreplace 'Makefile', '/$(GS_DOT_VERSION)', ''

      inreplace 'Makefile' do |s|
        s.change_make_var!('DEVICE_DEVS17','$(DD)djvumask.dev $(DD)djvusep.dev')
      end if build.include? 'with-djvu'

      # Install binaries and libraries
      system 'make install'
      system 'make install-so'
    end

    GhostscriptFonts.new.brew do
      (share+'ghostscript').install '../fonts'
    end

    (man+'de').rmtree
  end
end

__END__
--- a/base/unix-dll.mak
+++ b/base/unix-dll.mak
@@ -59,12 +59,12 @@
 
 
 # MacOS X
-#GS_SOEXT=dylib
-#GS_SONAME=$(GS_SONAME_BASE).$(GS_SOEXT)
-#GS_SONAME_MAJOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
-#GS_SONAME_MAJOR_MINOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
+GS_SOEXT=dylib
+GS_SONAME=$(GS_SONAME_BASE).$(GS_SOEXT)
+GS_SONAME_MAJOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_SOEXT)
+GS_SONAME_MAJOR_MINOR=$(GS_SONAME_BASE).$(GS_VERSION_MAJOR).$(GS_VERSION_MINOR).$(GS_SOEXT)
 #LDFLAGS_SO=-dynamiclib -flat_namespace
-LDFLAGS_SO_MAC=-dynamiclib -install_name $(GS_SONAME_MAJOR_MINOR)
+LDFLAGS_SO_MAC=-dynamiclib -install_name __PREFIX__/lib/$(GS_SONAME_MAJOR_MINOR)
 #LDFLAGS_SO=-dynamiclib -install_name $(FRAMEWORK_NAME)
 
 GS_SO=$(BINDIR)/$(GS_SONAME)