Fix ghostscript if jpeg7 is already installed

Closes #56

If jpeg7 is already installed when you try to install ghostscript there is a
compilation error.

The answer is to move the included jpeg6 source directory out of the way,
download jpeg7, and create a link to the jpeg7 source inside of the
ghostscript source... ghostscript is none the wiser.

1 files changed, 20 insertions, 10 deletions

diff --git a/Library/Formula/ghostscript.rb b/Library/Formula/ghostscript.rb
index 0b0515695..fac5520b1 100644
--- a/Library/Formula/ghostscript.rb
+++ b/Library/Formula/ghostscript.rb
@@ -1,29 +1,39 @@
 require 'brewkit'
 
 class GhostscriptFonts <Formula
-  @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'
-  @homepage='http://sourceforge.net/projects/gs-fonts/'
-  @md5='6865682b095f8c4500c54b285ff05ef6'
+  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'
+  homepage 'http://sourceforge.net/projects/gs-fonts/'
+  md5 '6865682b095f8c4500c54b285ff05ef6'
 end
 
 class Ghostscript <Formula
-  @url='http://downloads.sourceforge.net/project/ghostscript/GPL%20Ghostscript/8.70/ghostscript-8.70.tar.bz2'
-  @homepage='http://www.ghostscript.com/'
-  @md5='526366f8cb4fda0d3d293597cc5b984b'
-  
+  url 'http://downloads.sourceforge.net/project/ghostscript/GPL%20Ghostscript/8.70/ghostscript-8.70.tar.bz2'
+  homepage 'http://www.ghostscript.com/'
+  md5 '526366f8cb4fda0d3d293597cc5b984b'
+
+  depends_on 'jpeg'
+
   def install
-    # O3 with ghostscript takes an ungodly amount of time
+    # O4 takes an ungodly amount of time
     ENV.O3
     # ghostscript configure ignores LDFLAGs apparently
     ENV['LIBS']="-L/usr/X11/lib"
 
-    system "./configure", "--prefix=#{prefix}", "--disable-debug", 
+    # move the included jpeg6 out of the way so we don't use it
+    FileUtils.rm_rf 'jpeg'
+
+    build_dir = Dir.pwd
+    # download jpeg7, extract it, and fool ghostscript into using it
+    Formula.factory('jpeg').brew do
+      FileUtils.ln Dir.pwd, build_dir+'jpeg'
+    end
+
+    system "./configure", "--prefix=#{prefix}", "--disable-debug",
                           # the cups component adamantly installs to /usr so fuck it
                           "--disable-cups"
     # versioned stuff in main tree is pointless for us
     inreplace 'Makefile', '/$(GS_DOT_VERSION)', ''
     system "make install"
-    (prefix+'share'+'ghostscript'+'doc').rmtree
 
     GhostscriptFonts.new.brew do
       Dir.chdir '..'